From fc1d5f81eb9b5ed451d68502b3953da8c7d2bc70 Mon Sep 17 00:00:00 2001 From: Kelly Kochanski Date: Thu, 29 Aug 2019 10:05:59 -0700 Subject: [PATCH 01/83] Syntax fix in paper.bib --- docs/paper.bib | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) diff --git a/docs/paper.bib b/docs/paper.bib index 3351805..a403895 100644 --- a/docs/paper.bib +++ b/docs/paper.bib @@ -39,7 +39,7 @@ @article{Lehning2002 } @article{Filhol2015, - author = "Filhol, S., and M. Sturm" + author = "Filhol, S., and M. Sturm", year = 2015, title = "Snow bedforms: A review, new data, and a formation model", journal = "Journal of Geophysical Research: Earth Surface" @@ -130,7 +130,7 @@ @article{Kochanski2018 } @article{Liston2018, - author = "Liston, G. E., R. B. Haehnel, M. Sturm, C. A. Hiemstra, S. Berezovskaya, R. D. Tabler" + author = "Liston, G. E., R. B. Haehnel, M. Sturm, C. A. Hiemstra, S. Berezovskaya, R. D. Tabler", year = "2007", title = "Simulating complex snow distributions in windy environments using SnowTran-3D", journal = "Journal of Glaciology", @@ -149,4 +149,4 @@ @article{Gallee2012 issue = "1", pages = "133-147", doi = "10.1007/s10546-012-9764-z" -} \ No newline at end of file +} From 089eb555f97985311324d3215f0952d2babd8a2d Mon Sep 17 00:00:00 2001 From: Kelly Kochanski Date: Thu, 29 Aug 2019 11:06:06 -0700 Subject: [PATCH 02/83] Syntax fix #2 in paper.bib --- docs/paper.bib | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/docs/paper.bib b/docs/paper.bib index a403895..371390d 100644 --- a/docs/paper.bib +++ b/docs/paper.bib @@ -42,7 +42,7 @@ @article{Filhol2015 author = "Filhol, S., and M. Sturm", year = 2015, title = "Snow bedforms: A review, new data, and a formation model", - journal = "Journal of Geophysical Research: Earth Surface" + journal = "Journal of Geophysical Research: Earth Surface", volume = 120, issue = 9, doi = "10.1002/2015JF003529" @@ -77,6 +77,7 @@ @article{Kochanski2019 pages = "1267--1281", doi = "10.5194/tc-13-1267-2019" } + @article{Lammel2012, author = "Lammel, M.", year = "2012", From 37dd322392c7ea61c9a780e033ccd04a67cb0d78 Mon Sep 17 00:00:00 2001 From: Kelly Kochanski Date: Thu, 29 Aug 2019 13:47:47 -0700 Subject: [PATCH 03/83] Removed Availability from paper.md --- paper.md | 4 ---- 1 file changed, 4 deletions(-) diff --git a/paper.md b/paper.md index 121a493..cd6b49b 100644 --- a/paper.md +++ b/paper.md @@ -84,10 +84,6 @@ As a second example, we aim to make it easier for geoscientists to run robust nu We have therefore set up structures for configuring, running, and analyzing parallel simulation instances. We hope that the above practices will enable users to run high-quality numerical experiments with Rescal-snow. -# Availability - -This software, distributed under the GNU General Public License v3.0, is available at [https://github.com/LLNL/Rescal-snow](https://github.com/LLNL/Rescal-snow) along with its installation guide and [tutorials](docs/rescal-snow-tutorials.md). - # Acknowledgements This work was performed under the auspices of the U.S. Department of Energy by Lawrence Livermore National Laboratory under Contract DE-AC52-07NA27344. This paper is released under LLNL-JRNL-786878-DRAFT. From ac097b48a8a68b8412b5d101d6c795046a97b3b1 Mon Sep 17 00:00:00 2001 From: Kelly Kochanski Date: Thu, 29 Aug 2019 13:52:36 -0700 Subject: [PATCH 04/83] Reorganizing paper directory --- {docs => paper}/paper.bib | 0 paper.md => paper/paper.md | 1 + 2 files changed, 1 insertion(+) rename {docs => paper}/paper.bib (100%) rename paper.md => paper/paper.md (99%) diff --git a/docs/paper.bib b/paper/paper.bib similarity index 100% rename from docs/paper.bib rename to paper/paper.bib diff --git a/paper.md b/paper/paper.md similarity index 99% rename from paper.md rename to paper/paper.md index cd6b49b..18e7c90 100644 --- a/paper.md +++ b/paper/paper.md @@ -16,6 +16,7 @@ authors: affiliation: 2 - name: Richard Barnes affiliation: "4" + orcid: 0000-0002-0204-6040 - name: Carlos Downie affiliation: 2 - name: Adam Rubin From 1659a416cff32c4a103057d45d07ce6c83b1e42d Mon Sep 17 00:00:00 2001 From: Kelly Kochanski Date: Thu, 29 Aug 2019 17:34:34 -0700 Subject: [PATCH 05/83] Correcting pointer to paper.bib --- paper/paper.md | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/paper/paper.md b/paper/paper.md index 18e7c90..79f3f45 100644 --- a/paper/paper.md +++ b/paper/paper.md @@ -36,7 +36,7 @@ affiliations: - name: Department of Civil Engineering, University of Colorado at Boulder, Boulder, CO, USA index: 5 date: 21 July 2019 -bibliography: docs/paper.bib +bibliography: paper/paper.bib --- # Summary From 13e372a662824975c38d64cfe9661bd2f9f5b1d0 Mon Sep 17 00:00:00 2001 From: Arfon Smith Date: Fri, 30 Aug 2019 09:52:03 -0700 Subject: [PATCH 06/83] Update paper.md (#25) --- paper/paper.md | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/paper/paper.md b/paper/paper.md index 79f3f45..7a827ea 100644 --- a/paper/paper.md +++ b/paper/paper.md @@ -36,7 +36,7 @@ affiliations: - name: Department of Civil Engineering, University of Colorado at Boulder, Boulder, CO, USA index: 5 date: 21 July 2019 -bibliography: paper/paper.bib +bibliography: paper.bib --- # Summary @@ -94,3 +94,5 @@ Robert Anderson and Gregory Tucker (CU) for advice on the scientific direction o and Tapasya Patki, Divya Mohan, Jeff Booher-Kaeding and Aaron Robeson (LLNL) for minor contributions to Rescal-snow. The project was supported by a Department of Energy Computational Science Graduate Fellowship (DE-FG02-97ER25308), by support from the Data Science Summer Institute at Lawrence Livermore National Laboratory, and by a UROP award from the University of Colorado. + +# References From 883ec1df30a5f32287195e09660f9256a060bf99 Mon Sep 17 00:00:00 2001 From: Kelly Kochanski Date: Fri, 30 Aug 2019 11:05:59 -0700 Subject: [PATCH 07/83] Fixing references in paper.md --- paper/paper.md | 20 ++++++++++---------- 1 file changed, 10 insertions(+), 10 deletions(-) diff --git a/paper/paper.md b/paper/paper.md index 18e7c90..d67d164 100644 --- a/paper/paper.md +++ b/paper/paper.md @@ -41,27 +41,27 @@ bibliography: docs/paper.bib # Summary -One of the most intriguing effects of wind on snow is the creation of mysterious and captivating shapes known as snow bedforms. These features ornament Antarctica, Arctic sea ice, tundra, and many mountain tops [@filhol:2015; @kochanski:2018; @kobayashi:1980]. +One of the most intriguing effects of wind on snow is the creation of mysterious and captivating shapes known as snow bedforms. These features ornament Antarctica, Arctic sea ice, tundra, and many mountain tops [@Filhol2015; @Kochanski2018; @Kobayashi1980]. They change the reflectivity and average thermal conductivity of snow, and may well change the patterns of snow accumulation and transport. They also present a range of interesting self-organized shapes that might interest geomorphologists and Earth surface process scientists. Despite these effects, however, they are poorly understood and not yet included in major snow models. Several recent field studies have identified new computational components needed for a good understanding of snow bedforms. First, most snow bedforms (e.g ripples, barchan dunes, snow-steps and sastrugi) are between 0.1 and 2 m in length, with select bedforms (e.g. snow-waves, some whaleback dunes) extending from 5 to 30 m. -These length scales are based on physical phenomena such as the hop length of blowing snow grains [@kobayashi:1980] and the length scales of turbulent structures in the wind [@kobayashi:1980, @kochanski:2019]. -Existing models of wind-blown snow, however, are designed to model snow redistribution over mountainous [@liston:2007; @lehning:2002; @marsh:2018] or continental [@gallee:2013] scales +These length scales are based on physical phenomena such as the hop length of blowing snow grains [@Kobayashi1980] and the length scales of turbulent structures in the wind [@Kobayashi1980, @Kochanski2019]. +Existing models of wind-blown snow, however, are designed to model snow redistribution over mountainous [@Liston2007; @Lehning2002; @Marsh2018] or continental [@Gallee2012] scales (with grid sizes of 0.1-10 km) and are unable to resolve the processes that lead to the formation of snow bedforms. -Second, snow bedforms are the result of a balance between sand-like granular motion and cohesive resistance [@kochanski:2019; @filhol:2015]. -Existing sand dune models (e.g. @narteau:2014, @lammel:2012 ) successfully model a wide range of granular processes, including sand avalanches and wind-driven saltation, suspension, and creep. +Second, snow bedforms are the result of a balance between sand-like granular motion and cohesive resistance [@Kochanski2019; @Filhol2015]. +Existing sand dune models (e.g. @Narteau2014, @Lammel2012 ) successfully model a wide range of granular processes, including sand avalanches and wind-driven saltation, suspension, and creep. These models, however, have not had reason to include the kinds of time-dependent cohesion that occur in snow. -Similarly, the simulations that have advanced our understanding of cohesion and sintering in snow (e.g. @herwignen:2013 , @colbeck:1983 ) have focused on immobile snow, without considering the effects of interrupting metamorphosis with motion. -Third, snow bedforms tend to move during and immediately after snowfall events [@kochanski:2018], which are also not included in existing dune models. +Similarly, the simulations that have advanced our understanding of cohesion and sintering in snow (e.g. @Colbeck1983 ) have focused on immobile snow, without considering the effects of interrupting metamorphosis with motion. +Third, snow bedforms tend to move during and immediately after snowfall events [@Kochanski2018], which are also not included in existing dune models. These features collectively indicate a need for a new computational model that maps snow processes, such as cohesion and snowfall, into a granular physics framework. Rescal-snow is designed to enable the quantitative study of snow bedforms. It simulates 10-100 m domains at 0.05-0.20 m resolution, allowing it to capture all but the smallest snow bedforms. -The simulation is adapted from a sand dune model, ReSCAL [@narteau:2014], and inherits ReSCAL's granular transport capacities. +The simulation is adapted from a cellular automaton sand dune model, ReSCAL [@Narteau2014], and inherits ReSCAL's granular transport capacities. We have added features to simulate processes unique to snow, including snowfall and time-dependent cohesion. Fluid processes are modelled with a lattice gas cellular automaton, a method chosen to provide a good approximation to the Navier-Stokes equation at reasonable computational cost. Finally, the backbone of the simulation is a cellular automaton, an algorithm known to be particularly good for modelling self-organization. @@ -74,9 +74,9 @@ The present limitations of Rescal-snow mostly concern length scales, time scales The output of Rescal-snow is disretized in length, which limits its ability to resolve tiny (<0.05 m) features, and by cell type, which limits its ability to represent the full spectrum of gradual changes in the nature of snow, such as those that occur during sintering. The natural length and time scales of Rescal-snow are set by the configuration of the cellular automata. -Although these can be related to real length and time scales, it requires careful calibration: this is described fully in @narteau:2009. +Although these can be related to real length and time scales, it requires careful calibration: this is described fully in @Narteau2009. Moreover, we have not yet been able to model particularly sharp-edged snow features, such as snow-steps or sastrugi. -We attribute this to Rescal-snow's relatively simple fluid dynamics algorithm and inability to resolve the flow detachments [@kochanski:2019] that likely form at the corners of snow-steps and sastrugi. +We attribute this to Rescal-snow's relatively simple fluid dynamics algorithm and inability to resolve the flow detachments [@Kochanski2019] that likely form at the corners of snow-steps and sastrugi. We aim to demonstrate good practices that will encourage robust, reproducible science by releasing Rescal-snow through Journal of Open Source Science. For example, we expect that our work will be many users' first introduction to some subset of bash, C, Python or high-performance computing, and we endeavored to make this a positive learning experience. From ceb34cf23016e3d642b786818252331524cd346d Mon Sep 17 00:00:00 2001 From: Kelly Kochanski Date: Fri, 30 Aug 2019 11:07:26 -0700 Subject: [PATCH 08/83] Added missing references to paper.bib --- paper/paper.bib | 47 +++++++++++++++++++++++++++++++++++++++++++++-- 1 file changed, 45 insertions(+), 2 deletions(-) diff --git a/paper/paper.bib b/paper/paper.bib index 371390d..c2a506e 100644 --- a/paper/paper.bib +++ b/paper/paper.bib @@ -8,6 +8,38 @@ @article{Clark2012 doi = "10.1029/2011WR010745" } +@article{Narteau2014, + author = "Rozier, O., and Narteau, C.", + year = 2014, + title = "A real‐space cellular automaton laboratory", + journal = "Earth Surface Processes and Landforms", + volume = 39, + issue = 1, + pages = "98-109", + doi = "10.1002/esp.3479" +} + +@article{Narteau2009, + author = "Narteau, C., Zhang, D., Rozier, O., & Claudin, P.", + year = 2009, + title = "Setting the length and time scales of a cellular automaton dune model from the analysis of superimposed bed forms", + journal = "Journal of Geophysical Research: Earth Surface", + volume = 114, + issue = F3, + doi = "10.1002/esp.3479" +} + +@article{Liston2007, + author = "Liston, G. E., Haehnel, R. B., Sturm, M., Hiemstra, C. A., Berezovskaya, S., & Tabler, R. D.", + year = 2007, + title = "Simulating complex snow distributions in windy environments using SnowTran-3D", + journal = "Journal of Glaciology", + volume = 53, + issue = 181, + pages = "241-256", + doi = "10.3189/172756507782202865" +} + @article{Lenaerts2012, author = "Lenaerts, J. T. M., M. R. van den Broeke, W. J. van de Berg, E. van Meijgaard, P. Kuipers Munneke", title = "A new, high-resolution surface mass balance map of Antarctica (1979-2010) based on regional atmospheric climate modeling", @@ -28,6 +60,17 @@ @article{Blanchard2015 year = 2015 } +@article{Colbeck1983, + author = "Colbeck, S. C.", + year = 1983, + title = "Theory of metamorphism of dry snow", + journal = "Journal of Geophysical Research: Oceans", + volume = 88, + issue = C9, + pages = "5475-5482", + doi = "10.1029/JC088iC09p05475" +} + @article{Lehning2002, author = "Lehning, M., P. Bartelt, B. Brown, C. Fierz", title = "A physical SNOWPACK model for the Swiss avalanche warning: Part III: meteorological forcing, thin layer formation and evaluation", @@ -109,7 +152,7 @@ @article{Herwijnen2013 doi = "10.3189/2013JoG12J094" } -@article{Marsh2018, +@article{2018, author = "Marsh, C. B., R. J. Spiteri, J. W. Pomeroy, and H. S. Wheater", year = "2018", journal = "Computers & Geosciences", @@ -130,7 +173,7 @@ @article{Kochanski2018 doi = "10.1029/2018GL077616" } -@article{Liston2018, +@article{2018, author = "Liston, G. E., R. B. Haehnel, M. Sturm, C. A. Hiemstra, S. Berezovskaya, R. D. Tabler", year = "2007", title = "Simulating complex snow distributions in windy environments using SnowTran-3D", From b93602ee5a040faa6d9e2aeb3c11c5929eeb91d9 Mon Sep 17 00:00:00 2001 From: Kelly Kochanski Date: Fri, 30 Aug 2019 11:12:29 -0700 Subject: [PATCH 09/83] Added year to Lehning reference --- paper/paper.bib | 14 ++------------ 1 file changed, 2 insertions(+), 12 deletions(-) diff --git a/paper/paper.bib b/paper/paper.bib index c2a506e..84e0244 100644 --- a/paper/paper.bib +++ b/paper/paper.bib @@ -77,6 +77,7 @@ @article{Lehning2002 journal = "Cold Regions Science and Technology", volume = 35, issue = 3, + year = 2002, pages = "169--184", doi = "10.1016/S0165-232X(02)00072-1" } @@ -152,7 +153,7 @@ @article{Herwijnen2013 doi = "10.3189/2013JoG12J094" } -@article{2018, +@article{Marsh2018, author = "Marsh, C. B., R. J. Spiteri, J. W. Pomeroy, and H. S. Wheater", year = "2018", journal = "Computers & Geosciences", @@ -173,17 +174,6 @@ @article{Kochanski2018 doi = "10.1029/2018GL077616" } -@article{2018, - author = "Liston, G. E., R. B. Haehnel, M. Sturm, C. A. Hiemstra, S. Berezovskaya, R. D. Tabler", - year = "2007", - title = "Simulating complex snow distributions in windy environments using SnowTran-3D", - journal = "Journal of Glaciology", - volume = "53", - issue = "181", - pages = "241--256", - doi = "10.3189/172756507782202865" -} - @article{Gallee2012, author = "Gallee, H., A. Trouvilliez, C. Agosta, C. Genthon, V. Favier, F. Naiim-Bouvet", year = "2012", From b8d95b72979bf74c0569a6152f4c8ad329fd43d9 Mon Sep 17 00:00:00 2001 From: Kelly Kochanski Date: Fri, 30 Aug 2019 11:13:04 -0700 Subject: [PATCH 10/83] Removed excess white space around references --- paper/paper.md | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/paper/paper.md b/paper/paper.md index 7eda810..9fadb20 100644 --- a/paper/paper.md +++ b/paper/paper.md @@ -53,9 +53,9 @@ Existing models of wind-blown snow, however, are designed to model snow redistri (with grid sizes of 0.1-10 km) and are unable to resolve the processes that lead to the formation of snow bedforms. Second, snow bedforms are the result of a balance between sand-like granular motion and cohesive resistance [@Kochanski2019; @Filhol2015]. -Existing sand dune models (e.g. @Narteau2014, @Lammel2012 ) successfully model a wide range of granular processes, including sand avalanches and wind-driven saltation, suspension, and creep. +Existing sand dune models (e.g. @Narteau2014, @Lammel2012) successfully model a wide range of granular processes, including sand avalanches and wind-driven saltation, suspension, and creep. These models, however, have not had reason to include the kinds of time-dependent cohesion that occur in snow. -Similarly, the simulations that have advanced our understanding of cohesion and sintering in snow (e.g. @Colbeck1983 ) have focused on immobile snow, without considering the effects of interrupting metamorphosis with motion. +Similarly, the simulations that have advanced our understanding of cohesion and sintering in snow (e.g. @Colbeck1983) have focused on immobile snow, without considering the effects of interrupting metamorphosis with motion. Third, snow bedforms tend to move during and immediately after snowfall events [@Kochanski2018], which are also not included in existing dune models. These features collectively indicate a need for a new computational model that maps snow processes, such as cohesion and snowfall, into a granular physics framework. From c3f152a8599266a7ef8cf4bd26280668b8012dd3 Mon Sep 17 00:00:00 2001 From: Kelly Kochanski Date: Fri, 30 Aug 2019 11:22:44 -0700 Subject: [PATCH 11/83] Replacing "&" with "and" in paper.bib --- paper/paper.bib | 31 ++++++++++--------------------- 1 file changed, 10 insertions(+), 21 deletions(-) diff --git a/paper/paper.bib b/paper/paper.bib index 84e0244..b57534e 100644 --- a/paper/paper.bib +++ b/paper/paper.bib @@ -1,5 +1,5 @@ @article{Clark2012, - author = "Clark, M. P., J. Hendrikx, A. G. Slater, D. Kavetski, B. Anderson, N. J. Cullen, T. Kerr, E. O Hreinsson, and R. A. Woods", + author = "Clark, M. P., and J. Hendrikx, and A. G. Slater, and D. Kavetski, and B. Anderson, and N. J. Cullen, and T. Kerr, and E. O Hreinsson, and R. A. Woods", year = 2011, title = "Representing spatial variability of snow water equivalent in hydrologic and land-surface models: A review", journal = "Water Resources Research", @@ -20,7 +20,7 @@ @article{Narteau2014 } @article{Narteau2009, - author = "Narteau, C., Zhang, D., Rozier, O., & Claudin, P.", + author = "Narteau, C., and Zhang, D., and Rozier, O., and Claudin, P.", year = 2009, title = "Setting the length and time scales of a cellular automaton dune model from the analysis of superimposed bed forms", journal = "Journal of Geophysical Research: Earth Surface", @@ -41,7 +41,7 @@ @article{Liston2007 } @article{Lenaerts2012, - author = "Lenaerts, J. T. M., M. R. van den Broeke, W. J. van de Berg, E. van Meijgaard, P. Kuipers Munneke", + author = "Lenaerts, J. T. M. and van den Broeke, M. R. and van de Berg, W. and van Meijgaard, E., and Munneke, P. K.", title = "A new, high-resolution surface mass balance map of Antarctica (1979-2010) based on regional atmospheric climate modeling", journal = "Geophysical Research Letters", volume = 39, @@ -51,7 +51,7 @@ @article{Lenaerts2012 } @article{Blanchard2015, - author = "Blanchard-Wrigglesworth, E., S. L. Farrell, T. Newman, and C. M. Bitz", + author = "Blanchard-Wrigglesworth, and E., S. L. Farrell, and T. Newman, and C. M. Bitz", title = "Snow cover on Arctic sea ice in observations and an Earth System Model", journal = "Geophysical Research Letters", volume = 42, @@ -72,7 +72,7 @@ @article{Colbeck1983 } @article{Lehning2002, - author = "Lehning, M., P. Bartelt, B. Brown, C. Fierz", + author = "Lehning, M. and Bartelt, P. and Brown, B. and Fierz, C.", title = "A physical SNOWPACK model for the Swiss avalanche warning: Part III: meteorological forcing, thin layer formation and evaluation", journal = "Cold Regions Science and Technology", volume = 35, @@ -92,8 +92,8 @@ @article{Filhol2015 doi = "10.1002/2015JF003529" } -@article{Gallee2012, - author = "Gall\'ee, H., A. Trouvilliez, C. Agosta, C. Genthon, V. Favier, F. Naiim-Bouvet", +@article{, + author = "Gall\'ee, H., and A. Trouvilliez, and C. Agosta, and C. Genthon, and V. Favier, and F. Naiim-Bouvet", year = 2012, title = "Transport of snow by the wind: A comparison between observations in Ad'elie Land, Antarctica, and simulations made with the regional climate model MAR", journal = "Boundary-Layer Meteorology", @@ -113,7 +113,7 @@ @article{Kobayashi1980 } @article{Kochanski2019, - author = "Kochanski, K., R. S. Anderson, and G. E. Tucker", + author = "Kochanski, K., and Anderson, R. S. and Tucker, G. E.", year = 2019, title = "The evolution of snow bedforms in the Colorado Front Range and the processes that shape them", journal = "The Cryosphere", @@ -154,7 +154,7 @@ @article{Herwijnen2013 } @article{Marsh2018, - author = "Marsh, C. B., R. J. Spiteri, J. W. Pomeroy, and H. S. Wheater", + author = "Marsh, C. B. and Spiteri, R. J. and Pomeroy, J. W. and Wheater, H. S.", year = "2018", journal = "Computers & Geosciences", title = "Multi-objective unstructured triangular mesh generation for use in hydrological and land surface models", @@ -164,7 +164,7 @@ @article{Marsh2018 } @article{Kochanski2018, - author = "Kochanski, K., R. S. Anderson, and G. E. Tucker", + author = "Kochanski, K., and Anderson, R. S. and Tucker, G. E.", year = "2018", title = "Statistical classification of self-organized snow surfaces", journal = "Geophysical Research Letters", @@ -173,14 +173,3 @@ @article{Kochanski2018 pages = "6532--6541", doi = "10.1029/2018GL077616" } - -@article{Gallee2012, - author = "Gallee, H., A. Trouvilliez, C. Agosta, C. Genthon, V. Favier, F. Naiim-Bouvet", - year = "2012", - title = "Transport of Snow by the Wind: A Comparison Between Observations in Adelie Land, Antarctica, and Simulations Made with the Regional Climate Model MAR", - journal = "Boundary-Layer Meteorology", - volume = "146", - issue = "1", - pages = "133-147", - doi = "10.1007/s10546-012-9764-z" -} From 2b800d4cb1948a54e9c561930977522133ab48e6 Mon Sep 17 00:00:00 2001 From: Kelly Kochanski Date: Fri, 30 Aug 2019 11:23:58 -0700 Subject: [PATCH 12/83] Bugfix paper.bib Gallee2012 --- paper/paper.bib | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/paper/paper.bib b/paper/paper.bib index b57534e..ef7f957 100644 --- a/paper/paper.bib +++ b/paper/paper.bib @@ -92,7 +92,7 @@ @article{Filhol2015 doi = "10.1002/2015JF003529" } -@article{, +@article{Gallee2012, author = "Gall\'ee, H., and A. Trouvilliez, and C. Agosta, and C. Genthon, and V. Favier, and F. Naiim-Bouvet", year = 2012, title = "Transport of snow by the wind: A comparison between observations in Ad'elie Land, Antarctica, and simulations made with the regional climate model MAR", From 7c068cefd04e8d06bcb2144ce4b0d1496dfa8eaa Mon Sep 17 00:00:00 2001 From: Kelly Kochanski Date: Fri, 30 Aug 2019 11:29:30 -0700 Subject: [PATCH 13/83] Syntax fix in Liston2007 --- paper/paper.bib | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/paper/paper.bib b/paper/paper.bib index ef7f957..89c72a9 100644 --- a/paper/paper.bib +++ b/paper/paper.bib @@ -30,7 +30,7 @@ @article{Narteau2009 } @article{Liston2007, - author = "Liston, G. E., Haehnel, R. B., Sturm, M., Hiemstra, C. A., Berezovskaya, S., & Tabler, R. D.", + author = "Liston, G. E., and Haehnel, R. B., and Sturm, M., and Hiemstra, and C. A., Berezovskaya, S., and Tabler, R. D.", year = 2007, title = "Simulating complex snow distributions in windy environments using SnowTran-3D", journal = "Journal of Glaciology", From d4c804c58722ac9bfdffc6d8441f6662715a22e5 Mon Sep 17 00:00:00 2001 From: Kelly Kochanski Date: Fri, 30 Aug 2019 11:48:38 -0700 Subject: [PATCH 14/83] Update paper.md pdf rendering made it clear that paper appearance would be improved by subheadings --- paper/paper.md | 36 ++++++++++++++++++++++-------------- 1 file changed, 22 insertions(+), 14 deletions(-) diff --git a/paper/paper.md b/paper/paper.md index 9fadb20..8024639 100644 --- a/paper/paper.md +++ b/paper/paper.md @@ -41,24 +41,29 @@ bibliography: paper.bib # Summary -One of the most intriguing effects of wind on snow is the creation of mysterious and captivating shapes known as snow bedforms. These features ornament Antarctica, Arctic sea ice, tundra, and many mountain tops [@Filhol2015; @Kochanski2018; @Kobayashi1980]. +When wind blows over dry snow, it creates captivating shapes known as snow bedforms. +These features ornament Antarctica, Arctic sea ice, tundra, and many mountain tops [@Filhol2015; @Kochanski2018; @Kobayashi1980]. They change the reflectivity and average thermal conductivity of snow, and may well change the patterns of snow accumulation and transport. They also present a range of interesting self-organized shapes that might interest geomorphologists and Earth surface process scientists. Despite these effects, however, they are poorly understood and not yet included in major snow models. +## Requirements of a snow bedform model Several recent field studies have identified new computational components needed for a good understanding of snow bedforms. First, most snow bedforms (e.g ripples, barchan dunes, snow-steps and sastrugi) are between 0.1 and 2 m in length, with select bedforms (e.g. snow-waves, some whaleback dunes) extending from 5 to 30 m. These length scales are based on physical phenomena such as the hop length of blowing snow grains [@Kobayashi1980] and the length scales of turbulent structures in the wind [@Kobayashi1980, @Kochanski2019]. Existing models of wind-blown snow, however, are designed to model snow redistribution over mountainous [@Liston2007; @Lehning2002; @Marsh2018] or continental [@Gallee2012] scales (with grid sizes of 0.1-10 km) and are unable to resolve the processes that lead to the formation of snow bedforms. + Second, snow bedforms are the result of a balance between sand-like granular motion and cohesive resistance [@Kochanski2019; @Filhol2015]. Existing sand dune models (e.g. @Narteau2014, @Lammel2012) successfully model a wide range of granular processes, including sand avalanches and wind-driven saltation, suspension, and creep. These models, however, have not had reason to include the kinds of time-dependent cohesion that occur in snow. -Similarly, the simulations that have advanced our understanding of cohesion and sintering in snow (e.g. @Colbeck1983) have focused on immobile snow, without considering the effects of interrupting metamorphosis with motion. +Similarly, the simulations that have advanced our understanding of cohesion and sintering in snow (e.g. @Colbeck1983, @Lehning2002a) have focused on immobile snow, without considering the effects of interrupting metamorphosis with motion. + Third, snow bedforms tend to move during and immediately after snowfall events [@Kochanski2018], which are also not included in existing dune models. -These features collectively indicate a need for a new computational model that maps snow processes, such as cohesion and snowfall, into a granular physics framework. +Thus, computational studies of snow bedforms will require a model that incorporates snow processes, such as cohesion and snowfall, into a granular physics framework at a relatively high (<0.1 m) resolution. +## Features of Rescal-snow Rescal-snow is designed to enable the quantitative study of snow bedforms. It simulates 10-100 m domains at 0.05-0.20 m resolution, allowing it to capture all but the smallest snow bedforms. The simulation is adapted from a cellular automaton sand dune model, ReSCAL [@Narteau2014], and inherits ReSCAL's granular transport capacities. @@ -66,24 +71,27 @@ We have added features to simulate processes unique to snow, including snowfall Fluid processes are modelled with a lattice gas cellular automaton, a method chosen to provide a good approximation to the Navier-Stokes equation at reasonable computational cost. Finally, the backbone of the simulation is a cellular automaton, an algorithm known to be particularly good for modelling self-organization. +### Example simulations We have been able to use Rescal-snow to simulate the formation and movement of snow dunes and snow-waves under a range of wind, snowfall, and sintering conditions. We illustrate these results through the example simulations in our `README` file, and in the [associated tutorial](docs/rescal-snow-tutorial.md), which also leads readers through a previously-unmodelled scientific question: how do bedforms affect the accumulation of snow? -The present limitations of Rescal-snow mostly concern length scales, time scales, and the representation of turbulence. -The output of Rescal-snow is disretized in length, which limits its ability to resolve tiny (<0.05 m) features, and by cell type, which limits its ability to represent the full spectrum of gradual changes in the nature of snow, such as those that occur -during sintering. +### Limitations The natural length and time scales of Rescal-snow are set by the configuration of the cellular automata. -Although these can be related to real length and time scales, it requires careful calibration: this is described fully in @Narteau2009. -Moreover, we have not yet been able to model particularly sharp-edged snow features, such as snow-steps or sastrugi. -We attribute this to Rescal-snow's relatively simple fluid dynamics algorithm and inability to resolve the flow detachments [@Kochanski2019] that likely form at the corners of snow-steps and sastrugi. +Although these can be related to real length and time scales, it requires careful calibration, as described fully in @Narteau2009. +The length scale of Rescal-snow cells, for reasonable model configurations, is 0.05-0.15 m. This limits the model's ability to resolve centimeter-scale snow features, such as snow-steps [@Kochanski2019], and to successfully model sharp-edged features, such as sastrugi. +As a cellular automata, Rescal-snow cells also have discrete states. Our sintering process, for example, is binary: it includes 'loose' and 'sintered' snow grains, but does not represent intermediate states. (Although it is possible to implement an arbitrarily large number of cell states in the cellular automaton, this incurs a significant performance cost.) Thus, Rescal-snow only approximates the effects of snow metamorphosis and cannot represent those processes with the level of subtlety available in continuous models such as @Lehning2002a. + +### Good practices in computational snow science We aim to demonstrate good practices that will encourage robust, reproducible science by releasing Rescal-snow through Journal of Open Source Science. -For example, we expect that our work will be many users' first introduction to some subset of bash, C, Python or high-performance computing, and we endeavored to make this a positive learning experience. -Our examples include scientifically interesting applications of all of these skills, and our tutorial is punctuated with references to relevant tutorials. -As a second example, we aim to make it easier for geoscientists to run robust numerical experiments which explore many relevant variables and allow for trustworthy uncertainty quantification. -We have therefore set up structures for configuring, running, and analyzing parallel simulation instances. -We hope that the above practices will enable users to run high-quality numerical experiments with Rescal-snow. +Our work is aimed at gemorphologists and snow scientists, and we use this model frequently while working with students. +We expect that our work will be many users' first introduction to some subset of bash, git, C, Python or high-performance computing, and we aim to make this a positive learning experience. +Therefore, we designed our examples around scientific applications of all of these skills, and we punctuate them with references to relevant tutorials on git, bash, etc. + +We also believe that good computational science is easier when users are able to make large numbers of model runs. +This scalability allows users order to test the stability of the model, explore a wide range of physical parameters, and gain an accurate understanding of the model uncertainty. +We have set up structures for configuring, running, and analyzing parallel simulation instances to enable users to run high-quality numerical experiments with Rescal-snow. # Acknowledgements From fd916e817015934d7cd310577d0f4f9aa96bdabe Mon Sep 17 00:00:00 2001 From: Kelly Kochanski Date: Fri, 30 Aug 2019 11:53:17 -0700 Subject: [PATCH 15/83] Added reference --- paper/paper.bib | 11 +++++++++++ 1 file changed, 11 insertions(+) diff --git a/paper/paper.bib b/paper/paper.bib index 89c72a9..86fade9 100644 --- a/paper/paper.bib +++ b/paper/paper.bib @@ -173,3 +173,14 @@ @article{Kochanski2018 pages = "6532--6541", doi = "10.1029/2018GL077616" } + +@article{Lehning2002a, +author = "Lehning, M. and Bartelt, P. and Brown, B. and Fierz, C. and Satyawali, P.", +year = 2002, +title = "A physical SNOWPACK model for the Swiss avalanche warning: Part II. Snow microstructure", +journal = "Cold regions science and technology", +volume = 35, +issue = 3, +pages = "147-167", +doi = "10.1016/S0165-232X(02)00073-3" +} From 7745912babc30395b6eecff3464f7a2aea204e1c Mon Sep 17 00:00:00 2001 From: Kelly Kochanski Date: Fri, 30 Aug 2019 12:02:22 -0700 Subject: [PATCH 16/83] Image -> paper.md --- paper/paper.md | 16 ++++++++++------ 1 file changed, 10 insertions(+), 6 deletions(-) diff --git a/paper/paper.md b/paper/paper.md index 8024639..d3ecfd8 100644 --- a/paper/paper.md +++ b/paper/paper.md @@ -42,10 +42,11 @@ bibliography: paper.bib # Summary When wind blows over dry snow, it creates captivating shapes known as snow bedforms. -These features ornament Antarctica, Arctic sea ice, tundra, and many mountain tops [@Filhol2015; @Kochanski2018; @Kobayashi1980]. -They change the reflectivity and average thermal conductivity of snow, and may well change the patterns of snow accumulation and transport. -They also present a range of interesting self-organized shapes that might interest geomorphologists and Earth surface process scientists. -Despite these effects, however, they are poorly understood and not yet included in major snow models. +These features, which include snow dunes, waves, snow-steps and sastrugi (figure below), ornament Antarctica, Arctic sea ice, tundra, and mountain ridges [@Filhol2015; @Kochanski2018; @Kobayashi1980]. +They change the reflectivity and average thermal conductivity of snow, and may change the patterns of snow accumulation and transport. +Despite these effects, however, they are poorly understood and their effects are not yet included in major snow or climate models. + +![](../docs/example_images/field_examples.png) ## Requirements of a snow bedform model Several recent field studies have identified new computational components needed for a good understanding of snow bedforms. @@ -58,7 +59,7 @@ and are unable to resolve the processes that lead to the formation of snow bedfo Second, snow bedforms are the result of a balance between sand-like granular motion and cohesive resistance [@Kochanski2019; @Filhol2015]. Existing sand dune models (e.g. @Narteau2014, @Lammel2012) successfully model a wide range of granular processes, including sand avalanches and wind-driven saltation, suspension, and creep. These models, however, have not had reason to include the kinds of time-dependent cohesion that occur in snow. -Similarly, the simulations that have advanced our understanding of cohesion and sintering in snow (e.g. @Colbeck1983, @Lehning2002a) have focused on immobile snow, without considering the effects of interrupting metamorphosis with motion. +Similarly, the simulations that have advanced our understanding of cohesion and sintering in snow (e.g. @Colbeck1983, @Lehning2002a) have focused on immobile snow. Third, snow bedforms tend to move during and immediately after snowfall events [@Kochanski2018], which are also not included in existing dune models. Thus, computational studies of snow bedforms will require a model that incorporates snow processes, such as cohesion and snowfall, into a granular physics framework at a relatively high (<0.1 m) resolution. @@ -71,6 +72,9 @@ We have added features to simulate processes unique to snow, including snowfall Fluid processes are modelled with a lattice gas cellular automaton, a method chosen to provide a good approximation to the Navier-Stokes equation at reasonable computational cost. Finally, the backbone of the simulation is a cellular automaton, an algorithm known to be particularly good for modelling self-organization. +This simulation will allow snow scientists to translate field studies, which are location-specific, into general terms. +It will also make it easier to investigate the effects of snow bedforms on (1) surface roughness, (2) snow cover fractions, and (3) accumulation rates. This will allow us to describe the effects of meter-scale bedforms in terms of variables that affect regional climates. + ### Example simulations We have been able to use Rescal-snow to simulate the formation and movement of snow dunes and snow-waves under a range of wind, snowfall, and sintering conditions. We illustrate these results through the example simulations in our `README` file, @@ -90,7 +94,7 @@ We expect that our work will be many users' first introduction to some subset of Therefore, we designed our examples around scientific applications of all of these skills, and we punctuate them with references to relevant tutorials on git, bash, etc. We also believe that good computational science is easier when users are able to make large numbers of model runs. -This scalability allows users order to test the stability of the model, explore a wide range of physical parameters, and gain an accurate understanding of the model uncertainty. +This allows users order to test the stability of the model, explore a wide range of physical parameters, and gain an accurate understanding of the model uncertainty. We have set up structures for configuring, running, and analyzing parallel simulation instances to enable users to run high-quality numerical experiments with Rescal-snow. # Acknowledgements From dbfbe145974aeba3bcd1817747e1c2a70e52757d Mon Sep 17 00:00:00 2001 From: Kelly Kochanski Date: Fri, 30 Aug 2019 12:11:32 -0700 Subject: [PATCH 17/83] Cellular automata mechanics image --- paper/paper.md | 2 ++ 1 file changed, 2 insertions(+) diff --git a/paper/paper.md b/paper/paper.md index d3ecfd8..a812328 100644 --- a/paper/paper.md +++ b/paper/paper.md @@ -72,6 +72,8 @@ We have added features to simulate processes unique to snow, including snowfall Fluid processes are modelled with a lattice gas cellular automaton, a method chosen to provide a good approximation to the Navier-Stokes equation at reasonable computational cost. Finally, the backbone of the simulation is a cellular automaton, an algorithm known to be particularly good for modelling self-organization. +![](../docs/example_images/rescal-snow_transitions.png) + This simulation will allow snow scientists to translate field studies, which are location-specific, into general terms. It will also make it easier to investigate the effects of snow bedforms on (1) surface roughness, (2) snow cover fractions, and (3) accumulation rates. This will allow us to describe the effects of meter-scale bedforms in terms of variables that affect regional climates. 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Date: Fri, 30 Aug 2019 12:15:51 -0700 Subject: [PATCH 19/83] Paper figure size adjusted --- paper/paper.md | 8 ++++---- 1 file changed, 4 insertions(+), 4 deletions(-) diff --git a/paper/paper.md b/paper/paper.md index a812328..0a01262 100644 --- a/paper/paper.md +++ b/paper/paper.md @@ -46,7 +46,7 @@ These features, which include snow dunes, waves, snow-steps and sastrugi (figure They change the reflectivity and average thermal conductivity of snow, and may change the patterns of snow accumulation and transport. Despite these effects, however, they are poorly understood and their effects are not yet included in major snow or climate models. -![](../docs/example_images/field_examples.png) +![Figure 1](../docs/example_images/field_examples.png) ## Requirements of a snow bedform model Several recent field studies have identified new computational components needed for a good understanding of snow bedforms. @@ -66,13 +66,13 @@ Thus, computational studies of snow bedforms will require a model that incorpora ## Features of Rescal-snow Rescal-snow is designed to enable the quantitative study of snow bedforms. -It simulates 10-100 m domains at 0.05-0.20 m resolution, allowing it to capture all but the smallest snow bedforms. +The backbone of the simulation is a cellular automaton, an algorithm known for its ability to model self-organization, in which cells evolve by changing from one discrete state to another in nearest-neighbor pairs (figure below). +Rescal-snow simulates 10-100 m domains at 0.05-0.20 m resolution, allowing it to capture all but the smallest snow bedforms. The simulation is adapted from a cellular automaton sand dune model, ReSCAL [@Narteau2014], and inherits ReSCAL's granular transport capacities. We have added features to simulate processes unique to snow, including snowfall and time-dependent cohesion. Fluid processes are modelled with a lattice gas cellular automaton, a method chosen to provide a good approximation to the Navier-Stokes equation at reasonable computational cost. -Finally, the backbone of the simulation is a cellular automaton, an algorithm known to be particularly good for modelling self-organization. -![](../docs/example_images/rescal-snow_transitions.png) +![Figure 2](../docs/example_images/rescal-snow_transitions.png =330x) This simulation will allow snow scientists to translate field studies, which are location-specific, into general terms. It will also make it easier to investigate the effects of snow bedforms on (1) surface roughness, (2) snow cover fractions, and (3) accumulation rates. This will allow us to describe the effects of meter-scale bedforms in terms of variables that affect regional climates. 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Date: Fri, 30 Aug 2019 12:18:01 -0700 Subject: [PATCH 21/83] Revert "Paper figure size adjusted" --- paper/paper.md | 8 ++++---- 1 file changed, 4 insertions(+), 4 deletions(-) diff --git a/paper/paper.md b/paper/paper.md index 0a01262..a812328 100644 --- a/paper/paper.md +++ b/paper/paper.md @@ -46,7 +46,7 @@ These features, which include snow dunes, waves, snow-steps and sastrugi (figure They change the reflectivity and average thermal conductivity of snow, and may change the patterns of snow accumulation and transport. Despite these effects, however, they are poorly understood and their effects are not yet included in major snow or climate models. -![Figure 1](../docs/example_images/field_examples.png) +![](../docs/example_images/field_examples.png) ## Requirements of a snow bedform model Several recent field studies have identified new computational components needed for a good understanding of snow bedforms. @@ -66,13 +66,13 @@ Thus, computational studies of snow bedforms will require a model that incorpora ## Features of Rescal-snow Rescal-snow is designed to enable the quantitative study of snow bedforms. -The backbone of the simulation is a cellular automaton, an algorithm known for its ability to model self-organization, in which cells evolve by changing from one discrete state to another in nearest-neighbor pairs (figure below). -Rescal-snow simulates 10-100 m domains at 0.05-0.20 m resolution, allowing it to capture all but the smallest snow bedforms. +It simulates 10-100 m domains at 0.05-0.20 m resolution, allowing it to capture all but the smallest snow bedforms. The simulation is adapted from a cellular automaton sand dune model, ReSCAL [@Narteau2014], and inherits ReSCAL's granular transport capacities. We have added features to simulate processes unique to snow, including snowfall and time-dependent cohesion. Fluid processes are modelled with a lattice gas cellular automaton, a method chosen to provide a good approximation to the Navier-Stokes equation at reasonable computational cost. +Finally, the backbone of the simulation is a cellular automaton, an algorithm known to be particularly good for modelling self-organization. -![Figure 2](../docs/example_images/rescal-snow_transitions.png =330x) +![](../docs/example_images/rescal-snow_transitions.png) This simulation will allow snow scientists to translate field studies, which are location-specific, into general terms. It will also make it easier to investigate the effects of snow bedforms on (1) surface roughness, (2) snow cover fractions, and (3) accumulation rates. This will allow us to describe the effects of meter-scale bedforms in terms of variables that affect regional climates. 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Date: Fri, 30 Aug 2019 12:23:13 -0700 Subject: [PATCH 23/83] Typo fix --- paper/paper.bib | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/paper/paper.bib b/paper/paper.bib index 86fade9..ee47955 100644 --- a/paper/paper.bib +++ b/paper/paper.bib @@ -95,7 +95,7 @@ @article{Filhol2015 @article{Gallee2012, author = "Gall\'ee, H., and A. Trouvilliez, and C. Agosta, and C. Genthon, and V. Favier, and F. Naiim-Bouvet", year = 2012, - title = "Transport of snow by the wind: A comparison between observations in Ad'elie Land, Antarctica, and simulations made with the regional climate model MAR", + title = "Transport of snow by the wind: A comparison between observations in Ad\'elie Land, Antarctica, and simulations made with the regional climate model MAR", journal = "Boundary-Layer Meteorology", volume = 146, issue = 1, From c754cb324482f2ca3dc7a19fb4eb21afb550d56e Mon Sep 17 00:00:00 2001 From: Kelly Kochanski Date: Wed, 4 Sep 2019 09:38:13 -0600 Subject: [PATCH 24/83] JOSS review badge. --- README.md | 3 +++ 1 file changed, 3 insertions(+) diff --git a/README.md b/README.md index f8ca21b..47f92d6 100644 --- a/README.md +++ b/README.md @@ -1,6 +1,9 @@ # Rescal-snow A model of dunes and snow waves +HTML: +Markdown: [![status](https://joss.theoj.org/papers/822d9380fa5ce6f89cbbdebf1605df14/status.svg)](https://joss.theoj.org/papers/822d9380fa5ce6f89cbbdebf1605df14) + ![](docs/example_images/snowfall_example.gif) 1. [Motivation](#introduction) From 03bdffc4d90f221c869d736f05a22fbd7a5eeb95 Mon Sep 17 00:00:00 2001 From: Kelly Kochanski Date: Wed, 4 Sep 2019 09:38:35 -0600 Subject: [PATCH 25/83] JOSS review badge. --- README.md | 3 +-- 1 file changed, 1 insertion(+), 2 deletions(-) diff --git a/README.md b/README.md index 47f92d6..be673e0 100644 --- a/README.md +++ b/README.md @@ -1,8 +1,7 @@ # Rescal-snow A model of dunes and snow waves -HTML: -Markdown: [![status](https://joss.theoj.org/papers/822d9380fa5ce6f89cbbdebf1605df14/status.svg)](https://joss.theoj.org/papers/822d9380fa5ce6f89cbbdebf1605df14) +[![status](https://joss.theoj.org/papers/822d9380fa5ce6f89cbbdebf1605df14/status.svg)](https://joss.theoj.org/papers/822d9380fa5ce6f89cbbdebf1605df14) ![](docs/example_images/snowfall_example.gif) From 6f4e47e4b82278b38d58fb10f943ef0022ff8d32 Mon Sep 17 00:00:00 2001 From: Kelly Kochanski Date: Tue, 17 Sep 2019 12:09:37 -0600 Subject: [PATCH 26/83] Italicized parameter names in docs/rescal-snow-inputs.md --- docs/rescal-snow-inputs.md | 36 ++++++++++++++++++------------------ 1 file changed, 18 insertions(+), 18 deletions(-) diff --git a/docs/rescal-snow-inputs.md b/docs/rescal-snow-inputs.md index 39137c6..06daecb 100644 --- a/docs/rescal-snow-inputs.md +++ b/docs/rescal-snow-inputs.md @@ -30,21 +30,21 @@ The run script (run.run, snow_cone.run, etc) is a bash script. You can modify it ### The parameter script This file contains a list of parameters controlling simulation physics. - - Output_directory : output goes here, useful for data management. - - Model: rescal-snow can be compiled to allow or disallow certain physics. To ensure the compiled version works with the model you want to run, this must match the compiler flag in src/defs.h. Example: `Model = SNO` here, `#define MODEL_SNO` in src/defs.h. - - Csp_template : gives a template name and arguments for initial conditions. These are defined and described in src/genesis.c. - - Phys_prop_file : points to the real data file described in the section below. - - Simulation size H, L, D : sets size of simulation in cells. + - *Output_directory* : output goes here, useful for data management. + - *Model*: rescal-snow can be compiled to allow or disallow certain physics. To ensure the compiled version works with the model you want to run, this must match the compiler flag in src/defs.h. Example: `Model = SNO` here, `#define MODEL_SNO` in src/defs.h. + - *Csp_template* : gives a template name and arguments for initial conditions. These are defined and described in src/genesis.c. + - *Phys_prop_file* : points to the real data file described in the section below. + - Simulation size *H*, *L*, *D* : sets size of simulation in cells. - Boundary conditions : OPEN, PERIODIC, or REINJECTION. Determines what happens to cells that pass the downwind boundary of the simulation. - - Lambda_X, Coef_X : control the rates of cell transitions, the main control on model physics. These are best shown graphically: see Fig. 2 of [Narteau et al., 2009](dx.doi.org/10.1029/2008JF001127). + - *Lambda_X*, *Coef_X* : control the rates of cell transitions, which define/control the model physics. These are best shown graphically: see Fig. 2 of [Narteau et al., 2009](dx.doi.org/10.1029/2008JF001127). The parameters you are likely to want to modify for snow studies include: - - Csp_template : the initial conditions, see src/genesis.c - - Tau_min : the control for wind speed - note that wind speed *decreases* non-linearly as you increase Tau_min - - Lambda_I : the snowfall rate (must use `Csp_template = SNOWFALL`) - - Lambda_S : the sintering rate - - Lambda_F : the hardness of sintered snow, relative to the hardness of freshly-fallen snow - - Coef_A : the ratio between vertical and horizontal transport of snow in air; controls the particle settling speed + - *Csp_template* : the initial conditions, see src/genesis.c + - *Tau_min* : the control for wind speed - note that wind speed *decreases* non-linearly as you increase Tau_min + - *Lambda_I* : the snowfall rate (must use `Csp_template = SNOWFALL`) + - *Lambda_S* : the sintering rate + - *Lambda_F* : the hardness of sintered snow, relative to the hardness of freshly-fallen snow + - *Coef_A* : the ratio between vertical and horizontal transport of snow in air; controls the particle settling speed ### The real_data folder @@ -52,12 +52,12 @@ All of the information we have given rescal-snow so far has been non-dimensional This file contains information about the physical situation that rescal-snow represents. For more discussion on converting rescal-snow output to reality, see 'docs/calibration_and_validation.md'. The file scripts/real_data/sealevel_snow.prop contains the following variables: - - kappa: the von Karman constant, dimensionless, generally agreed to be near 0.4 - - z_0: the [aerodynamic roughness length](https://en.wikipedia.org/wiki/Roughness_length) of the surface, m - - rhoair: the density of the fluid that moves the grains, kg/m^3 - - rhosand: the density of the particles being moved by the fluid, kg/m^3 - - g: gravitational acceleration, m/s^2, always close to 9.81 on Earth - - d: the diameter of the particles, m + - *kappa*: the von Karman constant, dimensionless, generally agreed to be near 0.4 + - *z_0*: the [aerodynamic roughness length](https://en.wikipedia.org/wiki/Roughness_length) of the surface, m + - *rhoair*: the density of the fluid that moves the grains, kg/m^3 + - *rhosand*: the density of the particles being moved by the fluid, kg/m^3 + - *g*: gravitational acceleration, m/s^2, always close to 9.81 on Earth + - *d*: the diameter of the particles, m Take care while calculating these variables. Their values vary considerably for real snow, sand and air. We have endeavored to give reasonable defaults in sealevel_snow.prop but do not expect these to represent all real situations. The accuracy of these numbers directly affects the accuracy of the dune sizes, speeds, etc produced by rescal-snow. From 2a68a60c41ce5cf94fd4c4dec3eb8f5aad745f75 Mon Sep 17 00:00:00 2001 From: Kelly Kochanski Date: Tue, 17 Sep 2019 14:13:39 -0600 Subject: [PATCH 27/83] Replaced "from numpy import *" in csp_creator Replaced zeros with np.zeros, int8 with np.int8 --- scripts/utilities/csp_creator.py | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/scripts/utilities/csp_creator.py b/scripts/utilities/csp_creator.py index eff20f6..e02b8df 100644 --- a/scripts/utilities/csp_creator.py +++ b/scripts/utilities/csp_creator.py @@ -1,6 +1,6 @@ #!/usr/bin/python -from numpy import * +import numpy as np ## DUN model MOD_NAME="DUN" @@ -17,7 +17,7 @@ def create_simple_space(H,L,D): """creates a simple cellular space without sand""" ## create cellular space - cs=zeros((D,H,L),int8) + cs=np.zeros((D,H,L),np.int8) ## air volume cs[:,:,:]=EAUC From 9570a8d93e458552e0037200fffeaaee7a530e7c Mon Sep 17 00:00:00 2001 From: Kelly Kochanski Date: Tue, 17 Sep 2019 14:39:58 -0600 Subject: [PATCH 28/83] Improving doc consistency in rescal_utilities.py Moved docstrings below function name, defined all with triple quotes """ Changed class names to CamelCase Replaced double underscores (name mangling) with single underscores (non-mangled non-public names) --- scripts/utilities/rescal_utilities.py | 291 ++++++++++++++------------ 1 file changed, 156 insertions(+), 135 deletions(-) diff --git a/scripts/utilities/rescal_utilities.py b/scripts/utilities/rescal_utilities.py index 36e5c44..efef607 100644 --- a/scripts/utilities/rescal_utilities.py +++ b/scripts/utilities/rescal_utilities.py @@ -2,7 +2,7 @@ # Utilities to set up run scripts quickly and easily; these tools are designed to aid parameter space # explorations, sensitivity analyses, and large batches of runs. # Parameters : Class to hold, update, change, or write all the parameters that ReSCAL needs to run -# Run_Script : Class to hold, update, change, or write a ReSCAL run script with appropriate flags +# RunScript : Class to hold, update, change, or write a ReSCAL run script with appropriate flags # This includes almost all options and inputs, except those in the "real_data" file. import os @@ -11,35 +11,38 @@ import subprocess import glob -class Design_a_run(): - # Design a ReSCAL run - # This interfaces with both the Parameters and Run_Script utilities - # in order to produce run script and parameter files simultaneously - # using a standardized input format +class DesignRun(): + """ + Design a ReSCAL run + This interfaces with both the Parameters and RunScript utilities + in order to produce run script and parameter files simultaneously + using a standardized input format + """ def __init__(self): self.name = 'run' self.directory = '.' self.parameters = Parameters() - self.run_script = Run_Script() + self.run_script = RunScript() self.parameters.set_header("Test from write_tests.py") def set_parameters(self, param_dict): - # Sets all parameters, given as {name : value} pairs - # Allows user to mix things that go in parameter file - # with things that go in the run script, etc - # TODO make it possible to do compiler flags too? + """ + Sets all parameters, given as {name : value} pairs + Allows user to mix things that go in parameter file + with things that go in the run script, etc + """ for name in param_dict.keys(): - if self.__is_a_parameter(name): + if self._is_a_parameter(name): self.parameters.set({name : param_dict[name]}) - elif self.__is_a_run_script_option(name): + elif self._is_a_run_script_option(name): self.run_script.set({name : param_dict[name]}) else: print("Warning : skipped nonexistent parameter " + name) def list_all(self): - # Lists all available options/parameters + """Lists all available options/parameters""" return self.run_script.list_all(), self.parameters.list_all() def get(self, param): @@ -60,11 +63,11 @@ def set_name(self, name): def set_directory(self, directory): self.directory = directory - def __is_a_parameter(self, name): + def _is_a_parameter(self, name): # Checks whether the parameters dictionary contains 'name' return ((name == 'Environment') or (name in self.parameters.list_all())) - def __is_a_run_script_option(self, name): + def _is_a_run_script_option(self, name): # Checks whether 'name' is an option in the run script return (name in self.run_script.list_all()) @@ -77,38 +80,44 @@ def write(self): ##-------------------------------------------------------------------------------------- class Parameters(): - # Holds all the parameters that ReSCAL needs to run + """Holds all the parameters that ReSCAL needs to run""" def __init__(self): self.parameters = {} self.parameter_descriptions = {} - self.__special_parameter_descriptions = {} - self.__set_special = {} - self.__default_header() - self.__default_parameters() + self._special_parameter_descriptions = {} + self._set_special = {} + self._default_header() + self._default_parameters() def new_parameter(self, name, description, default_value): - # New parameter - # Name should be a string (the parameter name expected by ReSCAL) - # Description should be a string describing its use or purpose etc - # Default value is the default value, generally a string or float + """ + New parameter + Name should be a string (the parameter name expected by ReSCAL) + Description should be a string describing its use or purpose etc + Default value is the default value, generally a string or float + """ self.parameters[name] = default_value self.parameter_descriptions[name] = description - def __special_parameter(self, name, description, setting_function): - # Special parameters are not stored. - # When set, they modify one or more other parameters in a way described by the setting_function() - self.__special_parameter_descriptions[name] = description - self.__set_special[name] = setting_function + def _special_parameter(self, name, description, setting_function): + """ + Special parameters are not stored. + When set, they modify one or more other parameters in a way described by the setting_function() + """ + self._special_parameter_descriptions[name] = description + self._set_special[name] = setting_function - def __default_header(self): - # Provides a basic description of this parameter set in form of a string + def _default_header(self): + """Provides a basic description of this parameter set in form of a string""" self.header_start = "Parameter file for ReSCAL written from Parameters utility" self.header_body = "Default parameters : sahara sand" - def __default_parameters(self): - # Default values for parameters - # Initialized here for sahara sand - # Basic model parameters and geometry of model run: + def _default_parameters(self): + """ + Default values for parameters + Initialized here for sahara sand + Basic model parameters and geometry of model run: + """ self.new_parameter('Model', 'Defines a set of transitions for grains in the cellular automaton e.g. DUN or SNO', 'SNO') self.new_parameter('Output_directory', 'Directory where output files go', './out') @@ -154,13 +163,15 @@ def __default_parameters(self): # Special parameters - set by same interface as others, # But are actually tools which modify one or more other parameters - self.__special_parameter('Environment', 'Sets all defaults for an environment, e.g. sand or snow', self.__environment) - self.__special_parameter('Csp_params', 'Sets parameters for a Csp_template', self.__update_template) - - def __environment(self, keyword): - # Function to set special 'Environment' parameter - #Update defaults fora different enviroment, e.g. snow - # (Could be added for subaqueous dunes, mars environment, etc) + self._special_parameter('Environment', 'Sets all defaults for an environment, e.g. sand or snow', self._environment) + self._special_parameter('Csp_params', 'Sets parameters for a Csp_template', self._update_template) + + def _environment(self, keyword): + """ + Function to set special 'Environment' parameter + Update defaults fora different enviroment, e.g. snow + (More environments could be added for subaqueous dunes, mars environment, etc) + """ if keyword == "snow": self.header_body = "Default values - Niwot Ridge snow" self.set({'Model' : 'SNO', @@ -168,10 +179,12 @@ def __environment(self, keyword): 'Ava_angle' : 38, 'Lambda_S' : 0.001}) - def __update_template(self, template_parameters): - # Function to set special 'Csp_params' parameter - # __update_template([20]) called on 'Csp_template = LAYER(10)' would change LAYER(10) to LAYER(20) - # __update_template([5,7]) called on 'Csp_template = FORSTEP(1,2)' would set Csp_template = FORSTEP(5,7) + def _update_template(self, template_parameters): + """ + Function to set special 'Csp_params' parameter + _update_template([20]) called on 'Csp_template = LAYER(10)' would change LAYER(10) to LAYER(20) + _update_template([5,7]) called on 'Csp_template = FORSTEP(1,2)' would set Csp_template = FORSTEP(5,7) + """ initial_template = self.get('Csp_template') base = initial_template.split('(',1)[0] new_template = base + "(" @@ -184,13 +197,15 @@ def __update_template(self, template_parameters): self.set({'Csp_template' : new_template}) def set(self, name_value_dict): - # Change the value of one or more parameters - # input as a dictionary {"Parameter name" : value} + """ + Change the value of one or more parameters + input as a dictionary {"Parameter name" : value} + """ for name in name_value_dict.keys(): # Paramters that can be overwritten by other parameters must go first - if name in self.__special_parameter_descriptions.keys(): - setting_function = self.__set_special[name] + if name in self._special_parameter_descriptions.keys(): + setting_function = self._set_special[name] setting_function(name_value_dict[name]) # Non-special parameters are independent. Order doesn't matter. elif name in self.parameters.keys(): @@ -202,12 +217,10 @@ def set(self, name_value_dict): # TODO, deal with all parameters and verify none are real_data/* def set_real_data_path(self, real_data_directory): - # sets path for 'Phys_prop_file' and 'Q_sat_file' + """sets path for 'Phys_prop_file' and 'Q_sat_file""" keys = ['Phys_prop_file','Qsat_file'] for key in keys: self.parameters[key] = os.path.join(real_data_directory, os.path.basename(self.parameters[key])) - - def get(self, name): return self.parameters[name] @@ -219,13 +232,15 @@ def get_description(self, name): return self.parameter_descriptions[name] def set_header(self, new_header): - # Give parameter file a useful descriptive header - # Write function will append one comment (##) symbol; additional lines - # must be commented appropriately. + """ + Give parameter file a useful descriptive header + Write function will append one comment (##) symbol; additional lines + must be commented appropriately. + """ self.header_body = new_header def read(self, filename): - #Read a parameter file into all parameters + """Read a parameter file into all parameters""" with open(filename, "r") as f: prev_line = "" for i, line in enumerate(f): @@ -261,7 +276,7 @@ def read(self, filename): def write(self, filename): - # Write all parameters to a parameter file + """Write all parameters to a parameter file""" with open(filename, "w") as f: f.write("## " + self.header_start + "\n") f.write("## " + self.header_body + "\n \n") @@ -274,22 +289,26 @@ def write(self, filename): ##---------------------------------------------------------------------------------------------------------- ##---------------------------------------------------------------------------------------------------------- -class Run_Script(): - # Creates a ReSCAL run script - # Yes, it's a python script that writes a bash script, and yes, that's a bit silly +class RunScript(): + """ + Creates a ReSCAL run script + Yes, it's a python script that writes a bash script. + """ def __init__(self): self.options = {} - self.__flag_options = {} - self.__default_options() - self.__default_header() + self._flag_options = {} + self._default_options() + self._default_header() - def __default_header(self): - self.header_start = "Script written with Run_Script utility (KK)" + def _default_header(self): + self.header_start = "Script written with RunScript utility (KK)" self.header_body = "Default options" - def __default_options(self): - # set default options - # ReSCAL lists a lot of command-line options in entry.c, show_general_options() + def _default_options(self): + """ + set default options + ReSCAL lists a lot of command-line options in entry.c, show_general_options() + """ self.options['clean'] = True self.options['backup'] = False self.options['parfile'] = "sno_cone.par" @@ -298,22 +317,22 @@ def __default_options(self): self.options['rescallocation'] = "../src" # automatically handle command line options here - self.__set_flag_option('usage info', 'h', True) - self.__set_flag_option('show params', 'hm', True) - self.__set_flag_option('no video', 'nv', True) - self.__set_flag_option('info interval', 'info', True) - self.__set_flag_option('output interval', 'dcsp', '10t0') - self.__set_flag_option('png interval', 'dpng', '10t0') - self.__set_flag_option('stop after', 'stop', False) - self.__set_flag_option('frame rate', 'fr', False) - self.__set_flag_option('random seed', 's', False) - self.__set_flag_option('vel', 'vel', True) - self.__set_flag_option('vss', 'vss', True) - self.__set_flag_option('quit', 'q', False) - self.__set_flag_option('alti only', 'altionly', False) - self.__set_flag_option('cellspace borders', 'csp_borders', False) - self.__set_flag_option('uncompressed cellspace', 'uncompressed_csp', False) - self.__set_flag_option('print performance', 'perf_print', False) + self._set_flag_option('usage info', 'h', True) + self._set_flag_option('show params', 'hm', True) + self._set_flag_option('no video', 'nv', True) + self._set_flag_option('info interval', 'info', True) + self._set_flag_option('output interval', 'dcsp', '10t0') + self._set_flag_option('png interval', 'dpng', '10t0') + self._set_flag_option('stop after', 'stop', False) + self._set_flag_option('frame rate', 'fr', False) + self._set_flag_option('random seed', 's', False) + self._set_flag_option('vel', 'vel', True) + self._set_flag_option('vss', 'vss', True) + self._set_flag_option('quit', 'q', False) + self._set_flag_option('alti only', 'altionly', False) + self._set_flag_option('cellspace borders', 'csp_borders', False) + self._set_flag_option('uncompressed cellspace', 'uncompressed_csp', False) + self._set_flag_option('print performance', 'perf_print', False) self.options['nice'] = False @@ -324,10 +343,12 @@ def __default_options(self): # genesis make one, will still use 'Dun.csp' as the link self.options['premade_csp'] = False - def __set_flag_option(self, descriptive_name, flag, value): - # Some options are command line flags. Some are not. - # Try to hide this bit of extra complexity from the user. - self.__flag_options[descriptive_name] = flag + def _set_flag_option(self, descriptive_name, flag, value): + """ + Some options are command line flags. Some are not. + Try to hide this bit of extra complexity from the user. + """ + self._flag_options[descriptive_name] = flag self.options[descriptive_name] = value def list_all(self): @@ -340,50 +361,53 @@ def set_header(self, header): self.header_body = header def set(self, option_dict): - # Takes a dictionary of {"option name" : value} pairs + """Takes a dictionary of {"option name" : value} pairs""" for option in option_dict.keys(): if option in self.options.keys(): self.options[option] = option_dict[option] else: print("Skipping nonexistent option " + option) - def __write_run_rescal(self, f): - # Sub-function of write() that writes the call to rescal - # with appropriate flags + def _write_run_rescal(self, f): + """ + Sub-function of write() that writes the call to rescal + with appropriate flags + """ f.write('# ----Rescal----\n') if self.options['nice']: f.write('nice ') f.write("./rescal $PAR_FILE") - for option in self.__flag_options.keys(): + for option in self._flag_options.keys(): if (self.options[option] == True): # -flag - f.write(" -" + self.__flag_options[option]) + f.write(" -" + self._flag_options[option]) elif self.options[option]: # == any value except False or True # -flag VALUE - f.write(" -" + str(self.__flag_options[option]) + " " + str(self.options[option])) + f.write(" -" + str(self._flag_options[option]) + " " + str(self.options[option])) f.write("\n \n") def rescal_call_args(self): - # give a list of all the args for the actual call to rescal + """Give a list of all the args for the actual call to rescal""" args = [] if self.options['nice']: nice_list.append('nice') - for option in self.__flag_options.keys(): + for option in self._flag_options.keys(): if (self.options[option] == True): # -flag - args.append("-" + self.__flag_options[option]) + args.append("-" + self._flag_options[option]) elif self.options[option]: # == any value except False or True # -flag VALUE - args.append("-" + str(self.__flag_options[option])) + args.append("-" + str(self._flag_options[option])) args.append(str(self.options[option])) return args def write(self, filename): + """Write a rescal run script from a RunScript object""" with open(filename, "w") as f: f.write("#!/bin/bash \n \n") f.write("################## \n ## ReSCAL run script ## \n################") @@ -430,16 +454,10 @@ def write(self, filename): # Run rescal - self.__write_run_rescal(f) + self._write_run_rescal(f) # make file executable os.chmod(filename, 0o764) - # Automatic analysis - - - - - ##-------------------------------------------------------------------------------------- @@ -452,12 +470,14 @@ def write(self, filename): # not just lists # TODO allow passing of arguments in dicts, but with no guaranteed ordering def all_parameter_combos(named_parameter_lists): - '''Takes a parameter list of lists of lists such as: + """ + Takes a parameter list of lists of lists such as: [['Coef_A', [0.1, 0.2, 0.3]], ['random seed', [1,2,3]]]) so that each sublist has the variable name and set of parameters to vary over. Creates a generator that returns a dictionary with each possible parameter combination and a string that can be used to identify the varying parameters. - If variable names have spaces they are replaced with underscores.''' + If variable names have spaces they are replaced with underscores. + """ # separate parameter names from values lists, cast all values to strings names = [x[0] for x in named_parameter_lists] @@ -481,13 +501,14 @@ def all_parameter_combos(named_parameter_lists): #### NOTE: set up for power-lab machine usage, meaning on a single PC, not a cluster def make_run_directories(fixed_params, variable_params, experiment_name, run_header, run_name): - '''Create a set of directories that contain all needed files for separate rescal runs. + """ + Create a set of directories that contain all needed files for separate rescal runs. The directories exist in a top level directory of experiment_name. Each directory is names based on its varying parameters. The paths to the run scripts are returned for easy execution on the - power-lab machines.''' + power-lab machines. + """ - #breakpoint() # make the top level directory, but don't overwrite a directory that # already exists experiment_directory_name = experiment_name @@ -505,7 +526,7 @@ def make_run_directories(fixed_params, variable_params, experiment_name, run_hea for current_variable_params in all_parameter_combos(variable_params): params_to_add, directory_suffix = current_variable_params parameters = {**fixed_params, **params_to_add} - this_run = Design_a_run() + this_run = DesignRun() #this_run.set_header(run_header) this_run.set_name(run_name) # create a directory for each run inside the experiment directory @@ -525,10 +546,12 @@ def make_run_directories(fixed_params, variable_params, experiment_name, run_hea #### NOTE: set up for power-lab machine usage, meaning on a single PC, not a cluster def run_rescals(run_scripts): - '''Takes a list of paths to .run scripts that should already be in directories set up + """ + Takes a list of paths to .run scripts that should already be in directories set up to run ReSCAL. An instance of ReSCAL is started using each run script and then the ReSCAL all run at the same time and asynchronously. This function waits for all the - child processes to complete.''' + child processes to complete. + """ # if any spaces in path names, turns ' ' into '\ ' so the shell can understand them modded_scripts = [] @@ -544,10 +567,11 @@ def run_rescals(run_scripts): p.wait() - -# given a .par file, returns a dictionary of parameters -# TODO, could be more flexible, but works for the auto-generated ones def par_to_dict(filename): + """ + given a .par file, returns a dictionary of parameters + TODO, could be more flexible, but works for the auto-generated ones + """ with open(filename, 'r') as f: data = f.read() @@ -555,8 +579,8 @@ def par_to_dict(filename): value_assignment = re.compile(r'([^#\n]*)[ ]*=[ ]*([^#\n]+)') return dict(re.findall(value_assignment, data)) -# given a rescal .run file, gets the command-line arguments for rescal def cmd_line_args(filename): + """given a rescal .run file, get the command-line arguments for rescal""" with open(filename, 'r') as f: data = f.read() # get the rescal line @@ -567,16 +591,18 @@ def cmd_line_args(filename): flag_value_pairs = flag_arg.findall(rescal_line.group(0)) return dict(flag_value_pairs) - -# given a top directory top_dir -# all of its subdirectories will be checked for files -# that match some the path_glob -# so any file of name top_dir/"any subdirectory of top_dir"/path_glob -# will match unless that file name matches some glob_exclude -# examples: -# for cellspace files path_glob='*.csp*' exclude_globs=['DUN.csp'] -# for ALTI files path_glob='ALTI*' exclude_globs=[] def get_files_to_process(top_dir, path_glob, exclude_globs): + """ + given a top directory top_dir + all of its subdirectories will be checked for files + that match some the path_glob + so any file of name top_dir/"any subdirectory of top_dir"/path_glob + will match unless that file name matches some glob_exclude + examples: + for cellspace files path_glob='*.csp*' exclude_globs=['DUN.csp'] + for ALTI files path_glob='ALTI*' exclude_globs=[] + """ + # get all the directories in top_directory (from stack overflow 973473) # make them absolute paths @@ -616,13 +642,8 @@ def get_files_to_process(top_dir, path_glob, exclude_globs): paths_truncated.append(p[:min_files_in_dir]) return paths_truncated - -# makes randoms initial states -# sets up runs directories to make initial states -# runs the simulations to get the initial states -# returns the file paths to the .csp files created def random_initial_states(num_states, parameters, top_dir, run_header='run', run_name='run'): - # create num_states random seeds + """create num_states random seeds""" seed_numbers = random.sample(range(1,1000000), num_states) seeds = [['random seed', seed_numbers]] From 6ec85fc5bb8c8113cfd4a30260de869e9e1ee40b Mon Sep 17 00:00:00 2001 From: Kelly Kochanski Date: Tue, 17 Sep 2019 18:33:06 -0600 Subject: [PATCH 29/83] Standardized docstrings in scripts/utilities --- docs/rescal-snow-tutorial.md | 7 +- scripts/utilities/cellspace.py | 118 +++++++++++------- scripts/utilities/datarun.py | 72 +++++++---- scripts/utilities/example_pyrescal.py | 6 +- scripts/utilities/heightmap.py | 113 ++++++++++------- .../param_space_exploration_example.py | 23 ++-- .../param_space_exploration_utilities.py | 77 +++++++----- scripts/utilities/rescal_utilities.py | 19 +-- scripts/utilities/scale_testing.py | 22 ++-- 9 files changed, 274 insertions(+), 183 deletions(-) diff --git a/docs/rescal-snow-tutorial.md b/docs/rescal-snow-tutorial.md index f8f2edb..a891750 100644 --- a/docs/rescal-snow-tutorial.md +++ b/docs/rescal-snow-tutorial.md @@ -76,10 +76,11 @@ This command will take a few minutes to run, and produces terminal output like: >> OMP_NUM_THREADS=1 ``` > *Nothing happening?* +> This is a good sign - if something is wrong, Rescal-snow almost always crashes in the first few seconds. This simulation may take several minutes to run, depending on the speed of your machine. > -> This is mostly a good sign - if something is wrong, rescal-snow almost always crashes in the first few seconds. The simulations, however, are computationally expensive, and may take an unreasonably long time to run on slower machines. -> If this is the case for you, we've put some tips for improving performance in [docs/performance_and_parallelization.md](performance_and_parallelization.md). -> The output from rescal-snow is saved at regular intervals. You can view intermediate output while the simulation is still running, and you can stop the simulation (usually `Ctrl-C`) without losing that output. +> *Still nothing happening?* +> In a separate terminal, look at the scripts directory (`ls scripts`). If the simulation has initiated successfully, you should see one or more files named `SNO0000X_t0.csp`, `genesis.log` and `rescal.log`. If you see these, the simulation is likely proceeding - slowly. You can stop the simulation whenever you see enough output for your purposes. +> We've put some tips for improving performance in [docs/performance_and_parallelization.md](performance_and_parallelization.md). **Example 1 results** diff --git a/scripts/utilities/cellspace.py b/scripts/utilities/cellspace.py index b8080ea..cd5a2ad 100755 --- a/scripts/utilities/cellspace.py +++ b/scripts/utilities/cellspace.py @@ -1,11 +1,11 @@ -__doc__ = '''Utilities to read, write, modify, and visualize rescal-snow cell spaces.''' +__doc__ = """Utilities to read, write, modify, and visualize rescal-snow cell spaces.""" __author__ = 'Gian-Carlo DeFazio' __date__ = 'August 16 2019' -import matplotlib import sys import os -# Matplotlib will fail if no display is available (e.g. many high-performance computing environments) +import matplotlib +# Matplotlib will fail if no display is available (as in many high-performance computing environments) if bool(os.environ.get('DISPLAY', None)) == False: matplotlib.use('Agg') import matplotlib.pyplot as plt @@ -14,7 +14,6 @@ import random import gzip import scipy.ndimage -import random import heightmap @@ -52,9 +51,11 @@ def in_bounds(base, overlay, position): - '''Evaluates if overlay can be placed onto base at + """ + Evaluates if overlay can be placed onto base at position. position is the coordinates of base on which the top left - corner of overlay is placed.''' + corner of overlay is placed. + """ # verify that the dimensions match if base.ndim != len(position): return False @@ -81,7 +82,9 @@ def in_bounds(base, overlay, position): def non_border(a): - '''Get a slice of a that excludes border cells.''' + """ + Get a slice of a 1D array that excludes border cells. + """ # the stuff we care about has states 0,1,2,3 valid = np.nonzero(a < 4)[0] return a[valid[0]: valid[-1]+1] @@ -89,7 +92,7 @@ def non_border(a): # replaced with find_air_or_mobile def surface_position(a): - '''find index of first solid sand starting from the top.''' + """find index of first solid sand starting from the top.""" sand_indices = np.nonzero(a == 0)[0] if sand_indices.size > 0: return sand_indices[0] @@ -112,8 +115,10 @@ def find_air_or_mobile(column): def shift_fill(a, shift, fill=0): - '''Shift an array to the right by shift and fill in with fill value. - If shift value is negative, the shift will be to the left.''' + """ + Shift an array to the right by shift and fill in with fill value. + If shift value is negative, the shift will be to the left. + """ # nothing to do if shift == 0: pass @@ -130,9 +135,11 @@ def shift_fill(a, shift, fill=0): def change_surface_level(column, delta): - '''Given a column in the 3D cellspace, modify the sand height by delta. + """ + Given a column in the 3D cellspace, modify the sand height by delta. Clip at the boundaries of the space. Try to keep mobile sand by moving it with - the surface.''' + the surface. + """ # if nothing to do, do nothing if delta == 0: @@ -164,13 +171,15 @@ def change_surface_level(column, delta): class CellSpace: - '''A snow-rescal cell space representation. This class deals with the .csp files + """ + A snow-rescal cell space representation. This class deals with the .csp files made by rescal and genesis. The .csp files contain a header followed by the 3D space - of cells as a 1D array.''' + of cells as a 1D array. + """ - def __init__(self, filename): - '''read in a .csp or .csp.gz file and create a CellSpace instance + """ + read in a .csp or .csp.gz file and create a CellSpace instance to represent the file contents. filename can also be a bytearray object that contains the contents of a .csp file. @@ -193,7 +202,8 @@ def __init__(self, filename): output_file: the default output file name to write to height_map: a heightmap.HeightMap instance with the height data - dims_2d: the dimensions of the corresponding height map''' + dims_2d: the dimensions of the corresponding height map + """ # determine if data is in a file or is already bytes if isinstance(filename, bytes): @@ -214,7 +224,7 @@ def __init__(self, filename): def _get_cell_data_type(self): - '''get correct data type depending on cell size''' + """get correct data type depending on cell size""" data_type = None if self.cell_size == 8: data_type = np.uint64 @@ -230,15 +240,17 @@ def _get_cell_data_type(self): def dims_2d(self): - '''Get the dimensions of a height map for cell.''' + """Get the dimensions of a height map for cell.""" d, _, l = self.cells.shape return d,l def _read(self, bs=None): - '''read in the file contents and store the data in a ndarray. + """ + read in the file contents and store the data in a ndarray. store the header both as python variables, but also in the original binary - form from the input file.''' + form from the input file. + """ if bs is None: f = None @@ -279,7 +291,8 @@ def _read(self, bs=None): # TODO deal with 'TIME' # TODO should all the chunk size checks be 12? I think not. def _read_header(self, bs): - '''Read the .csp header and store the pertinent values + """ + Read the .csp header and store the pertinent values The parts of the header that are used are organized as follows: @@ -328,7 +341,8 @@ def _read_header(self, bs): [8-11] i the height H <> [12-15] i the length L <> [16-19] i the depth D <> - [20-23] i flag to say if thses values should be used. 1 if yes, 0 if no.''' + [20-23] i flag to say if thses values should be used. 1 if yes, 0 if no. + """ b0_19 = 'B3s2scci4si' model_chunk = 'i4s3sB' @@ -401,8 +415,10 @@ def _read_header(self, bs): def _overwrite_lsbs(self): - '''creates cells that are identical to those read in (self.cells_original) except - for the lsb which is rewritten with the values in self.cells.''' + """ + creates cells that are identical to those read in (self.cells_original) except + for the lsb which is rewritten with the values in self.cells. + """ # expand bytes to type read in from the input file bytes_expanded = self.cells.astype(self.cells_original.dtype) mask = np.array([0xffffffffffffff00]).astype(self.cells_original.dtype) @@ -411,14 +427,15 @@ def _overwrite_lsbs(self): def restore_original_cells(self): - '''restore self.cells to its orginal value.''' + """restore self.cells to its orginal value.""" self.cells = self.cells_original.astype(np.uint8) # writes a .csp file # if no filename is given, the input file name is used def write(self, filename=None, compressed=False): - ''' write the CellSpace to a file in the .csp format + """ + write the CellSpace to a file in the .csp format keyword arguments: filename -- the name of the file to write to. @@ -447,7 +464,8 @@ def write(self, filename=None, compressed=False): compressed=True will write to a file that has the same name as the input but with '.gz' added. 'input.csp' is not overwritten and 'input.csp.gz' is written or overwritten. - c.write(compressed=True)''' + c.write(compressed=True) + """ if filename is None: if self.output_file is None: @@ -470,8 +488,8 @@ def write(self, filename=None, compressed=False): self._overwrite_lsbs().tofile(f) - # checks if a point is in the cell space def _in_cell_space(self, point): + """checks if a point is in the cell space""" if len(point) != self.cells.ndim: return False for i, dim in zip(point, self.cells.shape): @@ -480,17 +498,19 @@ def _in_cell_space(self, point): return True - # takes in csp column and makes a height map - # find the first location of an air cell def _find_air(self, column): + """ + takes in csp column and makes a height map + find the first location of an air cell + """ air_indices = np.where(column == 3)[0] if air_indices.size > 0: return air_indices[-1] else: return np.array([0]) - # takes in csp column and makes a height map def _find_air_or_mobile(self, column): + """takes in csp column and makes a height map""" air_indices = np.nonzero(column == 3)[0] mobile_sand_indices = np.nonzero(column == 1)[0] @@ -504,17 +524,19 @@ def _find_air_or_mobile(self, column): return 0 - # creates a surface map - # like an inverted and offset heightmap, gives the positions - # of the air cells at the surface of the sand - # really it is just the air cell in each column with the highest - # index (and idices start at the physical top) def make_surface_map(self): + """ + creates a surface map + like an inverted and offset heightmap, gives the positions + of the air cells at the surface of the sand + really it is just the air cell in each column with the highest + index (and idices start at the physical top) + """ self.surface_map = np.apply_along_axis(self._find_air_or_mobile, 1, self.cells) - # make a HeightMap object def make_height_map(self): + """make a HeightMap object""" self.make_surface_map() height_map = self.cells.shape[1] - 1 - self.surface_map self.height_map = heightmap.HeightMap(height_map) @@ -525,15 +547,15 @@ def make_height_map(self): ######################################## - # add sand grain at (depth, surface_map[depth, length], length)] def add_sand(self, depth, length): + """add sand grain at (depth, surface_map[depth, length], length)]""" # get surface map or immobile sand sm = self.surface_map height = sm[depth, length] self.cells[depth, height, length] = cell_types['grain'] - # adds a randomly placed grain of sand to the surface def add_sand_random(self): + """adds a randomly placed grain of sand to the surface""" d, _, l = self.cells.shape depth = random.randint(0,d) length = random.randint(0,l) @@ -541,7 +563,7 @@ def add_sand_random(self): def add_height_map(self, height_map, top_left_corner=(0,0)): - # verify that the height_map can be placed at top_left + """verify that the height_map can be placed at top_left""" if not in_bounds(self.cells[:,0,:], height_map, top_left_corner): # TODO raise an exception, bad input return @@ -559,15 +581,17 @@ def add_height_map(self, height_map, top_left_corner=(0,0)): def add_height(self, height): - '''Raise the entire surface level by height. - If height is negative surface level will lower.''' + """ + Raise the entire surface level by height. + If height is negative surface level will lower. + """ # create heightmap of height h = np.full(self.dims_2d, height) self.add_height_map(h) def add_sinusoid(self, amplitude=5, frequency=10, phase=0, wind_direction=True): - '''Superimposes a sinusoidal wave onto the surface of the cell space.''' + """Superimposes a sinusoidal wave onto the surface of the cell space.""" # create a 2D heightmap that will be superimposed onto the surface sinusoid_height_map = heightmap.make_sinusoid(amplitude, frequency, self.dims_2d, phase=phase) self.add_height_map(sinusoid_height_map) @@ -581,20 +605,20 @@ def add_sinusoid(self, amplitude=5, frequency=10, phase=0, wind_direction=True): def draw_height_map(self): - '''updates and draws height_map''' + """updates and draws height_map""" self.make_height_map() self.height_map.draw() def draw_surface_map(self): - '''updates and draws surface_map''' + """updates and draws surface_map""" self.make_surface_map() plt.imshow(self.surface_map.astype(np.float32)) plt.colorbar() plt.show() def draw_fft_blur(self): - '''updates and draws the fft of the height_map''' + """updates and draws the fft of the height_map""" self.make_height_map() self.height_map.draw_fft_blur() diff --git a/scripts/utilities/datarun.py b/scripts/utilities/datarun.py index 8118dae..825422e 100755 --- a/scripts/utilities/datarun.py +++ b/scripts/utilities/datarun.py @@ -1,11 +1,11 @@ -__author__ = '''Gian-Carlo DeFazio''' +__author__ = """Gian-Carlo DeFazio""" -__doc__ = r'''A python interface to ReSCAL. A DataRun object takes in the -parameters and meta-parameters required to run ReSCAL. The DataRun can receive and process -the output of ReSCAL while ReSCAL is running. -To run ReSCAL using a DataRun instance, the environment variable RESCAL_SNOW_ROOT -should be defined and be the path of a ReSCAL installation. Also, a directory -for the output should be created. The default is RESCAL_SNOW_ROOT/data_runs.''' +__doc__ = r"""A python interface to Rescal-snow. A DataRun object takes in the +parameters and meta-parameters required to run Rescal-snow. The DataRun can receive and process +the output of Rescal-snow while Rescal-snow is running. +To run Rescal-snow using a DataRun instance, the environment variable RESCAL_SNOW_ROOT +should be defined and be the path of a Rescal-snow installation. Also, a directory +for the output should be created. The default is RESCAL_SNOW_ROOT/data_runs.""" import os import sys @@ -18,8 +18,10 @@ def find_rescal_root(filename=None): - '''Tries to find RESCAL_SNOW_ROOT in the environment - and make it into an absolute path.''' + """ + Tries to find RESCAL_SNOW_ROOT in the environment + and make it into an absolute path. + """ if filename is None: if 'RESCAL_SNOW_ROOT' in os.environ: return os.path.expanduser(os.environ['RESCAL_SNOW_ROOT']) @@ -35,13 +37,16 @@ def find_rescal_root(filename=None): class DataRun: - '''Run ReSCAL with the option to receive and process the output - while ReSCAL is running. Save the processed output to a file.''' + """ + Run ReSCAL with the option to receive and process the output + while ReSCAL is running. Save the processed output to a file. + """ def __init__(self, parameters, experiment_directory, experiment_parent_directory='data_runs', rescal_root=None, keep_height_maps=True, keep_ffts=True): - '''Collect and process the parameters for running ReSCAL and + """ + Collect and process the parameters for running ReSCAL and processing its output. Set up the data structures to store ReSCAL outout. Determine where the executables and configuration files are or should be. For this initialization to work, the environment variable RESCAL_SNOW_ROOT @@ -79,7 +84,8 @@ def __init__(self, parameters, experiment_directory, keep_ffts -- will keep and write out the fft blur data created by processing cell space outputs from ReSCAL. - (default True)''' + (default True) + """ # set self.rescal_root using the environment or rescal_root argument # should be the parent directory of the ReSCAL src and scripts directories @@ -138,8 +144,10 @@ def __init__(self, parameters, experiment_directory, def check_paths(self): - '''Verify that the files and directories that should already exist - actually do exist.''' + """ + Verify that the files and directories that should already exist + actually do exist. + """ dirs = [self.rescal_root, self.scripts_directory, self.real_data_directory, self.experiment_parent_directory, @@ -157,8 +165,10 @@ def check_paths(self): def __str__(self): - '''A very generic __str__ that just gets everythiing that's not a built-in - or a method.''' + """ + A very generic __str__ that just gets everythiing that's not a built-in + or a method. + """ # get the attributes that matter # from stack-exchange # https://stackoverflow.com/questions/11637293/iterate-over-object-attributes-in-python @@ -170,9 +180,11 @@ def __str__(self): def setup(self): - '''Create the experiment directory and the .par file. Create the .csp input + """ + Create the experiment directory and the .par file. Create the .csp input using genesis if neccesary. Deal with the file path to real_data. - Get the args for the call to rescal.''' + Get the args for the call to rescal. + """ # some files and directories should alreay exist self.check_paths() @@ -203,7 +215,7 @@ def setup(self): self.parameters['Output_directory'] = os.path.join(self.experiment_directory, 'out') # create a run with the given parameters - design = rescal_utilities.Design_a_run() + design = rescal_utilities.DesignRun() design.set_parameters(self.parameters) # find file paths that are in the real data folder and fix them @@ -233,10 +245,12 @@ def setup(self): def receive_process_data(self): - '''Get the data size, which will be in a 4 byte integer. + """ + Get the data size, which will be in a 4 byte integer. Get the data itself. Create a cellspace.CellSpace to process the data and keep the height_maps and ffts - based on flags.''' + based on flags. + """ # either block because there's nothing to read, # read the next .csp, @@ -257,19 +271,23 @@ def receive_process_data(self): def write_meta_data(self): - '''Write the rescal parameters and execuation call to a file - in the experiment directory.''' + """ + Write the rescal parameters and execuation call to a file + in the experiment directory. + """ with open(self.meta_data, 'w+') as f: f.write('parameters = ' + str(self.parameters) + '\n') f.write('exec = ' + str(self.rescal_args) + '\n') def run_simulation(self): - '''Run ReSCAL and get the cellspace data + """ + Run ReSCAL and get the cellspace data that would otherwise be written to a file. Process and save the data to files and write out the meta-data. A new file descriptor is used, as opposed to just redirecting the stdot of ReSCAL, because the stdout - of ReSCAL is full of text output that this function doesn't deal with.''' + of ReSCAL is full of text output that this function doesn't deal with. + """ # setup pipe to rescal r,w = os.pipe() @@ -316,7 +334,7 @@ def run_simulation(self): def run_without_piping(self): - '''Do a rescal run that saves data to files like normal.''' + """Do a rescal run that saves data to files like normal.""" rescal = subprocess.Popen(self.rescal_args, cwd=self.experiment_directory, stdout=subprocess.DEVNULL) diff --git a/scripts/utilities/example_pyrescal.py b/scripts/utilities/example_pyrescal.py index 44c0471..874f10c 100755 --- a/scripts/utilities/example_pyrescal.py +++ b/scripts/utilities/example_pyrescal.py @@ -1,8 +1,8 @@ #!/usr/bin/env python3 -__author__ = '''Gian-Carlo DeFazio''' -__doc__ = '''This example is meant to test functionality -on slurm. This script can be called indirectly using sbatch.''' +__author__ = """Gian-Carlo DeFazio""" +__doc__ = """This example is meant to test functionality of datarun.py +on slurm. This script can be called indirectly using sbatch.""" import datarun diff --git a/scripts/utilities/heightmap.py b/scripts/utilities/heightmap.py index b295808..ecbbb55 100644 --- a/scripts/utilities/heightmap.py +++ b/scripts/utilities/heightmap.py @@ -1,23 +1,20 @@ -__doc__ = '''Utilities to read and visualize rescal-snow height maps.''' +__doc__ = """Utilities to read and visualize rescal-snow height maps.""" __author__ = 'Gian-Carlo DeFazio' __date__ = '16 August 2019' +import sys +import os import math import numpy as np import scipy.ndimage import matplotlib -import sys -import os # Matplotlib will fail if no display is available (e.g. many high-performance computing environments) if bool(os.environ.get('DISPLAY', None)) == False: matplotlib.use('Agg') - import matplotlib.pyplot as plt from matplotlib import cm from mpl_toolkits.mplot3d import Axes3D - - # space invader height map invader_template = np.array([[0,0,1,0,0,0,0,0,1,0,0], [0,0,0,1,0,0,0,1,0,0,0], @@ -30,10 +27,18 @@ def gaussian_hill(amplitude, sigma, height_padding, width_padding): - '''Creates a guassian heightmap. The center of the guassian + """ + Creates a guassian heightmap. The center of the guassian will have a value of amplitude. sigma can be either a scaler or a 2-tuple. The padding determines the size of the array returned. - The size is (2*height_padding+1, 2*width_padding+1)''' + The size is (2*height_padding+1, 2*width_padding+1) + + Inputs: + - amplitude: height in cells of gaussian hills at center (highest point) + - sigma: width (at standard deviation) of hills. + may be scalar (symmetric hills) or 2-tuple (asymmetric) + - height_padding, width_padding: determine size of array returned + """ # does it the cheap way: # makes an impulse, meaning a 1 in the middle and 0 otherwise, @@ -48,13 +53,22 @@ def gaussian_hill(amplitude, sigma, height_padding, width_padding): def make_sinusoid(height, frequency, dims, phase=0, wind_direction=True, no_negative=False): - '''Create a sinusoid on a 2D plane that has dimensions dims. + """ + Create a sinusoid on a 2D plane that has dimensions dims. Does an inverse Fourier transform and discretizes. The wave is resized so that its height ranges from 0 to height. The frequency is relative to the space. If the frequency is x, wave will complete x cycles across the space. If wind_direction is True, then the wave heights will vary in the horizontal direction, otherwise they will vary in the - vertical direction.''' + vertical direction. + + Inputs: + - height: wave ranges from 0 to height + - dims: dimensions of array + - wind_direction: boolean, if True wave varies in horizontal, if False in vertical + - no_negative: disallow negative heights, returning zeros as minimum + + """ # create a 2D array of the same size as the dims grid = np.zeros(dims, dtype=np.complex) @@ -81,17 +95,27 @@ def make_sinusoid(height, frequency, dims, phase=0, wind_direction=True, no_nega def scale(height_map, amplitude=1, vertical=1, horizontal=1): - '''Scales a height map. The heigh map dimensions are scaled in the + """ + Scales a height map. The heigh map dimensions are scaled in the horizontal and vertical directions. The values are then scaled by a factor - of amplitude.''' + of amplitude. + + Inputs: + - height_map + - amplitude: scale factor for stretching height map + - vertical, horizontal: relative scale factors in horizontal and vertical dimensions + """ return np.kron(height_map, np.full((vertical, horizontal), amplitude)) def fft2d_analyze(data): - '''This function should be imported from analysis + """ + This function should be imported from analysis performs fft2d analysis on the data taken from input file and returns single quadrant fft result. - data -> data to perform fft on''' + + data -> data to perform fft on + """ #Data points for x and y axis dpx, dpy = data.shape @@ -125,9 +149,11 @@ def fft2d_analyze_map_pic(data): def fft2d_crop_blur(image): - '''gets fft2d (which drops all but top left quadrant) + """ + gets fft2d (which drops all but top left quadrant) grabs a small piece on the top left - apply gaussian blur''' + apply gaussian blur + """ # get just the magnitudes f_image = image.astype(np.float32) @@ -141,7 +167,7 @@ def fft2d_crop_blur(image): def fft2d_center_blur(image): - '''make pics with fft stuff in the middle''' + """make pics with fft stuff in the middle""" # get just the magnitudes fft2d = np.absolute(fft2d_analyze_map_pic(image)) @@ -151,6 +177,7 @@ def fft2d_center_blur(image): def make_surface(height_map): + """Plot and return a height map as a 3D surface using matplotlib.pyplot.plot_surface, plasma colors""" # get indices x,y = height_map.shape xs = list(range(x)) @@ -166,17 +193,16 @@ def make_surface(height_map): linewidth=0, antialiased=False) -def draw(height_map): - '''draw a simple color_map of height_map. - height_map is a 2d numpy.ndarray, not a HeightMap.''' - plt.imshow(height_map) +def draw(a): + """draw a simple color_map of an array""" + plt.imshow(a) plt.colorbar() plt.show() -# from the matplotlib tutorials -def plot_3d(height_map): - surf = make_surface(height_map) +def plot_3d(a): + """draw and show a 3D surface of from a 2D array of heights""" + surf = make_surface(a) plt.show() @@ -184,9 +210,11 @@ class HeightMap: # TODO should maybe do a try catch def __init__(self, height_input): - '''expect the heightmap files from rescal - to be 2D arrays of ints in text form''' - + """ + Input + - height_input, a rescal elevation array (a 2D array of integers) + or a filename pointing to such an array in a text file + """ # case that a filename is given if type(height_input) == str: self.input_file = height_input @@ -204,10 +232,12 @@ def __init__(self, height_input): self.make_summary_data() - # draw height map - # draw fft - # say the summary data def display_summary(self): + """ + Create plot of height map, + its fourier transform, + and summary data + """ fig, axs = plt.subplots(nrows=2, ncols=1) axs[0].pcolormesh(self.height_map) axs[1].pcolormesh(self.fft_blur) @@ -222,13 +252,12 @@ def display_summary(self): plt.show() - # write out the height_map - # default should be in the same form as ReSCAL - # can also write to .npy def write(self, filename=None, npy=False): - ''' write out the height_map + """ + write out the height_map default should be in the same form as ReSCAL - can also write to .npy''' + can also write to .npy + """ if filename is None: if self.output_file is None: @@ -244,7 +273,7 @@ def write(self, filename=None, npy=False): def save_as_pdf(self, filename, in_3d=False): - '''make a figure''' + """Save a HeightMap figure""" plt.xticks([]) plt.yticks([]) @@ -257,19 +286,19 @@ def save_as_pdf(self, filename, in_3d=False): def draw(self): - '''draw a simple color_map of height_map''' + """draw a simple color_map of height_map""" plt.imshow(self.height_map) plt.colorbar() plt.show() def make_fft_blur(self): - '''makes a blurred 2D fft of the height_map''' + """makes a blurred 2D fft of the height_map""" return fft2d_crop_blur(self.height_map.astype(np.float32)) def draw_fft_blur(self, in_3d=False): - '''draw simple color map of fft_blur''' + """draw simple color map of fft_blur""" if not in_3d: plt.imshow(self.fft_blur) plt.colorbar() @@ -279,7 +308,7 @@ def draw_fft_blur(self, in_3d=False): def save_fft_blur(self, filename, in_3d=False): - '''save fftblur to file''' + """save fftblur to file""" if not in_3d: plt.imshow(self.fft_blur) else: @@ -288,7 +317,7 @@ def save_fft_blur(self, filename, in_3d=False): def draw_fft_center(self, in_3d=False): - '''draw simple color map of fft_blur''' + """draw simple color map of fft_blur""" if not in_3d: plt.imshow(self.fft_center) plt.colorbar() @@ -298,7 +327,7 @@ def draw_fft_center(self, in_3d=False): def make_summary_data(self): - '''get some basic analysis metrics''' + """get some basic analysis metrics""" hm = self.height_map.astype(np.float32) self.average_height = hm.mean() self.min_height = hm.min() diff --git a/scripts/utilities/param_space_exploration_example.py b/scripts/utilities/param_space_exploration_example.py index 13ea240..754b3d0 100644 --- a/scripts/utilities/param_space_exploration_example.py +++ b/scripts/utilities/param_space_exploration_example.py @@ -1,17 +1,20 @@ -from rescal_utilities import * +import rescal_utilities import os import shutil -# Kelly Kochanski and Adam Rubin, 2018 -# This is an example file showing how to run a parameter space exploration -# The exploration fixes most simluations parameters (the `parameters' dictionary') -# then explores five snowfall rates, controlled by parameter Lambda_I, -# six wind speeds, controlled by parameter Tau_min, -# and all combinations thereof. +__author__ = "Kelly Kochanski and Adam Rubin" -# The script creates new directories and manages the locations of input, output and executable files -# so that all 30 simulations can be run in parallel. +__date__ = "2018" + +__doc__ = r"""This is an example file showing how to run a parameter space exploration + The exploration fixes most simluations parameters (the `parameters' dictionary') + then explores five snowfall rates, controlled by parameter Lambda_I, + six wind speeds, controlled by parameter Tau_min, + and all combinations thereof. + The script creates new directories and manages the locations of input, output and executable files + so that all 30 simulations can be run in parallel. +""" executable_location = ".." # location of the compiled rescal executable @@ -60,7 +63,7 @@ # These for loops vary the parameters for snowfall rate and wind speed for Lambda_I in [0.001, 0.01] : for Tau_min in [0, 100, 200, 300, 1000] : - this_run = Design_a_run() + this_run = rescal_utilities.DesignRun() this_run.set_header("Baseline Lambda_I values at a specified tau_min") this_run.set_name("run") # Where should the input for this single run go? diff --git a/scripts/utilities/param_space_exploration_utilities.py b/scripts/utilities/param_space_exploration_utilities.py index d6416a2..c1d5a01 100755 --- a/scripts/utilities/param_space_exploration_utilities.py +++ b/scripts/utilities/param_space_exploration_utilities.py @@ -1,34 +1,40 @@ -# KK July 03 2018 +__author__ = "K Kochanski" -# This is a shell script designed to start organizing ReSCAL to perform a parameter space exploration; -# it could be adapted to perform any set of runs with variable parameters +__date__ = "July 03 2018" -# The "explore_parameter_space" function creates an array of subdirectories, each containing: -# - a run script (bash), generally called run.run -# - a parameter file (txt), generally caled run.par -# Note that the multi-directory structure is useful for several reasons: -# 1. The output for each run stays in its own subdirectory, attached to the appropriate input files -# 2. If multiple processors are available, they may simultaneously run separate instances of rescal-snow, one per directory, -# without any communication, race conditions, or other problems +__doc__ = r"""This is a shell script designed to start organizing ReSCAL to perform a parameter space exploration; + it could be adapted to perform any set of runs with variable parameters + + The "explore_parameter_space" function creates an array of subdirectories, each containing: + - a run script (bash), generally called run.run + - a parameter file (txt), generally caled run.par + Note that the multi-directory structure is useful for several reasons: + 1. The output for each run stays in its own subdirectory, attached to the appropriate input files + 2. If multiple processors are available, they may simultaneously run separate instances of rescal-snow, one per directory, + without any communication, race conditions, or other problems +""" # Set up a bunch of runs to go in parallel +import os import numpy as np import datetime -import os import itertools import subprocess import glob + import rescal_utilities def explore_parameter_space(output_root, executable_location, parameter_ranges, fixed_parameters, n_runs): - # Take in a dictionary of parameter ranges to explore, - # e.g. { 'Lambda_S' : [0.001, 0.2], - # 'Lambda_F' : [3, 10] } + """ + Take in a dictionary of parameter ranges to explore, + e.g. { 'Lambda_S' : [0.001, 0.2], + 'Lambda_F' : [3, 10] } - # Setup n_runs runs to explore those, under directory output_ro - # Rescal and genesis executables are located in directory executable_location + Setup n_runs runs to explore those, under directory output_ro + Rescal and genesis executables are located in directory executable_location + """ if ( os.path.isdir(output_root) == False): os.mkdir(output_root) @@ -49,7 +55,7 @@ def explore_parameter_space(output_root, executable_location, parameter_ranges, while os.path.isdir(run_output_dir): run_output_dir += "A" - this_run = rescal_utilities.Design_a_run() + this_run = rescal_utilities.DesignRun() this_run.set_parameters(parameter_combos[run]) this_run.set_parameters({'rescallocation' : executable_location, 'parfile': 'run.par'}) @@ -60,7 +66,7 @@ def explore_parameter_space(output_root, executable_location, parameter_ranges, this_run.write() def _uniform_random_search(parameter_ranges, n_runs): - # For each run, each parameter takes a value drawn from a uniform distribution + """For each run, each parameter takes a value drawn from a uniform distribution""" parameter_combinations = [] @@ -84,12 +90,13 @@ def _uniform_random_search(parameter_ranges, n_runs): # not just lists # TODO allow passing of arguments in dicts, but with no guaranteed ordering def all_parameter_combos(named_parameter_lists): - '''Takes a parameter list of lists of lists such as: + """Takes a parameter list of lists of lists such as: [['Coef_A', [0.1, 0.2, 0.3]], ['random seed', [1,2,3]]]) so that each sublist has the variable name and set of parameters to vary over. Creates a generator that returns a dictionary with each possible parameter combination and a string that can be used to identify the varying parameters. - If variable names have spaces they are replaced with underscores.''' + If variable names have spaces they are replaced with underscores. + """ # separate parameter names from values lists, cast all values to strings names = [x[0] for x in named_parameter_lists] @@ -115,11 +122,13 @@ def all_parameter_combos(named_parameter_lists): #### NOTE: set up for power-lab machine usage, meaning on a single PC, not a cluster def make_run_directories(fixed_params, variable_params, experiment_name, run_header, run_name): - '''Create a set of directories that contain all needed files for separate rescal runs. + """ + Create a set of directories that contain all needed files for separate rescal runs. The directories exist in a top level directory of experiment_name. Each directory is names based on its varying parameters. The paths to the run scripts are returned for easy execution on the - power-lab machines.''' + power-lab machines. + """ # make the top level directory, but don't overwrite a directory that # already exists @@ -160,8 +169,10 @@ def make_run_directories(fixed_params, variable_params, experiment_name, run_hea #### NOTE: set up for power-lab machine usage, meaning on a single PC, not a cluster def run_rescals(run_scripts): - '''Takes path to a set of run_scripts that should be in the proper locations - to run rescal and runs each of them. Runs should be asynchronous.''' + """ + Takes path to a set of run_scripts that should be in the proper locations + to run rescal and runs each of them. Runs should be asynchronous. + """ # if any spaces in path names, turns ' ' into '\ ' so the shell can understand them modded_scripts = [] @@ -177,16 +188,18 @@ def run_rescals(run_scripts): p.wait() -# given a top directory top_dir -# all of its subdirectories will be checked for files -# that match some the path_glob -# so any file of name top_dir/"any subdirectory of top_dir"/path_glob -# will match unless that file name matches some glob_exclude -# examples: -# for cellspace files path_glob='*.csp*' exclude_globs=['DUN.csp'] -# for ALTI files path_glob='ALTI*' exclude_globs=[] # TODO, 2 copies of this function, the other in param_space_exploration_utilities.py def get_files_to_process(top_dir, path_glob, exclude_globs): + """ + given a top directory top_dir + all of its subdirectories will be checked for files + that match some the path_glob + so any file of name top_dir/"any subdirectory of top_dir"/path_glob + will match unless that file name matches some glob_exclude + examples: + for cellspace files path_glob='*.csp*' exclude_globs=['DUN.csp'] + for ALTI files path_glob='ALTI*' exclude_globs=[] + """ # get all the directories in top_directory (from stack overflow 973473) # make them absolute paths diff --git a/scripts/utilities/rescal_utilities.py b/scripts/utilities/rescal_utilities.py index efef607..9f8c450 100644 --- a/scripts/utilities/rescal_utilities.py +++ b/scripts/utilities/rescal_utilities.py @@ -1,9 +1,11 @@ -# KK Jun 25 20180 -# Utilities to set up run scripts quickly and easily; these tools are designed to aid parameter space -# explorations, sensitivity analyses, and large batches of runs. -# Parameters : Class to hold, update, change, or write all the parameters that ReSCAL needs to run -# RunScript : Class to hold, update, change, or write a ReSCAL run script with appropriate flags -# This includes almost all options and inputs, except those in the "real_data" file. +___author__ = "Kelly Kochanski" +__date__ = "Jun 25 2018" +__doc__ = r"""Utilities to set up run scripts quickly and easily; these tools are designed to aid parameter space + explorations, sensitivity analyses, and large batches of runs. + Parameters : Class to hold, update, change, or write all the parameters that ReSCAL needs to run + RunScript : Class to hold, update, change, or write a ReSCAL run script with appropriate flags + This includes almost all options and inputs, except those in the "real_data" file. +""" import os import re @@ -64,14 +66,15 @@ def set_directory(self, directory): self.directory = directory def _is_a_parameter(self, name): - # Checks whether the parameters dictionary contains 'name' + """Checks whether the parameters dictionary contains 'name'""" return ((name == 'Environment') or (name in self.parameters.list_all())) def _is_a_run_script_option(self, name): - # Checks whether 'name' is an option in the run script + """Checks whether 'name' is an option in the run script""" return (name in self.run_script.list_all()) def write(self): + """Write a .run run script and a .par parameter file""" self.run_script.write(self.directory + "/" + self.name + ".run") self.parameters.write(self.directory + "/" + self.name + ".par") diff --git a/scripts/utilities/scale_testing.py b/scripts/utilities/scale_testing.py index c23f94f..7a41084 100644 --- a/scripts/utilities/scale_testing.py +++ b/scripts/utilities/scale_testing.py @@ -2,17 +2,17 @@ import os import shutil -# Kelly Kochanski and Adam Rubin, 2018 - -# This is an example file showing how to run a parameter space exploration -# The exploration fixes most simluations parameters (the `parameters' dictionary') -# then explores five snowfall rates, controlled by parameter Lambda_I, -# six wind speeds, controlled by parameter Tau_min, -# and all combinations thereof. - -# The script creates new directories and manages the locations of input, output and executable files -# so that all 30 simulations can be run in parallel. +__author__ = "Kelly Kochanski and Adam Rubin" +__date__ = "2018" +__doc__ = r"""This is an example file showing how to run a parameter space exploration on multiple cores + The exploration fixes most simluations parameters (the `parameters' dictionary') + then explores five snowfall rates, controlled by parameter Lambda_I, + six wind speeds, controlled by parameter Tau_min, + and all combinations thereof. + The script creates new directories and manages the locations of input, output and executable files + so that all 30 simulations can be run in parallel. +""" executable_location = ".." # location of the compiled rescal executable experiment_name = "test_scaling" # header directory which all generated input goes into @@ -65,7 +65,7 @@ for sz in [(100, 300, 100), (50, 300, 100), (200, 300, 100), (50, 300, 50), (50, 300, 200), (50, 300, 400), (50, 150, 100), (50, 600, 100), (50, 1200, 100), (50, 2400, 100)]: (H,L,D) = sz - this_run = Design_a_run() + this_run = DesignRun() this_run.set_header("Baseline Lambda_I values at a specified tau_min") this_run.set_name("run") # Where should the input for this single run go? From 842edeb5ca0d4eed772538f166324b7dfaff24cb Mon Sep 17 00:00:00 2001 From: Kelly Kochanski Date: Tue, 17 Sep 2019 19:45:18 -0600 Subject: [PATCH 30/83] Create README for utilities --- scripts/utilities/README.md | 99 +++++++++++++++++++++++++++++++++++++ 1 file changed, 99 insertions(+) create mode 100644 scripts/utilities/README.md diff --git a/scripts/utilities/README.md b/scripts/utilities/README.md new file mode 100644 index 0000000..3dee656 --- /dev/null +++ b/scripts/utilities/README.md @@ -0,0 +1,99 @@ +# Rescal-snow utilites +This folder contains scripts for configuring, running and analyzing Rescal-snow simulations. These are run through Python3 and bash. +They make the Rescal-snow workflow more consistent and reproducible by making it possible to do most of the work in Python and store both input and output in Python classes. + +## [rescal_utilities.py](rescal_utilities.py) +Utilities to set up Rescal-snow runs quickly and easily. +These tools are designed to aid parameter space explorations, sensitivity analyses, and large batches of runs. +The following classes manage most Rescal-snow options and inputs (excepting those in the "real_data" file): + + Parameters : Class to hold, update, change, read, or write all the parameters that ReSCAL needs to run + + RunScript : Class to hold, update, change, read, or write a ReSCAL run script with appropriate flags + + DesignRun : Umbrella class to hold, update, change, read or write all parameters, sorting them into Parameters and RunScript + +Example usage: +```python +$python + +# Create the DesignRun object and (optional but advised) a basic description +my_run = rescal_utilities.DesignRun() +my_run.set_name("my_run")escal.sbatch +(base) kelly@Beauty:~/Downloads/rescal-snow/scripts/utilities$ vim example_pyrescal +(base) kelly@Beauty:~/Downloads/rescal-snow/scripts/utilities$ vim example +my_run.set_header("An example run varying L, D and Lambda_S, and looking for the rescal executable in build") + +# Describe values for some subset of Rescal-snow parameterescal.sbatch +(base) kelly@Beauty:~/Downloads/rescal-snow/scripts/utilities$ vim example_pyrescal +(base) kelly@Beauty:~/Downloads/rescal-snow/scripts/utilities$ vim examples +# Others will take defaults from rescal_utilities.Parameters._default_parameters() and rescal_utilities.RunScript._default_options() +parameters = {'L':500, 'D':50, 'Lambda_S':0.01, 'rescallocation':'../../build'} +my_run.set_parameters(parameters) +for the output should be created. The default is RESCAL_SNOW_ROOT/data_runs. +# Create a run script named my_run.run and a parameter script named my_run.par +my_run.write() +``` +See also the usage in [scripts/utilities/param_space_exploration_example.py](scripts/utilities/param_space_exploration_example.py) + +## Example: [param_space_exploration_example.py](param_space_exploration_example.py) +This is an example file showing how to run a parameter space exploration. In this example, most simulation parameters are set to fixed values, then 30 runs are created to vary: + five snowfall rates, controlled by parameter Lambda_I, + six wind speeds, controlled by parameter Tau_min, + and all 30 combinations thereof. + The script creates 30 new directories, one for each run. Each directory is seeded with a run script, a parameter file, and rescal and genesis executables. This allows all 30 simulations to run in parallel withou +t interferance. + +## [dataruns.py](dataruns.py) +A python interface to Rescal-snow. This sets Rescal-snow parameters for one or more runs, runs the simulation, and keeps the results in pythonic arrays for ongoing processing. +A DataRun object takes in the parameters and meta-parameters required to run Rescal-snow. The DataRun can receive and processthe output of Rescal-snow while Rescal-snow is running. +To run Rescal-snow using a DataRun instance, the environment variable RESCAL_SNOW_ROOT should be defined and be the path of a Rescal-snow installation. Also, a directory for the output should be created. The default is RESCAL_SNOW_ROOT/data_runs. + +```python +# + +# Describe some subset of Rescal-snow parameters and a directory for this run +parameters = {'L':500, 'D':50, 'stop after':'200_t0', 'output interval':'50_t0'} +dirname = 'myrundirectory' + +# Create and run the run +thisrun = datarun.DataRun(parameters, dirname) +thisrun.setup() +thisrun.run() +``` + +Example usage is shown in [example_pyrescal.py](example_pyrescal.py) + +## Example: [example_pyrescal.py](example_pyrescal.py) +This example tests the functionality of [datarun.py](datarun.py) in a high-performance computing environment. +The script is called using [pyrescal.sbatch](pyrescal.sbatch). + +## [heightmap.py](heightmap.py) +Utilities to create, read and visualize Rescal-snow height maps, a 2D surface height map which is standard Rescal output. These are managed through a HeightMap class. + +Utilities for creating Rescal-snow heightmaps (these may be used as initial conditions for the Rescal-snow simulation; see the INPUT_ELEVATION CSP_TEMPLATE in `src/genesis.c`). + +- invader_template + - gaussian_hill + - make_sinusoid + - scale + +Utilities for analyzing Rescal-snow heightmaps (most of these use fourier transforms, as snow/sand self-organization has strong emergent wavelengths): + + - fft2d_analyze + - fft2d_analyze_map_pic + - fft2d_crop_blur + - fft2d_center_blur + + Utilities for visualizing height maps: + + - make_surface + +## [cellspace.py](cellspace.py) +Utilities to read, write, modify and visualize Rescal-snow cell spaces, the full state of the cellular automaton. Managed through CellSpace class. Used by [datarun.py](datarun.py). +May be used for visualizing and modifying internal sand/snow structures that are not adequately represented by 2D HeightMaps. + + + + + From 00550a6948655af59151bbf1ee8162917cc35984 Mon Sep 17 00:00:00 2001 From: Kelly Kochanski Date: Tue, 17 Sep 2019 19:46:14 -0600 Subject: [PATCH 31/83] Typo fix utilities/README --- scripts/utilities/README.md | 8 ++------ 1 file changed, 2 insertions(+), 6 deletions(-) diff --git a/scripts/utilities/README.md b/scripts/utilities/README.md index 3dee656..d83189c 100644 --- a/scripts/utilities/README.md +++ b/scripts/utilities/README.md @@ -13,15 +13,11 @@ The following classes manage most Rescal-snow options and inputs (excepting thos DesignRun : Umbrella class to hold, update, change, read or write all parameters, sorting them into Parameters and RunScript -Example usage: +Example usage (python3): ```python -$python - # Create the DesignRun object and (optional but advised) a basic description my_run = rescal_utilities.DesignRun() -my_run.set_name("my_run")escal.sbatch -(base) kelly@Beauty:~/Downloads/rescal-snow/scripts/utilities$ vim example_pyrescal -(base) kelly@Beauty:~/Downloads/rescal-snow/scripts/utilities$ vim example +my_run.set_name("my_run") my_run.set_header("An example run varying L, D and Lambda_S, and looking for the rescal executable in build") # Describe values for some subset of Rescal-snow parameterescal.sbatch From 75b610e59ebb853a25bff14145eab87dc3fcf663 Mon Sep 17 00:00:00 2001 From: Kelly Kochanski Date: Tue, 17 Sep 2019 19:47:29 -0600 Subject: [PATCH 32/83] Typo utilities/README --- scripts/utilities/README.md | 10 +++------- 1 file changed, 3 insertions(+), 7 deletions(-) diff --git a/scripts/utilities/README.md b/scripts/utilities/README.md index d83189c..a030460 100644 --- a/scripts/utilities/README.md +++ b/scripts/utilities/README.md @@ -7,11 +7,11 @@ Utilities to set up Rescal-snow runs quickly and easily. These tools are designed to aid parameter space explorations, sensitivity analyses, and large batches of runs. The following classes manage most Rescal-snow options and inputs (excepting those in the "real_data" file): - Parameters : Class to hold, update, change, read, or write all the parameters that ReSCAL needs to run + *Parameters* : Class to hold, update, change, read, or write all the parameters that ReSCAL needs to run - RunScript : Class to hold, update, change, read, or write a ReSCAL run script with appropriate flags + *RunScript* : Class to hold, update, change, read, or write a ReSCAL run script with appropriate flags - DesignRun : Umbrella class to hold, update, change, read or write all parameters, sorting them into Parameters and RunScript + *DesignRun* : Umbrella class to hold, update, change, read or write all parameters, sorting them into Parameters and RunScript Example usage (python3): ```python @@ -21,8 +21,6 @@ my_run.set_name("my_run") my_run.set_header("An example run varying L, D and Lambda_S, and looking for the rescal executable in build") # Describe values for some subset of Rescal-snow parameterescal.sbatch -(base) kelly@Beauty:~/Downloads/rescal-snow/scripts/utilities$ vim example_pyrescal -(base) kelly@Beauty:~/Downloads/rescal-snow/scripts/utilities$ vim examples # Others will take defaults from rescal_utilities.Parameters._default_parameters() and rescal_utilities.RunScript._default_options() parameters = {'L':500, 'D':50, 'Lambda_S':0.01, 'rescallocation':'../../build'} my_run.set_parameters(parameters) @@ -46,8 +44,6 @@ A DataRun object takes in the parameters and meta-parameters required to run Res To run Rescal-snow using a DataRun instance, the environment variable RESCAL_SNOW_ROOT should be defined and be the path of a Rescal-snow installation. Also, a directory for the output should be created. The default is RESCAL_SNOW_ROOT/data_runs. ```python -# - # Describe some subset of Rescal-snow parameters and a directory for this run parameters = {'L':500, 'D':50, 'stop after':'200_t0', 'output interval':'50_t0'} dirname = 'myrundirectory' From d6172995ac531bbac2fc7b9fe7faefe77accba5b Mon Sep 17 00:00:00 2001 From: Kelly Kochanski Date: Tue, 17 Sep 2019 19:50:23 -0600 Subject: [PATCH 33/83] Broken link in utilities/README --- scripts/utilities/README.md | 11 ++++++----- 1 file changed, 6 insertions(+), 5 deletions(-) diff --git a/scripts/utilities/README.md b/scripts/utilities/README.md index a030460..98f31b9 100644 --- a/scripts/utilities/README.md +++ b/scripts/utilities/README.md @@ -30,7 +30,7 @@ my_run.write() ``` See also the usage in [scripts/utilities/param_space_exploration_example.py](scripts/utilities/param_space_exploration_example.py) -## Example: [param_space_exploration_example.py](param_space_exploration_example.py) +### Example: [param_space_exploration_example.py](param_space_exploration_example.py) This is an example file showing how to run a parameter space exploration. In this example, most simulation parameters are set to fixed values, then 30 runs are created to vary: five snowfall rates, controlled by parameter Lambda_I, six wind speeds, controlled by parameter Tau_min, @@ -38,7 +38,9 @@ This is an example file showing how to run a parameter space exploration. In thi The script creates 30 new directories, one for each run. Each directory is seeded with a run script, a parameter file, and rescal and genesis executables. This allows all 30 simulations to run in parallel withou t interferance. -## [dataruns.py](dataruns.py) +Usage is described in example 4 of [../../docs/rescal-snow-tutorial.md](../../docs/rescal-snow-tutorial.md). + +## [datarun.py](datarun.py) A python interface to Rescal-snow. This sets Rescal-snow parameters for one or more runs, runs the simulation, and keeps the results in pythonic arrays for ongoing processing. A DataRun object takes in the parameters and meta-parameters required to run Rescal-snow. The DataRun can receive and processthe output of Rescal-snow while Rescal-snow is running. To run Rescal-snow using a DataRun instance, the environment variable RESCAL_SNOW_ROOT should be defined and be the path of a Rescal-snow installation. Also, a directory for the output should be created. The default is RESCAL_SNOW_ROOT/data_runs. @@ -56,9 +58,8 @@ thisrun.run() Example usage is shown in [example_pyrescal.py](example_pyrescal.py) -## Example: [example_pyrescal.py](example_pyrescal.py) -This example tests the functionality of [datarun.py](datarun.py) in a high-performance computing environment. -The script is called using [pyrescal.sbatch](pyrescal.sbatch). +### Example: [example_pyrescal.py](example_pyrescal.py) +This example tests the functionality of [datarun.py](datarun.py) in a high-performance computing environment. Usage is described in [../../docs/rescal-in-python.md](../../docs/rescal-in-python.md) ## [heightmap.py](heightmap.py) Utilities to create, read and visualize Rescal-snow height maps, a 2D surface height map which is standard Rescal output. These are managed through a HeightMap class. From 6af1f263ff1057bd0d6537c93290693676c89131 Mon Sep 17 00:00:00 2001 From: Kelly Kochanski Date: Tue, 17 Sep 2019 20:00:27 -0600 Subject: [PATCH 34/83] Increased docstring coverage in utilities --- scripts/utilities/cellspace.py | 5 +- scripts/utilities/csp_creator.py | 67 ----- scripts/utilities/datarun.py | 3 +- scripts/utilities/example_pyrescal.py | 6 +- scripts/utilities/heightmap.py | 22 +- .../param_space_exploration_example.py | 17 +- .../param_space_exploration_utilities.py | 242 ------------------ scripts/utilities/rescal_utilities.py | 206 +-------------- scripts/utilities/scale_testing.py | 96 ------- 9 files changed, 47 insertions(+), 617 deletions(-) delete mode 100644 scripts/utilities/csp_creator.py mode change 100644 => 100755 scripts/utilities/heightmap.py mode change 100644 => 100755 scripts/utilities/param_space_exploration_example.py delete mode 100755 scripts/utilities/param_space_exploration_utilities.py mode change 100644 => 100755 scripts/utilities/rescal_utilities.py delete mode 100644 scripts/utilities/scale_testing.py diff --git a/scripts/utilities/cellspace.py b/scripts/utilities/cellspace.py index cd5a2ad..60ff258 100755 --- a/scripts/utilities/cellspace.py +++ b/scripts/utilities/cellspace.py @@ -1,6 +1,6 @@ -__doc__ = """Utilities to read, write, modify, and visualize rescal-snow cell spaces.""" __author__ = 'Gian-Carlo DeFazio' __date__ = 'August 16 2019' +__doc__ = r"""Utilities to read, write, modify and visualize Rescal-snow cell spaces, the full state of the cellular automaton. Managed through CellSpace class. Used by datarun.py. May be used for visualizing and modifying internal sand/snow structures that are not adequately represented by 2D HeightMaps.""" import sys import os @@ -101,6 +101,9 @@ def surface_position(a): def find_air_or_mobile(column): + """Find the height of solid cells (not air, EAU/EAUC, or mobile grains, GRJ) above one point (column) in the cellspace. + This is found by counting down from the upper boundary until a non-air/mobile grain is hit. + """ air_indices = np.nonzero(column == 3)[0] mobile_sand_indices = np.nonzero(column == 1)[0] diff --git a/scripts/utilities/csp_creator.py b/scripts/utilities/csp_creator.py deleted file mode 100644 index e02b8df..0000000 --- a/scripts/utilities/csp_creator.py +++ /dev/null @@ -1,67 +0,0 @@ -#!/usr/bin/python - -import numpy as np - -## DUN model -MOD_NAME="DUN" - -## predefined cell types -GR=0 -EAUC=3 -DUM=6 -IN=7 -OUT=8 - -############################################################### -def create_simple_space(H,L,D): - """creates a simple cellular space without sand""" - - ## create cellular space - cs=np.zeros((D,H,L),np.int8) - - ## air volume - cs[:,:,:]=EAUC - - ## ceiling - cs[:,0,:]=DUM - - ## floor - cs[:,H-1,:]=DUM - - return cs - - -############################################################### -def sand_layer(H,L,D): - """generates a cellular space with uniform sand layer""" - cs=create_simple_space(H,L,D) - - print "generating uniform sand layer" - - ## sand layer - cs[:,H-2,:]=GR - - return cs - -############################################################### -def sand_block(H,L,D): - """generates a cellular space with a block of sand""" - cs=create_simple_space(H,L,D) - - print "generating a block of sand" - - ## sand block 20x20x20 - l=10 - L2=L/2 - D2=D/2 - cs[L2-l:L2+l,H-2-2*l:H-2,D2-l:D2+l]=GR - - return cs - -############################################################### -def cellspace(H,L,D): - """generates cellular space""" - cs=sand_layer(H,L,D) - #cs=sand_block(H,L,D) - return cs - diff --git a/scripts/utilities/datarun.py b/scripts/utilities/datarun.py index 825422e..44f19bf 100755 --- a/scripts/utilities/datarun.py +++ b/scripts/utilities/datarun.py @@ -5,7 +5,8 @@ the output of Rescal-snow while Rescal-snow is running. To run Rescal-snow using a DataRun instance, the environment variable RESCAL_SNOW_ROOT should be defined and be the path of a Rescal-snow installation. Also, a directory -for the output should be created. The default is RESCAL_SNOW_ROOT/data_runs.""" +for the output should be created. The default is RESCAL_SNOW_ROOT/data_runs. +""" import os import sys diff --git a/scripts/utilities/example_pyrescal.py b/scripts/utilities/example_pyrescal.py index 874f10c..74b9266 100755 --- a/scripts/utilities/example_pyrescal.py +++ b/scripts/utilities/example_pyrescal.py @@ -2,7 +2,8 @@ __author__ = """Gian-Carlo DeFazio""" __doc__ = """This example is meant to test functionality of datarun.py -on slurm. This script can be called indirectly using sbatch.""" +on slurm. This script can be called indirectly using sbatch. +More information is provided in the datarun tutorial in docs.""" import datarun @@ -67,9 +68,12 @@ # will do a bunch of rescal runs with different random seeds # find the pmi_rank + # (This is the unique identifier of each run on a parallel cluster. + # It may have different names on different architectures.) if bool(os.environ.get('PMI_RANK', None)): pmi_rank = os.environ['PMI_RANK'] else: + print("Warning: process identifier PMI_RANK not found. If this run is parallel, collisions may occur.") pmi_rank = 0 # safe to make sure data_runs directory exists rescal_root = os.environ['RESCAL_SNOW_ROOT'] diff --git a/scripts/utilities/heightmap.py b/scripts/utilities/heightmap.py old mode 100644 new mode 100755 index ecbbb55..a59f403 --- a/scripts/utilities/heightmap.py +++ b/scripts/utilities/heightmap.py @@ -1,6 +1,23 @@ -__doc__ = """Utilities to read and visualize rescal-snow height maps.""" __author__ = 'Gian-Carlo DeFazio' __date__ = '16 August 2019' +__doc__ = r""" +Utilities to create, read and visualize Rescal-snow height maps. These are managed through a HeightMap class. + +Utilities for creating Rescal-snow heightmaps (these may be used as initial conditions for the Rescal-snow simulation; see the INPUT_ELEVATION CSP_TEMPLATE in `src/genesis.c`). +- invader_template + - gaussian_hill + - make_sinusoid + - scale + +Utilities for analyzing Rescal-snow heightmaps (most of these use fourier transforms, as snow/sand self-organization has strong emergent wavelengths): + - fft2d_analyze + - fft2d_analyze_map_pic + - fft2d_crop_blur + - fft2d_center_blur + + Utilities for visualizing height maps: + - make_surface +""" import sys import os @@ -133,6 +150,9 @@ def fft2d_analyze(data): def fft2d_analyze_map_pic(data): + """ + May be redundant with fft2d_analyze? + """ #Data points for x and y axis dpx, dpy = data.shape diff --git a/scripts/utilities/param_space_exploration_example.py b/scripts/utilities/param_space_exploration_example.py old mode 100644 new mode 100755 index 754b3d0..c8df3f0 --- a/scripts/utilities/param_space_exploration_example.py +++ b/scripts/utilities/param_space_exploration_example.py @@ -7,16 +7,16 @@ __date__ = "2018" -__doc__ = r"""This is an example file showing how to run a parameter space exploration - The exploration fixes most simluations parameters (the `parameters' dictionary') - then explores five snowfall rates, controlled by parameter Lambda_I, +__doc__ = r""" +This is an example file showing how to run a parameter space exploration. In this example, most simulation parameters are set to fixed values, then 30 runs are created to vary: + five snowfall rates, controlled by parameter Lambda_I, six wind speeds, controlled by parameter Tau_min, - and all combinations thereof. - The script creates new directories and manages the locations of input, output and executable files - so that all 30 simulations can be run in parallel. + and all 30 combinations thereof. + The script creates 30 new directories, one for each run. Each directory is seeded with a run script, a parameter file, and rescal and genesis executables. This allows all 30 simulations to run in parallel withou +t interferance. """ - +# Assemble all the pieces for this run - the executables and the output directory executable_location = ".." # location of the compiled rescal executable experiment_name = "test_parallel_runs" # header directory which all generated input goes into experiment_directory = os.path.join("../../", experiment_name) @@ -66,6 +66,7 @@ this_run = rescal_utilities.DesignRun() this_run.set_header("Baseline Lambda_I values at a specified tau_min") this_run.set_name("run") + # Where should the input for this single run go? this_directory = os.path.join(experiment_directory, "tauMin" + str(Tau_min) + "_lambdaI" + str(Lambda_I)) if not os.path.isdir(this_directory): @@ -76,6 +77,7 @@ parameters['Tau_max'] = Tau_min + 1000 this_run.set_parameters(parameters) this_run.write() + # copy executables for this run into this run directory shutil.copyfile(executable_location + "/rescal", this_directory+'/rescal') shutil.copyfile(executable_location + "/genesis", this_directory+'/genesis') @@ -83,6 +85,7 @@ os.mkdir(this_directory+'/real_data') shutil.copyfile('../real_data/sealevel_snow.prop', this_directory+'/real_data/sealevel_snow.prop') shutil.copyfile('../real_data/PDF.data', this_directory+'/real_data/PDF.data') + # while we're at it, make sure there's a place for output output_dir = parameters['Output_directory'] if output_dir[0:1] == "./": diff --git a/scripts/utilities/param_space_exploration_utilities.py b/scripts/utilities/param_space_exploration_utilities.py deleted file mode 100755 index c1d5a01..0000000 --- a/scripts/utilities/param_space_exploration_utilities.py +++ /dev/null @@ -1,242 +0,0 @@ -__author__ = "K Kochanski" - -__date__ = "July 03 2018" - -__doc__ = r"""This is a shell script designed to start organizing ReSCAL to perform a parameter space exploration; - it could be adapted to perform any set of runs with variable parameters - - The "explore_parameter_space" function creates an array of subdirectories, each containing: - - a run script (bash), generally called run.run - - a parameter file (txt), generally caled run.par - Note that the multi-directory structure is useful for several reasons: - 1. The output for each run stays in its own subdirectory, attached to the appropriate input files - 2. If multiple processors are available, they may simultaneously run separate instances of rescal-snow, one per directory, - without any communication, race conditions, or other problems -""" - -# Set up a bunch of runs to go in parallel - -import os -import numpy as np -import datetime -import itertools -import subprocess -import glob - -import rescal_utilities - - -def explore_parameter_space(output_root, executable_location, parameter_ranges, fixed_parameters, n_runs): - """ - Take in a dictionary of parameter ranges to explore, - e.g. { 'Lambda_S' : [0.001, 0.2], - 'Lambda_F' : [3, 10] } - - Setup n_runs runs to explore those, under directory output_ro - Rescal and genesis executables are located in directory executable_location - """ - - if ( os.path.isdir(output_root) == False): - os.mkdir(output_root) - - # Get some lists of parameter combos to explore - parameter_combos = _uniform_random_search(parameter_ranges, n_runs) - - # Write parameter files for each set of parameters - now = datetime.datetime.now() - for run in range(n_runs): - run_output_file = '{year}{month}{day}_{run}'.format(year=str(now.year), - month=str(now.month), - day=str(now.day), - run=str(run)) - run_output_dir = os.path.join(output_root, run_ouput_file) - - # Avoid overwriting previous results or using a messy directory - while os.path.isdir(run_output_dir): - run_output_dir += "A" - - this_run = rescal_utilities.DesignRun() - this_run.set_parameters(parameter_combos[run]) - this_run.set_parameters({'rescallocation' : executable_location, - 'parfile': 'run.par'}) - this_run.set_parameters(fixed_parameters) - this_run.set_directory(run_output_dir) - - os.mkdir(run_output_dir) - this_run.write() - -def _uniform_random_search(parameter_ranges, n_runs): - """For each run, each parameter takes a value drawn from a uniform distribution""" - - parameter_combinations = [] - - for run in range(n_runs): - these_parameters = {} - for parameter in parameter_ranges.keys(): - valuerange = parameter_ranges[parameter] - these_parameters[parameter] = np.random.uniform(valuerange[0], valuerange[1]) - - parameter_combinations.append(these_parameters) - - return parameter_combinations - - - - - - - -# TODO allow iteratables to be used -# not just lists -# TODO allow passing of arguments in dicts, but with no guaranteed ordering -def all_parameter_combos(named_parameter_lists): - """Takes a parameter list of lists of lists such as: - [['Coef_A', [0.1, 0.2, 0.3]], ['random seed', [1,2,3]]]) - so that each sublist has the variable name and set of parameters to vary over. - Creates a generator that returns a dictionary with each possible parameter - combination and a string that can be used to identify the varying parameters. - If variable names have spaces they are replaced with underscores. - """ - - # separate parameter names from values lists, cast all values to strings - names = [x[0] for x in named_parameter_lists] - parameter_lists_original = [x[1] for x in named_parameter_lists] - - # cast all values to strings - parameter_lists = [[str(i) for i in x] for x in parameter_lists_original] - - # create a generator that makes all combination of parameters lists (the cartesian product) - # also creates a string for the file name - for parameter_combination in itertools.product(*parameter_lists): - # create a dict of the names and some value combination - params_dict_to_add = dict(zip(names, parameter_combination)) - # creats a directory name based on the names and values - # if any of the values are file paths, only the base name of the file is used - directory_name_suffix = [name.replace(' ', '_') + '-' + \ - os.path.basename(str(params_dict_to_add[name])) for name in names] - yield params_dict_to_add, '--'.join(directory_name_suffix) - - - - - -#### NOTE: set up for power-lab machine usage, meaning on a single PC, not a cluster -def make_run_directories(fixed_params, variable_params, experiment_name, run_header, run_name): - """ - Create a set of directories that contain all needed files for separate rescal runs. - The directories exist in a top level directory of experiment_name. - Each directory is names based on its varying parameters. - The paths to the run scripts are returned for easy execution on the - power-lab machines. - """ - - # make the top level directory, but don't overwrite a directory that - # already exists - experiment_directory_name = experiment_name - if not os.path.isdir(experiment_directory): - os.mkdir(experiment_directory) - # TODO deal with case that directory already exists - else: - return - - - - # save the paths to the run scipts for running them later - run_scripts = [] - - # create full parameter set for each run - # as well as the directory suffix for each run sub directory - for current_variable_params in all_parameter_combos(variable_params): - params_to_add, directory_suffix = current_variable_params - parameters = {**fixed_params, **params_to_add} - this_run = rescal_utilities.Design_a_run() - #this_run.set_header(run_header) - this_run.set_name(run_name) - # create a directory for each run inside the experiment directory - run_directory = os.path.join(experiment_directory_name, directory_suffix) - if not os.path.isdir(run_directory): - os.mkdir(run_directory) - - this_run.set_directory(run_directory) - this_run.set_parameters(parameters) - this_run.write() - - # store all the run scripts for future use - run_scripts.append(os.path.join(run_directory, run_name + '.run')) - - return run_scripts - - -#### NOTE: set up for power-lab machine usage, meaning on a single PC, not a cluster -def run_rescals(run_scripts): - """ - Takes path to a set of run_scripts that should be in the proper locations - to run rescal and runs each of them. Runs should be asynchronous. - """ - - # if any spaces in path names, turns ' ' into '\ ' so the shell can understand them - modded_scripts = [] - for run_script in run_scripts: - modded_scripts.append(run_script.replace(' ', '\\ ')) - - processes = [] - # move to the directory of each run_script and run it - for modded_script in modded_scripts: - processes.append(subprocess.Popen('cd ' + os.path.dirname(modded_script) + \ - ' && ' + modded_script, shell=True)) - for p in processes: - p.wait() - - -# TODO, 2 copies of this function, the other in param_space_exploration_utilities.py -def get_files_to_process(top_dir, path_glob, exclude_globs): - """ - given a top directory top_dir - all of its subdirectories will be checked for files - that match some the path_glob - so any file of name top_dir/"any subdirectory of top_dir"/path_glob - will match unless that file name matches some glob_exclude - examples: - for cellspace files path_glob='*.csp*' exclude_globs=['DUN.csp'] - for ALTI files path_glob='ALTI*' exclude_globs=[] - """ - - # get all the directories in top_directory (from stack overflow 973473) - # make them absolute paths - output_dirs = sorted([f.path for f in os.scandir(top_dir) if f.is_dir()]) - for i in range(len(output_dirs)): - output_dirs[i] = os.path.abspath(output_dirs[i]) - - # make 2D array or absolute paths to all the .csp* files - paths = [] - for output_dir in output_dirs: - # get all possible matches - local_paths = glob.glob(os.path.join(output_dir, path_glob)) - # find the ones to exclude - exclude_paths = [] - for exclude_glob in exclude_globs: - exclude_paths += glob.glob(os.path.join(output_dir, exclude_glob)) - - # now remove the bad paths from the good ones - local_paths = sorted(list(set(local_paths) - set(exclude_paths))) - - # if this sub_dir has files to add, add them - if local_paths: - paths.append(local_paths) - # if no files were added, paths will not have changed - # however, always returs a 2D list - if paths == []: - return [[]] - - # truncate paths so that each row has the same number - # it's possible that the output_dirs won't all have the - # same number of .csp files if the simulation doesn't finish - # so just limit row size to minimum of any output directory - # there shouldn't be any empty lists in paths - paths_truncated = [] - min_files_in_dir = min([len(p) for p in paths]) - for p in paths: - paths_truncated.append(p[:min_files_in_dir]) - return paths_truncated - - diff --git a/scripts/utilities/rescal_utilities.py b/scripts/utilities/rescal_utilities.py old mode 100644 new mode 100755 index 9f8c450..7760c10 --- a/scripts/utilities/rescal_utilities.py +++ b/scripts/utilities/rescal_utilities.py @@ -1,4 +1,4 @@ -___author__ = "Kelly Kochanski" + __date__ = "Jun 25 2018" __doc__ = r"""Utilities to set up run scripts quickly and easily; these tools are designed to aid parameter space explorations, sensitivity analyses, and large batches of runs. @@ -8,10 +8,6 @@ """ import os -import re -import itertools -import subprocess -import glob class DesignRun(): """ @@ -48,6 +44,7 @@ def list_all(self): return self.run_script.list_all(), self.parameters.list_all() def get(self, param): + """get a parameter value from Parameters() object""" if param in self.parameters.list_all(): return self.parameters.get(param) elif param in self.run_script.list_all(): @@ -118,8 +115,8 @@ def _default_header(self): def _default_parameters(self): """ Default values for parameters - Initialized here for sahara sand - Basic model parameters and geometry of model run: + Used by all runs setup with the DesignRun workflow unless overwritten with the set_parameters() function. + Default values are sahara sand. """ self.new_parameter('Model', 'Defines a set of transitions for grains in the cellular automaton e.g. DUN or SNO', 'SNO') self.new_parameter('Output_directory', 'Directory where output files go', './out') @@ -348,7 +345,7 @@ def _default_options(self): def _set_flag_option(self, descriptive_name, flag, value): """ - Some options are command line flags. Some are not. + Some options are command line flags. Some are set elsewhere in the run script. Try to hide this bit of extra complexity from the user. """ self._flag_options[descriptive_name] = flag @@ -462,196 +459,3 @@ def write(self, filename): # make file executable os.chmod(filename, 0o764) - -##-------------------------------------------------------------------------------------- -##-------------------------------------------------------------------------------------- -##-------------------------------------------------------------------------------------- - - - -# TODO allow iteratables to be used -# not just lists -# TODO allow passing of arguments in dicts, but with no guaranteed ordering -def all_parameter_combos(named_parameter_lists): - """ - Takes a parameter list of lists of lists such as: - [['Coef_A', [0.1, 0.2, 0.3]], ['random seed', [1,2,3]]]) - so that each sublist has the variable name and set of parameters to vary over. - Creates a generator that returns a dictionary with each possible parameter - combination and a string that can be used to identify the varying parameters. - If variable names have spaces they are replaced with underscores. - """ - - # separate parameter names from values lists, cast all values to strings - names = [x[0] for x in named_parameter_lists] - parameter_lists_original = [x[1] for x in named_parameter_lists] - - # cast all values to strings - parameter_lists = [[str(i) for i in x] for x in parameter_lists_original] - - # create a generator that makes all combination of parameters lists (the cartesian product) - # also creates a string for the file name - for parameter_combination in itertools.product(*parameter_lists): - # create a dict of the names and some value combination - params_dict_to_add = dict(zip(names, parameter_combination)) - # creats a directory name based on the names and values - # if any of the values are file paths, only the base name of the file is used - directory_name_suffix = [name.replace(' ', '_') + '-' + \ - os.path.basename(str(params_dict_to_add[name])) for name in names] - yield params_dict_to_add, '--'.join(directory_name_suffix) - - - -#### NOTE: set up for power-lab machine usage, meaning on a single PC, not a cluster -def make_run_directories(fixed_params, variable_params, experiment_name, run_header, run_name): - """ - Create a set of directories that contain all needed files for separate rescal runs. - The directories exist in a top level directory of experiment_name. - Each directory is names based on its varying parameters. - The paths to the run scripts are returned for easy execution on the - power-lab machines. - """ - - # make the top level directory, but don't overwrite a directory that - # already exists - experiment_directory_name = experiment_name - if not os.path.isdir(experiment_name): - os.mkdir(experiment_name) - # TODO deal with case that directory already exists - else: - return - - # save the paths to the run scipts for running them later - run_scripts = [] - - # create full parameter set for each run - # as well as the directory suffix for each run sub directory - for current_variable_params in all_parameter_combos(variable_params): - params_to_add, directory_suffix = current_variable_params - parameters = {**fixed_params, **params_to_add} - this_run = DesignRun() - #this_run.set_header(run_header) - this_run.set_name(run_name) - # create a directory for each run inside the experiment directory - run_directory = os.path.join(experiment_directory_name, directory_suffix) - if not os.path.isdir(run_directory): - os.mkdir(run_directory) - - this_run.set_directory(run_directory) - this_run.set_parameters(parameters) - this_run.write() - - # store all the run scripts for future use - run_scripts.append(os.path.join(run_directory, run_name + '.run')) - - return run_scripts - - -#### NOTE: set up for power-lab machine usage, meaning on a single PC, not a cluster -def run_rescals(run_scripts): - """ - Takes a list of paths to .run scripts that should already be in directories set up - to run ReSCAL. An instance of ReSCAL is started using each run script and then - the ReSCAL all run at the same time and asynchronously. This function waits for all the - child processes to complete. - """ - - # if any spaces in path names, turns ' ' into '\ ' so the shell can understand them - modded_scripts = [] - for run_script in run_scripts: - modded_scripts.append(run_script.replace(' ', '\\ ')) - - processes = [] - # move to the directory of each run_script and run it - for modded_script in modded_scripts: - processes.append(subprocess.Popen('cd ' + os.path.dirname(modded_script) + \ - ' && ' + modded_script, shell=True)) - for p in processes: - p.wait() - - -def par_to_dict(filename): - """ - given a .par file, returns a dictionary of parameters - TODO, could be more flexible, but works for the auto-generated ones - """ - with open(filename, 'r') as f: - data = f.read() - - # get all the assignment strings - value_assignment = re.compile(r'([^#\n]*)[ ]*=[ ]*([^#\n]+)') - return dict(re.findall(value_assignment, data)) - -def cmd_line_args(filename): - """given a rescal .run file, get the command-line arguments for rescal""" - with open(filename, 'r') as f: - data = f.read() - # get the rescal line - - rescal_line = re.search(r'(\./rescal.*)\n', data) - # now get the args out - flag_arg = re.compile(r'(-[^\s]*)+(?:[ \t]+|\n)([^-\s]*)') - flag_value_pairs = flag_arg.findall(rescal_line.group(0)) - return dict(flag_value_pairs) - -def get_files_to_process(top_dir, path_glob, exclude_globs): - """ - given a top directory top_dir - all of its subdirectories will be checked for files - that match some the path_glob - so any file of name top_dir/"any subdirectory of top_dir"/path_glob - will match unless that file name matches some glob_exclude - examples: - for cellspace files path_glob='*.csp*' exclude_globs=['DUN.csp'] - for ALTI files path_glob='ALTI*' exclude_globs=[] - """ - - - # get all the directories in top_directory (from stack overflow 973473) - # make them absolute paths - output_dirs = sorted([f.path for f in os.scandir(top_dir) if f.is_dir()]) - for i in range(len(output_dirs)): - output_dirs[i] = os.path.abspath(output_dirs[i]) - - # make 2D array or absolute paths to all the .csp* files - paths = [] - for output_dir in output_dirs: - # get all possible matches - local_paths = glob.glob(output_dir + '/' + path_glob) - # find the ones to exclude - exclude_paths = [] - for exclude_glob in exclude_globs: - exclude_paths += glob.glob(output_dir + '/' + exclude_glob) - - # now remove the bad paths from the good ones - local_paths = sorted(list(set(local_paths) - set(exclude_paths))) - - # if this sub_dir has files to add, add them - if local_paths: - paths.append(local_paths) - # if no files were added, paths will not have changed - # however, always returs a 2D list - if paths == []: - return [[]] - - # truncate paths so that each row has the same number - # it's possible that the output_dirs won't all have the - # same number of .csp files if the simulation doesn't finish - # so just limit row size to minimum of any output directory - # there shouldn't be any empty lists in paths - paths_truncated = [] - min_files_in_dir = min([len(p) for p in paths]) - for p in paths: - paths_truncated.append(p[:min_files_in_dir]) - return paths_truncated - -def random_initial_states(num_states, parameters, top_dir, run_header='run', run_name='run'): - """create num_states random seeds""" - seed_numbers = random.sample(range(1,1000000), num_states) - seeds = [['random seed', seed_numbers]] - - run_files = make_run_directories(parameters, seeds, top_dir, run_header, run_name) - - run_rescals(run_files) - - paths = get_files_to_process(top_dir, ) diff --git a/scripts/utilities/scale_testing.py b/scripts/utilities/scale_testing.py deleted file mode 100644 index 7a41084..0000000 --- a/scripts/utilities/scale_testing.py +++ /dev/null @@ -1,96 +0,0 @@ -from rescal_utilities import * -import os -import shutil - -__author__ = "Kelly Kochanski and Adam Rubin" -__date__ = "2018" -__doc__ = r"""This is an example file showing how to run a parameter space exploration on multiple cores - The exploration fixes most simluations parameters (the `parameters' dictionary') - then explores five snowfall rates, controlled by parameter Lambda_I, - six wind speeds, controlled by parameter Tau_min, - and all combinations thereof. - - The script creates new directories and manages the locations of input, output and executable files - so that all 30 simulations can be run in parallel. -""" - -executable_location = ".." # location of the compiled rescal executable -experiment_name = "test_scaling" # header directory which all generated input goes into -experiment_directory = os.path.join("../../", experiment_name) -if not os.path.isdir(experiment_directory): - os.mkdir(experiment_directory) - -# Parameters held constant for all simulations -parameters = { - 'Model': 'SNO', - 'Output_directory': './out', - 'Csp_file': 'DUN.csp', - 'Csp_template': 'SNOWFALL(4)', - 'parfile': 'run.par', - 'Boundary': 'OPEN', - 'Time': 0.0, - 'H': 50, - 'L': 400, - 'D': 100, - 'Centering_delay': 0, - 'Phys_prop_file': 'real_data/sealevel_snow.prop', - 'Qsat_file': 'real_data/PDF.data', - 'Lambda_A': 1, - 'Lambda_E': 1, - 'Lambda_T': 1.5, - 'Lambda_C': 0.5, - 'Lambda_G': 100000, - 'Lambda_D': 0.01, - 'Lambda_S': 0, - 'Lambda_F': 1, - 'Coef_A': 0.1, - 'Coef_B': 10, - 'Coef_C': 10, - 'Prob_link_ET': 0.5, - 'Prob_link_TT': 1.0, - 'High_mobility': 1, - 'Ava_mode': 'TRANS', - 'Ava_angle': 38, - 'Ava_h_lim': 1, - 'Tau_min' : 0, - 'Tau_max' : 1000, - 'Lambda_I' : 0.001, - 'Lgca_delay': 1, - 'Lgca_speedup': 1000, - 'rescallocation': '.' # this is where run script looks for rescal+genesis executables -} - -# These for loops vary the parameters for snowfall rate and wind speed -for Lambda_I in [0.001] : - for sz in [(100, 300, 100), (50, 300, 100), (200, 300, 100), - (50, 300, 50), (50, 300, 200), (50, 300, 400), (50, 150, 100), (50, 600, 100), (50, 1200, 100), (50, 2400, 100)]: - (H,L,D) = sz - this_run = DesignRun() - this_run.set_header("Baseline Lambda_I values at a specified tau_min") - this_run.set_name("run") - # Where should the input for this single run go? - this_directory = os.path.join(experiment_directory, 'H'+str(H)+'_L'+str(L)+'_D'+str(D)) - if not os.path.isdir(this_directory): - os.mkdir(this_directory) - this_run.set_directory(this_directory) - parameters['Lambda_I'] = Lambda_I - parameters['L'] = L - parameters['D'] = D - parameters['H'] = H - this_run.set_parameters(parameters) - this_run.write() - # copy executables for this run into this run directory - shutil.copyfile(executable_location + "/rescal", this_directory+'/rescal') - shutil.copyfile(executable_location + "/genesis", this_directory+'/genesis') - if not os.path.isdir(this_directory+'/real_data'): - os.mkdir(this_directory+'/real_data') - shutil.copyfile('../real_data/sealevel_snow.prop', this_directory+'/real_data/sealevel_snow.prop') - shutil.copyfile('../real_data/PDF.data', this_directory+'/real_data/PDF.data') - # while we're at it, make sure there's a place for output - output_dir = parameters['Output_directory'] - if output_dir[0:1] == "./": - output_dir = output_dir[2:] - output_dir = os.path.join(experiment_directory, output_dir) - if not os.path.isdir(output_dir): - os.mkdir(output_dir) - From 29e118090f290d9bac7f3fd28d41a99d3126689a Mon Sep 17 00:00:00 2001 From: Kelly Kochanski Date: Wed, 18 Sep 2019 14:14:00 -0600 Subject: [PATCH 35/83] Typo in paper.md Fixed affiliation indexing syntax --- paper/paper.md | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/paper/paper.md b/paper/paper.md index a812328..e6675f6 100644 --- a/paper/paper.md +++ b/paper/paper.md @@ -28,7 +28,7 @@ affiliations: - name: Department of Geological Sciences, University of Colorado at Boulder, Boulder, CO, USA index: 1 - name: Computing Division, Lawrence Livermore National Laboratory, Livermore, CA, USA - - index: 2 + index: 2 - name: Department of Computer Science, Western Washington University, Bellingham, WA, USA index: 3 - name: Department of Electrical Engineering and Computer Sciences, University of California Berkeley, Berkeley, CA, USA From 8aff6d5ea3c4d597df9e6625fdb9bdc6aa55364c Mon Sep 17 00:00:00 2001 From: egreen77 <45573926+egreen77@users.noreply.github.com> Date: Wed, 18 Sep 2019 17:30:44 -0700 Subject: [PATCH 36/83] Fixed unused result warnings (#31) Fixes issues with `fread` results not being checked. --- src/format.c | 6 +++++- src/genesis.c | 5 ++++- src/lgca.c | 5 ++++- 3 files changed, 13 insertions(+), 3 deletions(-) diff --git a/src/format.c b/src/format.c index 037b903..74a692c 100644 --- a/src/format.c +++ b/src/format.c @@ -257,7 +257,11 @@ void read_csp(char *filename) { LogPrintf("csp_cell_size = %d\n", csp_cell_size); for (k = csp_y_bounds; k < D - csp_y_bounds; k++) { // profondeur - fread(buf, csp_cell_size, csp_H * csp_L, fp); + if ((int32_t)fread(buf, csp_cell_size, csp_H * csp_L, fp) != (csp_cell_size * csp_H * csp_L)) { + ErrPrintf("Read error\n"); + exit(-1); + } + aux = buf; pt = TE + k * HL; for (j = 0; j < H; j++) { // hauteur diff --git a/src/genesis.c b/src/genesis.c index bbdf9c7..91b736e 100644 --- a/src/genesis.c +++ b/src/genesis.c @@ -666,7 +666,10 @@ float* load_surface(char *nom, int32_t lx, int32_t ly) { pt_al = altimap; for (j = 0; j < ly; j++) for (i = 0; i < lx; i++, pt_al++) { - fscanf(f, "%f \n", pt_al); + if (fscanf(f, "%f \n", pt_al) != 1) { + ErrPrintf("Read error\n"); + exit(-1); + } } fclose(f); diff --git a/src/lgca.c b/src/lgca.c index dfc583a..9245a42 100644 --- a/src/lgca.c +++ b/src/lgca.c @@ -566,7 +566,10 @@ void lecture_mvt() { exit(-4); } - fread(CelMvt, sizeof(MvtField), CHLD, fp); + if (fread(CelMvt, sizeof(MvtField), CHLD, fp) != sizeof(MvtField) * CHLD) { + ErrPrintf("Read error\n"); + exit(-1); + } fclose(fp); From 9f6c218dfd51dd76356b17c59752fb5784d573ce Mon Sep 17 00:00:00 2001 From: Richard Barnes Date: Thu, 19 Sep 2019 10:29:42 -0700 Subject: [PATCH 37/83] Use find_package instead of including png and zlib ourselves (#30) * Use find_package instead of including png and zlib ourselves * Fix issue with fread checking the wrong number of elements * Added info about installing libpng and zlib to README * Cast fread to int32_t --- CMakeLists.txt | 9 +- README.md | 4 +- lib/libpng-1.6.37/ANNOUNCE | 47 - lib/libpng-1.6.37/AUTHORS | 45 - lib/libpng-1.6.37/CHANGES | 6109 ------ lib/libpng-1.6.37/CMakeLists.txt | 931 - lib/libpng-1.6.37/INSTALL | 465 - lib/libpng-1.6.37/LICENSE | 134 - lib/libpng-1.6.37/Makefile.am | 393 - lib/libpng-1.6.37/Makefile.in | 2428 --- lib/libpng-1.6.37/README | 183 - lib/libpng-1.6.37/TODO | 23 - lib/libpng-1.6.37/TRADEMARK | 8 - lib/libpng-1.6.37/aclocal.m4 | 1196 -- lib/libpng-1.6.37/arm/arm_init.c | 136 - lib/libpng-1.6.37/arm/filter_neon.S | 253 - .../arm/filter_neon_intrinsics.c | 402 - .../arm/palette_neon_intrinsics.c | 149 - lib/libpng-1.6.37/autogen.sh | 225 - lib/libpng-1.6.37/compile | 348 - lib/libpng-1.6.37/config.guess | 1476 -- lib/libpng-1.6.37/config.h.in | 126 - 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delete mode 100644 lib/zlib-1.2.11/win32/zlib1.rc delete mode 100644 lib/zlib-1.2.11/zconf.h.cmakein delete mode 100644 lib/zlib-1.2.11/zconf.h.in delete mode 100644 lib/zlib-1.2.11/zlib.3 delete mode 100644 lib/zlib-1.2.11/zlib.3.pdf delete mode 100644 lib/zlib-1.2.11/zlib.h delete mode 100644 lib/zlib-1.2.11/zlib.map delete mode 100644 lib/zlib-1.2.11/zlib.pc.cmakein delete mode 100644 lib/zlib-1.2.11/zlib.pc.in delete mode 100755 lib/zlib-1.2.11/zlib2ansi delete mode 100644 lib/zlib-1.2.11/zutil.c delete mode 100644 lib/zlib-1.2.11/zutil.h diff --git a/CMakeLists.txt b/CMakeLists.txt index a158c3b..ad49ec1 100644 --- a/CMakeLists.txt +++ b/CMakeLists.txt @@ -2,19 +2,14 @@ cmake_minimum_required (VERSION 3.9) project (rescal-snow DESCRIPTION "Simulating snow self-organization with cellular automata" - HOMEPAGE_URL "https://github.com/kellykochanski/rescal-snow" LANGUAGES C ) set(CMAKE_MODULE_PATH "${CMAKE_SOURCE_DIR}/cmake" ${CMAKE_MODULE_PATH}) find_package(Sanitizers) -add_subdirectory(lib/libpng-1.6.37) -add_subdirectory(lib/zlib-1.2.11) - -#Ugly hack needed to fix a mysterious issue on Mac -include_directories(lib/libpng-1.6.37) -include_directories(${CMAKE_CURRENT_BINARY_DIR}/lib/libpng-1.6.37) +find_package(ZLIB 1.2 REQUIRED) +find_package(PNG 1.6 REQUIRED) set(COMMON_SOURCES src/cells.c diff --git a/README.md b/README.md index be673e0..0e921af 100644 --- a/README.md +++ b/README.md @@ -61,6 +61,8 @@ If you modify rescal-snow, you will need to modify and compile C code. We have a * C compiler (GCC and CLANG are known to work) * cmake>=3.1 (used for compiling) * make (used for compiling) + * [libpng](http://www.libpng.org/pub/png/libpng.html) (known to work with v1.6.37) + * [zlib](https://www.zlib.net) (known to work with 1.2.11) * Optional packages used for analysis (see the [analysis](analysis) and [scripts/utilities](scripts/utilities) directories): * Python3 (used for analysis) * numpy (used by Python3 for analysis) @@ -71,7 +73,7 @@ If you modify rescal-snow, you will need to modify and compile C code. We have a On a Debian-based/Ubuntu Linux machine, the dependencies can be acquired using: ```bash -sudo apt install gcc cmake make python3 python3-numpy python3-pandas python3-scipy +sudo apt install gcc cmake make libpng-dev zlib1g-dev python3 python3-numpy python3-pandas python3-scipy ``` On most machines, the Python packages can also be acquired using: diff --git a/lib/libpng-1.6.37/ANNOUNCE b/lib/libpng-1.6.37/ANNOUNCE deleted file mode 100644 index ecf9c70..0000000 --- a/lib/libpng-1.6.37/ANNOUNCE +++ /dev/null @@ -1,47 +0,0 @@ -libpng 1.6.37 - April 14, 2019 -============================== - -This is a public release of libpng, intended for use in production code. - - -Files available for download ----------------------------- - -Source files with LF line endings (for Unix/Linux): - - * libpng-1.6.37.tar.xz (LZMA-compressed, recommended) - * libpng-1.6.37.tar.gz - -Source files with CRLF line endings (for Windows): - - * lp1637.7z (LZMA-compressed, recommended) - * lp1637.zip - -Other information: - - * README.md - * LICENSE.md - * AUTHORS.md - * TRADEMARK.md - - -Changes since the previous public release (version 1.6.36) ----------------------------------------------------------- - - * Fixed a use-after-free vulnerability (CVE-2019-7317) in png_image_free. - * Fixed a memory leak in the ARM NEON implementation of png_do_expand_palette. - * Fixed a memory leak in pngtest.c. - * Fixed two vulnerabilities (CVE-2018-14048, CVE-2018-14550) in - contrib/pngminus; refactor. - * Changed the license of contrib/pngminus to MIT; refresh makefile and docs. - (Contributed by Willem van Schaik) - * Fixed a typo in the libpng license v2. - (Contributed by Miguel Ojeda) - * Added makefiles for AddressSanitizer-enabled builds. - * Cleaned up various makefiles. - - -Send comments/corrections/commendations to png-mng-implement at lists.sf.net. -Subscription is required; visit -https://lists.sourceforge.net/lists/listinfo/png-mng-implement -to subscribe. diff --git a/lib/libpng-1.6.37/AUTHORS b/lib/libpng-1.6.37/AUTHORS deleted file mode 100644 index 79a3d10..0000000 --- a/lib/libpng-1.6.37/AUTHORS +++ /dev/null @@ -1,45 +0,0 @@ -PNG REFERENCE LIBRARY AUTHORS -============================= - -This is the list of PNG Reference Library ("libpng") Contributing -Authors, for copyright and licensing purposes. - - * Andreas Dilger - * Cosmin Truta - * Dave Martindale - * Eric S. Raymond - * Gilles Vollant - * Glenn Randers-Pehrson - * Greg Roelofs - * Guy Eric Schalnat - * James Yu - * John Bowler - * Kevin Bracey - * Magnus Holmgren - * Mandar Sahastrabuddhe - * Mans Rullgard - * Matt Sarett - * Mike Klein - * Paul Schmidt - * Sam Bushell - * Samuel Williams - * Simon-Pierre Cadieux - * Tim Wegner - * Tom Lane - * Tom Tanner - * Vadim Barkov - * Willem van Schaik - * Zhijie Liang - * Arm Holdings - - Richard Townsend - * Google Inc. - - Matt Sarett - - Mike Klein - -The build projects, the build scripts, the test scripts, and other -files in the "projects", "scripts" and "tests" directories, have other -copyright owners, but are released under the libpng license. - -Some files in the "contrib" directory, and some tools-generated files -that are distributed with libpng, have other copyright owners, and are -released under other open source licenses. diff --git a/lib/libpng-1.6.37/CHANGES b/lib/libpng-1.6.37/CHANGES deleted file mode 100644 index f0b0a93..0000000 --- a/lib/libpng-1.6.37/CHANGES +++ /dev/null @@ -1,6109 +0,0 @@ -CHANGES - changes for libpng - -version 0.1 [March 29, 1995] - initial work-in-progress release - -version 0.2 [April 1, 1995] - added reader into png.h - fixed small problems in stub file - -version 0.3 [April 8, 1995] - added pull reader - split up pngwrite.c to several files - added pnglib.txt - added example.c - cleaned up writer, adding a few new transformations - fixed some bugs in writer - interfaced with zlib 0.5 - added K&R support - added check for 64 KB blocks for 16 bit machines - -version 0.4 [April 26, 1995] - cleaned up code and commented code - simplified time handling into png_time - created png_color_16 and png_color_8 to handle color needs - cleaned up color type defines - fixed various bugs - made various names more consistent - interfaced with zlib 0.71 - cleaned up zTXt reader and writer (using zlib's Reset functions) - split transformations into pngrtran.c and pngwtran.c - -version 0.5 [April 30, 1995] - interfaced with zlib 0.8 - fixed many reading and writing bugs - saved using 3 spaces instead of tabs - -version 0.6 [May 1, 1995] - first beta release - added png_large_malloc() and png_large_free() - added png_size_t - cleaned up some compiler warnings - added png_start_read_image() - -version 0.7 [June 24, 1995] - cleaned up lots of bugs - finished dithering and other stuff - added test program - changed name from pnglib to libpng - -version 0.71 [June 26, 1995] - changed pngtest.png for zlib 0.93 - fixed error in libpng.txt and example.c - -version 0.8 [August 20, 1995] - cleaned up some bugs - added png_set_filler() - split up pngstub.c into pngmem.c, pngio.c, and pngerror.c - added #define's to remove unwanted code - moved png_info_init() to png.c - added old_size into png_realloc() - added functions to manually set filtering and compression info - changed compression parameters based on image type - optimized filter selection code - added version info - changed external functions passing floats to doubles (k&r problems?) - put all the configurable stuff in pngconf.h - enabled png_set_shift to work with paletted images on read - added png_read_update_info() - updates info structure with transformations - -Version 0.81 [August, 1995] - incorporated Tim Wegner's medium model code (thanks, Tim) - -Version 0.82 [September, 1995] - [unspecified changes] - -Version 0.85 [December, 1995] - added more medium model code (almost everything's a far) - added i/o, error, and memory callback functions - fixed some bugs (16-bit, 4-bit interlaced, etc.) - added first run progressive reader (barely tested) - -Version 0.86 [January, 1996] - fixed bugs - improved documentation - -Version 0.87 [January, 1996] - fixed medium model bugs - fixed other bugs introduced in 0.85 and 0.86 - added some minor documentation - -Version 0.88 [January, 1996] - fixed progressive bugs - replaced tabs with spaces - cleaned up documentation - added callbacks for read/write and warning/error functions - -Version 0.89 [June 5, 1996] - Added new initialization API to make libpng work better with shared libs - we now have png_create_read_struct(), png_create_write_struct(), - png_create_info_struct(), png_destroy_read_struct(), and - png_destroy_write_struct() instead of the separate calls to - malloc and png_read_init(), png_info_init(), and png_write_init() - Changed warning/error callback functions to fix bug - this means you - should use the new initialization API if you were using the old - png_set_message_fn() calls, and that the old API no longer exists - so that people are aware that they need to change their code - Changed filter selection API to allow selection of multiple filters - since it didn't work in previous versions of libpng anyways - Optimized filter selection code - Fixed png_set_background() to allow using an arbitrary RGB color for - paletted images - Fixed gamma and background correction for paletted images, so - png_correct_palette is not needed unless you are correcting an - external palette (you will need to #define PNG_CORRECT_PALETTE_SUPPORTED - in pngconf.h) - if nobody uses this, it may disappear in the future. - Fixed bug with Borland 64K memory allocation (Alexander Lehmann) - Fixed bug in interlace handling (Smarasderagd, I think) - Added more error checking for writing and image to reduce invalid files - Separated read and write functions so that they won't both be linked - into a binary when only reading or writing functionality is used - New pngtest image also has interlacing and zTXt - Updated documentation to reflect new API - -Version 0.89c [June 17, 1996] - Bug fixes. - -Version 0.90 [January, 1997] - Made CRC errors/warnings on critical and ancillary chunks configurable - libpng will use the zlib CRC routines by (compile-time) default - Changed DOS small/medium model memory support - needs zlib 1.04 (Tim Wegner) - Added external C++ wrapper statements to png.h (Gilles Dauphin) - Allow PNG file to be read when some or all of file signature has already - been read from the beginning of the stream. ****This affects the size - of info_struct and invalidates all programs that use a shared libpng**** - Fixed png_filler() declarations - Fixed? background color conversions - Fixed order of error function pointers to match documentation - Current chunk name is now available in png_struct to reduce the number - of nearly identical error messages (will simplify multi-lingual - support when available) - Try to get ready for unknown-chunk callback functions: - - previously read critical chunks are flagged, so the chunk handling - routines can determine if the chunk is in the right place - - all chunk handling routines have the same prototypes, so we will - be able to handle all chunks via a callback mechanism - Try to fix Linux "setjmp" buffer size problems - Removed png_large_malloc, png_large_free, and png_realloc functions. - -Version 0.95 [March, 1997] - Fixed bug in pngwutil.c allocating "up_row" twice and "avg_row" never - Fixed bug in PNG file signature compares when start != 0 - Changed parameter type of png_set_filler(...filler...) from png_byte - to png_uint_32 - Added test for MACOS to ensure that both math.h and fp.h are not #included - Added macros for libpng to be compiled as a Windows DLL (Andreas Kupries) - Added "packswap" transformation, which changes the endianness of - packed-pixel bytes (Kevin Bracey) - Added "strip_alpha" transformation, which removes the alpha channel of - input images without using it (not necessarily a good idea) - Added "swap_alpha" transformation, which puts the alpha channel in front - of the color bytes instead of after - Removed all implicit variable tests which assume NULL == 0 (I think) - Changed several variables to "png_size_t" to show 16/32-bit limitations - Added new pCAL chunk read/write support - Added experimental filter selection weighting (Greg Roelofs) - Removed old png_set_rgbx() and png_set_xrgb() functions that have been - obsolete for about 2 years now (use png_set_filler() instead) - Added macros to read 16- and 32-bit ints directly from buffer, to be - used only on those systems that support it (namely PowerPC and 680x0) - With some testing, this may become the default for MACOS/PPC systems. - Only calculate CRC on data if we are going to use it - Added macros for zTXt compression type PNG_zTXt_COMPRESSION_??? - Added macros for simple libpng debugging output selectable at compile time - Removed PNG_READ_END_MODE in progressive reader (Smarasderagd) - More description of info_struct in libpng.txt and png.h - More instructions in example.c - More chunk types tested in pngtest.c - Renamed pngrcb.c to pngset.c, and all png_read_ functions to be - png_set_. We now have corresponding png_get_ - functions in pngget.c to get information in info_ptr. This isolates - the application from the internal organization of png_info_struct - (good for shared library implementations). - -Version 0.96 [May, 1997] - Fixed serious bug with < 8bpp images introduced in 0.95 - Fixed 256-color transparency bug (Greg Roelofs) - Fixed up documentation (Greg Roelofs, Laszlo Nyul) - Fixed "error" in pngconf.h for Linux setjmp() behavior - Fixed DOS medium model support (Tim Wegner) - Fixed png_check_keyword() for case with error in static string text - Added read of CRC after IEND chunk for embedded PNGs (Laszlo Nyul) - Added typecasts to quiet compiler errors - Added more debugging info - -Version 0.97 [January, 1998] - Removed PNG_USE_OWN_CRC capability - Relocated png_set_crc_action from pngrutil.c to pngrtran.c - Fixed typecasts of "new_key", etc. (Andreas Dilger) - Added RFC 1152 [sic] date support - Fixed bug in gamma handling of 4-bit grayscale - Added 2-bit grayscale gamma handling (Glenn R-P) - Added more typecasts. 65536L becomes (png_uint_32)65536L, etc. (Glenn R-P) - Minor corrections in libpng.txt - Added simple sRGB support (Glenn R-P) - Easier conditional compiling, e.g., - define PNG_READ/WRITE_NOT_FULLY_SUPPORTED; - all configurable options can be selected from command-line instead - of having to edit pngconf.h (Glenn R-P) - Fixed memory leak in pngwrite.c (free info_ptr->text) (Glenn R-P) - Added more conditions for png_do_background, to avoid changing - black pixels to background when a background is supplied and - no pixels are transparent - Repaired PNG_NO_STDIO behavior - Tested NODIV support and made it default behavior (Greg Roelofs) - Added "-m" option and PNGTEST_DEBUG_MEMORY to pngtest (John Bowler) - Regularized version numbering scheme and bumped shared-library major - version number to 2 to avoid problems with libpng 0.89 apps - (Greg Roelofs) - -Version 0.98 [January, 1998] - Cleaned up some typos in libpng.txt and in code documentation - Fixed memory leaks in pCAL chunk processing (Glenn R-P and John Bowler) - Cosmetic change "display_gamma" to "screen_gamma" in pngrtran.c - Changed recommendation about file_gamma for PC images to .51 from .45, - in example.c and libpng.txt, added comments to distinguish between - screen_gamma, viewing_gamma, and display_gamma. - Changed all references to RFC1152 to read RFC1123 and changed the - PNG_TIME_RFC1152_SUPPORTED macro to PNG_TIME_RFC1123_SUPPORTED - Added png_invert_alpha capability (Glenn R-P -- suggestion by Jon Vincent) - Changed srgb_intent from png_byte to int to avoid compiler bugs - -Version 0.99 [January 30, 1998] - Free info_ptr->text instead of end_info_ptr->text in pngread.c (John Bowler) - Fixed a longstanding "packswap" bug in pngtrans.c - Fixed some inconsistencies in pngconf.h that prevented compiling with - PNG_READ_GAMMA_SUPPORTED and PNG_READ_hIST_SUPPORTED undefined - Fixed some typos and made other minor rearrangement of libpng.txt (Andreas) - Changed recommendation about file_gamma for PC images to .50 from .51 in - example.c and libpng.txt, and changed file_gamma for sRGB images to .45 - Added a number of functions to access information from the png structure - png_get_image_height(), etc. (Glenn R-P, suggestion by Brad Pettit) - Added TARGET_MACOS similar to zlib-1.0.8 - Define PNG_ALWAYS_EXTERN when __MWERKS__ && WIN32 are defined - Added type casting to all png_malloc() function calls - -Version 0.99a [January 31, 1998] - Added type casts and parentheses to all returns that return a value.(Tim W.) - -Version 0.99b [February 4, 1998] - Added type cast png_uint_32 on malloc function calls where needed. - Changed type of num_hist from png_uint_32 to int (same as num_palette). - Added checks for rowbytes overflow, in case png_size_t is less than 32 bits. - Renamed makefile.elf to makefile.lnx. - -Version 0.99c [February 7, 1998] - More type casting. Removed erroneous overflow test in pngmem.c. - Added png_buffered_memcpy() and png_buffered_memset(), apply them to rowbytes. - Added UNIX manual pages libpng.3 (incorporating libpng.txt) and png.5. - -Version 0.99d [February 11, 1998] - Renamed "far_to_near()" "png_far_to_near()" - Revised libpng.3 - Version 99c "buffered" operations didn't work as intended. Replaced them - with png_memcpy_check() and png_memset_check(). - Added many "if (png_ptr == NULL) return" to quell compiler warnings about - unused png_ptr, mostly in pngget.c and pngset.c. - Check for overlength tRNS chunk present when indexed-color PLTE is read. - Cleaned up spelling errors in libpng.3/libpng.txt - Corrected a problem with png_get_tRNS() which returned undefined trans array - -Version 0.99e [February 28, 1998] - Corrected png_get_tRNS() again. - Add parentheses for easier reading of pngget.c, fixed "||" should be "&&". - Touched up example.c to make more of it compileable, although the entire - file still can't be compiled (Willem van Schaik) - Fixed a bug in png_do_shift() (Bryan Tsai) - Added a space in png.h prototype for png_write_chunk_start() - Replaced pngtest.png with one created with zlib 1.1.1 - Changed pngtest to report PASS even when file size is different (Jean-loup G.) - Corrected some logic errors in png_do_invert_alpha() (Chris Patterson) - -Version 0.99f [March 5, 1998] - Corrected a bug in pngpread() introduced in version 99c (Kevin Bracey) - Moved makefiles into a "scripts" directory, and added INSTALL instruction file - Added makefile.os2 and pngos2.def (A. Zabolotny) and makefile.s2x (W. Sebok) - Added pointers to "note on libpng versions" in makefile.lnx and README - Added row callback feature when reading and writing nonprogressive rows - and added a test of this feature in pngtest.c - Added user transform callbacks, with test of the feature in pngtest.c - -Version 0.99g [March 6, 1998, morning] - Minor changes to pngtest.c to suppress compiler warnings. - Removed "beta" language from documentation. - -Version 0.99h [March 6, 1998, evening] - Minor changes to previous minor changes to pngtest.c - Changed PNG_READ_NOT_FULLY_SUPPORTED to PNG_READ_TRANSFORMS_NOT_SUPPORTED - and added PNG_PROGRESSIVE_READ_NOT_SUPPORTED macro - Added user transform capability - -Version 1.00 [March 7, 1998] - Changed several typedefs in pngrutil.c - Added makefile.wat (Pawel Mrochen), updated makefile.tc3 (Willem van Schaik) - Replaced "while(1)" with "for(;;)" - Added PNGARG() to prototypes in pngtest.c and removed some prototypes - Updated some of the makefiles (Tom Lane) - Changed some typedefs (s_start, etc.) in pngrutil.c - Fixed dimensions of "short_months" array in pngwrite.c - Replaced ansi2knr.c with the one from jpeg-v6 - -Version 1.0.0 [March 8, 1998] - Changed name from 1.00 to 1.0.0 (Adam Costello) - Added smakefile.ppc (with SCOPTIONS.ppc) for Amiga PPC (Andreas Kleinert) - -Version 1.0.0a [March 9, 1998] - Fixed three bugs in pngrtran.c to make gamma+background handling consistent - (Greg Roelofs) - Changed format of the PNG_LIBPNG_VER integer to xyyzz instead of xyz - for major, minor, and bugfix releases. This is 10001. (Adam Costello, - Tom Lane) - Make months range from 1-12 in png_convert_to_rfc1123 - -Version 1.0.0b [March 13, 1998] - Quieted compiler complaints about two empty "for" loops in pngrutil.c - Minor changes to makefile.s2x - Removed #ifdef/#endif around a png_free() in pngread.c - -Version 1.0.1 [March 14, 1998] - Changed makefile.s2x to reduce security risk of using a relative pathname - Fixed some typos in the documentation (Greg). - Fixed a problem with value of "channels" returned by png_read_update_info() - -Version 1.0.1a [April 21, 1998] - Optimized Paeth calculations by replacing abs() function calls with intrinsics - plus other loop optimizations. Improves avg decoding speed by about 20%. - Commented out i386istic "align" compiler flags in makefile.lnx. - Reduced the default warning level in some makefiles, to make them consistent. - Removed references to IJG and JPEG in the ansi2knr.c copyright statement. - Fixed a bug in png_do_strip_filler with XXRRGGBB => RRGGBB transformation. - Added grayscale and 16-bit capability to png_do_read_filler(). - Fixed a bug in pngset.c, introduced in version 0.99c, that sets rowbytes - too large when writing an image with bit_depth < 8 (Bob Dellaca). - Corrected some bugs in the experimental weighted filtering heuristics. - Moved a misplaced pngrutil code block that truncates tRNS if it has more - than num_palette entries -- test was done before num_palette was defined. - Fixed a png_convert_to_rfc1123() bug that converts day 31 to 0 (Steve Eddins). - Changed compiler flags in makefile.wat for better optimization - (Pawel Mrochen). - -Version 1.0.1b [May 2, 1998] - Relocated png_do_gray_to_rgb() within png_do_read_transformations() (Greg). - Relocated the png_composite macros from pngrtran.c to png.h (Greg). - Added makefile.sco (contributed by Mike Hopkirk). - Fixed two bugs (missing definitions of "istop") introduced in libpng-1.0.1a. - Fixed a bug in pngrtran.c that would set channels=5 under some circumstances. - More work on the Paeth-filtering, achieving imperceptible speedup - (A Kleinert). - More work on loop optimization which may help when compiled with C++ - compilers. - Added warnings when people try to use transforms they've defined out. - Collapsed 4 "i" and "c" loops into single "i" loops in pngrtran and pngwtran. - Revised paragraph about png_set_expand() in libpng.txt and libpng.3 (Greg) - -Version 1.0.1c [May 11, 1998] - Fixed a bug in pngrtran.c (introduced in libpng-1.0.1a) where the masks for - filler bytes should have been 0xff instead of 0xf. - Added max_pixel_depth=32 in pngrutil.c when using FILLER with palette images. - Moved PNG_WRITE_WEIGHTED_FILTER_SUPPORTED and PNG_WRITE_FLUSH_SUPPORTED - out of the PNG_WRITE_TRANSFORMS_NOT_SUPPORTED block of pngconf.h - Added "PNG_NO_WRITE_TRANSFORMS" etc., as alternatives for *_NOT_SUPPORTED, - for consistency, in pngconf.h - Added individual "ifndef PNG_NO_[CAPABILITY]" in pngconf.h to make it easier - to remove unwanted capabilities via the compile line - Made some corrections to grammar (which, it's) in documentation (Greg). - Corrected example.c, use of row_pointers in png_write_image(). - -Version 1.0.1d [May 24, 1998] - Corrected several statements that used side effects illegally in pngrutil.c - and pngtrans.c, that were introduced in version 1.0.1b - Revised png_read_rows() to avoid repeated if-testing for NULL (A Kleinert) - More corrections to example.c, use of row_pointers in png_write_image() - and png_read_rows(). - Added pngdll.mak and pngdef.pas to scripts directory, contributed by - Bob Dellaca, to make a png32bd.dll with Borland C++ 4.5 - Fixed error in example.c with png_set_text: num_text is 3, not 2 (Guido V.) - Changed several loops from count-down to count-up, for consistency. - -Version 1.0.1e [June 6, 1998] - Revised libpng.txt and libpng.3 description of png_set_read|write_fn(), and - added warnings when people try to set png_read_fn and png_write_fn in - the same structure. - Added a test such that png_do_gamma will be done when num_trans==0 - for truecolor images that have defined a background. This corrects an - error that was introduced in libpng-0.90 that can cause gamma processing - to be skipped. - Added tests in png.h to include "trans" and "trans_values" in structures - when PNG_READ_BACKGROUND_SUPPORTED or PNG_READ_EXPAND_SUPPORTED is defined. - Add png_free(png_ptr->time_buffer) in png_destroy_read_struct() - Moved png_convert_to_rfc_1123() from pngwrite.c to png.c - Added capability for user-provided malloc_fn() and free_fn() functions, - and revised pngtest.c to demonstrate their use, replacing the - PNGTEST_DEBUG_MEM feature. - Added makefile.w32, for Microsoft C++ 4.0 and later (Tim Wegner). - -Version 1.0.2 [June 14, 1998] - Fixed two bugs in makefile.bor . - -Version 1.0.2a [December 30, 1998] - Replaced and extended code that was removed from png_set_filler() in 1.0.1a. - Fixed a bug in png_do_filler() that made it fail to write filler bytes in - the left-most pixel of each row (Kevin Bracey). - Changed "static pngcharp tIME_string" to "static char tIME_string[30]" - in pngtest.c (Duncan Simpson). - Fixed a bug in pngtest.c that caused pngtest to try to write a tIME chunk - even when no tIME chunk was present in the source file. - Fixed a problem in pngrutil.c: gray_to_rgb didn't always work with 16-bit. - Fixed a problem in png_read_push_finish_row(), which would not skip some - passes that it should skip, for images that are less than 3 pixels high. - Interchanged the order of calls to png_do_swap() and png_do_shift() - in pngwtran.c (John Cromer). - Added #ifdef PNG_DEBUG/#endif surrounding use of PNG_DEBUG in png.h . - Changed "bad adaptive filter type" from error to warning in pngrutil.c . - Fixed a documentation error about default filtering with 8-bit indexed-color. - Separated the PNG_NO_STDIO macro into PNG_NO_STDIO and PNG_NO_CONSOLE_IO - (L. Peter Deutsch). - Added png_set_rgb_to_gray() and png_get_rgb_to_gray_status() functions. - Added png_get_copyright() and png_get_header_version() functions. - Revised comments on png_set_progressive_read_fn() in libpng.txt and example.c - Added information about debugging in libpng.txt and libpng.3 . - Changed "ln -sf" to "ln -s -f" in makefile.s2x, makefile.lnx, and - makefile.sco. - Removed lines after Dynamic Dependencies" in makefile.aco . - Revised makefile.dec to make a shared library (Jeremie Petit). - Removed trailing blanks from all files. - -Version 1.0.2a [January 6, 1999] - Removed misplaced #endif and #ifdef PNG_NO_EXTERN near the end of png.h - Added "if" tests to silence complaints about unused png_ptr in png.h and png.c - Changed "check_if_png" function in example.c to return true (nonzero) if PNG. - Changed libpng.txt to demonstrate png_sig_cmp() instead of png_check_sig() - which is obsolete. - -Version 1.0.3 [January 14, 1999] - Added makefile.hux, for Hewlett Packard HPUX 10.20 and 11.00 (Jim Rice) - Added a statement of Y2K compliance in png.h, libpng.3, and Y2KINFO. - -Version 1.0.3a [August 12, 1999] - Added check for PNG_READ_INTERLACE_SUPPORTED in pngread.c; issue a warning - if an attempt is made to read an interlaced image when it's not supported. - Added check if png_ptr->trans is defined before freeing it in pngread.c - Modified the Y2K statement to include versions back to version 0.71 - Fixed a bug in the check for valid IHDR bit_depth/color_types in pngrutil.c - Modified makefile.wat (added -zp8 flag, ".symbolic", changed some comments) - Replaced leading blanks with tab characters in makefile.hux - Changed "dworkin.wustl.edu" to "ccrc.wustl.edu" in various documents. - Changed (float)red and (float)green to (double)red, (double)green - in png_set_rgb_to_gray() to avoid "promotion" problems in AIX. - Fixed a bug in pngconf.h that omitted when PNG_DEBUG==0 (K Bracey). - Reformatted libpng.3 and libpngpf.3 with proper fonts (script by J. vanZandt). - Updated documentation to refer to the PNG-1.2 specification. - Removed ansi2knr.c and left pointers to the latest source for ansi2knr.c - in makefile.knr, INSTALL, and README (L. Peter Deutsch) - Fixed bugs in calculation of the length of rowbytes when adding alpha - channels to 16-bit images, in pngrtran.c (Chris Nokleberg) - Added function png_set_user_transform_info() to store user_transform_ptr, - user_depth, and user_channels into the png_struct, and a function - png_get_user_transform_ptr() to retrieve the pointer (Chris Nokleberg) - Added function png_set_empty_plte_permitted() to make libpng useable - in MNG applications. - Corrected the typedef for png_free_ptr in png.h (Jesse Jones). - Correct gamma with srgb is 45455 instead of 45000 in pngrutil.c, to be - consistent with PNG-1.2, and allow variance of 500 before complaining. - Added assembler code contributed by Intel in file pngvcrd.c and modified - makefile.w32 to use it (Nirav Chhatrapati, INTEL Corporation, - Gilles Vollant) - Changed "ln -s -f" to "ln -f -s" in the makefiles to make Solaris happy. - Added some aliases for png_set_expand() in pngrtran.c, namely - png_set_expand_PLTE(), png_set_expand_depth(), and png_set_expand_tRNS() - (Greg Roelofs, in "PNG: The Definitive Guide"). - Added makefile.beo for BEOS on X86, contributed by Sander Stok. - -Version 1.0.3b [August 26, 1999] - Replaced 2147483647L several places with PNG_MAX_UINT macro, defined in png.h - Changed leading blanks to tabs in all makefiles. - Define PNG_USE_PNGVCRD in makefile.w32, to get MMX assembler code. - Made alternate versions of png_set_expand() in pngrtran.c, namely - png_set_gray_1_2_4_to_8, png_set_palette_to_rgb, and png_set_tRNS_to_alpha - (Greg Roelofs, in "PNG: The Definitive Guide"). Deleted the 1.0.3a aliases. - Relocated start of 'extern "C"' block in png.h so it doesn't include pngconf.h - Revised calculation of num_blocks in pngmem.c to avoid a potentially - negative shift distance, whose results are undefined in the C language. - Added a check in pngset.c to prevent writing multiple tIME chunks. - Added a check in pngwrite.c to detect invalid small window_bits sizes. - -Version 1.0.3d [September 4, 1999] - Fixed type casting of igamma in pngrutil.c - Added new png_expand functions to scripts/pngdef.pas and pngos2.def - Added a demo read_user_transform_fn that examines the row filters in pngtest.c - -Version 1.0.4 [September 24, 1999, not distributed publicly] - Define PNG_ALWAYS_EXTERN in pngconf.h if __STDC__ is defined - Delete #define PNG_INTERNAL and include "png.h" from pngasmrd.h - Made several minor corrections to pngtest.c - Renamed the makefiles with longer but more user friendly extensions. - Copied the PNG copyright and license to a separate LICENSE file. - Revised documentation, png.h, and example.c to remove reference to - "viewing_gamma" which no longer appears in the PNG specification. - Revised pngvcrd.c to use MMX code for interlacing only on the final pass. - Updated pngvcrd.c to use the faster C filter algorithms from libpng-1.0.1a - Split makefile.win32vc into two versions, makefile.vcawin32 (uses MMX - assembler code) and makefile.vcwin32 (doesn't). - Added a CPU timing report to pngtest.c (enabled by defining PNGTEST_TIMING) - Added a copy of pngnow.png to the distribution. - -Version 1.0.4a [September 25, 1999] - Increase max_pixel_depth in pngrutil.c if a user transform needs it. - Changed several division operations to right-shifts in pngvcrd.c - -Version 1.0.4b [September 30, 1999] - Added parentheses in line 3732 of pngvcrd.c - Added a comment in makefile.linux warning about buggy -O3 in pgcc 2.95.1 - -Version 1.0.4c [October 1, 1999] - Added a "png_check_version" function in png.c and pngtest.c that will generate - a helpful compiler error if an old png.h is found in the search path. - Changed type of png_user_transform_depth|channels from int to png_byte. - Added "Libpng is OSI Certified Open Source Software" statement to png.h - -Version 1.0.4d [October 6, 1999] - Changed 0.45 to 0.45455 in png_set_sRGB() - Removed unused PLTE entries from pngnow.png - Re-enabled some parts of pngvcrd.c (png_combine_row) that work properly. - -Version 1.0.4e [October 10, 1999] - Fixed sign error in pngvcrd.c (Greg Roelofs) - Replaced some instances of memcpy with simple assignments in pngvcrd (GR-P) - -Version 1.0.4f [October 15, 1999] - Surrounded example.c code with #if 0 .. #endif to prevent people from - inadvertently trying to compile it. - Changed png_get_header_version() from a function to a macro in png.h - Added type casting mostly in pngrtran.c and pngwtran.c - Removed some pointless "ptr = NULL" in pngmem.c - Added a "contrib" directory containing the source code from Greg's book. - -Version 1.0.5 [October 15, 1999] - Minor editing of the INSTALL and README files. - -Version 1.0.5a [October 23, 1999] - Added contrib/pngsuite and contrib/pngminus (Willem van Schaik) - Fixed a typo in the png_set_sRGB() function call in example.c (Jan Nijtmans) - Further optimization and bugfix of pngvcrd.c - Revised pngset.c so that it does not allocate or free memory in the user's - text_ptr structure. Instead, it makes its own copy. - Created separate write_end_info_struct in pngtest.c for a more severe test. - Added code in pngwrite.c to free info_ptr->text[i].key to stop a memory leak. - -Version 1.0.5b [November 23, 1999] - Moved PNG_FLAG_HAVE_CHUNK_HEADER, PNG_FLAG_BACKGROUND_IS_GRAY and - PNG_FLAG_WROTE_tIME from flags to mode. - Added png_write_info_before_PLTE() function. - Fixed some typecasting in contrib/gregbook/*.c - Updated scripts/makevms.com and added makevms.com to contrib/gregbook - and contrib/pngminus (Martin Zinser) - -Version 1.0.5c [November 26, 1999] - Moved png_get_header_version from png.h to png.c, to accommodate ansi2knr. - Removed all global arrays (according to PNG_NO_GLOBAL_ARRAYS macro), to - accommodate making DLL's: Moved usr_png_ver from global variable to function - png_get_header_ver() in png.c. Moved png_sig to png_sig_bytes in png.c and - eliminated use of png_sig in pngwutil.c. Moved the various png_CHNK arrays - into pngtypes.h. Eliminated use of global png_pass arrays. Declared the - png_CHNK and png_pass arrays to be "const". Made the global arrays - available to applications (although none are used in libpng itself) when - PNG_NO_GLOBAL_ARRAYS is not defined or when PNG_GLOBAL_ARRAYS is defined. - Removed some extraneous "-I" from contrib/pngminus/makefile.std - Changed the PNG_sRGB_INTENT macros in png.h to be consistent with PNG-1.2. - Change PNG_SRGB_INTENT to PNG_sRGB_INTENT in libpng.txt and libpng.3 - -Version 1.0.5d [November 29, 1999] - Add type cast (png_const_charp) two places in png.c - Eliminated pngtypes.h; use macros instead to declare PNG_CHNK arrays. - Renamed "PNG_GLOBAL_ARRAYS" to "PNG_USE_GLOBAL_ARRAYS" and made available - to applications a macro "PNG_USE_LOCAL_ARRAYS". - comment out (with #ifdef) all the new declarations when - PNG_USE_GLOBAL_ARRAYS is defined. - Added PNG_EXPORT_VAR macro to accommodate making DLL's. - -Version 1.0.5e [November 30, 1999] - Added iCCP, iTXt, and sPLT support; added "lang" member to the png_text - structure; refactored the inflate/deflate support to make adding new chunks - with trailing compressed parts easier in the future, and added new functions - png_free_iCCP, png_free_pCAL, png_free_sPLT, png_free_text, png_get_iCCP, - png_get_spalettes, png_set_iCCP, png_set_spalettes (Eric S. Raymond). - NOTE: Applications that write text chunks MUST define png_text->lang - before calling png_set_text(). It must be set to NULL if you want to - write tEXt or zTXt chunks. If you want your application to be able to - run with older versions of libpng, use - - #ifdef PNG_iTXt_SUPPORTED - png_text[i].lang = NULL; - #endif - - Changed png_get_oFFs() and png_set_oFFs() to use signed rather than unsigned - offsets (Eric S. Raymond). - Combined PNG_READ_cHNK_SUPPORTED and PNG_WRITE_cHNK_SUPPORTED macros into - PNG_cHNK_SUPPORTED and combined the three types of PNG_text_SUPPORTED - macros, leaving the separate macros also available. - Removed comments on #endifs at the end of many short, non-nested #if-blocks. - -Version 1.0.5f [December 6, 1999] - Changed makefile.solaris to issue a warning about potential problems when - the ucb "ld" is in the path ahead of the ccs "ld". - Removed "- [date]" from the "synopsis" line in libpng.3 and libpngpf.3. - Added sCAL chunk support (Eric S. Raymond). - -Version 1.0.5g [December 7, 1999] - Fixed "png_free_spallettes" typo in png.h - Added code to handle new chunks in pngpread.c - Moved PNG_CHNK string macro definitions outside of PNG_NO_EXTERN block - Added "translated_key" to png_text structure and png_write_iTXt(). - Added code in pngwrite.c to work around a newly discovered zlib bug. - -Version 1.0.5h [December 10, 1999] - NOTE: regarding the note for version 1.0.5e, the following must also - be included in your code: - png_text[i].translated_key = NULL; - Unknown chunk handling is now supported. - Option to eliminate all floating point support was added. Some new - fixed-point functions such as png_set_gAMA_fixed() were added. - Expanded tabs and removed trailing blanks in source files. - -Version 1.0.5i [December 13, 1999] - Added some type casts to silence compiler warnings. - Renamed "png_free_spalette" to "png_free_spalettes" for consistency. - Removed leading blanks from a #define in pngvcrd.c - Added some parameters to the new png_set_keep_unknown_chunks() function. - Added a test for up->location != 0 in the first instance of writing - unknown chunks in pngwrite.c - Changed "num" to "i" in png_free_spalettes() and png_free_unknowns() to - prevent recursion. - Added png_free_hIST() function. - Various patches to fix bugs in the sCAL and integer cHRM processing, - and to add some convenience macros for use with sCAL. - -Version 1.0.5j [December 21, 1999] - Changed "unit" parameter of png_write_sCAL from png_byte to int, to work - around buggy compilers. - Added new type "png_fixed_point" for integers that hold float*100000 values - Restored backward compatibility of tEXt/zTXt chunk processing: - Restored the first four members of png_text to the same order as v.1.0.5d. - Added members "lang_key" and "itxt_length" to png_text struct. Set - text_length=0 when "text" contains iTXt data. Use the "compression" - member to distinguish among tEXt/zTXt/iTXt types. Added - PNG_ITXT_COMPRESSION_NONE (1) and PNG_ITXT_COMPRESSION_zTXt(2) macros. - The "Note" above, about backward incompatibility of libpng-1.0.5e, no - longer applies. - Fixed png_read|write_iTXt() to read|write parameters in the right order, - and to write the iTXt chunk after IDAT if it appears in the end_ptr. - Added pnggccrd.c, version of pngvcrd.c Intel assembler for gcc (Greg Roelofs) - Reversed the order of trying to write floating-point and fixed-point gAMA. - -Version 1.0.5k [December 27, 1999] - Added many parentheses, e.g., "if (a && b & c)" becomes "if (a && (b & c))" - Added png_handle_as_unknown() function (Glenn) - Added png_free_chunk_list() function and chunk_list and num_chunk_list members - of png_ptr. - Eliminated erroneous warnings about multiple sPLT chunks and sPLT-after-PLTE. - Fixed a libpng-1.0.5h bug in pngrutil.c that was issuing erroneous warnings - about ignoring incorrect gAMA with sRGB (gAMA was in fact not ignored) - Added png_free_tRNS(); png_set_tRNS() now malloc's its own trans array (ESR). - Define png_get_int_32 when oFFs chunk is supported as well as when pCAL is. - Changed type of proflen from png_int_32 to png_uint_32 in png_get_iCCP(). - -Version 1.0.5l [January 1, 2000] - Added functions png_set_read_user_chunk_fn() and png_get_user_chunk_ptr() - for setting a callback function to handle unknown chunks and for - retrieving the associated user pointer (Glenn). - -Version 1.0.5m [January 7, 2000] - Added high-level functions png_read_png(), png_write_png(), png_free_pixels(). - -Version 1.0.5n [January 9, 2000] - Added png_free_PLTE() function, and modified png_set_PLTE() to malloc its - own memory for info_ptr->palette. This makes it safe for the calling - application to free its copy of the palette any time after it calls - png_set_PLTE(). - -Version 1.0.5o [January 20, 2000] - Cosmetic changes only (removed some trailing blanks and TABs) - -Version 1.0.5p [January 31, 2000] - Renamed pngdll.mak to makefile.bd32 - Cosmetic changes in pngtest.c - -Version 1.0.5q [February 5, 2000] - Relocated the makefile.solaris warning about PATH problems. - Fixed pngvcrd.c bug by pushing/popping registers in mmxsupport (Bruce Oberg) - Revised makefile.gcmmx - Added PNG_SETJMP_SUPPORTED, PNG_SETJMP_NOT_SUPPORTED, and PNG_ABORT() macros - -Version 1.0.5r [February 7, 2000] - Removed superfluous prototype for png_get_itxt from png.h - Fixed a bug in pngrtran.c that improperly expanded the background color. - Return *num_text=0 from png_get_text() when appropriate, and fix documentation - of png_get_text() in libpng.txt/libpng.3. - -Version 1.0.5s [February 18, 2000] - Added "png_jmp_env()" macro to pngconf.h, to help people migrate to the - new error handler that's planned for the next libpng release, and changed - example.c, pngtest.c, and contrib programs to use this macro. - Revised some of the DLL-export macros in pngconf.h (Greg Roelofs) - Fixed a bug in png_read_png() that caused it to fail to expand some images - that it should have expanded. - Fixed some mistakes in the unused and undocumented INCH_CONVERSIONS functions - in pngget.c - Changed the allocation of palette, history, and trans arrays back to - the version 1.0.5 method (linking instead of copying) which restores - backward compatibility with version 1.0.5. Added some remarks about - that in example.c. Added "free_me" member to info_ptr and png_ptr - and added png_free_data() function. - Updated makefile.linux and makefile.gccmmx to make directories conditionally. - Made cosmetic changes to pngasmrd.h - Added png_set_rows() and png_get_rows(), for use with png_read|write_png(). - Modified png_read_png() to allocate info_ptr->row_pointers only if it - hasn't already been allocated. - -Version 1.0.5t [March 4, 2000] - Changed png_jmp_env() migration aiding macro to png_jmpbuf(). - Fixed "interlace" typo (should be "interlaced") in contrib/gregbook/read2-x.c - Fixed bug with use of PNG_BEFORE_IHDR bit in png_ptr->mode, introduced when - PNG_FLAG_HAVE_CHUNK_HEADER was moved into png_ptr->mode in version 1.0.5b - Files in contrib/gregbook were revised to use png_jmpbuf() and to select - a 24-bit visual if one is available, and to allow abbreviated options. - Files in contrib/pngminus were revised to use the png_jmpbuf() macro. - Removed spaces in makefile.linux and makefile.gcmmx, introduced in 1.0.5s - -Version 1.0.5u [March 5, 2000] - Simplified the code that detects old png.h in png.c and pngtest.c - Renamed png_spalette (_p, _pp) to png_sPLT_t (_tp, _tpp) - Increased precision of rgb_to_gray calculations from 8 to 15 bits and - added png_set_rgb_to_gray_fixed() function. - Added makefile.bc32 (32-bit Borland C++, C mode) - -Version 1.0.5v [March 11, 2000] - Added some parentheses to the png_jmpbuf macro definition. - Updated references to the zlib home page, which has moved to freesoftware.com. - Corrected bugs in documentation regarding png_read_row() and png_write_row(). - Updated documentation of png_rgb_to_gray calculations in libpng.3/libpng.txt. - Renamed makefile.borland,turboc3 back to makefile.bor,tc3 as in version 1.0.3, - revised borland makefiles; added makefile.ibmvac3 and makefile.gcc (Cosmin) - -Version 1.0.6 [March 20, 2000] - Minor revisions of makefile.bor, libpng.txt, and gregbook/rpng2-win.c - Added makefile.sggcc (SGI IRIX with gcc) - -Version 1.0.6d [April 7, 2000] - Changed sprintf() to strcpy() in png_write_sCAL_s() to work without STDIO - Added data_length parameter to png_decompress_chunk() function - Revised documentation to remove reference to abandoned png_free_chnk functions - Fixed an error in png_rgb_to_gray_fixed() - Revised example.c, usage of png_destroy_write_struct(). - Renamed makefile.ibmvac3 to makefile.ibmc, added libpng.icc IBM project file - Added a check for info_ptr->free_me&PNG_FREE_TEXT when freeing text in png.c - Simplify png_sig_bytes() function to remove use of non-ISO-C strdup(). - -Version 1.0.6e [April 9, 2000] - Added png_data_freer() function. - In the code that checks for over-length tRNS chunks, added check of - info_ptr->num_trans as well as png_ptr->num_trans (Matthias Benckmann) - Minor revisions of libpng.txt/libpng.3. - Check for existing data and free it if the free_me flag is set, in png_set_*() - and png_handle_*(). - Only define PNG_WEIGHTED_FILTERS_SUPPORTED when PNG_FLOATING_POINT_SUPPORTED - is defined. - Changed several instances of PNG_NO_CONSOLE_ID to PNG_NO_STDIO in pngrutil.c - and mentioned the purposes of the two macros in libpng.txt/libpng.3. - -Version 1.0.6f [April 14, 2000] - Revised png_set_iCCP() and png_set_rows() to avoid prematurely freeing data. - Add checks in png_set_text() for NULL members of the input text structure. - Revised libpng.txt/libpng.3. - Removed superfluous prototype for png_set_iTXt from png.h - Removed "else" from pngread.c, after png_error(), and changed "0" to "length". - Changed several png_errors about malformed ancillary chunks to png_warnings. - -Version 1.0.6g [April 24, 2000] - Added png_pass-* arrays to pnggccrd.c when PNG_USE_LOCAL_ARRAYS is defined. - Relocated paragraph about png_set_background() in libpng.3/libpng.txt - and other revisions (Matthias Benckmann) - Relocated info_ptr->free_me, png_ptr->free_me, and other info_ptr and - png_ptr members to restore binary compatibility with libpng-1.0.5 - (breaks compatibility with libpng-1.0.6). - -Version 1.0.6h [April 24, 2000] - Changed shared library so-number pattern from 2.x.y.z to xy.z (this builds - libpng.so.10 & libpng.so.10.6h instead of libpng.so.2 & libpng.so.2.1.0.6h) - This is a temporary change for test purposes. - -Version 1.0.6i [May 2, 2000] - Rearranged some members at the end of png_info and png_struct, to put - unknown_chunks_num and free_me within the original size of the png_structs - and free_me, png_read_user_fn, and png_free_fn within the original png_info, - because some old applications allocate the structs directly instead of - using png_create_*(). - Added documentation of user memory functions in libpng.txt/libpng.3 - Modified png_read_png so that it will use user_allocated row_pointers - if present, unless free_me directs that it be freed, and added description - of the use of png_set_rows() and png_get_rows() in libpng.txt/libpng.3. - Added PNG_LEGACY_SUPPORTED macro, and #ifdef out all new (since version - 1.00) members of png_struct and png_info, to regain binary compatibility - when you define this macro. Capabilities lost in this event - are user transforms (new in version 1.0.0),the user transform pointer - (new in version 1.0.2), rgb_to_gray (new in 1.0.5), iCCP, sCAL, sPLT, - the high-level interface, and unknown chunks support (all new in 1.0.6). - This was necessary because of old applications that allocate the structs - directly as authors were instructed to do in libpng-0.88 and earlier, - instead of using png_create_*(). - Added modes PNG_CREATED_READ_STRUCT and PNG_CREATED_WRITE_STRUCT which - can be used to detect codes that directly allocate the structs, and - code to check these modes in png_read_init() and png_write_init() and - generate a libpng error if the modes aren't set and PNG_LEGACY_SUPPORTED - was not defined. - Added makefile.intel and updated makefile.watcom (Pawel Mrochen) - -Version 1.0.6j [May 3, 2000] - Overloaded png_read_init() and png_write_init() with macros that convert - calls to png_read_init_2() or png_write_init_2() that check the version - and structure sizes. - -Version 1.0.7beta11 [May 7, 2000] - Removed the new PNG_CREATED_READ_STRUCT and PNG_CREATED_WRITE_STRUCT modes - which are no longer used. - Eliminated the three new members of png_text when PNG_LEGACY_SUPPORTED is - defined or when neither PNG_READ_iTXt_SUPPORTED nor PNG_WRITE_iTXt_SUPPORTED - is defined. - Made PNG_NO_READ|WRITE_iTXt the default setting, to avoid memory - overrun when old applications fill the info_ptr->text structure directly. - Added PNGAPI macro, and added it to the definitions of all exported functions. - Relocated version macro definitions ahead of the includes of zlib.h and - pngconf.h in png.h. - -Version 1.0.7beta12 [May 12, 2000] - Revised pngset.c to avoid a problem with expanding the png_debug macro. - Deleted some extraneous defines from pngconf.h - Made PNG_NO_CONSOLE_IO the default condition when PNG_BUILD_DLL is defined. - Use MSC _RPTn debugging instead of fprintf if _MSC_VER is defined. - Added png_access_version_number() function. - Check for mask&PNG_FREE_CHNK (for TEXT, SCAL, PCAL) in png_free_data(). - Expanded libpng.3/libpng.txt information about png_data_freer(). - -Version 1.0.7beta14 [May 17, 2000] (beta13 was not published) - Changed pnggccrd.c and pngvcrd.c to handle bad adaptive filter types as - warnings instead of errors, as pngrutil.c does. - Set the PNG_INFO_IDAT valid flag in png_set_rows() so png_write_png() - will actually write IDATs. - Made the default PNG_USE_LOCAL_ARRAYS depend on PNG_DLL instead of WIN32. - Make png_free_data() ignore its final parameter except when freeing data - that can have multiple instances (text, sPLT, unknowns). - Fixed a new bug in png_set_rows(). - Removed info_ptr->valid tests from png_free_data(), as in version 1.0.5. - Added png_set_invalid() function. - Fixed incorrect illustrations of png_destroy_write_struct() in example.c. - -Version 1.0.7beta15 [May 30, 2000] - Revised the deliberately erroneous Linux setjmp code in pngconf.h to produce - fewer error messages. - Rearranged checks for Z_OK to check the most likely path first in pngpread.c - and pngwutil.c. - Added checks in pngtest.c for png_create_*() returning NULL, and mentioned - in libpng.txt/libpng.3 the need for applications to check this. - Changed names of png_default_*() functions in pngtest to pngtest_*(). - Changed return type of png_get_x|y_offset_*() from png_uint_32 to png_int_32. - Fixed some bugs in the unused PNG_INCH_CONVERSIONS functions in pngget.c - Set each pointer to NULL after freeing it in png_free_data(). - Worked around a problem in pngconf.h; AIX's strings.h defines an "index" - macro that conflicts with libpng's png_color_16.index. (Dimitri - Papadapoulos) - Added "msvc" directory with MSVC++ project files (Simon-Pierre Cadieux). - -Version 1.0.7beta16 [June 4, 2000] - Revised the workaround of AIX string.h "index" bug. - Added a check for overlength PLTE chunk in pngrutil.c. - Added PNG_NO_POINTER_INDEXING macro to use array-indexing instead of pointer - indexing in pngrutil.c and pngwutil.c to accommodate a buggy compiler. - Added a warning in png_decompress_chunk() when it runs out of data, e.g. - when it tries to read an erroneous PhotoShop iCCP chunk. - Added PNG_USE_DLL macro. - Revised the copyright/disclaimer/license notice. - Added contrib/msvctest directory - -Version 1.0.7rc1 [June 9, 2000] - Corrected the definition of PNG_TRANSFORM_INVERT_ALPHA (0x0400 not 0x0200) - Added contrib/visupng directory (Willem van Schaik) - -Version 1.0.7beta18 [June 23, 2000] - Revised PNGAPI definition, and pngvcrd.c to work with __GCC__ - and do not redefine PNGAPI if it is passed in via a compiler directive. - Revised visupng/PngFile.c to remove returns from within the Try block. - Removed leading underscores from "_PNG_H" and "_PNG_SAVE_BSD_SOURCE" macros. - Updated contrib/visupng/cexcept.h to version 1.0.0. - Fixed bugs in pngwrite.c and pngwutil.c that prevented writing iCCP chunks. - -Version 1.0.7rc2 [June 28, 2000] - Updated license to include disclaimers required by UCITA. - Fixed "DJBPP" typo in pnggccrd.c introduced in beta18. - -Version 1.0.7 [July 1, 2000] - Revised the definition of "trans_values" in libpng.3/libpng.txt - -Version 1.0.8beta1 [July 8, 2000] - Added png_free(png_ptr, key) two places in pngpread.c to stop memory leaks. - Changed PNG_NO_STDIO to PNG_NO_CONSOLE_IO, several places in pngrutil.c and - pngwutil.c. - Changed PNG_EXPORT_VAR to use PNG_IMPEXP, in pngconf.h. - Removed unused "#include " from png.c - Added WindowsCE support. - Revised pnggccrd.c to work with gcc-2.95.2 and in the Cygwin environment. - -Version 1.0.8beta2 [July 10, 2000] - Added project files to the wince directory and made further revisions - of pngtest.c, pngrio.c, and pngwio.c in support of WindowsCE. - -Version 1.0.8beta3 [July 11, 2000] - Only set the PNG_FLAG_FREE_TRNS or PNG_FREE_TRNS flag in png_handle_tRNS() - for indexed-color input files to avoid potential double-freeing trans array - under some unusual conditions; problem was introduced in version 1.0.6f. - Further revisions to pngtest.c and files in the wince subdirectory. - -Version 1.0.8beta4 [July 14, 2000] - Added the files pngbar.png and pngbar.jpg to the distribution. - Added makefile.cygwin, and cygwin support in pngconf.h - Added PNG_NO_ZALLOC_ZERO macro (makes png_zalloc skip zeroing memory) - -Version 1.0.8rc1 [July 16, 2000] - Revised png_debug() macros and statements to eliminate compiler warnings. - -Version 1.0.8 [July 24, 2000] - Added png_flush() in pngwrite.c, after png_write_IEND(). - Updated makefile.hpux to build a shared library. - -Version 1.0.9beta1 [November 10, 2000] - Fixed typo in scripts/makefile.hpux - Updated makevms.com in scripts and contrib/* and contrib/* (Martin Zinser) - Fixed seqence-point bug in contrib/pngminus/png2pnm (Martin Zinser) - Changed "cdrom.com" in documentation to "libpng.org" - Revised pnggccrd.c to get it all working, and updated makefile.gcmmx (Greg). - Changed type of "params" from voidp to png_voidp in png_read|write_png(). - Make sure PNGAPI and PNG_IMPEXP are defined in pngconf.h. - Revised the 3 instances of WRITEFILE in pngtest.c. - Relocated "msvc" and "wince" project subdirectories into "dll" subdirectory. - Updated png.rc in dll/msvc project - Revised makefile.dec to define and use LIBPATH and INCPATH - Increased size of global png_libpng_ver[] array from 12 to 18 chars. - Made global png_libpng_ver[], png_sig[] and png_pass_*[] arrays const. - Removed duplicate png_crc_finish() from png_handle_bKGD() function. - Added a warning when application calls png_read_update_info() multiple times. - Revised makefile.cygwin - Fixed bugs in iCCP support in pngrutil.c and pngwutil.c. - Replaced png_set_empty_plte_permitted() with png_permit_mng_features(). - -Version 1.0.9beta2 [November 19, 2000] - Renamed the "dll" subdirectory "projects". - Added borland project files to "projects" subdirectory. - Set VS_FF_PRERELEASE and VS_FF_PATCHED flags in msvc/png.rc when appropriate. - Add error message in png_set_compression_buffer_size() when malloc fails. - -Version 1.0.9beta3 [November 23, 2000] - Revised PNG_LIBPNG_BUILD_TYPE macro in png.h, used in the msvc project. - Removed the png_flush() in pngwrite.c that crashes some applications - that don't set png_output_flush_fn. - Added makefile.macosx and makefile.aix to scripts directory. - -Version 1.0.9beta4 [December 1, 2000] - Change png_chunk_warning to png_warning in png_check_keyword(). - Increased the first part of msg buffer from 16 to 18 in png_chunk_error(). - -Version 1.0.9beta5 [December 15, 2000] - Added support for filter method 64 (for PNG datastreams embedded in MNG). - -Version 1.0.9beta6 [December 18, 2000] - Revised png_set_filter() to accept filter method 64 when appropriate. - Added new PNG_HAVE_PNG_SIGNATURE bit to png_ptr->mode and use it to - help prevent applications from using MNG features in PNG datastreams. - Added png_permit_mng_features() function. - Revised libpng.3/libpng.txt. Changed "filter type" to "filter method". - -Version 1.0.9rc1 [December 23, 2000] - Revised test for PNG_HAVE_PNG_SIGNATURE in pngrutil.c - Fixed error handling of unknown compression type in png_decompress_chunk(). - In pngconf.h, define __cdecl when _MSC_VER is defined. - -Version 1.0.9beta7 [December 28, 2000] - Changed PNG_TEXT_COMPRESSION_zTXt to PNG_COMPRESSION_TYPE_BASE several places. - Revised memory management in png_set_hIST and png_handle_hIST in a backward - compatible manner. PLTE and tRNS were revised similarly. - Revised the iCCP chunk reader to ignore trailing garbage. - -Version 1.0.9beta8 [January 12, 2001] - Moved pngasmrd.h into pngconf.h. - Improved handling of out-of-spec garbage iCCP chunks generated by PhotoShop. - -Version 1.0.9beta9 [January 15, 2001] - Added png_set_invalid, png_permit_mng_features, and png_mmx_supported to - wince and msvc project module definition files. - Minor revision of makefile.cygwin. - Fixed bug with progressive reading of narrow interlaced images in pngpread.c - -Version 1.0.9beta10 [January 16, 2001] - Do not typedef png_FILE_p in pngconf.h when PNG_NO_STDIO is defined. - Fixed "png_mmx_supported" typo in project definition files. - -Version 1.0.9beta11 [January 19, 2001] - Updated makefile.sgi to make shared library. - Removed png_mmx_support() function and disabled PNG_MNG_FEATURES_SUPPORTED - by default, for the benefit of DLL forward compatibility. These will - be re-enabled in version 1.2.0. - -Version 1.0.9rc2 [January 22, 2001] - Revised cygwin support. - -Version 1.0.9 [January 31, 2001] - Added check of cygwin's ALL_STATIC in pngconf.h - Added "-nommx" parameter to contrib/gregbook/rpng2-win and rpng2-x demos. - -Version 1.0.10beta1 [March 14, 2001] - Revised makefile.dec, makefile.sgi, and makefile.sggcc; added makefile.hpgcc. - Reformatted libpng.3 to eliminate bad line breaks. - Added checks for _mmx_supported in the read_filter_row function of pnggccrd.c - Added prototype for png_mmx_support() near the top of pnggccrd.c - Moved some error checking from png_handle_IHDR to png_set_IHDR. - Added PNG_NO_READ_SUPPORTED and PNG_NO_WRITE_SUPPORTED macros. - Revised png_mmx_support() function in pnggccrd.c - Restored version 1.0.8 PNG_WRITE_EMPTY_PLTE_SUPPORTED behavior in pngwutil.c - Fixed memory leak in contrib/visupng/PngFile.c - Fixed bugs in png_combine_row() in pnggccrd.c and pngvcrd.c (C version) - Added warnings when retrieving or setting gamma=0. - Increased the first part of msg buffer from 16 to 18 in png_chunk_warning(). - -Version 1.0.10rc1 [March 23, 2001] - Changed all instances of memcpy, strcpy, and strlen to png_memcpy, png_strcpy, - and png_strlen. - Revised png_mmx_supported() function in pnggccrd.c to return proper value. - Fixed bug in progressive reading (pngpread.c) with small images (height < 8). - -Version 1.0.10 [March 30, 2001] - Deleted extraneous space (introduced in 1.0.9) from line 42 of makefile.cygwin - Added beos project files (Chris Herborth) - -Version 1.0.11beta1 [April 3, 2001] - Added type casts on several png_malloc() calls (Dimitri Papadapoulos). - Removed a no-longer needed AIX work-around from pngconf.h - Changed several "//" single-line comments to C-style in pnggccrd.c - -Version 1.0.11beta2 [April 11, 2001] - Removed PNGAPI from several functions whose prototypes did not have PNGAPI. - Updated scripts/pngos2.def - -Version 1.0.11beta3 [April 14, 2001] - Added checking the results of many instances of png_malloc() for NULL - -Version 1.0.11beta4 [April 20, 2001] - Undid the changes from version 1.0.11beta3. Added a check for NULL return - from user's malloc_fn(). - Removed some useless type casts of the NULL pointer. - Added makefile.netbsd - -Version 1.0.11 [April 27, 2001] - Revised makefile.netbsd - -Version 1.0.12beta1 [May 14, 2001] - Test for Windows platform in pngconf.h when including malloc.h (Emmanuel Blot) - Updated makefile.cygwin and handling of Cygwin's ALL_STATIC in pngconf.h - Added some never-to-be-executed code in pnggccrd.c to quiet compiler warnings. - Eliminated the png_error about apps using png_read|write_init(). Instead, - libpng will reallocate the png_struct and info_struct if they are too small. - This retains future binary compatibility for old applications written for - libpng-0.88 and earlier. - -Version 1.2.0beta1 [May 6, 2001] - Bumped DLLNUM to 2. - Re-enabled PNG_MNG_FEATURES_SUPPORTED and enabled PNG_ASSEMBLER_CODE_SUPPORTED - by default. - Added runtime selection of MMX features. - Added png_set_strip_error_numbers function and related macros. - -Version 1.2.0beta2 [May 7, 2001] - Finished merging 1.2.0beta1 with version 1.0.11 - Added a check for attempts to read or write PLTE in grayscale PNG datastreams. - -Version 1.2.0beta3 [May 17, 2001] - Enabled user memory function by default. - Modified png_create_struct so it passes user mem_ptr to user memory allocator. - Increased png_mng_features flag from png_byte to png_uint_32. - Bumped shared-library (so-number) and dll-number to 3. - -Version 1.2.0beta4 [June 23, 2001] - Check for missing profile length field in iCCP chunk and free chunk_data - in case of truncated iCCP chunk. - Bumped shared-library number to 3 in makefile.sgi and makefile.sggcc - Bumped dll-number from 2 to 3 in makefile.cygwin - Revised contrib/gregbook/rpng*-x.c to avoid a memory leak and to exit cleanly - if user attempts to run it on an 8-bit display. - Updated contrib/gregbook - Use png_malloc instead of png_zalloc to allocate palette in pngset.c - Updated makefile.ibmc - Added some typecasts to eliminate gcc 3.0 warnings. Changed prototypes - of png_write_oFFS width and height from png_uint_32 to png_int_32. - Updated example.c - Revised prototypes for png_debug_malloc and png_debug_free in pngtest.c - -Version 1.2.0beta5 [August 8, 2001] - Revised contrib/gregbook - Revised makefile.gcmmx - Revised pnggccrd.c to conditionally compile some thread-unsafe code only - when PNG_THREAD_UNSAFE_OK is defined. - Added tests to prevent pngwutil.c from writing a bKGD or tRNS chunk with - value exceeding 2^bit_depth-1 - Revised makefile.sgi and makefile.sggcc - Replaced calls to fprintf(stderr,...) with png_warning() in pnggccrd.c - Removed restriction that do_invert_mono only operate on 1-bit opaque files - -Version 1.2.0 [September 1, 2001] - Changed a png_warning() to png_debug() in pnggccrd.c - Fixed contrib/gregbook/rpng-x.c, rpng2-x.c to avoid crash with XFreeGC(). - -Version 1.2.1beta1 [October 19, 2001] - Revised makefile.std in contrib/pngminus - Include background_1 in png_struct regardless of gamma support. - Revised makefile.netbsd and makefile.macosx, added makefile.darwin. - Revised example.c to provide more details about using row_callback(). - -Version 1.2.1beta2 [October 25, 2001] - Added type cast to each NULL appearing in a function call, except for - WINCE functions. - Added makefile.so9. - -Version 1.2.1beta3 [October 27, 2001] - Removed type casts from all NULLs. - Simplified png_create_struct_2(). - -Version 1.2.1beta4 [November 7, 2001] - Revised png_create_info_struct() and png_creat_struct_2(). - Added error message if png_write_info() was omitted. - Type cast NULLs appearing in function calls when _NO_PROTO or - PNG_TYPECAST_NULL is defined. - -Version 1.2.1rc1 [November 24, 2001] - Type cast NULLs appearing in function calls except when PNG_NO_TYPECAST_NULL - is defined. - Changed typecast of "size" argument to png_size_t in pngmem.c calls to - the user malloc_fn, to agree with the prototype in png.h - Added a pop/push operation to pnggccrd.c, to preserve Eflag (Maxim Sobolev) - Updated makefile.sgi to recognize LIBPATH and INCPATH. - Updated various makefiles so "make clean" does not remove previous major - version of the shared library. - -Version 1.2.1rc2 [December 4, 2001] - Always allocate 256-entry internal palette, hist, and trans arrays, to - avoid out-of-bounds memory reference caused by invalid PNG datastreams. - Added a check for prefix_length > data_length in iCCP chunk handler. - -Version 1.2.1 [December 7, 2001] - None. - -Version 1.2.2beta1 [February 22, 2002] - Fixed a bug with reading the length of iCCP profiles (Larry Reeves). - Revised makefile.linux, makefile.gcmmx, and makefile.sgi to generate - libpng.a, libpng12.so (not libpng.so.3), and libpng12/png.h - Revised makefile.darwin to remove "-undefined suppress" option. - Added checks for gamma and chromaticity values over 21474.83, which exceed - the limit for PNG unsigned 32-bit integers when encoded. - Revised calls to png_create_read_struct() and png_create_write_struct() - for simpler debugging. - Revised png_zalloc() so zlib handles errors (uses PNG_FLAG_MALLOC_NULL_MEM_OK) - -Version 1.2.2beta2 [February 23, 2002] - Check chunk_length and idat_size for invalid (over PNG_MAX_UINT) lengths. - Check for invalid image dimensions in png_get_IHDR. - Added missing "fi;" in the install target of the SGI makefiles. - Added install-static to all makefiles that make shared libraries. - Always do gamma compensation when image is partially transparent. - -Version 1.2.2beta3 [March 7, 2002] - Compute background.gray and background_1.gray even when color_type is RGB - in case image gets reduced to gray later. - Modified shared-library makefiles to install pkgconfig/libpngNN.pc. - Export (with PNGAPI) png_zalloc, png_zfree, and png_handle_as_unknown - Removed unused png_write_destroy_info prototype from png.h - Eliminated incorrect use of width_mmx from pnggccrd.c in pixel_bytes == 8 case - Added install-shared target to all makefiles that make shared libraries. - Stopped a double free of palette, hist, and trans when not using free_me. - Added makefile.32sunu for Sun Ultra 32 and makefile.64sunu for Sun Ultra 64. - -Version 1.2.2beta4 [March 8, 2002] - Compute background.gray and background_1.gray even when color_type is RGB - in case image gets reduced to gray later (Jason Summers). - Relocated a misplaced /bin/rm in the "install-shared" makefile targets - Added PNG_1_0_X macro which can be used to build a 1.0.x-compatible library. - -Version 1.2.2beta5 [March 26, 2002] - Added missing PNGAPI to several function definitions. - Check for invalid bit_depth or color_type in png_get_IHDR(), and - check for missing PLTE or IHDR in png_push_read_chunk() (Matthias Clasen). - Revised iTXt support to accept NULL for lang and lang_key. - Compute gamma for color components of background even when color_type is gray. - Changed "()" to "{}" in scripts/libpng.pc.in. - Revised makefiles to put png.h and pngconf.h only in $prefix/include/libpngNN - Revised makefiles to make symlink to libpng.so.NN in addition to libpngNN.so - -Version 1.2.2beta6 [March 31, 2002] - -Version 1.0.13beta1 [March 31, 2002] - Prevent png_zalloc() from trying to memset memory that it failed to acquire. - Add typecasts of PNG_MAX_UINT in pngset_cHRM_fixed() (Matt Holgate). - Ensure that the right function (user or default) is used to free the - png_struct after an error in png_create_read_struct_2(). - -Version 1.2.2rc1 [April 7, 2002] - -Version 1.0.13rc1 [April 7, 2002] - Save the ebx register in pnggccrd.c (Sami Farin) - Add "mem_ptr = png_ptr->mem_ptr" in png_destroy_write_struct() (Paul Gardner). - Updated makefiles to put headers in include/libpng and remove old include/*.h. - -Version 1.2.2 [April 15, 2002] - -Version 1.0.13 [April 15, 2002] - Revised description of png_set_filter() in libpng.3/libpng.txt. - Revised makefile.netbsd and added makefile.neNNbsd and makefile.freebsd - -Version 1.0.13patch01 [April 17, 2002] - -Version 1.2.2patch01 [April 17, 2002] - Changed ${PNGMAJ}.${PNGVER} bug to ${PNGVER} in makefile.sgi and - makefile.sggcc - Fixed VER -> PNGVER typo in makefile.macosx and added install-static to - install - Added install: target to makefile.32sunu and makefile.64sunu - -Version 1.0.13patch03 [April 18, 2002] - -Version 1.2.2patch03 [April 18, 2002] - Revised 15 makefiles to link libpng.a to libpngNN.a and the include libpng - subdirectory to libpngNN subdirectory without the full pathname. - Moved generation of libpng.pc from "install" to "all" in 15 makefiles. - -Version 1.2.3rc1 [April 28, 2002] - Added install-man target to 15 makefiles (Dimitri Papadopolous-Orfanos). - Added $(DESTDIR) feature to 24 makefiles (Tim Mooney) - Fixed bug with $prefix, should be $(prefix) in makefile.hpux. - Updated cygwin-specific portion of pngconf.h and revised makefile.cygwin - Added a link from libpngNN.pc to libpng.pc in 15 makefiles. - Added links from include/libpngNN/*.h to include/*.h in 24 makefiles. - Revised makefile.darwin to make relative links without full pathname. - Added setjmp() at the end of png_create_*_struct_2() in case user forgets - to put one in their application. - Restored png_zalloc() and png_zfree() prototypes to version 1.2.1 and - removed them from module definition files. - -Version 1.2.3rc2 [May 1, 2002] - Fixed bug in reporting number of channels in pngget.c and pngset.c, - that was introduced in version 1.2.2beta5. - Exported png_zalloc(), png_zfree(), png_default_read(), png_default_write(), - png_default_flush(), and png_push_fill_buffer() and included them in - module definition files. - Added "libpng.pc" dependency to the "install-shared" target in 15 makefiles. - -Version 1.2.3rc3 [May 1, 2002] - Revised prototype for png_default_flush() - Remove old libpng.pc and libpngNN.pc before installing new ones. - -Version 1.2.3rc4 [May 2, 2002] - Typos in *.def files (png_default_read|write -> png_default_read|write_data) - In makefiles, changed rm libpng.NN.pc to rm libpngNN.pc - Added libpng-config and libpngNN-config and modified makefiles to install - them. - Changed $(MANPATH) to $(DESTDIR)$(MANPATH) in makefiles - Added "Win32 DLL VB" configuration to projects/msvc/libpng.dsp - -Version 1.2.3rc5 [May 11, 2002] - Changed "error" and "message" in prototypes to "error_message" and - "warning_message" to avoid namespace conflict. - Revised 15 makefiles to build libpng-config from libpng-config-*.in - Once more restored png_zalloc and png_zfree to regular nonexported form. - Restored png_default_read|write_data, png_default_flush, png_read_fill_buffer - to nonexported form, but with PNGAPI, and removed them from module def - files. - -Version 1.2.3rc6 [May 14, 2002] - Removed "PNGAPI" from png_zalloc() and png_zfree() in png.c - Changed "Gz" to "Gd" in projects/msvc/libpng.dsp and zlib.dsp. - Removed leftover libpng-config "sed" script from four makefiles. - Revised libpng-config creating script in 16 makefiles. - -Version 1.2.3 [May 22, 2002] - Revised libpng-config target in makefile.cygwin. - Removed description of png_set_mem_fn() from documentation. - Revised makefile.freebsd. - Minor cosmetic changes to 15 makefiles, e.g., $(DI) = $(DESTDIR)/$(INCDIR). - Revised projects/msvc/README.txt - Changed -lpng to -lpngNN in LDFLAGS in several makefiles. - -Version 1.2.4beta1 [May 24, 2002] - Added libpng.pc and libpng-config to "all:" target in 16 makefiles. - Fixed bug in 16 makefiles: $(DESTDIR)/$(LIBPATH) to $(DESTDIR)$(LIBPATH) - Added missing "\" before closing double quote in makefile.gcmmx. - Plugged various memory leaks; added png_malloc_warn() and png_set_text_2() - functions. - -Version 1.2.4beta2 [June 25, 2002] - Plugged memory leak of png_ptr->current_text (Matt Holgate). - Check for buffer overflow before reading CRC in pngpread.c (Warwick Allison) - Added -soname to the loader flags in makefile.dec, makefile.sgi, and - makefile.sggcc. - Added "test-installed" target to makefile.linux, makefile.gcmmx, - makefile.sgi, and makefile.sggcc. - -Version 1.2.4beta3 [June 28, 2002] - Plugged memory leak of row_buf in pngtest.c when there is a png_error(). - Detect buffer overflow in pngpread.c when IDAT is corrupted with extra data. - Added "test-installed" target to makefile.32sunu, makefile.64sunu, - makefile.beos, makefile.darwin, makefile.dec, makefile.macosx, - makefile.solaris, makefile.hpux, makefile.hpgcc, and makefile.so9. - -Version 1.2.4rc1 and 1.0.14rc1 [July 2, 2002] - Added "test-installed" target to makefile.cygwin and makefile.sco. - Revised pnggccrd.c to be able to back out version 1.0.x via PNG_1_0_X macro. - -Version 1.2.4 and 1.0.14 [July 8, 2002] - Changed png_warning() to png_error() when width is too large to process. - -Version 1.2.4patch01 [July 20, 2002] - Revised makefile.cygwin to use DLL number 12 instead of 13. - -Version 1.2.5beta1 [August 6, 2002] - Added code to contrib/gregbook/readpng2.c to ignore unused chunks. - Replaced toucan.png in contrib/gregbook (it has been corrupt since 1.0.11) - Removed some stray *.o files from contrib/gregbook. - Changed png_error() to png_warning() about "Too much data" in pngpread.c - and about "Extra compressed data" in pngrutil.c. - Prevent png_ptr->pass from exceeding 7 in png_push_finish_row(). - Updated makefile.hpgcc - Updated png.c and pnggccrd.c handling of return from png_mmx_support() - -Version 1.2.5beta2 [August 15, 2002] - Only issue png_warning() about "Too much data" in pngpread.c when avail_in - is nonzero. - Updated makefiles to install a separate libpng.so.3 with its own rpath. - -Version 1.2.5rc1 and 1.0.15rc1 [August 24, 2002] - Revised makefiles to not remove previous minor versions of shared libraries. - -Version 1.2.5rc2 and 1.0.15rc2 [September 16, 2002] - Revised 13 makefiles to remove "-lz" and "-L$(ZLIBLIB)", etc., from shared - library loader directive. - Added missing "$OBJSDLL" line to makefile.gcmmx. - Added missing "; fi" to makefile.32sunu. - -Version 1.2.5rc3 and 1.0.15rc3 [September 18, 2002] - Revised libpng-config script. - -Version 1.2.5 and 1.0.15 [October 3, 2002] - Revised makefile.macosx, makefile.darwin, makefile.hpgcc, and makefile.hpux, - and makefile.aix. - Relocated two misplaced PNGAPI lines in pngtest.c - -Version 1.2.6beta1 [October 22, 2002] - Commented out warning about uninitialized mmx_support in pnggccrd.c. - Changed "IBMCPP__" flag to "__IBMCPP__" in pngconf.h. - Relocated two more misplaced PNGAPI lines in pngtest.c - Fixed memory overrun bug in png_do_read_filler() with 16-bit datastreams, - introduced in version 1.0.2. - Revised makefile.macosx, makefile.dec, makefile.aix, and makefile.32sunu. - -Version 1.2.6beta2 [November 1, 2002] - Added libpng-config "--ldopts" output. - Added "AR=ar" and "ARFLAGS=rc" and changed "ar rc" to "$(AR) $(ARFLAGS)" - in makefiles. - -Version 1.2.6beta3 [July 18, 2004] - Reverted makefile changes from version 1.2.6beta2 and some of the changes - from version 1.2.6beta1; these will be postponed until version 1.2.7. - Version 1.2.6 is going to be a simple bugfix release. - Changed the one instance of "ln -sf" to "ln -f -s" in each Sun makefile. - Fixed potential overrun in pngerror.c by using strncpy instead of memcpy. - Added "#!/bin/sh" at the top of configure, for recognition of the - 'x' flag under Cygwin (Cosmin). - Optimized vacuous tests that silence compiler warnings, in png.c (Cosmin). - Added support for PNG_USER_CONFIG, in pngconf.h (Cosmin). - Fixed the special memory handler for Borland C under DOS, in pngmem.c - (Cosmin). - Removed some spurious assignments in pngrutil.c (Cosmin). - Replaced 65536 with 65536L, and 0xffff with 0xffffL, to silence warnings - on 16-bit platforms (Cosmin). - Enclosed shift op expressions in parentheses, to silence warnings (Cosmin). - Used proper type png_fixed_point, to avoid problems on 16-bit platforms, - in png_handle_sRGB() (Cosmin). - Added compression_type to png_struct, and optimized the window size - inside the deflate stream (Cosmin). - Fixed definition of isnonalpha(), in pngerror.c and pngrutil.c (Cosmin). - Fixed handling of unknown chunks that come after IDAT (Cosmin). - Allowed png_error() and png_warning() to work even if png_ptr == NULL - (Cosmin). - Replaced row_info->rowbytes with row_bytes in png_write_find_filter() - (Cosmin). - Fixed definition of PNG_LIBPNG_VER_DLLNUM (Simon-Pierre). - Used PNG_LIBPNG_VER and PNG_LIBPNG_VER_STRING instead of the hardcoded - values in png.c (Simon-Pierre, Cosmin). - Initialized png_libpng_ver[] with PNG_LIBPNG_VER_STRING (Simon-Pierre). - Replaced PNG_LIBPNG_VER_MAJOR with PNG_LIBPNG_VER_DLLNUM in png.rc - (Simon-Pierre). - Moved the definition of PNG_HEADER_VERSION_STRING near the definitions - of the other PNG_LIBPNG_VER_... symbols in png.h (Cosmin). - Relocated #ifndef PNGAPI guards in pngconf.h (Simon-Pierre, Cosmin). - Updated scripts/makefile.vc(a)win32 (Cosmin). - Updated the MSVC project (Simon-Pierre, Cosmin). - Updated the Borland C++ Builder project (Cosmin). - Avoided access to asm_flags in pngvcrd.c, if PNG_1_0_X is defined (Cosmin). - Commented out warning about uninitialized mmx_support in pngvcrd.c (Cosmin). - Removed scripts/makefile.bd32 and scripts/pngdef.pas (Cosmin). - Added extra guard around inclusion of Turbo C memory headers, in pngconf.h - (Cosmin). - Renamed projects/msvc/ to projects/visualc6/, and projects/borland/ to - projects/cbuilder5/ (Cosmin). - Moved projects/visualc6/png32ms.def to scripts/pngw32.def, - and projects/visualc6/png.rc to scripts/pngw32.rc (Cosmin). - Added projects/visualc6/pngtest.dsp; removed contrib/msvctest/ (Cosmin). - Changed line endings to DOS style in cbuilder5 and visualc6 files, even - in the tar.* distributions (Cosmin). - Updated contrib/visupng/VisualPng.dsp (Cosmin). - Updated contrib/visupng/cexcept.h to version 2.0.0 (Cosmin). - Added a separate distribution with "configure" and supporting files (Junichi). - -Version 1.2.6beta4 [July 28, 2004] - Added user ability to change png_size_t via a PNG_SIZE_T macro. - Added png_sizeof() and png_convert_size() functions. - Added PNG_SIZE_MAX (maximum value of a png_size_t variable. - Added check in png_malloc_default() for (size_t)size != (png_uint_32)size - which would indicate an overflow. - Changed sPLT failure action from png_error to png_warning and abandon chunk. - Changed sCAL and iCCP failures from png_error to png_warning and abandon. - Added png_get_uint_31(png_ptr, buf) function. - Added PNG_UINT_32_MAX macro. - Renamed PNG_MAX_UINT to PNG_UINT_31_MAX. - Made png_zalloc() issue a png_warning and return NULL on potential - overflow. - Turn on PNG_NO_ZALLOC_ZERO by default in version 1.2.x - Revised "clobber list" in pnggccrd.c so it will compile under gcc-3.4. - Revised Borland portion of png_malloc() to return NULL or issue - png_error() according to setting of PNG_FLAG_MALLOC_NULL_MEM_OK. - Added PNG_NO_SEQUENTIAL_READ_SUPPORTED macro to conditionally remove - sequential read support. - Added some "#if PNG_WRITE_SUPPORTED" blocks. - Added #ifdef to remove some redundancy in png_malloc_default(). - Use png_malloc instead of png_zalloc to allocate the palette. - -Version 1.0.16rc1 and 1.2.6rc1 [August 4, 2004] - Fixed buffer overflow vulnerability (CVE-2004-0597) in png_handle_tRNS(). - Fixed NULL dereference vulnerability (CVE-2004-0598) in png_handle_iCCP(). - Fixed integer overflow vulnerability (CVE-2004-0599) in png_read_png(). - Fixed some harmless bugs in png_handle_sBIT, etc, that would cause - duplicate chunk types to go undetected. - Fixed some timestamps in the -config version - Rearranged order of processing of color types in png_handle_tRNS(). - Added ROWBYTES macro to calculate rowbytes without integer overflow. - Updated makefile.darwin and removed makefile.macosx from scripts directory. - Imposed default one million column, one-million row limits on the image - dimensions, and added png_set_user_limits() function to override them. - Revised use of PNG_SET_USER_LIMITS_SUPPORTED macro. - Fixed wrong cast of returns from png_get_user_width|height_max(). - Changed some "keep the compiler happy" from empty statements to returns, - Revised libpng.txt to remove 1.2.x stuff from the 1.0.x distribution - -Version 1.0.16rc2 and 1.2.6rc2 [August 7, 2004] - Revised makefile.darwin and makefile.solaris. Removed makefile.macosx. - Revised pngtest's png_debug_malloc() to use png_malloc() instead of - png_malloc_default() which is not supposed to be exported. - Fixed off-by-one error in one of the conversions to PNG_ROWBYTES() in - pngpread.c. Bug was introduced in 1.2.6rc1. - Fixed bug in RGB to RGBX transformation introduced in 1.2.6rc1. - Fixed old bug in RGB to Gray transformation. - Fixed problem with 64-bit compilers by casting arguments to abs() - to png_int_32. - Changed "ln -sf" to "ln -f -s" in three makefiles (solaris, sco, so9). - Changed "HANDLE_CHUNK_*" to "PNG_HANDLE_CHUNK_*" (Cosmin) - Added "-@/bin/rm -f $(DL)/$(LIBNAME).so.$(PNGMAJ)" to 15 *NIX makefiles. - Added code to update the row_info->colortype in png_do_read_filler() (MSB). - -Version 1.0.16rc3 and 1.2.6rc3 [August 9, 2004] - Eliminated use of "abs()" in testing cHRM and gAMA values, to avoid - trouble with some 64-bit compilers. Created PNG_OUT_OF_RANGE() macro. - Revised documentation of png_set_keep_unknown_chunks(). - Check handle_as_unknown status in pngpread.c, as in pngread.c previously. - Moved "PNG_HANDLE_CHUNK_*" macros out of PNG_INTERNAL section of png.h - Added "rim" definitions for CONST4 and CONST6 in pnggccrd.c - -Version 1.0.16rc4 and 1.2.6rc4 [August 10, 2004] - Fixed mistake in pngtest.c introduced in 1.2.6rc2 (declaration of - "pinfo" was out of place). - -Version 1.0.16rc5 and 1.2.6rc5 [August 10, 2004] - Moved "PNG_HANDLE_CHUNK_*" macros out of PNG_ASSEMBLER_CODE_SUPPORTED - section of png.h where they were inadvertently placed in version rc3. - -Version 1.2.6 and 1.0.16 [August 15, 2004] - Revised pngtest so memory allocation testing is only done when PNG_DEBUG==1. - -Version 1.2.7beta1 [August 26, 2004] - Removed unused pngasmrd.h file. - Removed references to uu.net for archived files. Added references to - PNG Spec (second edition) and the PNG ISO/IEC Standard. - Added "test-dd" target in 15 makefiles, to run pngtest in DESTDIR. - Fixed bug with "optimized window size" in the IDAT datastream, that - causes libpng to write PNG files with incorrect zlib header bytes. - -Version 1.2.7beta2 [August 28, 2004] - Fixed bug with sCAL chunk and big-endian machines (David Munro). - Undid new code added in 1.2.6rc2 to update the color_type in - png_set_filler(). - Added png_set_add_alpha() that updates color type. - -Version 1.0.17rc1 and 1.2.7rc1 [September 4, 2004] - Revised png_set_strip_filler() to not remove alpha if color_type has alpha. - -Version 1.2.7 and 1.0.17 [September 12, 2004] - Added makefile.hp64 - Changed projects/msvc/png32ms.def to scripts/png32ms.def in makefile.cygwin - -Version 1.2.8beta1 [November 1, 2004] - Fixed bug in png_text_compress() that would fail to complete a large block. - Fixed bug, introduced in libpng-1.2.7, that overruns a buffer during - strip alpha operation in png_do_strip_filler(). - Added PNG_1_2_X definition in pngconf.h - Use #ifdef to comment out png_info_init in png.c and png_read_init in - pngread.c (as of 1.3.0) - -Version 1.2.8beta2 [November 2, 2004] - Reduce color_type to a nonalpha type after strip alpha operation in - png_do_strip_filler(). - -Version 1.2.8beta3 [November 3, 2004] - Revised definitions of PNG_MAX_UINT_32, PNG_MAX_SIZE, and PNG_MAXSUM - -Version 1.2.8beta4 [November 12, 2004] - Fixed (again) definition of PNG_LIBPNG_VER_DLLNUM in png.h (Cosmin). - Added PNG_LIBPNG_BUILD_PRIVATE in png.h (Cosmin). - Set png_ptr->zstream.data_type to Z_BINARY, to avoid unnecessary detection - of data type in deflate (Cosmin). - Deprecated but continue to support SPECIALBUILD and PRIVATEBUILD in favor of - PNG_LIBPNG_BUILD_SPECIAL_STRING and PNG_LIBPNG_BUILD_PRIVATE_STRING. - -Version 1.2.8beta5 [November 20, 2004] - Use png_ptr->flags instead of png_ptr->transformations to pass - PNG_STRIP_ALPHA info to png_do_strip_filler(), to preserve ABI - compatibility. - Revised handling of SPECIALBUILD, PRIVATEBUILD, - PNG_LIBPNG_BUILD_SPECIAL_STRING and PNG_LIBPNG_BUILD_PRIVATE_STRING. - -Version 1.2.8rc1 [November 24, 2004] - Moved handling of BUILD macros from pngconf.h to png.h - Added definition of PNG_LIBPNG_BASE_TYPE in png.h, inadvertently - omitted from beta5. - Revised scripts/pngw32.rc - Despammed mailing addresses by masking "@" with "at". - Inadvertently installed a supposedly faster test version of pngrutil.c - -Version 1.2.8rc2 [November 26, 2004] - Added two missing "\" in png.h - Change tests in pngread.c and pngpread.c to - if (png_ptr->transformations || (png_ptr->flags&PNG_FLAG_STRIP_ALPHA)) - png_do_read_transformations(png_ptr); - -Version 1.2.8rc3 [November 28, 2004] - Reverted pngrutil.c to version libpng-1.2.8beta5. - Added scripts/makefile.elf with supporting code in pngconf.h for symbol - versioning (John Bowler). - -Version 1.2.8rc4 [November 29, 2004] - Added projects/visualc7 (Simon-pierre). - -Version 1.2.8rc5 [November 29, 2004] - Fixed new typo in scripts/pngw32.rc - -Version 1.2.8 [December 3, 2004] - Removed projects/visualc7, added projects/visualc71. - -Version 1.2.9beta1 [February 21, 2006] - Initialized some structure members in pngwutil.c to avoid gcc-4.0.0 complaints - Revised man page and libpng.txt to make it clear that one should not call - png_read_end or png_write_end after png_read_png or png_write_png. - Updated references to png-mng-implement mailing list. - Fixed an incorrect typecast in pngrutil.c - Added PNG_NO_READ_SUPPORTED conditional for making a write-only library. - Added PNG_NO_WRITE_INTERLACING_SUPPORTED conditional. - Optimized alpha-inversion loops in pngwtran.c - Moved test for nonzero gamma outside of png_build_gamma_table() in pngrtran.c - Make sure num_trans is <= 256 before copying data in png_set_tRNS(). - Make sure num_palette is <= 256 before copying data in png_set_PLTE(). - Interchanged order of write_swap_alpha and write_invert_alpha transforms. - Added parentheses in the definition of PNG_LIBPNG_BUILD_TYPE (Cosmin). - Optimized zlib window flag (CINFO) in contrib/pngsuite/*.png (Cosmin). - Updated scripts/makefile.bc32 for Borland C++ 5.6 (Cosmin). - Exported png_get_uint_32, png_save_uint_32, png_get_uint_16, png_save_uint_16, - png_get_int_32, png_save_int_32, png_get_uint_31 (Cosmin). - Added type cast (png_byte) in png_write_sCAL() (Cosmin). - Fixed scripts/makefile.cygwin (Christian Biesinger, Cosmin). - Default iTXt support was inadvertently enabled. - -Version 1.2.9beta2 [February 21, 2006] - Check for png_rgb_to_gray and png_gray_to_rgb read transformations before - checking for png_read_dither in pngrtran.c - Revised checking of chromaticity limits to accommodate extended RGB - colorspace (John Denker). - Changed line endings in some of the project files to CRLF, even in the - "Unix" tar distributions (Cosmin). - Made png_get_int_32 and png_save_int_32 always available (Cosmin). - Updated scripts/pngos2.def, scripts/pngw32.def and projects/wince/png32ce.def - with the newly exported functions. - Eliminated distributions without the "configure" script. - Updated INSTALL instructions. - -Version 1.2.9beta3 [February 24, 2006] - Fixed CRCRLF line endings in contrib/visupng/VisualPng.dsp - Made libpng.pc respect EXEC_PREFIX (D. P. Kreil, J. Bowler) - Removed reference to pngasmrd.h from Makefile.am - Renamed CHANGES to ChangeLog. - Renamed LICENSE to COPYING. - Renamed ANNOUNCE to NEWS. - Created AUTHORS file. - -Version 1.2.9beta4 [March 3, 2006] - Changed definition of PKGCONFIG from $prefix/lib to $libdir in configure.ac - Reverted to filenames LICENSE and ANNOUNCE; removed AUTHORS and COPYING. - Removed newline from the end of some error and warning messages. - Removed test for sqrt() from configure.ac and configure. - Made swap tables in pngtrans.c PNG_CONST (Carlo Bramix). - Disabled default iTXt support that was inadvertently enabled in - libpng-1.2.9beta1. - Added "OS2" to list of systems that don't need underscores, in pnggccrd.c - Removed libpng version and date from *.c files. - -Version 1.2.9beta5 [March 4, 2006] - Removed trailing blanks from source files. - Put version and date of latest change in each source file, and changed - copyright year accordingly. - More cleanup of configure.ac, Makefile.am, and associated scripts. - Restored scripts/makefile.elf which was inadvertently deleted. - -Version 1.2.9beta6 [March 6, 2006] - Fixed typo (RELEASE) in configuration files. - -Version 1.2.9beta7 [March 7, 2006] - Removed libpng.vers and libpng.sym from libpng12_la_SOURCES in Makefile.am - Fixed inconsistent #ifdef's around png_sig_bytes() and png_set_sCAL_s() - in png.h. - Updated makefile.elf as suggested by debian. - Made cosmetic changes to some makefiles, adding LN_SF and other macros. - Made some makefiles accept "exec_prefix". - -Version 1.2.9beta8 [March 9, 2006] - Fixed some "#if defined (..." which should be "#if defined(..." - Bug introduced in libpng-1.2.8. - Fixed inconsistency in definition of png_default_read_data() - Restored blank that was lost from makefile.sggcc "clean" target in beta7. - Revised calculation of "current" and "major" for irix in ltmain.sh - Changed "mkdir" to "MKDIR_P" in some makefiles. - Separated PNG_EXPAND and PNG_EXPAND_tRNS. - Added png_set_expand_gray_1_2_4_to_8() and deprecated - png_set_gray_1_2_4_to_8() which also expands tRNS to alpha. - -Version 1.2.9beta9 [March 10, 2006] - Include "config.h" in pngconf.h when available. - Added some checks for NULL png_ptr or NULL info_ptr (timeless) - -Version 1.2.9beta10 [March 20, 2006] - Removed extra CR from contrib/visualpng/VisualPng.dsw (Cosmin) - Made pnggccrd.c PIC-compliant (Christian Aichinger). - Added makefile.mingw (Wolfgang Glas). - Revised pngconf.h MMX checking. - -Version 1.2.9beta11 [March 22, 2006] - Fixed out-of-order declaration in pngwrite.c that was introduced in beta9 - Simplified some makefiles by using LIBSO, LIBSOMAJ, and LIBSOVER macros. - -Version 1.2.9rc1 [March 31, 2006] - Defined PNG_USER_PRIVATEBUILD when including "pngusr.h" (Cosmin). - Removed nonsensical assertion check from pngtest.c (Cosmin). - -Version 1.2.9 [April 14, 2006] - Revised makefile.beos and added "none" selector in ltmain.sh - -Version 1.2.10beta1 [April 15, 2006] - Renamed "config.h" to "png_conf.h" and revised Makefile.am to add - -DPNG_BUILDING_LIBPNG to compile directive, and modified pngconf.h - to include png_conf.h only when PNG_BUILDING_LIBPNG is defined. - -Version 1.2.10beta2 [April 15, 2006] - Manually updated Makefile.in and configure. Changed png_conf.h.in - back to config.h. - -Version 1.2.10beta3 [April 15, 2006] - Change png_conf.h back to config.h in pngconf.h. - -Version 1.2.10beta4 [April 16, 2006] - Change PNG_BUILDING_LIBPNG to PNG_CONFIGURE_LIBPNG in config/Makefile*. - -Version 1.2.10beta5 [April 16, 2006] - Added a configure check for compiling assembler code in pnggccrd.c - -Version 1.2.10beta6 [April 17, 2006] - Revised the configure check for pnggccrd.c - Moved -DPNG_CONFIGURE_LIBPNG into @LIBPNG_DEFINES@ - Added @LIBPNG_DEFINES@ to arguments when building libpng.sym - -Version 1.2.10beta7 [April 18, 2006] - Change "exec_prefix=$prefix" to "exec_prefix=$(prefix)" in makefiles. - -Version 1.2.10rc1 [April 19, 2006] - Ensure pngconf.h doesn't define both PNG_USE_PNGGCCRD and PNG_USE_PNGVCRD - Fixed "LN_FS" typo in makefile.sco and makefile.solaris. - -Version 1.2.10rc2 [April 20, 2006] - Added a backslash between -DPNG_CONFIGURE_LIBPNG and -DPNG_NO_ASSEMBLER_CODE - in configure.ac and configure - Made the configure warning about versioned symbols less arrogant. - -Version 1.2.10rc3 [April 21, 2006] - Added a note in libpng.txt that png_set_sig_bytes(8) can be used when - writing an embedded PNG without the 8-byte signature. - Revised makefiles and configure to avoid making links to libpng.so.* - -Version 1.2.10 [April 23, 2006] - Reverted configure to "rc2" state. - -Version 1.2.11beta1 [May 31, 2006] - scripts/libpng.pc.in contained "configure" style version info and would - not work with makefiles. - The shared-library makefiles were linking to libpng.so.0 instead of - libpng.so.3 compatibility as the library. - -Version 1.2.11beta2 [June 2, 2006] - Increased sprintf buffer from 50 to 52 chars in pngrutil.c to avoid - buffer overflow. - Fixed bug in example.c (png_set_palette_rgb -> png_set_palette_to_rgb) - -Version 1.2.11beta3 [June 5, 2006] - Prepended "#! /bin/sh" to ltmail.sh and contrib/pngminus/*.sh (Cosmin). - Removed the accidental leftover Makefile.in~ (Cosmin). - Avoided potential buffer overflow and optimized buffer in - png_write_sCAL(), png_write_sCAL_s() (Cosmin). - Removed the include directories and libraries from CFLAGS and LDFLAGS - in scripts/makefile.gcc (Nelson A. de Oliveira, Cosmin). - -Version 1.2.11beta4 [June 6, 2006] - Allow zero-length IDAT chunks after the entire zlib datastream, but not - after another intervening chunk type. - -Version 1.0.19rc1, 1.2.11rc1 [June 13, 2006] - Deleted extraneous square brackets from [config.h] in configure.ac - -Version 1.0.19rc2, 1.2.11rc2 [June 14, 2006] - Added prototypes for PNG_INCH_CONVERSIONS functions to png.h - Revised INSTALL and autogen.sh - Fixed typo in several makefiles (-W1 should be -Wl) - Added typedef for png_int_32 and png_uint_32 on 64-bit systems. - -Version 1.0.19rc3, 1.2.11rc3 [June 15, 2006] - Removed the new typedefs for 64-bit systems (delay until version 1.4.0) - Added one zero element to png_gamma_shift[] array in pngrtran.c to avoid - reading out of bounds. - -Version 1.0.19rc4, 1.2.11rc4 [June 15, 2006] - Really removed the new typedefs for 64-bit systems. - -Version 1.0.19rc5, 1.2.11rc5 [June 22, 2006] - Removed png_sig_bytes entry from scripts/pngw32.def - -Version 1.0.19, 1.2.11 [June 26, 2006] - None. - -Version 1.0.20, 1.2.12 [June 27, 2006] - Really increased sprintf buffer from 50 to 52 chars in pngrutil.c to avoid - buffer overflow. - -Version 1.2.13beta1 [October 2, 2006] - Removed AC_FUNC_MALLOC from configure.ac - Work around Intel-Mac compiler bug by setting PNG_NO_MMX_CODE in pngconf.h - Change "logical" to "bitwise" throughout documentation. - Detect and fix attempt to write wrong iCCP profile length (CVE-2006-7244) - -Version 1.0.21, 1.2.13 [November 14, 2006] - Fix potential buffer overflow in sPLT chunk handler. - Fix Makefile.am to not try to link to noexistent files. - Check all exported functions for NULL png_ptr. - -Version 1.2.14beta1 [November 17, 2006] - Relocated three misplaced tests for NULL png_ptr. - Built Makefile.in with automake-1.9.6 instead of 1.9.2. - Build configure with autoconf-2.60 instead of 2.59 - -Version 1.2.14beta2 [November 17, 2006] - Added some typecasts in png_zalloc(). - -Version 1.2.14rc1 [November 20, 2006] - Changed "strtod" to "png_strtod" in pngrutil.c - -Version 1.0.22, 1.2.14 [November 27, 2006] - Added missing "$(srcdir)" in Makefile.am and Makefile.in - -Version 1.2.15beta1 [December 3, 2006] - Generated configure with autoconf-2.61 instead of 2.60 - Revised configure.ac to update libpng.pc and libpng-config. - -Version 1.2.15beta2 [December 3, 2006] - Always export MMX asm functions, just stubs if not building pnggccrd.c - -Version 1.2.15beta3 [December 4, 2006] - Add "png_bytep" typecast to profile while calculating length in pngwutil.c - -Version 1.2.15beta4 [December 7, 2006] - Added scripts/CMakeLists.txt - Changed PNG_NO_ASSEMBLER_CODE to PNG_NO_MMX_CODE in scripts, like 1.4.0beta - -Version 1.2.15beta5 [December 7, 2006] - Changed some instances of PNG_ASSEMBLER_* to PNG_MMX_* in pnggccrd.c - Revised scripts/CMakeLists.txt - -Version 1.2.15beta6 [December 13, 2006] - Revised scripts/CMakeLists.txt and configure.ac - -Version 1.2.15rc1 [December 18, 2006] - Revised scripts/CMakeLists.txt - -Version 1.2.15rc2 [December 21, 2006] - Added conditional #undef jmpbuf in pngtest.c to undo #define in AIX headers. - Added scripts/makefile.nommx - -Version 1.2.15rc3 [December 25, 2006] - Fixed shared library numbering error that was introduced in 1.2.15beta6. - -Version 1.2.15rc4 [December 27, 2006] - Fixed handling of rgb_to_gray when png_ptr->color.gray isn't set. - -Version 1.2.15rc5 [December 31, 2006] - Revised handling of rgb_to_gray. - -Version 1.2.15 [January 5, 2007] - Added some (unsigned long) typecasts in pngtest.c to avoid printing errors. - -Version 1.2.16beta1 [January 6, 2007] - Fix bugs in makefile.nommx - -Version 1.2.16beta2 [January 16, 2007] - Revised scripts/CMakeLists.txt - -Version 1.2.16 [January 31, 2007] - No changes. - -Version 1.2.17beta1 [March 6, 2007] - Revised scripts/CMakeLists.txt to install both shared and static libraries. - Deleted a redundant line from pngset.c. - -Version 1.2.17beta2 [April 26, 2007] - Relocated misplaced test for png_ptr == NULL in pngpread.c - Change "==" to "&" for testing PNG_RGB_TO_GRAY_ERR & PNG_RGB_TO_GRAY_WARN - flags. - Changed remaining instances of PNG_ASSEMBLER_* to PNG_MMX_* - Added pngerror() when write_IHDR fails in deflateInit2(). - Added "const" to some array declarations. - Mention examples of libpng usage in the libpng*.txt and libpng.3 documents. - -Version 1.2.17rc1 [May 4, 2007] - No changes. - -Version 1.2.17rc2 [May 8, 2007] - Moved several PNG_HAVE_* macros out of PNG_INTERNAL because applications - calling set_unknown_chunk_location() need them. - Changed transformation flag from PNG_EXPAND_tRNS to PNG_EXPAND in - png_set_expand_gray_1_2_4_to_8(). - Added png_ptr->unknown_chunk to hold working unknown chunk data, so it - can be free'ed in case of error. Revised unknown chunk handling in - pngrutil.c and pngpread.c to use this structure. - -Version 1.2.17rc3 [May 8, 2007] - Revised symbol-handling in configure script. - -Version 1.2.17rc4 [May 10, 2007] - Revised unknown chunk handling to avoid storing unknown critical chunks. - -Version 1.0.25 [May 15, 2007] -Version 1.2.17 [May 15, 2007] - Added "png_ptr->num_trans=0" before error return in png_handle_tRNS, - to eliminate a vulnerability (CVE-2007-2445, CERT VU#684664) - -Version 1.0.26 [May 15, 2007] -Version 1.2.18 [May 15, 2007] - Reverted the libpng-1.2.17rc3 change to symbol-handling in configure script - -Version 1.2.19beta1 [May 18, 2007] - Changed "const static" to "static PNG_CONST" everywhere, mostly undoing - change of libpng-1.2.17beta2. Changed other "const" to "PNG_CONST" - Changed some handling of unused parameters, to avoid compiler warnings. - "if (unused == NULL) return;" becomes "unused = unused". - -Version 1.2.19beta2 [May 18, 2007] - Only use the valid bits of tRNS value in png_do_expand() (Brian Cartier) - -Version 1.2.19beta3 [May 19, 2007] - Add some "png_byte" typecasts in png_check_keyword() and write new_key - instead of key in zTXt chunk (Kevin Ryde). - -Version 1.2.19beta4 [May 21, 2007] - Add png_snprintf() function and use it in place of sprint() for improved - defense against buffer overflows. - -Version 1.2.19beta5 [May 21, 2007] - Fixed png_handle_tRNS() to only use the valid bits of tRNS value. - Changed handling of more unused parameters, to avoid compiler warnings. - Removed some PNG_CONST in pngwutil.c to avoid compiler warnings. - -Version 1.2.19beta6 [May 22, 2007] - Added some #ifdef PNG_MMX_CODE_SUPPORTED where needed in pngvcrd.c - Added a special "_MSC_VER" case that defines png_snprintf to _snprintf - -Version 1.2.19beta7 [May 22, 2007] - Squelched png_squelch_warnings() in pnggccrd.c and added - an #ifdef PNG_MMX_CODE_SUPPORTED block around the declarations that caused - the warnings that png_squelch_warnings was squelching. - -Version 1.2.19beta8 [May 22, 2007] - Removed __MMX__ from test in pngconf.h. - -Version 1.2.19beta9 [May 23, 2007] - Made png_squelch_warnings() available via PNG_SQUELCH_WARNINGS macro. - Revised png_squelch_warnings() so it might work. - Updated makefile.sgcc and makefile.solaris; added makefile.solaris-x86. - -Version 1.2.19beta10 [May 24, 2007] - Resquelched png_squelch_warnings(), use "__attribute__((used))" instead. - -Version 1.4.0beta1 [April 20, 2006] - Enabled iTXt support (changes png_struct, thus requires so-number change). - Cleaned up PNG_ASSEMBLER_CODE_SUPPORTED vs PNG_MMX_CODE_SUPPORTED - Eliminated PNG_1_0_X and PNG_1_2_X macros. - Removed deprecated functions png_read_init, png_write_init, png_info_init, - png_permit_empty_plte, png_set_gray_1_2_4_to_8, png_check_sig, and - removed the deprecated macro PNG_MAX_UINT. - Moved "PNG_INTERNAL" parts of png.h and pngconf.h into pngintrn.h - Removed many WIN32_WCE #ifdefs (Cosmin). - Reduced dependency on C-runtime library when on Windows (Simon-Pierre) - Replaced sprintf() with png_sprintf() (Simon-Pierre) - -Version 1.4.0beta2 [April 20, 2006] - Revised makefiles and configure to avoid making links to libpng.so.* - Moved some leftover MMX-related defines from pngconf.h to pngintrn.h - Updated scripts/pngos2.def, pngw32.def, and projects/wince/png32ce.def - -Version 1.4.0beta3 [May 10, 2006] - Updated scripts/pngw32.def to comment out MMX functions. - Added PNG_NO_GET_INT_32 and PNG_NO_SAVE_INT_32 macros. - Scripts/libpng.pc.in contained "configure" style version info and would - not work with makefiles. - Revised pngconf.h and added pngconf.h.in, so makefiles and configure can - pass defines to libpng and applications. - -Version 1.4.0beta4 [May 11, 2006] - Revised configure.ac, Makefile.am, and many of the makefiles to write - their defines in pngconf.h. - -Version 1.4.0beta5 [May 15, 2006] - Added a missing semicolon in Makefile.am and Makefile.in - Deleted extraneous square brackets from configure.ac - -Version 1.4.0beta6 [June 2, 2006] - Increased sprintf buffer from 50 to 52 chars in pngrutil.c to avoid - buffer overflow. - Changed sonum from 0 to 1. - Removed unused prototype for png_check_sig() from png.h - -Version 1.4.0beta7 [June 16, 2006] - Exported png_write_sig (Cosmin). - Optimized buffer in png_handle_cHRM() (Cosmin). - Set pHYs = 2835 x 2835 pixels per meter, and added - sCAL = 0.352778e-3 x 0.352778e-3 meters, in pngtest.png (Cosmin). - Added png_set_benign_errors(), png_benign_error(), png_chunk_benign_error(). - Added typedef for png_int_32 and png_uint_32 on 64-bit systems. - Added "(unsigned long)" typecast on png_uint_32 variables in printf lists. - -Version 1.4.0beta8 [June 22, 2006] - Added demonstration of user chunk support in pngtest.c, to support the - public sTER chunk and a private vpAg chunk. - -Version 1.4.0beta9 [July 3, 2006] - Removed ordinals from scripts/pngw32.def and removed png_info_int and - png_set_gray_1_2_4_to_8 entries. - Inline call of png_get_uint_32() in png_get_uint_31(). - Use png_get_uint_31() to get vpAg width and height in pngtest.c - Removed WINCE and Netware projects. - Removed standalone Y2KINFO file. - -Version 1.4.0beta10 [July 12, 2006] - Eliminated automatic copy of pngconf.h to pngconf.h.in from configure and - some makefiles, because it was not working reliably. Instead, distribute - pngconf.h.in along with pngconf.h and cause configure and some of the - makefiles to update pngconf.h from pngconf.h.in. - Added pngconf.h to DEPENDENCIES in Makefile.am - -Version 1.4.0beta11 [August 19, 2006] - Removed AC_FUNC_MALLOC from configure.ac. - Added a warning when writing iCCP profile with mismatched profile length. - Patched pnggccrd.c to assemble on x86_64 platforms. - Moved chunk header reading into a separate function png_read_chunk_header() - in pngrutil.c. The chunk header (len+sig) is now serialized in a single - operation (Cosmin). - Implemented support for I/O states. Added png_ptr member io_state, and - functions png_get_io_chunk_name() and png_get_io_state() in pngget.c - (Cosmin). - Added png_get_io_chunk_name and png_get_io_state to scripts/*.def (Cosmin). - Renamed scripts/pngw32.* to scripts/pngwin.* (Cosmin). - Removed the include directories and libraries from CFLAGS and LDFLAGS - in scripts/makefile.gcc (Cosmin). - Used png_save_uint_32() to set vpAg width and height in pngtest.c (Cosmin). - Cast to proper type when getting/setting vpAg units in pngtest.c (Cosmin). - Added pngintrn.h to the Visual C++ projects (Cosmin). - Removed scripts/list (Cosmin). - Updated copyright year in scripts/pngwin.def (Cosmin). - Removed PNG_TYPECAST_NULL and used standard NULL consistently (Cosmin). - Disallowed the user to redefine png_size_t, and enforced a consistent use - of png_size_t across libpng (Cosmin). - Changed the type of png_ptr->rowbytes, PNG_ROWBYTES() and friends - to png_size_t (Cosmin). - Removed png_convert_size() and replaced png_sizeof with sizeof (Cosmin). - Removed some unnecessary type casts (Cosmin). - Changed prototype of png_get_compression_buffer_size() and - png_set_compression_buffer_size() to work with png_size_t instead of - png_uint_32 (Cosmin). - Removed png_memcpy_check() and png_memset_check() (Cosmin). - Fixed a typo (png_byte --> png_bytep) in libpng.3 and libpng.txt (Cosmin). - Clarified that png_zalloc() does not clear the allocated memory, - and png_zalloc() and png_zfree() cannot be PNGAPI (Cosmin). - Renamed png_mem_size_t to png_alloc_size_t, fixed its definition in - pngconf.h, and used it in all memory allocation functions (Cosmin). - Renamed pngintrn.h to pngpriv.h, added a comment at the top of the file - mentioning that the symbols declared in that file are private, and - updated the scripts and the Visual C++ projects accordingly (Cosmin). - Removed circular references between pngconf.h and pngconf.h.in in - scripts/makefile.vc*win32 (Cosmin). - Removing trailing '.' from the warning and error messages (Cosmin). - Added pngdefs.h that is built by makefile or configure, instead of - pngconf.h.in (Glenn). - Detect and fix attempt to write wrong iCCP profile length. - -Version 1.4.0beta12 [October 19, 2006] - Changed "logical" to "bitwise" in the documentation. - Work around Intel-Mac compiler bug by setting PNG_NO_MMX_CODE in pngconf.h - Add a typecast to stifle compiler warning in pngrutil.c - -Version 1.4.0beta13 [November 10, 2006] - Fix potential buffer overflow in sPLT chunk handler. - Fix Makefile.am to not try to link to noexistent files. - -Version 1.4.0beta14 [November 15, 2006] - Check all exported functions for NULL png_ptr. - -Version 1.4.0beta15 [November 17, 2006] - Relocated two misplaced tests for NULL png_ptr. - Built Makefile.in with automake-1.9.6 instead of 1.9.2. - Build configure with autoconf-2.60 instead of 2.59 - Add "install: all" in Makefile.am so "configure; make install" will work. - -Version 1.4.0beta16 [November 17, 2006] - Added a typecast in png_zalloc(). - -Version 1.4.0beta17 [December 4, 2006] - Changed "new_key[79] = '\0';" to "(*new_key)[79] = '\0';" in pngwutil.c - Add "png_bytep" typecast to profile while calculating length in pngwutil.c - -Version 1.4.0beta18 [December 7, 2006] - Added scripts/CMakeLists.txt - -Version 1.4.0beta19 [May 16, 2007] - Revised scripts/CMakeLists.txt - Rebuilt configure and Makefile.in with newer tools. - Added conditional #undef jmpbuf in pngtest.c to undo #define in AIX headers. - Added scripts/makefile.nommx - -Version 1.4.0beta20 [July 9, 2008] - Moved several PNG_HAVE_* macros from pngpriv.h to png.h because applications - calling set_unknown_chunk_location() need them. - Moved several macro definitions from pngpriv.h to pngconf.h - Merge with changes to the 1.2.X branch, as of 1.2.30beta04. - Deleted all use of the MMX assembler code and Intel-licensed optimizations. - Revised makefile.mingw - -Version 1.4.0beta21 [July 21, 2008] - Moved local array "chunkdata" from pngrutil.c to the png_struct, so - it will be freed by png_read_destroy() in case of a read error (Kurt - Christensen). - -Version 1.4.0beta22 [July 21, 2008] - Change "purpose" and "buffer" to png_ptr->chunkdata to avoid memory leaking. - -Version 1.4.0beta23 [July 22, 2008] - Change "chunkdata = NULL" to "png_ptr->chunkdata = NULL" several places in - png_decompress_chunk(). - -Version 1.4.0beta24 [July 25, 2008] - Change all remaining "chunkdata" to "png_ptr->chunkdata" in - png_decompress_chunk(), and remove "chunkdata" from parameter list. - Put a call to png_check_chunk_name() in png_read_chunk_header(). - Revised png_check_chunk_name() to reject a name with a lowercase 3rd byte. - Removed two calls to png_check_chunk_name() occurring later in the process. - Define PNG_NO_ERROR_NUMBERS by default in pngconf.h - -Version 1.4.0beta25 [July 30, 2008] - Added a call to png_check_chunk_name() in pngpread.c - Reverted png_check_chunk_name() to accept a name with a lowercase 3rd byte. - Added png_push_have_buffer() function to pngpread.c - Eliminated PNG_BIG_ENDIAN_SUPPORTED and associated png_get_* macros. - Made inline expansion of png_get_*() optional with PNG_USE_READ_MACROS. - Eliminated all PNG_USELESS_TESTS and PNG_CORRECT_PALETTE_SUPPORTED code. - Synced contrib directory and configure files with libpng-1.2.30beta06. - Eliminated no-longer-used pngdefs.h (but it's still built in the makefiles) - Relocated a misplaced "#endif /* PNG_NO_WRITE_FILTER */" in pngwutil.c - -Version 1.4.0beta26 [August 4, 2008] - Removed png_push_have_buffer() function in pngpread.c. It increased the - compiled library size slightly. - Changed "-Wall" to "-W -Wall" in the CFLAGS in all makefiles (Cosmin Truta) - Declared png_ptr "volatile" in pngread.c and pngwrite.c to avoid warnings. - Updated contrib/visupng/cexcept.h to version 2.0.1 - Added PNG_LITERAL_CHARACTER macros for #, [, and ]. - -Version 1.4.0beta27 [August 5, 2008] - Revised usage of PNG_LITERAL_SHARP in pngerror.c. - Moved newline character from individual png_debug messages into the - png_debug macros. - Allow user to #define their own png_debug, png_debug1, and png_debug2. - -Version 1.4.0beta28 [August 5, 2008] - Revised usage of PNG_LITERAL_SHARP in pngerror.c. - Added PNG_STRING_NEWLINE macro - -Version 1.4.0beta29 [August 9, 2008] - Revised usage of PNG_STRING_NEWLINE to work on non-ISO compilers. - Added PNG_STRING_COPYRIGHT macro. - Added non-ISO versions of png_debug macros. - -Version 1.4.0beta30 [August 14, 2008] - Added premultiplied alpha feature (Volker Wiendl). - -Version 1.4.0beta31 [August 18, 2008] - Moved png_set_premultiply_alpha from pngtrans.c to pngrtran.c - Removed extra crc check at the end of png_handle_cHRM(). Bug introduced - in libpng-1.4.0beta20. - -Version 1.4.0beta32 [August 19, 2008] - Added PNG_WRITE_FLUSH_SUPPORTED block around new png_flush() call. - Revised PNG_NO_STDIO version of png_write_flush() - -Version 1.4.0beta33 [August 20, 2008] - Added png_get|set_chunk_cache_max() to limit the total number of sPLT, - text, and unknown chunks that can be stored. - -Version 1.4.0beta34 [September 6, 2008] - Shortened tIME_string to 29 bytes in pngtest.c - Fixed off-by-one error introduced in png_push_read_zTXt() function in - libpng-1.2.30beta04/pngpread.c (Harald van Dijk) - -Version 1.4.0beta35 [October 6, 2008] - Changed "trans_values" to "trans_color". - Changed so-number from 0 to 14. Some OS do not like 0. - Revised makefile.darwin to fix shared library numbering. - Change png_set_gray_1_2_4_to_8() to png_set_expand_gray_1_2_4_to_8() - in example.c (debian bug report) - -Version 1.4.0beta36 [October 25, 2008] - Sync with tEXt vulnerability fix in libpng-1.2.33rc02. - -Version 1.4.0beta37 [November 13, 2008] - Added png_check_cHRM in png.c and moved checking from pngget.c, pngrutil.c, - and pngwrite.c - -Version 1.4.0beta38 [November 22, 2008] - Added check for zero-area RGB cHRM triangle in png_check_cHRM() and - png_check_cHRM_fixed(). - -Version 1.4.0beta39 [November 23, 2008] - Revised png_warning() to write its message on standard output by default - when warning_fn is NULL. - -Version 1.4.0beta40 [November 24, 2008] - Eliminated png_check_cHRM(). Instead, always use png_check_cHRM_fixed(). - In png_check_cHRM_fixed(), ensure white_y is > 0, and removed redundant - check for all-zero coordinates that is detected by the triangle check. - -Version 1.4.0beta41 [November 26, 2008] - Fixed string vs pointer-to-string error in png_check_keyword(). - Rearranged test expressions in png_check_cHRM_fixed() to avoid internal - overflows. - Added PNG_NO_CHECK_cHRM conditional. - -Version 1.4.0beta42, 43 [December 1, 2008] - Merge png_debug with version 1.2.34beta04. - -Version 1.4.0beta44 [December 6, 2008] - Removed redundant check for key==NULL before calling png_check_keyword() - to ensure that new_key gets initialized and removed extra warning - (Merge with version 1.2.34beta05 -- Arvan Pritchard). - -Version 1.4.0beta45 [December 9, 2008] - In png_write_png(), respect the placement of the filler bytes in an earlier - call to png_set_filler() (Jim Barry). - -Version 1.4.0beta46 [December 10, 2008] - Undid previous change and added PNG_TRANSFORM_STRIP_FILLER_BEFORE and - PNG_TRANSFORM_STRIP_FILLER_AFTER conditionals and deprecated - PNG_TRANSFORM_STRIP_FILLER (Jim Barry). - -Version 1.4.0beta47 [December 15, 2008] - Support for dithering was disabled by default, because it has never - been well tested and doesn't work very well. The code has not - been removed, however, and can be enabled by building libpng with - PNG_READ_DITHER_SUPPORTED defined. - -Version 1.4.0beta48 [February 14, 2009] - Added new exported function png_calloc(). - Combined several instances of png_malloc(); png_memset() into png_calloc(). - Removed prototype for png_freeptr() that was added in libpng-1.4.0beta24 - but was never defined. - -Version 1.4.0beta49 [February 28, 2009] - Added png_fileno() macro to pngconf.h, used in pngwio.c - Corrected order of #ifdef's in png_debug definition in png.h - Fixed bug introduced in libpng-1.4.0beta48 with the memset arguments - for pcal_params. - Fixed order of #ifdef directives in the png_debug defines in png.h - (bug introduced in libpng-1.2.34/1.4.0beta29). - Revised comments in png_set_read_fn() and png_set_write_fn(). - -Version 1.4.0beta50 [March 18, 2009] - Use png_calloc() instead of png_malloc() to allocate big_row_buf when - reading an interlaced file, to avoid a possible UMR. - Undid revision of PNG_NO_STDIO version of png_write_flush(). Users - having trouble with fflush() can build with PNG_NO_WRITE_FLUSH defined - or supply their own flush_fn() replacement. - Revised libpng*.txt and png.h documentation about use of png_write_flush() - and png_set_write_fn(). - Removed fflush() from pngtest.c. - Added "#define PNG_NO_WRITE_FLUSH" to contrib/pngminim/encoder/pngusr.h - -Version 1.4.0beta51 [March 21, 2009] - Removed new png_fileno() macro from pngconf.h . - -Version 1.4.0beta52 [March 27, 2009] - Relocated png_do_chop() ahead of building gamma tables in pngrtran.c - This avoids building 16-bit gamma tables unnecessarily. - Removed fflush() from pngtest.c. - Added "#define PNG_NO_WRITE_FLUSH" to contrib/pngminim/encoder/pngusr.h - Added a section on differences between 1.0.x and 1.2.x to libpng.3/libpng.txt - -Version 1.4.0beta53 [April 1, 2009] - Removed some remaining MMX macros from pngpriv.h - Fixed potential memory leak of "new_name" in png_write_iCCP() (Ralph Giles) - -Version 1.4.0beta54 [April 13, 2009] - Added "ifndef PNG_SKIP_SETJMP_CHECK" block in pngconf.h to allow - application code writers to bypass the check for multiple inclusion - of setjmp.h when they know that it is safe to ignore the situation. - Eliminated internal use of setjmp() in pngread.c and pngwrite.c - Reordered ancillary chunks in pngtest.png to be the same as what - pngtest now produces, and made some cosmetic changes to pngtest output. - Eliminated deprecated png_read_init_3() and png_write_init_3() functions. - -Version 1.4.0beta55 [April 15, 2009] - Simplified error handling in pngread.c and pngwrite.c by putting - the new png_read_cleanup() and png_write_cleanup() functions inline. - -Version 1.4.0beta56 [April 25, 2009] - Renamed "user_chunk_data" to "my_user_chunk_data" in pngtest.c to suppress - "shadowed declaration" warning from gcc-4.3.3. - Renamed "gamma" to "png_gamma" in pngset.c to avoid "shadowed declaration" - warning about a global "gamma" variable in math.h on some platforms. - -Version 1.4.0beta57 [May 2, 2009] - Removed prototype for png_freeptr() that was added in libpng-1.4.0beta24 - but was never defined (again). - Rebuilt configure scripts with autoconf-2.63 instead of 2.62 - Removed pngprefs.h and MMX from makefiles - -Version 1.4.0beta58 [May 14, 2009] - Changed pngw32.def to pngwin.def in makefile.mingw (typo was introduced - in beta57). - Clarified usage of sig_bit versus sig_bit_p in example.c (Vincent Torri) - -Version 1.4.0beta59 [May 15, 2009] - Reformated sources in libpng style (3-space intentation, comment format) - Fixed typo in libpng docs (PNG_FILTER_AVE should be PNG_FILTER_AVG) - Added sections about the git repository and our coding style to the - documentation - Relocated misplaced #endif in pngwrite.c, sCAL chunk handler. - -Version 1.4.0beta60 [May 19, 2009] - Conditionally compile png_read_finish_row() which is not used by - progressive readers. - Added contrib/pngminim/preader to demonstrate building minimal progressive - decoder, based on contrib/gregbook with embedded libpng and zlib. - -Version 1.4.0beta61 [May 20, 2009] - In contrib/pngminim/*, renamed "makefile.std" to "makefile", since there - is only one makefile in those directories, and revised the README files - accordingly. - More reformatting of comments, mostly to capitalize sentences. - -Version 1.4.0beta62 [June 2, 2009] - Added "#define PNG_NO_WRITE_SWAP" to contrib/pngminim/encoder/pngusr.h - and "define PNG_NO_READ_SWAP" to decoder/pngusr.h and preader/pngusr.h - Reformatted several remaining "else statement" into two lines. - Added a section to the libpng documentation about using png_get_io_ptr() - in configure scripts to detect the presence of libpng. - -Version 1.4.0beta63 [June 15, 2009] - Revised libpng*.txt and libpng.3 to mention calling png_set_IHDR() - multiple times and to specify the sample order in the tRNS chunk, - because the ISO PNG specification has a typo in the tRNS table. - Changed several PNG_UNKNOWN_CHUNK_SUPPORTED to - PNG_HANDLE_AS_UNKNOWN_SUPPORTED, to make the png_set_keep mechanism - available for ignoring known chunks even when not saving unknown chunks. - Adopted preference for consistent use of "#ifdef" and "#ifndef" versus - "#if defined()" and "if !defined()" where possible. - -Version 1.4.0beta64 [June 24, 2009] - Eliminated PNG_LEGACY_SUPPORTED code. - Moved the various unknown chunk macro definitions outside of the - PNG_READ|WRITE_ANCILLARY_CHUNK_SUPPORTED blocks. - -Version 1.4.0beta65 [June 26, 2009] - Added a reference to the libpng license in each file. - -Version 1.4.0beta66 [June 27, 2009] - Refer to the libpng license instead of the libpng license in each file. - -Version 1.4.0beta67 [July 6, 2009] - Relocated INVERT_ALPHA within png_read_png() and png_write_png(). - Added high-level API transform PNG_TRANSFORM_GRAY_TO_RGB. - Added an "xcode" project to the projects directory (Alam Arias). - -Version 1.4.0beta68 [July 19, 2009] - Avoid some tests in filter selection in pngwutil.c - -Version 1.4.0beta69 [July 25, 2009] - Simplified the new filter-selection test. This runs faster in the - common "PNG_ALL_FILTERS" and PNG_FILTER_NONE cases. - Removed extraneous declaration from the new call to png_read_gray_to_rgb() - (bug introduced in libpng-1.4.0beta67). - Fixed up xcode project (Alam Arias) - Added a prototype for png_64bit_product() in png.c - -Version 1.4.0beta70 [July 27, 2009] - Avoid a possible NULL dereference in debug build, in png_set_text_2(). - (bug introduced in libpng-0.95, discovered by Evan Rouault) - -Version 1.4.0beta71 [July 29, 2009] - Rebuilt configure scripts with autoconf-2.64. - -Version 1.4.0beta72 [August 1, 2009] - Replaced *.tar.lzma with *.tar.xz in distribution. Get the xz codec - from . - -Version 1.4.0beta73 [August 1, 2009] - Reject attempt to write iCCP chunk with negative embedded profile length - (JD Chen) (CVE-2009-5063). - -Version 1.4.0beta74 [August 8, 2009] - Changed png_ptr and info_ptr member "trans" to "trans_alpha". - -Version 1.4.0beta75 [August 21, 2009] - Removed an extra png_debug() recently added to png_write_find_filter(). - Fixed incorrect #ifdef in pngset.c regarding unknown chunk support. - -Version 1.4.0beta76 [August 22, 2009] - Moved an incorrectly located test in png_read_row() in pngread.c - -Version 1.4.0beta77 [August 27, 2009] - Removed lpXYZ.tar.bz2 (with CRLF), KNOWNBUG, libpng-x.y.z-KNOWNBUG.txt, - and the "noconfig" files from the distribution. - Moved CMakeLists.txt from scripts into the main libpng directory. - Various bugfixes and improvements to CMakeLists.txt (Philip Lowman) - -Version 1.4.0beta78 [August 31, 2009] - Converted all PNG_NO_* tests to PNG_*_SUPPORTED everywhere except pngconf.h - Eliminated PNG_NO_FREE_ME and PNG_FREE_ME_SUPPORTED macros. - Use png_malloc plus a loop instead of png_calloc() to initialize - row_pointers in png_read_png(). - -Version 1.4.0beta79 [September 1, 2009] - Eliminated PNG_GLOBAL_ARRAYS and PNG_LOCAL_ARRAYS; always use local arrays. - Eliminated PNG_CALLOC_SUPPORTED macro and always provide png_calloc(). - -Version 1.4.0beta80 [September 17, 2009] - Removed scripts/libpng.icc - Changed typecast of filler from png_byte to png_uint_16 in png_set_filler(). - (Dennis Gustafsson) - Fixed typo introduced in beta78 in pngtest.c ("#if def " should be "#ifdef ") - -Version 1.4.0beta81 [September 23, 2009] - Eliminated unused PNG_FLAG_FREE_* defines from pngpriv.h - Expanded TAB characters in pngrtran.c - Removed PNG_CONST from all "PNG_CONST PNG_CHNK" declarations to avoid - compiler complaints about doubly declaring things "const". - Changed all "#if [!]defined(X)" to "if[n]def X" where possible. - Eliminated unused png_ptr->row_buf_size - -Version 1.4.0beta82 [September 25, 2009] - Moved redundant IHDR checking into new png_check_IHDR() in png.c - and report all errors found in the IHDR data. - Eliminated useless call to png_check_cHRM() from pngset.c - -Version 1.4.0beta83 [September 25, 2009] - Revised png_check_IHDR() to eliminate bogus complaint about filter_type. - -Version 1.4.0beta84 [September 30, 2009] - Fixed some inconsistent indentation in pngconf.h - Revised png_check_IHDR() to add a test for width variable less than 32-bit. - -Version 1.4.0beta85 [October 1, 2009] - Revised png_check_IHDR() again, to check info_ptr members instead of - the contents of the returned parameters. - -Version 1.4.0beta86 [October 9, 2009] - Updated the "xcode" project (Alam Arias). - Eliminated a shadowed declaration of "pp" in png_handle_sPLT(). - -Version 1.4.0rc01 [October 19, 2009] - Trivial cosmetic changes. - -Version 1.4.0beta87 [October 30, 2009] - Moved version 1.4.0 back into beta. - -Version 1.4.0beta88 [October 30, 2009] - Revised libpng*.txt section about differences between 1.2.x and 1.4.0 - because most of the new features have now been ported back to 1.2.41 - -Version 1.4.0beta89 [November 1, 2009] - More bugfixes and improvements to CMakeLists.txt (Philip Lowman) - Removed a harmless extra png_set_invert_alpha() from pngwrite.c - Apply png_user_chunk_cache_max within png_decompress_chunk(). - Merged libpng-1.2.41.txt with libpng-1.4.0.txt where appropriate. - -Version 1.4.0beta90 [November 2, 2009] - Removed all remaining WIN32_WCE #ifdefs except those involving the - time.h "tm" structure - -Version 1.4.0beta91 [November 3, 2009] - Updated scripts/pngw32.def and projects/wince/png32ce.def - Copied projects/wince/png32ce.def to the scripts directory. - Added scripts/makefile.wce - Patched ltmain.sh for wince support. - Added PNG_CONVERT_tIME_SUPPORTED macro. - -Version 1.4.0beta92 [November 4, 2009] - Make inclusion of time.h in pngconf.h depend on PNG_CONVERT_tIME_SUPPORTED - Make #define PNG_CONVERT_tIME_SUPPORTED depend on PNG_WRITE_tIME_SUPPORTED - Revised libpng*.txt to describe differences from 1.2.40 to 1.4.0 (instead - of differences from 1.2.41 to 1.4.0) - -Version 1.4.0beta93 [November 7, 2009] - Added PNG_DEPSTRUCT, PNG_DEPRECATED, PNG_USE_RESULT, PNG_NORETURN, and - PNG_ALLOCATED macros to detect deprecated direct access to the - png_struct or info_struct members and other deprecated usage in - applications (John Bowler). - Updated scripts/makefile* to add "-DPNG_CONFIGURE_LIBPNG" to CFLAGS, - to prevent warnings about direct access to png structs by libpng - functions while building libpng. They need to be tested, especially - those using compilers other than gcc. - Updated projects/visualc6 and visualc71 with "/d PNG_CONFIGURE_LIBPNG". - They should work but still need to be updated to remove - references to pnggccrd.c or pngvcrd.c and ASM building. - Added README.txt to the beos, cbuilder5, netware, and xcode projects warning - that they need to be updated, to remove references to pnggccrd.c and - pngvcrd.c and to depend on pngpriv.h - Removed three direct references to read_info_ptr members in pngtest.c - that were detected by the new PNG_DEPSTRUCT macro. - Moved the png_debug macro definitions and the png_read_destroy(), - png_write_destroy() and png_far_to_near() prototypes from png.h - to pngpriv.h (John Bowler) - Moved the synopsis lines for png_read_destroy(), png_write_destroy() - png_debug(), png_debug1(), and png_debug2() from libpng.3 to libpngpf.3. - -Version 1.4.0beta94 [November 9, 2009] - Removed the obsolete, unused pnggccrd.c and pngvcrd.c files. - Updated CMakeLists.txt to add "-DPNG_CONFIGURE_LIBPNG" to the definitions. - Removed dependency of pngtest.o on pngpriv.h in the makefiles. - Only #define PNG_DEPSTRUCT, etc. in pngconf.h if not already defined. - -Version 1.4.0beta95 [November 10, 2009] - Changed png_check_sig() to !png_sig_cmp() in contrib programs. - Added -DPNG_CONFIGURE_LIBPNG to contrib/pngminm/*/makefile - Changed png_check_sig() to !png_sig_cmp() in contrib programs. - Corrected the png_get_IHDR() call in contrib/gregbook/readpng2.c - Changed pngminim/*/gather.sh to stop trying to remove pnggccrd.c and pngvcrd.c - Added dependency on pngpriv.h in contrib/pngminim/*/makefile - -Version 1.4.0beta96 [November 12, 2009] - Renamed scripts/makefile.wce to scripts/makefile.cegcc - Revised Makefile.am to use libpng.sys while building libpng.so - so that only PNG_EXPORT functions are exported. - Removed the deprecated png_check_sig() function/macro. - Removed recently removed function names from scripts/*.def - Revised pngtest.png to put chunks in the same order written by pngtest - (evidently the same change made in libpng-1.0beta54 was lost). - Added PNG_PRIVATE macro definition in pngconf.h for possible future use. - -Version 1.4.0beta97 [November 13, 2009] - Restored pngtest.png to the libpng-1.4.0beta7 version. - Removed projects/beos and netware.txt; no one seems to be supporting them. - Revised Makefile.in - -Version 1.4.0beta98 [November 13, 2009] - Added the "xcode" project to zip distributions, - Fixed a typo in scripts/pngwin.def introduced in beta97. - -Version 1.4.0beta99 [November 14, 2009] - Moved libpng-config.in and libpng.pc-configure.in out of the scripts - directory, to libpng-config.in and libpng-pc.in, respectively, and - modified Makefile.am and configure.ac accordingly. Now "configure" - needs nothing from the "scripts" directory. - Avoid redefining PNG_CONST in pngconf.h - -Version 1.4.0beta100 [November 14, 2009] - Removed ASM builds from projects/visualc6 and projects/visualc71 - Removed scripts/makefile.nommx and makefile.vcawin32 - Revised CMakeLists.txt to account for new location of libpng-config.in - and libpng-pc.in - Updated INSTALL to reflect removal and relocation of files. - -Version 1.4.0beta101 [November 14, 2009] - Restored the binary files (*.jpg, *.png, some project files) that were - accidentally deleted from the zip and 7z distributions when the xcode - project was added. - -Version 1.4.0beta102 [November 18, 2009] - Added libpng-config.in and libpng-pc.in to the zip and 7z distributions. - Fixed a typo in projects/visualc6/pngtest.dsp, introduced in beta100. - Moved descriptions of makefiles and other scripts out of INSTALL into - scripts/README.txt - Updated the copyright year in scripts/pngwin.rc from 2006 to 2009. - -Version 1.4.0beta103 [November 21, 2009] - Removed obsolete comments about ASM from projects/visualc71/README_zlib.txt - Align row_buf on 16-byte boundary in memory. - Restored the PNG_WRITE_FLUSH_AFTER_IEND_SUPPORTED guard around the call - to png_flush() after png_write_IEND(). See 1.4.0beta32, 1.4.0beta50 - changes above and 1.2.30, 1.2.30rc01 and rc03 in 1.2.41 CHANGES. Someone - needs this feature. - Make the 'png_jmpbuf' macro expand to a call that records the correct - longjmp function as well as returning a pointer to the setjmp - jmp_buf buffer, and marked direct access to jmpbuf 'deprecated'. - (John Bowler) - -Version 1.4.0beta104 [November 22, 2009] - Removed png_longjmp_ptr from scripts/*.def and libpng.3 - Rebuilt configure scripts with autoconf-2.65 - -Version 1.4.0beta105 [November 25, 2009] - Use fast integer PNG_DIVIDE_BY_255() or PNG_DIVIDE_BY_65535() - to accomplish alpha premultiplication when - PNG_READ_COMPOSITE_NODIV_SUPPORTED is defined. - Changed "/255" to "/255.0" in background calculations to make it clear - that the 255 is used as a double. - -Version 1.4.0beta106 [November 27, 2009] - Removed premultiplied alpha feature. - -Version 1.4.0beta107 [December 4, 2009] - Updated README - Added "#define PNG_NO_PEDANTIC_WARNINGS" in the libpng source files. - Removed "-DPNG_CONFIGURE_LIBPNG" from the makefiles and projects. - Revised scripts/makefile.netbsd, makefile.openbsd, and makefile.sco - to put png.h and pngconf.h in $prefix/include, like the other scripts, - instead of in $prefix/include/libpng. Also revised makefile.sco - to put them in $prefix/include/libpng15 instead of in - $prefix/include/libpng/libpng15. - -Version 1.4.0beta108 [December 11, 2009] - Removed leftover "-DPNG_CONFIGURE_LIBPNG" from contrib/pngminim/*/makefile - Relocated png_do_chop() to its original position in pngrtran.c; the - change in version 1.2.41beta08 caused transparency to be handled wrong - in some 16-bit datastreams (Yusaku Sugai). - -Version 1.4.0beta109 [December 13, 2009] - Added "bit_depth" parameter to the private png_build_gamma_table() function. - Pass bit_depth=8 to png_build_gamma_table() when bit_depth is 16 but the - PNG_16_TO_8 transform has been set, to avoid unnecessary build of 16-bit - tables. - -Version 1.4.0rc02 [December 20, 2009] - Declared png_cleanup_needed "volatile" in pngread.c and pngwrite.c - -Version 1.4.0rc03 [December 22, 2009] - Renamed libpng-pc.in back to libpng.pc.in and revised CMakeLists.txt - (revising the change in 1.4.0beta99) - -Version 1.4.0rc04 [December 25, 2009] - Swapped PNG_UNKNOWN_CHUNKS_SUPPORTED and PNG_HANDLE_AS_UNKNOWN_SUPPORTED - in pngset.c to be consistent with other changes in version 1.2.38. - -Version 1.4.0rc05 [December 25, 2009] - Changed "libpng-pc.in" to "libpng.pc.in" in configure.ac, configure, and - Makefile.in to be consistent with changes in libpng-1.4.0rc03 - -Version 1.4.0rc06 [December 29, 2009] - Reverted the gamma_table changes from libpng-1.4.0beta109. - Fixed some indentation errors. - -Version 1.4.0rc07 [January 1, 2010] - Revised libpng*.txt and libpng.3 about 1.2.x->1.4.x differences. - Use png_calloc() instead of png_malloc(); png_memset() in pngrutil.c - Update copyright year to 2010. - -Version 1.4.0rc08 [January 2, 2010] - Avoid deprecated references to png_ptr-io_ptr and png_ptr->error_ptr - in pngtest.c - -Version 1.4.0 [January 3, 2010] - No changes. - -Version 1.4.1beta01 [January 8, 2010] - Updated CMakeLists.txt for consistent indentation and to avoid an - unclosed if-statement warning (Philip Lowman). - Revised Makefile.am and Makefile.in to remove references to Y2KINFO, - KNOWNBUG, and libpng.la (Robert Schwebel). - Revised the makefiles to install the same files and symbolic - links as configure, except for libpng.la and libpng14.la. - Make png_set|get_compression_buffer_size() available even when - PNG_WRITE_SUPPORTED is not enabled. - Revised Makefile.am and Makefile.in to simplify their maintenance. - Revised scripts/makefile.linux to install a link to libpng14.so.14.1 - -Version 1.4.1beta02 [January 9, 2010] - Revised the rest of the makefiles to install a link to libpng14.so.14.1 - -Version 1.4.1beta03 [January 10, 2010] - Removed png_set_premultiply_alpha() from scripts/*.def - -Version 1.4.1rc01 [January 16, 2010] - No changes. - -Version 1.4.1beta04 [January 23, 2010] - Revised png_decompress_chunk() to improve speed and memory usage when - decoding large chunks. - Added png_set|get_chunk_malloc_max() functions. - -Version 1.4.1beta05 [January 26, 2010] - Relocated "int k" declaration in pngtest.c to minimize its scope. - -Version 1.4.1beta06 [January 28, 2010] - Revised png_decompress_chunk() to use a two-pass method suggested by - John Bowler. - -Version 1.4.1beta07 [February 6, 2010] - Folded some long lines in the source files. - Added defineable PNG_USER_CHUNK_CACHE_MAX, PNG_USER_CHUNK_MALLOC_MAX, - and a PNG_USER_LIMITS_SUPPORTED flag. - Eliminated use of png_ptr->irowbytes and reused the slot in png_ptr as - png_ptr->png_user_chunk_malloc_max. - Revised png_push_save_buffer() to do fewer but larger png_malloc() calls. - -Version 1.4.1beta08 [February 6, 2010] - Minor cleanup and updating of dates and copyright year. - -Version 1.5.0beta01 [February 7, 2010] - Moved declaration of png_struct into private pngstruct.h and png_info - into pnginfo.h - -Version 1.4.1beta09 and 1.5.0beta02 [February 7, 2010] - Reverted to original png_push_save_buffer() code. - -Version 1.4.1beta10 and 1.5.0beta03 [February 8, 2010] - Return allocated "old_buffer" in png_push_save_buffer() before - calling png_error(), to avoid a potential memory leak. - Updated configure script to use SO number 15. - -Version 1.5.0beta04 [February 9, 2010] - Removed malformed "incomplete struct declaration" of png_info from png.h - -Version 1.5.0beta05 [February 12, 2010] - Removed PNG_DEPSTRUCT markup in pngstruct.h and pnginfo.h, and undid the - linewrapping that it entailed. - Revised comments in pngstruct.h and pnginfo.h and added pointers to - the libpng license. - Changed PNG_INTERNAL to PNG_EXPOSE_INTERNAL_STRUCTURES - Removed the cbuilder5 project, which has not been updated to 1.4.0. - -Version 1.4.1beta12 and 1.5.0beta06 [February 14, 2010] - Fixed type declaration of png_get_chunk_malloc_max() in pngget.c (Daisuke - Nishikawa) - -Version 1.5.0beta07 [omitted] - -Version 1.5.0beta08 [February 19, 2010] - Changed #ifdef PNG_NO_STDIO_SUPPORTED to #ifdef PNG_NO_CONSOLE_IO_SUPPORTED - wherever png_snprintf() is used to construct error and warning messages. - Noted in scripts/makefile.mingw that it expects to be run under MSYS. - Removed obsolete unused MMX-querying support from contrib/gregbook - Added exported png_longjmp() function. - Removed the AIX redefinition of jmpbuf in png.h - Added -D_ALLSOURCE in configure.ac, makefile.aix, and CMakeLists.txt - when building on AIX. - -Version 1.5.0beta09 [February 19, 2010] - Removed -D_ALLSOURCE from configure.ac, makefile.aix, and CMakeLists.txt. - Changed the name of png_ptr->jmpbuf to png_ptr->png_jmpbuf in pngstruct.h - -Version 1.5.0beta10 [February 25, 2010] - Removed unused gzio.c from contrib/pngminim gather and makefile scripts - Removed replacement error handlers from contrib/gregbook. Because of - the new png_longjmp() function they are no longer needed. - -Version 1.5.0beta11 [March 6, 2010] - Removed checking for already-included setjmp.h from pngconf.h - Fixed inconsistent indentations and made numerous cosmetic changes. - Revised the "SEE ALSO" style of libpng.3, libpngpf.3, and png.5 - -Version 1.5.0beta12 [March 9, 2010] - Moved "#include png.h" inside pngpriv.h and removed "#include png.h" from - the source files, along with "#define PNG_EXPOSE_INTERNAL_STRUCTURES" - and "#define PNG_NO_PEDANTIC_WARNINGS" (John Bowler). - Created new pngdebug.h and moved debug definitions there. - -Version 1.5.0beta13 [March 10, 2010] - Protect pngstruct.h, pnginfo.h, and pngdebug.h from being included twice. - Revise the "#ifdef" blocks in png_inflate() so it will compile when neither - PNG_USER_CHUNK_MALLOC_MAX nor PNG_SET_CHUNK_MALLOC_LIMIT_SUPPORTED - is defined. - Removed unused png_measure_compressed_chunk() from pngpriv.h and libpngpf.3 - Moved the 'config.h' support from pngconf.h to pngpriv.h - Removed PNGAPI from the png_longjmp_ptr typedef. - Eliminated dependence of pngtest.c on the private pngdebug.h file. - Make all png_debug macros into *unterminated* statements or - expressions (i.e. a trailing ';' must always be added) and correct - the format statements in various png_debug messages. - -Version 1.5.0beta14 [March 14, 2010] - Removed direct access to png_ptr->io_ptr from the Windows code in pngtest.c - Revised Makefile.am to account for recent additions and replacements. - Corrected CE and OS/2 DEF files (scripts/png*def) for symbols removed and - added ordinal numbers to the Windows DEF file and corrected the duplicated - ordinal numbers on CE symbols that are commented out. - Added back in export symbols that can be present in the Windows build but - are disabled by default. - PNG_EXPORT changed to include an 'ordinal' field for DEF file generation. - PNG_CALLBACK added to make callback definitions uniform. PNGAPI split - into PNGCAPI (base C form), PNGAPI (exports) and PNGCBAPI (callbacks), - and appropriate changes made to all files. Cygwin builds re-hinged to - allow procedure call standard changes and to remove the need for the DEF - file (fixes build on Cygwin). - Enabled 'attribute' warnings that are relevant to library APIs and callbacks. - Changed rules for generation of the various symbol files and added a new - rule for a DEF file (which is also added to the distribution). - Updated the symbol file generation to stop it adding spurious spaces - to EOL (coming from preprocessor macro expansion). Added a facility - to join tokens in the output and rewrite *.dfn to use this. - Eliminated scripts/*.def in favor of libpng.def; updated projects/visualc71 - and removed scripts/makefile.cygwin. - Made PNG_BUILD_DLL safe: it can be set whenever a DLL is being built. - Removed the include of sys/types.h - apparently unnecessary now on the - platforms on which it happened (all but Mac OS and RISC OS). - Moved the Mac OS test into pngpriv.h (the only place it is used.) - -Version 1.5.0beta15 [March 17, 2010] - Added symbols.chk target to Makefile.am to validate the symbols in png.h - against the new DEF file scripts/symbols.def. - Changed the default DEF file back to pngwin.def. - Removed makefile.mingw. - Eliminated PNG_NO_EXTERN and PNG_ALL_EXTERN - -Version 1.5.0beta16 [April 1, 2010] - Make png_text_struct independent of PNG_iTXt_SUPPORTED, so that - fields are initialized in all configurations. The READ/WRITE - macros (PNG_(READ|WRITE)_iTXt_SUPPORTED) still function as - before to disable code to actually read or write iTXt chunks - and iTXt_SUPPORTED can be used to detect presence of either - read or write support (but it is probably better to check for - the one actually required - read or write.) - Combined multiple png_warning() calls for a single error. - Restored the macro definition of png_check_sig(). - -Version 1.5.0beta17 [April 17, 2010] - Added some "(long)" typecasts to printf calls in png_handle_cHRM(). - Documented the fact that png_set_dither() was disabled since libpng-1.4.0. - Reenabled png_set_dither() but renamed it to png_set_quantize() to reflect - more accurately what it actually does. At the same time, renamed - the PNG_DITHER_[RED,GREEN_BLUE]_BITS macros to - PNG_QUANTIZE_[RED,GREEN,BLUE]_BITS. - Added some "(long)" typecasts to printf calls in png_handle_cHRM(). - Freeze build-time only configuration in the build. - In all prior versions of libpng most configuration options - controlled by compiler #defines had to be repeated by the - application code that used libpng. This patch changes this - so that compilation options that can only be changed at build - time are frozen in the build. Options that are compiler - dependent (and those that are system dependent) are evaluated - each time - pngconf.h holds these. Options that can be changed - per-file in the application are in png.h. Frozen options are - in the new installed header file pnglibconf.h (John Bowler) - Removed the xcode project because it has not been updated to work - with libpng-1.5.0. - Removed the ability to include optional pngusr.h - -Version 1.5.0beta18 [April 17, 2010] - Restored the ability to include optional pngusr.h - Moved replacements for png_error() and png_warning() from the - contrib/pngminim project to pngerror.c, for use when warnings or - errors are disabled via PNG_NO_WARN or PNG_NO_ERROR_TEXT, to avoid - storing unneeded error/warning text. - Updated contrib/pngminim project to work with the new pnglibconf.h - Added some PNG_NO_* defines to contrib/pngminim/*/pngusr.h to save space. - -Version 1.5.0beta19 [April 24, 2010] - Added PNG_{READ,WRITE}_INT_FUNCTIONS_SUPPORTED. This allows the functions - to read and write ints to be disabled independently of PNG_USE_READ_MACROS, - which allows libpng to be built with the functions even though the default - is to use the macros - this allows applications to choose at app build - time whether or not to use macros (previously impossible because the - functions weren't in the default build.) - Changed Windows calling convention back to __cdecl for API functions. - For Windows/x86 platforms only: - __stdcall is no longer needed for Visual Basic, so libpng-1.5.0 uses - __cdecl throughout (both API functions and callbacks) on Windows/x86 - platforms. - Replaced visualc6 and visualc71 projects with new vstudio project - Relaxed the overly-restrictive permissions of some files. - -Version 1.5.0beta20 [April 24, 2010] - Relaxed more overly-restrictive permissions of some files. - -Version 1.5.0beta21 [April 27, 2010] - Removed some unwanted binary bytes and changed CRLF to NEWLINE in the new - vstudio project files, and some trivial editing of some files in the - scripts directory. - Set PNG_NO_READ_BGR, PNG_NO_IO_STATE, and PNG_NO_TIME_RFC1123 in - contrib/pngminim/decoder/pngusr.h to make a smaller decoder application. - -Version 1.5.0beta22 [April 28, 2010] - Fixed dependencies of GET_INT_32 - it does not require READ_INT_FUNCTIONS - because it has a macro equivalent. - Improved the options.awk script; added an "everything off" option. - Revised contrib/pngminim to use the "everything off" option in pngusr.dfa. - -Version 1.5.0beta23 [April 29, 2010] - Corrected PNG_REMOVED macro to take five arguments. - The macro was documented with two arguments (name,ordinal), however - the symbol checking .dfn files assumed five arguments. The five - argument form seems more useful so it is changed to that. - Corrected PNG_UNKNOWN_CHUNKS_SUPPORTED to PNG_HANDLE_AS_UNKNOWN_SUPPORTED - in gregbook/readpng2.c - Corrected protection of png_get_user_transform_ptr. The API declaration in - png.h is removed if both READ and WRITE USER_TRANSFORM are turned off - but was left defined in pngtrans.c - Added logunsupported=1 to cause pnglibconf.h to document disabled options. - This makes the installed pnglibconf.h more readable but causes no - other change. The intention is that users of libpng will find it - easier to understand if an API they need is missing. - Include png_reset_zstream() in png.c only when PNG_READ_SUPPORTED is defined. - Removed dummy_inflate.c from contrib/pngminim/encoder - Removed contrib/pngminim/*/gather.sh; gathering is now done in the makefile. - -Version 1.5.0beta24 [May 7, 2010] - Use bitwise "&" instead of arithmetic mod in pngrutil.c calculation of the - offset of the png_ptr->rowbuf pointer into png_ptr->big_row_buf. - Added more blank lines for readability. - -Version 1.5.0beta25 [June 18, 2010] - In pngpread.c: png_push_have_row() add check for new_row > height - Removed the now-redundant check for out-of-bounds new_row from example.c - -Version 1.5.0beta26 [June 18, 2010] - In pngpread.c: png_push_process_row() add check for too many rows. - -Version 1.5.0beta27 [June 18, 2010] - Removed the check added in beta25 as it is now redundant. - -Version 1.5.0beta28 [June 20, 2010] - Rewrote png_process_IDAT_data to consistently treat extra data as warnings - and handle end conditions more cleanly. - Removed the new (beta26) check in png_push_process_row(). - -Version 1.5.0beta29 [June 21, 2010] - Revised scripts/options.awk to work on Sunos (but still doesn't work) - Added comment to options.awk and contrib/pngminim/*/makefile to try nawk. - -Version 1.5.0beta30 [June 22, 2010] - Stop memory leak when reading a malformed sCAL chunk. - -Version 1.5.0beta31 [June 26, 2010] - Revised pngpread.c patch of beta28 to avoid an endless loop. - Removed some trailing blanks. - -Version 1.5.0beta32 [June 26, 2010] - Removed leftover scripts/options.patch and scripts/options.rej - -Version 1.5.0beta33 [July 6, 3010] - Made FIXED and FLOATING options consistent in the APIs they enable and - disable. Corrected scripts/options.awk to handle both command line - options and options specified in the .dfa files. - Changed char *msg to PNG_CONST char *msg in pngrutil.c - Make png_set_sRGB_gAMA_and_cHRM set values using either the fixed or - floating point APIs, but not both. - Reversed patch to remove error handler when the jmp_buf is stored in the - main program structure, not the png_struct. - The error handler is needed because the default handler in libpng will - always use the jmp_buf in the library control structure; this is never - set. The gregbook code is a useful example because, even though it - uses setjmp/longjmp, it shows how error handling can be implemented - using control mechanisms not directly supported by libpng. The - technique will work correctly with mechanisms such as Microsoft - Structure Exceptions or C++ exceptions (compiler willing - note that gcc - does not by default support interworking of C and C++ error handling.) - Reverted changes to call png_longjmp in contrib/gregbook where it is not - appropriate. If mainprog->jmpbuf is used by setjmp, then png_longjmp - cannot be used. - Changed "extern PNG_EXPORT" to "PNG_EXPORT" in png.h (Jan Nijtmans) - Changed "extern" to "PNG_EXTERN" in pngpriv.h (except for the 'extern "C" {') - -Version 1.5.0beta34 [July 12, 2010] - Put #ifndef PNG_EXTERN, #endif around the define PNG_EXTERN in pngpriv.h - -Version 1.5.0beta35 [July 24, 2010] - Removed some newly-added TAB characters. - Added -DNO_PNG_SNPRINTF to CFLAGS in scripts/makefile.dj2 - Moved the definition of png_snprintf() outside of the enclosing - #ifdef blocks in pngconf.h - -Version 1.5.0beta36 [July 29, 2010] - Patches by John Bowler: - Fixed point APIs are now supported throughout (no missing APIs). - Internal fixed point arithmetic support exists for all internal floating - point operations. - sCAL validates the floating point strings it is passed. - Safe, albeit rudimentary, Watcom support is provided by PNG_API_RULE==2 - Two new APIs exist to get the number of passes without turning on the - PNG_INTERLACE transform and to get the number of rows in the current - pass. - A new test program, pngvalid.c, validates the gamma code. - Errors in the 16-bit gamma correction (overflows) have been corrected. - cHRM chunk testing is done consistently (previously the floating point - API bypassed it, because the test really didn't work on FP, now the test - is performed on the actual values to be stored in the PNG file so it - works in the FP case too.) - Most floating point APIs now simply call the fixed point APIs after - converting the values to the fixed point form used in the PNG file. - The standard headers no longer include zlib.h, which is currently only - required for pngstruct.h and can therefore be internal. - Revised png_get_int_32 to undo the PNG two's complement representation of - negative numbers. - -Version 1.5.0beta37 [July 30, 2010] - Added a typecast in png_get_int_32() in png.h and pngrutil.h to avoid - a compiler warning. - Replaced oFFs 0,0 with oFFs -10,20 in pngtest.png - -Version 1.5.0beta38 [July 31, 2010] - Implemented remaining "_fixed" functions. - Corrected a number of recently introduced warnings mostly resulting from - safe but uncast assignments to shorter integers. Also added a zlib - VStudio release library project because the latest zlib Official Windows - build does not include such a thing. - Revised png_get_int_16() to be similar to png_get_int_32(). - Restored projects/visualc71. - -Version 1.5.0beta39 [August 2, 2010] - VisualC/GCC warning fixes, VisualC build fixes - The changes include support for function attributes in VC in addition to - those already present in GCC - necessary because without these some - warnings are unavoidable. Fixes include signed/unsigned fixes in - pngvalid and checks with gcc -Wall -Wextra -Wunused. - VC requires function attributes on function definitions as well as - declarations, PNG_FUNCTION has been added to enable this and the - relevant function definitions changed. - -Version 1.5.0beta40 [August 6, 2010] - Correct use of _WINDOWS_ in pngconf.h - Removed png_mem_ #defines; they are no longer used. - Added the sRGB chunk to pngtest.png - -Version 1.5.0beta41 [August 11, 2010] - Added the cHRM chunk to pngtest.png - Don't try to use version-script with cygwin/mingw. - Revised contrib/gregbook to work under cygwin/mingw. - -Version 1.5.0beta42 [August 18, 2010] - Add .dll.a to the list of extensions to be symlinked by Makefile.am (Yaakov) - Made all API functions that have const arguments and constant string - literal pointers declare them (John Bowler). - -Version 1.5.0beta43 [August 20, 2010] - Removed spurious tabs, shorten long lines (no source change) - Also added scripts/chkfmt to validate the format of all the files that can - reasonably be validated (it is suggested to run "make distclean" before - checking, because some machine generated files have long lines.) - Reformatted the CHANGES file to be more consistent throughout. - Made changes to address various issues identified by GCC, mostly - signed/unsigned and shortening problems on assignment but also a few - difficult to optimize (for GCC) loops. - Fixed non-GCC fixed point builds. In png.c a declaration was misplaced - in an earlier update. Fixed to declare the auto variables at the head. - Use cexcept.h in pngvalid.c. - -Version 1.5.0beta44 [August 24, 2010] - Updated CMakeLists.txt to use CMAKE_INSTALL_LIBDIR variable; useful for - installing libpng in /usr/lib64 (Funda Wang). - Revised CMakeLists.txt to put the man pages in share/man/man* not man/man* - Revised CMakeLists.txt to make symlinks instead of copies when installing. - Changed PNG_LIB_NAME from pngNN to libpngNN in CMakeLists.txt (Philip Lowman) - Implemented memory checks within pngvalid - Reformatted/rearranged pngvalid.c to assist use of progressive reader. - Check interlaced images in pngvalid - Clarified pngusr.h comments in pnglibconf.dfa - Simplified the pngvalid error-handling code now that cexcept.h is in place. - Implemented progressive reader in pngvalid.c for standard tests - Implemented progressive read in pngvalid.c gamma tests - Turn on progressive reader in pngvalid.c by default and tidy code. - -Version 1.5.0beta45 [August 26, 2010] - Added an explicit make step to projects/vstudio for pnglibconf.h - Also corrected zlib.vcxproj into which Visual Studio had introduced - what it calls an "authoring error". The change to make pnglibconf.h - simply copies the file; in the future it may actually generate the - file from scripts/pnglibconf.dfa as the other build systems do. - Changed pngvalid to work when floating point APIs are disabled - Renamed the prebuilt scripts/pnglibconf.h to scripts/pnglibconf.h.prebuilt - Supply default values for PNG_USER_PRIVATEBUILD and PNG_USER_DLLFNAME_POSTFIX - in pngpriv.h in case the user neglected to define them in their pngusr.h - -Version 1.5.0beta46 [August 28, 2010] - Added new private header files to libpng_sources in CMakeLists.txt - Added PNG_READ_16BIT, PNG_WRITE_16BIT, and PNG_16BIT options. - Added reference to scripts/pnglibconf.h.prebuilt in the visualc71 project. - -Version 1.5.0beta47 [September 11, 2010] - Fixed a number of problems with 64-bit compilation reported by Visual - Studio 2010 (John Bowler). - -Version 1.5.0beta48 [October 4, 2010] - Updated CMakeLists.txt (Philip Lowman). - Revised autogen.sh to recognize and use $AUTOCONF, $AUTOMAKE, $AUTOHEADER, - $AUTOPOINT, $ACLOCAL and $LIBTOOLIZE - Fixed problem with symbols creation in Makefile.am which was assuming that - all versions of ccp write to standard output by default (Martin Banky). The - bug was introduced in libpng-1.2.9beta5. - Removed unused mkinstalldirs. - -Version 1.5.0beta49 [October 8, 2010] - Undid Makefile.am revision of 1.5.0beta48. - -Version 1.5.0beta50 [October 14, 2010] - Revised Makefile.in to account for mkinstalldirs being removed. - Added some "(unsigned long)" typecasts in printf statements in pngvalid.c. - Suppressed a compiler warning in png_handle_sPLT(). - Check for out-of-range text compression mode in png_set_text(). - -Version 1.5.0beta51 [October 15, 2010] - Changed embedded dates to "(PENDING RELEASE) in beta releases (and future - rc releases) to minimize the difference between releases. - -Version 1.5.0beta52 [October 16, 2010] - Restored some of the embedded dates (in png.h, png.c, documentation, etc.) - -Version 1.5.0beta53 [October 18, 2010] - Updated INSTALL to mention using "make maintainer-clean" and to remove - obsolete statement about a custom ltmain.sh - Disabled "color-tests" by default in Makefile.am so it will work with - automake versions earlier than 1.11.1 - Use document name "libpng-manual.txt" instead of "libpng-.txt" - to simplify version differences. - Removed obsolete remarks about setjmp handling from INSTALL. - Revised and renamed the typedef in png.h and png.c that was designed - to catch library and header mismatch. - -Version 1.5.0beta54 [November 10, 2010] - Require 48 bytes, not 64 bytes, for big_row_buf in overflow checks. - Used a consistent structure for the pngget.c functions. - -Version 1.5.0beta55 [November 21, 2010] - Revised png_get_uint_32, png_get_int_32, png_get_uint_16 (Cosmin) - Moved reading of file signature into png_read_sig (Cosmin) - Fixed atomicity of chunk header serialization (Cosmin) - Added test for io_state in pngtest.c (Cosmin) - Added "#!/bin/sh" at the top of contrib/pngminim/*/gather.sh scripts. - Changes to remove gcc warnings (John Bowler) - Certain optional gcc warning flags resulted in warnings in libpng code. - With these changes only -Wconversion and -Wcast-qual cannot be turned on. - Changes are trivial rearrangements of code. -Wconversion is not possible - for pngrutil.c (because of the widespread use of += et al on variables - smaller than (int) or (unsigned int)) and -Wcast-qual is not possible - with pngwio.c and pngwutil.c because the 'write' callback and zlib - compression both fail to declare their input buffers with 'const'. - -Version 1.5.0beta56 [December 7, 2010] - Added the private PNG_UNUSED() macro definition in pngpriv.h. - Added some commentary about PNG_EXPORT in png.h and pngconf.h - Revised PNG_EXPORT() macro and added PNG_EXPORTA() macro, with the - objective of simplifying and improving the cosmetic appearance of png.h. - Fixed some incorrect "=" macro names in pnglibconf.dfa - Included documentation of changes in 1.5.0 from 1.4.x in libpng-manual.txt - -Version 1.5.0beta57 [December 9, 2010] - Documented the pngvalid gamma error summary with additional comments and - print statements. - Improved missing symbol handling in checksym.awk; symbols missing in both - the old and new files can now be optionally ignored, treated as errors - or warnings. - Removed references to pngvcrd.c and pnggccrd.c from the vstudio project. - Updated "libpng14" to "libpng15" in the visualc71 project. - Enabled the strip16 tests in pngvalid.` - Don't display test results (except PASS/FAIL) when running "make test". - Instead put them in pngtest-log.txt - Added "--with-zprefix=" to configure.ac - Updated the prebuilt configuration files to autoconf version 2.68 - -Version 1.5.0beta58 [December 19, 2010] - Fixed interlace image handling and add test cases (John Bowler) - Fixed the clean rule in Makefile.am to remove pngtest-log.txt - Made minor changes to work around warnings in gcc 3.4 - -Version 1.5.0rc01 [December 27, 2010] - No changes. - -Version 1.5.0rc02 [December 27, 2010] - Eliminated references to the scripts/*.def files in project/visualc71. - -Version 1.5.0rc03 [December 28, 2010] - Eliminated scripts/*.def and revised Makefile.am accordingly - -Version 1.5.0rc04 [December 29, 2010] - Fixed bug in background transformation handling in pngrtran.c (it was - looking for the flag in png_ptr->transformations instead of in - png_ptr->flags) (David Raymond). - -Version 1.5.0rc05 [December 31, 2010] - Fixed typo in a comment in CMakeLists.txt (libpng14 => libpng15) (Cosmin) - -Version 1.5.0rc06 [January 4, 2011] - Changed the new configure option "zprefix=string" to "zlib-prefix=string" - -Version 1.5.0rc07 [January 4, 2011] - Updated copyright year. - -Version 1.5.0 [January 6, 2011] - No changes. - -version 1.5.1beta01 [January 8, 2011] - Added description of png_set_crc_action() to the manual. - Added a note in the manual that the type of the iCCP profile was changed - from png_charpp to png_bytepp in png_get_iCCP(). This change happened - in version 1.5.0beta36 but is not noted in the CHANGES. Similarly, - it was changed from png_charpp to png_const_bytepp in png_set_iCCP(). - Ensure that png_rgb_to_gray ignores palette mapped images, if libpng - internally happens to call it with one, and fixed a failure to handle - palette mapped images correctly. This fixes CVE-2690. - -Version 1.5.1beta02 [January 14, 2011] - Fixed a bug in handling of interlaced images (bero at arklinux.org). - Updated CMakeLists.txt (Clifford Yapp) - -Version 1.5.1beta03 [January 14, 2011] - Fixed typecasting of some png_debug() statements (Cosmin) - -Version 1.5.1beta04 [January 16, 2011] - Updated documentation of png_set|get_tRNS() (Thomas Klausner). - Mentioned in the documentation that applications must #include "zlib.h" - if they need access to anything in zlib.h, and that a number of - macros such as png_memset() are no longer accessible by applications. - Corrected pngvalid gamma test "sample" function to access all of the color - samples of each pixel, instead of sampling the red channel three times. - Prefixed variable names index, div, exp, gamma with "png_" to avoid "shadow" - warnings, and (mistakenly) changed png_exp() to exp(). - -Version 1.5.1beta05 [January 16, 2011] - Changed variable names png_index, png_div, png_exp, and png_gamma to - char_index, divisor, exp_b10, and gamma_val, respectively, and - changed exp() back to png_exp(). - -Version 1.5.1beta06 [January 20, 2011] - Prevent png_push_crc_skip() from hanging while reading an unknown chunk - or an over-large compressed zTXt chunk with the progressive reader. - Eliminated more GCC "shadow" warnings. - Revised png_fixed() in png.c to avoid compiler warning about reaching the - end without returning anything. - -Version 1.5.1beta07 [January 22, 2011] - In the manual, describe the png_get_IHDR() arguments in the correct order. - Added const_png_structp and const_png_infop types, and used them in - prototypes for most png_get_*() functions. - -Version 1.5.1beta08 [January 23, 2011] - Added png_get_io_chunk_type() and deprecated png_get_io_chunk_name() - Added synopses for the IO_STATE functions and other missing synopses - to the manual. Removed the synopses from libpngpf.3 because they - were out of date and no longer useful. Better information can be - obtained by reading the prototypes and comments in pngpriv.h - Attempted to fix cpp on Solaris with S. Studio 12 cc, fix build - Added a make macro DFNCPP that is a CPP that will accept the tokens in - a .dfn file and adds configure stuff to test for such a CPP. ./configure - should fail if one is not available. - Corrected const_png_ in png.h to png_const_ to avoid polluting the namespace. - Added png_get_current_row_number and png_get_current_pass_number for the - benefit of the user transform callback. - Added png_process_data_pause and png_process_data_skip for the benefit of - progressive readers that need to stop data processing or want to optimize - skipping of unread data (e.g., if the reader marks a chunk to be skipped.) - -Version 1.5.1beta09 [January 24, 2011] - Enhanced pngvalid, corrected an error in gray_to_rgb, corrected doc error. - pngvalid contains tests of transforms, which tests are currently disabled - because they are incompletely tested. gray_to_rgb was failing to expand - the bit depth for smaller bit depth images; this seems to be a long - standing error and resulted, apparently, in invalid output - (CVE-2011-0408, CERT VU#643140). The documentation did not accurately - describe what libpng really does when converting RGB to gray. - -Version 1.5.1beta10 [January 27, 2010] - Fixed incorrect examples of callback prototypes in the manual, that were - introduced in libpng-1.0.0. - In addition the order of the png_get_uint macros with respect to the - relevant function definitions has been reversed. This helps the - preprocessing of the symbol files be more robust. Furthermore, the - symbol file preprocessing now uses -DPNG_NO_USE_READ_MACROS even when - the library may actually be built with PNG_USE_READ_MACROS; this stops - the read macros interfering with the symbol file format. - Made the manual, synopses, and function prototypes use the function - argument names file_gamma, int_file_gamma, and srgb_intent consistently. - -Version 1.5.1beta11 [January 28, 2011] - Changed PNG_UNUSED from "param=param;" to "{if(param){}}". - Corrected local variable type in new API png_process_data_skip() - The type was self-evidently incorrect but only causes problems on 64-bit - architectures. - Added transform tests to pngvalid and simplified the arguments. - -Version 1.5.1rc01 [January 29, 2011] - No changes. - -Version 1.5.1rc02 [January 31, 2011] - Added a request in the manual that applications do not use "png_" or - "PNG_" to begin any of their own symbols. - Changed PNG_UNUSED to "(void)param;" and updated the commentary in pngpriv.h - -Version 1.5.1 [February 3, 2011] - No changes. - -Version 1.5.2beta01 [February 13, 2011] - More -Wshadow fixes for older gcc compilers. Older gcc versions apparently - check formal parameters names in function declarations (as well as - definitions) to see if they match a name in the global namespace. - Revised PNG_EXPORTA macro to not use an empty parameter, to accommodate the - old VisualC++ preprocessor. - Turned on interlace handling in png_read_png(). - Fixed gcc pedantic warnings. - Handle longjmp in Cygwin. - Fixed png_get_current_row_number() in the interlaced case. - Cleaned up ALPHA flags and transformations. - Implemented expansion to 16 bits. - -Version 1.5.2beta02 [February 19, 2011] - Fixed mistake in the descriptions of user read_transform and write_transform - function prototypes in the manual. The row_info struct is png_row_infop. - Reverted png_get_current_row_number() to previous (1.5.2beta01) behavior. - Corrected png_get_current_row_number documentation - Fixed the read/write row callback documentation. - This documents the current behavior, where the callback is called after - every row with information pertaining to the next row. - -Version 1.5.2beta03 [March 3, 2011] - Fixed scripts/makefile.vcwin32 - Updated contrib/pngsuite/README to add the word "modify". - Define PNG_ALLOCATED to blank when _MSC_VER<1300. - -Version 1.5.2rc01 [March 19, 2011] - Define remaining attributes to blank when MSC_VER<1300. - ifdef out mask arrays in pngread.c when interlacing is not supported. - -Version 1.5.2rc02 [March 22, 2011] - Added a hint to try CPP=/bin/cpp if "cpp -E" fails in scripts/pnglibconf.mak - and in contrib/pngminim/*/makefile, eg., on SunOS 5.10, and removed "strip" - from the makefiles. - Fixed a bug (present since libpng-1.0.7) that makes png_handle_sPLT() fail - to compile when PNG_NO_POINTER_INDEXING is defined (Chubanov Kirill) - -Version 1.5.2rc03 [March 24, 2011] - Don't include standard header files in png.h while building the symbol table, - to avoid cpp failure on SunOS (introduced PNG_BUILDING_SYMBOL_TABLE macro). - -Version 1.5.2 [March 31, 2011] - No changes. - -Version 1.5.3beta01 [April 1, 2011] - Re-initialize the zlib compressor before compressing non-IDAT chunks. - Added API functions (png_set_text_compression_level() and four others) to - set parameters for zlib compression of non-IDAT chunks. - -Version 1.5.3beta02 [April 3, 2011] - Updated scripts/symbols.def with new API functions. - Only compile the new zlib re-initializing code when text or iCCP is - supported, using PNG_WRITE_COMPRESSED_TEXT_SUPPORTED macro. - Improved the optimization of the zlib CMF byte (see libpng-1.2.6beta03). - Optimize the zlib CMF byte in non-IDAT compressed chunks - -Version 1.5.3beta03 [April 16, 2011] - Fixed gcc -ansi -pedantic compile. A strict ANSI system does not have - snprintf, and the "__STRICT_ANSI__" detects that condition more reliably - than __STDC__ (John Bowler). - Removed the PNG_PTR_NORETURN attribute because it too dangerous. It tells - the compiler that a user supplied callback (the error handler) does not - return, yet there is no guarantee in practice that the application code - will correctly implement the error handler because the compiler only - issues a warning if there is a mistake (John Bowler). - Removed the no-longer-used PNG_DEPSTRUCT macro. - Updated the zlib version to 1.2.5 in the VStudio project. - Fixed 64-bit builds where png_uint_32 is smaller than png_size_t in - pngwutil.c (John Bowler). - Fixed bug with stripping the filler or alpha channel when writing, that - was introduced in libpng-1.5.2beta01 (bug report by Andrew Church). - -Version 1.5.3beta04 [April 27, 2011] - Updated pngtest.png with the new zlib CMF optimization. - Cleaned up conditional compilation code and of background/gamma handling - Internal changes only except a new option to avoid compiling the - png_build_grayscale_palette API (which is not used at all internally.) - The main change is to move the transform tests (READ_TRANSFORMS, - WRITE_TRANSFORMS) up one level to the caller of the APIs. This avoids - calls to spurious functions if all transforms are disabled and slightly - simplifies those functions. Pngvalid modified to handle this. - A minor change is to stop the strip_16 and expand_16 interfaces from - disabling each other; this allows the future alpha premultiplication - code to use 16-bit intermediate values while still producing 8-bit output. - png_do_background and png_do_gamma have been simplified to take a single - pointer to the png_struct rather than pointers to every item required - from the png_struct. This makes no practical difference to the internal - code. - A serious bug in the pngvalid internal routine 'standard_display_init' has - been fixed - this failed to initialize the red channel and accidentally - initialized the alpha channel twice. - Changed png_struct jmp_buf member name from png_jmpbuf to tmp_jmpbuf to - avoid a possible clash with the png_jmpbuf macro on some platforms. - -Version 1.5.3beta05 [May 6, 2011] - Added the "_POSIX_SOURCE" feature test macro to ensure libpng sees the - correct API. _POSIX_SOURCE is defined in pngpriv.h, pngtest.c and - pngvalid.c to ensure that POSIX conformant systems disable non-POSIX APIs. - Removed png_snprintf and added formatted warning messages. This change adds - internal APIs to allow png_warning messages to have parameters without - requiring the host OS to implement snprintf. As a side effect the - dependency of the tIME-supporting RFC1132 code on stdio is removed and - PNG_NO_WARNINGS does actually work now. - Pass "" instead of '\0' to png_default_error() in png_err(). This mistake - was introduced in libpng-1.2.20beta01. This fixes CVE-2011-2691. - Added PNG_WRITE_OPTIMIZE_CMF_SUPPORTED macro to make the zlib "CMF" byte - optimization configurable. - IDAT compression failed if preceded by a compressed text chunk (bug - introduced in libpng-1.5.3beta01-02). This was because the attempt to - reset the zlib stream in png_write_IDAT happened after the first IDAT - chunk had been deflated - much too late. In this change internal - functions were added to claim/release the z_stream and, hopefully, make - the code more robust. Also deflateEnd checking is added - previously - libpng would ignore an error at the end of the stream. - -Version 1.5.3beta06 [May 8, 2011] - Removed the -D_ALL_SOURCE from definitions for AIX in CMakeLists.txt - Implemented premultiplied alpha support: png_set_alpha_mode API - -Version 1.5.3beta07 [May 11, 2011] - Added expand_16 support to the high level interface. - Added named value and 'flag' gamma support to png_set_gamma. Made a minor - change from the previous (unreleased) ABI/API to hide the exact value used - for Macs - it's not a good idea to embed this in the ABI! - Moved macro definitions for PNG_HAVE_IHDR, PNG_HAVE_PLTE, and PNG_AFTER_IDAT - from pngpriv.h to png.h because they must be visible to applications - that call png_set_unknown_chunks(). - Check for up->location !PNG_AFTER_IDAT when writing unknown chunks - before IDAT. - -Version 1.5.3beta08 [May 16, 2011] - Improved "pngvalid --speed" to exclude more of pngvalid from the time. - Documented png_set_alpha_mode(), other changes in libpng.3/libpng-manual.txt - The cHRM chunk now sets the defaults for png_set_rgb_to_gray() (when negative - parameters are supplied by the caller), while in the absence of cHRM - sRGB/Rec 709 values are still used. This introduced a divide-by-zero - bug in png_handle_cHRM(). - The bKGD chunk no longer overwrites the background value set by - png_set_background(), allowing the latter to be used before the file - header is read. It never performed any useful function to override - the default anyway. - Added memory overwrite and palette image checks to pngvalid.c - Previously palette image code was poorly checked. Since the transformation - code has a special palette path in most cases this was a severe weakness. - Minor cleanup and some extra checking in pngrutil.c and pngrtran.c. When - expanding an indexed image, always expand to RGBA if transparency is - present. - -Version 1.5.3beta09 [May 17, 2011] - Reversed earlier 1.5.3 change of transformation order; move png_expand_16 - back where it was. The change doesn't work because it requires 16-bit - gamma tables when the code only generates 8-bit ones. This fails - silently; the libpng code just doesn't do any gamma correction. Moving - the tests back leaves the old, inaccurate, 8-bit gamma calculations, but - these are clearly better than none! - -Version 1.5.3beta10 [May 20, 2011] - - png_set_background() and png_expand_16() did not work together correctly. - This problem is present in 1.5.2; if png_set_background is called with - need_expand false and the matching 16 bit color libpng erroneously just - treats it as an 8-bit color because of where png_do_expand_16 is in the - transform list. This simple fix reduces the supplied colour to 8-bits, - so it gets smashed, but this is better than the current behavior. - Added tests for expand16, more fixes for palette image tests to pngvalid. - Corrects the code for palette image tests and disables attempts to - validate palette colors. - -Version 1.5.3rc01 [June 3, 2011] - No changes. - -Version 1.5.3rc02 [June 8, 2011] - Fixed uninitialized memory read in png_format_buffer() (Bug report by - Frank Busse, CVE-2011-2501, related to CVE-2004-0421). - -Version 1.5.3beta11 [June 11, 2011] - Fixed png_handle_sCAL which is broken in 1.5. This fixes CVE 2011-2692. - Added sCAL to pngtest.png - Revised documentation about png_set_user_limits() to say that it also affects - png writing. - Revised handling of png_set_user_limits() so that it can increase the - limit beyond the PNG_USER_WIDTH|HEIGHT_MAX; previously it could only - reduce it. - Make the 16-to-8 scaling accurate. Dividing by 256 with no rounding is - wrong (high by one) 25% of the time. Dividing by 257 with rounding is - wrong in 128 out of 65536 cases. Getting the right answer all the time - without division is easy. - Added "_SUPPORTED" to the PNG_WRITE_CUSTOMIZE_ZTXT_COMPRESSION macro. - Added projects/owatcom, an IDE project for OpenWatcom to replace - scripts/makefile.watcom. This project works with OpenWatcom 1.9. The - IDE autogenerates appropriate makefiles (libpng.mk) for batch processing. - The project is configurable, unlike the Visual Studio project, so long - as the developer has an awk. - Changed png_set_gAMA to limit the gamma value range so that the inverse - of the stored value cannot overflow the fixed point representation, - and changed other things OpenWatcom warns about. - Revised pngvalid.c to test PNG_ALPHA_MODE_SUPPORTED correctly. This allows - pngvalid to build when ALPHA_MODE is not supported, which is required if - it is to build on libpng 1.4. - Removed string/memory macros that are no longer used and are not - necessarily fully supportable, particularly png_strncpy and png_snprintf. - Added log option to pngvalid.c and attempted to improve gamma messages. - -Version 1.5.3 [omitted] - People found the presence of a beta release following an rc release - to be confusing; therefore we bump the version to libpng-1.5.4beta01 - and there will be no libpng-1.5.3 release. - -Version 1.5.4beta01 [June 14, 2011] - Made it possible to undefine PNG_READ_16_TO_8_ACCURATE_SCALE_SUPPORTED - to get the same (inaccurate) output as libpng-1.5.2 and earlier. - Moved definitions of PNG_HAVE_IHDR, PNG_AFTER_IDAT, and PNG_HAVE_PLTE - outside of an unknown-chunk block in png.h because they are also - needed for other uses. - -Version 1.5.4beta02 [June 14, 2011] - Fixed and clarified LEGACY 16-to-8 scaling code. - Added png_set_chop_16() API, to match inaccurate results from previous - libpng versions. - Removed the ACCURATE and LEGACY options (they are no longer useable) - Use the old scaling method for background if png_set_chop_16() was - called. - Made png_set_chop_16() API removeable by disabling PNG_CHOP_16_TO_8_SUPPORTED - -Version 1.5.4beta03 [June 15, 2011] - Fixed a problem in png_do_expand_palette() exposed by optimization in - 1.5.3beta06 - Also removed a spurious and confusing "trans" member ("trans") from png_info. - The palette expand optimization prevented expansion to an intermediate RGBA - form if tRNS was present but alpha was marked to be stripped; this exposed - a check for tRNS in png_do_expand_palette() which is inconsistent with the - code elsewhere in libpng. - Correction to the expand_16 code; removed extra instance of - png_set_scale_16_to_8 from pngpriv.h - -Version 1.5.4beta04 [June 16, 2011] - Added a missing "#ifdef PNG_READ_BACKGROUND_SUPPORTED/#endif" in pngrtran.c - Added PNG_TRANSFORM_CHOP_16 to the high-level read transforms. - Made PNG_READ_16_TO_8_ACCURATE_SCALE configurable again. If this is - not enabled, png_set_strip_16() and png_do_scale_16_to_8() aren't built. - Revised contrib/visupng, gregbook, and pngminim to demonstrate chop_16_to_8 - -Version 1.5.4beta05 [June 16, 2011] - Renamed png_set_strip_16() to png_set_scale_16() and renamed - png_set_chop_16() to png_set_strip(16) in an attempt to minimize the - behavior changes between libpng14 and libpng15. - -Version 1.5.4beta06 [June 18, 2011] - Fixed new bug that was causing both strip_16 and scale_16 to be applied. - -Version 1.5.4beta07 [June 19, 2011] - Fixed pngvalid, simplified macros, added checking for 0 in sCAL. - The ACCURATE scale macro is no longer defined in 1.5 - call the - png_scale_16_to_8 API. Made sure that PNG_READ_16_TO_8 is still defined - if the png_strip_16_to_8 API is present. png_check_fp_number now - maintains some state so that positive, negative and zero values are - identified. sCAL uses these to be strictly spec conformant. - -Version 1.5.4beta08 [June 23, 2011] - Fixed pngvalid if ACCURATE_SCALE is defined. - Updated scripts/pnglibconf.h.prebuilt. - -Version 1.5.4rc01 [June 30, 2011] - Define PNG_ALLOCATED to "restrict" only if MSC_VER >= 1400. - -Version 1.5.4 [July 7, 2011] - No changes. - -Version 1.5.5beta01 [July 13, 2011] - Fixed some typos and made other minor changes in the manual. - Updated contrib/pngminus/makefile.std (Samuli Souminen) - -Version 1.5.5beta02 [July 14, 2011] - Revised Makefile.am and Makefile.in to look in the right directory for - pnglibconf.h.prebuilt - -Version 1.5.5beta03 [July 27, 2011] - Enabled compilation with g++ compiler. This compiler does not recognize - the file extension, so it always compiles with C++ rules. Made minor - changes to pngrutil.c to cast results where C++ expects it but C does not. - Minor editing of libpng.3 and libpng-manual.txt. - -Version 1.5.5beta04 [July 29, 2011] - Revised CMakeLists.txt (Clifford Yapp) - Updated commentary about the png_rgb_to_gray() default coefficients - in the manual and in pngrtran.c - -Version 1.5.5beta05 [August 17, 2011] - Prevent unexpected API exports from non-libpng DLLs on Windows. The "_DLL" - is removed from the test of whether a DLL is being built (this erroneously - caused the libpng APIs to be marked as DLL exports in static builds under - Microsoft Visual Studio). Almost all of the libpng building configuration - is moved from pngconf.h to pngpriv.h, but PNG_DLL_EXPORT remains in - pngconf.h, though, so that it is colocated with the import definition (it - is no longer used anywhere in the installed headers). The VStudio project - definitions have been cleaned up: "_USRDLL" has been removed from the - static library builds (this was incorrect), and PNG_USE_DLL has been added - to pngvalid to test the functionality (pngtest does not supply it, - deliberately). The spurious "_EXPORTS" has been removed from the - libpng build (all these errors were a result of copy/paste between project - configurations.) - Added new types and internal functions for CIE RGB end point handling to - pngpriv.h (functions yet to be implemented). - -Version 1.5.5beta06 [August 26, 2011] - Ensure the CMAKE_LIBRARY_OUTPUT_DIRECTORY is set in CMakeLists.txt - (Clifford Yap) - Fixes to rgb_to_gray and cHRM XYZ APIs (John Bowler): - The rgb_to_gray code had errors when combined with gamma correction. - Some pixels were treated as true grey when they weren't and such pixels - and true grey ones were not gamma corrected (the original value of the - red component was used instead). APIs to get and set cHRM using color - space end points have been added and the rgb_to_gray code that defaults - based on cHRM, and the divide-by-zero bug in png_handle_cHRM (CERT - VU#477046, CVE-2011-3328, introduced in 1.5.4) have been corrected. - A considerable number of tests has been added to pngvalid for the - rgb_to_gray transform. - Arithmetic errors in rgb_to_gray whereby the calculated gray value was - truncated to the bit depth rather than rounded have been fixed except in - the 8-bit non-gamma-corrected case (where consistency seems more important - than correctness.) The code still has considerable inaccuracies in the - 8-bit case because 8-bit linear arithmetic is used. - -Version 1.5.5beta07 [September 7, 2011] - Added "$(ARCH)" option to makefile.darwin - Added SunOS support to configure.ac and Makefile.am - Changed png_chunk_benign_error() to png_warning() in png.c, in - png_XYZ_from_xy_checked(). - -Version 1.5.5beta08 [September 10, 2011] - Fixed 64-bit compilation errors (gcc). The errors fixed relate - to conditions where types that are 32 bits in the GCC 32-bit - world (uLong and png_size_t) become 64 bits in the 64-bit - world. This produces potential truncation errors which the - compiler correctly flags. - Relocated new HAVE_SOLARIS_LD definition in configure.ac - Constant changes for 64-bit compatibility (removal of L suffixes). The - 16-bit cases still use "L" as we don't have a 16-bit test system. - -Version 1.5.5rc01 [September 15, 2011] - Removed "L" suffixes in pngpriv.h - -Version 1.5.5 [September 22, 2011] - No changes. - -Version 1.5.6beta01 [September 22, 2011] - Fixed some 64-bit type conversion warnings in pngrtran.c - Moved row_info from png_struct to a local variable. - The various interlace mask arrays have been made into arrays of - bytes and made PNG_CONST and static (previously some arrays were - marked PNG_CONST and some weren't). - Additional checks have been added to the transform code to validate the - pixel depths after the transforms on both read and write. - Removed some redundant code from pngwrite.c, in png_destroy_write_struct(). - Changed chunk reading/writing code to use png_uint_32 instead of png_byte[4]. - This removes the need to allocate temporary strings for chunk names on - the stack in the read/write code. Unknown chunk handling still uses the - string form because this is exposed in the API. - -Version 1.5.6beta02 [September 26, 2011] - Added a note in the manual the png_read_update_info() must be called only - once with a particular info_ptr. - Fixed a typo in the definition of the new PNG_STRING_FROM_CHUNK(s,c) macro. - -Version 1.5.6beta03 [September 28, 2011] - Revised test-pngtest.sh to report FAIL when pngtest fails. - Added "--strict" option to pngtest, to report FAIL when the failure is - only because the resulting valid files are different. - Revised CMakeLists.txt to work with mingw and removed some material from - CMakeLists.txt that is no longer useful in libpng-1.5. - -Version 1.5.6beta04 [October 5, 2011] - Fixed typo in Makefile.in and Makefile.am ("-M Wl" should be "-M -Wl")." - -Version 1.5.6beta05 [October 12, 2011] - Speed up png_combine_row() for interlaced images. This reduces the generality - of the code, allowing it to be optimized for Adam7 interlace. The masks - passed to png_combine_row() are now generated internally, avoiding - some code duplication and localizing the interlace handling somewhat. - Align png_struct::row_buf - previously it was always unaligned, caused by - a bug in the code that attempted to align it; the code needs to subtract - one from the pointer to take account of the filter byte prepended to - each row. - Optimized png_combine_row() when rows are aligned. This gains a small - percentage for 16-bit and 32-bit pixels in the typical case where the - output row buffers are appropriately aligned. The optimization was not - previously possible because the png_struct buffer was always misaligned. - Fixed bug in png_write_chunk_header() debug print, introduced in 1.5.6beta01. - -Version 1.5.6beta06 [October 17, 2011] - Removed two redundant tests for uninitialized row. - Fixed a relatively harmless memory overwrite in compressed text writing - with a 1 byte zlib buffer. - Add ability to call png_read_update_info multiple times to pngvalid.c. - Fixes for multiple calls to png_read_update_info. These fixes attend to - most of the errors revealed in pngvalid, however doing the gamma work - twice results in inaccuracies that can't be easily fixed. There is now - a warning in the code if this is going to happen. - Turned on multiple png_read_update_info in pngvalid transform tests. - Prevent libpng from overwriting unused bits at the end of the image when - it is not byte aligned, while reading. Prior to libpng-1.5.6 libpng would - overwrite the partial byte at the end of each row if the row width was not - an exact multiple of 8 bits and the image is not interlaced. - -Version 1.5.6beta07 [October 21, 2011] - Made png_ptr->prev_row an aligned pointer into png_ptr->big_prev_row - (Mans Rullgard). - -Version 1.5.6rc01 [October 26, 2011] - Changed misleading "Missing PLTE before cHRM" warning to "Out of place cHRM" - -Version 1.5.6rc02 [October 27, 2011] - Added LSR() macro to defend against buggy compilers that evaluate non-taken - code branches and complain about out-of-range shifts. - -Version 1.5.6rc03 [October 28, 2011] - Renamed the LSR() macro to PNG_LSR() and added PNG_LSL() macro. - Fixed compiler warnings with Intel and MSYS compilers. The logical shift - fix for Microsoft Visual C is required by other compilers, so this - enables that fix for all compilers when using compile-time constants. - Under MSYS 'byte' is a name declared in a system header file, so we - changed the name of a local variable to avoid the warnings that result. - Added #define PNG_ALIGN_TYPE PNG_ALIGN_NONE to contrib/pngminim/*/pngusr.h - -Version 1.5.6 [November 3, 2011] - No changes. - -Version 1.5.7beta01 [November 4, 2011] - Added support for ARM processor, when decoding all PNG up-filtered rows - and any other-filtered rows with 3 or 4 bytes per pixel (Mans Rullgard). - Fixed bug in pngvalid on early allocation failure; fixed type cast in - pngmem.c; pngvalid would attempt to call png_error() if the allocation - of a png_struct or png_info failed. This would probably have led to a - crash. The pngmem.c implementation of png_malloc() included a cast - to png_size_t which would fail on large allocations on 16-bit systems. - Fix for the preprocessor of the Intel C compiler. The preprocessor - splits adjacent @ signs with a space; this changes the concatenation - token from @-@-@ to PNG_JOIN; that should work with all compiler - preprocessors. - Paeth filter speed improvements from work by Siarhei Siamashka. This - changes the 'Paeth' reconstruction function to improve the GCC code - generation on x86. The changes are only part of the suggested ones; - just the changes that definitely improve speed and remain simple. - The changes also slightly increase the clarity of the code. - -Version 1.5.7beta02 [November 11, 2011] - Check compression_type parameter in png_get_iCCP and remove spurious - casts. The compression_type parameter is always assigned to, so must - be non-NULL. The cast of the profile length potentially truncated the - value unnecessarily on a 16-bit int system, so the cast of the (byte) - compression type to (int) is specified by ANSI-C anyway. - Fixed FP division by zero in pngvalid.c; the 'test_pixel' code left - the sBIT fields in the test pixel as 0, which resulted in a floating - point division by zero which was irrelevant but causes systems where - FP exceptions cause a crash. Added code to pngvalid to turn on FP - exceptions if the appropriate glibc support is there to ensure this is - tested in the future. - Updated scripts/pnglibconf.mak and scripts/makefile.std to handle the - new PNG_JOIN macro. - Added versioning to pnglibconf.h comments. - Simplified read/write API initial version; basic read/write tested on - a variety of images, limited documentation (in the header file.) - Installed more accurate linear to sRGB conversion tables. The slightly - modified tables reduce the number of 16-bit values that - convert to an off-by-one 8-bit value. The "makesRGB.c" code that was used - to generate the tables is now in a contrib/sRGBtables sub-directory. - -Version 1.5.7beta03 [November 17, 2011] - Removed PNG_CONST from the sRGB table declarations in pngpriv.h and png.c - Added run-time detection of NEON support. - Added contrib/libtests; includes simplified API test and timing test and - a color conversion utility for rapid checking of failed 'pngstest' results. - Multiple transform bug fixes plus a work-round for double gamma correction. - libpng does not support more than one transform that requires linear data - at once - if this is tried typically the results is double gamma - correction. Since the simplified APIs can need rgb to gray combined with - a compose operation it is necessary to do one of these outside the main - libpng transform code. This check-in also contains fixes to various bugs - in the simplified APIs themselves and to some bugs in compose and rgb to - gray (on palette) itself. - Fixes for C++ compilation using g++ When libpng source is compiled - using g++. The compiler imposes C++ rules on the C source; thus it - is desirable to make the source work with either C or C++ rules - without throwing away useful error information. This change adds - png_voidcast to allow C semantic (void*) cases or the corresponding - C++ static_cast operation, as appropriate. - Added --noexecstack to assembler file compilation. GCC does not set - this on assembler compilation, even though it does on C compilation. - This creates security issues if assembler code is enabled; the - work-around is to set it by default in the flags for $(CCAS) - Work around compilers that don't support declaration of const data. Some - compilers fault 'extern const' data declarations (because the data is - not initialized); this turns on const-ness only for compilers where - this is known to work. - -Version 1.5.7beta04 [November 17, 2011] - Since the gcc driver does not recognize the --noexecstack flag, we must - use the -Wa prefix to have it passed through to the assembler. - Also removed a duplicate setting of this flag. - Added files that were omitted from the libpng-1.5.7beta03 zip distribution. - -Version 1.5.7beta05 [November 25, 2011] - Removed "zTXt" from warning in generic chunk decompression function. - Validate time settings passed to png_set_tIME() and png_convert_to_rfc1123() - (Frank Busse). Note: This prevented CVE-2015-7981 from affecting - libpng-1.5.7 and later. - Added MINGW support to CMakeLists.txt - Reject invalid compression flag or method when reading the iTXt chunk. - Backed out 'simplified' API changes. The API seems too complex and there - is a lack of consensus or enthusiasm for the proposals. The API also - reveals significant bugs inside libpng (double gamma correction and the - known bug of being unable to retrieve a corrected palette). It seems - better to wait until the bugs, at least, are corrected. - Moved pngvalid.c into contrib/libtests - Rebuilt Makefile.in, configure, etc., with autoconf-2.68 - -Version 1.5.7rc01 [December 1, 2011] - Replaced an "#if" with "#ifdef" in pngrtran.c - Revised #if PNG_DO_BC block in png.c (use #ifdef and add #else) - -Version 1.5.7rc02 [December 5, 2011] - Revised project files and contrib/pngvalid/pngvalid.c to account for - the relocation of pngvalid into contrib/libtests. - Revised pngconf.h to use " __declspec(restrict)" only when MSC_VER >= 1400, - as in libpng-1.5.4. - Put CRLF line endings in the owatcom project files. - -Version 1.5.7rc03 [December 7, 2011] - Updated CMakeLists.txt to account for the relocation of pngvalid.c - -Version 1.5.7 [December 15, 2011] - Minor fixes to pngvalid.c for gcc 4.6.2 compatibility to remove warnings - reported by earlier versions. - Fixed minor memset/sizeof errors in pngvalid.c. - -Version 1.6.0beta01 [December 15, 2011] - Removed machine-generated configure files from the GIT repository (they will - continue to appear in the tarball distributions and in the libpng15 and - earlier GIT branches). - Restored the new 'simplified' API, which was started in libpng-1.5.7beta02 - but later deleted from libpng-1.5.7beta05. - Added example programs for the new 'simplified' API. - Added ANSI-C (C90) headers and require them, and take advantage of the - change. Also fixed some of the projects/* and contrib/* files that needed - updates for libpng16 and the move of pngvalid.c. - With this change the required ANSI-C header files are assumed to exist: the - implementation must provide float.h, limits.h, stdarg.h and stddef.h and - libpng relies on limits.h and stddef.h existing and behaving as defined - (the other two required headers aren't used). Non-ANSI systems that don't - have stddef.h or limits.h will have to provide an appropriate fake - containing the relevant types and #defines. - Dropped support for 16-bit platforms. The use of FAR/far has been eliminated - and the definition of png_alloc_size_t is now controlled by a flag so - that 'small size_t' systems can select it if necessary. Libpng 1.6 may - not currently work on such systems -- it seems likely that it will - ask 'malloc' for more than 65535 bytes with any image that has a - sufficiently large row size (rather than simply failing to read such - images). - New tools directory containing tools used to generate libpng code. - Fixed race conditions in parallel make builds. With higher degrees of - parallelism during 'make' the use of the same temporary file names such - as 'dfn*' can result in a race where a temporary file from one arm of the - build is deleted or overwritten in another arm. This changes the - temporary files for suffix rules to always use $* and ensures that the - non-suffix rules use unique file names. - -Version 1.6.0beta02 [December 21, 2011] - Correct configure builds where build and source directories are separate. - The include path of 'config.h' was erroneously made relative in pngvalid.c - in libpng 1.5.7. - -Version 1.6.0beta03 [December 22, 2011] - Start-up code size improvements, error handler flexibility. These changes - alter how the tricky allocation of the initial png_struct and png_info - structures are handled. png_info is now handled in pretty much the same - way as everything else, except that the allocations handle NULL return - silently. png_struct is changed in a similar way on allocation and on - deallocation a 'safety' error handler is put in place (which should never - be required). The error handler itself is changed to permit mismatches - in the application and libpng error buffer size; however, this means a - silent change to the API to return the jmp_buf if the size doesn't match - the size from the libpng compilation; libpng now allocates the memory and - this may fail. Overall these changes result in slight code size - reductions; however, this is a reduction in code that is always executed - so is particularly valuable. Overall on a 64-bit system the libpng DLL - decreases in code size by 1733 bytes. pngerror.o increases in size by - about 465 bytes because of the new functionality. - Added png_convert_to_rfc1123_buffer() and deprecated png_convert_to_rfc1123() - to avoid including a spurious buffer in the png_struct. - -Version 1.6.0beta04 [December 30, 2011] - Regenerated configure scripts with automake-1.11.2 - Eliminated png_info_destroy(). It is now used only in png.c and only calls - one other internal function and memset(). - Enabled png_get_sCAL_fixed() if floating point APIs are enabled. Previously - it was disabled whenever internal fixed point arithmetic was selected, - which meant it didn't exist even on systems where FP was available but not - preferred. - Added pngvalid.c compile time checks for const APIs. - Implemented 'restrict' for png_info and png_struct. Because of the way - libpng works both png_info and png_struct are always accessed via a - single pointer. This means adding C99 'restrict' to the pointer gives - the compiler some opportunity to optimize the code. This change allows - that. - Moved AC_MSG_CHECKING([if libraries can be versioned]) later to the proper - location in configure.ac (Gilles Espinasse). - Changed png_memcpy to C assignment where appropriate. Changed all those - uses of png_memcpy that were doing a simple assignment to assignments - (all those cases where the thing being copied is a non-array C L-value). - Added some error checking to png_set_*() routines. - Removed the reference to the non-exported function png_memcpy() from - example.c. - Fixed the Visual C 64-bit build - it requires jmp_buf to be aligned, but - it had become misaligned. - Revised contrib/pngminus/pnm2png.c to avoid warnings when png_uint_32 - and unsigned long are of different sizes. - -Version 1.6.0beta05 [January 15, 2012] - Updated manual with description of the simplified API (copied from png.h) - Fix bug in pngerror.c: some long warnings were being improperly truncated - (CVE-2011-3464, bug introduced in libpng-1.5.3beta05). - -Version 1.6.0beta06 [January 24, 2012] - Added palette support to the simplified APIs. This commit - changes some of the macro definitions in png.h, app code - may need corresponding changes. - Increased the formatted warning buffer to 192 bytes. - Added color-map support to simplified API. This is an initial version for - review; the documentation has not yet been updated. - Fixed Min/GW uninstall to remove libpng.dll.a - -Version 1.6.0beta07 [January 28, 2012] - Eliminated Intel icc/icl compiler warnings. The Intel (GCC derived) - compiler issues slightly different warnings from those issued by the - current vesions of GCC. This eliminates those warnings by - adding/removing casts and small code rewrites. - Updated configure.ac from autoupdate: added --enable-werror option. - Also some layout regularization and removal of introduced tab characters - (replaced with 3-character indentation). Obsolete macros identified by - autoupdate have been removed; the replacements are all in 2.59 so - the pre-req hasn't been changed. --enable-werror checks for support - for -Werror (or the given argument) in the compiler. This mimics the - gcc configure option by allowing -Werror to be turned on safely; without - the option the tests written in configure itself fail compilation because - they cause compiler warnings. - Rewrote autogen.sh to run autoreconf instead of running tools one-by-one. - Conditionalize the install rules for MINGW and CYGWIN in CMakeLists.txt and - set CMAKE_LIBRARY_OUTPUT_DIRECTORY to "lib" on all platforms (C. Yapp). - Freeze libtool files in the 'scripts' directory. This version of autogen.sh - attempts to dissuade people from running it when it is not, or should not, - be necessary. In fact, autogen.sh does not work when run in a libpng - directory extracted from a tar distribution anymore. You must run it in - a GIT clone instead. - Added two images to contrib/pngsuite (1-bit and 2-bit transparent grayscale), - and renamed three whose names were inconsistent with those in - pngsuite/README.txt. - -Version 1.6.0beta08 [February 1, 2012] - Fixed Image::colormap misalignment in pngstest.c - Check libtool/libtoolize version number (2.4.2) in configure.ac - Divide test-pngstest.sh into separate pngstest runs for basic and - transparent images. - Moved automake options to AM_INIT_AUTOMAKE in configure.ac - Added color-tests, silent-rules (Not yet implemented in Makefile.am) and - version checking to configure.ac - Improved pngstest speed by not doing redundant tests and add const to - the background parameter of png_image_finish_read. The --background - option is now done automagically only when required, so that commandline - option no longer exists. - Cleaned up pngpriv.h to consistently declare all functions and data. - Also eliminated PNG_CONST_DATA, which is apparently not needed but we - can't be sure until it is gone. - Added symbol prefixing that allows all the libpng external symbols - to be prefixed (suggested by Reuben Hawkins). - Updated "ftbb*.png" list in the owatcom and vstudio projects. - Fixed 'prefix' builds on clean systems. The generation of pngprefix.h - should not require itself. - Updated INSTALL to explain that autogen.sh must be run in a GIT clone, - not in a libpng directory extracted from a tar distribution. - -Version 1.6.0beta09 [February 1, 2012] - Reverted the prebuilt configure files to libpng-1.6.0beta05 condition. - -Version 1.6.0beta10 [February 3, 2012] - Added Z_SOLO for zlib-1.2.6+ and correct pngstest tests - Updated list of test images in CMakeLists.txt - Updated the prebuilt configure files to current condition. - Revised INSTALL information about autogen.sh; it works in tar distributions. - -Version 1.6.0beta11 [February 16, 2012] - Fix character count in pngstest command in projects/owatcom/pngstest.tgt - Revised test-pngstest.sh to report PASS/FAIL for each image. - Updated documentation about the simplified API. - Corrected estimate of error in libpng png_set_rgb_to_gray API. The API is - extremely inaccurate for sRGB conversions because it uses an 8-bit - intermediate linear value and it does not use the sRGB transform, so it - suffers from the known instability in gamma transforms for values close - to 0 (see Poynton). The net result is that the calculation has a maximum - error of 14.99/255; 0.5/255^(1/2.2). pngstest now uses 15 for the - permitted 8-bit error. This may still not be enough because of arithmetic - error. - Removed some unused arrays (with #ifdef) from png_read_push_finish_row(). - Fixed a memory overwrite bug in simplified read of RGB PNG with - non-linear gamma Also bugs in the error checking in pngread.c and changed - quite a lot of the checks in pngstest.c to be correct; either correctly - written or not over-optimistic. The pngstest changes are insufficient to - allow all possible RGB transforms to be passed; pngstest cmppixel needs - to be rewritten to make it clearer which errors it allows and then changed - to permit known inaccuracies. - Removed tests for no-longer-used *_EMPTY_PLTE_SUPPORTED from pngstruct.h - Fixed fixed/float API export conditionals. 1) If FIXED_POINT or - FLOATING_POINT options were switched off, png.h ended up with lone ';' - characters. This is not valid ANSI-C outside a function. The ';' - characters have been moved inside the definition of PNG_FP_EXPORT and - PNG_FIXED_EXPORT. 2) If either option was switched off, the declaration - of the corresponding functions were completely omitted, even though some - of them are still used internally. The result is still valid, but - produces warnings from gcc with some warning options (including -Wall). The - fix is to cause png.h to declare the functions with PNG_INTERNAL_FUNCTION - when png.h is included from pngpriv.h. - Check for invalid palette index while reading paletted PNG. When one is - found, issue a warning and increase png_ptr->num_palette accordingly. - Apps are responsible for checking to see if that happened. - -Version 1.6.0beta12 [February 18, 2012] - Do not increase num_palette on invalid_index. - Relocated check for invalid palette index to pngrtran.c, after unpacking - the sub-8-bit pixels. - Fixed CVE-2011-3026 buffer overrun bug. This bug was introduced when - iCCP chunk support was added at libpng-1.0.6. Deal more correctly with the - test on iCCP chunk length. Also removed spurious casts that may hide - problems on 16-bit systems. - -Version 1.6.0beta13 [February 24, 2012] - Eliminated redundant png_push_read_tEXt|zTXt|iTXt|unknown code from - pngpread.c and use the sequential png_handle_tEXt, etc., in pngrutil.c; - now that png_ptr->buffer is inaccessible to applications, the special - handling is no longer useful. - Added PNG_SAFE_LIMITS feature to pnglibconf.dfa, pngpriv.h, and new - pngusr.dfa to reset the user limits to safe ones if PNG_SAFE_LIMITS is - defined. To enable, use "CPPFLAGS=-DPNG_SAFE_LIMITS_SUPPORTED=1" on the - configure command or put #define PNG_SAFE_LIMITS_SUPPORTED in - pnglibconf.h.prebuilt and pnglibconf.h. - -Version 1.6.0beta14 [February 27, 2012] - Added information about the new limits in the manual. - Updated Makefile.in - -Version 1.6.0beta15 [March 2, 2012] - Removed unused "current_text" members of png_struct and the png_free() - of png_ptr->current_text from pngread.c - Rewrote pngstest.c for substantial speed improvement. - Fixed transparent pixel and 16-bit rgb tests in pngstest and removed a - spurious check in pngwrite.c - Added PNG_IMAGE_FLAG_FAST for the benefit of applications that store - intermediate files, or intermediate in-memory data, while processing - image data with the simplified API. The option makes the files larger - but faster to write and read. pngstest now uses this by default; this - can be disabled with the --slow option. - Improved pngstest fine tuning of error numbers, new test file generator. - The generator generates images that test the full range of sample values, - allow the error numbers in pngstest to be tuned and checked. makepng - also allows generation of images with extra chunks, although this is - still work-in-progress. - Added check for invalid palette index while reading. - Fixed some bugs in ICC profile writing. The code should now accept - all potentially valid ICC profiles and reject obviously invalid ones. - It now uses png_error() to do so rather than casually writing a PNG - without the necessary color data. - Removed whitespace from the end of lines in all source files and scripts. - -Version 1.6.0beta16 [March 6, 2012] - Relocated palette-index checking function from pngrutil.c to pngtrans.c - Added palette-index checking while writing. - Changed png_inflate() and calling routines to avoid overflow problems. - This is an intermediate check-in that solves the immediate problems and - introduces one performance improvement (avoiding a copy via png_ptr->zbuf.) - Further changes will be made to make ICC profile handling more secure. - Fixed build warnings (MSVC, GCC, GCC v3). Cygwin GCC with default options - declares 'index' as a global, causing a warning if it is used as a local - variable. GCC 64-bit warns about assigning a (size_t) (unsigned 64-bit) - to an (int) (signed 32-bit). MSVC, however, warns about using the - unary '-' operator on an unsigned value (even though it is well defined - by ANSI-C to be ~x+1). The padding calculation was changed to use a - different method. Removed the tests on png_ptr->pass. - Added contrib/libtests/tarith.c to test internal arithmetic functions from - png.c. This is a libpng maintainer program used to validate changes to the - internal arithmetic functions. - Made read 'inflate' handling like write 'deflate' handling. The read - code now claims and releases png_ptr->zstream, like the write code. - The bug whereby the progressive reader failed to release the zstream - is now fixed, all initialization is delayed, and the code checks for - changed parameters on deflate rather than always calling - deflatedEnd/deflateInit. - Validate the zTXt strings in pngvalid. - Added code to validate the windowBits value passed to deflateInit2(). - If the call to deflateInit2() is wrong a png_warning will be issued - (in fact this is harmless, but the PNG data produced may be sub-optimal). - -Version 1.6.0beta17 [March 10, 2012] - Fixed PNG_LIBPNG_BUILD_BASE_TYPE definition. - Reject all iCCP chunks after the first, even if the first one is invalid. - Deflate/inflate was reworked to move common zlib calls into single - functions [rw]util.c. A new shared keyword check routine was also added - and the 'zbuf' is no longer allocated on progressive read. It is now - possible to call png_inflate() incrementally. A warning is no longer - issued if the language tag or translated keyword in the iTXt chunk - has zero length. - If benign errors are disabled use maximum window on ancillary inflate. - This works round a bug introduced in 1.5.4 where compressed ancillary - chunks could end up with a too-small windowBits value in the deflate - header. - -Version 1.6.0beta18 [March 16, 2012] - Issue a png_benign_error() instead of png_warning() about bad palette index. - In pngtest, treat benign errors as errors if "-strict" is present. - Fixed an off-by-one error in the palette index checking function. - Fixed a compiler warning under Cygwin (Windows-7, 32-bit system) - Revised example.c to put text strings in a temporary character array - instead of directly assigning string constants to png_textp members. - This avoids compiler warnings when -Wwrite-strings is enabled. - Added output flushing to aid debugging under Visual Studio. Unfortunately - this is necessary because the VS2010 output window otherwise simply loses - the error messages on error (they weren't flushed to the window before - the process exited, apparently!) - Added configuration support for benign errors and changed the read - default. Also changed some warnings in the iCCP and sRGB handling - from to benign errors. Configuration now makes read benign - errors warnings and write benign errors to errors by default (thus - changing the behavior on read). The simplified API always forces - read benign errors to warnings (regardless of the system default, unless - this is disabled in which case the simplified API can't be built.) - -Version 1.6.0beta19 [March 18, 2012] - Work around for duplicate row start calls; added warning messages. - This turns on PNG_FLAG_DETECT_UNINITIALIZED to detect app code that - fails to call one of the 'start' routines (not enabled in libpng-1.5 - because it is technically an API change, since it did normally work - before.) It also makes duplicate calls to png_read_start_row (an - internal function called at the start of the image read) benign, as - they were before changes to use png_inflate_claim. Somehow webkit is - causing this to happen; this is probably a mis-feature in the zlib - changes so this commit is only a work-round. - Removed erroneous setting of DETECT_UNINITIALIZED and added more - checks. The code now does a png_error if an attempt is made to do the - row initialization twice; this is an application error and it has - serious consequences because the transform data in png_struct is - changed by each call. - Added application error reporting and added chunk names to read - benign errors; also added --strict to pngstest - not enabled - yet because a warning is produced. - Avoid the double gamma correction warning in the simplified API. - This allows the --strict option to pass in the pngstest checks - -Version 1.6.0beta20 [March 29, 2012] - Changed chunk handler warnings into benign errors, incrementally load iCCP - Added checksum-icc.c to contrib/tools - Prevent PNG_EXPAND+PNG_SHIFT doing the shift twice. - Recognize known sRGB ICC profiles while reading; prefer writing the - iCCP profile over writing the sRGB chunk, controlled by the - PNG_sRGB_PROFILE_CHECKS option. - Revised png_set_text_2() to avoid potential memory corruption (fixes - CVE-2011-3048, also known as CVE-2012-3425). - -Version 1.6.0beta21 [April 27, 2012] - Revised scripts/makefile.darwin: use system zlib; remove quotes around - architecture list; add missing ppc architecture; add architecture options - to shared library link; don't try to create a shared lib based on missing - RELEASE variable. - Enable png_set_check_for_invalid_index() for both read and write. - Removed #ifdef PNG_HANDLE_AS_UNKNOWN_SUPPORTED in pngpriv.h around - declaration of png_handle_unknown(). - Added -lssp_nonshared in a comment in scripts/makefile.freebsd - and changed deprecated NOOBJ and NOPROFILE to NO_OBJ and NO_PROFILE. - -Version 1.6.0beta22 [May 23, 2012] - Removed need for -Wno-cast-align with clang. clang correctly warns on - alignment increasing pointer casts when -Wcast-align is passed. This - fixes the cases that clang warns about either by eliminating the - casts from png_bytep to png_uint_16p (pngread.c), or, for pngrutil.c - where the cast is previously verified or pngstest.c where it is OK, by - introducing new png_aligncast macros to do the cast in a way that clang - accepts. - -Version 1.6.0beta23 [June 6, 2012] - Revised CMakeLists.txt to not attempt to make a symlink under mingw. - Made fixes for new optimization warnings from gcc 4.7.0. The compiler - performs an optimization which is safe; however it then warns about it. - Changing the type of 'palette_number' in pngvalid.c removes the warning. - Do not depend upon a GCC feature macro being available for use in generating - the linker mapfile symbol prefix. - Improved performance of new do_check_palette_indexes() function (only - update the value when it actually increases, move test for whether - the check is wanted out of the function. - -Version 1.6.0beta24 [June 7, 2012] - Don't check palette indexes if num_palette is 0 (as it can be in MNG files). - -Version 1.6.0beta25 [June 16, 2012] - Revised png_set_keep_unknown_chunks() so num_chunks < 0 means ignore all - unknown chunks and all known chunks except for IHDR, PLTE, tRNS, IDAT, - and IEND. Previously it only meant ignore all unknown chunks, the - same as num_chunks == 0. Revised png_image_skip_unused_chunks() to - provide a list of chunks to be processed instead of a list of chunks to - ignore. Revised contrib/gregbook/readpng2.c accordingly. - -Version 1.6.0beta26 [July 10, 2012] - Removed scripts/makefile.cegcc from the *.zip and *.7z distributions; it - depends on configure, which is not included in those archives. - Moved scripts/chkfmt to contrib/tools. - Changed "a+w" to "u+w" in Makefile.in to fix CVE-2012-3386. - -Version 1.6.0beta27 [August 11, 2012] - Do not compile PNG_DEPRECATED, PNG_ALLOC and PNG_PRIVATE when __GNUC__ < 3. - Do not use __restrict when GNUC is <= 3.1 - Removed references to png_zalloc() and png_zfree() from the manual. - Fixed configurations where floating point is completely disabled. Because - of the changes to support symbol prefixing PNG_INTERNAL_FUNCTION declares - floating point APIs during libpng builds even if they are completely - disabled. This requires the png floating point types (png_double*) to be - declared even though the functions are never actually defined. This - change provides a dummy definition so that the declarations work, yet any - implementation will fail to compile because of an incomplete type. - Re-eliminated the use of strcpy() in pngtest.c. An unnecessary use of - strcpy() was accidentally re-introduced in libpng16; this change replaces - it with strncpy(). - Eliminated use of png_sizeof(); use sizeof() instead. - Use a consistent style for (sizeof type) and (sizeof (array)) - Cleanup of png_set_filler(). This function does very different things on - read and write. In libpng 1.6 the two cases can be distinguished and - considerable code cleanup, and extra error checking, is possible. This - makes calls on the write side that have no effect be ignored with a - png_app_error(), which can be disabled in the app using - png_set_benign_errors(), and removes the spurious use of usr_channels - on the read side. - Insist on autotools 1.12.1 for git builds because there are security issues - with 1.12 and insisting on anything less would allow 1.12 to be used. - Removed info_ptr->signature[8] from WRITE-only builds. - Add some conditions for compiling png_fixed(). This is a small function - but it requires "-lm" on some platforms. - Cause pngtest --strict to fail on any warning from libpng (not just errors) - and cause it not to fail at the comparison step if libpng lacks support - for writing chunks that it reads from the input (currently only implemented - for compressed text chunks). - Make all three "make check" test programs work without READ or WRITE support. - Now "make check" will succeed even if libpng is compiled with -DPNG_NO_READ - or -DPNG_NO_WRITE. The tests performed are reduced, but the basic reading - and writing of a PNG file is always tested by one or more of the tests. - Consistently use strlen(), memset(), memcpy(), and memcmp() instead of the - png_strlen(), png_memset(), png_memcpy(), and png_memcmp() macros. - Removed the png_sizeof(), png_strlen(), png_memset(), png_memcpy(), and - png_memcmp() macros. - Work around gcc 3.x and Microsoft Visual Studio 2010 complaints. Both object - to the split initialization of num_chunks. - -Version 1.6.0beta28 [August 29, 2012] - Unknown handling fixes and clean up. This adds more correct option - control of the unknown handling, corrects the pre-existing bug where - the per-chunk 'keep' setting is ignored and makes it possible to skip - IDAT chunks in the sequential reader (broken in earlier 1.6 versions). - There is a new test program, test-unknown.c, which is a work in progress - (not currently part of the test suite). Comments in the header files now - explain how the unknown handling works. - Allow fine grain control of unknown chunk APIs. This change allows - png_set_keep_unknown_chunks() to be turned off if not required and causes - both read and write to behave appropriately (on read this is only possible - if the user callback is used to handle unknown chunks). The change - also removes the support for storing unknown chunks in the info_struct - if the only unknown handling enabled is via the callback, allowing libpng - to be configured with callback reading and none of the unnecessary code. - Corrected fix for unknown handling in pngtest. This reinstates the - libpng handling of unknown chunks other than vpAg and sTER (including - unsafe-to-copy chunks which were dropped before) and eliminates the - repositioning of vpAg and sTER in pngtest.png by changing pngtest.png - (so the chunks are where libpng would put them). - Added "tunknown" test and corrected a logic error in png_handle_unknown() - when SAVE support is absent. Moved the shell test scripts for - contrib/libtests from the libpng top directory to contrib/libtests. - png_handle_unknown() must always read or skip the chunk, if - SAVE_UNKNOWN_CHUNKS is turned off *and* the application does not set - a user callback an unknown chunk will not be read, leading to a read - error, which was revealed by the "tunknown" test. - Cleaned up and corrected ICC profile handling. - contrib/libtests/makepng: corrected 'rgb' and 'gray' cases. profile_error - messages could be truncated; made a correct buffer size calculation and - adjusted pngerror.c appropriately. png_icc_check_* checking improved; - changed the functions to receive the correct color type of the PNG on read - or write and check that it matches the color space of the profile (despite - what the comments said before, there is danger in assuming the app will - cope correctly with an RGB profile on a grayscale image and, since it - violates the PNG spec, allowing it is certain to produce inconsistent - app behavior and might even cause app crashes.) Check that profiles - contain the tags needed to process the PNG (tags all required by the ICC - spec). Removed unused PNG_STATIC from pngpriv.h. - -Version 1.6.0beta29 [September 4, 2012] - Fixed the simplified API example programs to add the *colormap parameter - to several of he API and improved the error message if the version field - is not set. - Added contrib/examples/* to the *.zip and *.7z distributions. - Updated simplified API synopses and description of the png_image structure - in the manual. - Made makepng and pngtest produce identical PNGs, add "--relaxed" option - to pngtest. The "--relaxed" option turns off the benign errors that are - enabled by default in pre-RC builds. makepng can now write ICC profiles - where the length has not been extended to a multiple of 4, and pngtest - now intercepts all libpng errors, allowing the previously-introduced - "--strict test" on no warnings to actually work. - Improved ICC profile handling including cHRM chunk generation and fixed - Cygwin+MSVC build errors. The ICC profile handling now includes more - checking. Several errors that caused rejection of the profile are now - handled with a warning in such a way that the invalid profiles will be - read by default in release (but not pre-RC) builds but will not be - written by default. The easy part of handling the cHRM chunk is written, - where the ICC profile contains the required data. The more difficult - part plus guessing a gAMA value requires code to pass selected RGB values - through the profile. - -Version 1.6.0beta30 [October 24, 2012] - Changed ICC profile matrix/vector types to not depend on array type rules. - By the ANSI-C standard the new types should be identical to the previous - versions, and all known versions of gcc tested with the previous versions - except for GCC-4.2.1 work with this version. The change makes the ANSI-C - rule that const applied to an array of elements applies instead to the - elements in the array moot by explicitly applying const to the base - elements of the png_icc_matrix and png_icc_vector types. The accidental - (harmless) 'const' previously applied to the parameters of two of the - functions have also been removed. - Added a work around for GCC 4.2 optimization bug. - Marked the broken (bad white point) original HP sRGB profiles correctly and - correct comments. - Added -DZ_SOLO to contrib/pngminim/*/makefile to work with zlib-1.2.7 - Use /MDd for vstudio debug builds. Also added pngunkown to the vstudio - builds, fixed build errors and corrected a minor exit code error in - pngvalid if the 'touch' file name is invalid. - Add updated WARNING file to projects/vstudio from libpng 1.5/vstudio - Fixed build when using #define PNG_NO_READ_GAMMA in png_do_compose() in - pngrtran.c (Domani Hannes). - -Version 1.6.0beta31 [November 1, 2012] - Undid the erroneous change to vstudio/pngvalid build in libpng-1.6.0beta30. - Made pngvalid so that it will build outside the libpng source tree. - Made builds -DPNG_NO_READ_GAMMA compile (the unit tests still fail). - Made PNG_NO_READ_GAMMA switch off interfaces that depend on READ_GAMMA. - Prior to 1.6.0 switching off READ_GAMMA did unpredictable things to the - interfaces that use it (specifically, png_do_background in 1.4 would - simply display composite for grayscale images but do composition - with the incorrect arithmetic for color ones). In 1.6 the semantic - of -DPNG_NO_READ_GAMMA is changed to simply disable any interface that - depends on it; this obliges people who set it to consider whether they - really want it off if they happen to use any of the interfaces in - question (typically most users who disable it won't). - Fixed GUIDs in projects/vstudio. Some were duplicated or missing, - resulting in VS2010 having to update the files. - Removed non-working ICC profile support code that was mostly added to - libpng-1.6.0beta29 and beta30. There was too much code for too little - gain; implementing full ICC color correction may be desirable but is left - up to applications. - -Version 1.6.0beta32 [November 25, 2012] - Fixed an intermittent SEGV in pngstest due to an uninitialized array element. - Added the ability for contrib/libtests/makepng.c to make a PNG with just one - color. This is useful for debugging pngstest color inaccuracy reports. - Fixed error checking in the simplified write API (Olaf van der Spek) - Made png_user_version_check() ok to use with libpng version 1.10.x and later. - -Version 1.6.0beta33 [December 15, 2012] - Fixed typo in png.c (PNG_SET_CHUNK_MALLOC_MAX should be PNG_CHUNK_MALLOC_MAX) - that causes the MALLOC_MAX limit not to work (John Bowler) - Change png_warning() to png_app_error() in pngwrite.c and comment the - fall-through condition. - Change png_warning() to png_app_warning() in png_write_tRNS(). - Rearranged the ARM-NEON optimizations: Isolated the machine specific code - to the hardware subdirectory and added comments to pngrutil.c so that - implementors of other optimizations know what to do. - Fixed cases of unquoted DESTDIR in Makefile.am - Rebuilt Makefile.in, etc., with autoconf-2.69 and automake-1.12.5. - -Version 1.6.0beta34 [December 19, 2012] - Cleaned up whitespace in the synopsis portion of the manpage "libpng.3" - Disassembled the version number in scripts/options.awk (necessary for - building on SunOs). - -Version 1.6.0beta35 [December 23, 2012] - Made default Zlib compression settings be configurable. This adds #defines to - pnglibconf.h to control the defaults. - Fixed Windows build issues, enabled ARM compilation. Various warnings issued - by earlier versions of GCC fixed for Cygwin and Min/GW (which both use old - GCCs.) ARM support is enabled by default in zlib.props (unsupported by - Microsoft) and ARM compilation is made possible by deleting the check for - x86. The test programs cannot be run because they are not signed. - -Version 1.6.0beta36 [January 2, 2013] - Discontinued distributing libpng-1.x.x.tar.bz2. - Discontinued distributing libpng-1.7.0-1.6.0-diff.txt and similar. - Rebuilt configure with autoconf-2.69 (inadvertently not done in beta33) - Fixed 'make distcheck' on SUN OS - libpng.so was not being removed - -Version 1.6.0beta37 [January 10, 2013] - Fixed conceivable but difficult to repro overflow. Also added two test - programs to generate and test a PNG which should have the problem. - -Version 1.6.0beta39 [January 19, 2013] - Again corrected attempt at overflow detection in png_set_unknown_chunks() - (CVE-2013-7353). Added overflow detection in png_set_sPLT() and - png_set_text_2() (CVE-2013-7354). - -Version 1.6.0beta40 [January 20, 2013] - Use consistent handling of overflows in text, sPLT and unknown png_set_* APIs - -Version 1.6.0rc01 [January 26, 2013] - No changes. - -Version 1.6.0rc02 [February 4, 2013] - Added png_get_palette_max() function. - -Version 1.6.0rc03 [February 5, 2013] - Fixed the png_get_palette_max API. - -Version 1.6.0rc04 [February 7, 2013] - Turn serial tests back on (recently turned off by autotools upgrade). - -Version 1.6.0rc05 [February 8, 2013] - Update manual about png_get_palette_max(). - -Version 1.6.0rc06 [February 9, 2013] - Fixed missing dependency in --prefix builds The intermediate - internal 'prefix.h' file can only be generated correctly after - pnglibconf.h, however the dependency was not in Makefile.am. The - symptoms are unpredictable depending on the order make chooses to - build pngprefix.h and pnglibconf.h, often the error goes unnoticed - because there is a system pnglibconf.h to use instead. - -Version 1.6.0rc07 [February 10, 2013] - Enclosed the new png_get_palette_max in #ifdef PNG_GET_PALETTE_MAX_SUPPORTED - block, and revised pnglibconf.h and pnglibconf.h.prebuilt accordingly. - -Version 1.6.0rc08 [February 10, 2013] - Fix typo in png.h #ifdef - -Version 1.6.0 [February 14, 2013] - No changes. - -Version 1.6.1beta01 [February 16, 2013] - Made symbol prefixing work with the ARM neon optimizations. Also allow - pngpriv.h to be included for preprocessor definitions only, so it can - be used in non-C/C++ files. Back ported from libpng 1.7. - Made sRGB check numbers consistent. - Ported libpng 1.5 options.awk/dfn file handling to 1.6, fixed one bug. - Removed cc -E workround, corrected png_get_palette_max API Tested on - SUN OS cc 5.9, which demonstrates the tokenization problem previously - avoided by using /lib/cpp. Since all .dfn output is now protected in - double quotes unless it is to be macro substituted the fix should - work everywhere. - Enabled parallel tests - back ported from libpng-1.7. - scripts/pnglibconf.dfa formatting improvements back ported from libpng17. - Fixed a race condition in the creation of the build 'scripts' directory - while building with a parallel make. - Use approved/supported Android method to check for NEON, use Linux/POSIX - 1003.1 API to check /proc/self/auxv avoiding buffer allocation and other - library calls (ported from libpng15). - -Version 1.6.1beta02 [February 19, 2013] - Use parentheses more consistently in "#if defined(MACRO)" tests. - Folded long lines. - Reenabled code to allow zero length PLTE chunks for MNG. - -Version 1.6.1beta03 [February 22, 2013] - Fixed ALIGNED_MEMORY support. - Added a new configure option: - --enable-arm-neon=always will stop the run-time checks. New checks - within arm/arm_init.c will cause the code not to be compiled unless - __ARM_NEON__ is set. This should make it fail safe (if someone asks - for it on then the build will fail if it can't be done.) - Updated the INSTALL document. - -Version 1.6.1beta04 [February 27, 2013] - Revised INSTALL to recommend using CPPFLAGS instead of INCLUDES. - Revised scripts/makefile.freebsd to respect ZLIBLIB and ZLIBINC. - Revised scripts/dfn.awk to work with the buggy MSYS awk that has trouble - with CRLF line endings. - -Version 1.6.1beta05 [March 1, 2013] - Avoid a possible memory leak in contrib/gregbook/readpng.c - -Version 1.6.1beta06 [March 4, 2013] - Better documentation of unknown handling API interactions. - Corrected Android builds and corrected libpng.vers with symbol - prefixing. It also makes those tests compile and link on Android. - Added an API png_set_option() to set optimization options externally, - providing an alternative and general solution for the non-portable - run-time tests used by the ARM Neon code, using the PNG_ARM_NEON option. - The order of settings vs options in pnglibconf.h is reversed to allow - settings to depend on options and options can now set (or override) the - defaults for settings. - -Version 1.6.1beta07 [March 7, 2013] - Corrected simplified API default gamma for color-mapped output, added - a flag to change default. In 1.6.0 when the simplified API was used - to produce color-mapped output from an input image with no gamma - information the gamma assumed for the input could be different from - that assumed for non-color-mapped output. In particular 16-bit depth - input files were assumed to be sRGB encoded, whereas in the 'direct' - case they were assumed to have linear data. This was an error. The - fix makes the simplified API treat all input files the same way and - adds a new flag to the png_image::flags member to allow the - application/user to specify that 16-bit files contain sRGB data - rather than the default linear. - Fixed bugs in the pngpixel and makepng test programs. - -Version 1.6.1beta08 [March 7, 2013] - Fixed CMakelists.txt to allow building a single variant of the library - (Claudio Bley): - Introduced a PNG_LIB_TARGETS variable that lists all activated library - targets. It is an error if this variable ends up empty, ie. you have - to build at least one library variant. - Made the *_COPY targets only depend on library targets actually being build. - Use PNG_LIB_TARGETS to unify a code path. - Changed the CREATE_SYMLINK macro to expect the full path to a file as the - first argument. When symlinking the filename component of that path is - determined and used as the link target. - Use copy_if_different in the CREATE_SYMLINK macro. - -Version 1.6.1beta09 [March 13, 2013] - Eliminated two warnings from the Intel C compiler. The warnings are - technically valid, although a reasonable treatment of division would - show it to be incorrect. - -Version 1.6.1rc01 [March 21, 2013] - No changes. - -Version 1.6.1 [March 28, 2013] - No changes. - -Version 1.6.2beta01 [April 14, 2013] - Updated documentation of 1.5.x to 1.6.x changes in iCCP chunk handling. - Fixed incorrect warning of excess deflate data. End condition - the - warning would be produced if the end of the deflate stream wasn't read - in the last row. The warning is harmless. - Corrected the test on user transform changes on read. It was in the - png_set of the transform function, but that doesn't matter unless the - transform function changes the rowbuf size, and that is only valid if - transform_info is called. - Corrected a misplaced closing bracket in contrib/libtests/pngvalid.c - (Flavio Medeiros). - Corrected length written to uncompressed iTXt chunks (Samuli Suominen). - Bug was introduced in libpng-1.6.0. - -Version 1.6.2rc01 [April 18, 2013] - Added contrib/tools/fixitxt.c, to repair the erroneous iTXt chunk length - written by libpng-1.6.0 and 1.6.1. - Disallow storing sRGB information when the sRGB is not supported. - -Version 1.6.2rc02 [April 18, 2013] - Merge pngtest.c with libpng-1.7.0 - -Version 1.6.2rc03 [April 22, 2013] - Trivial spelling cleanup. - -Version 1.6.2rc04 and 1.6.2rc05 [omitted] - -Version 1.6.2rc06 [April 24, 2013] - Reverted to version 1.6.2rc03. Recent changes to arm/neon support - have been ported to libpng-1.7.0beta09 and will reappear in version - 1.6.3beta01. - -Version 1.6.2 [April 25, 2013] - No changes. - -Version 1.6.3beta01 [April 25, 2013] - Revised stack marking in arm/filter_neon.S and configure.ac. - Ensure that NEON filter stuff is completely disabled when switched 'off'. - Previously the ARM NEON specific files were still built if the option - was switched 'off' as opposed to being explicitly disabled. - -Version 1.6.3beta02 [April 26, 2013] - Test for 'arm*' not just 'arm' in the host_cpu configure variable. - Rebuilt the configure scripts. - -Version 1.6.3beta03 [April 30, 2013] - Expanded manual paragraph about writing private chunks, particularly - the need to call png_set_keep_unknown_chunks() when writing them. - Avoid dereferencing NULL pointer possibly returned from - png_create_write_struct() (Andrew Church). - -Version 1.6.3beta05 [May 9, 2013] - Calculate our own zlib windowBits when decoding rather than trusting the - CMF bytes in the PNG datastream. - Added an option to force maximum window size for inflating, which was - the behavior of libpng15 and earlier, via a new PNG_MAXIMUM_INFLATE_WINDOW - option for png_set_options(). - Added png-fix-itxt and png-fix-too-far-back to the built programs and - removed warnings from the source code and timepng that are revealed as - a result. - Detect wrong libpng versions linked to png-fix-too-far-back, which currently - only works with libpng versions that can be made to reliably fail when - the deflate data contains an out-of-window reference. This means only - 1.6 and later. - Fixed gnu issues: g++ needs a static_cast, gcc 4.4.7 has a broken warning - message which it is easier to work round than ignore. - Updated contrib/pngminus/pnm2png.c (Paul Stewart): - Check for EOF - Ignore "#" delimited comments in input file to pnm2png.c. - Fixed whitespace handling - Added a call to png_set_packing() - Initialize dimension values so if sscanf fails at least we have known - invalid values. - Attempt to detect configuration issues with png-fix-too-far-back, which - requires both the correct libpng and the correct zlib to function - correctly. - Check ZLIB_VERNUM for mismatches, enclose #error in quotes - Added information in the documentation about problems with and fixes for - the bad CRC and bad iTXt chunk situations. - -Version 1.6.3beta06 [May 12, 2013] - Allow contrib/pngminus/pnm2png.c to compile without WRITE_INVERT and - WRITE_PACK supported (writes error message that it can't read P1 or - P4 PBM files). - Improved png-fix-too-far-back usage message, added --suffix option. - Revised contrib/pngminim/*/makefile to generate pnglibconf.h with the - right zlib header files. - Separated CPPFLAGS and CFLAGS in contrib/pngminim/*/makefile - -Version 1.6.3beta07 [June 8, 2013] - Removed a redundant test in png_set_IHDR(). - Added set(CMAKE_CONFIGURATION_TYPES ...) to CMakeLists.txt (Andrew Hundt) - Deleted set(CMAKE_BUILD_TYPE) block from CMakeLists.txt - Enclose the prototypes for the simplified write API in - #ifdef PNG_STDIO_SUPPORTED/#endif - Make ARM NEON support work at compile time (not just configure time). - This moves the test on __ARM_NEON__ into pngconf.h to avoid issues when - using a compiler that compiles for multiple architectures at one time. - Removed PNG_FILTER_OPTIMIZATIONS and PNG_ARM_NEON_SUPPORTED from - pnglibconf.h, allowing more of the decisions to be made internally - (pngpriv.h) during the compile. Without this, symbol prefixing is broken - under certain circumstances on ARM platforms. Now only the API parts of - the optimizations ('check' vs 'api') are exposed in the public header files - except that the new setting PNG_ARM_NEON_OPT documents how libpng makes the - decision about whether or not to use the optimizations. - Protect symbol prefixing against CC/CPPFLAGS/CFLAGS usage. - Previous iOS/Xcode fixes for the ARM NEON optimizations moved the test - on __ARM_NEON__ from configure time to compile time. This breaks symbol - prefixing because the definition of the special png_init_filter_functions - call was hidden at configure time if the relevant compiler arguments are - passed in CFLAGS as opposed to CC. This change attempts to avoid all - the confusion that would result by declaring the init function even when - it is not used, so that it will always get prefixed. - -Version 1.6.3beta08 [June 18, 2013] - Revised libpng.3 so that "doclifter" can process it. - -Version 1.6.3beta09 [June 27, 2013] - Revised example.c to illustrate use of PNG_DEFAULT_sRGB and PNG_GAMMA_MAC_18 - as parameters for png_set_gamma(). These have been available since - libpng-1.5.4. - Renamed contrib/tools/png-fix-too-far-back.c to pngfix.c and revised it - to check all compressed chunks known to libpng. - -Version 1.6.3beta10 [July 5, 2013] - Updated documentation to show default behavior of benign errors correctly. - Only compile ARM code when PNG_READ_SUPPORTED is defined. - Fixed undefined behavior in contrib/tools/pngfix.c and added new strip - option. pngfix relied on undefined behavior and even a simple change from - gcc to g++ caused it to fail. The new strip option 'unsafe' has been - implemented and is the default if --max is given. Option names have - been clarified, with --strip=transform now stripping the bKGD chunk, - which was stripped previously with --strip=unused. - Added all documented chunk types to pngpriv.h - Unified pngfix.c source with libpng17. - -Version 1.6.3rc01 [July 11, 2013] - No changes. - -Version 1.6.3 [July 18, 2013] - Revised manual about changes in iTXt chunk handling made in libpng-1.6.0. - Added "/* SAFE */" comments in pngrutil.c and pngrtran.c where warnings - may be erroneously issued by code-checking applications. - -Version 1.6.4beta01 [August 21, 2013] - Added information about png_set_options() to the manual. - Delay calling png_init_filter_functions() until a row with nonzero filter - is found. - -Version 1.6.4beta02 [August 30, 2013] - Fixed inconsistent conditional compilation of png_chunk_unknown_handling() - prototype, definition, and usage. Made it depend on - PNG_HANDLE_AS_UNKNOWN_SUPPORTED everywhere. - -Version 1.6.4rc01 [September 5, 2013] - No changes. - -Version 1.6.4 [September 12, 2013] - No changes. - -Version 1.6.5 [September 14, 2013] - Removed two stray lines of code from arm/arm_init.c. - -Version 1.6.6 [September 16, 2013] - Removed two stray lines of code from arm/arm_init.c, again. - -Version 1.6.7beta01 [September 30, 2013] - Revised unknown chunk code to correct several bugs in the NO_SAVE_/NO_WRITE - combination - Allow HANDLE_AS_UNKNOWN to work when other options are configured off. Also - fixed the pngminim makefiles to work when $(MAKEFLAGS) contains stuff - which terminates the make options (as by default in recent versions of - Gentoo). - Avoid up-cast warnings in pngvalid.c. On ARM the alignment requirements of - png_modifier are greater than that of png_store and as a consequence - compilation of pngvalid.c results in a warning about increased alignment - requirements because of the bare cast to (png_modifier*). The code is safe, - because the pointer is known to point to a stack allocated png_modifier, - but this change avoids the warning. - Fixed default behavior of ARM_NEON_API. If the ARM NEON API option was - compiled without the CHECK option it defaulted to on, not off. - Check user callback behavior in pngunknown.c. Previous versions compiled - if SAVE_UNKNOWN was not available but did nothing since the callback - was never implemented. - Merged pngunknown.c with 1.7 version and back ported 1.7 improvements/fixes - -Version 1.6.7beta02 [October 12, 2013] - Made changes for compatibility with automake 1.14: - 1) Added the 'compile' program to the list of programs that must be cleaned - in autogen.sh - 2) Added 'subdir-objects' which causes .c files in sub-directories to be - compiled such that the corresponding .o files are also in the - sub-directory. This is because automake 1.14 warns that the - current behavior of compiling to the top level directory may be removed - in the future. - 3) Updated dependencies on pnglibconf.h to match the new .o locations and - added all the files in contrib/libtests and contrib/tools that depend - on pnglibconf.h - 4) Added 'BUILD_SOURCES = pnglibconf.h'; this is the automake recommended - way of handling the dependencies of sources that are machine generated; - unfortunately it only works if the user does 'make all' or 'make check', - so the dependencies (3) are still required. - Cleaned up (char*) casts of zlib messages. The latest version of the Intel C - compiler complains about casting a string literal as (char*), so copied the - treatment of z_const from the library code into pngfix.c - Simplified error message code in pngunknown. The simplification has the - useful side effect of avoiding a bogus warning generated by the latest - version of the Intel C compiler (it objects to - condition ? string-literal : string-literal). - Make autogen.sh work with automake 1.13 as well as 1.14. Do this by always - removing the 1.14 'compile' script but never checking for it. - -Version 1.6.7beta03 [October 19, 2013] - Added ARMv8 support (James Yu ). Added file - arm/filter_neon_intrinsics.c; enable with -mfpu=neon. - Revised pngvalid to generate size images with as many filters as it can - manage, limited by the number of rows. - Cleaned up ARM NEON compilation handling. The tests are now in pngpriv.h - and detect the broken GCC compilers. - -Version 1.6.7beta04 [October 26, 2013] - Allow clang derived from older GCC versions to use ARM intrinsics. This - causes all clang builds that use -mfpu=neon to use the intrinsics code, - not the assembler code. This has only been tested on iOS 7. It may be - necessary to exclude some earlier clang versions but this seems unlikely. - Changed NEON implementation selection mechanism. This allows assembler - or intrinsics to be turned on at compile time during the build by defining - PNG_ARM_NEON_IMPLEMENTATION to the correct value (2 or 1). This macro - is undefined by default and the build type is selected in pngpriv.h. - -Version 1.6.7rc01 [November 2, 2013] - No changes. - -Version 1.6.7rc02 [November 7, 2013] - Fixed #include in filter_neon_intrinsics.c and ctype macros. The ctype char - checking macros take an unsigned char argument, not a signed char. - -Version 1.6.7 [November 14, 2013] - No changes. - -Version 1.6.8beta01 [November 24, 2013] - Moved prototype for png_handle_unknown() in pngpriv.h outside of - the #ifdef PNG_SET_UNKNOWN_CHUNKS_SUPPORTED/#endif block. - Added "-Wall" to CFLAGS in contrib/pngminim/*/makefile - Conditionally compile some unused functions reported by -Wall in - pngminim. - Fixed 'minimal' builds. Various obviously useful minimal configurations - don't build because of missing contrib/libtests test programs and - overly complex dependencies in scripts/pnglibconf.dfa. This change - adds contrib/conftest/*.dfa files that can be used in automatic build - scripts to ensure that these configurations continue to build. - Enabled WRITE_INVERT and WRITE_PACK in contrib/pngminim/encoder. - Fixed pngvalid 'fail' function declaration on the Intel C Compiler. - This reverts to the previous 'static' implementation and works round - the 'unused static function' warning by using PNG_UNUSED(). - -Version 1.6.8beta02 [November 30, 2013] - Removed or marked PNG_UNUSED some harmless "dead assignments" reported - by clang scan-build. - Changed tabs to 3 spaces in png_debug macros and changed '"%s"m' - to '"%s" m' to improve portability among compilers. - Changed png_free_default() to free() in pngtest.c - -Version 1.6.8rc01 [December 12, 2013] - Tidied up pngfix inits and fixed pngtest no-write builds. - -Version 1.6.8rc02 [December 14, 2013] - Handle zero-length PLTE chunk or NULL palette with png_error() - instead of png_chunk_report(), which by default issues a warning - rather than an error, leading to later reading from a NULL pointer - (png_ptr->palette) in png_do_expand_palette(). This is CVE-2013-6954 - and VU#650142. Libpng-1.6.1 through 1.6.7 are vulnerable. - Libpng-1.6.0 and earlier do not have this bug. - -Version 1.6.8 [December 19, 2013] - No changes. - -Version 1.6.9beta01 [December 26, 2013] - Bookkeeping: Moved functions around (no changes). Moved transform - function definitions before the place where they are called so that - they can be made static. Move the intrapixel functions and the - grayscale palette builder out of the png?tran.c files. The latter - isn't a transform function and is no longer used internally, and the - former MNG specific functions are better placed in pngread/pngwrite.c - Made transform implementation functions static. This makes the internal - functions called by png_do_{read|write}_transformations static. On an - x86-64 DLL build (Gentoo Linux) this reduces the size of the text - segment of the DLL by 1208 bytes, about 0.6%. It also simplifies - maintenance by removing the declarations from pngpriv.h and allowing - easier changes to the internal interfaces. - Rebuilt configure scripts with automake-1.14.1 and autoconf-2.69 - in the tar distributions. - -Version 1.6.9beta02 [January 1, 2014] - Added checks for libpng 1.5 to pngvalid.c. This supports the use of - this version of pngvalid in libpng 1.5 - Merged with pngvalid.c from libpng-1.7 changes to create a single - pngvalid.c - Removed #error macro from contrib/tools/pngfix.c (Thomas Klausner). - Merged pngrio.c, pngtrans.c, pngwio.c, and pngerror.c with libpng-1.7.0 - Merged libpng-1.7.0 changes to make no-interlace configurations work - with test programs. - Revised pngvalid.c to support libpng 1.5, which does not support the - PNG_MAXIMUM_INFLATE_WINDOW option, so #define it out when appropriate in - pngvalid.c - Allow unversioned links created on install to be disabled in configure. - In configure builds 'make install' changes/adds links like png.h - and libpng.a to point to the newly installed, versioned, files (e.g. - libpng17/png.h and libpng17.a). Three new configure options and some - rearrangement of Makefile.am allow creation of these links to be disabled. - -Version 1.6.9beta03 [January 10, 2014] - Removed potentially misleading warning from png_check_IHDR(). - -Version 1.6.9beta04 [January 20, 2014] - Updated scripts/makefile.* to use CPPFLAGS (Cosmin). - Added clang attribute support (Cosmin). - -Version 1.6.9rc01 [January 28, 2014] - No changes. - -Version 1.6.9rc02 [January 30, 2014] - Quiet an uninitialized memory warning from VC2013 in png_get_png(). - -Version 1.6.9 [February 6, 2014] - -Version 1.6.10beta01 [February 9, 2014] - Backported changes from libpng-1.7.0beta30 and beta31: - Fixed a large number of instances where PNGCBAPI was omitted from - function definitions. - Added pngimage test program for png_read_png() and png_write_png() - with two new test scripts. - Removed dependence on !PNG_READ_EXPAND_SUPPORTED for calling - png_set_packing() in png_read_png(). - Fixed combination of ~alpha with shift. On read invert alpha, processing - occurred after shift processing, which causes the final values to be - outside the range that should be produced by the shift. Reversing the - order on read makes the two transforms work together correctly and mirrors - the order used on write. - Do not read invalid sBIT chunks. Previously libpng only checked sBIT - values on write, so a malicious PNG writer could therefore cause - the read code to return an invalid sBIT chunk, which might lead to - application errors or crashes. Such chunks are now skipped (with - chunk_benign_error). - Make png_read_png() and png_write_png() prototypes in png.h depend - upon PNG_READ_SUPPORTED and PNG_WRITE_SUPPORTED. - Support builds with unsupported PNG_TRANSFORM_* values. All of the - PNG_TRANSFORM_* values are always defined in png.h and, because they - are used for both read and write in some cases, it is not reliable - to #if out ones that are totally unsupported. This change adds error - detection in png_read_image() and png_write_image() to do a - png_app_error() if the app requests something that cannot be done - and it adds corresponding code to pngimage.c to handle such options - by not attempting to test them. - -Version 1.6.10beta02 [February 23, 2014] - Moved redefines of png_error(), png_warning(), png_chunk_error(), - and png_chunk_warning() from pngpriv.h to png.h to make them visible - to libpng-calling applications. - Moved OS dependent code from arm/arm_init.c, to allow the included - implementation of the ARM NEON discovery function to be set at - build-time and provide sample implementations from the current code in the - contrib/arm-neon subdirectory. The __linux__ code has also been changed to - compile and link on Android by using /proc/cpuinfo, and the old linux code - is in contrib/arm-neon/linux-auxv.c. The new code avoids POSIX and Linux - dependencies apart from opening /proc/cpuinfo and is C90 compliant. - Check for info_ptr == NULL early in png_read_end() so we don't need to - run all the png_handle_*() and depend on them to return if info_ptr == NULL. - This improves the performance of png_read_end(png_ptr, NULL) and makes - it more robust against future programming errors. - Check for __has_extension before using it in pngconf.h, to - support older Clang versions (Jeremy Sequoia). - Treat CRC error handling with png_set_crc_action(), instead of with - png_set_benign_errors(), which has been the case since libpng-1.6.0beta18. - Use a user warning handler in contrib/gregbook/readpng2.c instead of default, - so warnings will be put on stderr even if libpng has CONSOLE_IO disabled. - Added png_ptr->process_mode = PNG_READ_IDAT_MODE in png_push_read_chunk - after recognizing the IDAT chunk, which avoids an infinite loop while - reading a datastream whose first IDAT chunk is of zero-length. - This fixes CERT VU#684412 and CVE-2014-0333. - Don't recognize known sRGB profiles as sRGB if they have been hacked, - but don't reject them and don't issue a copyright violation warning. - -Version 1.6.10beta03 [February 25, 2014] - Moved some documentation from png.h to libpng.3 and libpng-manual.txt - Minor editing of contrib/arm-neon/README and contrib/examples/*.c - -Version 1.6.10rc01 [February 27, 2014] - Fixed typos in the manual and in scripts/pnglibconf.dfa (CFLAGS -> CPPFLAGS - and PNG_USR_CONFIG -> PNG_USER_CONFIG). - -Version 1.6.10rc02 [February 28, 2014] - Removed unreachable return statement after png_chunk_error() - in pngrutil.c - -Version 1.6.10rc03 [March 4, 2014] - Un-deprecated png_data_freer(). - -Version 1.6.10 [March 6, 2014] - No changes. - -Version 1.6.11beta01 [March 17, 2014] - Use "if (value != 0)" instead of "if (value)" consistently. - Changed ZlibSrcDir from 1.2.5 to 1.2.8 in projects/vstudio. - Moved configuration information from the manual to the INSTALL file. - -Version 1.6.11beta02 [April 6, 2014] - Removed #if/#else/#endif from inside two pow() calls in pngvalid.c because - they were handled improperly by Portland Group's PGI-14.1 - PGI-14.3 - when using its "__builtin_pow()" function. - Silence 'unused parameter' build warnings (Cosmin Truta). - $(CP) is now used alongside $(RM_F). Also, use 'copy' instead of 'cp' - where applicable, and applied other minor makefile changes (Cosmin). - Don't warn about invalid dimensions exceeding user limits (Cosmin). - Allow an easy replacement of the default pre-built configuration - header with a custom header, via the make PNGLIBCONF_H_PREBUILT - macro (Cosmin). - -Version 1.6.11beta03 [April 6, 2014] - Fixed a typo in pngrutil.c, introduced in libpng-1.5.6, that interferes - with "blocky" expansion of sub-8-bit interlaced PNG files (Eric Huss). - Optionally use __builtin_bswap16() in png_do_swap(). - -Version 1.6.11beta04 [April 19, 2014] - Made progressive reading of interlaced images consistent with the - behavior of the sequential reader and consistent with the manual, by - moving some code out of the PNG_READ_INTERLACING_SUPPORTED blocks. The - row_callback now receives the proper pass number and unexpanded rows, when - png_combine_row() isn't built or used, and png_set_interlace_handling() - is not called. - Allow PNG_sRGB_PROFILE_CHECKING = (-1) to mean no sRGB profile checking. - -Version 1.6.11beta05 [April 26, 2014] - Do not reject ICC V2 profiles that lack padding (Kai-Uwe Behrmann). - Relocated closing bracket of the sRGB profile test loop to avoid getting - "Not recognizing known sRGB profile that has been edited" warning for - ICC V2 profiles that lack the MD5 signature in the profile header. - -Version 1.6.11beta06 [May 19, 2014] - Added PNG_SKIP_sRGB_CHECK_PROFILE choice for png_set_option(). - -Version 1.6.11rc01 [May 27, 2014] - No changes. - -Version 1.6.11rc02 [June 3, 2014] - Test ZLIB_VERNUM instead of PNG_ZLIB_VERNUM in contrib/tools/pngfix.c - -Version 1.6.11 [June 5, 2014] - No changes. - -Version 1.6.12rc01 [June 6, 2014] - Relocated new code from 1.6.11beta06 in png.c to a point after the - declarations (Max Stepin). - -Version 1.6.12rc02 [June 7, 2014] - Changed file permissions of contrib/tools/intgamma.sh, - test-driver, and compile from 0644 to 0755 (Cosmin). - -Version 1.6.12rc03 [June 8, 2014] - Ensure "__has_attribute()" macro exists before trying to use it with - old clang compilers (MacPorts Ticket #43939). - -Version 1.6.12 [June 12, 2014] - No changes. - -Version 1.6.13beta01 [July 4, 2014] - Quieted -Wsign-compare and -Wclobber compiler warnings in - contrib/pngminus/*.c - Added "(void) png_ptr;" where needed in contrib/gregbook to quiet - compiler complaints about unused pointers. - Split a long output string in contrib/gregbook/rpng2-x.c. - Added "PNG_SET_OPTION" requirement for sRGB chunk support to pnglibconf.dfa, - Needed for write-only support (John Bowler). - Changed "if defined(__ARM_NEON__)" to - "if (defined(__ARM_NEON__) || defined(__ARM_NEON))" (James Wu). - Fixed clang no-warning builds: png_digit was defined but never used. - -Version 1.6.13beta02 [July 21, 2014] - Fixed an incorrect separator ("/" should be "\") in scripts/makefile.vcwin32 - (bug report from Wolfgang S. Kechel). Bug was introduced in libpng-1.6.11. - Also fixed makefile.bc32, makefile.bor, makefile.msc, makefile.intel, and - makefile.tc3 similarly. - -Version 1.6.13beta03 [August 3, 2014] - Removed scripts/makefile.elf. It has not worked since libpng-1.5.0beta14 - due to elimination of the PNG_FUNCTION_EXPORT and PNG_DATA_EXPORT - definitions from pngconf.h. - Ensure that CMakeLists.txt makes the target "lib" directory before making - symbolic link into it (SourceForge bug report #226 by Rolf Timmermans). - -Version 1.6.13beta04 [August 8, 2014] - Added opinion that the ECCN (Export Control Classification Number) for - libpng is EAR99 to the README file. - Eliminated use of "$<" in makefile explicit rules, when copying - $PNGLIBCONF_H_PREBUILT. This does not work on some versions of make; - bug introduced in libpng version 1.6.11. - -Version 1.6.13rc01 [August 14, 2014] - Made "ccopts" agree with "CFLAGS" in scripts/makefile.hp* and makefile.*sunu - -Version 1.6.13 [August 21, 2014] - No changes. - -Version 1.6.14beta01 [September 14, 2014] - Guard usage of png_ptr->options with #ifdef PNG_SET_OPTION_SUPPORTED. - Do not build contrib/tools/pngfix.c when PNG_SETJMP_NOT_SUPPORTED, - to allow "make" to complete without setjmp support (bug report by - Claudio Fontana) - Add "#include " to contrib/tools/pngfix.c (John Bowler) - -Version 1.6.14beta02 [September 18, 2014] - Use nanosleep() instead of usleep() in contrib/gregbook/rpng2-x.c - because usleep() is deprecated. - Define usleep() in contrib/gregbook/rpng2-x.c if not already defined - in unistd.h and nanosleep() is not available; fixes error introduced - in libpng-1.6.13. - Disable floating point exception handling in pngvalid.c when - PNG_FLOATING_ARITHMETIC is not supported (bug report by "zootus - at users.sourceforge.net"). - -Version 1.6.14beta03 [September 19, 2014] - Define FE_DIVBYZERO, FE_INVALID, and FE_OVERFLOW in pngvalid.c if not - already defined. Revert floating point exception handling in pngvalid.c - to version 1.6.14beta01 behavior. - -Version 1.6.14beta04 [September 27, 2014] - Fixed incorrect handling of the iTXt compression flag in pngrutil.c - (bug report by Shunsaku Hirata). Bug was introduced in libpng-1.6.0. - -Version 1.6.14beta05 [October 1, 2014] - Added "option READ_iCCP enables READ_COMPRESSED_TEXT" to pnglibconf.dfa - -Version 1.6.14beta06 [October 5, 2014] - Removed unused "text_len" parameter from private function png_write_zTXt(). - Conditionally compile some code in png_deflate_claim(), when - PNG_WARNINGS_SUPPORTED and PNG_ERROR_TEXT_SUPPORTED are disabled. - Replaced repeated code in pngpread.c with PNG_PUSH_SAVE_BUFFER_IF_FULL. - Added "chunk iTXt enables TEXT" and "chunk zTXt enables TEXT" - to pnglibconf.dfa. - Removed "option READ_COMPRESSED_TEXT enables READ_TEXT" from pnglibconf.dfa, - to make it possible to configure a libpng that supports iCCP but not TEXT. - -Version 1.6.14beta07 [October 7, 2014] - Removed "option WRITE_COMPRESSED_TEXT enables WRITE_TEXT" from pnglibconf.dfa - Only mark text chunks as written after successfully writing them. - -Version 1.6.14rc01 [October 15, 2014] - Fixed some typos in comments. - -Version 1.6.14rc02 [October 17, 2014] - Changed png_convert_to_rfc_1123() to png_convert_to_rfc_1123_buffer() - in the manual, to reflect the change made in libpng-1.6.0. - Updated README file to explain that direct access to the png_struct - and info_struct members has not been permitted since libpng-1.5.0. - -Version 1.6.14 [October 23, 2014] - No changes. - -Version 1.6.15beta01 [October 29, 2014] - Changed "if (!x)" to "if (x == 0)" and "if (x)" to "if (x != 0)" - Simplified png_free_data(). - Added missing "ptr = NULL" after some instances of png_free(). - -Version 1.6.15beta02 [November 1, 2014] - Changed remaining "if (!x)" to "if (x == 0)" and "if (x)" to "if (x != 0)" - -Version 1.6.15beta03 [November 3, 2014] - Added PNG_USE_ARM_NEON configuration flag (Marcin Juszkiewicz). - -Version 1.6.15beta04 [November 4, 2014] - Removed new PNG_USE_ARM_NEON configuration flag and made a one-line - revision to configure.ac to support ARM on aarch64 instead (John Bowler). - -Version 1.6.15beta05 [November 5, 2014] - Use png_get_libpng_ver(NULL) instead of PNG_LIBPNG_VER_STRING in - example.c, pngtest.c, and applications in the contrib directory. - Fixed an out-of-range read in png_user_version_check() (Bug report from - Qixue Xiao, CVE-2015-8540). - Simplified and future-proofed png_user_version_check(). - Fixed GCC unsigned int->float warnings. Various versions of GCC - seem to generate warnings when an unsigned value is implicitly - converted to double. This is probably a GCC bug but this change - avoids the issue by explicitly converting to (int) where safe. - Free all allocated memory in pngimage. The file buffer cache was left - allocated at the end of the program, harmless but it causes memory - leak reports from clang. - Fixed array size calculations to avoid warnings. At various points - in the code the number of elements in an array is calculated using - sizeof. This generates a compile time constant of type (size_t) which - is then typically assigned to an (unsigned int) or (int). Some versions - of GCC on 64-bit systems warn about the apparent narrowing, even though - the same compiler does apparently generate the correct, in-range, - numeric constant. This adds appropriate, safe, casts to make the - warnings go away. - -Version 1.6.15beta06 [November 6, 2014] - Reverted use png_get_libpng_ver(NULL) instead of PNG_LIBPNG_VER_STRING - in the manual, example.c, pngtest.c, and applications in the contrib - directory. It was incorrect advice. - -Version 1.6.15beta07 [November 7, 2014] - Removed #ifdef PNG_16BIT_SUPPORTED/#endif around png_product2(); it is - needed by png_reciprocal2(). - Added #ifdef PNG_16BIT_SUPPORTED/#endif around png_log16bit() and - png_do_swap(). - Changed all "#endif /* PNG_FEATURE_SUPPORTED */" to "#endif /* FEATURE */" - -Version 1.6.15beta08 [November 8, 2014] - More housecleaning in *.h - -Version 1.6.15rc01 [November 13, 2014] - -Version 1.6.15rc02 [November 14, 2014] - The macros passed in the command line to Borland make were ignored if - similarly-named macros were already defined in makefiles. This behavior - is different from POSIX make and other make programs. Surround the - macro definitions with ifndef guards (Cosmin). - -Version 1.6.15rc03 [November 16, 2014] - Added "-D_CRT_SECURE_NO_WARNINGS" to CFLAGS in scripts/makefile.vcwin32. - Removed the obsolete $ARCH variable from scripts/makefile.darwin. - -Version 1.6.15 [November 20, 2014] - No changes. - -Version 1.6.16beta01 [December 14, 2014] - Added ".align 2" to arm/filter_neon.S to support old GAS assemblers that - don't do alignment correctly. - Revised Makefile.am and scripts/symbols.dfn to work with MinGW/MSYS - (Bob Friesenhahn). - -Version 1.6.16beta02 [December 15, 2014] - Revised Makefile.am and scripts/*.dfn again to work with MinGW/MSYS; - renamed scripts/*.dfn to scripts/*.c (John Bowler). - -Version 1.6.16beta03 [December 21, 2014] - Quiet a "comparison always true" warning in pngstest.c (John Bowler). - -Version 1.6.16rc01 [December 21, 2014] - Restored a test on width that was removed from png.c at libpng-1.6.9 - (Bug report by Alex Eubanks, CVE-2015-0973). - -Version 1.6.16rc02 [December 21, 2014] - Undid the update to pngrutil.c in 1.6.16rc01. - -Version 1.6.16rc03 [December 21, 2014] - Fixed an overflow in png_combine_row() with very wide interlaced images - (Bug report and fix by John Bowler, CVE-2014-9495). - -Version 1.6.16 [December 22, 2014] - No changes. - -Version 1.6.17beta01 [January 29, 2015] - Removed duplicate PNG_SAFE_LIMITS_SUPPORTED handling from pngconf.h - Corrected the width limit calculation in png_check_IHDR(). - Removed user limits from pngfix. Also pass NULL pointers to - png_read_row to skip the unnecessary row de-interlace stuff. - Added testing of png_set_packing() to pngvalid.c - Regenerated configure scripts in the *.tar distributions with libtool-2.4.4 - Implement previously untested cases of libpng transforms in pngvalid.c - Fixed byte order in png_do_read_filler() with 16-bit input. Previously - the high and low bytes of the filler, from png_set_filler() or from - png_set_add_alpha(), were read in the wrong order. - Made the check for out-of-range values in png_set_tRNS() detect - values that are exactly 2^bit_depth, and work on 16-bit platforms. - Merged some parts of libpng-1.6.17beta01 and libpng-1.7.0beta47. - Added #ifndef __COVERITY__ where needed in png.c, pngrutil.c and - pngset.c to avoid warnings about dead code. - Added "& 0xff" to many instances of expressions that are typecast - to (png_byte), to avoid Coverity warnings. - -Version 1.6.17beta02 [February 7, 2015] - Work around one more Coverity-scan dead-code warning. - Do not build png_product2() when it is unused. - -Version 1.6.17beta03 [February 17, 2015] - Display user limits in the output from pngtest. - Eliminated the PNG_SAFE_LIMITS macro and restored the 1-million-column - and 1-million-row default limits in pnglibconf.dfa, that can be reset - by the user at build time or run time. This provides a more robust - defense against DOS and as-yet undiscovered overflows. - -Version 1.6.17beta04 [February 21, 2015] - Added PNG_WRITE_CUSTOMIZE_COMPRESSION_SUPPORTED macro, on by default. - Allow user to call png_get_IHDR() with NULL arguments (Reuben Hawkins). - Rebuilt configure scripts with automake-1.15 and libtool-2.4.6 - -Version 1.6.17beta05 [February 25, 2015] - Restored compiling of png_reciprocal2 with PNG_NO_16BIT. - -Version 1.6.17beta06 [February 27, 2015] - Moved png_set_filter() prototype into a PNG_WRITE_SUPPORTED block - of png.h. - Avoid runtime checks when converting integer to png_byte with - Visual Studio (Sergey Kosarevsky) - -Version 1.6.17rc01 [March 4, 2015] - No changes. - -Version 1.6.17rc02 [March 9, 2015] - Removed some comments that the configure script did not handle - properly from scripts/pnglibconf.dfa and pnglibconf.h.prebuilt. - Free the unknown_chunks structure even when it contains no data. - -Version 1.6.17rc03 [March 12, 2015] - Updated CMakeLists.txt to add OSX framework, change YES/NO to ON/OFF - for consistency, and remove some useless tests (Alexey Petruchik). - -Version 1.6.17rc04 [March 16, 2015] - Remove pnglibconf.h, pnglibconf.c, and pnglibconf.out instead of - pnglibconf.* in "make clean" (Cosmin). - Fix bug in calculation of maxbits, in png_write_sBIT, introduced - in libpng-1.6.17beta01 (John Bowler). - -Version 1.6.17rc05 [March 21, 2015] - Define PNG_FILTER_* and PNG_FILTER_VALUE_* in png.h even when WRITE - is not supported (John Bowler). This fixes an error introduced in - libpng-1.6.17beta06. - Reverted "& 0xff" additions of version 1.6.17beta01. Libpng passes - the Coverity scan without them. - -Version 1.6.17rc06 [March 23, 2015] - Remove pnglibconf.dfn and pnglibconf.pre with "make clean". - Reformatted some "&0xff" instances to "& 0xff". - Fixed simplified 8-bit-linear to sRGB alpha. The calculated alpha - value was wrong. It's not clear if this affected the final stored - value; in the obvious code path the upper and lower 8-bits of the - alpha value were identical and the alpha was truncated to 8-bits - rather than dividing by 257 (John Bowler). - -Version 1.6.17 [March 26, 2015] - No changes. - -Version 1.6.18beta01 [April 1, 2015] - Removed PNG_SET_CHUNK_[CACHE|MALLOC]_LIMIT_SUPPORTED macros. They - have been combined with PNG_SET_USER_LIMITS_SUPPORTED (resolves - bug report by Andrew Church). - Fixed rgb_to_gray checks and added tRNS checks to pngvalid.c. This - fixes some arithmetic errors that caused some tests to fail on - some 32-bit platforms (Bug reports by Peter Breitenlohner [i686] - and Petr Gajdos [i586]). - -Version 1.6.18beta02 [April 26, 2015] - Suppressed some warnings from the Borland C++ 5.5.1/5.82 compiler - (Bug report by Viktor Szakats). - -Version 1.6.18beta03 [May 6, 2015] - Replaced "unexpected" with an integer (0xabadca11) in pngset.c - where a long was expected, to avoid a compiler warning when PNG_DEBUG > 1. - Added contrib/examples/simpleover.c, to demonstrate how to handle - alpha compositing of multiple images, using the "simplified API" - and an example PNG generation tool, contrib/examples/genpng.c - (John Bowler). - -Version 1.6.18beta04 [May 20, 2015] - PNG_RELEASE_BUILD replaces tests where the code depended on the build base - type and can be defined on the command line, allowing testing in beta - builds (John Bowler). - Avoid Coverity issue 80858 (REVERSE NULL) in pngtest.c PNG_DEBUG builds. - Avoid a harmless potential integer overflow in png_XYZ_from_xy() (Bug - report from Christopher Ferris). - -Version 1.6.18beta05 [May 31, 2015] - Backport filter selection code from libpng-1.7.0beta51, to combine - sub_row, up_row, avg_row, and paeth_row into try_row and tst_row. - Changed png_voidcast(), etc., to voidcast(), etc., in contrib/tools/pngfix.c - to avoid confusion with the libpng private macros. - Fixed old cut&paste bug in the weighted filter selection code in - pngwutil.c, introduced in libpng-0.95, March 1997. - -Version 1.6.18beta06 [June 1, 2015] - Removed WRITE_WEIGHTED_FILTERED code, to save a few kbytes of the - compiled library size. It never worked properly and as far as we can - tell, no one uses it. The png_set_filter_heuristics() and - png_set_filter_heuristics_fixed() APIs are retained but deprecated - and do nothing. - -Version 1.6.18beta07 [June 6, 2015] - Removed non-working progressive reader 'skip' function. This - function has apparently never been used. It was implemented - to support back-door modification of png_struct in libpng-1.4.x - but (because it does nothing and cannot do anything) was apparently - never tested (John Bowler). - Fixed cexcept.h in which GCC 5 now reports that one of the auto - variables in the Try macro needs to be volatile to prevent value - being lost over the setjmp (John Bowler). - Fixed NO_WRITE_FILTER and -Wconversion build breaks (John Bowler). - Fix g++ build breaks (John Bowler). - Quieted some Coverity issues in pngfix.c, png-fix-itxt.c, pngvalid.c, - pngstest.c, and pngimage.c. Most seem harmless, but png-fix-itxt - would only work with iTXt chunks with length 255 or less. - Added #ifdef's to contrib/examples programs so people don't try - to compile them without the minimum required support enabled - (suggested by Flavio Medeiros). - -Version 1.6.18beta08 [June 30, 2015] - Eliminated the final two Coverity defects (insecure temporary file - handling in contrib/libtests/pngstest.c; possible overflow of - unsigned char in contrib/tools/png-fix-itxt.c). To use the "secure" - file handling, define PNG_USE_MKSTEMP, otherwise "tmpfile()" will - be used. - Removed some unused WEIGHTED_FILTER macros from png.h and pngstruct.h - -Version 1.6.18beta09 [July 5, 2015] - Removed some useless typecasts from contrib/tools/png-fix-itxt.c - Fixed a new signed-unsigned comparison in pngrtran.c (Max Stepin). - Replaced arbitrary use of 'extern' with #define PNG_LINKAGE_*. To - preserve API compatibility, the new defines all default to "extern" - (requested by Jan Nijtmans). - -Version 1.6.18rc01 [July 9, 2015] - Belatedly added Mans Rullgard and James Yu to the list of Contributing - Authors. - -Version 1.6.18rc02 [July 12, 2015] - Restored unused FILTER_HEURISTIC macros removed at libpng-1.6.18beta08 - to png.h to avoid compatibility warnings. - -Version 1.6.18rc03 [July 15, 2015] - Minor changes to the man page - -Version 1.6.18 [July 23, 2015] - No changes. - -Version 1.6.19beta01 [July 30, 2015] - Updated obsolete information about the simplified API macros in the - manual pages (Bug report by Arc Riley). - Avoid potentially dereferencing NULL info_ptr in png_info_init_3(). - Rearranged png.h to put the major sections in the same order as - in libpng17. - Eliminated unused PNG_COST_SHIFT, PNG_WEIGHT_SHIFT, PNG_COST_FACTOR, and - PNG_WEIGHT_FACTOR macros. - Suppressed some warnings from the Borland C++ 5.5.1/5.82 compiler - (Bug report by Viktor Szakats). Several warnings remain and are - unavoidable, where we test for overflow. - Fixed potential leak of png_pixels in contrib/pngminus/pnm2png.c - Fixed uninitialized variable in contrib/gregbook/rpng2-x.c - -Version 1.6.19beta02 [August 19, 2015] - Moved config.h.in~ from the "libpng_autotools_files" list to the - "libpng_autotools_extra" list in autogen.sh because it was causing a - false positive for missing files (bug report by Robert C. Seacord). - Removed unreachable "break" statements in png.c, pngread.c, and pngrtran.c - to suppress clang warnings (Bug report by Viktor Szakats). - Fixed some bad links in the man page. - Changed "n bit" to "n-bit" in comments. - Added signed/unsigned 16-bit safety net. This removes the dubious - 0x8000 flag definitions on 16-bit systems. They aren't supported - yet the defs *probably* work, however it seems much safer to do this - and be advised if anyone, contrary to advice, is building libpng 1.6 - on a 16-bit system. It also adds back various switch default clauses - for GCC; GCC errors out if they are not present (with an appropriately - high level of warnings). - Safely convert num_bytes to a png_byte in png_set_sig_bytes() (Robert - Seacord). - Fixed the recently reported 1's complement security issue by replacing - the value that is illegal in the PNG spec, in both signed and unsigned - values, with 0. Illegal unsigned values (anything greater than or equal - to 0x80000000) can still pass through, but since these are not illegal - in ANSI-C (unlike 0x80000000 in the signed case) the checking that - occurs later can catch them (John Bowler). - -Version 1.6.19beta03 [September 26, 2015] - Fixed png_save_int_32 when int is not 2's complement (John Bowler). - Updated libpng16 with all the recent test changes from libpng17, - including changes to pngvalid.c to ensure that the original, - distributed, version of contrib/visupng/cexcept.h can be used - (John Bowler). - pngvalid contains the correction to the use of SAVE/STORE_ - UNKNOWN_CHUNKS; a bug revealed by changes in libpng 1.7. More - tests contain the --strict option to detect warnings and the - pngvalid-standard test has been corrected so that it does not - turn on progressive-read. There is a separate test which does - that. (John Bowler) - Also made some signed/unsigned fixes. - Make pngstest error limits version specific. Splitting the machine - generated error structs out to a file allows the values to be updated - without changing pngstest.c itself. Since libpng 1.6 and 1.7 have - slightly different error limits this simplifies maintenance. The - makepngs.sh script has also been updated to more accurately reflect - current problems in libpng 1.7 (John Bowler). - Incorporated new test PNG files into make check. tests/pngstest-* - are changed so that the new test files are divided into 8 groups by - gamma and alpha channel. These tests have considerably better code - and pixel-value coverage than contrib/pngsuite; however,coverage is - still incomplete (John Bowler). - Removed the '--strict' in 1.6 because of the double-gamma-correction - warning, updated pngstest-errors.h for the errors detected with the - new contrib/testspngs PNG test files (John Bowler). - -Version 1.6.19beta04 [October 15, 2015] - Worked around rgb-to-gray issues in libpng 1.6. The previous - attempts to ignore the errors in the code aren't quite enough to - deal with the 'channel selection' encoding added to libpng 1.7; abort. - pngvalid.c is changed to drop this encoding in prior versions. - Fixed 'pow' macros in pngvalid.c. It is legal for 'pow' to be a - macro, therefore the argument list cannot contain preprocessing - directives. Make sure pow is a function where this happens. This is - a minimal safe fix, the issue only arises in non-performance-critical - code (bug report by Curtis Leach, fix by John Bowler). - Added sPLT support to pngtest.c - -Version 1.6.19rc01 [October 23, 2015] - No changes. - -Version 1.6.19rc02 [October 31, 2015] - Prevent setting or writing over-length PLTE chunk (Cosmin Truta). - Silently truncate over-length PLTE chunk while reading. - Libpng incorrectly calculated the output rowbytes when the application - decreased either the number of channels or the bit depth (or both) in - a user transform. This was safe; libpng overallocated buffer space - (potentially by quite a lot; up to 4 times the amount required) but, - from 1.5.4 on, resulted in a png_error (John Bowler). - -Version 1.6.19rc03 [November 3, 2015] - Fixed some inconsequential cut-and-paste typos in png_set_cHRM_XYZ_fixed(). - Clarified COPYRIGHT information to state explicitly that versions - are derived from previous versions. - Removed much of the long list of previous versions from png.h and - libpng.3. - -Version 1.6.19rc04 [November 5, 2015] - Fixed new bug with CRC error after reading an over-length palette - (bug report by Cosmin Truta) (CVE-2015-8126). - -Version 1.6.19 [November 12, 2015] - Cleaned up coding style in png_handle_PLTE(). - -Version 1.6.20beta01 [November 20, 2015] - Avoid potential pointer overflow/underflow in png_handle_sPLT() and - png_handle_pCAL() (Bug report by John Regehr). - -Version 1.6.20beta02 [November 23, 2015] - Fixed incorrect implementation of png_set_PLTE() that uses png_ptr - not info_ptr, that left png_set_PLTE() open to the CVE-2015-8126 - vulnerability. Fixes CVE-2015-8472. - -Version 1.6.20beta03 [November 24, 2015] - Backported tests from libpng-1.7.0beta69. - -Version 1.6.20rc01 [November 26, 2015] - Fixed an error in handling of bad zlib CMINFO field in pngfix, found by - American Fuzzy Lop, reported by Brian Carpenter. inflate() doesn't - immediately fault a bad CMINFO field; instead a 'too far back' error - happens later (at least some times). pngfix failed to limit CMINFO to - the allowed values but then assumed that window_bits was in range, - triggering an assert. The bug is mostly harmless; the PNG file cannot - be fixed. - -Version 1.6.20rc02 [November 29, 2015] - In libpng 1.6 zlib initialization was changed to use the window size - in the zlib stream, not a fixed value. This causes some invalid images, - where CINFO is too large, to display 'correctly' if the rest of the - data is valid. This provides a workaround for zlib versions where the - error arises (ones that support the API change to use the window size - in the stream). - -Version 1.6.20 [December 3, 2015] - No changes. - -Version 1.6.21beta01 [December 11, 2015] - Fixed syntax "$(command)" in tests/pngstest that some shells other than - bash could not parse (Bug report by Nelson Beebe). Use `command` instead. - -Version 1.6.21beta02 [December 14, 2015] - Moved png_check_keyword() from pngwutil.c to pngset.c - Removed LE/BE dependencies in pngvalid, to 'fix' the current problem - in the BigEndian tests by not testing it, making the BE code the same - as the LE version. - Fixes to pngvalid for various reduced build configurations (eliminate unused - statics) and a fix for the case in rgb_to_gray when the digitize option - reduces graylo to 0, producing a large error. - -Version 1.6.21beta03 [December 18, 2015] - Widened the 'limit' check on the internally calculated error limits in - the 'DIGITIZE' case (the code used prior to 1.7 for rgb_to_gray error - checks) and changed the check to only operate in non-release builds - (base build type not RC or RELEASE.) - Fixed undefined behavior in pngvalid.c, undefined because - (png_byte) << shift is undefined if it changes the signed bit - (because png_byte is promoted to int). The libpng exported functions - png_get_uint_32 and png_get_uint_16 handle this. (Bug reported by - David Drysdale as a result of reports from UBSAN in clang 3.8). - This changes pngvalid to use BE random numbers; this used to produce - errors but these should not be fixed as a result of the previous changes. - -Version 1.6.21rc01 [January 4, 2016] - In projects/vstudio, combined readme.txt and WARNING into README.txt - -Version 1.6.21rc02 [January 7, 2016] - Relocated assert() in contrib/tools/pngfix.c, bug found by American - Fuzzy Lop, reported by Brian Carpenter. - Marked 'limit' UNUSED in transform_range_check(). This only affects - release builds. - -Version 1.6.21 [January 15, 2016] - Worked around a false-positive Coverity issue in pngvalid.c. - -Version 1.6.22beta01 [January 23, 2016] - Changed PNG_USE_MKSTEMP to __COVERITY__ to select alternate - "tmpfile()" implementation in contrib/libtests/pngstest.c - Fixed NO_STDIO build of pngunknown.c to skip calling png_init_io() - if there is no stdio.h support. - Added a png_image_write_to_memory() API and a number of assist macros - to allow an application that uses the simplified API write to bypass - stdio and write directly to memory. - Added some warnings (png.h) and some check code to detect *possible* - overflow in the ROW_STRIDE and simplified image SIZE macros. This - disallows image width/height/format that *might* overflow. This is - a quiet API change that limits in-memory image size (uncompressed) to - less than 4GByte and image row size (stride) to less than 2GByte. - Revised workaround for false-positive Coverity issue in pngvalid.c. - -Version 1.6.22beta02 [February 8, 2016] - Only use exit(77) in configure builds. - Corrected error in PNG_IMAGE_PNG_SIZE_MAX. This new macro underreported - the palette size because it failed to take into account that the memory - palette has to be expanded to full RGB when it is written to PNG. - Updated CMakeLists.txt, added supporting scripts/gen*.cmake.in - and test.cmake.in (Roger Leigh). - Relaxed limit checks on gamma values in pngrtran.c. As suggested in - the comments gamma values outside the range currently permitted - by png_set_alpha_mode are useful for HDR data encoding. These values - are already permitted by png_set_gamma so it is reasonable caution to - extend the png_set_alpha_mode range as HDR imaging systems are starting - to emerge. - -Version 1.6.22beta03 [March 9, 2016] - Added a common-law trademark notice and export control information - to the LICENSE file, png.h, and the man page. - Restored "& 0xff" in png_save_uint_16() and png_save_uint_32() that - were accidentally removed from libpng-1.6.17. - Changed PNG_INFO_cHNK and PNG_FREE_cHNK from 0xnnnn to 0xnnnnU in png.h - (Robert C. Seacord). - Removed dubious "#if INT_MAX" test from png.h that was added to - libpng-1.6.19beta02 (John Bowler). - Add ${INCLUDES} in scripts/genout.cmake.in (Bug report by Nixon Kwok). - Updated LICENSE to say files in the contrib directory are not - necessarily under the libpng license, and that some makefiles have - other copyright owners. - Added INTEL-SSE2 support (Mike Klein and Matt Sarett, Google, Inc.). - Made contrib/libtests/timepng more robust. The code no longer gives - up/fails on invalid PNG data, it just skips it (with error messages). - The code no longer fails on PNG files with data beyond IEND. Options - exist to use png_read_png (reading the whole image, not by row) and, in - that case, to apply any of the supported transforms. This makes for - more realistic testing; the decoded data actually gets used in a - meaningful fashion (John Bowler). - Fixed some misleading indentation (Krishnaraj Bhat). - -Version 1.6.22beta04 [April 5, 2016] - Force GCC compilation to C89 if needed (Dagobert Michelsen). - SSE filter speed improvements for bpp=3: - memcpy-free implementations of load3() / store3(). - call load3() only when needed at the end of a scanline. - -Version 1.6.22beta05 [April 27, 2016] - Added PNG_FAST_FILTERS macro (defined as - PNG_FILTER_NONE|PNG_FILTER_SUB|PNG_FILTER_UP). - Various fixes for contrib/libtests/timepng.c - Moved INTEL-SSE code from pngpriv.h into contrib/intel/intel_sse.patch. - Fixed typo (missing underscore) in #define PNG_READ_16_TO_8_SUPPORTED - (Bug report by Y.Ohashik). - -Version 1.6.22beta06 [May 5, 2016] - Rebased contrib/intel_sse.patch. - Quieted two Coverity issues in contrib/libtests/timepng.c. - Fixed issues with scripts/genout.cmake.in (David Capello, Nixon Kwok): - Added support to use multiple directories in ZLIBINCDIR variable, - Fixed CMAKE_C_FLAGS with multiple values when genout is compiled on MSVC, - Fixed pnglibconf.c compilation on OS X including the sysroot path. - -Version 1.6.22rc01 [May 14, 2016] - No changes. - -Version 1.6.22rc02 [May 16, 2016] - Removed contrib/timepng from default build; it does not build on platforms - that don't supply clock_gettime(). - -Version 1.6.22rc03 [May 17, 2016] - Restored contrib/timepng to default build but check for the presence - of clock_gettime() in configure.ac and Makefile.am. - -Version 1.6.22 [May 26, 2016] - No changes. - -Version 1.6.23beta01 [May 29, 2016] - Stop a potential memory leak in png_set_tRNS() (Bug report by Ted Ying). - Fixed the progressive reader to handle empty first IDAT chunk properly - (patch by Timothy Nikkel). This bug was introduced in libpng-1.6.0 and - only affected the libpng16 branch. - Added tests in pngvalid.c to check zero-length IDAT chunks in various - positions. Fixed the sequential reader to handle these more robustly - (John Bowler). - -Version 1.6.23rc01 [June 2, 2016] - Corrected progressive read input buffer in pngvalid.c. The previous version - the code invariably passed just one byte at a time to libpng. The intent - was to pass a random number of bytes in the range 0..511. - Moved sse2 prototype from pngpriv.h to contrib/intel/intel_sse.patch. - Added missing ")" in pngerror.c (Matt Sarrett). - -Version 1.6.23rc02 [June 4, 2016] - Fixed undefined behavior in png_push_save_buffer(). Do not call - memcpy() with a null source, even if count is zero (Leon Scroggins III). - -Version 1.6.23 [June 9, 2016] - Fixed bad link to RFC2083 in png.5 (Nikola Forro). - -Version 1.6.24beta01 [June 11, 2016] - Avoid potential overflow of the PNG_IMAGE_SIZE macro. This macro - is not used within libpng, but is used in some of the examples. - -Version 1.6.24beta02 [June 23, 2016] - Correct filter heuristic overflow handling. This was broken when the - write filter code was moved out-of-line; if there is a single filter and - the heuristic sum overflows the calculation of the filtered line is not - completed. In versions prior to 1.6 the code was duplicated in-line - and the check not performed, so the filter operation completed; however, - in the multi-filter case where the sum is performed the 'none' filter would - be selected if all the sums overflowed, even if it wasn't in the filter - list. The fix to the first problem is simply to provide PNG_SIZE_MAX as - the current lmins sum value; this means the sum can never exceed it and - overflows silently. A reasonable compiler that does choose to inline - the code will simply eliminate the sum check. - The fix to the second problem is to use high precision arithmetic (this is - implemented in 1.7), however a simple safe fix here is to chose the lowest - numbered filter in the list from png_set_filter (this only works if the - first problem is also fixed) (John Bowler). - Use a more efficient absolute value calculation on SSE2 (Matthieu Darbois). - Fixed the case where PNG_IMAGE_BUFFER_SIZE can overflow in the application - as a result of the application using an increased 'row_stride'; previously - png_image_finish_read only checked for overflow on the base calculation of - components. (I.e. it checked for overflow of a 32-bit number on the total - number of pixel components in the output format, not the possibly padded row - length and not the number of bytes, which for linear formats is twice the - number of components.) - MSVC does not like '-(unsigned)', so replaced it with 0U-(unsigned) - MSVC does not like (uInt) = -(unsigned) (i.e. as an initializer), unless - the conversion is explicitly invoked by a cast. - Put the SKIP definition in the correct place. It needs to come after the - png.h include (see all the other .c files in contrib/libtests) because it - depends on PNG_LIBPNG_VER. - Removed the three compile warning options from the individual project - files into the zlib.props globals. It increases the warning level from 4 - to All and adds a list of the warnings that need to be turned off. This is - semi-documentary; the intent is to tell libpng users which warnings have - been examined and judged non-fixable at present. The warning about - structure padding is fixable, but it would be a significant change (moving - structure members around). - -Version 1.6.24beta03 [July 4, 2016] - Optimized absolute value calculation in filter selection, similar to - code in the PAETH decoder in pngrutil.c. Build with PNG_USE_ABS to - use this. - Added pngcp to the build together with a pngcp.dfa configuration test. - Added high resolution timing to pngcp. - Added "Common linking failures" section to INSTALL. - Relocated misplaced #endif in png.c sRGB profile checking. - Fixed two Coverity issues in pngcp.c. - -Version 1.6.24beta04 [July 8, 2016] - Avoid filter-selection heuristic sum calculations in cases where only one - filter is a candidate for selection. This trades off code size (added - private png_setup_*_row_only() functions) for speed. - -Version 1.6.24beta05 [July 13, 2016] - Fixed some indentation to comply with our coding style. - Added contrib/tools/reindent. - -Version 1.6.24beta06 [July 18, 2016] - Fixed more indentation to comply with our coding style. - Eliminated unnecessary tests of boolean png_isaligned() vs 0. - -Version 1.6.24rc01 [July 25, 2016] - No changes. - -Version 1.6.24rc02 [August 1, 2016] - Conditionally compile SSE2 headers in contrib/intel/intel_sse.patch - Conditionally compile png_decompress_chunk(). - -Version 1.6.24rc03 [August 2, 2016] - Conditionally compile ARM_NEON headers in pngpriv.h - Updated contrib/intel/intel_sse.patch - -Version 1.6.24[August 4, 2016] - No changes. - -Version 1.6.25beta01 [August 12, 2016] - Reject oversized iCCP profile immediately. - Cleaned up PNG_DEBUG compile of pngtest.c. - Conditionally compile png_inflate(). - -Version 1.6.25beta02 [August 18, 2016] - Don't install pngcp; it conflicts with pngcp in the pngtools package. - Minor editing of INSTALL, (whitespace, added copyright line) - -Version 1.6.25rc01 [August 24, 2016] - No changes. - -Version 1.6.25rc02 [August 29, 2016] - Added MIPS support (Mandar Sahastrabuddhe ). - Only the UP filter is currently implemented. - -Version 1.6.25rc03 [August 29, 2016] - Rebased contrib/intel/intel_sse.patch after the MIPS implementation. - -Version 1.6.25rc04 [August 30, 2016] - Added MIPS support for SUB, AVG, and PAETH filters (Mandar Sahastrabuddhe). - -Version 1.6.25rc05 [August 30, 2016] - Rebased contrib/intel/intel_sse.patch after the MIPS implementation update.. - -Version 1.6.25 [September 1, 2016] - No changes. - -Version 1.6.26beta01 [September 26, 2016] - Fixed handling zero length IDAT in pngfix (bug report by Agostino Sarubbo, - bugfix by John Bowler). - Do not issue a png_error() on read in png_set_pCAL() because png_handle_pCAL - has allocated memory that libpng needs to free. - Conditionally compile png_set_benign_errors() in pngread.c and pngtest.c - Issue a png_benign_error instead of a png_error on ADLER32 mismatch - while decoding compressed data chunks. - Changed PNG_ZLIB_VERNUM to ZLIB_VERNUM in pngpriv.h, pngstruct.h, and - pngrutil.c. - If CRC handling of critical chunks has been set to PNG_CRC_QUIET_USE, - ignore the ADLER32 checksum in the IDAT chunk as well as the chunk CRCs. - Issue png_benign_error() on ADLER32 checksum mismatch instead of png_error(). - Add tests/badcrc.png and tests/badadler.png to tests/pngtest. - Merged pngtest.c with libpng-1.7.0beta84/pngtest.c - -Version 1.6.26beta02 [October 1, 2016] - Updated the documentation about CRC and ADLER32 handling. - Quieted 117 warnings from clang-3.8 in pngtrans.c, pngread.c, - pngwrite.c, pngunknown.c, and pngvalid.c. - Quieted 58 (out of 144) -Wconversion compiler warnings by changing - flag definitions in pngpriv.h from 0xnnnn to 0xnnnnU and trivial changes - in png.c, pngread.c, and pngwutil.c. - -Version 1.6.26beta03 [October 2, 2016] - Removed contrib/libtests/*.orig and *.rej that slipped into the tarballs. - Quieted the 86 remaining -Wconversion compiler warnings by - revising the png_isaligned() macro and trivial changes in png.c, - pngerror.c, pngget.c, pngmem.c, pngset.c, pngrtran.c, pngrutil.c, - pngwtran.c, pngwrite.c, and pngwutil.c. - -Version 1.6.26beta04 [October 3, 2016] - Quieted (bogus?) clang warnings about "absolute value has no effect" - when PNG_USE_ABS is defined. - Fixed offsets in contrib/intel/intel_sse.patch - -Version 1.6.26beta05 [October 6, 2016] - Changed integer constant 4294967294 to unsigned 4294967294U in pngconf.h - to avoid a signed/unsigned compare in the preprocessor. - -Version 1.6.26beta06 [October 7, 2016] - Use zlib-1.2.8.1 inflateValidate() instead of inflateReset2() to - optionally avoid ADLER32 evaluation. - -Version 1.6.26rc01 [October 12, 2016] - No changes. - -Version 1.6.26 [October 20, 2016] - Cosmetic change, "ptr != 0" to "ptr != NULL" in png.c and pngrutil.c - Despammed email addresses (replaced "@" with " at "). - -Version 1.6.27beta01 [November 2, 2016] - Restrict the new ADLER32-skipping to IDAT chunks. It broke iCCP chunk - handling: an erroneous iCCP chunk would throw a png_error and reject the - entire PNG image instead of rejecting just the iCCP chunk with a warning, - if built with zlib-1.2.8.1. - -Version 1.6.27rc01 [December 27, 2016] - Control ADLER32 checking with new PNG_IGNORE_ADLER32 option. Fixes - an endless loop when handling erroneous ADLER32 checksums; bug - introduced in libpng-1.6.26. - Removed the use of a macro containing the pre-processor 'defined' - operator. It is unclear whether this is valid; a macro that - "generates" 'defined' is not permitted, but the use of the word - "generates" within the C90 standard seems to imply more than simple - substitution of an expression itself containing a well-formed defined - operation. - Added ARM support to CMakeLists.txt (Andreas Franek). - -Version 1.6.27 [December 29, 2016] - Fixed a potential null pointer dereference in png_set_text_2() (bug report - and patch by Patrick Keshishian, CVE-2016-10087). - -Version 1.6.28rc01 [January 3, 2017] - Fixed arm/aarch64 detection in CMakeLists.txt (Gianfranco Costamagna). - Added option to Cmake build allowing a custom location of zlib to be - specified in a scenario where libpng is being built as a subproject - alongside zlib by another project (Sam Serrels). - Changed png_ptr->options from a png_byte to png_uint_32, to accommodate - up to 16 options. - -Version 1.6.28rc02 [January 4, 2017] - Added "include(GNUInstallDirs)" to CMakeLists.txt (Gianfranco Costamagna). - Moved SSE2 optimization code into the main libpng source directory. - Configure libpng with "configure --enable-intel-sse" or compile - libpng with "-DPNG_INTEL_SSE" in CPPFLAGS to enable it. - -Version 1.6.28rc03 [January 4, 2017] - Backed out the SSE optimization and last CMakeLists.txt to allow time for QA. - -Version 1.6.28 [January 5, 2017] - No changes. - -Version 1.6.29beta01 [January 12, 2017] - Readded "include(GNUInstallDirs)" to CMakeLists.txt (Gianfranco Costamagna). - Moved SSE2 optimization code into the main libpng source directory. - Configure libpng with "configure --enable-intel-sse" or compile - libpng with "-DPNG_INTEL_SSE" in CPPFLAGS to enable it. - Simplified conditional compilation in pngvalid.c, for AIX (Michael Felt). - -Version 1.6.29beta02 [February 22, 2017] - Avoid conditional directives that break statements in pngrutil.c (Romero - Malaquias) - The contrib/examples/pngtopng.c recovery code was in the wrong "if" - branches; the comments were correct. - Added code for PowerPC VSX optimisation (Vadim Barkov). - -Version 1.6.29beta03 [March 1, 2017] - Avoid potential overflow of shift operations in png_do_expand() (Aaron Boxer). - Change test ZLIB_VERNUM >= 0x1281 to ZLIB_VERNUM >= 0x1290 in pngrutil.c - because Solaris 11 distributes zlib-1.2.8.f that is older than 1.2.8.1, - as suggested in zlib FAQ, item 24. - Suppress clang warnings about implicit sign changes in png.c - -Version 1.6.29 [March 16, 2017] - No changes. - -Version 1.6.30beta01 [April 1, 2017] - Added missing "$(CPPFLAGS)" to the compile line for c.pic.o in - makefile.linux and makefile.solaris-x86 (Cosmin). - Revised documentation of png_get_error_ptr() in the libpng manual. - Silence clang -Wcomma and const drop warnings (Viktor Szakats). - Update Sourceforge URLs in documentation (https instead of http). - -Version 1.6.30beta02 [April 22, 2017] - Document need to check for integer overflow when allocating a pixel - buffer for multiple rows in contrib/gregbook, contrib/pngminus, - example.c, and in the manual (suggested by Jaeseung Choi). This - is similar to the bug reported against pngquant in CVE-2016-5735. - Removed reference to the obsolete PNG_SAFE_LIMITS macro in the documentation. - -Version 1.6.30beta03 [May 22, 2017] - Check for integer overflow in contrib/visupng and contrib/tools/genpng. - Do not double evaluate CMAKE_SYSTEM_PROCESSOR in CMakeLists.txt. - Test CMAKE_HOST_WIN32 instead of WIN32 in CMakeLists.txt. - Fix some URL in documentation. - -Version 1.6.30beta04 [June 7, 2017] - Avoid writing an empty IDAT when the last IDAT exactly fills the - compression buffer (bug report by Brian Baird). This bug was - introduced in libpng-1.6.0. - -Version 1.6.30rc01 [June 14, 2017] - No changes. - -Version 1.6.30rc02 [June 25, 2017] - Update copyright year in pnglibconf.h, make ltmain.sh executable. - Add a reference to the libpng.download site in README. - -Version 1.6.30 [June 28, 2017] - No changes. - -Version 1.6.31beta01 [July 5, 2017] - Guard the definition of _POSIX_SOURCE in pngpriv.h (AIX already defines it; - bug report by Michael Felt). - Revised pngpriv.h to work around failure to compile arm/filter_neon.S - ("typedef" directive is unrecognized by the assembler). The problem - was introduced in libpng-1.6.30beta01. - Added "Requires: zlib" to libpng.pc.in (Pieter Neerincx). - Added special case for FreeBSD in arm/filter_neon.S (Maya Rashish). - -Version 1.6.31beta02 [July 8, 2017] - Added instructions for disabling hardware optimizations in INSTALL. - Added "--enable-hardware-optimizations" configuration flag to enable - or disable all hardware optimizations with one flag. - -Version 1.6.31beta03 [July 9, 2017] - Updated CMakeLists.txt to add INTEL_SSE and MIPS_MSA platforms. - Changed "int" to "png_size_t" in intel/filter_sse2.c to prevent - possible integer overflow (Bug report by John Bowler). - Quieted "declaration after statement" warnings in intel/filter_sse2.c. - Added scripts/makefile-linux-opt, which has hardware optimizations enabled. - -Version 1.6.31beta04 [July 11, 2017] - Removed one of the GCC-7.1.0 'strict-overflow' warnings that result when - integers appear on both sides of a compare. Worked around the others by - forcing the strict-overflow setting in the relevant functions to a level - where they are not reported (John Bowler). - Changed "FALL THROUGH" comments to "FALLTHROUGH" because GCC doesn't like - the space. - Worked around some C-style casts from (void*) because g++ 5.4.0 objects - to them. - Increased the buffer size for 'sprint' to pass the gcc 7.1.0 'sprint - overflow' check that is on by default with -Wall -Wextra. - -Version 1.6.31beta05 [July 13, 2017] - Added eXIf chunk support. - -Version 1.6.31beta06 [July 17, 2017] - Added a minimal eXIf chunk (with Orientation and FocalLengthIn35mmFilm - tags) to pngtest.png. - -Version 1.6.31beta07 [July 18, 2017] - Revised the eXIf chunk in pngtest.png to fix "Bad IFD1 Directory" warning. - -Version 1.6.31rc01 [July 19, 2017] - No changes. - -Version 1.6.31rc02 [July 25, 2017] - Fixed typo in example.c (png_free_image should be png_image_free) (Bug - report by John Smith) - -Version 1.6.31 [July 27, 2017] - No changes. - -Version 1.6.32beta01 [July 31, 2017] - Avoid possible NULL dereference in png_handle_eXIf when benign_errors - are allowed. Avoid leaking the input buffer "eXIf_buf". - Eliminated png_ptr->num_exif member from pngstruct.h and added num_exif - to arguments for png_get_eXIf() and png_set_eXIf(). - Added calls to png_handle_eXIf(() in pngread.c and png_write_eXIf() in - pngwrite.c, and made various other fixes to png_write_eXIf(). - Changed name of png_get_eXIF and png_set_eXIf() to png_get_eXIf_1() and - png_set_eXIf_1(), respectively, to avoid breaking API compatibility - with libpng-1.6.31. - -Version 1.6.32beta02 [August 1, 2017] - Updated contrib/libtests/pngunknown.c with eXIf chunk. - -Version 1.6.32beta03 [August 2, 2017] - Initialized btoa[] in pngstest.c - Stop memory leak when returning from png_handle_eXIf() with an error - (Bug report from the OSS-fuzz project). - -Version 1.6.32beta04 [August 2, 2017] - Replaced local eXIf_buf with info_ptr-eXIf_buf in png_handle_eXIf(). - Update libpng.3 and libpng-manual.txt about eXIf functions. - -Version 1.6.32beta05 [August 2, 2017] - Restored png_get_eXIf() and png_set_eXIf() to maintain API compatibility. - -Version 1.6.32beta06 [August 2, 2017] - Removed png_get_eXIf_1() and png_set_eXIf_1(). - -Version 1.6.32beta07 [August 3, 2017] - Check length of all chunks except IDAT against user limit to fix an - OSS-fuzz issue (Fixes CVE-2017-12652). - -Version 1.6.32beta08 [August 3, 2017] - Check length of IDAT against maximum possible IDAT size, accounting - for height, rowbytes, interlacing and zlib/deflate overhead. - Restored png_get_eXIf_1() and png_set_eXIf_1(), because strlen(eXIf_buf) - does not work (the eXIf chunk data can contain zeroes). - -Version 1.6.32beta09 [August 3, 2017] - Require cmake-2.8.8 in CMakeLists.txt. Revised symlink creation, - no longer using deprecated cmake LOCATION feature (Clifford Yapp). - Fixed five-byte error in the calculation of IDAT maximum possible size. - -Version 1.6.32beta10 [August 5, 2017] - Moved chunk-length check into a png_check_chunk_length() private - function (Suggested by Max Stepin). - Moved bad pngs from tests to contrib/libtests/crashers - Moved testing of bad pngs into a separate tests/pngtest-badpngs script - Added the --xfail (expected FAIL) option to pngtest.c. It writes XFAIL - in the output but PASS for the libpng test. - Require cmake-3.0.2 in CMakeLists.txt (Clifford Yapp). - Fix "const" declaration info_ptr argument to png_get_eXIf_1() and the - num_exif argument to png_get_eXIf_1() (Github Issue 171). - -Version 1.6.32beta11 [August 7, 2017] - Added "eXIf" to "chunks_to_ignore[]" in png_set_keep_unknown_chunks(). - Added huge_IDAT.png and empty_ancillary_chunks.png to testpngs/crashers. - Make pngtest --strict, --relax, --xfail options imply -m (multiple). - Removed unused chunk_name parameter from png_check_chunk_length(). - Relocated setting free_me for eXIf data, to stop an OSS-fuzz leak. - Initialize profile_header[] in png_handle_iCCP() to fix OSS-fuzz issue. - Initialize png_ptr->row_buf[0] to 255 in png_read_row() to fix OSS-fuzz UMR. - Attempt to fix a UMR in png_set_text_2() to fix OSS-fuzz issue. - Increase minimum zlib stream from 9 to 14 in png_handle_iCCP(), to account - for the minimum 'deflate' stream, and relocate the test to a point - after the keyword has been read. - Check that the eXIf chunk has at least 2 bytes and begins with "II" or "MM". - -Version 1.6.32rc01 [August 18, 2017] - Added a set of "huge_xxxx_chunk.png" files to contrib/testpngs/crashers, - one for each known chunk type, with length = 2GB-1. - Check for 0 return from png_get_rowbytes() and added some (size_t) typecasts - in contrib/pngminus/*.c to stop some Coverity issues (162705, 162706, - and 162707). - Renamed chunks in contrib/testpngs/crashers to avoid having files whose - names differ only in case; this causes problems with some platforms - (github issue #172). - -Version 1.6.32rc02 [August 22, 2017] - Added contrib/oss-fuzz directory which contains files used by the oss-fuzz - project (https://github.com/google/oss-fuzz/tree/master/projects/libpng). - -Version 1.6.32 [August 24, 2017] - No changes. - -Version 1.6.33beta01 [August 28, 2017] - Added PNGMINUS_UNUSED macro to contrib/pngminus/p*.c and added missing - parenthesis in contrib/pngminus/pnm2png.c (bug report by Christian Hesse). - Fixed off-by-one error in png_do_check_palette_indexes() (Bug report - by Mick P., Source Forge Issue #269). - -Version 1.6.33beta02 [September 3, 2017] - Initialize png_handler.row_ptr in contrib/oss-fuzz/libpng_read_fuzzer.cc - to fix shortlived oss-fuzz issue 3234. - Compute a larger limit on IDAT because some applications write a deflate - buffer for each row (Bug report by Andrew Church). - Use current date (DATE) instead of release-date (RDATE) in last - changed date of contrib/oss-fuzz files. - Enabled ARM support in CMakeLists.txt (Bernd Kuhls). - -Version 1.6.33beta03 [September 14, 2017] - Fixed incorrect typecast of some arguments to png_malloc() and - png_calloc() that were png_uint_32 instead of png_alloc_size_t - (Bug report by "irwir" in Github libpng issue #175). - Use pnglibconf.h.prebuilt when building for ANDROID with cmake (Github - issue 162, by rcdailey). - -Version 1.6.33rc01 [September 20, 2017] - Initialize memory allocated by png_inflate to zero, using memset, to - stop an oss-fuzz "use of uninitialized value" detection in png_set_text_2() - due to truncated iTXt or zTXt chunk. - Initialize memory allocated by png_read_buffer to zero, using memset, to - stop an oss-fuzz "use of uninitialized value" detection in - png_icc_check_tag_table() due to truncated iCCP chunk. - Removed a redundant test (suggested by "irwir" in Github issue #180). - -Version 1.6.33rc02 [September 23, 2017] - Added an interlaced version of each file in contrib/pngsuite. - Relocate new memset() call in pngrutil.c. - Removed more redundant tests (suggested by "irwir" in Github issue #180). - Add support for loading images with associated alpha in the Simplified - API (Samuel Williams). - -Version 1.6.33 [September 28, 2017] - Revert contrib/oss-fuzz/libpng_read_fuzzer.cc to libpng-1.6.32 state. - Initialize png_handler.row_ptr in contrib/oss-fuzz/libpng_read_fuzzer.cc - Add end_info structure and png_read_end() to the libpng fuzzer. - -Version 1.6.34 [September 29, 2017] - Removed contrib/pngsuite/i*.png; some of them caused test failures. - -Version 1.6.35beta01 [March 6, 2018] - Restored 21 of the contrib/pngsuite/i*.png, which do not cause test - failures. Placed the remainder in contrib/pngsuite/interlaced/i*.png. - Added calls to png_set_*() transforms commonly used by browsers to - the fuzzer. - Removed some unnecessary brackets in pngrtran.c - Fixed miscellaneous typos (Patch by github user "luzpaz"). - Change "ASM C" to "C ASM" in CMakeLists.txt - Fixed incorrect handling of bKGD chunk in sub-8-bit files (Cosmin) - Added hardware optimization directories to zip and 7z distributions. - Fixed incorrect bitmask for options. - Fixed many spelling typos. - -Version 1.6.35beta02 [March 28, 2018] - Make png_get_iCCP consistent with man page (allow compression-type argument - to be NULL, bug report by Lenard Szolnoki). - -Version 1.6.35 [July 15, 2018] - Replaced the remaining uses of png_size_t with size_t (Cosmin) - Fixed the calculation of row_factor in png_check_chunk_length - (reported by Thuan Pham in SourceForge issue #278) - Added missing parentheses to a macro definition - (suggested by "irwir" in GitHub issue #216) - -Version 1.6.36 [December 1, 2018] - Optimized png_do_expand_palette for ARM processors. - Improved performance by around 10-22% on a recent ARM Chromebook. - (Contributed by Richard Townsend, ARM Holdings) - Fixed manipulation of machine-specific optimization options. - (Contributed by Vicki Pfau) - Used memcpy instead of manual pointer arithmetic on Intel SSE2. - (Contributed by Samuel Williams) - Fixed build errors with MSVC on ARM64. - (Contributed by Zhijie Liang) - Fixed detection of libm in CMakeLists. - (Contributed by Cameron Cawley) - Fixed incorrect creation of pkg-config file in CMakeLists. - (Contributed by Kyle Bentley) - Fixed the CMake build on Windows MSYS by avoiding symlinks. - Fixed a build warning on OpenBSD. - (Contributed by Theo Buehler) - Fixed various typos in comments. - (Contributed by "luz.paz") - Raised the minimum required CMake version from 3.0.2 to 3.1. - Removed yet more of the vestigial support for pre-ANSI C compilers. - Removed ancient makefiles for ancient systems that have been broken - across all previous libpng-1.6.x versions. - Removed the Y2K compliance statement and the export control - information. - Applied various code style and documentation fixes. - -Version 1.6.37 [April 14, 2019] - Fixed a use-after-free vulnerability (CVE-2019-7317) in png_image_free. - Fixed a memory leak in the ARM NEON implementation of png_do_expand_palette. - Fixed a memory leak in pngtest.c. - Fixed two vulnerabilities (CVE-2018-14048, CVE-2018-14550) in - contrib/pngminus; refactor. - Changed the license of contrib/pngminus to MIT; refresh makefile and docs. - (Contributed by Willem van Schaik) - Fixed a typo in the libpng license v2. - (Contributed by Miguel Ojeda) - Added makefiles for AddressSanitizer-enabled builds. - Cleaned up various makefiles. - -Send comments/corrections/commendations to png-mng-implement at lists.sf.net. -Subscription is required; visit -https://lists.sourceforge.net/lists/listinfo/png-mng-implement -to subscribe. diff --git a/lib/libpng-1.6.37/CMakeLists.txt b/lib/libpng-1.6.37/CMakeLists.txt deleted file mode 100644 index 7025607..0000000 --- a/lib/libpng-1.6.37/CMakeLists.txt +++ /dev/null @@ -1,931 +0,0 @@ -# CMakeLists.txt - -# Copyright (C) 2018 Cosmin Truta -# Copyright (C) 2007,2009-2018 Glenn Randers-Pehrson -# Written by Christian Ehrlicher, 2007 -# Revised by Roger Lowman, 2009-2010 -# Revised by Clifford Yapp, 2011-2012,2017 -# Revised by Roger Leigh, 2016 -# Revised by Andreas Franek, 2016 -# Revised by Sam Serrels, 2017 -# Revised by Vadim Barkov, 2017 -# Revised by Vicky Pfau, 2018 -# Revised by Cameron Cawley, 2018 -# Revised by Cosmin Truta, 2018 -# Revised by Kyle Bentley, 2018 - -# This code is released under the libpng license. -# For conditions of distribution and use, see the disclaimer -# and license in png.h - -cmake_minimum_required(VERSION 3.1) -cmake_policy(VERSION 3.1) - -project(libpng C ASM) -enable_testing() - -set(PNGLIB_MAJOR 1) -set(PNGLIB_MINOR 6) -set(PNGLIB_RELEASE 37) -set(PNGLIB_NAME libpng${PNGLIB_MAJOR}${PNGLIB_MINOR}) -set(PNGLIB_VERSION ${PNGLIB_MAJOR}.${PNGLIB_MINOR}.${PNGLIB_RELEASE}) - -include(GNUInstallDirs) - -# needed packages - -# Allow users to specify location of Zlib. -# Useful if zlib is being built alongside this as a sub-project. -option(PNG_BUILD_ZLIB "Custom zlib Location, else find_package is used" OFF) - -if(NOT PNG_BUILD_ZLIB) - find_package(ZLIB REQUIRED) - include_directories(${ZLIB_INCLUDE_DIR}) -endif() - -if(UNIX AND NOT APPLE AND NOT BEOS AND NOT HAIKU) - find_library(M_LIBRARY m) -else() - # libm is not needed and/or not available - set(M_LIBRARY "") -endif() - -# COMMAND LINE OPTIONS -option(PNG_SHARED "Build shared lib" ON) -option(PNG_STATIC "Build static lib" ON) -option(PNG_TESTS "Build libpng tests" OFF) - -# Many more configuration options could be added here -option(PNG_FRAMEWORK "Build OS X framework" OFF) -option(PNG_DEBUG "Build with debug output" OFF) -option(PNG_HARDWARE_OPTIMIZATIONS "Enable hardware optimizations" ON) - -set(PNG_PREFIX "" CACHE STRING "Prefix to add to the API function names") -set(DFA_XTRA "" CACHE FILEPATH "File containing extra configuration settings") - -if(PNG_HARDWARE_OPTIMIZATIONS) - -# set definitions and sources for arm -if(CMAKE_SYSTEM_PROCESSOR MATCHES "^arm" OR - CMAKE_SYSTEM_PROCESSOR MATCHES "^aarch64") - set(PNG_ARM_NEON_POSSIBLE_VALUES check on off) - set(PNG_ARM_NEON "check" CACHE STRING "Enable ARM NEON optimizations: - check: (default) use internal checking code; - off: disable the optimizations; - on: turn on unconditionally.") - set_property(CACHE PNG_ARM_NEON PROPERTY STRINGS - ${PNG_ARM_NEON_POSSIBLE_VALUES}) - list(FIND PNG_ARM_NEON_POSSIBLE_VALUES ${PNG_ARM_NEON} index) - if(index EQUAL -1) - message(FATAL_ERROR - "PNG_ARM_NEON must be one of [${PNG_ARM_NEON_POSSIBLE_VALUES}]") - elseif(NOT ${PNG_ARM_NEON} STREQUAL "off") - set(libpng_arm_sources - arm/arm_init.c - arm/filter_neon.S - arm/filter_neon_intrinsics.c - arm/palette_neon_intrinsics.c) - - if(${PNG_ARM_NEON} STREQUAL "on") - add_definitions(-DPNG_ARM_NEON_OPT=2) - elseif(${PNG_ARM_NEON} STREQUAL "check") - add_definitions(-DPNG_ARM_NEON_CHECK_SUPPORTED) - endif() - else() - add_definitions(-DPNG_ARM_NEON_OPT=0) - endif() -endif() - -# set definitions and sources for powerpc -if(CMAKE_SYSTEM_PROCESSOR MATCHES "^powerpc*" OR - CMAKE_SYSTEM_PROCESSOR MATCHES "^ppc64*") - set(PNG_POWERPC_VSX_POSSIBLE_VALUES on off) - set(PNG_POWERPC_VSX "on" CACHE STRING "Enable POWERPC VSX optimizations: - off: disable the optimizations.") - set_property(CACHE PNG_POWERPC_VSX PROPERTY STRINGS - ${PNG_POWERPC_VSX_POSSIBLE_VALUES}) - list(FIND PNG_POWERPC_VSX_POSSIBLE_VALUES ${PNG_POWERPC_VSX} index) - if(index EQUAL -1) - message(FATAL_ERROR - "PNG_POWERPC_VSX must be one of [${PNG_POWERPC_VSX_POSSIBLE_VALUES}]") - elseif(NOT ${PNG_POWERPC_VSX} STREQUAL "off") - set(libpng_powerpc_sources - powerpc/powerpc_init.c - powerpc/filter_vsx_intrinsics.c) - if(${PNG_POWERPC_VSX} STREQUAL "on") - add_definitions(-DPNG_POWERPC_VSX_OPT=2) - endif() - else() - add_definitions(-DPNG_POWERPC_VSX_OPT=0) - endif() -endif() - -# set definitions and sources for intel -if(CMAKE_SYSTEM_PROCESSOR MATCHES "^i?86" OR - CMAKE_SYSTEM_PROCESSOR MATCHES "^x86_64*") - set(PNG_INTEL_SSE_POSSIBLE_VALUES on off) - set(PNG_INTEL_SSE "on" CACHE STRING "Enable INTEL_SSE optimizations: - off: disable the optimizations") - set_property(CACHE PNG_INTEL_SSE PROPERTY STRINGS - ${PNG_INTEL_SSE_POSSIBLE_VALUES}) - list(FIND PNG_INTEL_SSE_POSSIBLE_VALUES ${PNG_INTEL_SSE} index) - if(index EQUAL -1) - message(FATAL_ERROR - "PNG_INTEL_SSE must be one of [${PNG_INTEL_SSE_POSSIBLE_VALUES}]") - elseif(NOT ${PNG_INTEL_SSE} STREQUAL "off") - set(libpng_intel_sources - intel/intel_init.c - intel/filter_sse2_intrinsics.c) - if(${PNG_INTEL_SSE} STREQUAL "on") - add_definitions(-DPNG_INTEL_SSE_OPT=1) - endif() - else() - add_definitions(-DPNG_INTEL_SSE_OPT=0) - endif() -endif() - -# set definitions and sources for MIPS -if(CMAKE_SYSTEM_PROCESSOR MATCHES "mipsel*" OR - CMAKE_SYSTEM_PROCESSOR MATCHES "mips64el*") - set(PNG_MIPS_MSA_POSSIBLE_VALUES on off) - set(PNG_MIPS_MSA "on" CACHE STRING "Enable MIPS_MSA optimizations: - off: disable the optimizations") - set_property(CACHE PNG_MIPS_MSA PROPERTY STRINGS - ${PNG_MIPS_MSA_POSSIBLE_VALUES}) - list(FIND PNG_MIPS_MSA_POSSIBLE_VALUES ${PNG_MIPS_MSA} index) - if(index EQUAL -1) - message(FATAL_ERROR - "PNG_MIPS_MSA must be one of [${PNG_MIPS_MSA_POSSIBLE_VALUES}]") - elseif(NOT ${PNG_MIPS_MSA} STREQUAL "off") - set(libpng_mips_sources - mips/mips_init.c - mips/filter_msa_intrinsics.c) - if(${PNG_MIPS_MSA} STREQUAL "on") - add_definitions(-DPNG_MIPS_MSA_OPT=2) - endif() - else() - add_definitions(-DPNG_MIPS_MSA_OPT=0) - endif() -endif() - -else(PNG_HARDWARE_OPTIMIZATIONS) - -# set definitions and sources for arm -if(CMAKE_SYSTEM_PROCESSOR MATCHES "^arm" OR - CMAKE_SYSTEM_PROCESSOR MATCHES "^aarch64") - add_definitions(-DPNG_ARM_NEON_OPT=0) -endif() - -# set definitions and sources for powerpc -if(CMAKE_SYSTEM_PROCESSOR MATCHES "^powerpc*" OR - CMAKE_SYSTEM_PROCESSOR MATCHES "^ppc64*") - add_definitions(-DPNG_POWERPC_VSX_OPT=0) -endif() - -# set definitions and sources for intel -if(CMAKE_SYSTEM_PROCESSOR MATCHES "^i?86" OR - CMAKE_SYSTEM_PROCESSOR MATCHES "^x86_64*") - add_definitions(-DPNG_INTEL_SSE_OPT=0) -endif() - -# set definitions and sources for MIPS -if(CMAKE_SYSTEM_PROCESSOR MATCHES "mipsel*" OR - CMAKE_SYSTEM_PROCESSOR MATCHES "mips64el*") - add_definitions(-DPNG_MIPS_MSA_OPT=0) -endif() - -endif(PNG_HARDWARE_OPTIMIZATIONS) - -# SET LIBNAME -set(PNG_LIB_NAME png${PNGLIB_MAJOR}${PNGLIB_MINOR}) - -# to distinguish between debug and release lib -set(CMAKE_DEBUG_POSTFIX "d") - -include(CheckCSourceCompiles) -option(ld-version-script "Enable linker version script" ON) -if(ld-version-script AND NOT APPLE) - # Check if LD supports linker scripts. - file(WRITE "${CMAKE_CURRENT_BINARY_DIR}/conftest.map" "VERS_1 { - global: sym; - local: *; -}; - -VERS_2 { - global: sym2; - main; -} VERS_1; -") - set(CMAKE_REQUIRED_FLAGS_SAVE ${CMAKE_REQUIRED_FLAGS}) - set(CMAKE_REQUIRED_FLAGS ${CMAKE_REQUIRED_FLAGS} "-Wl,--version-script='${CMAKE_CURRENT_BINARY_DIR}/conftest.map'") - check_c_source_compiles("void sym(void) {} -void sym2(void) {} -int main(void) {return 0;} -" HAVE_LD_VERSION_SCRIPT) - if(NOT HAVE_LD_VERSION_SCRIPT) - set(CMAKE_REQUIRED_FLAGS ${CMAKE_REQUIRED_FLAGS_SAVE} "-Wl,-M -Wl,${CMAKE_CURRENT_BINARY_DIR}/conftest.map") - check_c_source_compiles("void sym(void) {} -void sym2(void) {} -int main(void) {return 0;} -" HAVE_SOLARIS_LD_VERSION_SCRIPT) - endif() - set(CMAKE_REQUIRED_FLAGS ${CMAKE_REQUIRED_FLAGS_SAVE}) - file(REMOVE "${CMAKE_CURRENT_BINARY_DIR}/conftest.map") -endif() - -# Find symbol prefix. Likely obsolete and unnecessary with recent -# toolchains (it's not done in many other projects). -function(symbol_prefix) - set(SYMBOL_PREFIX) - - execute_process(COMMAND "${CMAKE_C_COMPILER}" "-E" "-" - INPUT_FILE /dev/null - OUTPUT_VARIABLE OUT - RESULT_VARIABLE STATUS) - - if(CPP_FAIL) - message(WARNING "Failed to run the C preprocessor") - endif() - - string(REPLACE "\n" ";" OUT "${OUT}") - foreach(line ${OUT}) - string(REGEX MATCH "^PREFIX=" found_match "${line}") - if(found_match) - string(REGEX REPLACE "^PREFIX=(.*\)" "\\1" prefix "${line}") - string(REGEX MATCH "__USER_LABEL_PREFIX__" found_match "${prefix}") - if(found_match) - string(REGEX REPLACE "(.*)__USER_LABEL_PREFIX__(.*)" "\\1\\2" prefix "${prefix}") - endif() - set(SYMBOL_PREFIX "${prefix}") - endif() - endforeach() - - message(STATUS "Symbol prefix: ${SYMBOL_PREFIX}") - set(SYMBOL_PREFIX "${SYMBOL_PREFIX}" PARENT_SCOPE) -endfunction() - -if(UNIX) - symbol_prefix() -endif() - -find_program(AWK NAMES gawk awk) - -include_directories(${CMAKE_CURRENT_BINARY_DIR}) - -if(NOT AWK OR ANDROID) - # No awk available to generate sources; use pre-built pnglibconf.h - configure_file(${CMAKE_CURRENT_SOURCE_DIR}/scripts/pnglibconf.h.prebuilt - ${CMAKE_CURRENT_BINARY_DIR}/pnglibconf.h) - add_custom_target(genfiles) # Dummy -else() - include(CMakeParseArguments) - # Generate .chk from .out with awk - # generate_chk(INPUT inputfile OUTPUT outputfile [DEPENDS dep1 [dep2...]]) - function(generate_chk) - set(options) - set(oneValueArgs INPUT OUTPUT) - set(multiValueArgs DEPENDS) - cmake_parse_arguments(_GC "${options}" "${oneValueArgs}" "${multiValueArgs}" ${ARGN}) - if(NOT _GC_INPUT) - message(FATAL_ERROR "generate_chk: Missing INPUT argument") - endif() - if(NOT _GC_OUTPUT) - message(FATAL_ERROR "generate_chk: Missing OUTPUT argument") - endif() - - add_custom_command(OUTPUT "${_GC_OUTPUT}" - COMMAND "${CMAKE_COMMAND}" - "-DINPUT=${_GC_INPUT}" - "-DOUTPUT=${_GC_OUTPUT}" - -P "${CMAKE_CURRENT_BINARY_DIR}/scripts/genchk.cmake" - DEPENDS "${_GC_INPUT}" ${_GC_DEPENDS} - WORKING_DIRECTORY "${CMAKE_CURRENT_BINARY_DIR}") - endfunction() - - # Generate .out from .c with awk - # generate_out(INPUT inputfile OUTPUT outputfile [DEPENDS dep1 [dep2...]]) - function(generate_out) - set(options) - set(oneValueArgs INPUT OUTPUT) - set(multiValueArgs DEPENDS) - cmake_parse_arguments(_GO "${options}" "${oneValueArgs}" "${multiValueArgs}" ${ARGN}) - if(NOT _GO_INPUT) - message(FATAL_ERROR "generate_out: Missing INPUT argument") - endif() - if(NOT _GO_OUTPUT) - message(FATAL_ERROR "generate_out: Missing OUTPUT argument") - endif() - - add_custom_command(OUTPUT "${_GO_OUTPUT}" - COMMAND "${CMAKE_COMMAND}" - "-DINPUT=${_GO_INPUT}" - "-DOUTPUT=${_GO_OUTPUT}" - -P "${CMAKE_CURRENT_BINARY_DIR}/scripts/genout.cmake" - DEPENDS "${_GO_INPUT}" ${_GO_DEPENDS} - WORKING_DIRECTORY "${CMAKE_CURRENT_BINARY_DIR}") - endfunction() - - # Generate specific source file with awk - # generate_source(OUTPUT outputfile [DEPENDS dep1 [dep2...]]) - function(generate_source) - set(options) - set(oneValueArgs OUTPUT) - set(multiValueArgs DEPENDS) - cmake_parse_arguments(_GSO "${options}" "${oneValueArgs}" "${multiValueArgs}" ${ARGN}) - if(NOT _GSO_OUTPUT) - message(FATAL_ERROR "generate_source: Missing OUTPUT argument") - endif() - - add_custom_command(OUTPUT "${CMAKE_CURRENT_BINARY_DIR}/${_GSO_OUTPUT}" - COMMAND "${CMAKE_COMMAND}" - "-DOUTPUT=${_GSO_OUTPUT}" - -P "${CMAKE_CURRENT_BINARY_DIR}/scripts/gensrc.cmake" - DEPENDS ${_GSO_DEPENDS} - WORKING_DIRECTORY "${CMAKE_CURRENT_BINARY_DIR}") - endfunction() - - # Copy file - function(generate_copy source destination) - add_custom_command(OUTPUT "${destination}" - COMMAND "${CMAKE_COMMAND}" -E remove "${destination}" - COMMAND "${CMAKE_COMMAND}" -E copy "${source}" - "${destination}" - DEPENDS "${source}") - endfunction() - - # Generate scripts/pnglibconf.h - generate_source(OUTPUT "scripts/pnglibconf.c" - DEPENDS "${CMAKE_CURRENT_SOURCE_DIR}/scripts/pnglibconf.dfa" - "${CMAKE_CURRENT_SOURCE_DIR}/scripts/options.awk" - "${CMAKE_CURRENT_SOURCE_DIR}/pngconf.h") - - # Generate pnglibconf.c - generate_source(OUTPUT "pnglibconf.c" - DEPENDS "${CMAKE_CURRENT_SOURCE_DIR}/scripts/pnglibconf.dfa" - "${CMAKE_CURRENT_SOURCE_DIR}/scripts/options.awk" - "${CMAKE_CURRENT_SOURCE_DIR}/pngconf.h") - - if(PNG_PREFIX) - set(PNGLIBCONF_H_EXTRA_DEPENDS - "${CMAKE_CURRENT_BINARY_DIR}/scripts/prefix.out" - "${CMAKE_CURRENT_SOURCE_DIR}/scripts/macro.lst") - set(PNGPREFIX_H_EXTRA_DEPENDS - "${CMAKE_CURRENT_BINARY_DIR}/scripts/intprefix.out") - endif() - - generate_out(INPUT "${CMAKE_CURRENT_BINARY_DIR}/pnglibconf.c" - OUTPUT "${CMAKE_CURRENT_BINARY_DIR}/pnglibconf.out") - - # Generate pnglibconf.h - generate_source(OUTPUT "pnglibconf.h" - DEPENDS "${CMAKE_CURRENT_BINARY_DIR}/pnglibconf.out" - ${PNGLIBCONF_H_EXTRA_DEPENDS}) - - generate_out(INPUT "${CMAKE_CURRENT_SOURCE_DIR}/scripts/intprefix.c" - OUTPUT "${CMAKE_CURRENT_BINARY_DIR}/scripts/intprefix.out" - DEPENDS "${CMAKE_CURRENT_BINARY_DIR}/pnglibconf.h") - - generate_out(INPUT "${CMAKE_CURRENT_SOURCE_DIR}/scripts/prefix.c" - OUTPUT "${CMAKE_CURRENT_BINARY_DIR}/scripts/prefix.out" - DEPENDS "${CMAKE_CURRENT_SOURCE_DIR}/png.h" - "${CMAKE_CURRENT_SOURCE_DIR}/pngconf.h" - "${CMAKE_CURRENT_BINARY_DIR}/pnglibconf.out") - - # Generate pngprefix.h - generate_source(OUTPUT "pngprefix.h" - DEPENDS ${PNGPREFIX_H_EXTRA_DEPENDS}) - - generate_out(INPUT "${CMAKE_CURRENT_SOURCE_DIR}/scripts/sym.c" - OUTPUT "${CMAKE_CURRENT_BINARY_DIR}/scripts/sym.out" - DEPENDS "${CMAKE_CURRENT_BINARY_DIR}/pnglibconf.h") - - generate_out(INPUT "${CMAKE_CURRENT_SOURCE_DIR}/scripts/symbols.c" - OUTPUT "${CMAKE_CURRENT_BINARY_DIR}/scripts/symbols.out" - DEPENDS "${CMAKE_CURRENT_SOURCE_DIR}/png.h" - "${CMAKE_CURRENT_SOURCE_DIR}/pngconf.h" - "${CMAKE_CURRENT_SOURCE_DIR}/scripts/pnglibconf.h.prebuilt") - - generate_out(INPUT "${CMAKE_CURRENT_SOURCE_DIR}/scripts/vers.c" - OUTPUT "${CMAKE_CURRENT_BINARY_DIR}/scripts/vers.out" - DEPENDS "${CMAKE_CURRENT_SOURCE_DIR}/png.h" - "${CMAKE_CURRENT_SOURCE_DIR}/pngconf.h" - "${CMAKE_CURRENT_BINARY_DIR}/pnglibconf.h") - - generate_chk(INPUT "${CMAKE_CURRENT_BINARY_DIR}/scripts/symbols.out" - OUTPUT "${CMAKE_CURRENT_BINARY_DIR}/scripts/symbols.chk" - DEPENDS "${CMAKE_CURRENT_SOURCE_DIR}/scripts/checksym.awk" - "${CMAKE_CURRENT_SOURCE_DIR}/scripts/symbols.def") - - add_custom_target(symbol-check DEPENDS - "${CMAKE_CURRENT_BINARY_DIR}/scripts/symbols.chk") - - generate_copy("${CMAKE_CURRENT_BINARY_DIR}/scripts/sym.out" - "${CMAKE_CURRENT_BINARY_DIR}/libpng.sym") - generate_copy("${CMAKE_CURRENT_BINARY_DIR}/scripts/vers.out" - "${CMAKE_CURRENT_BINARY_DIR}/libpng.vers") - - add_custom_target(genvers DEPENDS "${CMAKE_CURRENT_BINARY_DIR}/libpng.vers") - add_custom_target(gensym DEPENDS "${CMAKE_CURRENT_BINARY_DIR}/libpng.sym") - - add_custom_target("genprebuilt" - COMMAND "${CMAKE_COMMAND}" - "-DOUTPUT=scripts/pnglibconf.h.prebuilt" - -P "${CMAKE_CURRENT_BINARY_DIR}/scripts/gensrc.cmake" - WORKING_DIRECTORY "${CMAKE_CURRENT_BINARY_DIR}") - - # A single target handles generation of all generated files. If - # they are depended upon separately by multiple targets, this - # confuses parallel make (it would require a separate top-level - # target for each file to track the dependencies properly). - add_custom_target(genfiles DEPENDS - "${CMAKE_CURRENT_BINARY_DIR}/libpng.sym" - "${CMAKE_CURRENT_BINARY_DIR}/libpng.vers" - "${CMAKE_CURRENT_BINARY_DIR}/pnglibconf.c" - "${CMAKE_CURRENT_BINARY_DIR}/pnglibconf.h" - "${CMAKE_CURRENT_BINARY_DIR}/pnglibconf.out" - "${CMAKE_CURRENT_BINARY_DIR}/pngprefix.h" - "${CMAKE_CURRENT_BINARY_DIR}/scripts/intprefix.out" - "${CMAKE_CURRENT_BINARY_DIR}/scripts/pnglibconf.c" - "${CMAKE_CURRENT_BINARY_DIR}/scripts/prefix.out" - "${CMAKE_CURRENT_BINARY_DIR}/scripts/sym.out" - "${CMAKE_CURRENT_BINARY_DIR}/scripts/symbols.chk" - "${CMAKE_CURRENT_BINARY_DIR}/scripts/symbols.out" - "${CMAKE_CURRENT_BINARY_DIR}/scripts/vers.out") -endif(NOT AWK OR ANDROID) - -# OUR SOURCES -set(libpng_public_hdrs - png.h - pngconf.h - "${CMAKE_CURRENT_BINARY_DIR}/pnglibconf.h" -) -set(libpng_private_hdrs - pngpriv.h - pngdebug.h - pnginfo.h - pngstruct.h -) -if(AWK AND NOT ANDROID) - list(APPEND libpng_private_hdrs "${CMAKE_CURRENT_BINARY_DIR}/pngprefix.h") -endif() -set(libpng_sources - ${libpng_public_hdrs} - ${libpng_private_hdrs} - png.c - pngerror.c - pngget.c - pngmem.c - pngpread.c - pngread.c - pngrio.c - pngrtran.c - pngrutil.c - pngset.c - pngtrans.c - pngwio.c - pngwrite.c - pngwtran.c - pngwutil.c - ${libpng_arm_sources} - ${libpng_intel_sources} - ${libpng_mips_sources} - ${libpng_powerpc_sources} -) -set(pngtest_sources - pngtest.c -) -set(pngvalid_sources - contrib/libtests/pngvalid.c -) -set(pngstest_sources - contrib/libtests/pngstest.c -) -set(pngunknown_sources - contrib/libtests/pngunknown.c -) -set(pngimage_sources - contrib/libtests/pngimage.c -) -set(pngfix_sources - contrib/tools/pngfix.c -) -set(png_fix_itxt_sources - contrib/tools/png-fix-itxt.c -) - -if(MSVC) - add_definitions(-D_CRT_SECURE_NO_DEPRECATE) -endif() - -if(PNG_DEBUG) - add_definitions(-DPNG_DEBUG) -endif() - -# NOW BUILD OUR TARGET -include_directories(${CMAKE_CURRENT_SOURCE_DIR} ${ZLIB_INCLUDE_DIR}) - -unset(PNG_LIB_TARGETS) - -if(PNG_SHARED) - add_library(png SHARED ${libpng_sources}) - set(PNG_LIB_TARGETS png) - set_target_properties(png PROPERTIES OUTPUT_NAME ${PNG_LIB_NAME}) - add_dependencies(png genfiles) - if(MSVC) - # msvc does not append 'lib' - do it here to have consistent name - set_target_properties(png PROPERTIES PREFIX "lib") - set_target_properties(png PROPERTIES IMPORT_PREFIX "lib") - endif() - target_link_libraries(png ${ZLIB_LIBRARY} ${M_LIBRARY}) - - if(UNIX AND AWK) - if(HAVE_LD_VERSION_SCRIPT) - set_target_properties(png PROPERTIES LINK_FLAGS - "-Wl,--version-script='${CMAKE_CURRENT_BINARY_DIR}/libpng.vers'") - elseif(HAVE_SOLARIS_LD_VERSION_SCRIPT) - set_target_properties(png PROPERTIES LINK_FLAGS - "-Wl,-M -Wl,'${CMAKE_CURRENT_BINARY_DIR}/libpng.vers'") - endif() - endif() -endif() - -if(PNG_STATIC) - # does not work without changing name - set(PNG_LIB_NAME_STATIC png_static) - add_library(png_static STATIC ${libpng_sources}) - add_dependencies(png_static genfiles) - # MSVC doesn't use a different file extension for shared vs. static - # libs. We are able to change OUTPUT_NAME to remove the _static - # for all other platforms. - if(NOT MSVC) - set_target_properties(png_static PROPERTIES - OUTPUT_NAME "${PNG_LIB_NAME}" - CLEAN_DIRECT_OUTPUT 1) - else() - set_target_properties(png_static PROPERTIES - OUTPUT_NAME "${PNG_LIB_NAME}_static" - CLEAN_DIRECT_OUTPUT 1) - endif() - list(APPEND PNG_LIB_TARGETS png_static) - if(MSVC) - # msvc does not append 'lib' - do it here to have consistent name - set_target_properties(png_static PROPERTIES PREFIX "lib") - endif() - target_link_libraries(png_static ${ZLIB_LIBRARY} ${M_LIBRARY}) -endif() - -if(PNG_FRAMEWORK) - set(PNG_LIB_NAME_FRAMEWORK png_framework) - add_library(png_framework SHARED ${libpng_sources}) - add_dependencies(png_framework genfiles) - list(APPEND PNG_LIB_TARGETS png_framework) - set_target_properties(png_framework PROPERTIES - FRAMEWORK TRUE - FRAMEWORK_VERSION ${PNGLIB_VERSION} - MACOSX_FRAMEWORK_SHORT_VERSION_STRING ${PNGLIB_MAJOR}.${PNGLIB_MINOR} - MACOSX_FRAMEWORK_BUNDLE_VERSION ${PNGLIB_VERSION} - MACOSX_FRAMEWORK_IDENTIFIER org.libpng.libpng - XCODE_ATTRIBUTE_INSTALL_PATH "@rpath" - PUBLIC_HEADER "${libpng_public_hdrs}" - OUTPUT_NAME png) - target_link_libraries(png_framework ${ZLIB_LIBRARY} ${M_LIBRARY}) -endif() - -if(NOT PNG_LIB_TARGETS) - message(SEND_ERROR - "No library variant selected to build. " - "Please enable at least one of the following options: " - "PNG_STATIC, PNG_SHARED, PNG_FRAMEWORK") -endif() - -if(PNG_SHARED AND WIN32) - set_target_properties(png PROPERTIES DEFINE_SYMBOL PNG_BUILD_DLL) -endif() - -function(png_add_test) - set(options) - set(oneValueArgs NAME COMMAND) - set(multiValueArgs OPTIONS FILES) - cmake_parse_arguments(_PAT "${options}" "${oneValueArgs}" "${multiValueArgs}" ${ARGN}) - - if(NOT _PAT_NAME) - message(FATAL_ERROR "png_add_test: Missing NAME argument") - endif() - if(NOT _PAT_COMMAND) - message(FATAL_ERROR "png_add_test: Missing COMMAND argument") - endif() - - set(TEST_OPTIONS "${_PAT_OPTIONS}") - set(TEST_FILES "${_PAT_FILES}") - - configure_file("${CMAKE_CURRENT_SOURCE_DIR}/scripts/test.cmake.in" - "${CMAKE_CURRENT_BINARY_DIR}/tests/${_PAT_NAME}.cmake" @ONLY) - add_test(NAME "${_PAT_NAME}" - COMMAND "${CMAKE_COMMAND}" - "-DLIBPNG=$" - "-DTEST_COMMAND=$" - -P "${CMAKE_CURRENT_BINARY_DIR}/tests/${_PAT_NAME}.cmake") -endfunction() - -if(PNG_TESTS AND PNG_SHARED) - # Find test PNG files by globbing, but sort lists to ensure - # consistency between different filesystems. - file(GLOB PNGSUITE_PNGS "${CMAKE_CURRENT_SOURCE_DIR}/contrib/pngsuite/*.png") - list(SORT PNGSUITE_PNGS) - file(GLOB TEST_PNGS "${CMAKE_CURRENT_SOURCE_DIR}/contrib/testpngs/*.png") - list(SORT TEST_PNGS) - - set(PNGTEST_PNG "${CMAKE_CURRENT_SOURCE_DIR}/pngtest.png") - - add_executable(pngtest ${pngtest_sources}) - target_link_libraries(pngtest png) - - png_add_test(NAME pngtest COMMAND pngtest FILES "${PNGTEST_PNG}") - - add_executable(pngvalid ${pngvalid_sources}) - target_link_libraries(pngvalid png) - - png_add_test(NAME pngvalid-gamma-16-to-8 - COMMAND pngvalid OPTIONS --gamma-16-to-8) - png_add_test(NAME pngvalid-gamma-alpha-mode - COMMAND pngvalid OPTIONS --gamma-alpha-mode) - png_add_test(NAME pngvalid-gamma-background - COMMAND pngvalid OPTIONS --gamma-background) - png_add_test(NAME pngvalid-gamma-expand16-alpha-mode - COMMAND pngvalid OPTIONS --gamma-alpha-mode --expand16) - png_add_test(NAME pngvalid-gamma-expand16-background - COMMAND pngvalid OPTIONS --gamma-background --expand16) - png_add_test(NAME pngvalid-gamma-expand16-transform - COMMAND pngvalid OPTIONS --gamma-transform --expand16) - png_add_test(NAME pngvalid-gamma-sbit - COMMAND pngvalid OPTIONS --gamma-sbit) - png_add_test(NAME pngvalid-gamma-threshold - COMMAND pngvalid OPTIONS --gamma-threshold) - png_add_test(NAME pngvalid-gamma-transform - COMMAND pngvalid OPTIONS --gamma-transform) - png_add_test(NAME pngvalid-progressive-interlace-standard - COMMAND pngvalid OPTIONS --standard --progressive-read --interlace) - png_add_test(NAME pngvalid-progressive-size - COMMAND pngvalid OPTIONS --size --progressive-read) - png_add_test(NAME pngvalid-progressive-standard - COMMAND pngvalid OPTIONS --standard --progressive-read) - png_add_test(NAME pngvalid-standard - COMMAND pngvalid OPTIONS --standard) - png_add_test(NAME pngvalid-transform - COMMAND pngvalid OPTIONS --transform) - - add_executable(pngstest ${pngstest_sources}) - target_link_libraries(pngstest png) - - foreach(gamma_type 1.8 linear none sRGB) - foreach(alpha_type none alpha) - set(PNGSTEST_FILES) - foreach(test_png ${TEST_PNGS}) - string(REGEX MATCH ".*-linear[-.].*" TEST_PNG_LINEAR "${test_png}") - string(REGEX MATCH ".*-sRGB[-.].*" TEST_PNG_SRGB "${test_png}") - string(REGEX MATCH ".*-1.8[-.].*" TEST_PNG_G18 "${test_png}") - string(REGEX MATCH ".*-alpha-.*" TEST_PNG_ALPHA "${test_png}") - - set(TEST_PNG_VALID TRUE) - - if(TEST_PNG_ALPHA) - if(NOT "${alpha_type}" STREQUAL "alpha") - set(TEST_PNG_VALID FALSE) - endif() - else() - if("${alpha_type}" STREQUAL "alpha") - set(TEST_PNG_VALID FALSE) - endif() - endif() - - if(TEST_PNG_LINEAR) - if(NOT "${gamma_type}" STREQUAL "linear") - set(TEST_PNG_VALID FALSE) - endif() - elseif(TEST_PNG_SRGB) - if(NOT "${gamma_type}" STREQUAL "sRGB") - set(TEST_PNG_VALID FALSE) - endif() - elseif(TEST_PNG_G18) - if(NOT "${gamma_type}" STREQUAL "1.8") - set(TEST_PNG_VALID FALSE) - endif() - else() - if(NOT "${gamma_type}" STREQUAL "none") - set(TEST_PNG_VALID FALSE) - endif() - endif() - - if(TEST_PNG_VALID) - list(APPEND PNGSTEST_FILES "${test_png}") - endif() - endforeach() - # Should already be sorted, but sort anyway to be certain. - list(SORT PNGSTEST_FILES) - png_add_test(NAME pngstest-${gamma_type}-${alpha_type} - COMMAND pngstest - OPTIONS --tmpfile "${gamma_type}-${alpha_type}-" --log - FILES ${PNGSTEST_FILES}) - endforeach() - endforeach() - - add_executable(pngunknown ${pngunknown_sources}) - target_link_libraries(pngunknown png) - - png_add_test(NAME pngunknown-discard COMMAND pngunknown OPTIONS --strict default=discard FILES "${PNGTEST_PNG}") - png_add_test(NAME pngunknown-IDAT COMMAND pngunknown OPTIONS --strict default=discard IDAT=save FILES "${PNGTEST_PNG}") - png_add_test(NAME pngunknown-if-safe COMMAND pngunknown OPTIONS --strict default=if-safe FILES "${PNGTEST_PNG}") - png_add_test(NAME pngunknown-sAPI COMMAND pngunknown OPTIONS --strict bKGD=save cHRM=save gAMA=save all=discard iCCP=save sBIT=save sRGB=save FILES "${PNGTEST_PNG}") - png_add_test(NAME pngunknown-save COMMAND pngunknown OPTIONS --strict default=save FILES "${PNGTEST_PNG}") - png_add_test(NAME pngunknown-sTER COMMAND pngunknown OPTIONS --strict sTER=if-safe FILES "${PNGTEST_PNG}") - png_add_test(NAME pngunknown-vpAg COMMAND pngunknown OPTIONS --strict vpAg=if-safe FILES "${PNGTEST_PNG}") - - add_executable(pngimage ${pngimage_sources}) - target_link_libraries(pngimage png) - - png_add_test(NAME pngimage-quick COMMAND pngimage OPTIONS --list-combos --log FILES ${PNGSUITE_PNGS}) - png_add_test(NAME pngimage-full COMMAND pngimage OPTIONS --exhaustive --list-combos --log FILES ${PNGSUITE_PNGS}) -endif() - -if(PNG_SHARED) - add_executable(pngfix ${pngfix_sources}) - target_link_libraries(pngfix png) - set(PNG_BIN_TARGETS pngfix) - - add_executable(png-fix-itxt ${png_fix_itxt_sources}) - target_link_libraries(png-fix-itxt ${ZLIB_LIBRARY} ${M_LIBRARY}) - list(APPEND PNG_BIN_TARGETS png-fix-itxt) -endif() - -# Set a variable with CMake code which: -# Creates a symlink from src to dest (if possible) or alternatively -# copies if different. -include(CMakeParseArguments) - -function(create_symlink DEST_FILE) - - cmake_parse_arguments(S "" "FILE;TARGET" "" ${ARGN}) - - if(NOT S_TARGET AND NOT S_FILE) - message(FATAL_ERROR "create_symlink: Missing TARGET or FILE argument") - endif() - - if(S_TARGET AND S_FILE) - message(FATAL_ERROR "create_symlink: Both source file ${S_FILE} and build target ${S_TARGET} arguments are present; can only have one.") - endif() - - if(S_FILE) - # If we don't need to symlink something that's coming from a build target, - # we can go ahead and symlink/copy at configure time. - if(CMAKE_HOST_WIN32 AND NOT CYGWIN) - execute_process( - COMMAND "${CMAKE_COMMAND}" -E copy_if_different ${S_FILE} ${DEST_FILE} - WORKING_DIRECTORY "${CMAKE_CURRENT_BINARY_DIR}") - else() - execute_process( - COMMAND ${CMAKE_COMMAND} -E create_symlink ${S_FILE} ${DEST_FILE} - WORKING_DIRECTORY "${CMAKE_CURRENT_BINARY_DIR}") - endif() - endif() - - if(S_TARGET) - # We need to use generator expressions, which can be a bit tricky, so for - # simplicity make the symlink a POST_BUILD step and use the TARGET - # signature of add_custom_command. - if(CMAKE_HOST_WIN32 AND NOT CYGWIN) - add_custom_command(TARGET ${S_TARGET} POST_BUILD - COMMAND "${CMAKE_COMMAND}" -E copy_if_different $ $/${DEST_FILE}) - else() - add_custom_command(TARGET ${S_TARGET} POST_BUILD - COMMAND "${CMAKE_COMMAND}" -E create_symlink $ $/${DEST_FILE}) - endif() - endif() - -endfunction() - -# Create source generation scripts. -configure_file(${CMAKE_CURRENT_SOURCE_DIR}/scripts/genchk.cmake.in - ${CMAKE_CURRENT_BINARY_DIR}/scripts/genchk.cmake @ONLY) -configure_file(${CMAKE_CURRENT_SOURCE_DIR}/scripts/genout.cmake.in - ${CMAKE_CURRENT_BINARY_DIR}/scripts/genout.cmake @ONLY) -configure_file(${CMAKE_CURRENT_SOURCE_DIR}/scripts/gensrc.cmake.in - ${CMAKE_CURRENT_BINARY_DIR}/scripts/gensrc.cmake @ONLY) - -# libpng is a library so default to 'lib' -if(NOT DEFINED CMAKE_INSTALL_LIBDIR) - set(CMAKE_INSTALL_LIBDIR lib) -endif() - -# CREATE PKGCONFIG FILES -# We use the same files like ./configure, so we have to set its vars. -# Only do this on Windows for Cygwin - the files don't make much sense outside -# of a UNIX look-alike. -if(NOT WIN32 OR CYGWIN OR MINGW) - set(prefix ${CMAKE_INSTALL_PREFIX}) - set(exec_prefix ${CMAKE_INSTALL_PREFIX}) - set(libdir ${CMAKE_INSTALL_FULL_LIBDIR}) - set(includedir ${CMAKE_INSTALL_FULL_INCLUDEDIR}) - set(LIBS "-lz -lm") - configure_file(${CMAKE_CURRENT_SOURCE_DIR}/libpng.pc.in - ${CMAKE_CURRENT_BINARY_DIR}/${PNGLIB_NAME}.pc @ONLY) - create_symlink(libpng.pc FILE ${PNGLIB_NAME}.pc) - - configure_file(${CMAKE_CURRENT_SOURCE_DIR}/libpng-config.in - ${CMAKE_CURRENT_BINARY_DIR}/${PNGLIB_NAME}-config @ONLY) - create_symlink(libpng-config FILE ${PNGLIB_NAME}-config) -endif() - -# SET UP LINKS -if(PNG_SHARED) - set_target_properties(png PROPERTIES -# VERSION 16.${PNGLIB_RELEASE}.1.6.37 - VERSION 16.${PNGLIB_RELEASE}.0 - SOVERSION 16 - CLEAN_DIRECT_OUTPUT 1) -endif() - -# INSTALL -if(NOT SKIP_INSTALL_LIBRARIES AND NOT SKIP_INSTALL_ALL) - install(TARGETS ${PNG_LIB_TARGETS} - EXPORT libpng - RUNTIME DESTINATION bin - LIBRARY DESTINATION ${CMAKE_INSTALL_LIBDIR} - ARCHIVE DESTINATION ${CMAKE_INSTALL_LIBDIR} - FRAMEWORK DESTINATION ${CMAKE_INSTALL_LIBDIR}) - - if(PNG_SHARED) - # Create a symlink for libpng.dll.a => libpng16.dll.a on Cygwin - if(CYGWIN OR MINGW) - create_symlink(libpng${CMAKE_IMPORT_LIBRARY_SUFFIX} TARGET png) - install(FILES $/libpng${CMAKE_IMPORT_LIBRARY_SUFFIX} - DESTINATION ${CMAKE_INSTALL_LIBDIR}) - endif() - - if(NOT WIN32) - create_symlink(libpng${CMAKE_SHARED_LIBRARY_SUFFIX} TARGET png) - install(FILES $/libpng${CMAKE_SHARED_LIBRARY_SUFFIX} - DESTINATION ${CMAKE_INSTALL_LIBDIR}) - endif() - endif() - - if(PNG_STATIC) - if(NOT WIN32 OR CYGWIN OR MINGW) - create_symlink(libpng${CMAKE_STATIC_LIBRARY_SUFFIX} TARGET png_static) - install(FILES $/libpng${CMAKE_STATIC_LIBRARY_SUFFIX} - DESTINATION ${CMAKE_INSTALL_LIBDIR}) - endif() - endif() -endif() - -if(NOT SKIP_INSTALL_HEADERS AND NOT SKIP_INSTALL_ALL) - install(FILES ${libpng_public_hdrs} DESTINATION include) - install(FILES ${libpng_public_hdrs} DESTINATION include/${PNGLIB_NAME}) -endif() -if(NOT SKIP_INSTALL_EXECUTABLES AND NOT SKIP_INSTALL_ALL) - if(NOT WIN32 OR CYGWIN OR MINGW) - install(PROGRAMS ${CMAKE_CURRENT_BINARY_DIR}/libpng-config DESTINATION bin) - install(PROGRAMS ${CMAKE_CURRENT_BINARY_DIR}/${PNGLIB_NAME}-config DESTINATION bin) - endif() -endif() - -if(NOT SKIP_INSTALL_PROGRAMS AND NOT SKIP_INSTALL_ALL) - install(TARGETS ${PNG_BIN_TARGETS} - RUNTIME DESTINATION bin) -endif() - -if(NOT SKIP_INSTALL_FILES AND NOT SKIP_INSTALL_ALL) - # Install man pages - if(NOT PNG_MAN_DIR) - set(PNG_MAN_DIR "share/man") - endif() - install(FILES libpng.3 libpngpf.3 DESTINATION ${PNG_MAN_DIR}/man3) - install(FILES png.5 DESTINATION ${PNG_MAN_DIR}/man5) - # Install pkg-config files - if(NOT CMAKE_HOST_WIN32 OR CYGWIN OR MINGW) - install(FILES ${CMAKE_CURRENT_BINARY_DIR}/libpng.pc - DESTINATION ${CMAKE_INSTALL_LIBDIR}/pkgconfig) - install(PROGRAMS ${CMAKE_CURRENT_BINARY_DIR}/libpng-config - DESTINATION bin) - install(FILES ${CMAKE_CURRENT_BINARY_DIR}/${PNGLIB_NAME}.pc - DESTINATION ${CMAKE_INSTALL_LIBDIR}/pkgconfig) - install(PROGRAMS ${CMAKE_CURRENT_BINARY_DIR}/${PNGLIB_NAME}-config - DESTINATION bin) - endif() -endif() - -# Create an export file that CMake users can include() to import our targets. -if(NOT SKIP_INSTALL_EXPORT AND NOT SKIP_INSTALL_ALL) - install(EXPORT libpng DESTINATION lib/libpng FILE lib${PNG_LIB_NAME}.cmake) -endif() - -# what's with libpng-manual.txt and all the extra files? - -# UNINSTALL -# do we need this? - -# DIST -# do we need this? - -# to create msvc import lib for mingw compiled shared lib -# pexports libpng.dll > libpng.def -# lib /def:libpng.def /machine:x86 diff --git a/lib/libpng-1.6.37/INSTALL b/lib/libpng-1.6.37/INSTALL deleted file mode 100644 index 4c17022..0000000 --- a/lib/libpng-1.6.37/INSTALL +++ /dev/null @@ -1,465 +0,0 @@ - - Installing libpng - -Contents - - I. Simple installation - II. Rebuilding the configure scripts - III. Using scripts/makefile* - IV. Using cmake - V. Directory structure - VI. Building with project files - VII. Building with makefiles - VIII. Configuring libpng for 16-bit platforms - IX. Configuring for DOS - X. Configuring for Medium Model - XI. Prepending a prefix to exported symbols - XII. Configuring for compiler xxx: - XIII. Removing unwanted object code - XIV. Enabling or disabling hardware optimizations - XV. Changes to the build and configuration of libpng in libpng-1.5.x - XVI. Setjmp/longjmp issues - XVII. Common linking failures - XVIII. Other sources of information about libpng - -I. Simple installation - -On Unix/Linux and similar systems, you can simply type - - ./configure [--prefix=/path] - make check - make install - -and ignore the rest of this document. "/path" is the path to the directory -where you want to install the libpng "lib", "include", and "bin" -subdirectories. - -If you downloaded a GIT clone, you will need to run ./autogen.sh before -running ./configure, to create "configure" and "Makefile.in" which are -not included in the GIT repository. - -Note that "configure" is only included in the "*.tar" distributions and not -in the "*.zip" or "*.7z" distributions. If you downloaded one of those -distributions, see "Building with project files" or "Building with makefiles", -below. - -II. Rebuilding the configure scripts - -If configure does not work on your system, or if you have a need to -change configure.ac or Makefile.am, and you have a reasonably -up-to-date set of tools, running ./autogen.sh in a git clone before -running ./configure may fix the problem. To be really sure that you -aren't using any of the included pre-built scripts, especially if you -are building from a tar distribution instead of a git distribution, -do this: - - ./configure --enable-maintainer-mode - make maintainer-clean - ./autogen.sh --maintainer --clean - ./autogen.sh --maintainer - ./configure [--prefix=/path] [other options] - make - make install - make check - -III. Using scripts/makefile* - -Instead, you can use one of the custom-built makefiles in the -"scripts" directory - - cp scripts/pnglibconf.h.prebuilt pnglibconf.h - cp scripts/makefile.system makefile - make test - make install - -The files that are presently available in the scripts directory -are listed and described in scripts/README.txt. - -Or you can use one of the "projects" in the "projects" directory. - -Before installing libpng, you must first install zlib, if it -is not already on your system. zlib can usually be found -wherever you got libpng; otherwise go to https://zlib.net/. You can -place zlib in the same directory as libpng or in another directory. - -If your system already has a preinstalled zlib you will still need -to have access to the zlib.h and zconf.h include files that -correspond to the version of zlib that's installed. - -If you wish to test with a particular zlib that is not first in the -standard library search path, put ZLIBLIB, ZLIBINC, CPPFLAGS, LDFLAGS, -and LD_LIBRARY_PATH in your environment before running "make test" -or "make distcheck": - - ZLIBLIB=/path/to/lib export ZLIBLIB - ZLIBINC=/path/to/include export ZLIBINC - CPPFLAGS="-I$ZLIBINC" export CPPFLAGS - LDFLAGS="-L$ZLIBLIB" export LDFLAGS - LD_LIBRARY_PATH="$ZLIBLIB:$LD_LIBRARY_PATH" export LD_LIBRARY_PATH - -If you are using one of the makefile scripts, put ZLIBLIB and ZLIBINC -in your environment and type - - make ZLIBLIB=$ZLIBLIB ZLIBINC=$ZLIBINC test - -IV. Using cmake - -If you want to use "cmake" (see www.cmake.org), type - - cmake . -DCMAKE_INSTALL_PREFIX=/path - make - make install - -As when using the simple configure method described above, "/path" points to -the installation directory where you want to put the libpng "lib", "include", -and "bin" subdirectories. - -V. Directory structure - -You can rename the directories that you downloaded (they -might be called "libpng-x.y.z" or "libpngNN" and "zlib-1.2.8" -or "zlib128") so that you have directories called "zlib" and "libpng". - -Your directory structure should look like this: - - .. (the parent directory) - libpng (this directory) - INSTALL (this file) - README - *.h, *.c => libpng source files - CMakeLists.txt => "cmake" script - configuration files: - configure.ac, configure, Makefile.am, Makefile.in, - autogen.sh, config.guess, ltmain.sh, missing, libpng.pc.in, - libpng-config.in, aclocal.m4, config.h.in, config.sub, - depcomp, install-sh, mkinstalldirs, test-pngtest.sh - contrib - arm-neon, conftest, examples, gregbook, libtests, pngminim, - pngminus, pngsuite, tools, visupng - projects - cbuilder5, owatcom, visualc71, vstudio, xcode - scripts - makefile.* - *.def (module definition files) - etc. - pngtest.png - etc. - zlib - README, *.h, *.c contrib, etc. - -If the line endings in the files look funny, you may wish to get the other -distribution of libpng. It is available in both tar.gz (UNIX style line -endings) and zip (DOS style line endings) formats. - -VI. Building with project files - -If you are building libpng with MSVC, you can enter the -libpng projects\visualc71 or vstudio directory and follow the instructions -in README.txt. - -Otherwise enter the zlib directory and follow the instructions in zlib/README, -then come back here and run "configure" or choose the appropriate -makefile.sys in the scripts directory. - -VII. Building with makefiles - -Copy the file (or files) that you need from the -scripts directory into this directory, for example - -MSDOS example: - - copy scripts\makefile.msc makefile - copy scripts\pnglibconf.h.prebuilt pnglibconf.h - -UNIX example: - - cp scripts/makefile.std makefile - cp scripts/pnglibconf.h.prebuilt pnglibconf.h - -Read the makefile to see if you need to change any source or -target directories to match your preferences. - -Then read pnglibconf.dfa to see if you want to make any configuration -changes. - -Then just run "make" which will create the libpng library in -this directory and "make test" which will run a quick test that reads -the "pngtest.png" file and writes a "pngout.png" file that should be -identical to it. Look for "9782 zero samples" in the output of the -test. For more confidence, you can run another test by typing -"pngtest pngnow.png" and looking for "289 zero samples" in the output. -Also, you can run "pngtest -m contrib/pngsuite/*.png" and compare -your output with the result shown in contrib/pngsuite/README. - -Most of the makefiles will allow you to run "make install" to -put the library in its final resting place (if you want to -do that, run "make install" in the zlib directory first if necessary). -Some also allow you to run "make test-installed" after you have -run "make install". - -VIII. Configuring libpng for 16-bit platforms - -You will want to look into zconf.h to tell zlib (and thus libpng) that -it cannot allocate more than 64K at a time. Even if you can, the memory -won't be accessible. So limit zlib and libpng to 64K by defining MAXSEG_64K. - -IX. Configuring for DOS - -For DOS users who only have access to the lower 640K, you will -have to limit zlib's memory usage via a png_set_compression_mem_level() -call. See zlib.h or zconf.h in the zlib library for more information. - -X. Configuring for Medium Model - -Libpng's support for medium model has been tested on most of the popular -compilers. Make sure MAXSEG_64K gets defined, USE_FAR_KEYWORD gets -defined, and FAR gets defined to far in pngconf.h, and you should be -all set. Everything in the library (except for zlib's structure) is -expecting far data. You must use the typedefs with the p or pp on -the end for pointers (or at least look at them and be careful). Make -note that the rows of data are defined as png_bytepp, which is -an "unsigned char far * far *". - -XI. Prepending a prefix to exported symbols - -Starting with libpng-1.6.0, you can configure libpng (when using the -"configure" script) to prefix all exported symbols by means of the -configuration option "--with-libpng-prefix=FOO_", where FOO_ can be any -string beginning with a letter and containing only uppercase -and lowercase letters, digits, and the underscore (i.e., a C language -identifier). This creates a set of macros in pnglibconf.h, so this is -transparent to applications; their function calls get transformed by -the macros to use the modified names. - -XII. Configuring for compiler xxx: - -All includes for libpng are in pngconf.h. If you need to add, change -or delete an include, this is the place to do it. -The includes that are not needed outside libpng are placed in pngpriv.h, -which is only used by the routines inside libpng itself. -The files in libpng proper only include pngpriv.h and png.h, which -in turn includes pngconf.h and, as of libpng-1.5.0, pnglibconf.h. -As of libpng-1.5.0, pngpriv.h also includes three other private header -files, pngstruct.h, pnginfo.h, and pngdebug.h, which contain material -that previously appeared in the public headers. - -XIII. Removing unwanted object code - -There are a bunch of #define's in pngconf.h that control what parts of -libpng are compiled. All the defines end in _SUPPORTED. If you are -never going to use a capability, you can change the #define to #undef -before recompiling libpng and save yourself code and data space, or -you can turn off individual capabilities with defines that begin with -"PNG_NO_". - -In libpng-1.5.0 and later, the #define's are in pnglibconf.h instead. - -You can also turn all of the transforms and ancillary chunk capabilities -off en masse with compiler directives that define -PNG_NO_READ[or WRITE]_TRANSFORMS, or PNG_NO_READ[or WRITE]_ANCILLARY_CHUNKS, -or all four, along with directives to turn on any of the capabilities that -you do want. The PNG_NO_READ[or WRITE]_TRANSFORMS directives disable the -extra transformations but still leave the library fully capable of reading -and writing PNG files with all known public chunks. Use of the -PNG_NO_READ[or WRITE]_ANCILLARY_CHUNKS directive produces a library -that is incapable of reading or writing ancillary chunks. If you are -not using the progressive reading capability, you can turn that off -with PNG_NO_PROGRESSIVE_READ (don't confuse this with the INTERLACING -capability, which you'll still have). - -All the reading and writing specific code are in separate files, so the -linker should only grab the files it needs. However, if you want to -make sure, or if you are building a stand alone library, all the -reading files start with "pngr" and all the writing files start with "pngw". -The files that don't match either (like png.c, pngtrans.c, etc.) -are used for both reading and writing, and always need to be included. -The progressive reader is in pngpread.c - -If you are creating or distributing a dynamically linked library (a .so -or DLL file), you should not remove or disable any parts of the library, -as this will cause applications linked with different versions of the -library to fail if they call functions not available in your library. -The size of the library itself should not be an issue, because only -those sections that are actually used will be loaded into memory. - -XIV. Enabling or disabling hardware optimizations - -Certain hardware capabilities, such as the Intel SSE instructions, -are normally detected at run time. Enable them with configure options -such as one of - - --enable-arm-neon=yes - --enable-mips-msa=yes - --enable-intel-sse=yes - --enable-powerpc-vsx=yes - -or enable them all at once with - - --enable-hardware-optimizations=yes - -or, if you are not using "configure", you can use one -or more of - - CPPFLAGS += "-DPNG_ARM_NEON" - CPPFLAGS += "-DPNG_MIPS_MSA" - CPPFLAGS += "-DPNG_INTEL_SSE" - CPPFLAGS += "-DPNG_POWERPC_VSX" - -See for example scripts/makefile.linux-opt - -If you wish to avoid using them, -you can disable them via the configure option - - --disable-hardware-optimizations - -to disable them all, or - - --enable-intel-sse=no - -to disable a particular one, -or via compiler-command options such as - - CPPFLAGS += "-DPNG_ARM_NEON_OPT=0, -DPNG_MIPS_MSA_OPT=0, - -DPNG_INTEL_SSE_OPT=0, -DPNG_POWERPC_VSX_OPT=0" - -If you are using cmake, hardware optimizations are "on" -by default. To disable them, use - - cmake . -DPNG_ARM_NEON=no -DPNG_INTEL_SSE=no \ - -DPNG_MIPS_MSA=no -DPNG_POWERPC_VSX=no - -or disable them all at once with - - cmake . -DPNG_HARDWARE_OPTIMIZATIONS=no - -XV. Changes to the build and configuration of libpng in libpng-1.5.x - -Details of internal changes to the library code can be found in the CHANGES -file and in the GIT repository logs. These will be of no concern to the vast -majority of library users or builders; however, the few who configure libpng -to a non-default feature set may need to change how this is done. - -There should be no need for library builders to alter build scripts if -these use the distributed build support - configure or the makefiles - -however, users of the makefiles may care to update their build scripts -to build pnglibconf.h where the corresponding makefile does not do so. - -Building libpng with a non-default configuration has changed completely. -The old method using pngusr.h should still work correctly even though the -way pngusr.h is used in the build has been changed; however, library -builders will probably want to examine the changes to take advantage of -new capabilities and to simplify their build system. - -A. Specific changes to library configuration capabilities - -The exact mechanism used to control attributes of API functions has -changed. A single set of operating system independent macro definitions -is used and operating system specific directives are defined in -pnglibconf.h - -As part of this the mechanism used to choose procedure call standards on -those systems that allow a choice has been changed. At present this only -affects certain Microsoft (DOS, Windows) and IBM (OS/2) operating systems -running on Intel processors. As before, PNGAPI is defined where required -to control the exported API functions; however, two new macros, PNGCBAPI -and PNGCAPI, are used instead for callback functions (PNGCBAPI) and -(PNGCAPI) for functions that must match a C library prototype (currently -only png_longjmp_ptr, which must match the C longjmp function.) The new -approach is documented in pngconf.h - -Despite these changes, libpng 1.5.0 only supports the native C function -calling standard on those platforms tested so far ("__cdecl" on Microsoft -Windows). This is because the support requirements for alternative -calling conventions seem to no longer exist. Developers who find it -necessary to set PNG_API_RULE to 1 should advise the mailing list -(png-mng-implement) of this and library builders who use Openwatcom and -therefore set PNG_API_RULE to 2 should also contact the mailing list. - -B. Changes to the configuration mechanism - -Prior to libpng-1.5.0 library builders who needed to configure libpng -had either to modify the exported pngconf.h header file to add system -specific configuration or had to write feature selection macros into -pngusr.h and cause this to be included into pngconf.h by defining -PNG_USER_CONFIG. The latter mechanism had the disadvantage that an -application built without PNG_USER_CONFIG defined would see the -unmodified, default, libpng API and thus would probably fail to link. - -These mechanisms still work in the configure build and in any makefile -build that builds pnglibconf.h, although the feature selection macros -have changed somewhat as described above. In 1.5.0, however, pngusr.h is -processed only once, at the time the exported header file pnglibconf.h is -built. pngconf.h no longer includes pngusr.h; therefore, pngusr.h is ignored -after the build of pnglibconf.h and it is never included in an application -build. - -The formerly used alternative of adding a list of feature macros to the -CPPFLAGS setting in the build also still works; however, the macros will be -copied to pnglibconf.h and this may produce macro redefinition warnings -when the individual C files are compiled. - -All configuration now only works if pnglibconf.h is built from -scripts/pnglibconf.dfa. This requires the program awk. Brian Kernighan -(the original author of awk) maintains C source code of that awk and this -and all known later implementations (often called by subtly different -names - nawk and gawk for example) are adequate to build pnglibconf.h. -The Sun Microsystems (now Oracle) program 'awk' is an earlier version -and does not work; this may also apply to other systems that have a -functioning awk called 'nawk'. - -Configuration options are now documented in scripts/pnglibconf.dfa. This -file also includes dependency information that ensures a configuration is -consistent; that is, if a feature is switched off, dependent features are -also switched off. As a recommended alternative to using feature macros in -pngusr.h a system builder may also define equivalent options in pngusr.dfa -(or, indeed, any file) and add that to the configuration by setting -DFA_XTRA to the file name. The makefiles in contrib/pngminim illustrate -how to do this, and also illustrate a case where pngusr.h is still required. - -After you have built libpng, the definitions that were recorded in -pnglibconf.h are available to your application (pnglibconf.h is included -in png.h and gets installed alongside png.h and pngconf.h in your -$PREFIX/include directory). Do not edit pnglibconf.h after you have built -libpng, because than the settings would not accurately reflect the settings -that were used to build libpng. - -XVI. Setjmp/longjmp issues - -Libpng uses setjmp()/longjmp() for error handling. Unfortunately setjmp() -is known to be not thread-safe on some platforms and we don't know of -any platform where it is guaranteed to be thread-safe. Therefore, if -your application is going to be using multiple threads, you should -configure libpng with PNG_NO_SETJMP in your pngusr.dfa file, with --DPNG_NO_SETJMP on your compile line, or with - - #undef PNG_SETJMP_SUPPORTED - -in your pnglibconf.h or pngusr.h. - -Starting with libpng-1.6.0, the library included a "simplified API". -This requires setjmp/longjmp, so you must either build the library -with PNG_SETJMP_SUPPORTED defined, or with PNG_SIMPLIFIED_READ_SUPPORTED -and PNG_SIMPLIFIED_WRITE_SUPPORTED undefined. - -XVII. Common linking failures - -If your application fails to find libpng or zlib entries while linking: - - Be sure "-lz" appears after "-lpng" on your linking command. - - Be sure you have built libpng, zlib, and your application for the - same platform (e.g., 32-bit or 64-bit). - - If you are using the vstudio project, observe the WARNING in - project/vstudio/README.txt. - -XVIII. Other sources of information about libpng: - -Further information can be found in the README and libpng-manual.txt -files, in the individual makefiles, in png.h, and the manual pages -libpng.3 and png.5. - -Copyright (c) 1998-2002,2006-2016 Glenn Randers-Pehrson -This document is released under the libpng license. -For conditions of distribution and use, see the disclaimer -and license in png.h. diff --git a/lib/libpng-1.6.37/LICENSE b/lib/libpng-1.6.37/LICENSE deleted file mode 100644 index e0c5b53..0000000 --- a/lib/libpng-1.6.37/LICENSE +++ /dev/null @@ -1,134 +0,0 @@ -COPYRIGHT NOTICE, DISCLAIMER, and LICENSE -========================================= - -PNG Reference Library License version 2 ---------------------------------------- - - * Copyright (c) 1995-2019 The PNG Reference Library Authors. - * Copyright (c) 2018-2019 Cosmin Truta. - * Copyright (c) 2000-2002, 2004, 2006-2018 Glenn Randers-Pehrson. - * Copyright (c) 1996-1997 Andreas Dilger. - * Copyright (c) 1995-1996 Guy Eric Schalnat, Group 42, Inc. - -The software is supplied "as is", without warranty of any kind, -express or implied, including, without limitation, the warranties -of merchantability, fitness for a particular purpose, title, and -non-infringement. In no event shall the Copyright owners, or -anyone distributing the software, be liable for any damages or -other liability, whether in contract, tort or otherwise, arising -from, out of, or in connection with the software, or the use or -other dealings in the software, even if advised of the possibility -of such damage. - -Permission is hereby granted to use, copy, modify, and distribute -this software, or portions hereof, for any purpose, without fee, -subject to the following restrictions: - - 1. The origin of this software must not be misrepresented; you - must not claim that you wrote the original software. If you - use this software in a product, an acknowledgment in the product - documentation would be appreciated, but is not required. - - 2. Altered source versions must be plainly marked as such, and must - not be misrepresented as being the original software. - - 3. This Copyright notice may not be removed or altered from any - source or altered source distribution. - - -PNG Reference Library License version 1 (for libpng 0.5 through 1.6.35) ------------------------------------------------------------------------ - -libpng versions 1.0.7, July 1, 2000, through 1.6.35, July 15, 2018 are -Copyright (c) 2000-2002, 2004, 2006-2018 Glenn Randers-Pehrson, are -derived from libpng-1.0.6, and are distributed according to the same -disclaimer and license as libpng-1.0.6 with the following individuals -added to the list of Contributing Authors: - - Simon-Pierre Cadieux - Eric S. Raymond - Mans Rullgard - Cosmin Truta - Gilles Vollant - James Yu - Mandar Sahastrabuddhe - Google Inc. - Vadim Barkov - -and with the following additions to the disclaimer: - - There is no warranty against interference with your enjoyment of - the library or against infringement. There is no warranty that our - efforts or the library will fulfill any of your particular purposes - or needs. This library is provided with all faults, and the entire - risk of satisfactory quality, performance, accuracy, and effort is - with the user. - -Some files in the "contrib" directory and some configure-generated -files that are distributed with libpng have other copyright owners, and -are released under other open source licenses. - -libpng versions 0.97, January 1998, through 1.0.6, March 20, 2000, are -Copyright (c) 1998-2000 Glenn Randers-Pehrson, are derived from -libpng-0.96, and are distributed according to the same disclaimer and -license as libpng-0.96, with the following individuals added to the -list of Contributing Authors: - - Tom Lane - Glenn Randers-Pehrson - Willem van Schaik - -libpng versions 0.89, June 1996, through 0.96, May 1997, are -Copyright (c) 1996-1997 Andreas Dilger, are derived from libpng-0.88, -and are distributed according to the same disclaimer and license as -libpng-0.88, with the following individuals added to the list of -Contributing Authors: - - John Bowler - Kevin Bracey - Sam Bushell - Magnus Holmgren - Greg Roelofs - Tom Tanner - -Some files in the "scripts" directory have other copyright owners, -but are released under this license. - -libpng versions 0.5, May 1995, through 0.88, January 1996, are -Copyright (c) 1995-1996 Guy Eric Schalnat, Group 42, Inc. - -For the purposes of this copyright and license, "Contributing Authors" -is defined as the following set of individuals: - - Andreas Dilger - Dave Martindale - Guy Eric Schalnat - Paul Schmidt - Tim Wegner - -The PNG Reference Library is supplied "AS IS". The Contributing -Authors and Group 42, Inc. disclaim all warranties, expressed or -implied, including, without limitation, the warranties of -merchantability and of fitness for any purpose. The Contributing -Authors and Group 42, Inc. assume no liability for direct, indirect, -incidental, special, exemplary, or consequential damages, which may -result from the use of the PNG Reference Library, even if advised of -the possibility of such damage. - -Permission is hereby granted to use, copy, modify, and distribute this -source code, or portions hereof, for any purpose, without fee, subject -to the following restrictions: - - 1. The origin of this source code must not be misrepresented. - - 2. Altered versions must be plainly marked as such and must not - be misrepresented as being the original source. - - 3. This Copyright notice may not be removed or altered from any - source or altered source distribution. - -The Contributing Authors and Group 42, Inc. specifically permit, -without fee, and encourage the use of this source code as a component -to supporting the PNG file format in commercial products. If you use -this source code in a product, acknowledgment is not required but would -be appreciated. diff --git a/lib/libpng-1.6.37/Makefile.am b/lib/libpng-1.6.37/Makefile.am deleted file mode 100644 index 4f621aa..0000000 --- a/lib/libpng-1.6.37/Makefile.am +++ /dev/null @@ -1,393 +0,0 @@ -# Makefile.am, the source file for Makefile.in (and hence Makefile), is -# -# Copyright (c) 2018 Cosmin Truta -# Copyright (c) 2004-2016 Glenn Randers-Pehrson -# -# This code is released under the libpng license. -# For conditions of distribution and use, see the disclaimer -# and license in png.h - -PNGLIB_BASENAME= libpng@PNGLIB_MAJOR@@PNGLIB_MINOR@ - -ACLOCAL_AMFLAGS = -I scripts - -# test programs - run on make check, make distcheck -check_PROGRAMS= pngtest pngunknown pngstest pngvalid pngimage pngcp -if HAVE_CLOCK_GETTIME -check_PROGRAMS += timepng -endif - -# Utilities - installed -bin_PROGRAMS= pngfix png-fix-itxt - -# This ensures that pnglibconf.h gets built at the start of 'make all' or -# 'make check', but it does not add dependencies to the individual programs, -# this is done below. -# -# IMPORTANT: always add the object modules of new programs to the list below -# because otherwise the sequence 'configure; make new-program' will *sometimes* -# result in the installed (system) pnglibconf.h being used and the result is -# always wrong and always very confusing. -BUILT_SOURCES = pnglibconf.h - -pngtest_SOURCES = pngtest.c -pngtest_LDADD = libpng@PNGLIB_MAJOR@@PNGLIB_MINOR@.la - -pngvalid_SOURCES = contrib/libtests/pngvalid.c -pngvalid_LDADD = libpng@PNGLIB_MAJOR@@PNGLIB_MINOR@.la - -pngstest_SOURCES = contrib/libtests/pngstest.c -pngstest_LDADD = libpng@PNGLIB_MAJOR@@PNGLIB_MINOR@.la - -pngunknown_SOURCES = contrib/libtests/pngunknown.c -pngunknown_LDADD = libpng@PNGLIB_MAJOR@@PNGLIB_MINOR@.la - -pngimage_SOURCES = contrib/libtests/pngimage.c -pngimage_LDADD = libpng@PNGLIB_MAJOR@@PNGLIB_MINOR@.la - -timepng_SOURCES = contrib/libtests/timepng.c -timepng_LDADD = libpng@PNGLIB_MAJOR@@PNGLIB_MINOR@.la - -pngfix_SOURCES = contrib/tools/pngfix.c -pngfix_LDADD = libpng@PNGLIB_MAJOR@@PNGLIB_MINOR@.la - -png_fix_itxt_SOURCES = contrib/tools/png-fix-itxt.c - -pngcp_SOURCES = contrib/tools/pngcp.c -pngcp_LDADD = libpng@PNGLIB_MAJOR@@PNGLIB_MINOR@.la - -# Generally these are single line shell scripts to run a test with a particular -# set of parameters: -TESTS =\ - tests/pngtest\ - tests/pngtest-badpngs\ - tests/pngvalid-gamma-16-to-8 tests/pngvalid-gamma-alpha-mode\ - tests/pngvalid-gamma-background tests/pngvalid-gamma-expand16-alpha-mode\ - tests/pngvalid-gamma-expand16-background\ - tests/pngvalid-gamma-expand16-transform tests/pngvalid-gamma-sbit\ - tests/pngvalid-gamma-threshold tests/pngvalid-gamma-transform\ - tests/pngvalid-progressive-size\ - tests/pngvalid-progressive-interlace-standard\ - tests/pngvalid-transform\ - tests/pngvalid-progressive-standard tests/pngvalid-standard\ - tests/pngstest-1.8 tests/pngstest-1.8-alpha tests/pngstest-linear\ - tests/pngstest-linear-alpha tests/pngstest-none tests/pngstest-none-alpha\ - tests/pngstest-sRGB tests/pngstest-sRGB-alpha tests/pngunknown-IDAT\ - tests/pngunknown-discard tests/pngunknown-if-safe tests/pngunknown-sAPI\ - tests/pngunknown-sTER tests/pngunknown-save tests/pngunknown-vpAg\ - tests/pngimage-quick tests/pngimage-full - -# man pages -dist_man_MANS= libpng.3 libpngpf.3 png.5 - -# generate the -config scripts if required -binconfigs= libpng@PNGLIB_MAJOR@@PNGLIB_MINOR@-config -EXTRA_SCRIPTS= libpng-config libpng@PNGLIB_MAJOR@@PNGLIB_MINOR@-config -bin_SCRIPTS= @binconfigs@ - -# rules to build libpng, only build the old library on request -lib_LTLIBRARIES=libpng@PNGLIB_MAJOR@@PNGLIB_MINOR@.la -# EXTRA_LTLIBRARIES= libpng.la -libpng@PNGLIB_MAJOR@@PNGLIB_MINOR@_la_SOURCES = png.c pngerror.c\ - pngget.c pngmem.c pngpread.c pngread.c pngrio.c pngrtran.c pngrutil.c\ - pngset.c pngtrans.c pngwio.c pngwrite.c pngwtran.c pngwutil.c\ - png.h pngconf.h pngdebug.h pnginfo.h pngpriv.h pngstruct.h pngusr.dfa - -if PNG_ARM_NEON -libpng@PNGLIB_MAJOR@@PNGLIB_MINOR@_la_SOURCES += arm/arm_init.c\ - arm/filter_neon.S arm/filter_neon_intrinsics.c \ - arm/palette_neon_intrinsics.c -endif - -if PNG_MIPS_MSA -libpng@PNGLIB_MAJOR@@PNGLIB_MINOR@_la_SOURCES += mips/mips_init.c\ - mips/filter_msa_intrinsics.c -endif - -if PNG_INTEL_SSE -libpng@PNGLIB_MAJOR@@PNGLIB_MINOR@_la_SOURCES += intel/intel_init.c\ - intel/filter_sse2_intrinsics.c -endif - -if PNG_POWERPC_VSX -libpng@PNGLIB_MAJOR@@PNGLIB_MINOR@_la_SOURCES += powerpc/powerpc_init.c\ - powerpc/filter_vsx_intrinsics.c -endif - -nodist_libpng@PNGLIB_MAJOR@@PNGLIB_MINOR@_la_SOURCES = pnglibconf.h - -libpng@PNGLIB_MAJOR@@PNGLIB_MINOR@_la_LDFLAGS = -no-undefined -export-dynamic \ - -version-number @PNGLIB_MAJOR@@PNGLIB_MINOR@:@PNGLIB_RELEASE@:0 - -if HAVE_LD_VERSION_SCRIPT -# Versioned symbols and restricted exports -if HAVE_SOLARIS_LD - libpng@PNGLIB_MAJOR@@PNGLIB_MINOR@_la_LDFLAGS += -Wl,-M -Wl,libpng.vers -else - libpng@PNGLIB_MAJOR@@PNGLIB_MINOR@_la_LDFLAGS += -Wl,--version-script=libpng.vers -endif - - libpng@PNGLIB_MAJOR@@PNGLIB_MINOR@_la_DEPENDENCIES = libpng.vers -else -# Only restricted exports when possible - libpng@PNGLIB_MAJOR@@PNGLIB_MINOR@_la_LDFLAGS += -export-symbols libpng.sym - libpng@PNGLIB_MAJOR@@PNGLIB_MINOR@_la_DEPENDENCIES = libpng.sym -endif - -#distribute headers in /usr/include/libpng/* -pkgincludedir= $(includedir)/$(PNGLIB_BASENAME) -pkginclude_HEADERS= png.h pngconf.h -nodist_pkginclude_HEADERS= pnglibconf.h - -# pkg-config stuff, note that libpng.pc is always required in order -# to get the correct library -pkgconfigdir = @pkgconfigdir@ -pkgconfig_DATA = libpng@PNGLIB_MAJOR@@PNGLIB_MINOR@.pc - -# Extra source distribution files, '${srcdir}' is used below to stop build files -# from those directories being included. 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It used to, but some change either in libpng or configure stopped this -# working. -all-am: $(check_PROGRAMS) - -# Tell versions [3.59,3.63) of GNU make to not export all variables. -# Otherwise a system limit (for SysV at least) may be exceeded. -.NOEXPORT: diff --git a/lib/libpng-1.6.37/README b/lib/libpng-1.6.37/README deleted file mode 100644 index cfc1f0e..0000000 --- a/lib/libpng-1.6.37/README +++ /dev/null @@ -1,183 +0,0 @@ -README for libpng version 1.6.37 - April 14, 2019 -================================================= - -See the note about version numbers near the top of png.h. -See INSTALL for instructions on how to install libpng. - -Libpng comes in several distribution formats. Get libpng-*.tar.gz or -libpng-*.tar.xz or if you want UNIX-style line endings in the text -files, or lpng*.7z or lpng*.zip if you want DOS-style line endings. - -Version 0.89 was the first official release of libpng. Don't let the -fact that it's the first release fool you. The libpng library has been -in extensive use and testing since mid-1995. By late 1997 it had -finally gotten to the stage where there hadn't been significant -changes to the API in some time, and people have a bad feeling about -libraries with versions < 1.0. Version 1.0.0 was released in -March 1998. - -**** -Note that some of the changes to the png_info structure render this -version of the library binary incompatible with libpng-0.89 or -earlier versions if you are using a shared library. The type of the -"filler" parameter for png_set_filler() has changed from png_byte to -png_uint_32, which will affect shared-library applications that use -this function. - -To avoid problems with changes to the internals of the png info_struct, -new APIs have been made available in 0.95 to avoid direct application -access to info_ptr. These functions are the png_set_ and -png_get_ functions. These functions should be used when -accessing/storing the info_struct data, rather than manipulating it -directly, to avoid such problems in the future. - -It is important to note that the APIs did not make current programs -that access the info struct directly incompatible with the new -library, through libpng-1.2.x. In libpng-1.4.x, which was meant to -be a transitional release, members of the png_struct and the -info_struct can still be accessed, but the compiler will issue a -warning about deprecated usage. Since libpng-1.5.0, direct access -to these structs is not allowed, and the definitions of the structs -reside in private pngstruct.h and pnginfo.h header files that are not -accessible to applications. It is strongly suggested that new -programs use the new APIs (as shown in example.c and pngtest.c), and -older programs be converted to the new format, to facilitate upgrades -in the future. -**** - -Additions since 0.90 include the ability to compile libpng as a -Windows DLL, and new APIs for accessing data in the info struct. -Experimental functions include the ability to set weighting and cost -factors for row filter selection, direct reads of integers from buffers -on big-endian processors that support misaligned data access, faster -methods of doing alpha composition, and more accurate 16->8 bit color -conversion. - -The additions since 0.89 include the ability to read from a PNG stream -which has had some (or all) of the signature bytes read by the calling -application. This also allows the reading of embedded PNG streams that -do not have the PNG file signature. As well, it is now possible to set -the library action on the detection of chunk CRC errors. It is possible -to set different actions based on whether the CRC error occurred in a -critical or an ancillary chunk. - -For a detailed description on using libpng, read libpng-manual.txt. -For examples of libpng in a program, see example.c and pngtest.c. For -usage information and restrictions (what little they are) on libpng, -see png.h. For a description on using zlib (the compression library -used by libpng) and zlib's restrictions, see zlib.h - -I have included a general makefile, as well as several machine and -compiler specific ones, but you may have to modify one for your own -needs. - -You should use zlib 1.0.4 or later to run this, but it MAY work with -versions as old as zlib 0.95. Even so, there are bugs in older zlib -versions which can cause the output of invalid compression streams for -some images. - -You should also note that zlib is a compression library that is useful -for more things than just PNG files. You can use zlib as a drop-in -replacement for fread() and fwrite(), if you are so inclined. - -zlib should be available at the same place that libpng is, or at -https://zlib.net. - -You may also want a copy of the PNG specification. It is available -as an RFC, a W3C Recommendation, and an ISO/IEC Standard. You can find -these at http://www.libpng.org/pub/png/pngdocs.html . - -This code is currently being archived at libpng.sourceforge.io in the -[DOWNLOAD] area, and at http://libpng.download/src . - -This release, based in a large way on Glenn's, Guy's and Andreas' -earlier work, was created and will be supported by myself and the PNG -development group. - -Send comments/corrections/commendations to png-mng-implement at -lists.sourceforge.net (subscription required; visit -https://lists.sourceforge.net/lists/listinfo/png-mng-implement -to subscribe). - -Send general questions about the PNG specification to png-mng-misc -at lists.sourceforge.net (subscription required; visit -https://lists.sourceforge.net/lists/listinfo/png-mng-misc to -subscribe). - -Files in this distribution: - - ANNOUNCE => Announcement of this version, with recent changes - AUTHORS => List of contributing authors - CHANGES => Description of changes between libpng versions - KNOWNBUG => List of known bugs and deficiencies - LICENSE => License to use and redistribute libpng - README => This file - TODO => Things not implemented in the current library - TRADEMARK => Trademark information - example.c => Example code for using libpng functions - libpng.3 => manual page for libpng (includes libpng-manual.txt) - libpng-manual.txt => Description of libpng and its functions - libpngpf.3 => manual page for libpng's private functions - png.5 => manual page for the PNG format - png.c => Basic interface functions common to library - png.h => Library function and interface declarations (public) - pngpriv.h => Library function and interface declarations (private) - pngconf.h => System specific library configuration (public) - pngstruct.h => png_struct declaration (private) - pnginfo.h => png_info struct declaration (private) - pngdebug.h => debugging macros (private) - pngerror.c => Error/warning message I/O functions - pngget.c => Functions for retrieving info from struct - pngmem.c => Memory handling functions - pngbar.png => PNG logo, 88x31 - pngnow.png => PNG logo, 98x31 - pngpread.c => Progressive reading functions - pngread.c => Read data/helper high-level functions - pngrio.c => Lowest-level data read I/O functions - pngrtran.c => Read data transformation functions - pngrutil.c => Read data utility functions - pngset.c => Functions for storing data into the info_struct - pngtest.c => Library test program - pngtest.png => Library test sample image - pngtrans.c => Common data transformation functions - pngwio.c => Lowest-level write I/O functions - pngwrite.c => High-level write functions - pngwtran.c => Write data transformations - pngwutil.c => Write utility functions - arm => Contains optimized code for the ARM platform - powerpc => Contains optimized code for the PowerPC platform - contrib => Contributions - arm-neon => Optimized code for ARM-NEON platform - powerpc-vsx => Optimized code for POWERPC-VSX platform - examples => Example programs - gregbook => source code for PNG reading and writing, from - Greg Roelofs' "PNG: The Definitive Guide", - O'Reilly, 1999 - libtests => Test programs - mips-msa => Optimized code for MIPS-MSA platform - pngminim => Minimal decoder, encoder, and progressive decoder - programs demonstrating use of pngusr.dfa - pngminus => Simple pnm2png and png2pnm programs - pngsuite => Test images - testpngs - tools => Various tools - visupng => Contains a MSVC workspace for VisualPng - intel => Optimized code for INTEL-SSE2 platform - mips => Optimized code for MIPS platform - projects => Contains project files and workspaces for - building a DLL - owatcom => Contains a WATCOM project for building libpng - visualc71 => Contains a Microsoft Visual C++ (MSVC) - workspace for building libpng and zlib - vstudio => Contains a Microsoft Visual C++ (MSVC) - workspace for building libpng and zlib - scripts => Directory containing scripts for building libpng: - (see scripts/README.txt for the list of scripts) - -Good luck, and happy coding! - - * Cosmin Truta (current maintainer, since 2018) - * Glenn Randers-Pehrson (former maintainer, 1998-2018) - * Andreas Eric Dilger (former maintainer, 1996-1997) - * Guy Eric Schalnat (original author and former maintainer, 1995-1996) - (formerly of Group 42, Inc.) diff --git a/lib/libpng-1.6.37/TODO b/lib/libpng-1.6.37/TODO deleted file mode 100644 index 562dab0..0000000 --- a/lib/libpng-1.6.37/TODO +++ /dev/null @@ -1,23 +0,0 @@ -TODO - list of things to do for libpng: - -* Fix all defects (duh!) -* Better C++ wrapper / full C++ implementation (?) -* Fix the problems with C++ and 'extern "C"'. -* cHRM transformation. -* Palette creation. -* "grayscale->palette" transformation and "palette->grayscale" detection. -* Improved dithering. -* Multi-lingual error and warning message support. -* Complete sRGB transformation. (Currently it simply uses gamma=0.45455.) -* Man pages for function calls. -* Better documentation. -* Better filter selection - (e.g., counting huffman bits/precompression; filter inertia; filter costs). -* Histogram creation. -* Text conversion between different code pages (e.g., Latin-1 -> Mac). -* Avoid building gamma tables whenever possible. -* Greater precision in changing to linear gamma for compositing against - background, and in doing rgb-to-gray transformations. -* Investigate pre-incremented loop counters and other loop constructions. -* Interpolated method of handling interlacing. -* More validations for libpng transformations. diff --git a/lib/libpng-1.6.37/TRADEMARK b/lib/libpng-1.6.37/TRADEMARK deleted file mode 100644 index ac66718..0000000 --- a/lib/libpng-1.6.37/TRADEMARK +++ /dev/null @@ -1,8 +0,0 @@ -TRADEMARK -========= - -The name "libpng" has not been registered by the Copyright owners -as a trademark in any jurisdiction. 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In the case of the ARM - * NEON instructions there is no processor-specific way of detecting the - * presence of the required support, therefore run-time detection is extremely - * OS specific. - * - * You may set the macro PNG_ARM_NEON_FILE to the file name of file containing - * a fragment of C source code which defines the png_have_neon function. There - * are a number of implementations in contrib/arm-neon, but the only one that - * has partial support is contrib/arm-neon/linux.c - a generic Linux - * implementation which reads /proc/cpufino. - */ -#ifndef PNG_ARM_NEON_FILE -# ifdef __linux__ -# define PNG_ARM_NEON_FILE "contrib/arm-neon/linux.c" -# endif -#endif - -#ifdef PNG_ARM_NEON_FILE - -#include /* for sig_atomic_t */ -static int png_have_neon(png_structp png_ptr); -#include PNG_ARM_NEON_FILE - -#else /* PNG_ARM_NEON_FILE */ -# error "PNG_ARM_NEON_FILE undefined: no support for run-time ARM NEON checks" -#endif /* PNG_ARM_NEON_FILE */ -#endif /* PNG_ARM_NEON_CHECK_SUPPORTED */ - -#ifndef PNG_ALIGNED_MEMORY_SUPPORTED -# error "ALIGNED_MEMORY is required; set: -DPNG_ALIGNED_MEMORY_SUPPORTED" -#endif - -void -png_init_filter_functions_neon(png_structp pp, unsigned int bpp) -{ - /* The switch statement is compiled in for ARM_NEON_API, the call to - * png_have_neon is compiled in for ARM_NEON_CHECK. If both are defined - * the check is only performed if the API has not set the NEON option on - * or off explicitly. In this case the check controls what happens. - * - * If the CHECK is not compiled in and the option is UNSET the behavior prior - * to 1.6.7 was to use the NEON code - this was a bug caused by having the - * wrong order of the 'ON' and 'default' cases. UNSET now defaults to OFF, - * as documented in png.h - */ - png_debug(1, "in png_init_filter_functions_neon"); -#ifdef PNG_ARM_NEON_API_SUPPORTED - switch ((pp->options >> PNG_ARM_NEON) & 3) - { - case PNG_OPTION_UNSET: - /* Allow the run-time check to execute if it has been enabled - - * thus both API and CHECK can be turned on. If it isn't supported - * this case will fall through to the 'default' below, which just - * returns. - */ -#endif /* PNG_ARM_NEON_API_SUPPORTED */ -#ifdef PNG_ARM_NEON_CHECK_SUPPORTED - { - static volatile sig_atomic_t no_neon = -1; /* not checked */ - - if (no_neon < 0) - no_neon = !png_have_neon(pp); - - if (no_neon) - return; - } -#ifdef PNG_ARM_NEON_API_SUPPORTED - break; -#endif -#endif /* PNG_ARM_NEON_CHECK_SUPPORTED */ - -#ifdef PNG_ARM_NEON_API_SUPPORTED - default: /* OFF or INVALID */ - return; - - case PNG_OPTION_ON: - /* Option turned on */ - break; - } -#endif - - /* IMPORTANT: any new external functions used here must be declared using - * PNG_INTERNAL_FUNCTION in ../pngpriv.h. This is required so that the - * 'prefix' option to configure works: - * - * ./configure --with-libpng-prefix=foobar_ - * - * Verify you have got this right by running the above command, doing a build - * and examining pngprefix.h; it must contain a #define for every external - * function you add. (Notice that this happens automatically for the - * initialization function.) - */ - pp->read_filter[PNG_FILTER_VALUE_UP-1] = png_read_filter_row_up_neon; - - if (bpp == 3) - { - pp->read_filter[PNG_FILTER_VALUE_SUB-1] = png_read_filter_row_sub3_neon; - pp->read_filter[PNG_FILTER_VALUE_AVG-1] = png_read_filter_row_avg3_neon; - pp->read_filter[PNG_FILTER_VALUE_PAETH-1] = - png_read_filter_row_paeth3_neon; - } - - else if (bpp == 4) - { - pp->read_filter[PNG_FILTER_VALUE_SUB-1] = png_read_filter_row_sub4_neon; - pp->read_filter[PNG_FILTER_VALUE_AVG-1] = png_read_filter_row_avg4_neon; - pp->read_filter[PNG_FILTER_VALUE_PAETH-1] = - png_read_filter_row_paeth4_neon; - } -} -#endif /* PNG_ARM_NEON_OPT > 0 */ -#endif /* READ */ diff --git a/lib/libpng-1.6.37/arm/filter_neon.S b/lib/libpng-1.6.37/arm/filter_neon.S deleted file mode 100644 index 2308aad..0000000 --- a/lib/libpng-1.6.37/arm/filter_neon.S +++ /dev/null @@ -1,253 +0,0 @@ - -/* filter_neon.S - NEON optimised filter functions - * - * Copyright (c) 2018 Cosmin Truta - * Copyright (c) 2014,2017 Glenn Randers-Pehrson - * Written by Mans Rullgard, 2011. - * - * This code is released under the libpng license. - * For conditions of distribution and use, see the disclaimer - * and license in png.h - */ - -/* This is required to get the symbol renames, which are #defines, and the - * definitions (or not) of PNG_ARM_NEON_OPT and PNG_ARM_NEON_IMPLEMENTATION. - */ -#define PNG_VERSION_INFO_ONLY -#include "../pngpriv.h" - -#if (defined(__linux__) || defined(__FreeBSD__)) && defined(__ELF__) -.section .note.GNU-stack,"",%progbits /* mark stack as non-executable */ -#endif - -#ifdef PNG_READ_SUPPORTED - -/* Assembler NEON support - only works for 32-bit ARM (i.e. it does not work for - * ARM64). The code in arm/filter_neon_intrinsics.c supports ARM64, however it - * only works if -mfpu=neon is specified on the GCC command line. See pngpriv.h - * for the logic which sets PNG_USE_ARM_NEON_ASM: - */ -#if PNG_ARM_NEON_IMPLEMENTATION == 2 /* hand-coded assembler */ - -#if PNG_ARM_NEON_OPT > 0 - -#ifdef __ELF__ -# define ELF -#else -# define ELF @ -#endif - - .arch armv7-a - .fpu neon - -.macro func name, export=0 - .macro endfunc -ELF .size \name, . - \name - .endfunc - .purgem endfunc - .endm - .text - - /* Explicitly specifying alignment here because some versions of - * GAS don't align code correctly. This is harmless in correctly - * written versions of GAS. - */ - .align 2 - - .if \export - .global \name - .endif -ELF .type \name, STT_FUNC - .func \name -\name: -.endm - -func png_read_filter_row_sub4_neon, export=1 - ldr r3, [r0, #4] @ rowbytes - vmov.i8 d3, #0 -1: - vld4.32 {d4[],d5[],d6[],d7[]}, [r1,:128] - vadd.u8 d0, d3, d4 - vadd.u8 d1, d0, d5 - vadd.u8 d2, d1, d6 - vadd.u8 d3, d2, d7 - vst4.32 {d0[0],d1[0],d2[0],d3[0]},[r1,:128]! - subs r3, r3, #16 - bgt 1b - - bx lr -endfunc - -func png_read_filter_row_sub3_neon, export=1 - ldr r3, [r0, #4] @ rowbytes - vmov.i8 d3, #0 - mov r0, r1 - mov r2, #3 - mov r12, #12 - vld1.8 {q11}, [r0], r12 -1: - vext.8 d5, d22, d23, #3 - vadd.u8 d0, d3, d22 - vext.8 d6, d22, d23, #6 - vadd.u8 d1, d0, d5 - vext.8 d7, d23, d23, #1 - vld1.8 {q11}, [r0], r12 - vst1.32 {d0[0]}, [r1,:32], r2 - vadd.u8 d2, d1, d6 - vst1.32 {d1[0]}, [r1], r2 - vadd.u8 d3, d2, d7 - vst1.32 {d2[0]}, [r1], r2 - vst1.32 {d3[0]}, [r1], r2 - subs r3, r3, #12 - bgt 1b - - bx lr -endfunc - -func png_read_filter_row_up_neon, export=1 - ldr r3, [r0, #4] @ rowbytes -1: - vld1.8 {q0}, [r1,:128] - vld1.8 {q1}, [r2,:128]! - vadd.u8 q0, q0, q1 - vst1.8 {q0}, [r1,:128]! - subs r3, r3, #16 - bgt 1b - - bx lr -endfunc - -func png_read_filter_row_avg4_neon, export=1 - ldr r12, [r0, #4] @ rowbytes - vmov.i8 d3, #0 -1: - vld4.32 {d4[],d5[],d6[],d7[]}, [r1,:128] - vld4.32 {d16[],d17[],d18[],d19[]},[r2,:128]! - vhadd.u8 d0, d3, d16 - vadd.u8 d0, d0, d4 - vhadd.u8 d1, d0, d17 - vadd.u8 d1, d1, d5 - vhadd.u8 d2, d1, d18 - vadd.u8 d2, d2, d6 - vhadd.u8 d3, d2, d19 - vadd.u8 d3, d3, d7 - vst4.32 {d0[0],d1[0],d2[0],d3[0]},[r1,:128]! - subs r12, r12, #16 - bgt 1b - - bx lr -endfunc - -func png_read_filter_row_avg3_neon, export=1 - push {r4,lr} - ldr r12, [r0, #4] @ rowbytes - vmov.i8 d3, #0 - mov r0, r1 - mov r4, #3 - mov lr, #12 - vld1.8 {q11}, [r0], lr -1: - vld1.8 {q10}, [r2], lr - vext.8 d5, d22, d23, #3 - vhadd.u8 d0, d3, d20 - vext.8 d17, d20, d21, #3 - vadd.u8 d0, d0, d22 - vext.8 d6, d22, d23, #6 - vhadd.u8 d1, d0, d17 - vext.8 d18, d20, d21, #6 - vadd.u8 d1, d1, d5 - vext.8 d7, d23, d23, #1 - vld1.8 {q11}, [r0], lr - vst1.32 {d0[0]}, [r1,:32], r4 - vhadd.u8 d2, d1, d18 - vst1.32 {d1[0]}, [r1], r4 - vext.8 d19, d21, d21, #1 - vadd.u8 d2, d2, d6 - vhadd.u8 d3, d2, d19 - vst1.32 {d2[0]}, [r1], r4 - vadd.u8 d3, d3, d7 - vst1.32 {d3[0]}, [r1], r4 - subs r12, r12, #12 - bgt 1b - - pop {r4,pc} -endfunc - -.macro paeth rx, ra, rb, rc - vaddl.u8 q12, \ra, \rb @ a + b - vaddl.u8 q15, \rc, \rc @ 2*c - vabdl.u8 q13, \rb, \rc @ pa - vabdl.u8 q14, \ra, \rc @ pb - vabd.u16 q15, q12, q15 @ pc - vcle.u16 q12, q13, q14 @ pa <= pb - vcle.u16 q13, q13, q15 @ pa <= pc - vcle.u16 q14, q14, q15 @ pb <= pc - vand q12, q12, q13 @ pa <= pb && pa <= pc - vmovn.u16 d28, q14 - vmovn.u16 \rx, q12 - vbsl d28, \rb, \rc - vbsl \rx, \ra, d28 -.endm - -func png_read_filter_row_paeth4_neon, export=1 - ldr r12, [r0, #4] @ rowbytes - vmov.i8 d3, #0 - vmov.i8 d20, #0 -1: - vld4.32 {d4[],d5[],d6[],d7[]}, [r1,:128] - vld4.32 {d16[],d17[],d18[],d19[]},[r2,:128]! - paeth d0, d3, d16, d20 - vadd.u8 d0, d0, d4 - paeth d1, d0, d17, d16 - vadd.u8 d1, d1, d5 - paeth d2, d1, d18, d17 - vadd.u8 d2, d2, d6 - paeth d3, d2, d19, d18 - vmov d20, d19 - vadd.u8 d3, d3, d7 - vst4.32 {d0[0],d1[0],d2[0],d3[0]},[r1,:128]! - subs r12, r12, #16 - bgt 1b - - bx lr -endfunc - -func png_read_filter_row_paeth3_neon, export=1 - push {r4,lr} - ldr r12, [r0, #4] @ rowbytes - vmov.i8 d3, #0 - vmov.i8 d4, #0 - mov r0, r1 - mov r4, #3 - mov lr, #12 - vld1.8 {q11}, [r0], lr -1: - vld1.8 {q10}, [r2], lr - paeth d0, d3, d20, d4 - vext.8 d5, d22, d23, #3 - vadd.u8 d0, d0, d22 - vext.8 d17, d20, d21, #3 - paeth d1, d0, d17, d20 - vst1.32 {d0[0]}, [r1,:32], r4 - vext.8 d6, d22, d23, #6 - vadd.u8 d1, d1, d5 - vext.8 d18, d20, d21, #6 - paeth d2, d1, d18, d17 - vext.8 d7, d23, d23, #1 - vld1.8 {q11}, [r0], lr - vst1.32 {d1[0]}, [r1], r4 - vadd.u8 d2, d2, d6 - vext.8 d19, d21, d21, #1 - paeth d3, d2, d19, d18 - vst1.32 {d2[0]}, [r1], r4 - vmov d4, d19 - vadd.u8 d3, d3, d7 - vst1.32 {d3[0]}, [r1], r4 - subs r12, r12, #12 - bgt 1b - - pop {r4,pc} -endfunc -#endif /* PNG_ARM_NEON_OPT > 0 */ -#endif /* PNG_ARM_NEON_IMPLEMENTATION == 2 (assembler) */ -#endif /* READ */ diff --git a/lib/libpng-1.6.37/arm/filter_neon_intrinsics.c b/lib/libpng-1.6.37/arm/filter_neon_intrinsics.c deleted file mode 100644 index 553c0be..0000000 --- a/lib/libpng-1.6.37/arm/filter_neon_intrinsics.c +++ /dev/null @@ -1,402 +0,0 @@ - -/* filter_neon_intrinsics.c - NEON optimised filter functions - * - * Copyright (c) 2018 Cosmin Truta - * Copyright (c) 2014,2016 Glenn Randers-Pehrson - * Written by James Yu , October 2013. - * Based on filter_neon.S, written by Mans Rullgard, 2011. - * - * This code is released under the libpng license. - * For conditions of distribution and use, see the disclaimer - * and license in png.h - */ - -#include "../pngpriv.h" - -#ifdef PNG_READ_SUPPORTED - -/* This code requires -mfpu=neon on the command line: */ -#if PNG_ARM_NEON_IMPLEMENTATION == 1 /* intrinsics code from pngpriv.h */ - -#if defined(_MSC_VER) && defined(_M_ARM64) -# include -#else -# include -#endif - -/* libpng row pointers are not necessarily aligned to any particular boundary, - * however this code will only work with appropriate alignment. arm/arm_init.c - * checks for this (and will not compile unless it is done). This code uses - * variants of png_aligncast to avoid compiler warnings. - */ -#define png_ptr(type,pointer) png_aligncast(type *,pointer) -#define png_ptrc(type,pointer) png_aligncastconst(const type *,pointer) - -/* The following relies on a variable 'temp_pointer' being declared with type - * 'type'. This is written this way just to hide the GCC strict aliasing - * warning; note that the code is safe because there never is an alias between - * the input and output pointers. - * - * When compiling with MSVC ARM64, the png_ldr macro can't be passed directly - * to vst4_lane_u32, because of an internal compiler error inside MSVC. - * To avoid this compiler bug, we use a temporary variable (vdest_val) to store - * the result of png_ldr. - */ -#define png_ldr(type,pointer)\ - (temp_pointer = png_ptr(type,pointer), *temp_pointer) - -#if PNG_ARM_NEON_OPT > 0 - -void -png_read_filter_row_up_neon(png_row_infop row_info, png_bytep row, - png_const_bytep prev_row) -{ - png_bytep rp = row; - png_bytep rp_stop = row + row_info->rowbytes; - png_const_bytep pp = prev_row; - - png_debug(1, "in png_read_filter_row_up_neon"); - - for (; rp < rp_stop; rp += 16, pp += 16) - { - uint8x16_t qrp, qpp; - - qrp = vld1q_u8(rp); - qpp = vld1q_u8(pp); - qrp = vaddq_u8(qrp, qpp); - vst1q_u8(rp, qrp); - } -} - -void -png_read_filter_row_sub3_neon(png_row_infop row_info, png_bytep row, - png_const_bytep prev_row) -{ - png_bytep rp = row; - png_bytep rp_stop = row + row_info->rowbytes; - - uint8x16_t vtmp = vld1q_u8(rp); - uint8x8x2_t *vrpt = png_ptr(uint8x8x2_t, &vtmp); - uint8x8x2_t vrp = *vrpt; - - uint8x8x4_t vdest; - vdest.val[3] = vdup_n_u8(0); - - png_debug(1, "in png_read_filter_row_sub3_neon"); - - for (; rp < rp_stop;) - { - uint8x8_t vtmp1, vtmp2; - uint32x2_t *temp_pointer; - - vtmp1 = vext_u8(vrp.val[0], vrp.val[1], 3); - vdest.val[0] = vadd_u8(vdest.val[3], vrp.val[0]); - vtmp2 = vext_u8(vrp.val[0], vrp.val[1], 6); - vdest.val[1] = vadd_u8(vdest.val[0], vtmp1); - - vtmp1 = vext_u8(vrp.val[1], vrp.val[1], 1); - vdest.val[2] = vadd_u8(vdest.val[1], vtmp2); - vdest.val[3] = vadd_u8(vdest.val[2], vtmp1); - - vtmp = vld1q_u8(rp + 12); - vrpt = png_ptr(uint8x8x2_t, &vtmp); - vrp = *vrpt; - - vst1_lane_u32(png_ptr(uint32_t,rp), png_ldr(uint32x2_t,&vdest.val[0]), 0); - rp += 3; - vst1_lane_u32(png_ptr(uint32_t,rp), png_ldr(uint32x2_t,&vdest.val[1]), 0); - rp += 3; - vst1_lane_u32(png_ptr(uint32_t,rp), png_ldr(uint32x2_t,&vdest.val[2]), 0); - rp += 3; - vst1_lane_u32(png_ptr(uint32_t,rp), png_ldr(uint32x2_t,&vdest.val[3]), 0); - rp += 3; - } - - PNG_UNUSED(prev_row) -} - -void -png_read_filter_row_sub4_neon(png_row_infop row_info, png_bytep row, - png_const_bytep prev_row) -{ - png_bytep rp = row; - png_bytep rp_stop = row + row_info->rowbytes; - - uint8x8x4_t vdest; - vdest.val[3] = vdup_n_u8(0); - - png_debug(1, "in png_read_filter_row_sub4_neon"); - - for (; rp < rp_stop; rp += 16) - { - uint32x2x4_t vtmp = vld4_u32(png_ptr(uint32_t,rp)); - uint8x8x4_t *vrpt = png_ptr(uint8x8x4_t,&vtmp); - uint8x8x4_t vrp = *vrpt; - uint32x2x4_t *temp_pointer; - uint32x2x4_t vdest_val; - - vdest.val[0] = vadd_u8(vdest.val[3], vrp.val[0]); - vdest.val[1] = vadd_u8(vdest.val[0], vrp.val[1]); - vdest.val[2] = vadd_u8(vdest.val[1], vrp.val[2]); - vdest.val[3] = vadd_u8(vdest.val[2], vrp.val[3]); - - vdest_val = png_ldr(uint32x2x4_t, &vdest); - vst4_lane_u32(png_ptr(uint32_t,rp), vdest_val, 0); - } - - PNG_UNUSED(prev_row) -} - -void -png_read_filter_row_avg3_neon(png_row_infop row_info, png_bytep row, - png_const_bytep prev_row) -{ - png_bytep rp = row; - png_const_bytep pp = prev_row; - png_bytep rp_stop = row + row_info->rowbytes; - - uint8x16_t vtmp; - uint8x8x2_t *vrpt; - uint8x8x2_t vrp; - uint8x8x4_t vdest; - vdest.val[3] = vdup_n_u8(0); - - vtmp = vld1q_u8(rp); - vrpt = png_ptr(uint8x8x2_t,&vtmp); - vrp = *vrpt; - - png_debug(1, "in png_read_filter_row_avg3_neon"); - - for (; rp < rp_stop; pp += 12) - { - uint8x8_t vtmp1, vtmp2, vtmp3; - - uint8x8x2_t *vppt; - uint8x8x2_t vpp; - - uint32x2_t *temp_pointer; - - vtmp = vld1q_u8(pp); - vppt = png_ptr(uint8x8x2_t,&vtmp); - vpp = *vppt; - - vtmp1 = vext_u8(vrp.val[0], vrp.val[1], 3); - vdest.val[0] = vhadd_u8(vdest.val[3], vpp.val[0]); - vdest.val[0] = vadd_u8(vdest.val[0], vrp.val[0]); - - vtmp2 = vext_u8(vpp.val[0], vpp.val[1], 3); - vtmp3 = vext_u8(vrp.val[0], vrp.val[1], 6); - vdest.val[1] = vhadd_u8(vdest.val[0], vtmp2); - vdest.val[1] = vadd_u8(vdest.val[1], vtmp1); - - vtmp2 = vext_u8(vpp.val[0], vpp.val[1], 6); - vtmp1 = vext_u8(vrp.val[1], vrp.val[1], 1); - - vtmp = vld1q_u8(rp + 12); - vrpt = png_ptr(uint8x8x2_t,&vtmp); - vrp = *vrpt; - - vdest.val[2] = vhadd_u8(vdest.val[1], vtmp2); - vdest.val[2] = vadd_u8(vdest.val[2], vtmp3); - - vtmp2 = vext_u8(vpp.val[1], vpp.val[1], 1); - - vdest.val[3] = vhadd_u8(vdest.val[2], vtmp2); - vdest.val[3] = vadd_u8(vdest.val[3], vtmp1); - - vst1_lane_u32(png_ptr(uint32_t,rp), png_ldr(uint32x2_t,&vdest.val[0]), 0); - rp += 3; - vst1_lane_u32(png_ptr(uint32_t,rp), png_ldr(uint32x2_t,&vdest.val[1]), 0); - rp += 3; - vst1_lane_u32(png_ptr(uint32_t,rp), png_ldr(uint32x2_t,&vdest.val[2]), 0); - rp += 3; - vst1_lane_u32(png_ptr(uint32_t,rp), png_ldr(uint32x2_t,&vdest.val[3]), 0); - rp += 3; - } -} - -void -png_read_filter_row_avg4_neon(png_row_infop row_info, png_bytep row, - png_const_bytep prev_row) -{ - png_bytep rp = row; - png_bytep rp_stop = row + row_info->rowbytes; - png_const_bytep pp = prev_row; - - uint8x8x4_t vdest; - vdest.val[3] = vdup_n_u8(0); - - png_debug(1, "in png_read_filter_row_avg4_neon"); - - for (; rp < rp_stop; rp += 16, pp += 16) - { - uint32x2x4_t vtmp; - uint8x8x4_t *vrpt, *vppt; - uint8x8x4_t vrp, vpp; - uint32x2x4_t *temp_pointer; - uint32x2x4_t vdest_val; - - vtmp = vld4_u32(png_ptr(uint32_t,rp)); - vrpt = png_ptr(uint8x8x4_t,&vtmp); - vrp = *vrpt; - vtmp = vld4_u32(png_ptrc(uint32_t,pp)); - vppt = png_ptr(uint8x8x4_t,&vtmp); - vpp = *vppt; - - vdest.val[0] = vhadd_u8(vdest.val[3], vpp.val[0]); - vdest.val[0] = vadd_u8(vdest.val[0], vrp.val[0]); - vdest.val[1] = vhadd_u8(vdest.val[0], vpp.val[1]); - vdest.val[1] = vadd_u8(vdest.val[1], vrp.val[1]); - vdest.val[2] = vhadd_u8(vdest.val[1], vpp.val[2]); - vdest.val[2] = vadd_u8(vdest.val[2], vrp.val[2]); - vdest.val[3] = vhadd_u8(vdest.val[2], vpp.val[3]); - vdest.val[3] = vadd_u8(vdest.val[3], vrp.val[3]); - - vdest_val = png_ldr(uint32x2x4_t, &vdest); - vst4_lane_u32(png_ptr(uint32_t,rp), vdest_val, 0); - } -} - -static uint8x8_t -paeth(uint8x8_t a, uint8x8_t b, uint8x8_t c) -{ - uint8x8_t d, e; - uint16x8_t p1, pa, pb, pc; - - p1 = vaddl_u8(a, b); /* a + b */ - pc = vaddl_u8(c, c); /* c * 2 */ - pa = vabdl_u8(b, c); /* pa */ - pb = vabdl_u8(a, c); /* pb */ - pc = vabdq_u16(p1, pc); /* pc */ - - p1 = vcleq_u16(pa, pb); /* pa <= pb */ - pa = vcleq_u16(pa, pc); /* pa <= pc */ - pb = vcleq_u16(pb, pc); /* pb <= pc */ - - p1 = vandq_u16(p1, pa); /* pa <= pb && pa <= pc */ - - d = vmovn_u16(pb); - e = vmovn_u16(p1); - - d = vbsl_u8(d, b, c); - e = vbsl_u8(e, a, d); - - return e; -} - -void -png_read_filter_row_paeth3_neon(png_row_infop row_info, png_bytep row, - png_const_bytep prev_row) -{ - png_bytep rp = row; - png_const_bytep pp = prev_row; - png_bytep rp_stop = row + row_info->rowbytes; - - uint8x16_t vtmp; - uint8x8x2_t *vrpt; - uint8x8x2_t vrp; - uint8x8_t vlast = vdup_n_u8(0); - uint8x8x4_t vdest; - vdest.val[3] = vdup_n_u8(0); - - vtmp = vld1q_u8(rp); - vrpt = png_ptr(uint8x8x2_t,&vtmp); - vrp = *vrpt; - - png_debug(1, "in png_read_filter_row_paeth3_neon"); - - for (; rp < rp_stop; pp += 12) - { - uint8x8x2_t *vppt; - uint8x8x2_t vpp; - uint8x8_t vtmp1, vtmp2, vtmp3; - uint32x2_t *temp_pointer; - - vtmp = vld1q_u8(pp); - vppt = png_ptr(uint8x8x2_t,&vtmp); - vpp = *vppt; - - vdest.val[0] = paeth(vdest.val[3], vpp.val[0], vlast); - vdest.val[0] = vadd_u8(vdest.val[0], vrp.val[0]); - - vtmp1 = vext_u8(vrp.val[0], vrp.val[1], 3); - vtmp2 = vext_u8(vpp.val[0], vpp.val[1], 3); - vdest.val[1] = paeth(vdest.val[0], vtmp2, vpp.val[0]); - vdest.val[1] = vadd_u8(vdest.val[1], vtmp1); - - vtmp1 = vext_u8(vrp.val[0], vrp.val[1], 6); - vtmp3 = vext_u8(vpp.val[0], vpp.val[1], 6); - vdest.val[2] = paeth(vdest.val[1], vtmp3, vtmp2); - vdest.val[2] = vadd_u8(vdest.val[2], vtmp1); - - vtmp1 = vext_u8(vrp.val[1], vrp.val[1], 1); - vtmp2 = vext_u8(vpp.val[1], vpp.val[1], 1); - - vtmp = vld1q_u8(rp + 12); - vrpt = png_ptr(uint8x8x2_t,&vtmp); - vrp = *vrpt; - - vdest.val[3] = paeth(vdest.val[2], vtmp2, vtmp3); - vdest.val[3] = vadd_u8(vdest.val[3], vtmp1); - - vlast = vtmp2; - - vst1_lane_u32(png_ptr(uint32_t,rp), png_ldr(uint32x2_t,&vdest.val[0]), 0); - rp += 3; - vst1_lane_u32(png_ptr(uint32_t,rp), png_ldr(uint32x2_t,&vdest.val[1]), 0); - rp += 3; - vst1_lane_u32(png_ptr(uint32_t,rp), png_ldr(uint32x2_t,&vdest.val[2]), 0); - rp += 3; - vst1_lane_u32(png_ptr(uint32_t,rp), png_ldr(uint32x2_t,&vdest.val[3]), 0); - rp += 3; - } -} - -void -png_read_filter_row_paeth4_neon(png_row_infop row_info, png_bytep row, - png_const_bytep prev_row) -{ - png_bytep rp = row; - png_bytep rp_stop = row + row_info->rowbytes; - png_const_bytep pp = prev_row; - - uint8x8_t vlast = vdup_n_u8(0); - uint8x8x4_t vdest; - vdest.val[3] = vdup_n_u8(0); - - png_debug(1, "in png_read_filter_row_paeth4_neon"); - - for (; rp < rp_stop; rp += 16, pp += 16) - { - uint32x2x4_t vtmp; - uint8x8x4_t *vrpt, *vppt; - uint8x8x4_t vrp, vpp; - uint32x2x4_t *temp_pointer; - uint32x2x4_t vdest_val; - - vtmp = vld4_u32(png_ptr(uint32_t,rp)); - vrpt = png_ptr(uint8x8x4_t,&vtmp); - vrp = *vrpt; - vtmp = vld4_u32(png_ptrc(uint32_t,pp)); - vppt = png_ptr(uint8x8x4_t,&vtmp); - vpp = *vppt; - - vdest.val[0] = paeth(vdest.val[3], vpp.val[0], vlast); - vdest.val[0] = vadd_u8(vdest.val[0], vrp.val[0]); - vdest.val[1] = paeth(vdest.val[0], vpp.val[1], vpp.val[0]); - vdest.val[1] = vadd_u8(vdest.val[1], vrp.val[1]); - vdest.val[2] = paeth(vdest.val[1], vpp.val[2], vpp.val[1]); - vdest.val[2] = vadd_u8(vdest.val[2], vrp.val[2]); - vdest.val[3] = paeth(vdest.val[2], vpp.val[3], vpp.val[2]); - vdest.val[3] = vadd_u8(vdest.val[3], vrp.val[3]); - - vlast = vpp.val[3]; - - vdest_val = png_ldr(uint32x2x4_t, &vdest); - vst4_lane_u32(png_ptr(uint32_t,rp), vdest_val, 0); - } -} - -#endif /* PNG_ARM_NEON_OPT > 0 */ -#endif /* PNG_ARM_NEON_IMPLEMENTATION == 1 (intrinsics) */ -#endif /* READ */ diff --git a/lib/libpng-1.6.37/arm/palette_neon_intrinsics.c b/lib/libpng-1.6.37/arm/palette_neon_intrinsics.c deleted file mode 100644 index b4d1fd2..0000000 --- a/lib/libpng-1.6.37/arm/palette_neon_intrinsics.c +++ /dev/null @@ -1,149 +0,0 @@ - -/* palette_neon_intrinsics.c - NEON optimised palette expansion functions - * - * Copyright (c) 2018-2019 Cosmin Truta - * Copyright (c) 2017-2018 Arm Holdings. All rights reserved. - * Written by Richard Townsend , February 2017. - * - * This code is released under the libpng license. - * For conditions of distribution and use, see the disclaimer - * and license in png.h - */ - -#include "../pngpriv.h" - -#if PNG_ARM_NEON_IMPLEMENTATION == 1 - -#if defined(_MSC_VER) && defined(_M_ARM64) -# include -#else -# include -#endif - -/* Build an RGBA8 palette from the separate RGB and alpha palettes. */ -void -png_riffle_palette_neon(png_structrp png_ptr) -{ - png_const_colorp palette = png_ptr->palette; - png_bytep riffled_palette = png_ptr->riffled_palette; - png_const_bytep trans_alpha = png_ptr->trans_alpha; - int num_trans = png_ptr->num_trans; - int i; - - png_debug(1, "in png_riffle_palette_neon"); - - /* Initially black, opaque. */ - uint8x16x4_t w = {{ - vdupq_n_u8(0x00), - vdupq_n_u8(0x00), - vdupq_n_u8(0x00), - vdupq_n_u8(0xff), - }}; - - /* First, riffle the RGB colours into an RGBA8 palette. - * The alpha component is set to opaque for now. - */ - for (i = 0; i < 256; i += 16) - { - uint8x16x3_t v = vld3q_u8((png_const_bytep)(palette + i)); - w.val[0] = v.val[0]; - w.val[1] = v.val[1]; - w.val[2] = v.val[2]; - vst4q_u8(riffled_palette + (i << 2), w); - } - - /* Fix up the missing transparency values. */ - for (i = 0; i < num_trans; i++) - riffled_palette[(i << 2) + 3] = trans_alpha[i]; -} - -/* Expands a palettized row into RGBA8. */ -int -png_do_expand_palette_rgba8_neon(png_structrp png_ptr, png_row_infop row_info, - png_const_bytep row, png_bytepp ssp, png_bytepp ddp) -{ - png_uint_32 row_width = row_info->width; - const png_uint_32 *riffled_palette = - (const png_uint_32 *)png_ptr->riffled_palette; - const png_int_32 pixels_per_chunk = 4; - int i; - - png_debug(1, "in png_do_expand_palette_rgba8_neon"); - - if (row_width < pixels_per_chunk) - return 0; - - /* This function originally gets the last byte of the output row. - * The NEON part writes forward from a given position, so we have - * to seek this back by 4 pixels x 4 bytes. - */ - *ddp = *ddp - ((pixels_per_chunk * sizeof(png_uint_32)) - 1); - - for (i = 0; i < row_width; i += pixels_per_chunk) - { - uint32x4_t cur; - png_bytep sp = *ssp - i, dp = *ddp - (i << 2); - cur = vld1q_dup_u32 (riffled_palette + *(sp - 3)); - cur = vld1q_lane_u32(riffled_palette + *(sp - 2), cur, 1); - cur = vld1q_lane_u32(riffled_palette + *(sp - 1), cur, 2); - cur = vld1q_lane_u32(riffled_palette + *(sp - 0), cur, 3); - vst1q_u32((void *)dp, cur); - } - if (i != row_width) - { - /* Remove the amount that wasn't processed. */ - i -= pixels_per_chunk; - } - - /* Decrement output pointers. */ - *ssp = *ssp - i; - *ddp = *ddp - (i << 2); - return i; -} - -/* Expands a palettized row into RGB8. */ -int -png_do_expand_palette_rgb8_neon(png_structrp png_ptr, png_row_infop row_info, - png_const_bytep row, png_bytepp ssp, png_bytepp ddp) -{ - png_uint_32 row_width = row_info->width; - png_const_bytep palette = (png_const_bytep)png_ptr->palette; - const png_uint_32 pixels_per_chunk = 8; - int i; - - png_debug(1, "in png_do_expand_palette_rgb8_neon"); - - if (row_width <= pixels_per_chunk) - return 0; - - /* Seeking this back by 8 pixels x 3 bytes. */ - *ddp = *ddp - ((pixels_per_chunk * sizeof(png_color)) - 1); - - for (i = 0; i < row_width; i += pixels_per_chunk) - { - uint8x8x3_t cur; - png_bytep sp = *ssp - i, dp = *ddp - ((i << 1) + i); - cur = vld3_dup_u8(palette + sizeof(png_color) * (*(sp - 7))); - cur = vld3_lane_u8(palette + sizeof(png_color) * (*(sp - 6)), cur, 1); - cur = vld3_lane_u8(palette + sizeof(png_color) * (*(sp - 5)), cur, 2); - cur = vld3_lane_u8(palette + sizeof(png_color) * (*(sp - 4)), cur, 3); - cur = vld3_lane_u8(palette + sizeof(png_color) * (*(sp - 3)), cur, 4); - cur = vld3_lane_u8(palette + sizeof(png_color) * (*(sp - 2)), cur, 5); - cur = vld3_lane_u8(palette + sizeof(png_color) * (*(sp - 1)), cur, 6); - cur = vld3_lane_u8(palette + sizeof(png_color) * (*(sp - 0)), cur, 7); - vst3_u8((void *)dp, cur); - } - - if (i != row_width) - { - /* Remove the amount that wasn't processed. */ - i -= pixels_per_chunk; - } - - /* Decrement output pointers. */ - *ssp = *ssp - i; - *ddp = *ddp - ((i << 1) + i); - return i; -} - -#endif /* PNG_ARM_NEON_IMPLEMENTATION */ diff --git a/lib/libpng-1.6.37/autogen.sh b/lib/libpng-1.6.37/autogen.sh deleted file mode 100755 index a46daf6..0000000 --- a/lib/libpng-1.6.37/autogen.sh +++ /dev/null @@ -1,225 +0,0 @@ -#! /bin/sh -# -# Run 'autoreconf' to build 'configure', 'Makefile.in' and other configure -# control files. -# -# The first time this is run on a GIT checkout the only files that exist are -# configure.ac and Makefile.am; all of the autotools support scripts are -# missing. They are instantiated with autoreconf --force --install. -# -# For regular ("tarball") distributions all the files should exist. We do not -# want them to be updated *under any circumstances*. It should never be -# necessary to run autogen.sh because ./configure --enable-maintainer-mode says -# what to do if Makefile.am or configure.ac are changed. -# -# It is *probably* OK to update the files on a GIT checkout, because they have -# come from the local tools, but leave that to the user who is assumed to know -# whether it is ok or required. -# -# This script is intended to work without arguments, there are, however, hidden -# arguments (a) for use while testing the script and (b) to fix up systems that -# have been broken. If (b) is required the script prompts for the correct -# options. For this reason the options are *NOT* documented in the help; this -# is deliberate; UTSL. -# -clean= -maintainer= -while test $# -gt 0 -do - case "$1" in - --maintainer) - maintainer=1;; - - --clean) - clean=1;; - - *) - exec >&2 - echo "$0: usage: ./autogen.sh" - if test -d .git - then - echo " ./autogen.sh generates the configure script and" - echo " Makefile.in, or refreshes them after changes to Makefile.am" - echo " or configure.ac. You may prefer to just run autoreconf." - elif test -z "$maintainer" - then - echo " DO NOT RUN THIS SCRIPT." - echo " If you need to change Makefile.am or configure.ac then you" - echo " also need to run ./configure --enable-maintainer-mode and" - echo " use the appropriate autotools, *NOT* this script, to update" - echo " everything, please check the documentation of autoreconf." - echo " WARNING: libpng is intentionally generated with a known," - echo " fixed, set of autotools. It is known *NOT* to work with" - echo " the collection of autotools distributed on highly reputable" - echo " operating systems." - echo " Remember: autotools is GNU software, you are expected to" - echo " pay for support." - else - echo " You have run autogen.sh with --maintainer enabled and you" - echo " are not using a GIT distribution, then you have given an" - echo " unrecognized argument. This is not good. --maintainer" - echo " switches off any assumptions that you might not know what" - echo " you are doing." - fi - exit 1;; - esac - - shift -done -# -# First check for a set of the autotools files; if absent then this is assumed -# to be a GIT version and the local autotools must be used. If present this -# is a tarball distribution and the script should not be used. If partially -# present bad things are happening. -# -# The autotools generated files: -libpng_autotools_files="Makefile.in aclocal.m4 config.guess config.h.in - config.sub configure depcomp install-sh ltmain.sh missing\ - test-driver" -# -# Files generated by versions of configue >2.68 or automake >1.13 (i.e. later -# versions than those required by configure.ac): -libpng_autotools_extra="compile config.h.in~" -# -# These are separate because 'maintainer-clean' does not remove them. -libpng_libtool_files="scripts/libtool.m4 scripts/ltoptions.m4\ - scripts/ltsugar.m4 scripts/ltversion.m4 scripts/lt~obsolete.m4" - -libpng_autotools_dirs="autom4te.cache" # not required -# -# The configure generated files: -libpng_configure_files="Makefile config.h config.log config.status\ - libpng-config libpng.pc libtool stamp-h1" - -libpng_configure_dirs=".deps" -# -# We must remove the configure generated files as well as the autotools -# generated files if autotools are regenerated because otherwise if configure -# has been run without "--enable-maintainer-mode" make can do a partial update -# of Makefile. These functions do the two bits of cleaning. -clean_autotools(){ - rm -rf $libpng_autotools_files $libpng_libtool_files $libpng_autotools_dirs - rm -rf $libpng_autotools_extra -} - -clean_configure(){ - rm -rf $libpng_configure_files $libpng_configure_dirs -} -# -# Clean: remove everything (this is to help with testing) -if test -n "$clean" -then - clean_configure - if test -n "$maintainer" - then - clean_autotools - fi - - exit 0 -fi -# -# Validate the distribution. -libpng_autotools_file_found= -libpng_autotools_file_missing= -for file in $libpng_autotools_files -do - if test -f "$file" - then - libpng_autotools_file_found=1 - else - libpng_autotools_file_missing=1 - fi -done -# -# Presence of one of these does not *invalidate* missing, but absence -# invalidates found. -for file in $libpng_libtool_files -do - if test ! -f "$file" - then - libpng_autotools_file_missing=1 - fi -done -# -# The cache directory doesn't matter - it will be regenerated and does not exist -# anyway in a tarball. -# -# Either everything is missing or everything is there, the --maintainer option -# just changes this so that the mode is set to generate all the files. -mode= -if test -z "$libpng_autotools_file_found" -o -n "$maintainer" -then - mode="autoreconf" -else - if test -n "$libpng_autotools_file_missing" - then - mode="broken" - else - mode="configure" - fi -fi -# -# So: -case "$mode" in - autoreconf) - # Clean in case configure files exist - clean_configure - clean_autotools - # Everything must be initialized, so use --force - if autoreconf --warnings=all --force --install - then - missing= - for file in $libpng_autotools_files - do - test -f "$file" || missing=1 - done - # ignore the cache directory - test -z "$missing" || { - exec >&2 - echo "autoreconf was run, but did not produce all the expected" - echo "files. It is likely that your autotools installation is" - echo "not compatible with that expected by libpng." - exit 1 - } - else - exec >&2 - echo "autoreconf failed: your version of autotools is incompatible" - echo "with this libpng version. Please use a distributed archive" - echo "(which includes the autotools generated files) and run configure" - echo "instead." - exit 1 - fi;; - - configure) - if test -d .git - then - exec >&2 - echo "ERROR: running autoreconf on an initialized system" - echo " This is not necessary; it is only necessary to remake the" - echo " autotools generated files if Makefile.am or configure.ac" - echo " change and make does the right thing with:" - echo - echo " ./configure --enable-maintainer-mode." - echo - echo " You can run autoreconf yourself if you don't like maintainer" - echo " mode and you can also just run autoreconf -f -i to initialize" - echo " everything in the first place; this script is only for" - echo " compatibility with prior releases." - exit 1 - else - exec >&2 - echo "autogen.sh is intended only to generate 'configure' on systems" - echo "that do not have it. You have a complete 'configure', if you" - echo "need to change Makefile.am or configure.ac you also need to" - echo "run configure with the --enable-maintainer-mode option." - exit 1 - fi;; - - broken) - exec >&2 - echo "Your system has a partial set of autotools generated files." - echo "autogen.sh is unable to proceed. The full set of files is" - echo "contained in the libpng 'tar' distribution archive and you do" - echo "not need to run autogen.sh if you use it." - exit 1;; -esac diff --git a/lib/libpng-1.6.37/compile b/lib/libpng-1.6.37/compile deleted file mode 100755 index 99e5052..0000000 --- a/lib/libpng-1.6.37/compile +++ /dev/null @@ -1,348 +0,0 @@ -#! /bin/sh -# Wrapper for compilers which do not understand '-c -o'. - -scriptversion=2018-03-07.03; # UTC - -# Copyright (C) 1999-2018 Free Software Foundation, Inc. -# Written by Tom Tromey . -# -# This program is free software; you can redistribute it and/or modify -# it under the terms of the GNU General Public License as published by -# the Free Software Foundation; either version 2, or (at your option) -# any later version. -# -# This program is distributed in the hope that it will be useful, -# but WITHOUT ANY WARRANTY; without even the implied warranty of -# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the -# GNU General Public License for more details. -# -# You should have received a copy of the GNU General Public License -# along with this program. If not, see . - -# As a special exception to the GNU General Public License, if you -# distribute this file as part of a program that contains a -# configuration script generated by Autoconf, you may include it under -# the same distribution terms that you use for the rest of that program. - -# This file is maintained in Automake, please report -# bugs to or send patches to -# . - -nl=' -' - -# We need space, tab and new line, in precisely that order. Quoting is -# there to prevent tools from complaining about whitespace usage. -IFS=" "" $nl" - -file_conv= - -# func_file_conv build_file lazy -# Convert a $build file to $host form and store it in $file -# Currently only supports Windows hosts. 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But MiNT is downward compatible to TOS, so this should - # be no problem. - atarist[e]:*MiNT:*:* | atarist[e]:*mint:*:* | atarist[e]:*TOS:*:*) - echo m68k-atari-mint"$UNAME_RELEASE" - exit ;; - atari*:*MiNT:*:* | atari*:*mint:*:* | atarist[e]:*TOS:*:*) - echo m68k-atari-mint"$UNAME_RELEASE" - exit ;; - *falcon*:*MiNT:*:* | *falcon*:*mint:*:* | *falcon*:*TOS:*:*) - echo m68k-atari-mint"$UNAME_RELEASE" - exit ;; - milan*:*MiNT:*:* | milan*:*mint:*:* | *milan*:*TOS:*:*) - echo m68k-milan-mint"$UNAME_RELEASE" - exit ;; - hades*:*MiNT:*:* | hades*:*mint:*:* | *hades*:*TOS:*:*) - echo m68k-hades-mint"$UNAME_RELEASE" - exit ;; - *:*MiNT:*:* | *:*mint:*:* | *:*TOS:*:*) - echo m68k-unknown-mint"$UNAME_RELEASE" - exit ;; - m68k:machten:*:*) - echo m68k-apple-machten"$UNAME_RELEASE" - exit ;; - powerpc:machten:*:*) - echo powerpc-apple-machten"$UNAME_RELEASE" - exit ;; - RISC*:Mach:*:*) - echo mips-dec-mach_bsd4.3 - exit ;; - RISC*:ULTRIX:*:*) - echo mips-dec-ultrix"$UNAME_RELEASE" - exit ;; - VAX*:ULTRIX*:*:*) - echo vax-dec-ultrix"$UNAME_RELEASE" - exit ;; - 2020:CLIX:*:* | 2430:CLIX:*:*) - echo clipper-intergraph-clix"$UNAME_RELEASE" - exit ;; - mips:*:*:UMIPS | mips:*:*:RISCos) - eval "$set_cc_for_build" - sed 's/^ //' << EOF > "$dummy.c" -#ifdef __cplusplus -#include /* for printf() prototype */ - int main (int argc, char *argv[]) { -#else - int main (argc, argv) int argc; char *argv[]; { -#endif - #if defined (host_mips) && defined (MIPSEB) - #if defined (SYSTYPE_SYSV) - printf ("mips-mips-riscos%ssysv\\n", argv[1]); exit (0); - #endif - #if defined (SYSTYPE_SVR4) - printf ("mips-mips-riscos%ssvr4\\n", argv[1]); exit (0); - #endif - #if defined (SYSTYPE_BSD43) || defined(SYSTYPE_BSD) - printf ("mips-mips-riscos%sbsd\\n", argv[1]); exit (0); - #endif - #endif - exit (-1); - } -EOF - $CC_FOR_BUILD -o "$dummy" "$dummy.c" && - dummyarg=`echo "$UNAME_RELEASE" | sed -n 's/\([0-9]*\).*/\1/p'` && - SYSTEM_NAME=`"$dummy" "$dummyarg"` && - { echo "$SYSTEM_NAME"; exit; } - echo mips-mips-riscos"$UNAME_RELEASE" - exit ;; - Motorola:PowerMAX_OS:*:*) - echo powerpc-motorola-powermax - exit ;; - Motorola:*:4.3:PL8-*) - echo powerpc-harris-powermax - exit ;; - Night_Hawk:*:*:PowerMAX_OS | Synergy:PowerMAX_OS:*:*) - echo powerpc-harris-powermax - exit ;; - Night_Hawk:Power_UNIX:*:*) - echo powerpc-harris-powerunix - exit ;; - m88k:CX/UX:7*:*) - echo m88k-harris-cxux7 - exit ;; - m88k:*:4*:R4*) - echo m88k-motorola-sysv4 - exit ;; - m88k:*:3*:R3*) - echo m88k-motorola-sysv3 - exit ;; - AViiON:dgux:*:*) - # DG/UX returns AViiON for all architectures - UNAME_PROCESSOR=`/usr/bin/uname -p` - if [ "$UNAME_PROCESSOR" = mc88100 ] || [ "$UNAME_PROCESSOR" = mc88110 ] - then - if [ "$TARGET_BINARY_INTERFACE"x = m88kdguxelfx ] || \ - [ "$TARGET_BINARY_INTERFACE"x = x ] - then - echo m88k-dg-dgux"$UNAME_RELEASE" - else - echo m88k-dg-dguxbcs"$UNAME_RELEASE" - fi - else - echo i586-dg-dgux"$UNAME_RELEASE" - fi - exit ;; - M88*:DolphinOS:*:*) # DolphinOS (SVR3) - echo m88k-dolphin-sysv3 - exit ;; - M88*:*:R3*:*) - # Delta 88k system running SVR3 - echo m88k-motorola-sysv3 - exit ;; - XD88*:*:*:*) # Tektronix XD88 system running UTekV (SVR3) - echo m88k-tektronix-sysv3 - exit ;; - Tek43[0-9][0-9]:UTek:*:*) # Tektronix 4300 system running UTek (BSD) - echo m68k-tektronix-bsd - exit ;; - *:IRIX*:*:*) - echo mips-sgi-irix"`echo "$UNAME_RELEASE"|sed -e 's/-/_/g'`" - exit ;; - ????????:AIX?:[12].1:2) # AIX 2.2.1 or AIX 2.1.1 is RT/PC AIX. - echo romp-ibm-aix # uname -m gives an 8 hex-code CPU id - exit ;; # Note that: echo "'`uname -s`'" gives 'AIX ' - i*86:AIX:*:*) - echo i386-ibm-aix - exit ;; - ia64:AIX:*:*) - if [ -x /usr/bin/oslevel ] ; then - IBM_REV=`/usr/bin/oslevel` - else - IBM_REV="$UNAME_VERSION.$UNAME_RELEASE" - fi - echo "$UNAME_MACHINE"-ibm-aix"$IBM_REV" - exit ;; - *:AIX:2:3) - if grep bos325 /usr/include/stdio.h >/dev/null 2>&1; then - eval "$set_cc_for_build" - sed 's/^ //' << EOF > "$dummy.c" - #include - - main() - { - if (!__power_pc()) - exit(1); - puts("powerpc-ibm-aix3.2.5"); - exit(0); - } -EOF - if $CC_FOR_BUILD -o "$dummy" "$dummy.c" && SYSTEM_NAME=`"$dummy"` - then - echo "$SYSTEM_NAME" - else - echo rs6000-ibm-aix3.2.5 - fi - elif grep bos324 /usr/include/stdio.h >/dev/null 2>&1; then - echo rs6000-ibm-aix3.2.4 - else - echo rs6000-ibm-aix3.2 - fi - exit ;; - *:AIX:*:[4567]) - IBM_CPU_ID=`/usr/sbin/lsdev -C -c processor -S available | sed 1q | awk '{ print $1 }'` - if /usr/sbin/lsattr -El "$IBM_CPU_ID" | grep ' POWER' >/dev/null 2>&1; then - IBM_ARCH=rs6000 - else - IBM_ARCH=powerpc - fi - if [ -x /usr/bin/lslpp ] ; then - IBM_REV=`/usr/bin/lslpp -Lqc bos.rte.libc | - awk -F: '{ print $3 }' | sed s/[0-9]*$/0/` - else - IBM_REV="$UNAME_VERSION.$UNAME_RELEASE" - fi - echo "$IBM_ARCH"-ibm-aix"$IBM_REV" - exit ;; - *:AIX:*:*) - echo rs6000-ibm-aix - exit ;; - ibmrt:4.4BSD:*|romp-ibm:4.4BSD:*) - echo romp-ibm-bsd4.4 - exit ;; - ibmrt:*BSD:*|romp-ibm:BSD:*) # covers RT/PC BSD and - echo romp-ibm-bsd"$UNAME_RELEASE" # 4.3 with uname added to - exit ;; # report: romp-ibm BSD 4.3 - *:BOSX:*:*) - echo rs6000-bull-bosx - exit ;; - DPX/2?00:B.O.S.:*:*) - echo m68k-bull-sysv3 - exit ;; - 9000/[34]??:4.3bsd:1.*:*) - echo m68k-hp-bsd - exit ;; - hp300:4.4BSD:*:* | 9000/[34]??:4.3bsd:2.*:*) - echo m68k-hp-bsd4.4 - exit ;; - 9000/[34678]??:HP-UX:*:*) - HPUX_REV=`echo "$UNAME_RELEASE"|sed -e 's/[^.]*.[0B]*//'` - case "$UNAME_MACHINE" in - 9000/31?) HP_ARCH=m68000 ;; - 9000/[34]??) HP_ARCH=m68k ;; - 9000/[678][0-9][0-9]) - if [ -x /usr/bin/getconf ]; then - sc_cpu_version=`/usr/bin/getconf SC_CPU_VERSION 2>/dev/null` - sc_kernel_bits=`/usr/bin/getconf SC_KERNEL_BITS 2>/dev/null` - case "$sc_cpu_version" in - 523) HP_ARCH=hppa1.0 ;; # CPU_PA_RISC1_0 - 528) HP_ARCH=hppa1.1 ;; # CPU_PA_RISC1_1 - 532) # CPU_PA_RISC2_0 - case "$sc_kernel_bits" in - 32) HP_ARCH=hppa2.0n ;; - 64) HP_ARCH=hppa2.0w ;; - '') HP_ARCH=hppa2.0 ;; # HP-UX 10.20 - esac ;; - esac - fi - if [ "$HP_ARCH" = "" ]; then - eval "$set_cc_for_build" - sed 's/^ //' << EOF > "$dummy.c" - - #define _HPUX_SOURCE - #include - #include - - int main () - { - #if defined(_SC_KERNEL_BITS) - long bits = sysconf(_SC_KERNEL_BITS); - #endif - long cpu = sysconf (_SC_CPU_VERSION); - - switch (cpu) - { - case CPU_PA_RISC1_0: puts ("hppa1.0"); break; - case CPU_PA_RISC1_1: puts ("hppa1.1"); break; - case CPU_PA_RISC2_0: - #if defined(_SC_KERNEL_BITS) - switch (bits) - { - case 64: puts ("hppa2.0w"); break; - case 32: puts ("hppa2.0n"); break; - default: puts ("hppa2.0"); break; - } break; - #else /* !defined(_SC_KERNEL_BITS) */ - puts ("hppa2.0"); break; - #endif - default: puts ("hppa1.0"); break; - } - exit (0); - } -EOF - (CCOPTS="" $CC_FOR_BUILD -o "$dummy" "$dummy.c" 2>/dev/null) && HP_ARCH=`"$dummy"` - test -z "$HP_ARCH" && HP_ARCH=hppa - fi ;; - esac - if [ "$HP_ARCH" = hppa2.0w ] - then - eval "$set_cc_for_build" - - # hppa2.0w-hp-hpux* has a 64-bit kernel and a compiler generating - # 32-bit code. hppa64-hp-hpux* has the same kernel and a compiler - # generating 64-bit code. GNU and HP use different nomenclature: - # - # $ CC_FOR_BUILD=cc ./config.guess - # => hppa2.0w-hp-hpux11.23 - # $ CC_FOR_BUILD="cc +DA2.0w" ./config.guess - # => hppa64-hp-hpux11.23 - - if echo __LP64__ | (CCOPTS="" $CC_FOR_BUILD -E - 2>/dev/null) | - grep -q __LP64__ - then - HP_ARCH=hppa2.0w - else - HP_ARCH=hppa64 - fi - fi - echo "$HP_ARCH"-hp-hpux"$HPUX_REV" - exit ;; - ia64:HP-UX:*:*) - HPUX_REV=`echo "$UNAME_RELEASE"|sed -e 's/[^.]*.[0B]*//'` - echo ia64-hp-hpux"$HPUX_REV" - exit ;; - 3050*:HI-UX:*:*) - eval "$set_cc_for_build" - sed 's/^ //' << EOF > "$dummy.c" - #include - int - main () - { - long cpu = sysconf (_SC_CPU_VERSION); - /* The order matters, because CPU_IS_HP_MC68K erroneously returns - true for CPU_PA_RISC1_0. CPU_IS_PA_RISC returns correct - results, however. */ - if (CPU_IS_PA_RISC (cpu)) - { - switch (cpu) - { - case CPU_PA_RISC1_0: puts ("hppa1.0-hitachi-hiuxwe2"); break; - case CPU_PA_RISC1_1: puts ("hppa1.1-hitachi-hiuxwe2"); break; - case CPU_PA_RISC2_0: puts ("hppa2.0-hitachi-hiuxwe2"); break; - default: puts ("hppa-hitachi-hiuxwe2"); break; - } - } - else if (CPU_IS_HP_MC68K (cpu)) - puts ("m68k-hitachi-hiuxwe2"); - else puts ("unknown-hitachi-hiuxwe2"); - exit (0); - } -EOF - $CC_FOR_BUILD -o "$dummy" "$dummy.c" && SYSTEM_NAME=`"$dummy"` && - { echo "$SYSTEM_NAME"; exit; } - echo unknown-hitachi-hiuxwe2 - exit ;; - 9000/7??:4.3bsd:*:* | 9000/8?[79]:4.3bsd:*:*) - echo hppa1.1-hp-bsd - exit ;; - 9000/8??:4.3bsd:*:*) - echo hppa1.0-hp-bsd - exit ;; - *9??*:MPE/iX:*:* | *3000*:MPE/iX:*:*) - echo hppa1.0-hp-mpeix - exit ;; - hp7??:OSF1:*:* | hp8?[79]:OSF1:*:*) - echo hppa1.1-hp-osf - exit ;; - hp8??:OSF1:*:*) - echo hppa1.0-hp-osf - exit ;; - i*86:OSF1:*:*) - if [ -x /usr/sbin/sysversion ] ; then - echo "$UNAME_MACHINE"-unknown-osf1mk - else - echo "$UNAME_MACHINE"-unknown-osf1 - fi - exit ;; - parisc*:Lites*:*:*) - echo hppa1.1-hp-lites - exit ;; - C1*:ConvexOS:*:* | convex:ConvexOS:C1*:*) - echo c1-convex-bsd - exit ;; - C2*:ConvexOS:*:* | convex:ConvexOS:C2*:*) - if getsysinfo -f scalar_acc - then echo c32-convex-bsd - else echo c2-convex-bsd - fi - exit ;; - C34*:ConvexOS:*:* | convex:ConvexOS:C34*:*) - echo c34-convex-bsd - exit ;; - C38*:ConvexOS:*:* | convex:ConvexOS:C38*:*) - echo c38-convex-bsd - exit ;; - C4*:ConvexOS:*:* | convex:ConvexOS:C4*:*) - echo c4-convex-bsd - exit ;; - CRAY*Y-MP:*:*:*) - echo ymp-cray-unicos"$UNAME_RELEASE" | sed -e 's/\.[^.]*$/.X/' - exit ;; - CRAY*[A-Z]90:*:*:*) - echo "$UNAME_MACHINE"-cray-unicos"$UNAME_RELEASE" \ - | sed -e 's/CRAY.*\([A-Z]90\)/\1/' \ - -e y/ABCDEFGHIJKLMNOPQRSTUVWXYZ/abcdefghijklmnopqrstuvwxyz/ \ - -e 's/\.[^.]*$/.X/' - exit ;; - CRAY*TS:*:*:*) - echo t90-cray-unicos"$UNAME_RELEASE" | sed -e 's/\.[^.]*$/.X/' - exit ;; - CRAY*T3E:*:*:*) - echo alphaev5-cray-unicosmk"$UNAME_RELEASE" | sed -e 's/\.[^.]*$/.X/' - exit ;; - CRAY*SV1:*:*:*) - echo sv1-cray-unicos"$UNAME_RELEASE" | sed -e 's/\.[^.]*$/.X/' - exit ;; - *:UNICOS/mp:*:*) - echo craynv-cray-unicosmp"$UNAME_RELEASE" | sed -e 's/\.[^.]*$/.X/' - exit ;; - F30[01]:UNIX_System_V:*:* | F700:UNIX_System_V:*:*) - FUJITSU_PROC=`uname -m | tr ABCDEFGHIJKLMNOPQRSTUVWXYZ abcdefghijklmnopqrstuvwxyz` - FUJITSU_SYS=`uname -p | tr ABCDEFGHIJKLMNOPQRSTUVWXYZ abcdefghijklmnopqrstuvwxyz | sed -e 's/\///'` - FUJITSU_REL=`echo "$UNAME_RELEASE" | sed -e 's/ /_/'` - echo "${FUJITSU_PROC}-fujitsu-${FUJITSU_SYS}${FUJITSU_REL}" - exit ;; - 5000:UNIX_System_V:4.*:*) - FUJITSU_SYS=`uname -p | tr ABCDEFGHIJKLMNOPQRSTUVWXYZ abcdefghijklmnopqrstuvwxyz | sed -e 's/\///'` - FUJITSU_REL=`echo "$UNAME_RELEASE" | tr ABCDEFGHIJKLMNOPQRSTUVWXYZ abcdefghijklmnopqrstuvwxyz | sed -e 's/ /_/'` - echo "sparc-fujitsu-${FUJITSU_SYS}${FUJITSU_REL}" - exit ;; - i*86:BSD/386:*:* | i*86:BSD/OS:*:* | *:Ascend\ Embedded/OS:*:*) - echo "$UNAME_MACHINE"-pc-bsdi"$UNAME_RELEASE" - exit ;; - sparc*:BSD/OS:*:*) - echo sparc-unknown-bsdi"$UNAME_RELEASE" - exit ;; - *:BSD/OS:*:*) - echo "$UNAME_MACHINE"-unknown-bsdi"$UNAME_RELEASE" - exit ;; - *:FreeBSD:*:*) - UNAME_PROCESSOR=`/usr/bin/uname -p` - case "$UNAME_PROCESSOR" in - amd64) - UNAME_PROCESSOR=x86_64 ;; - i386) - UNAME_PROCESSOR=i586 ;; - esac - echo "$UNAME_PROCESSOR"-unknown-freebsd"`echo "$UNAME_RELEASE"|sed -e 's/[-(].*//'`" - exit ;; - i*:CYGWIN*:*) - echo "$UNAME_MACHINE"-pc-cygwin - exit ;; - *:MINGW64*:*) - echo "$UNAME_MACHINE"-pc-mingw64 - exit ;; - *:MINGW*:*) - echo "$UNAME_MACHINE"-pc-mingw32 - exit ;; - *:MSYS*:*) - echo "$UNAME_MACHINE"-pc-msys - exit ;; - i*:PW*:*) - echo "$UNAME_MACHINE"-pc-pw32 - exit ;; - *:Interix*:*) - case "$UNAME_MACHINE" in - x86) - echo i586-pc-interix"$UNAME_RELEASE" - exit ;; - authenticamd | genuineintel | EM64T) - echo x86_64-unknown-interix"$UNAME_RELEASE" - exit ;; - IA64) - echo ia64-unknown-interix"$UNAME_RELEASE" - exit ;; - esac ;; - i*:UWIN*:*) - echo "$UNAME_MACHINE"-pc-uwin - exit ;; - amd64:CYGWIN*:*:* | x86_64:CYGWIN*:*:*) - echo x86_64-unknown-cygwin - exit ;; - prep*:SunOS:5.*:*) - echo powerpcle-unknown-solaris2"`echo "$UNAME_RELEASE"|sed -e 's/[^.]*//'`" - exit ;; - *:GNU:*:*) - # the GNU system - echo "`echo "$UNAME_MACHINE"|sed -e 's,[-/].*$,,'`-unknown-$LIBC`echo "$UNAME_RELEASE"|sed -e 's,/.*$,,'`" - exit ;; - *:GNU/*:*:*) - # other systems with GNU libc and userland - echo "$UNAME_MACHINE-unknown-`echo "$UNAME_SYSTEM" | sed 's,^[^/]*/,,' | tr "[:upper:]" "[:lower:]"``echo "$UNAME_RELEASE"|sed -e 's/[-(].*//'`-$LIBC" - exit ;; - i*86:Minix:*:*) - echo "$UNAME_MACHINE"-pc-minix - exit ;; - aarch64:Linux:*:*) - echo "$UNAME_MACHINE"-unknown-linux-"$LIBC" - exit ;; - aarch64_be:Linux:*:*) - UNAME_MACHINE=aarch64_be - echo "$UNAME_MACHINE"-unknown-linux-"$LIBC" - exit ;; - alpha:Linux:*:*) - case `sed -n '/^cpu model/s/^.*: \(.*\)/\1/p' < /proc/cpuinfo` in - EV5) UNAME_MACHINE=alphaev5 ;; - EV56) UNAME_MACHINE=alphaev56 ;; - PCA56) UNAME_MACHINE=alphapca56 ;; - PCA57) UNAME_MACHINE=alphapca56 ;; - EV6) UNAME_MACHINE=alphaev6 ;; - EV67) UNAME_MACHINE=alphaev67 ;; - EV68*) UNAME_MACHINE=alphaev68 ;; - esac - objdump --private-headers /bin/sh | grep -q ld.so.1 - if test "$?" = 0 ; then LIBC=gnulibc1 ; fi - echo "$UNAME_MACHINE"-unknown-linux-"$LIBC" - exit ;; - arc:Linux:*:* | arceb:Linux:*:*) - echo "$UNAME_MACHINE"-unknown-linux-"$LIBC" - exit ;; - arm*:Linux:*:*) - eval "$set_cc_for_build" - if echo __ARM_EABI__ | $CC_FOR_BUILD -E - 2>/dev/null \ - | grep -q __ARM_EABI__ - then - echo "$UNAME_MACHINE"-unknown-linux-"$LIBC" - else - if echo __ARM_PCS_VFP | $CC_FOR_BUILD -E - 2>/dev/null \ - | grep -q __ARM_PCS_VFP - then - echo "$UNAME_MACHINE"-unknown-linux-"$LIBC"eabi - else - echo "$UNAME_MACHINE"-unknown-linux-"$LIBC"eabihf - fi - fi - exit ;; - avr32*:Linux:*:*) - echo "$UNAME_MACHINE"-unknown-linux-"$LIBC" - exit ;; - cris:Linux:*:*) - echo "$UNAME_MACHINE"-axis-linux-"$LIBC" - exit ;; - crisv32:Linux:*:*) - echo "$UNAME_MACHINE"-axis-linux-"$LIBC" - exit ;; - e2k:Linux:*:*) - echo "$UNAME_MACHINE"-unknown-linux-"$LIBC" - exit ;; - frv:Linux:*:*) - echo "$UNAME_MACHINE"-unknown-linux-"$LIBC" - exit ;; - hexagon:Linux:*:*) - echo "$UNAME_MACHINE"-unknown-linux-"$LIBC" - exit ;; - i*86:Linux:*:*) - echo "$UNAME_MACHINE"-pc-linux-"$LIBC" - exit ;; - ia64:Linux:*:*) - echo "$UNAME_MACHINE"-unknown-linux-"$LIBC" - exit ;; - k1om:Linux:*:*) - echo "$UNAME_MACHINE"-unknown-linux-"$LIBC" - exit ;; - m32r*:Linux:*:*) - echo "$UNAME_MACHINE"-unknown-linux-"$LIBC" - exit ;; - m68*:Linux:*:*) - echo "$UNAME_MACHINE"-unknown-linux-"$LIBC" - exit ;; - mips:Linux:*:* | mips64:Linux:*:*) - eval "$set_cc_for_build" - sed 's/^ //' << EOF > "$dummy.c" - #undef CPU - #undef ${UNAME_MACHINE} - #undef ${UNAME_MACHINE}el - #if defined(__MIPSEL__) || defined(__MIPSEL) || defined(_MIPSEL) || defined(MIPSEL) - CPU=${UNAME_MACHINE}el - #else - #if defined(__MIPSEB__) || defined(__MIPSEB) || defined(_MIPSEB) || defined(MIPSEB) - CPU=${UNAME_MACHINE} - #else - CPU= - #endif - #endif -EOF - eval "`$CC_FOR_BUILD -E "$dummy.c" 2>/dev/null | grep '^CPU'`" - test "x$CPU" != x && { echo "$CPU-unknown-linux-$LIBC"; exit; } - ;; - mips64el:Linux:*:*) - echo "$UNAME_MACHINE"-unknown-linux-"$LIBC" - exit ;; - openrisc*:Linux:*:*) - echo or1k-unknown-linux-"$LIBC" - exit ;; - or32:Linux:*:* | or1k*:Linux:*:*) - echo "$UNAME_MACHINE"-unknown-linux-"$LIBC" - exit ;; - padre:Linux:*:*) - echo sparc-unknown-linux-"$LIBC" - exit ;; - parisc64:Linux:*:* | hppa64:Linux:*:*) - echo hppa64-unknown-linux-"$LIBC" - exit ;; - parisc:Linux:*:* | hppa:Linux:*:*) - # Look for CPU level - case `grep '^cpu[^a-z]*:' /proc/cpuinfo 2>/dev/null | cut -d' ' -f2` in - PA7*) echo hppa1.1-unknown-linux-"$LIBC" ;; - PA8*) echo hppa2.0-unknown-linux-"$LIBC" ;; - *) echo hppa-unknown-linux-"$LIBC" ;; - esac - exit ;; - ppc64:Linux:*:*) - echo powerpc64-unknown-linux-"$LIBC" - exit ;; - ppc:Linux:*:*) - echo powerpc-unknown-linux-"$LIBC" - exit ;; - ppc64le:Linux:*:*) - echo powerpc64le-unknown-linux-"$LIBC" - exit ;; - ppcle:Linux:*:*) - echo powerpcle-unknown-linux-"$LIBC" - exit ;; - riscv32:Linux:*:* | riscv64:Linux:*:*) - echo "$UNAME_MACHINE"-unknown-linux-"$LIBC" - exit ;; - s390:Linux:*:* | s390x:Linux:*:*) - echo "$UNAME_MACHINE"-ibm-linux-"$LIBC" - exit ;; - sh64*:Linux:*:*) - echo "$UNAME_MACHINE"-unknown-linux-"$LIBC" - exit ;; - sh*:Linux:*:*) - echo "$UNAME_MACHINE"-unknown-linux-"$LIBC" - exit ;; - sparc:Linux:*:* | sparc64:Linux:*:*) - echo "$UNAME_MACHINE"-unknown-linux-"$LIBC" - exit ;; - tile*:Linux:*:*) - echo "$UNAME_MACHINE"-unknown-linux-"$LIBC" - exit ;; - vax:Linux:*:*) - echo "$UNAME_MACHINE"-dec-linux-"$LIBC" - exit ;; - x86_64:Linux:*:*) - echo "$UNAME_MACHINE"-pc-linux-"$LIBC" - exit ;; - xtensa*:Linux:*:*) - echo "$UNAME_MACHINE"-unknown-linux-"$LIBC" - exit ;; - i*86:DYNIX/ptx:4*:*) - # ptx 4.0 does uname -s correctly, with DYNIX/ptx in there. - # earlier versions are messed up and put the nodename in both - # sysname and nodename. - echo i386-sequent-sysv4 - exit ;; - i*86:UNIX_SV:4.2MP:2.*) - # Unixware is an offshoot of SVR4, but it has its own version - # number series starting with 2... - # I am not positive that other SVR4 systems won't match this, - # I just have to hope. -- rms. - # Use sysv4.2uw... so that sysv4* matches it. - echo "$UNAME_MACHINE"-pc-sysv4.2uw"$UNAME_VERSION" - exit ;; 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echo IS_PPC; echo '#endif') | \ - (CCOPTS="" $CC_FOR_BUILD -E - 2>/dev/null) | \ - grep IS_PPC >/dev/null - then - UNAME_PROCESSOR=powerpc - fi - fi - elif test "$UNAME_PROCESSOR" = i386 ; then - # Avoid executing cc on OS X 10.9, as it ships with a stub - # that puts up a graphical alert prompting to install - # developer tools. Any system running Mac OS X 10.7 or - # later (Darwin 11 and later) is required to have a 64-bit - # processor. 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Generated from configure.ac by autoheader. */ - -/* Define to 1 if you have the header file. */ -#undef HAVE_DLFCN_H - -/* Define to 1 if you have the `feenableexcept' function. */ -#undef HAVE_FEENABLEEXCEPT - -/* Define to 1 if you have the header file. */ -#undef HAVE_INTTYPES_H - -/* Define to 1 if you have the `m' library (-lm). */ -#undef HAVE_LIBM - -/* Define to 1 if you have the `z' library (-lz). */ -#undef HAVE_LIBZ - -/* Define to 1 if you have the header file. */ -#undef HAVE_MEMORY_H - -/* Define to 1 if you have the `pow' function. */ -#undef HAVE_POW - -/* Define to 1 if you have the header file. */ -#undef HAVE_STDINT_H - -/* Define to 1 if you have the header file. */ -#undef HAVE_STDLIB_H - -/* Define to 1 if you have the header file. */ -#undef HAVE_STRINGS_H - -/* Define to 1 if you have the header file. */ -#undef HAVE_STRING_H - -/* Define to 1 if you have the header file. */ -#undef HAVE_SYS_STAT_H - -/* Define to 1 if you have the header file. */ -#undef HAVE_SYS_TYPES_H - -/* Define to 1 if you have the header file. */ -#undef HAVE_UNISTD_H - -/* Define to the sub-directory where libtool stores uninstalled libraries. */ -#undef LT_OBJDIR - -/* Name of package */ -#undef PACKAGE - -/* Define to the address where bug reports for this package should be sent. */ -#undef PACKAGE_BUGREPORT - -/* Define to the full name of this package. */ -#undef PACKAGE_NAME - -/* Define to the full name and version of this package. */ -#undef PACKAGE_STRING - -/* Define to the one symbol short name of this package. */ -#undef PACKAGE_TARNAME - -/* Define to the home page for this package. */ -#undef PACKAGE_URL - -/* Define to the version of this package. */ -#undef PACKAGE_VERSION - -/* Turn on ARM Neon optimizations at run-time */ -#undef PNG_ARM_NEON_API_SUPPORTED - -/* Check for ARM Neon support at run-time */ -#undef PNG_ARM_NEON_CHECK_SUPPORTED - -/* Enable ARM Neon optimizations */ -#undef PNG_ARM_NEON_OPT - -/* Enable Intel SSE optimizations */ -#undef PNG_INTEL_SSE_OPT - -/* Turn on MIPS MSA optimizations at run-time */ -#undef PNG_MIPS_MSA_API_SUPPORTED - -/* Check for MIPS MSA support at run-time */ -#undef PNG_MIPS_MSA_CHECK_SUPPORTED - -/* Enable MIPS MSA optimizations */ -#undef PNG_MIPS_MSA_OPT - -/* Turn on POWERPC VSX optimizations at run-time */ -#undef PNG_POWERPC_VSX_API_SUPPORTED - -/* Check for POWERPC VSX support at run-time */ -#undef PNG_POWERPC_VSX_CHECK_SUPPORTED - -/* Enable POWERPC VSX optimizations */ -#undef PNG_POWERPC_VSX_OPT - -/* Define to 1 if you have the ANSI C header files. */ -#undef STDC_HEADERS - -/* Define to 1 if your declares `struct tm'. */ -#undef TM_IN_SYS_TIME - -/* Version number of package */ -#undef VERSION - -/* Define to empty if `const' does not conform to ANSI C. */ -#undef const - -/* Define to the equivalent of the C99 'restrict' keyword, or to - nothing if this is not supported. Do not define if restrict is - supported directly. */ -#undef restrict -/* Work around a bug in Sun C++: it does not support _Restrict or - __restrict__, even though the corresponding Sun C compiler ends up with - "#define restrict _Restrict" or "#define restrict __restrict__" in the - previous line. Perhaps some future version of Sun C++ will work with - restrict; if so, hopefully it defines __RESTRICT like Sun C does. */ -#if defined __SUNPRO_CC && !defined __RESTRICT -# define _Restrict -# define __restrict__ -#endif - -/* Define to `unsigned int' if does not define. */ -#undef size_t diff --git a/lib/libpng-1.6.37/config.sub b/lib/libpng-1.6.37/config.sub deleted file mode 100755 index 9ccf09a..0000000 --- a/lib/libpng-1.6.37/config.sub +++ /dev/null @@ -1,1801 +0,0 @@ -#! /bin/sh -# Configuration validation subroutine script. -# Copyright 1992-2018 Free Software Foundation, Inc. - -timestamp='2018-03-08' - -# This file is free software; you can redistribute it and/or modify it -# under the terms of the GNU General Public License as published by -# the Free Software Foundation; either version 3 of the License, or -# (at your option) any later version. -# -# This program is distributed in the hope that it will be useful, but -# WITHOUT ANY WARRANTY; without even the implied warranty of -# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU -# General Public License for more details. -# -# You should have received a copy of the GNU General Public License -# along with this program; if not, see . -# -# As a special exception to the GNU General Public License, if you -# distribute this file as part of a program that contains a -# configuration script generated by Autoconf, you may include it under -# the same distribution terms that you use for the rest of that -# program. This Exception is an additional permission under section 7 -# of the GNU General Public License, version 3 ("GPLv3"). - - -# Please send patches to . -# -# Configuration subroutine to validate and canonicalize a configuration type. -# Supply the specified configuration type as an argument. -# If it is invalid, we print an error message on stderr and exit with code 1. -# Otherwise, we print the canonical config type on stdout and succeed. - -# You can get the latest version of this script from: -# https://git.savannah.gnu.org/gitweb/?p=config.git;a=blob_plain;f=config.sub - -# This file is supposed to be the same for all GNU packages -# and recognize all the CPU types, system types and aliases -# that are meaningful with *any* GNU software. -# Each package is responsible for reporting which valid configurations -# it does not support. The user should be able to distinguish -# a failure to support a valid configuration from a meaningless -# configuration. - -# The goal of this file is to map all the various variations of a given -# machine specification into a single specification in the form: -# CPU_TYPE-MANUFACTURER-OPERATING_SYSTEM -# or in some cases, the newer four-part form: -# CPU_TYPE-MANUFACTURER-KERNEL-OPERATING_SYSTEM -# It is wrong to echo any other type of specification. - -me=`echo "$0" | sed -e 's,.*/,,'` - -usage="\ -Usage: $0 [OPTION] CPU-MFR-OPSYS or ALIAS - -Canonicalize a configuration name. - -Options: - -h, --help print this help, then exit - -t, --time-stamp print date of last modification, then exit - -v, --version print version number, then exit - -Report bugs and patches to ." - -version="\ -GNU config.sub ($timestamp) - -Copyright 1992-2018 Free Software Foundation, Inc. - -This is free software; see the source for copying conditions. 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- mipsel*|mips64el*) - enable_mips_msa=yes - AC_DEFINE([PNG_MIPS_MSA_OPT], [0], - [Enable MIPS_MSA optimizations]) - ;; - i?86|x86_64) - enable_intel_sse=yes - AC_DEFINE([PNG_INTEL_SSE_OPT], [1], - [Enable Intel SSE optimizations]) - ;; - powerpc*|ppc64*) - enable_powerpc_vsx=yes - AC_DEFINE([PNG_POWERPC_VSX_OPT], [2], - [Enable POWERPC VSX optimizations]) - ;; - esac - ;; - esac]) - -# ARM -# === -# -# ARM NEON (SIMD) support. - -AC_ARG_ENABLE([arm-neon], - AS_HELP_STRING([[[--enable-arm-neon]]], - [Enable ARM NEON optimizations: =no/off, check, api, yes/on:] - [no/off: disable the optimizations; check: use internal checking code] - [(deprecated and poorly supported); api: disable by default, enable by] - [a call to png_set_option; yes/on: turn on unconditionally.] - [If not specified: determined by the compiler.]), - [case "$enableval" in - no|off) - # disable the default enabling on __ARM_NEON__ systems: - AC_DEFINE([PNG_ARM_NEON_OPT], [0], - [Disable ARM Neon optimizations]) - # Prevent inclusion of the assembler files below: - enable_arm_neon=no;; - check) - AC_DEFINE([PNG_ARM_NEON_CHECK_SUPPORTED], [], - [Check for ARM Neon support at run-time]);; - api) - AC_DEFINE([PNG_ARM_NEON_API_SUPPORTED], [], - [Turn on ARM Neon optimizations at run-time]);; - yes|on) - AC_DEFINE([PNG_ARM_NEON_OPT], [2], - [Enable ARM Neon optimizations]) - AC_MSG_WARN([--enable-arm-neon: please specify 'check' or 'api', if] - [you want the optimizations unconditionally pass -mfpu=neon] - [to the compiler.]);; - *) - AC_MSG_ERROR([--enable-arm-neon=${enable_arm_neon}: invalid value]) - esac]) - -# Add ARM specific files to all builds where the host_cpu is arm ('arm*') or -# where ARM optimizations were explicitly requested (this allows a fallback if a -# future host CPU does not match 'arm*') - -AM_CONDITIONAL([PNG_ARM_NEON], - [test "$enable_arm_neon" != 'no' && - case "$host_cpu" in - arm*|aarch64*) :;; - *) test "$enable_arm_neon" != '';; - esac]) - -# MIPS -# === -# -# MIPS MSA (SIMD) support. - -AC_ARG_ENABLE([mips-msa], - AS_HELP_STRING([[[--enable-mips-msa]]], - [Enable MIPS MSA optimizations: =no/off, check, api, yes/on:] - [no/off: disable the optimizations; check: use internal checking code] - [(deprecated and poorly supported); api: disable by default, enable by] - [a call to png_set_option; yes/on: turn on unconditionally.] - [If not specified: determined by the compiler.]), - [case "$enableval" in - no|off) - # disable the default enabling on __mips_msa systems: - AC_DEFINE([PNG_MIPS_MSA_OPT], [0], - [Disable MIPS MSA optimizations]) - # Prevent inclusion of the assembler files below: - enable_mips_msa=no;; - check) - AC_DEFINE([PNG_MIPS_MSA_CHECK_SUPPORTED], [], - [Check for MIPS MSA support at run-time]);; - api) - AC_DEFINE([PNG_MIPS_MSA_API_SUPPORTED], [], - [Turn on MIPS MSA optimizations at run-time]);; - yes|on) - AC_DEFINE([PNG_MIPS_MSA_OPT], [2], - [Enable MIPS MSA optimizations]) - AC_MSG_WARN([--enable-mips-msa: please specify 'check' or 'api', if] - [you want the optimizations unconditionally pass '-mmsa -mfp64'] - [to the compiler.]);; - *) - AC_MSG_ERROR([--enable-mips-msa=${enable_mips_msa}: invalid value]) - esac]) - -# Add MIPS specific files to all builds where the host_cpu is mips ('mips*') or -# where MIPS optimizations were explicitly requested (this allows a fallback if a -# future host CPU does not match 'mips*') - -AM_CONDITIONAL([PNG_MIPS_MSA], - [test "$enable_mips_msa" != 'no' && - case "$host_cpu" in - mipsel*|mips64el*) :;; - esac]) - -# INTEL -# ===== -# -# INTEL SSE (SIMD) support. - -AC_ARG_ENABLE([intel-sse], - AS_HELP_STRING([[[--enable-intel-sse]]], - [Enable Intel SSE optimizations: =no/off, yes/on:] - [no/off: disable the optimizations;] - [yes/on: enable the optimizations.] - [If not specified: determined by the compiler.]), - [case "$enableval" in - no|off) - # disable the default enabling: - AC_DEFINE([PNG_INTEL_SSE_OPT], [0], - [Disable Intel SSE optimizations]) - # Prevent inclusion of the assembler files below: - enable_intel_sse=no;; - yes|on) - AC_DEFINE([PNG_INTEL_SSE_OPT], [1], - [Enable Intel SSE optimizations]);; - *) - AC_MSG_ERROR([--enable-intel-sse=${enable_intel_sse}: invalid value]) - esac]) - -# Add Intel specific files to all builds where the host_cpu is Intel ('x86*') -# or where Intel optimizations were explicitly requested (this allows a -# fallback if a future host CPU does not match 'x86*') -AM_CONDITIONAL([PNG_INTEL_SSE], - [test "$enable_intel_sse" != 'no' && - case "$host_cpu" in - i?86|x86_64) :;; - *) test "$enable_intel_sse" != '';; - esac]) - -# PowerPC -# === -# -# PowerPC VSX (SIMD) support. - -AC_ARG_ENABLE([powerpc-vsx], -AS_HELP_STRING([[[--enable-powerpc-vsx]]], - [Enable POWERPC VSX optimizations: =no/off, check, api, yes/on:] - [no/off: disable the optimizations; check: use internal checking code] - [api: disable by default, enable by a call to png_set_option] - [yes/on: turn on unconditionally.] - [If not specified: determined by the compiler.]), - [case "$enableval" in - no|off) - # disable the default enabling on __ppc64__ systems: - AC_DEFINE([PNG_POWERPC_VSX_OPT], [0], - [Disable POWERPC VSX optimizations]) - # Prevent inclusion of the platform specific files below: - enable_powerpc_vsx=no;; - check) - AC_DEFINE([PNG_POWERPC_VSX_CHECK_SUPPORTED], [], - [Check for POWERPC VSX support at run-time]) - AC_MSG_WARN([--enable-powerpc-vsx Please check contrib/powerpc/README file] - [for the list of supported OSes.]);; - api) - AC_DEFINE([PNG_POWERPC_VSX_API_SUPPORTED], [], - [Turn on POWERPC VSX optimizations at run-time]);; - yes|on) - AC_DEFINE([PNG_POWERPC_VSX_OPT], [2], - [Enable POWERPC VSX optimizations]) - AC_MSG_WARN([--enable-powerpc-vsx: please specify 'check' or 'api', if] - [you want the optimizations unconditionally pass '-maltivec -mvsx'] - [or '-mcpu=power8'to the compiler.]);; - *) - AC_MSG_ERROR([--enable-powerpc-vsx=${enable_powerpc_vsx}: invalid value]) - esac]) - -# Add PowerPC specific files to all builds where the host_cpu is powerpc('powerpc*') or -# where POWERPC optimizations were explicitly requested (this allows a fallback if a -# future host CPU does not match 'powerpc*') - -AM_CONDITIONAL([PNG_POWERPC_VSX], - [test "$enable_powerpc_vsx" != 'no' && - case "$host_cpu" in - powerpc*|ppc64*) :;; - esac]) - - -AC_MSG_NOTICE([[Extra options for compiler: $PNG_COPTS]]) - -# Config files, substituting as above -AC_CONFIG_FILES([Makefile libpng.pc:libpng.pc.in]) -AC_CONFIG_FILES([libpng-config:libpng-config.in], - [chmod +x libpng-config]) - -AC_OUTPUT diff --git a/lib/libpng-1.6.37/contrib/README.txt b/lib/libpng-1.6.37/contrib/README.txt deleted file mode 100644 index 97963c6..0000000 --- a/lib/libpng-1.6.37/contrib/README.txt +++ /dev/null @@ -1,5 +0,0 @@ - -This "contrib" directory contains contributions which are not necessarily under -the libpng license, although all are open source. They are not part of -libpng proper and are not used for building the library, although some are used -for testing the library via "make check". diff --git a/lib/libpng-1.6.37/contrib/arm-neon/README b/lib/libpng-1.6.37/contrib/arm-neon/README deleted file mode 100644 index b4248cf..0000000 --- a/lib/libpng-1.6.37/contrib/arm-neon/README +++ /dev/null @@ -1,83 +0,0 @@ -OPERATING SYSTEM SPECIFIC ARM NEON DETECTION --------------------------------------------- - -Detection of the ability to execute ARM NEON on an ARM processor requires -operating system support. (The information is not available in user mode.) - -HOW TO USE THIS ---------------- - -This directory contains C code fragments that can be included in arm/arm_init.c -by setting the macro PNG_ARM_NEON_FILE to the file name in "" or <> at build -time. This setting is not recorded in pnglibconf.h and can be changed simply by -rebuilding arm/arm_init.o with the required macro definition. - -For any of this code to be used the ARM NEON code must be enabled and run time -checks must be supported. I.e.: - -#if PNG_ARM_NEON_OPT > 0 -#ifdef PNG_ARM_NEON_CHECK_SUPPORTED - -This is done in a 'configure' build by passing configure the argument: - - --enable-arm-neon=check - -Apart from the basic Linux implementation in contrib/arm-neon/linux.c this code -is unsupported. That means that it is not even compiled on a regular basis and -may be broken in any given minor release. - -FILE FORMAT ------------ - -Each file documents its testing status as of the last time it was tested (which -may have been a long time ago): - -STATUS: one of: - SUPPORTED: This indicates that the file is included in the regularly - performed test builds and bugs are fixed when discovered. - COMPILED: This indicates that the code did compile at least once. See the - more detailed description for the extent to which the result was - successful. - TESTED: This means the code was fully compiled into the libpng test programs - and these were run at least once. - -BUG REPORTS: an email address to which to send reports of problems - -The file is a fragment of C code. It should not define any 'extern' symbols; -everything should be static. It must define the function: - -static int png_have_neon(png_structp png_ptr); - -That function must return 1 if ARM NEON instructions are supported, 0 if not. -It must not execute png_error unless it detects a bug. A png_error will prevent -the reading of the PNG and in the future, writing too. - -BUG REPORTS ------------ - -If you mail a bug report for any file that is not SUPPORTED there may only be -limited response. Consider fixing it and sending a patch to fix the problem - -this is more likely to result in action. - -CONTRIBUTIONS -------------- - -You may send contributions of new implementations to -png-mng-implement@sourceforge.net. Please write code in strict C90 C where -possible. Obviously OS dependencies are to be expected. If you submit code you -must have the authors permission and it must have a license that is acceptable -to the current maintainer; in particular that license must permit modification -and redistribution. - -Please try to make the contribution a single file and give the file a clear and -unambiguous name that identifies the target OS. If multiple files really are -required put them all in a sub-directory. - -You must also be prepared to handle bug reports from users of the code, either -by joining the png-mng-implement mailing list or by providing an email for the -"BUG REPORTS" entry or both. Please make sure that the header of the file -contains the STATUS and BUG REPORTS fields as above. - -Please list the OS requirements as precisely as possible. Ideally you should -also list the environment in which the code has been tested and certainly list -any environments where you suspect it might not work. diff --git a/lib/libpng-1.6.37/contrib/arm-neon/android-ndk.c b/lib/libpng-1.6.37/contrib/arm-neon/android-ndk.c deleted file mode 100644 index fb3a489..0000000 --- a/lib/libpng-1.6.37/contrib/arm-neon/android-ndk.c +++ /dev/null @@ -1,39 +0,0 @@ -/* contrib/arm-neon/android-ndk.c - * - * Copyright (c) 2014 Glenn Randers-Pehrson - * Written by John Bowler, 2014. - * Last changed in libpng 1.6.10 [March 6, 2014] - * - * This code is released under the libpng license. - * For conditions of distribution and use, see the disclaimer - * and license in png.h - * - * SEE contrib/arm-neon/README before reporting bugs - * - * STATUS: COMPILED, UNTESTED - * BUG REPORTS: png-mng-implement@sourceforge.net - * - * png_have_neon implemented for the Android NDK, see: - * - * Documentation: - * http://www.kandroid.org/ndk/docs/CPU-ARM-NEON.html - * https://code.google.com/p/android/issues/detail?id=49065 - * - * NOTE: this requires that libpng is built against the Android NDK and linked - * with an implementation of the Android ARM 'cpu-features' library. The code - * has been compiled only, not linked: no version of the library has been found, - * only the header files exist in the NDK. - */ -#include - -static int -png_have_neon(png_structp png_ptr) -{ - /* This is a whole lot easier than the linux code, however it is probably - * implemented as below, therefore it is better to cache the result (these - * function calls may be slow!) - */ - PNG_UNUSED(png_ptr) - return android_getCpuFamily() == ANDROID_CPU_FAMILY_ARM && - (android_getCpuFeatures() & ANDROID_CPU_ARM_FEATURE_NEON) != 0; -} diff --git a/lib/libpng-1.6.37/contrib/arm-neon/linux-auxv.c b/lib/libpng-1.6.37/contrib/arm-neon/linux-auxv.c deleted file mode 100644 index 4d26bd3..0000000 --- a/lib/libpng-1.6.37/contrib/arm-neon/linux-auxv.c +++ /dev/null @@ -1,120 +0,0 @@ -/* contrib/arm-neon/linux-auxv.c - * - * Copyright (c) 2014 Glenn Randers-Pehrson - * Written by Mans Rullgard, 2011. - * Last changed in libpng 1.6.10 [March 6, 2014] - * - * This code is released under the libpng license. - * For conditions of distribution and use, see the disclaimer - * and license in png.h - * - * SEE contrib/arm-neon/README before reporting bugs - * - * STATUS: COMPILED, TESTED - * BUG REPORTS: png-mng-implement@sourceforge.net - * - * png_have_neon implemented for Linux versions which allow access to - * /proc/self/auxv. This is probably faster, cleaner and safer than the code to - * read /proc/cpuinfo in contrib/arm-neon/linux, however it is yet another piece - * of potentially untested code and has more complex dependencies than the code - * to read cpuinfo. - * - * This generic __linux__ implementation requires reading /proc/self/auxv and - * looking at each element for one that records NEON capabilities. - */ -#include /* for POSIX 1003.1 */ -#include /* for EINTR */ - -#include -#include -#include -#include -#include - -/* A read call may be interrupted, in which case it returns -1 and sets errno to - * EINTR if nothing was done, otherwise (if something was done) a partial read - * may result. - */ -static size_t -safe_read(png_structp png_ptr, int fd, void *buffer_in, size_t nbytes) -{ - size_t ntotal = 0; - char *buffer = png_voidcast(char*, buffer_in); - - while (nbytes > 0) - { - unsigned int nread; - int iread; - - /* Passing nread > INT_MAX to read is implementation defined in POSIX - * 1003.1, therefore despite the unsigned argument portable code must - * limit the value to INT_MAX! - */ - if (nbytes > INT_MAX) - nread = INT_MAX; - - else - nread = (unsigned int)/*SAFE*/nbytes; - - iread = read(fd, buffer, nread); - - if (iread == -1) - { - /* This is the devil in the details, a read can terminate early with 0 - * bytes read because of EINTR, yet it still returns -1 otherwise end - * of file cannot be distinguished. - */ - if (errno != EINTR) - { - png_warning(png_ptr, "/proc read failed"); - return 0; /* I.e., a permanent failure */ - } - } - - else if (iread < 0) - { - /* Not a valid 'read' result: */ - png_warning(png_ptr, "OS /proc read bug"); - return 0; - } - - else if (iread > 0) - { - /* Continue reading until a permanent failure, or EOF */ - buffer += iread; - nbytes -= (unsigned int)/*SAFE*/iread; - ntotal += (unsigned int)/*SAFE*/iread; - } - - else - return ntotal; - } - - return ntotal; /* nbytes == 0 */ -} - -static int -png_have_neon(png_structp png_ptr) -{ - int fd = open("/proc/self/auxv", O_RDONLY); - Elf32_auxv_t aux; - - /* Failsafe: failure to open means no NEON */ - if (fd == -1) - { - png_warning(png_ptr, "/proc/self/auxv open failed"); - return 0; - } - - while (safe_read(png_ptr, fd, &aux, sizeof aux) == sizeof aux) - { - if (aux.a_type == AT_HWCAP && (aux.a_un.a_val & HWCAP_NEON) != 0) - { - close(fd); - return 1; - } - } - - close(fd); - return 0; -} diff --git a/lib/libpng-1.6.37/contrib/arm-neon/linux.c b/lib/libpng-1.6.37/contrib/arm-neon/linux.c deleted file mode 100644 index a9bc360..0000000 --- a/lib/libpng-1.6.37/contrib/arm-neon/linux.c +++ /dev/null @@ -1,161 +0,0 @@ -/* contrib/arm-neon/linux.c - * - * Last changed in libpng 1.6.31 [July 27, 2017] - * Copyright (c) 2014, 2017 Glenn Randers-Pehrson - * Written by John Bowler, 2014, 2017. - * - * This code is released under the libpng license. - * For conditions of distribution and use, see the disclaimer - * and license in png.h - * - * SEE contrib/arm-neon/README before reporting bugs - * - * STATUS: SUPPORTED - * BUG REPORTS: png-mng-implement@sourceforge.net - * - * png_have_neon implemented for Linux by reading the widely available - * pseudo-file /proc/cpuinfo. - * - * This code is strict ANSI-C and is probably moderately portable; it does - * however use and it assumes that /proc/cpuinfo is never localized. - */ -#include - -static int -png_have_neon(png_structp png_ptr) -{ - FILE *f = fopen("/proc/cpuinfo", "rb"); - - if (f != NULL) - { - /* This is a simple state machine which reads the input byte-by-byte until - * it gets a match on the 'neon' feature or reaches the end of the stream. - */ - static const char ch_feature[] = { 70, 69, 65, 84, 85, 82, 69, 83 }; - static const char ch_neon[] = { 78, 69, 79, 78 }; - - enum - { - StartLine, Feature, Colon, StartTag, Neon, HaveNeon, SkipTag, SkipLine - } state; - int counter; - - for (state=StartLine, counter=0;;) - { - int ch = fgetc(f); - - if (ch == EOF) - { - /* EOF means error or end-of-file, return false; neon at EOF is - * assumed to be a mistake. - */ - fclose(f); - return 0; - } - - switch (state) - { - case StartLine: - /* Match spaces at the start of line */ - if (ch <= 32) /* skip control characters and space */ - break; - - counter=0; - state = Feature; - /* FALLTHROUGH */ - - case Feature: - /* Match 'FEATURE', ASCII case insensitive. */ - if ((ch & ~0x20) == ch_feature[counter]) - { - if (++counter == (sizeof ch_feature)) - state = Colon; - break; - } - - /* did not match 'feature' */ - state = SkipLine; - /* FALLTHROUGH */ - - case SkipLine: - skipLine: - /* Skip everything until we see linefeed or carriage return */ - if (ch != 10 && ch != 13) - break; - - state = StartLine; - break; - - case Colon: - /* Match any number of space or tab followed by ':' */ - if (ch == 32 || ch == 9) - break; - - if (ch == 58) /* i.e. ':' */ - { - state = StartTag; - break; - } - - /* Either a bad line format or a 'feature' prefix followed by - * other characters. - */ - state = SkipLine; - goto skipLine; - - case StartTag: - /* Skip space characters before a tag */ - if (ch == 32 || ch == 9) - break; - - state = Neon; - counter = 0; - /* FALLTHROUGH */ - - case Neon: - /* Look for 'neon' tag */ - if ((ch & ~0x20) == ch_neon[counter]) - { - if (++counter == (sizeof ch_neon)) - state = HaveNeon; - break; - } - - state = SkipTag; - /* FALLTHROUGH */ - - case SkipTag: - /* Skip non-space characters */ - if (ch == 10 || ch == 13) - state = StartLine; - - else if (ch == 32 || ch == 9) - state = StartTag; - break; - - case HaveNeon: - /* Have seen a 'neon' prefix, but there must be a space or new - * line character to terminate it. - */ - if (ch == 10 || ch == 13 || ch == 32 || ch == 9) - { - fclose(f); - return 1; - } - - state = SkipTag; - break; - - default: - png_error(png_ptr, "png_have_neon: internal error (bug)"); - } - } - } - -#ifdef PNG_WARNINGS_SUPPORTED - else - png_warning(png_ptr, "/proc/cpuinfo open failed"); -#endif - - return 0; -} diff --git a/lib/libpng-1.6.37/contrib/conftest/README b/lib/libpng-1.6.37/contrib/conftest/README deleted file mode 100644 index 0f47279..0000000 --- a/lib/libpng-1.6.37/contrib/conftest/README +++ /dev/null @@ -1,49 +0,0 @@ -This directory contains test configuration files, currently always '.dfa' files -intended to be used in the build by setting the make macro DFA_XTRA to the name -of the file. - -These files are used in release validation of the 'configure' builds of libpng -by building 'make check', or 'make all-am' for cross-builds, with each .dfa -file. - -The files in this directory may change between minor releases, however -contributions describing specific builds of libpng are welcomed. There is no -guarantee that libpng will continue to build with such configurations; support -for given configurations can be, and has been, dropped between successive minor -releases. However if a .dfa file describing a configuration is not in this -directory it is very unlikely that it will be tested before a minor release! - -You can use these .dfa files as the basis of new configurations. Files in this -directory should not have any use restrictions or restrictive licenses. - -This directory is not included in the .zip and .7z distributions, which do -not contain 'configure' scripts. - -DOCUMENTATION -============= - -Examples: - ${srcdir}/pngusr.dfa - ${srcdir}/contrib/pngminim/*/pngusr.dfa - -Documentation of the options: - ${srcdir}/scripts/pnglibconf.dfa - -Documentation of the file format: - ${srcdir}/scripts/options.awk - -FILE NAMING -=========== - -File names in this directory may NOT contain any of the five characters: - - - , + * ? - -Neither may they contain any space character. - -While other characters may be used it is strongly suggested that file names be -limited to lower case Latiin alphabetic characters (a-z), digits (0-9) and, if -necessary the underscore (_) character. File names should be about 8 characters -long (excluding the .dfa extension). Submitted .dfa files should have names -between 7 and 16 characters long, shorter names (6 characters or less) are -reserved for standard tests. diff --git a/lib/libpng-1.6.37/contrib/conftest/pngcp.dfa b/lib/libpng-1.6.37/contrib/conftest/pngcp.dfa deleted file mode 100644 index 31c411d..0000000 --- a/lib/libpng-1.6.37/contrib/conftest/pngcp.dfa +++ /dev/null @@ -1,57 +0,0 @@ -# pngcp.dfa -# Build time configuration of libpng -# -# Author: John Bowler -# Copyright: (c) John Bowler, 2016 -# Usage rights: -# To the extent possible under law, the author has waived all copyright and -# related or neighboring rights to this work. This work is published from: -# United States. -# -# Build libpng with support for pngcp. This means just png_read_png, -# png_write_png and small number of configuration settings. -# -everything = off - -# This option is specific to this configuration; it adds a #define to the -# generated pnglibconf.h which turns on the (not portable) timing option for -# pngcp. Note that any option is automatically preceded by PNG_; there is no -# way round this and this is deliberate. -option PNGCP_TIMING - -# Because of the everything off above the option must also be turned on. This -# may not be done in one step because it is safer and avoids mis-spelled options -# in user .dfa files to error out if an unrecognized option is turned on. -option PNGCP_TIMING on - -# Options to turn on png_read_png and png_write_png: -option INFO_IMAGE on -option SEQUENTIAL_READ on -option EASY_ACCESS on -option WRITE on -option WRITE_16BIT on -option WRITE_FILTER on - -# pngcp needs this to preserve unknown chunks, switching all these on means that -# pngcp can work without explicit known chunk reading support -option UNKNOWN_CHUNKS on -option SET_UNKNOWN_CHUNKS on -option HANDLE_AS_UNKNOWN on -option SAVE_UNKNOWN_CHUNKS on -option WRITE_UNKNOWN_CHUNKS on - -# pngcp needs this to handle palette files with invalid indices: -option CHECK_FOR_INVALID_INDEX on -option GET_PALETTE_MAX on - -# Pre-libpng 1.7 pngcp has to stash text chunks manually, post 1.7 without this -# text chunks should be handled as unknown ok. -option TEXT on - -# this is used to turn off limits: -option USER_LIMITS on -option SET_USER_LIMITS on - -# these are just required for specific customizations -option WRITE_CUSTOMIZE_ZTXT_COMPRESSION on -option WRITE_CUSTOMIZE_COMPRESSION on diff --git a/lib/libpng-1.6.37/contrib/conftest/read.dfa b/lib/libpng-1.6.37/contrib/conftest/read.dfa deleted file mode 100644 index 21e88d0..0000000 --- a/lib/libpng-1.6.37/contrib/conftest/read.dfa +++ /dev/null @@ -1,58 +0,0 @@ -# read.dfa -# Build time configuration of libpng -# -# Author: John Bowler -# Copyright: (c) John Bowler, 2013 -# Usage rights: -# To the extent possible under law, the author has waived all copyright and -# related or neighboring rights to this work. This work is published from: -# United States. -# -# Build libpng with basic read support. This enables the lowest level libpng -# read API - the one where the calling code has to use a loop to read each row. -# At present this is the API used by most programs. -# -# Support is enabled only for those chunks and transformations that are -# typically required - others can be added easily. -# - -everything = off - -# The sequential read code is enabled here; the progressive code can be used -# instead but there is no point enabling both. - -option SEQUENTIAL_READ on - -# Likewise it is pointless enabling both fixed and floating point APIs. Choose -# one or the other for both the API and the internal math. - -#Fixed point: -#option FIXED_POINT on -#option FLOATING_ARITHMETIC off - -#Floating point: -option FLOATING_POINT on -option FLOATING_ARITHMETIC on - -# Basic error handling, IO and user memory support. The latter allows the -# application program to provide its own implementations of 'malloc' and 'free'. -option SETJMP on -option STDIO on -option USER_MEM on - -# To read the full set of PNG images correctly interlace, transparency and -# 16-bit support is required. The application can implement interlace itself, -# but very few do and it's no longer possible to disable it when READ is -# enabled. -option READ_tRNS on -option READ_16BIT on - -# Everything else is application dependent. This file assumes the app handles -# all the native PNG bit layouts, so it doesn't need any of layout change -# transforms, but needs libpng to perform gamma correction. It doesn't do any -# colorspace stuff and ignores the 'significant bit' information. -# -# If your app always expands the image to a limited set of bit layouts you -# probably want to consider using the simplified API instead of the low level -# one - see png.h and s_read.dfa. -option READ_GAMMA on diff --git a/lib/libpng-1.6.37/contrib/conftest/s_read.dfa b/lib/libpng-1.6.37/contrib/conftest/s_read.dfa deleted file mode 100644 index cb1ce0b..0000000 --- a/lib/libpng-1.6.37/contrib/conftest/s_read.dfa +++ /dev/null @@ -1,35 +0,0 @@ -# s_read.dfa -# Build time configuration of libpng -# -# Author: John Bowler -# Copyright: (c) John Bowler, 2013 -# Usage rights: -# To the extent possible under law, the author has waived all copyright and -# related or neighboring rights to this work. This work is published from: -# United States. -# -# Build libpng with simplified read support (only). This builds a minimal -# libpng able to read all PNG formats and convert them into a small number of -# well understood memory formats. -# - -everything = off - -option SIMPLIFIED_READ on - -# It isn't necessary to chose fixed or floating point for the APIs because the -# simplified API doesn't need fixed or floating point numbers. It is necessary -# to chose an internal math implementation. The default (because of 'everything -# = off') is fixed point - turn the floating point implementation on if you have -# hardware floating point or prefer your software floating point implementation. -option FLOATING_ARITHMETIC on - -# This is not strictly necessary, but without it the message strings in the API -# will not be filled in -option ERROR_TEXT on - -# Switching these options on enables the 'AFIRST' and 'BGR' formats - you don't -# need this if you don't use them, they just allow the in-memory layout to be -# changed to match common hardware formats. -option SIMPLIFIED_READ_AFIRST on -option SIMPLIFIED_READ_BGR on diff --git a/lib/libpng-1.6.37/contrib/conftest/s_write.dfa b/lib/libpng-1.6.37/contrib/conftest/s_write.dfa deleted file mode 100644 index e540a46..0000000 --- a/lib/libpng-1.6.37/contrib/conftest/s_write.dfa +++ /dev/null @@ -1,33 +0,0 @@ -# s_write.dfa -# Build time configuration of libpng -# -# Author: John Bowler -# Copyright: (c) John Bowler, 2013 -# Usage rights: -# To the extent possible under law, the author has waived all copyright and -# related or neighboring rights to this work. This work is published from: -# United States. -# -# Build libpng with (just) simplified write support -# - -everything = off - -option SIMPLIFIED_WRITE on - -# It isn't necessary to chose fixed or floating point for the APIs because the -# simplified API doesn't need fixed or floating point numbers. It is necessary -# to chose an internal math implementation. The default (because of 'everything -# = off') is fixed point - turn the floating point implementation on if you have -# hardware floating point or prefer your software floating point implementation. -option FLOATING_ARITHMETIC on - -# This is not strictly necessary, but without it the message strings in the API -# will not be filled in -option ERROR_TEXT on - -# Switching these options on enables the 'AFIRST' and 'BGR' formats - you don't -# need this if you don't use them, they just allow the in-memory layout to be -# changed to match common hardware formats. -option SIMPLIFIED_WRITE_AFIRST on -option SIMPLIFIED_WRITE_BGR on diff --git a/lib/libpng-1.6.37/contrib/conftest/simple.dfa b/lib/libpng-1.6.37/contrib/conftest/simple.dfa deleted file mode 100644 index 0419333..0000000 --- a/lib/libpng-1.6.37/contrib/conftest/simple.dfa +++ /dev/null @@ -1,36 +0,0 @@ -# simple.dfa -# Build time configuration of libpng -# -# Author: John Bowler -# Copyright: (c) John Bowler, 2013 -# Usage rights: -# To the extent possible under law, the author has waived all copyright and -# related or neighboring rights to this work. This work is published from: -# United States. -# -# Build libpng with just the simplified APIs (read and write). -# - -everything = off - -option SIMPLIFIED_WRITE on -option SIMPLIFIED_READ on - -# It isn't necessary to chose fixed or floating point for the APIs because the -# simplified API doesn't need fixed or floating point numbers. It is necessary -# to chose an internal math implementation. The default (because of 'everything -# = off') is fixed point - turn the floating point implementation on if you have -# hardware floating point or prefer your software floating point implementation. -option FLOATING_ARITHMETIC on - -# This is not strictly necessary, but without it the message strings in the API -# will not be filled in -option ERROR_TEXT on - -# Switching these options on enables the 'AFIRST' and 'BGR' formats - you don't -# need this if you don't use them, they just allow the in-memory layout to be -# changed to match common hardware formats. -option SIMPLIFIED_READ_AFIRST on -option SIMPLIFIED_READ_BGR on -option SIMPLIFIED_WRITE_AFIRST on -option SIMPLIFIED_WRITE_BGR on diff --git a/lib/libpng-1.6.37/contrib/conftest/write.dfa b/lib/libpng-1.6.37/contrib/conftest/write.dfa deleted file mode 100644 index 3319aab..0000000 --- a/lib/libpng-1.6.37/contrib/conftest/write.dfa +++ /dev/null @@ -1,45 +0,0 @@ -# write.dfa -# Build time configuration of libpng -# -# Author: John Bowler -# Copyright: (c) John Bowler, 2013 -# Usage rights: -# To the extent possible under law, the author has waived all copyright and -# related or neighboring rights to this work. This work is published from: -# United States. -# -# Build libpng with no read support and minimal write support. -# - -everything = off - -# Switch on the write code - this makes a minimalist encoder - -option WRITE on - -# Choose fixed or floating point APIs and arithmetic. The choices are -# independent but normally they will match. It is typically better to use the -# floating point if you have floating point hardware. If you don't know, or -# (perhaps) to make libpng smaller used fixed point throughout. - -#Fixed point: -#option FIXED_POINT on -#option FLOATING_ARITHMETIC off - -#Floating point: -option FLOATING_POINT on -option FLOATING_ARITHMETIC on - -# Basic error handling, IO and user memory support. The latter allows the -# application program to provide its own implementations of 'malloc' and 'free'. -option SETJMP on -option STDIO on -option USER_MEM on - -# Everything else is optional. Unlike the read code in libpng the write code -# does not need to deal with arbitrary formats, so only add support for things -# you really do write! For example you might only write sRGB images, sometimes -# with transparency and never write 16 bit images, so: -option WRITE_sRGB on -option WRITE_tRNS on -#option WRITE_16BIT off (this is the default with 'everything = off') diff --git a/lib/libpng-1.6.37/contrib/examples/README.txt b/lib/libpng-1.6.37/contrib/examples/README.txt deleted file mode 100644 index 48dab4f..0000000 --- a/lib/libpng-1.6.37/contrib/examples/README.txt +++ /dev/null @@ -1,24 +0,0 @@ - -This directory (contrib/examples) contains examples of libpng usage. - -NO COPYRIGHT RIGHTS ARE CLAIMED TO ANY OF THE FILES IN THIS DIRECTORY. - -To the extent possible under law, the authors have waived all copyright and -related or neighboring rights to this work. This work is published from: -United States. - -The files may be used freely in any way. The intention is that appropriate -parts of the files be used in other libpng-using programs without any need for -the authors of the using code to seek copyright or license from the original -authors. - -The source code and comments in this directory are the original work of the -people named below. No other person or organization has made contributions to -the work in this directory. - -ORIGINAL AUTHORS - The following people have contributed to the code in this directory. None - of the people below claim any rights with regard to the contents of this - directory. - - John Bowler diff --git a/lib/libpng-1.6.37/contrib/examples/iccfrompng.c b/lib/libpng-1.6.37/contrib/examples/iccfrompng.c deleted file mode 100644 index 00056ab..0000000 --- a/lib/libpng-1.6.37/contrib/examples/iccfrompng.c +++ /dev/null @@ -1,185 +0,0 @@ -/*- iccfrompng - * - * COPYRIGHT: Written by John Cunningham Bowler, 2011. - * To the extent possible under law, the author has waived all copyright and - * related or neighboring rights to this work. This work is published from: - * United States. - * - * Extract any icc profiles found in the given PNG files. This is a simple - * example of a program that extracts information from the header of a PNG file - * without processing the image. Notice that some header information may occur - * after the image data. Textual data and comments are an example; the approach - * in this file won't work reliably for such data because it only looks for the - * information in the section of the file that precedes the image data. - * - * Compile and link against libpng and zlib, plus anything else required on the - * system you use. - * - * To use supply a list of PNG files containing iCCP chunks, the chunks will be - * extracted to a similarly named file with the extension replaced by 'icc', - * which will be overwritten without warning. - */ -#include -#include -#include -#include - -#include - -#if defined(PNG_READ_SUPPORTED) && defined(PNG_STDIO_SUPPORTED) && \ - defined (PNG_iCCP_SUPPORTED) - - -static int verbose = 1; -static png_byte no_profile[] = "no profile"; - -static png_bytep -extract(FILE *fp, png_uint_32 *proflen) -{ - png_structp png_ptr = png_create_read_struct(PNG_LIBPNG_VER_STRING,0,0,0); - png_infop info_ptr = NULL; - png_bytep result = NULL; - - /* Initialize for error or no profile: */ - *proflen = 0; - - if (png_ptr == NULL) - { - fprintf(stderr, "iccfrompng: version library mismatch?\n"); - return 0; - } - - if (setjmp(png_jmpbuf(png_ptr))) - { - png_destroy_read_struct(&png_ptr, &info_ptr, NULL); - return 0; - } - - png_init_io(png_ptr, fp); - - info_ptr = png_create_info_struct(png_ptr); - if (info_ptr == NULL) - png_error(png_ptr, "OOM allocating info structure"); - - png_read_info(png_ptr, info_ptr); - - { - png_charp name; - int compression_type; - png_bytep profile; - - if (png_get_iCCP(png_ptr, info_ptr, &name, &compression_type, &profile, - proflen) & PNG_INFO_iCCP) - { - result = malloc(*proflen); - if (result != NULL) - memcpy(result, profile, *proflen); - - else - png_error(png_ptr, "OOM allocating profile buffer"); - } - - else - result = no_profile; - } - - png_destroy_read_struct(&png_ptr, &info_ptr, NULL); - return result; -} - -static int -extract_one_file(const char *filename) -{ - int result = 0; - FILE *fp = fopen(filename, "rb"); - - if (fp != NULL) - { - png_uint_32 proflen = 0; - png_bytep profile = extract(fp, &proflen); - - if (profile != NULL && profile != no_profile) - { - size_t len; - char *output; - - { - const char *ep = strrchr(filename, '.'); - - if (ep != NULL) - len = ep-filename; - - else - len = strlen(filename); - } - - output = malloc(len + 5); - if (output != NULL) - { - FILE *of; - - memcpy(output, filename, len); - strcpy(output+len, ".icc"); - - of = fopen(output, "wb"); - if (of != NULL) - { - if (fwrite(profile, proflen, 1, of) == 1 && - fflush(of) == 0 && - fclose(of) == 0) - { - if (verbose) - printf("%s -> %s\n", filename, output); - /* Success return */ - result = 1; - } - - else - { - fprintf(stderr, "%s: error writing profile\n", output); - if (remove(output)) - fprintf(stderr, "%s: could not remove file\n", output); - } - } - - else - fprintf(stderr, "%s: failed to open output file\n", output); - - free(output); - } - - else - fprintf(stderr, "%s: OOM allocating string!\n", filename); - - free(profile); - } - - else if (verbose && profile == no_profile) - printf("%s has no profile\n", filename); - } - - else - fprintf(stderr, "%s: could not open file\n", filename); - - return result; -} - -int -main(int argc, char **argv) -{ - int i; - int extracted = 0; - - for (i=1; i -#include -#include /* required for error handling */ - -/* Normally use here to get the installed libpng, but this is done to - * ensure the code picks up the local libpng implementation: - */ -#include "../../png.h" - -#if defined(PNG_READ_SUPPORTED) && defined(PNG_SEQUENTIAL_READ_SUPPORTED) - -/* Return component 'c' of pixel 'x' from the given row. */ -static unsigned int -component(png_const_bytep row, png_uint_32 x, unsigned int c, - unsigned int bit_depth, unsigned int channels) -{ - /* PNG images can be up to 2^31 pixels wide, but this means they can be up to - * 2^37 bits wide (for a 64-bit pixel - the largest possible) and hence 2^34 - * bytes wide. Since the row fitted into memory, however, the following must - * work: - */ - png_uint_32 bit_offset_hi = bit_depth * ((x >> 6) * channels); - png_uint_32 bit_offset_lo = bit_depth * ((x & 0x3f) * channels + c); - - row = (png_const_bytep)(((const png_byte (*)[8])row) + bit_offset_hi); - row += bit_offset_lo >> 3; - bit_offset_lo &= 0x07; - - /* PNG pixels are packed into bytes to put the first pixel in the highest - * bits of the byte and into two bytes for 16-bit values with the high 8 bits - * first, so: - */ - switch (bit_depth) - { - case 1: return (row[0] >> (7-bit_offset_lo)) & 0x01; - case 2: return (row[0] >> (6-bit_offset_lo)) & 0x03; - case 4: return (row[0] >> (4-bit_offset_lo)) & 0x0f; - case 8: return row[0]; - case 16: return (row[0] << 8) + row[1]; - default: - /* This should never happen; it indicates a bug in this program or in - * libpng itself: - */ - fprintf(stderr, "pngpixel: invalid bit depth %u\n", bit_depth); - exit(1); - } -} - -/* Print a pixel from a row returned by libpng; determine the row format, find - * the pixel, and print the relevant information to stdout. - */ -static void -print_pixel(png_structp png_ptr, png_infop info_ptr, png_const_bytep row, - png_uint_32 x) -{ - unsigned int bit_depth = png_get_bit_depth(png_ptr, info_ptr); - - switch (png_get_color_type(png_ptr, info_ptr)) - { - case PNG_COLOR_TYPE_GRAY: - printf("GRAY %u\n", component(row, x, 0, bit_depth, 1)); - return; - - /* The palette case is slightly more difficult - the palette and, if - * present, the tRNS ('transparency', though the values are really - * opacity) data must be read to give the full picture: - */ - case PNG_COLOR_TYPE_PALETTE: - { - int index = component(row, x, 0, bit_depth, 1); - png_colorp palette = NULL; - int num_palette = 0; - - if ((png_get_PLTE(png_ptr, info_ptr, &palette, &num_palette) & - PNG_INFO_PLTE) && num_palette > 0 && palette != NULL) - { - png_bytep trans_alpha = NULL; - int num_trans = 0; - if ((png_get_tRNS(png_ptr, info_ptr, &trans_alpha, &num_trans, - NULL) & PNG_INFO_tRNS) && num_trans > 0 && - trans_alpha != NULL) - printf("INDEXED %u = %d %d %d %d\n", index, - palette[index].red, palette[index].green, - palette[index].blue, - index < num_trans ? trans_alpha[index] : 255); - - else /* no transparency */ - printf("INDEXED %u = %d %d %d\n", index, - palette[index].red, palette[index].green, - palette[index].blue); - } - - else - printf("INDEXED %u = invalid index\n", index); - } - return; - - case PNG_COLOR_TYPE_RGB: - printf("RGB %u %u %u\n", component(row, x, 0, bit_depth, 3), - component(row, x, 1, bit_depth, 3), - component(row, x, 2, bit_depth, 3)); - return; - - case PNG_COLOR_TYPE_GRAY_ALPHA: - printf("GRAY+ALPHA %u %u\n", component(row, x, 0, bit_depth, 2), - component(row, x, 1, bit_depth, 2)); - return; - - case PNG_COLOR_TYPE_RGB_ALPHA: - printf("RGBA %u %u %u %u\n", component(row, x, 0, bit_depth, 4), - component(row, x, 1, bit_depth, 4), - component(row, x, 2, bit_depth, 4), - component(row, x, 3, bit_depth, 4)); - return; - - default: - png_error(png_ptr, "pngpixel: invalid color type"); - } -} - -int main(int argc, const char **argv) -{ - /* This program uses the default, based, libpng error handling - * mechanism, therefore any local variable that exists before the call to - * setjmp and is changed after the call to setjmp returns successfully must - * be declared with 'volatile' to ensure that their values don't get - * destroyed by longjmp: - */ - volatile int result = 1/*fail*/; - - if (argc == 4) - { - long x = atol(argv[1]); - long y = atol(argv[2]); - FILE *f = fopen(argv[3], "rb"); - volatile png_bytep row = NULL; - - if (f != NULL) - { - /* libpng requires a callback function for handling errors; this - * callback must not return. The default callback function uses a - * stored style jmp_buf which is held in a png_struct and - * writes error messages to stderr. Creating the png_struct is a - * little tricky; just copy the following code. - */ - png_structp png_ptr = png_create_read_struct(PNG_LIBPNG_VER_STRING, - NULL, NULL, NULL); - - if (png_ptr != NULL) - { - png_infop info_ptr = png_create_info_struct(png_ptr); - - if (info_ptr != NULL) - { - /* Declare stack variables to hold pointers to locally allocated - * data. - */ - - /* Initialize the error control buffer: */ - if (setjmp(png_jmpbuf(png_ptr)) == 0) - { - png_uint_32 width, height; - int bit_depth, color_type, interlace_method, - compression_method, filter_method; - png_bytep row_tmp; - - /* Now associate the recently opened (FILE*) with the default - * libpng initialization functions. Sometimes libpng is - * compiled without stdio support (it can be difficult to do - * in some environments); in that case you will have to write - * your own read callback to read data from the (FILE*). - */ - png_init_io(png_ptr, f); - - /* And read the first part of the PNG file - the header and - * all the information up to the first pixel. - */ - png_read_info(png_ptr, info_ptr); - - /* This fills in enough information to tell us the width of - * each row in bytes, allocate the appropriate amount of - * space. In this case png_malloc is used - it will not - * return if memory isn't available. - */ - row = png_malloc(png_ptr, png_get_rowbytes(png_ptr, - info_ptr)); - - /* To avoid the overhead of using a volatile auto copy row_tmp - * to a local here - just use row for the png_free below. - */ - row_tmp = row; - - /* All the information we need is in the header is returned by - * png_get_IHDR, if this fails we can now use 'png_error' to - * signal the error and return control to the setjmp above. - */ - if (png_get_IHDR(png_ptr, info_ptr, &width, &height, - &bit_depth, &color_type, &interlace_method, - &compression_method, &filter_method)) - { - int passes, pass; - - /* png_set_interlace_handling returns the number of - * passes required as well as turning on libpng's - * handling, but since we do it ourselves this is - * necessary: - */ - switch (interlace_method) - { - case PNG_INTERLACE_NONE: - passes = 1; - break; - - case PNG_INTERLACE_ADAM7: - passes = PNG_INTERLACE_ADAM7_PASSES; - break; - - default: - png_error(png_ptr, "pngpixel: unknown interlace"); - } - - /* Now read the pixels, pass-by-pass, row-by-row: */ - png_start_read_image(png_ptr); - - for (pass=0; pass -#include -#include -#include - -/* Normally use here to get the installed libpng, but this is done to - * ensure the code picks up the local libpng implementation: - */ -#include "../../png.h" -#if defined(PNG_SIMPLIFIED_READ_SUPPORTED) && \ - defined(PNG_SIMPLIFIED_WRITE_SUPPORTED) - -int main(int argc, const char **argv) -{ - int result = 1; - - if (argc == 3) - { - png_image image; - - /* Only the image structure version number needs to be set. */ - memset(&image, 0, sizeof image); - image.version = PNG_IMAGE_VERSION; - - if (png_image_begin_read_from_file(&image, argv[1])) - { - png_bytep buffer; - - /* Change this to try different formats! If you set a colormap format - * then you must also supply a colormap below. - */ - image.format = PNG_FORMAT_RGBA; - - buffer = malloc(PNG_IMAGE_SIZE(image)); - - if (buffer != NULL) - { - if (png_image_finish_read(&image, NULL/*background*/, buffer, - 0/*row_stride*/, NULL/*colormap for PNG_FORMAT_FLAG_COLORMAP */)) - { - if (png_image_write_to_file(&image, argv[2], - 0/*convert_to_8bit*/, buffer, 0/*row_stride*/, - NULL/*colormap*/)) - result = 0; - - else - fprintf(stderr, "pngtopng: write %s: %s\n", argv[2], - image.message); - } - - else - fprintf(stderr, "pngtopng: read %s: %s\n", argv[1], - image.message); - - free(buffer); - } - - else - { - fprintf(stderr, "pngtopng: out of memory: %lu bytes\n", - (unsigned long)PNG_IMAGE_SIZE(image)); - - /* This is the only place where a 'free' is required; libpng does - * the cleanup on error and success, but in this case we couldn't - * complete the read because of running out of memory and so libpng - * has not got to the point where it can do cleanup. - */ - png_image_free(&image); - } - } - - else - /* Failed to read the first argument: */ - fprintf(stderr, "pngtopng: %s: %s\n", argv[1], image.message); - } - - else - /* Wrong number of arguments */ - fprintf(stderr, "pngtopng: usage: pngtopng input-file output-file\n"); - - return result; -} -#endif /* READ && WRITE */ diff --git a/lib/libpng-1.6.37/contrib/examples/simpleover.c b/lib/libpng-1.6.37/contrib/examples/simpleover.c deleted file mode 100644 index 59dd313..0000000 --- a/lib/libpng-1.6.37/contrib/examples/simpleover.c +++ /dev/null @@ -1,648 +0,0 @@ -/*- simpleover - * - * COPYRIGHT: Written by John Cunningham Bowler, 2015. - * To the extent possible under law, the author has waived all copyright and - * related or neighboring rights to this work. This work is published from: - * United States. - * - * Read several PNG files, which should have an alpha channel or transparency - * information, and composite them together to produce one or more 16-bit linear - * RGBA intermediates. This involves doing the correct 'over' composition to - * combine the alpha channels and corresponding data. - * - * Finally read an output (background) PNG using the 24-bit RGB format (the - * PNG will be composited on green (#00ff00) by default if it has an alpha - * channel), and apply the intermediate image generated above to specified - * locations in the image. - * - * The command line has the general format: - * - * simpleover [output.png] - * {--sprite=width,height,name {[--at=x,y] {sprite.png}}} - * {--add=name {x,y}} - * - * The --sprite and --add options may occur multiple times. They are executed - * in order. --add may refer to any sprite already read. - * - * This code is intended to show how to composite multiple images together - * correctly. Apart from the libpng Simplified API the only work done in here - * is to combine multiple input PNG images into a single sprite; this involves - * a Porter-Duff 'over' operation and the input PNG images may, as a result, - * be regarded as being layered one on top of the other with the first (leftmost - * on the command line) being at the bottom and the last on the top. - */ -#include -#include -#include -#include -#include - -/* Normally use here to get the installed libpng, but this is done to - * ensure the code picks up the local libpng implementation, so long as this - * file is linked against a sufficiently recent libpng (1.6+) it is ok to - * change this to : - */ -#include "../../png.h" - -#ifdef PNG_SIMPLIFIED_READ_SUPPORTED - -#define sprite_name_chars 15 -struct sprite { - FILE *file; - png_uint_16p buffer; - unsigned int width; - unsigned int height; - char name[sprite_name_chars+1]; -}; - -#if 0 /* div by 65535 test program */ -#include -#include - -int main(void) { - double err = 0; - unsigned int xerr = 0; - unsigned int r = 32769; - { - unsigned int x = 0; - - do { - unsigned int t = x + (x >> 16) /*+ (x >> 31)*/ + r; - double v = x, errtest; - - if (t < x) { - fprintf(stderr, "overflow: %u+%u -> %u\n", x, r, t); - return 1; - } - - v /= 65535; - errtest = v; - t >>= 16; - errtest -= t; - - if (errtest > err) { - err = errtest; - xerr = x; - - if (errtest >= .5) { - fprintf(stderr, "error: %u/65535 = %f, not %u, error %f\n", - x, v, t, errtest); - return 0; - } - } - } while (++x <= 65535U*65535U); - } - - printf("error %f @ %u\n", err, xerr); - - return 0; -} -#endif /* div by 65535 test program */ - -static void -sprite_op(const struct sprite *sprite, int x_offset, int y_offset, - png_imagep image, const png_uint_16 *buffer) -{ - /* This is where the Porter-Duff 'Over' operator is evaluated; change this - * code to change the operator (this could be parameterized). Any other - * image processing operation could be used here. - */ - - - /* Check for an x or y offset that pushes any part of the image beyond the - * right or bottom of the sprite: - */ - if ((y_offset < 0 || (unsigned)/*SAFE*/y_offset < sprite->height) && - (x_offset < 0 || (unsigned)/*SAFE*/x_offset < sprite->width)) - { - unsigned int y = 0; - - if (y_offset < 0) - y = -y_offset; /* Skip to first visible row */ - - do - { - unsigned int x = 0; - - if (x_offset < 0) - x = -x_offset; - - do - { - /* In and out are RGBA values, so: */ - const png_uint_16 *in_pixel = buffer + (y * image->width + x)*4; - png_uint_32 in_alpha = in_pixel[3]; - - /* This is the optimized Porter-Duff 'Over' operation, when the - * input alpha is 0 the output is not changed. - */ - if (in_alpha > 0) - { - png_uint_16 *out_pixel = sprite->buffer + - ((y+y_offset) * sprite->width + (x+x_offset))*4; - - /* This is the weight to apply to the output: */ - in_alpha = 65535-in_alpha; - - if (in_alpha > 0) - { - /* The input must be composed onto the output. This means - * multiplying the current output pixel value by the inverse - * of the input alpha (1-alpha). A division is required but - * it is by the constant 65535. Approximate this as: - * - * (x + (x >> 16) + 32769) >> 16; - * - * This is exact (and does not overflow) for all values of - * x in the range 0..65535*65535. (Note that the calculation - * produces the closest integer; the maximum error is <0.5). - */ - png_uint_32 tmp; - -# define compose(c)\ - tmp = out_pixel[c] * in_alpha;\ - tmp = (tmp + (tmp >> 16) + 32769) >> 16;\ - out_pixel[c] = tmp + in_pixel[c] - - /* The following is very vectorizable... */ - compose(0); - compose(1); - compose(2); - compose(3); - } - - else - out_pixel[0] = in_pixel[0], - out_pixel[1] = in_pixel[1], - out_pixel[2] = in_pixel[2], - out_pixel[3] = in_pixel[3]; - } - } - while (++x < image->width); - } - while (++y < image->height); - } -} - -static int -create_sprite(struct sprite *sprite, int *argc, const char ***argv) -{ - /* Read the arguments and create this sprite. The sprite buffer has already - * been allocated. This reads the input PNGs one by one in linear format, - * composes them onto the sprite buffer (the code in the function above) - * then saves the result, converting it on the fly to PNG RGBA 8-bit format. - */ - while (*argc > 0) - { - char tombstone; - int x = 0, y = 0; - - if ((*argv)[0][0] == '-' && (*argv)[0][1] == '-') - { - /* The only supported option is --at. */ - if (sscanf((*argv)[0], "--at=%d,%d%c", &x, &y, &tombstone) != 2) - break; /* success; caller will parse this option */ - - ++*argv, --*argc; - } - - else - { - /* The argument has to be a file name */ - png_image image; - - image.version = PNG_IMAGE_VERSION; - image.opaque = NULL; - - if (png_image_begin_read_from_file(&image, (*argv)[0])) - { - png_uint_16p buffer; - - image.format = PNG_FORMAT_LINEAR_RGB_ALPHA; - - buffer = malloc(PNG_IMAGE_SIZE(image)); - - if (buffer != NULL) - { - if (png_image_finish_read(&image, NULL/*background*/, buffer, - 0/*row_stride*/, - NULL/*colormap for PNG_FORMAT_FLAG_COLORMAP*/)) - { - /* This is the place where the Porter-Duff 'Over' operator - * needs to be done by this code. In fact, any image - * processing required can be done here; the data is in - * the correct format (linear, 16-bit) and source and - * destination are in memory. - */ - sprite_op(sprite, x, y, &image, buffer); - free(buffer); - ++*argv, --*argc; - /* And continue to the next argument */ - continue; - } - - else - { - free(buffer); - fprintf(stderr, "simpleover: read %s: %s\n", (*argv)[0], - image.message); - } - } - - else - { - fprintf(stderr, "simpleover: out of memory: %lu bytes\n", - (unsigned long)PNG_IMAGE_SIZE(image)); - - /* png_image_free must be called if we abort the Simplified API - * read because of a problem detected in this code. If problems - * are detected in the Simplified API it cleans up itself. - */ - png_image_free(&image); - } - } - - else - { - /* Failed to read the first argument: */ - fprintf(stderr, "simpleover: %s: %s\n", (*argv)[0], image.message); - } - - return 0; /* failure */ - } - } - - /* All the sprite operations have completed successfully. Save the RGBA - * buffer as a PNG using the simplified write API. - */ - sprite->file = tmpfile(); - - if (sprite->file != NULL) - { - png_image save; - - memset(&save, 0, sizeof save); - save.version = PNG_IMAGE_VERSION; - save.opaque = NULL; - save.width = sprite->width; - save.height = sprite->height; - save.format = PNG_FORMAT_LINEAR_RGB_ALPHA; - save.flags = PNG_IMAGE_FLAG_FAST; - save.colormap_entries = 0; - - if (png_image_write_to_stdio(&save, sprite->file, 1/*convert_to_8_bit*/, - sprite->buffer, 0/*row_stride*/, NULL/*colormap*/)) - { - /* Success; the buffer is no longer needed: */ - free(sprite->buffer); - sprite->buffer = NULL; - return 1; /* ok */ - } - - else - fprintf(stderr, "simpleover: write sprite %s: %s\n", sprite->name, - save.message); - } - - else - fprintf(stderr, "simpleover: sprite %s: could not allocate tmpfile: %s\n", - sprite->name, strerror(errno)); - - return 0; /* fail */ -} - -static int -add_sprite(png_imagep output, png_bytep out_buf, struct sprite *sprite, - int *argc, const char ***argv) -{ - /* Given a --add argument naming this sprite, perform the operations listed - * in the following arguments. The arguments are expected to have the form - * (x,y), which is just an offset at which to add the sprite to the - * output. - */ - while (*argc > 0) - { - char tombstone; - int x, y; - - if ((*argv)[0][0] == '-' && (*argv)[0][1] == '-') - return 1; /* success */ - - if (sscanf((*argv)[0], "%d,%d%c", &x, &y, &tombstone) == 2) - { - /* Now add the new image into the sprite data, but only if it - * will fit. - */ - if (x < 0 || y < 0 || - (unsigned)/*SAFE*/x >= output->width || - (unsigned)/*SAFE*/y >= output->height || - sprite->width > output->width-x || - sprite->height > output->height-y) - { - fprintf(stderr, "simpleover: sprite %s @ (%d,%d) outside image\n", - sprite->name, x, y); - /* Could just skip this, but for the moment it is an error */ - return 0; /* error */ - } - - else - { - /* Since we know the sprite fits we can just read it into the - * output using the simplified API. - */ - png_image in; - - in.version = PNG_IMAGE_VERSION; - rewind(sprite->file); - - if (png_image_begin_read_from_stdio(&in, sprite->file)) - { - in.format = PNG_FORMAT_RGB; /* force compose */ - - if (png_image_finish_read(&in, NULL/*background*/, - out_buf + (y*output->width + x)*3/*RGB*/, - output->width*3/*row_stride*/, - NULL/*colormap for PNG_FORMAT_FLAG_COLORMAP*/)) - { - ++*argv, --*argc; - continue; - } - } - - /* The read failed: */ - fprintf(stderr, "simpleover: add sprite %s: %s\n", sprite->name, - in.message); - return 0; /* error */ - } - } - - else - { - fprintf(stderr, "simpleover: --add='%s': invalid position %s\n", - sprite->name, (*argv)[0]); - return 0; /* error */ - } - } - - return 1; /* ok */ -} - -static int -simpleover_process(png_imagep output, png_bytep out_buf, int argc, - const char **argv) -{ - int result = 1; /* success */ -# define csprites 10/*limit*/ -# define str(a) #a - int nsprites = 0; - struct sprite sprites[csprites]; - - while (argc > 0) - { - result = 0; /* fail */ - - if (strncmp(argv[0], "--sprite=", 9) == 0) - { - char tombstone; - - if (nsprites < csprites) - { - int n; - - sprites[nsprites].width = sprites[nsprites].height = 0; - sprites[nsprites].name[0] = 0; - - n = sscanf(argv[0], "--sprite=%u,%u,%" str(sprite_name_chars) "s%c", - &sprites[nsprites].width, &sprites[nsprites].height, - sprites[nsprites].name, &tombstone); - - if ((n == 2 || n == 3) && - sprites[nsprites].width > 0 && sprites[nsprites].height > 0) - { - size_t buf_size, tmp; - - /* Default a name if not given. */ - if (sprites[nsprites].name[0] == 0) - sprintf(sprites[nsprites].name, "sprite-%d", nsprites+1); - - /* Allocate a buffer for the sprite and calculate the buffer - * size: - */ - buf_size = sizeof (png_uint_16 [4]); - buf_size *= sprites[nsprites].width; - buf_size *= sprites[nsprites].height; - - /* This can overflow a (size_t); check for this: */ - tmp = buf_size; - tmp /= sprites[nsprites].width; - tmp /= sprites[nsprites].height; - - if (tmp == sizeof (png_uint_16 [4])) - { - sprites[nsprites].buffer = malloc(buf_size); - /* This buffer must be initialized to transparent: */ - memset(sprites[nsprites].buffer, 0, buf_size); - - if (sprites[nsprites].buffer != NULL) - { - sprites[nsprites].file = NULL; - ++argv, --argc; - - if (create_sprite(sprites+nsprites++, &argc, &argv)) - { - result = 1; /* still ok */ - continue; - } - - break; /* error */ - } - } - - /* Overflow, or OOM */ - fprintf(stderr, "simpleover: %s: sprite too large\n", argv[0]); - break; - } - - else - { - fprintf(stderr, "simpleover: %s: invalid sprite (%u,%u)\n", - argv[0], sprites[nsprites].width, sprites[nsprites].height); - break; - } - } - - else - { - fprintf(stderr, "simpleover: %s: too many sprites\n", argv[0]); - break; - } - } - - else if (strncmp(argv[0], "--add=", 6) == 0) - { - const char *name = argv[0]+6; - int isprite = nsprites; - - ++argv, --argc; - - while (--isprite >= 0) - { - if (strcmp(sprites[isprite].name, name) == 0) - { - if (!add_sprite(output, out_buf, sprites+isprite, &argc, &argv)) - goto out; /* error in add_sprite */ - - break; - } - } - - if (isprite < 0) /* sprite not found */ - { - fprintf(stderr, "simpleover: --add='%s': sprite not found\n", name); - break; - } - } - - else - { - fprintf(stderr, "simpleover: %s: unrecognized operation\n", argv[0]); - break; - } - - result = 1; /* ok */ - } - - /* Clean up the cache of sprites: */ -out: - while (--nsprites >= 0) - { - if (sprites[nsprites].buffer != NULL) - free(sprites[nsprites].buffer); - - if (sprites[nsprites].file != NULL) - (void)fclose(sprites[nsprites].file); - } - - return result; -} - -int main(int argc, const char **argv) -{ - int result = 1; /* default to fail */ - - if (argc >= 2) - { - int argi = 2; - const char *output = NULL; - png_image image; - - if (argc > 2 && argv[2][0] != '-'/*an operation*/) - { - output = argv[2]; - argi = 3; - } - - image.version = PNG_IMAGE_VERSION; - image.opaque = NULL; - - if (png_image_begin_read_from_file(&image, argv[1])) - { - png_bytep buffer; - - image.format = PNG_FORMAT_RGB; /* 24-bit RGB */ - - buffer = malloc(PNG_IMAGE_SIZE(image)); - - if (buffer != NULL) - { - png_color background = {0, 0xff, 0}; /* fully saturated green */ - - if (png_image_finish_read(&image, &background, buffer, - 0/*row_stride*/, NULL/*colormap for PNG_FORMAT_FLAG_COLORMAP */)) - { - /* At this point png_image_finish_read has cleaned up the - * allocated data in png_image, and only the buffer needs to be - * freed. - * - * Perform the remaining operations: - */ - if (simpleover_process(&image, buffer, argc-argi, argv+argi)) - { - /* Write the output: */ - if ((output != NULL && - png_image_write_to_file(&image, output, - 0/*convert_to_8bit*/, buffer, 0/*row_stride*/, - NULL/*colormap*/)) || - (output == NULL && - png_image_write_to_stdio(&image, stdout, - 0/*convert_to_8bit*/, buffer, 0/*row_stride*/, - NULL/*colormap*/))) - result = 0; - - else - fprintf(stderr, "simpleover: write %s: %s\n", - output == NULL ? "stdout" : output, image.message); - } - - /* else simpleover_process writes an error message */ - } - - else - fprintf(stderr, "simpleover: read %s: %s\n", argv[1], - image.message); - - free(buffer); - } - - else - { - fprintf(stderr, "simpleover: out of memory: %lu bytes\n", - (unsigned long)PNG_IMAGE_SIZE(image)); - - /* This is the only place where a 'free' is required; libpng does - * the cleanup on error and success, but in this case we couldn't - * complete the read because of running out of memory. - */ - png_image_free(&image); - } - } - - else - { - /* Failed to read the first argument: */ - fprintf(stderr, "simpleover: %s: %s\n", argv[1], image.message); - } - } - - else - { - /* Usage message */ - fprintf(stderr, - "simpleover: usage: simpleover background.png [output.png]\n" - " Output 'background.png' as a 24-bit RGB PNG file in 'output.png'\n" - " or, if not given, stdout. 'background.png' will be composited\n" - " on fully saturated green.\n" - "\n" - " Optionally, before output, process additional PNG files:\n" - "\n" - " --sprite=width,height,name {[--at=x,y] {sprite.png}}\n" - " Produce a transparent sprite of size (width,height) and with\n" - " name 'name'.\n" - " For each sprite.png composite it using a Porter-Duff 'Over'\n" - " operation at offset (x,y) in the sprite (defaulting to (0,0)).\n" - " Input PNGs will be truncated to the area of the sprite.\n" - "\n" - " --add='name' {x,y}\n" - " Optionally, before output, composite a sprite, 'name', which\n" - " must have been previously produced using --sprite, at each\n" - " offset (x,y) in the output image. Each sprite must fit\n" - " completely within the output image.\n" - "\n" - " PNG files are processed in the order they occur on the command\n" - " line and thus the first PNG processed appears as the bottommost\n" - " in the output image.\n"); - } - - return result; -} -#endif /* SIMPLIFIED_READ */ diff --git a/lib/libpng-1.6.37/contrib/gregbook/COPYING b/lib/libpng-1.6.37/contrib/gregbook/COPYING deleted file mode 100644 index a3e9774..0000000 --- a/lib/libpng-1.6.37/contrib/gregbook/COPYING +++ /dev/null @@ -1,340 +0,0 @@ - GNU GENERAL PUBLIC LICENSE - Version 2, June 1991 - - Copyright (C) 1989, 1991 Free Software Foundation, Inc. - 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA - Everyone is permitted to copy and distribute verbatim copies - of this license document, but changing it is not allowed. - - Preamble - - The licenses for most software are designed to take away your -freedom to share and change it. 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For software which is copyrighted by the Free -Software Foundation, write to the Free Software Foundation; we sometimes -make exceptions for this. Our decision will be guided by the two goals -of preserving the free status of all derivatives of our free software and -of promoting the sharing and reuse of software generally. - - NO WARRANTY - - 11. BECAUSE THE PROGRAM IS LICENSED FREE OF CHARGE, THERE IS NO WARRANTY -FOR THE PROGRAM, TO THE EXTENT PERMITTED BY APPLICABLE LAW. EXCEPT WHEN -OTHERWISE STATED IN WRITING THE COPYRIGHT HOLDERS AND/OR OTHER PARTIES -PROVIDE THE PROGRAM "AS IS" WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESSED -OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF -MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. THE ENTIRE RISK AS -TO THE QUALITY AND PERFORMANCE OF THE PROGRAM IS WITH YOU. SHOULD THE -PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF ALL NECESSARY SERVICING, -REPAIR OR CORRECTION. - - 12. IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING -WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MAY MODIFY AND/OR -REDISTRIBUTE THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES, -INCLUDING ANY GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING -OUT OF THE USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED -TO LOSS OF DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY -YOU OR THIRD PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER -PROGRAMS), EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE -POSSIBILITY OF SUCH DAMAGES. - - END OF TERMS AND CONDITIONS - - How to Apply These Terms to Your New Programs - - If you develop a new program, and you want it to be of the greatest -possible use to the public, the best way to achieve this is to make it -free software which everyone can redistribute and change under these terms. - - To do so, attach the following notices to the program. It is safest -to attach them to the start of each source file to most effectively -convey the exclusion of warranty; and each file should have at least -the "copyright" line and a pointer to where the full notice is found. - - - Copyright (C) - - This program is free software; you can redistribute it and/or modify - it under the terms of the GNU General Public License as published by - the Free Software Foundation; either version 2 of the License, or - (at your option) any later version. - - This program is distributed in the hope that it will be useful, - but WITHOUT ANY WARRANTY; without even the implied warranty of - MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - GNU General Public License for more details. - - You should have received a copy of the GNU General Public License - along with this program; if not, write to the Free Software - Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA - - -Also add information on how to contact you by electronic and paper mail. - -If the program is interactive, make it output a short notice like this -when it starts in an interactive mode: - - Gnomovision version 69, Copyright (C) year name of author - Gnomovision comes with ABSOLUTELY NO WARRANTY; for details type `show w'. - This is free software, and you are welcome to redistribute it - under certain conditions; type `show c' for details. - -The hypothetical commands `show w' and `show c' should show the appropriate -parts of the General Public License. Of course, the commands you use may -be called something other than `show w' and `show c'; they could even be -mouse-clicks or menu items--whatever suits your program. - -You should also get your employer (if you work as a programmer) or your -school, if any, to sign a "copyright disclaimer" for the program, if -necessary. Here is a sample; alter the names: - - Yoyodyne, Inc., hereby disclaims all copyright interest in the program - `Gnomovision' (which makes passes at compilers) written by James Hacker. - - , 1 April 1989 - Ty Coon, President of Vice - -This General Public License does not permit incorporating your program into -proprietary programs. If your program is a subroutine library, you may -consider it more useful to permit linking proprietary applications with the -library. If this is what you want to do, use the GNU Library General -Public License instead of this License. diff --git a/lib/libpng-1.6.37/contrib/gregbook/LICENSE b/lib/libpng-1.6.37/contrib/gregbook/LICENSE deleted file mode 100644 index d956717..0000000 --- a/lib/libpng-1.6.37/contrib/gregbook/LICENSE +++ /dev/null @@ -1,50 +0,0 @@ - --------------------------------------------------------------------------- - - Copyright (c) 1998-2008 Greg Roelofs. All rights reserved. - - This software is provided "as is," without warranty of any kind, - express or implied. In no event shall the author or contributors - be held liable for any damages arising in any way from the use of - this software. - - The contents of this file are DUAL-LICENSED. You may modify and/or - redistribute this software according to the terms of one of the - following two licenses (at your option): - - - LICENSE 1 ("BSD-like with advertising clause"): - - Permission is granted to anyone to use this software for any purpose, - including commercial applications, and to alter it and redistribute - it freely, subject to the following restrictions: - - 1. Redistributions of source code must retain the above copyright - notice, disclaimer, and this list of conditions. - 2. Redistributions in binary form must reproduce the above copyright - notice, disclaimer, and this list of conditions in the documenta- - tion and/or other materials provided with the distribution. - 3. All advertising materials mentioning features or use of this - software must display the following acknowledgment: - - This product includes software developed by Greg Roelofs - and contributors for the book, "PNG: The Definitive Guide," - published by O'Reilly and Associates. - - - LICENSE 2 (GNU GPL v2 or later): - - This program is free software; you can redistribute it and/or modify - it under the terms of the GNU General Public License as published by - the Free Software Foundation; either version 2 of the License, or - (at your option) any later version. - - This program is distributed in the hope that it will be useful, - but WITHOUT ANY WARRANTY; without even the implied warranty of - MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - GNU General Public License for more details. - - You should have received a copy of the GNU General Public License - along with this program; if not, write to the Free Software Foundation, - Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA - - --------------------------------------------------------------------------- diff --git a/lib/libpng-1.6.37/contrib/gregbook/Makefile.mingw32 b/lib/libpng-1.6.37/contrib/gregbook/Makefile.mingw32 deleted file mode 100644 index 3a3ff60..0000000 --- a/lib/libpng-1.6.37/contrib/gregbook/Makefile.mingw32 +++ /dev/null @@ -1,131 +0,0 @@ -# Sample makefile for rpng-win / rpng2-win / wpng using mingw32-gcc and make. -# Greg Roelofs -# Last modified: 2 June 2007 -# -# The programs built by this makefile are described in the book, -# "PNG: The Definitive Guide," by Greg Roelofs (O'Reilly and -# Associates, 1999). Go buy a copy, eh? Well, OK, it's not -# generally for sale anymore, but it's the thought that counts, -# right? (Hint: http://www.libpng.org/pub/png/book/ ) -# -# Invoke this makefile from a DOS-prompt window via: -# -# make -f Makefile.mingw32 -# -# This makefile assumes libpng and zlib have already been built or downloaded -# and are in subdirectories at the same level as the current subdirectory -# (as indicated by the PNGDIR and ZDIR macros below). It makes no assumptions -# at all about the mingw32 installation tree (W32DIR). Edit as appropriate. -# -# Note that the names of the dynamic and static libpng and zlib libraries -# used below may change in later releases of the libraries. This makefile -# builds both statically and dynamically linked executables by default. -# (You need only one set, but for testing it can be handy to have both.) - - -# macros -------------------------------------------------------------------- - -#PNGDIR = ../..# for libpng-x.y.z/contrib/gregbook builds -PNGDIR = ../libpng-win32 -PNGINC = -I$(PNGDIR) -PNGLIBd = $(PNGDIR)/libpng.dll.a # dynamically linked -PNGLIBs = $(PNGDIR)/libpng.a # statically linked, local libpng - -#ZDIR = ../../../zlib-win32# for libpng-x.y.z/contrib/gregbook builds -ZDIR = ../zlib-win32 -ZINC = -I$(ZDIR) -ZLIBd = $(ZDIR)/libzdll.a -ZLIBs = $(ZDIR)/libz.a - -# change this to be the path where mingw32 installs its stuff: -W32DIR = -#W32DIR = /usr/local/cross-tools/i386-mingw32msvc -W32INC = -I$(W32DIR)/include -W32LIB = $(W32DIR)/lib/libuser32.a $(W32DIR)/lib/libgdi32.a - -CC = gcc -#CC = i386-mingw32msvc-gcc # e.g., Linux -> Win32 cross-compilation -LD = $(CC) -RM = rm -f -CPPFLAGS = $(INCS) -CFLAGS = -O -Wall $(MINGW_CCFLAGS) -# [note that -Wall is a gcc-specific compilation flag ("most warnings on")] -# [-ansi, -pedantic and -W can also be used] -LDFLAGS = $(MINGW_LDFLAGS) -O = .o -E = .exe - -INCS = $(PNGINC) $(ZINC) $(W32INC) -RLIBSd = $(PNGLIBd) $(ZLIBd) $(W32LIB) -lm -RLIBSs = $(PNGLIBs) $(ZLIBs) $(W32LIB) -lm -WLIBSd = $(PNGLIBd) $(ZLIBd) -WLIBSs = $(PNGLIBs) $(ZLIBs) - -RPNG = rpng-win -RPNG2 = rpng2-win -WPNG = wpng - -ROBJSd = $(RPNG)$(O) readpng.pic$(O) -ROBJS2d = $(RPNG2)$(O) readpng2.pic$(O) -WOBJSd = $(WPNG)$(O) writepng.pic$(O) - -RPNGs = $(RPNG)-static -RPNG2s = $(RPNG2)-static -WPNGs = $(WPNG)-static - -ROBJSs = $(RPNG)$(O) readpng$(O) -ROBJS2s = $(RPNG2)$(O) readpng2$(O) -WOBJSs = $(WPNG)$(O) writepng$(O) - -STATIC_EXES = $(RPNGs)$(E) $(RPNG2s)$(E) $(WPNGs)$(E) -DYNAMIC_EXES = $(RPNG)$(E) $(RPNG2)$(E) $(WPNG)$(E) - -EXES = $(STATIC_EXES) $(DYNAMIC_EXES) - - -# implicit make rules ------------------------------------------------------- - -.c$(O): - $(CC) -c $(CPPFLAGS) $(CFLAGS) $< - -%.pic$(O): %.c - $(CC) -c $(CPPFLAGS) $(CFLAGS) -DPNG_BUILD_DLL -o $@ $< - - -# dependencies -------------------------------------------------------------- - -all: $(EXES) - -$(RPNGs)$(E): $(ROBJSs) - $(LD) $(LDFLAGS) -o $@ $(ROBJSs) $(RLIBSs) - -$(RPNG)$(E): $(ROBJSd) - $(LD) $(LDFLAGS) -o $@ $(ROBJSd) $(RLIBSd) - -$(RPNG2s)$(E): $(ROBJS2s) - $(LD) $(LDFLAGS) -o $@ $(ROBJS2s) $(RLIBSs) - -$(RPNG2)$(E): $(ROBJS2d) - $(LD) $(LDFLAGS) -o $@ $(ROBJS2d) $(RLIBSd) - -$(WPNGs)$(E): $(WOBJSs) - $(LD) $(LDFLAGS) -o $@ $(WOBJSs) $(WLIBSs) - -$(WPNG)$(E): $(WOBJSd) - $(LD) $(LDFLAGS) -o $@ $(WOBJSd) $(WLIBSd) - -$(RPNG)$(O): $(RPNG).c readpng.h -$(RPNG2)$(O): $(RPNG2).c readpng2.h -$(WPNG)$(O): $(WPNG).c writepng.h - -readpng$(O) readpng.pic$(O): readpng.c readpng.h -readpng2$(O) readpng2.pic$(O): readpng2.c readpng2.h -writepng$(O) writepng.pic$(O): writepng.c writepng.h - - -# maintenance --------------------------------------------------------------- - -clean: - $(RM) $(EXES) - $(RM) $(ROBJSs) $(ROBJS2s) $(WOBJSs) - $(RM) $(ROBJSd) $(ROBJS2d) $(WOBJSd) diff --git a/lib/libpng-1.6.37/contrib/gregbook/Makefile.sgi b/lib/libpng-1.6.37/contrib/gregbook/Makefile.sgi deleted file mode 100644 index 94d61b4..0000000 --- a/lib/libpng-1.6.37/contrib/gregbook/Makefile.sgi +++ /dev/null @@ -1,105 +0,0 @@ -# Sample makefile for rpng-x / rpng2-x / wpng for SGI using cc and make. -# Greg Roelofs -# Last modified: 7 March 2002 -# -# The programs built by this makefile are described in the book, -# "PNG: The Definitive Guide," by Greg Roelofs (O'Reilly and -# Associates, 1999). Go buy a copy, eh? Buy some for friends -# and family, too. (Not that this is a blatant plug or anything.) -# -# Invoke this makefile from a shell prompt in the usual way; for example: -# -# make -f Makefile.sgi -# -# This makefile assumes libpng and zlib have already been built or downloaded -# and are both installed in /usr/local/{include,lib} (as indicated by the -# PNG* and Z* macros below). Edit as appropriate--choose only ONE each of -# the PNGINC, PNGLIB, ZINC and ZLIB lines. -# -# This makefile builds dynamically linked executables (against libpng and zlib, -# that is), but that can be changed by uncommenting the appropriate PNGLIB and -# ZLIB lines. - - -# macros -------------------------------------------------------------------- - -PNGINC = -I/usr/local/include/libpng16 -PNGLIB = -L/usr/local/lib -lpng16 # dynamically linked against libpng -#PNGLIB = /usr/local/lib/libpng16.a # statically linked against libpng -# or: -#PNGINC = -I../.. -#PNGLIB = -L../.. -lpng -#PNGLIB = ../../libpng.a - -ZINC = -I/usr/local/include -ZLIB = -L/usr/local/lib -lz # dynamically linked against zlib -#ZLIB = /usr/local/lib/libz.a # statically linked against zlib -#ZINC = -I../zlib -#ZLIB = -L../zlib -lz -#ZLIB = ../../../zlib/libz.a - -XINC = -I/usr/include/X11 # old-style, stock X distributions -XLIB = -L/usr/lib/X11 -lX11 -#XINC = -I/usr/openwin/include # Sun workstations (OpenWindows) -#XLIB = -L/usr/openwin/lib -lX11 -#XINC = -I/usr/X11R6/include # new X distributions (XFree86, etc.) -#XLIB = -L/usr/X11R6/lib -lX11 - -INCS = $(PNGINC) $(ZINC) $(XINC) -RLIBS = $(PNGLIB) $(ZLIB) $(XLIB) -lm -WLIBS = $(PNGLIB) $(ZLIB) - -CC = cc -LD = cc -RM = rm -f -# ABI must be the same as that used to build libpng. -ABI = -CPPFLAGS = -CFLAGS = $(ABI) -O -fullwarn $(INCS) -LDFLAGS = $(ABI) -O = .o -E = - -RPNG = rpng-x -RPNG2 = rpng2-x -WPNG = wpng - -ROBJS = $(RPNG)$(O) readpng$(O) -ROBJS2 = $(RPNG2)$(O) readpng2$(O) -WOBJS = $(WPNG)$(O) writepng$(O) - -EXES = $(RPNG)$(E) $(RPNG2)$(E) $(WPNG)$(E) - - -# implicit make rules ------------------------------------------------------- - -.c$(O): - $(CC) -c $(CPPFLAGS) $(CFLAGS) $< - - -# dependencies -------------------------------------------------------------- - -all: $(EXES) - -$(RPNG)$(E): $(ROBJS) - $(LD) $(LDFLAGS) -o $@ $(ROBJS) $(RLIBS) - -$(RPNG2)$(E): $(ROBJS2) - $(LD) $(LDFLAGS) -o $@ $(ROBJS2) $(RLIBS) - -$(WPNG)$(E): $(WOBJS) - $(LD) $(LDFLAGS) -o $@ $(WOBJS) $(WLIBS) - -$(RPNG)$(O): $(RPNG).c readpng.h -$(RPNG2)$(O): $(RPNG2).c readpng2.h -$(WPNG)$(O): $(WPNG).c writepng.h - -readpng$(O): readpng.c readpng.h -readpng2$(O): readpng2.c readpng2.h -writepng$(O): writepng.c writepng.h - - -# maintenance --------------------------------------------------------------- - -clean: - $(RM) $(EXES) $(ROBJS) $(ROBJS2) $(WOBJS) diff --git a/lib/libpng-1.6.37/contrib/gregbook/Makefile.unx b/lib/libpng-1.6.37/contrib/gregbook/Makefile.unx deleted file mode 100644 index 1a73e03..0000000 --- a/lib/libpng-1.6.37/contrib/gregbook/Makefile.unx +++ /dev/null @@ -1,134 +0,0 @@ -# Sample makefile for rpng-x / rpng2-x / wpng using gcc and make. -# Greg Roelofs -# Last modified: 2 June 2007 -# -# The programs built by this makefile are described in the book, -# "PNG: The Definitive Guide," by Greg Roelofs (O'Reilly and -# Associates, 1999). Go buy a copy, eh? Well, OK, it's not -# generally for sale anymore, but it's the thought that counts, -# right? (Hint: http://www.libpng.org/pub/png/book/ ) -# -# Invoke this makefile from a shell prompt in the usual way; for example: -# -# make -f Makefile.unx -# -# This makefile assumes libpng and zlib have already been built or downloaded -# and are installed in /usr/local/{include,lib} or as otherwise indicated by -# the PNG* and Z* macros below. Edit as appropriate--choose only ONE each of -# the PNGINC, PNGLIBd, PNGLIBs, ZINC, ZLIBd and ZLIBs lines. -# -# This makefile builds both dynamically and statically linked executables -# (against libpng and zlib, that is), but that can be changed by modifying -# the "EXES =" line. (You need only one set, but for testing it can be handy -# to have both.) - - -# macros -------------------------------------------------------------------- - -#PNGDIR = /usr/local/lib -#PNGINC = -I/usr/local/include/libpng16 -#PNGLIBd = -L$(PNGDIR) -lpng16 # dynamically linked, installed libpng -#PNGLIBs = $(PNGDIR)/libpng16.a # statically linked, installed libpng -# or: -PNGDIR = ../..# this one is for libpng-x.y.z/contrib/gregbook builds -#PNGDIR = ../libpng -PNGINC = -I$(PNGDIR) -PNGLIBd = -Wl,-rpath,$(PNGDIR) -L$(PNGDIR) -lpng16 # dynamically linked -PNGLIBs = $(PNGDIR)/libpng.a # statically linked, local libpng - -ZDIR = /usr/local/lib -#ZDIR = /usr/lib64 -ZINC = -I/usr/local/include -ZLIBd = -L$(ZDIR) -lz # dynamically linked against zlib -ZLIBs = $(ZDIR)/libz.a # statically linked against zlib -# or: -#ZDIR = ../zlib -#ZINC = -I$(ZDIR) -#ZLIBd = -Wl,-rpath,$(ZDIR) -L$(ZDIR) -lz # -rpath allows in-place testing -#ZLIBs = $(ZDIR)/libz.a - -#XINC = -I/usr/include # old-style, stock X distributions -#XLIB = -L/usr/lib/X11 -lX11 # (including SGI IRIX) -#XINC = -I/usr/openwin/include # Sun workstations (OpenWindows) -#XLIB = -L/usr/openwin/lib -lX11 -XINC = -I/usr/X11R6/include # new X distributions (X.org, etc.) -XLIB = -L/usr/X11R6/lib -lX11 -#XLIB = -L/usr/X11R6/lib64 -lX11 # e.g., Red Hat on AMD64 - -INCS = $(PNGINC) $(ZINC) $(XINC) -RLIBSd = $(PNGLIBd) $(ZLIBd) $(XLIB) -lm -RLIBSs = $(PNGLIBs) $(ZLIBs) $(XLIB) -lm -WLIBSd = $(PNGLIBd) $(ZLIBd) -lm -WLIBSs = $(PNGLIBs) $(ZLIBs) -lm - -CC = gcc -LD = gcc -RM = rm -f -CPPFLAGS = $(INCS) -DFEATURE_LOOP -CFLAGS = -O -Wall -#CFLAGS = -O -W -Wall -Wextra -pedantic -ansi -# [note that -Wall is a gcc-specific compilation flag ("most warnings on")] -# [-ansi, -pedantic, -Wextra, and -W can also be used] -LDFLAGS = -O = .o -E = - -RPNG = rpng-x -RPNG2 = rpng2-x -WPNG = wpng - -RPNGs = $(RPNG)-static -RPNG2s = $(RPNG2)-static -WPNGs = $(WPNG)-static - -ROBJS = $(RPNG)$(O) readpng$(O) -ROBJS2 = $(RPNG2)$(O) readpng2$(O) -WOBJS = $(WPNG)$(O) writepng$(O) - -STATIC_EXES = $(RPNGs)$(E) $(RPNG2s)$(E) $(WPNGs)$(E) -DYNAMIC_EXES = $(RPNG)$(E) $(RPNG2)$(E) $(WPNG)$(E) - -EXES = $(STATIC_EXES) $(DYNAMIC_EXES) - - -# implicit make rules ------------------------------------------------------- - -.c$(O): - $(CC) -c $(CPPFLAGS) $(CFLAGS) $< - - -# dependencies -------------------------------------------------------------- - -all: $(EXES) - -$(RPNGs)$(E): $(ROBJS) - $(LD) $(LDFLAGS) -o $@ $(ROBJS) $(RLIBSs) - -$(RPNG)$(E): $(ROBJS) - $(LD) $(LDFLAGS) -o $@ $(ROBJS) $(RLIBSd) - -$(RPNG2s)$(E): $(ROBJS2) - $(LD) $(LDFLAGS) -o $@ $(ROBJS2) $(RLIBSs) - -$(RPNG2)$(E): $(ROBJS2) - $(LD) $(LDFLAGS) -o $@ $(ROBJS2) $(RLIBSd) - -$(WPNGs)$(E): $(WOBJS) - $(LD) $(LDFLAGS) -o $@ $(WOBJS) $(WLIBSs) - -$(WPNG)$(E): $(WOBJS) - $(LD) $(LDFLAGS) -o $@ $(WOBJS) $(WLIBSd) - -$(RPNG)$(O): $(RPNG).c readpng.h -$(RPNG2)$(O): $(RPNG2).c readpng2.h -$(WPNG)$(O): $(WPNG).c writepng.h - -readpng$(O): readpng.c readpng.h -readpng2$(O): readpng2.c readpng2.h -writepng$(O): writepng.c writepng.h - - -# maintenance --------------------------------------------------------------- - -clean: - $(RM) $(EXES) $(ROBJS) $(ROBJS2) $(WOBJS) diff --git a/lib/libpng-1.6.37/contrib/gregbook/Makefile.w32 b/lib/libpng-1.6.37/contrib/gregbook/Makefile.w32 deleted file mode 100644 index ab7dcf7..0000000 --- a/lib/libpng-1.6.37/contrib/gregbook/Makefile.w32 +++ /dev/null @@ -1,114 +0,0 @@ -# Sample makefile for rpng-win / rpng2-win / wpng using MSVC and NMAKE. -# Greg Roelofs -# Last modified: 2 June 2007 -# -# The programs built by this makefile are described in the book, -# "PNG: The Definitive Guide," by Greg Roelofs (O'Reilly and -# Associates, 1999). Go buy a copy, eh? Well, OK, it's not -# generally for sale anymore, but it's the thought that counts, -# right? (Hint: http://www.libpng.org/pub/png/book/ ) -# -# Invoke this makefile from a DOS prompt window via: -# -# %devstudio%\vc\bin\vcvars32.bat -# nmake -nologo -f Makefile.w32 -# -# where %devstudio% is the installation directory for MSVC / DevStudio. If -# you get "environment out of space" errors, create a desktop shortcut with -# "c:\windows\command.com /e:4096" as the program command line and set the -# working directory to this directory. Then double-click to open the new -# DOS-prompt window with a bigger environment and retry the commands above. -# -# This makefile assumes libpng and zlib have already been built or downloaded -# and are in subdirectories at the same level as the current subdirectory -# (as indicated by the PNGPATH and ZPATH macros below). Edit as appropriate. -# -# Note that the names of the dynamic and static libpng and zlib libraries -# used below may change in later releases of the libraries. This makefile -# builds statically linked executables, but that can be changed by uncom- -# menting the appropriate PNGLIB and ZLIB lines. - -!include - - -# macros -------------------------------------------------------------------- - -PNGPATH = ../libpng -PNGINC = -I$(PNGPATH) -#PNGLIB = $(PNGPATH)/pngdll.lib -PNGLIB = $(PNGPATH)/libpng.lib - -ZPATH = ../zlib -ZINC = -I$(ZPATH) -#ZLIB = $(ZPATH)/zlibdll.lib -ZLIB = $(ZPATH)/zlibstat.lib - -WINLIBS = -defaultlib:user32.lib gdi32.lib -# ["real" apps may also need comctl32.lib, comdlg32.lib, winmm.lib, etc.] - -INCS = $(PNGINC) $(ZINC) -RLIBS = $(PNGLIB) $(ZLIB) $(WINLIBS) -WLIBS = $(PNGLIB) $(ZLIB) - -CC = cl -LD = link -RM = del -CPPFLAGS = $(INCS) -CFLAGS = -nologo -O -W3 $(cvars) -# [note that -W3 is an MSVC-specific compilation flag ("all warnings on")] -# [see %devstudio%\vc\include\win32.mak for cvars macro definition] -O = .obj -E = .exe - -RLDFLAGS = -nologo -subsystem:windows -WLDFLAGS = -nologo - -RPNG = rpng-win -RPNG2 = rpng2-win -WPNG = wpng - -ROBJS = $(RPNG)$(O) readpng$(O) -ROBJS2 = $(RPNG2)$(O) readpng2$(O) -WOBJS = $(WPNG)$(O) writepng$(O) - -EXES = $(RPNG)$(E) $(RPNG2)$(E) $(WPNG)$(E) - - -# implicit make rules ------------------------------------------------------- - -.c$(O): - $(CC) -c $(CPPFLAGS) $(CFLAGS) $< - - -# dependencies -------------------------------------------------------------- - -all: $(EXES) - -$(RPNG)$(E): $(ROBJS) - $(LD) $(RLDFLAGS) -out:$@ $(ROBJS) $(RLIBS) - -$(RPNG2)$(E): $(ROBJS2) - $(LD) $(RLDFLAGS) -out:$@ $(ROBJS2) $(RLIBS) - -$(WPNG)$(E): $(WOBJS) - $(LD) $(WLDFLAGS) -out:$@ $(WOBJS) $(WLIBS) - -$(RPNG)$(O): $(RPNG).c readpng.h -$(RPNG2)$(O): $(RPNG2).c readpng2.h -$(WPNG)$(O): $(WPNG).c writepng.h - -readpng$(O): readpng.c readpng.h -readpng2$(O): readpng2.c readpng2.h -writepng$(O): writepng.c writepng.h - - -# maintenance --------------------------------------------------------------- - -clean: -# ideally we could just do this: -# $(RM) $(EXES) $(ROBJS) $(ROBJS2) $(WOBJS) -# ...but the Windows "DEL" command is none too bright, so: - $(RM) r*$(E) - $(RM) w*$(E) - $(RM) r*$(O) - $(RM) w*$(O) diff --git a/lib/libpng-1.6.37/contrib/gregbook/README b/lib/libpng-1.6.37/contrib/gregbook/README deleted file mode 100644 index 90e28f7..0000000 --- a/lib/libpng-1.6.37/contrib/gregbook/README +++ /dev/null @@ -1,186 +0,0 @@ - =========================== - PNG: The Definitive Guide - =========================== - - Source Code - -Chapters 13, 14 and 15 of "PNG: The Definitive Guide" discuss three free, -cross-platform demo programs that show how to use the libpng reference -library: rpng, rpng2 and wpng. rpng and rpng2 are viewers; the first is -a very simple example that that shows how a standard file-viewer might use -libpng, while the second is designed to process streaming data and shows -how a web browser might be written. wpng is a simple command-line program -that reads binary PGM and PPM files (the ``raw'' grayscale and RGB subsets -of PBMPLUS/NetPBM) and converts them to PNG. - -The source code for all three demo programs currently compiles under -Unix, OpenVMS, and 32-bit Windows. (Special thanks to Martin Zinser, -zinser at decus.de, for making the necessary changes for OpenVMS and for -providing an appropriate build script.) Build instructions can be found -below. - -Files: - - README this file - LICENSE terms of distribution and reuse (BSD-like or GNU GPL) - COPYING GNU General Public License (GPL) - - Makefile.unx Unix makefile - Makefile.w32 Windows (MSVC) makefile - makevms.com OpenVMS build script - - rpng-win.c Windows front end for the basic viewer - rpng-x.c X Window System (Unix, OpenVMS) front end - readpng.c generic back end for the basic viewer - readpng.h header file for the basic viewer - - rpng2-win.c Windows front end for the progressive viewer - rpng2-x.c X front end for the progressive viewer - readpng2.c generic back end for the progressive viewer - readpng2.h header file for the progressive viewer - - wpng.c generic (text) front end for the converter - writepng.c generic back end for the converter - writepng.h header file for the converter - - toucan.png transparent PNG for testing (by Stefan Schneider) - -Note that, although the programs are designed to be functional, their -primary purpose is to illustrate how to use libpng to add PNG support to -other programs. As such, their user interfaces are crude and definitely -are not intended for everyday use. - -Please see http://www.libpng.org/pub/png/pngbook.html for further infor- -mation and links to the latest version of the source code, and Chapters -13-15 of the book for detailed discussion of the three programs. - -Greg Roelofs -https://pobox.com/~newt/greg_contact.html -16 March 2008 - - -BUILD INSTRUCTIONS - - - Prerequisites (in order of compilation): - - - zlib https://zlib.net/ - - libpng http://www.libpng.org/pub/png/libpng.html - - pngbook http://www.libpng.org/pub/png/book/sources.html - - The pngbook demo programs are explicitly designed to demonstrate proper - coding techniques for using the libpng reference library. As a result, - you need to download and build both zlib (on which libpng depends) and - libpng. A common build setup is to place the zlib, libpng and pngbook - subdirectory trees ("folders") in the same parent directory. Then the - libpng build can refer to files in ../zlib (or ..\zlib or [-.zlib]), - and similarly for the pngbook build. - - Note that all three packages are designed to be built from a command - line by default; those who wish to use a graphical or other integrated - development environments are on their own. - - - - Unix: - - Unpack the latest pngbook sources (which should correspond to this - README file) into a directory and change into that directory. - - Copy Makefile.unx to Makefile and edit the PNG* and Z* variables - appropriately (possibly also the X* variables if necessary). - - make - - There is no "install" target, so copy the three executables somewhere - in your path or run them from the current directory. All three will - print a basic usage screen when run without any command-line arguments; - see the book for more details. - - - - Windows: - - Unpack the latest pngbook sources (which should correspond to this - README file) into a folder, open a "DOS shell" or "command prompt" - or equivalent command-line window, and cd into the folder where you - unpacked the source code. - - For MSVC, set up the necessary environment variables by invoking - - %devstudio%\vc\bin\vcvars32.bat - - where where %devstudio% is the installation directory for MSVC / - DevStudio. If you get "environment out of space" errors under 95/98, - create a desktop shortcut with "c:\windows\command.com /e:4096" as - the program command line and set the working directory to the pngbook - directory. Then double-click to open the new DOS-prompt window with - a bigger environment and retry the commands above. - - Copy Makefile.w32 to Makefile and edit the PNGPATH and ZPATH variables - appropriately (possibly also the "INC" and "LIB" variables if needed). - Note that the names of the dynamic and static libpng and zlib libraries - used in the makefile may change in later releases of the libraries. - Also note that, as of libpng version 1.0.5, MSVC DLL builds do not work. - This makefile therefore builds statically linked executables, but if - the DLL problems ever get fixed, uncommenting the appropriate PNGLIB - and ZLIB lines will build dynamically linked executables instead. - - Do the build by typing - - nmake - - The result should be three executables: rpng-win.exe, rpng2-win.exe, - and wpng.exe. Copy them somewhere in your PATH or run them from the - current folder. Like the Unix versions, the two windowed programs - (rpng and rpng2) now display a usage screen in a console window when - invoked without command-line arguments; this is new behavior as of - the June 2001 release. Note that the programs use the Unix-style "-" - character to specify options, instead of the more common DOS/Windows - "/" character. (For example: "rpng2-win -bgpat 4 foo.png", not - "rpng2-win /bgpat 4 foo.png") - - - - OpenVMS: - - Unpack the pngbook sources into a subdirectory and change into that - subdirectory. - - Edit makevms.com appropriately, specifically the zpath and pngpath - variables. - - @makevms - - To run the programs, they probably first need to be set up as "foreign - symbols," with "disk" and "dir" set appropriately: - - $ rpng == "$disk:[dir]rpng-x.exe" - $ rpng2 == "$disk:[dir]rpng2-x.exe" - $ wpng == "$disk:[dir]wpng.exe" - - All three will print a basic usage screen when run without any command- - line arguments; see the book for more details. Note that the options - style is Unix-like, i.e., preceded by "-" rather than "/". - - -RUNNING THE PROGRAMS: (VERY) BRIEF INTRO - - rpng is a simple PNG viewer that can display transparent PNGs with a - specified background color; for example, - - rpng -bgcolor \#ff0000 toucan.png - - would display the image with a red background. rpng2 is a progressive - viewer that simulates a web browser in some respects; it can display - images against either a background color or a dynamically generated - background image. For example: - - rpng2 -bgpat 16 toucan.png - - wpng is a purely command-line image converter from binary PBMPLUS/NetPBM - format (.pgm or .ppm) to PNG; for example, - - wpng -time < toucan-notrans.ppm > toucan-notrans.png - - would convert the specified PPM file (using redirection) to PNG, auto- - matically setting the PNG modification-time chunk. - - All options can be abbreviated to the shortest unique value; for example, - "-bgc" for -bgcolor (versus "-bgp" for -bgpat), or "-g" for -gamma. diff --git a/lib/libpng-1.6.37/contrib/gregbook/makevms.com b/lib/libpng-1.6.37/contrib/gregbook/makevms.com deleted file mode 100644 index f32bcab..0000000 --- a/lib/libpng-1.6.37/contrib/gregbook/makevms.com +++ /dev/null @@ -1,132 +0,0 @@ -$!------------------------------------------------------------------------------ -$! make "PNG: The Definitive Guide" demo programs (for X) under OpenVMS -$! -$! Script created by Martin Zinser for libpng; modified by Greg Roelofs -$! for standalone pngbook source distribution. -$! -$! -$! Set locations where zlib and libpng sources live. -$! -$ zpath = "" -$ pngpath = "" -$! -$ if f$search("[---.zlib]zlib.h").nes."" then zpath = "[---.zlib]" -$ if f$search("[--]png.h").nes."" then pngpath = "[--]" -$! -$ if f$search("[-.zlib]zlib.h").nes."" then zpath = "[-.zlib]" -$ if f$search("[-.libpng]png.h").nes."" then pngpath = "[-.libpng]" -$! -$ if zpath .eqs. "" -$ then -$ write sys$output "zlib include not found. Exiting..." -$ exit 2 -$ endif -$! -$ if pngpath .eqs. "" -$ then -$ write sys$output "libpng include not found. Exiting..." -$ exit 2 -$ endif -$! -$! Look for the compiler used. -$! -$ ccopt="/include=(''zpath',''pngpath')" -$ if f$getsyi("HW_MODEL").ge.1024 -$ then -$ ccopt = "/prefix=all"+ccopt -$ comp = "__decc__=1" -$ if f$trnlnm("SYS").eqs."" then define sys sys$library: -$ else -$ if f$search("SYS$SYSTEM:DECC$COMPILER.EXE").eqs."" -$ then -$ if f$trnlnm("SYS").eqs."" then define sys sys$library: -$ if f$search("SYS$SYSTEM:VAXC.EXE").eqs."" -$ then -$ comp = "__gcc__=1" -$ CC :== GCC -$ else -$ comp = "__vaxc__=1" -$ endif -$ else -$ if f$trnlnm("SYS").eqs."" then define sys decc$library_include: -$ ccopt = "/decc/prefix=all"+ccopt -$ comp = "__decc__=1" -$ endif -$ endif -$ open/write lopt lib.opt -$ write lopt "''pngpath'libpng.olb/lib" -$ write lopt "''zpath'libz.olb/lib" -$ close lopt -$ open/write xopt x11.opt -$ write xopt "sys$library:decw$xlibshr.exe/share" -$ close xopt -$! -$! Build 'em. -$! -$ write sys$output "Compiling PNG book programs ..." -$ CALL MAKE readpng.OBJ "cc ''CCOPT' readpng" - - readpng.c readpng.h -$ CALL MAKE readpng2.OBJ "cc ''CCOPT' readpng2" - - readpng2.c readpng2.h -$ CALL MAKE writepng.OBJ "cc ''CCOPT' writepng" - - writepng.c writepng.h -$ write sys$output "Building rpng-x..." -$ CALL MAKE rpng-x.OBJ "cc ''CCOPT' rpng-x" - - rpng-x.c readpng.h -$ call make rpng-x.exe - - "LINK rpng-x,readpng,lib.opt/opt,x11.opt/opt" - - rpng-x.obj readpng.obj -$ write sys$output "Building rpng2-x..." -$ CALL MAKE rpng2-x.OBJ "cc ''CCOPT' rpng2-x" - - rpng2-x.c readpng2.h -$ call make rpng2-x.exe - - "LINK rpng2-x,readpng2,lib.opt/opt,x11.opt/opt" - - rpng2-x.obj readpng2.obj -$ write sys$output "Building wpng..." -$ CALL MAKE wpng.OBJ "cc ''CCOPT' wpng" - - wpng.c writepng.h -$ call make wpng.exe - - "LINK wpng,writepng,lib.opt/opt" - - wpng.obj writepng.obj -$ exit -$! -$! -$MAKE: SUBROUTINE !SUBROUTINE TO CHECK DEPENDENCIES -$ V = 'F$Verify(0) -$! P1 = What we are trying to make -$! P2 = Command to make it -$! P3 - P8 What it depends on -$ -$ If F$Search(P1) .Eqs. "" Then Goto Makeit -$ Time = F$CvTime(F$File(P1,"RDT")) -$arg=3 -$Loop: -$ Argument = P'arg -$ If Argument .Eqs. "" Then Goto Exit -$ El=0 -$Loop2: -$ File = F$Element(El," ",Argument) -$ If File .Eqs. " " Then Goto Endl -$ AFile = "" -$Loop3: -$ OFile = AFile -$ AFile = F$Search(File) -$ If AFile .Eqs. "" .Or. AFile .Eqs. OFile Then Goto NextEl -$ If F$CvTime(F$File(AFile,"RDT")) .Ges. Time Then Goto Makeit -$ Goto Loop3 -$NextEL: -$ El = El + 1 -$ Goto Loop2 -$EndL: -$ arg=arg+1 -$ If arg .Le. 8 Then Goto Loop -$ Goto Exit -$ -$Makeit: -$ VV=F$VERIFY(0) -$ write sys$output P2 -$ 'P2 -$ VV='F$Verify(VV) -$Exit: -$ If V Then Set Verify -$ENDSUBROUTINE diff --git a/lib/libpng-1.6.37/contrib/gregbook/readpng.c b/lib/libpng-1.6.37/contrib/gregbook/readpng.c deleted file mode 100644 index fad9b53..0000000 --- a/lib/libpng-1.6.37/contrib/gregbook/readpng.c +++ /dev/null @@ -1,323 +0,0 @@ -/*--------------------------------------------------------------------------- - - rpng - simple PNG display program readpng.c - - --------------------------------------------------------------------------- - - Copyright (c) 1998-2007,2017 Greg Roelofs. All rights reserved. - - This software is provided "as is," without warranty of any kind, - express or implied. In no event shall the author or contributors - be held liable for any damages arising in any way from the use of - this software. - - The contents of this file are DUAL-LICENSED. You may modify and/or - redistribute this software according to the terms of one of the - following two licenses (at your option): - - - LICENSE 1 ("BSD-like with advertising clause"): - - Permission is granted to anyone to use this software for any purpose, - including commercial applications, and to alter it and redistribute - it freely, subject to the following restrictions: - - 1. Redistributions of source code must retain the above copyright - notice, disclaimer, and this list of conditions. - 2. Redistributions in binary form must reproduce the above copyright - notice, disclaimer, and this list of conditions in the documenta- - tion and/or other materials provided with the distribution. - 3. All advertising materials mentioning features or use of this - software must display the following acknowledgment: - - This product includes software developed by Greg Roelofs - and contributors for the book, "PNG: The Definitive Guide," - published by O'Reilly and Associates. - - - LICENSE 2 (GNU GPL v2 or later): - - This program is free software; you can redistribute it and/or modify - it under the terms of the GNU General Public License as published by - the Free Software Foundation; either version 2 of the License, or - (at your option) any later version. - - This program is distributed in the hope that it will be useful, - but WITHOUT ANY WARRANTY; without even the implied warranty of - MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - GNU General Public License for more details. - - You should have received a copy of the GNU General Public License - along with this program; if not, write to the Free Software Foundation, - Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA - - ---------------------------------------------------------------------------*/ - -#include -#include -#include - -#include "png.h" /* libpng header */ -#include "readpng.h" /* typedefs, common macros, public prototypes */ - -/* future versions of libpng will provide this macro: */ -#ifndef png_jmpbuf -# define png_jmpbuf(png_ptr) ((png_ptr)->jmpbuf) -#endif - - -static png_structp png_ptr = NULL; -static png_infop info_ptr = NULL; - -png_uint_32 width, height; -int bit_depth, color_type; -uch *image_data = NULL; - - -void readpng_version_info(void) -{ - fprintf(stderr, " Compiled with libpng %s; using libpng %s.\n", - PNG_LIBPNG_VER_STRING, png_libpng_ver); - fprintf(stderr, " Compiled with zlib %s; using zlib %s.\n", - ZLIB_VERSION, zlib_version); -} - - -/* return value = 0 for success, 1 for bad sig, 2 for bad IHDR, 4 for no mem */ - -int readpng_init(FILE *infile, ulg *pWidth, ulg *pHeight) -{ - uch sig[8]; - - - /* first do a quick check that the file really is a PNG image; could - * have used slightly more general png_sig_cmp() function instead */ - - fread(sig, 1, 8, infile); - if (png_sig_cmp(sig, 0, 8)) - return 1; /* bad signature */ - - - /* could pass pointers to user-defined error handlers instead of NULLs: */ - - png_ptr = png_create_read_struct(png_get_libpng_ver(NULL), NULL, NULL, - NULL); - if (!png_ptr) - return 4; /* out of memory */ - - info_ptr = png_create_info_struct(png_ptr); - if (!info_ptr) { - png_destroy_read_struct(&png_ptr, NULL, NULL); - return 4; /* out of memory */ - } - - - /* we could create a second info struct here (end_info), but it's only - * useful if we want to keep pre- and post-IDAT chunk info separated - * (mainly for PNG-aware image editors and converters) */ - - - /* setjmp() must be called in every function that calls a PNG-reading - * libpng function */ - - if (setjmp(png_jmpbuf(png_ptr))) { - png_destroy_read_struct(&png_ptr, &info_ptr, NULL); - return 2; - } - - - png_init_io(png_ptr, infile); - png_set_sig_bytes(png_ptr, 8); /* we already read the 8 signature bytes */ - - png_read_info(png_ptr, info_ptr); /* read all PNG info up to image data */ - - - /* alternatively, could make separate calls to png_get_image_width(), - * etc., but want bit_depth and color_type for later [don't care about - * compression_type and filter_type => NULLs] */ - - png_get_IHDR(png_ptr, info_ptr, &width, &height, &bit_depth, &color_type, - NULL, NULL, NULL); - *pWidth = width; - *pHeight = height; - - - /* OK, that's all we need for now; return happy */ - - return 0; -} - - - - -/* returns 0 if succeeds, 1 if fails due to no bKGD chunk, 2 if libpng error; - * scales values to 8-bit if necessary */ - -int readpng_get_bgcolor(uch *red, uch *green, uch *blue) -{ - png_color_16p pBackground; - - - /* setjmp() must be called in every function that calls a PNG-reading - * libpng function */ - - if (setjmp(png_jmpbuf(png_ptr))) { - png_destroy_read_struct(&png_ptr, &info_ptr, NULL); - return 2; - } - - - if (!png_get_valid(png_ptr, info_ptr, PNG_INFO_bKGD)) - return 1; - - /* it is not obvious from the libpng documentation, but this function - * takes a pointer to a pointer, and it always returns valid red, green - * and blue values, regardless of color_type: */ - - png_get_bKGD(png_ptr, info_ptr, &pBackground); - - - /* however, it always returns the raw bKGD data, regardless of any - * bit-depth transformations, so check depth and adjust if necessary */ - - if (bit_depth == 16) { - *red = pBackground->red >> 8; - *green = pBackground->green >> 8; - *blue = pBackground->blue >> 8; - } else if (color_type == PNG_COLOR_TYPE_GRAY && bit_depth < 8) { - if (bit_depth == 1) - *red = *green = *blue = pBackground->gray? 255 : 0; - else if (bit_depth == 2) - *red = *green = *blue = (255/3) * pBackground->gray; - else /* bit_depth == 4 */ - *red = *green = *blue = (255/15) * pBackground->gray; - } else { - *red = (uch)pBackground->red; - *green = (uch)pBackground->green; - *blue = (uch)pBackground->blue; - } - - return 0; -} - - - - -/* display_exponent == LUT_exponent * CRT_exponent */ - -uch *readpng_get_image(double display_exponent, int *pChannels, ulg *pRowbytes) -{ - double gamma; - png_uint_32 i, rowbytes; - png_bytepp row_pointers = NULL; - - - /* setjmp() must be called in every function that calls a PNG-reading - * libpng function */ - - if (setjmp(png_jmpbuf(png_ptr))) { - free(image_data); - image_data = NULL; - free(row_pointers); - row_pointers = NULL; - png_destroy_read_struct(&png_ptr, &info_ptr, NULL); - return NULL; - } - - - /* expand palette images to RGB, low-bit-depth grayscale images to 8 bits, - * transparency chunks to full alpha channel; strip 16-bit-per-sample - * images to 8 bits per sample; and convert grayscale to RGB[A] */ - - if (color_type == PNG_COLOR_TYPE_PALETTE) - png_set_expand(png_ptr); - if (color_type == PNG_COLOR_TYPE_GRAY && bit_depth < 8) - png_set_expand(png_ptr); - if (png_get_valid(png_ptr, info_ptr, PNG_INFO_tRNS)) - png_set_expand(png_ptr); -#ifdef PNG_READ_16_TO_8_SUPPORTED - if (bit_depth == 16) -# ifdef PNG_READ_SCALE_16_TO_8_SUPPORTED - png_set_scale_16(png_ptr); -# else - png_set_strip_16(png_ptr); -# endif -#endif - if (color_type == PNG_COLOR_TYPE_GRAY || - color_type == PNG_COLOR_TYPE_GRAY_ALPHA) - png_set_gray_to_rgb(png_ptr); - - - /* unlike the example in the libpng documentation, we have *no* idea where - * this file may have come from--so if it doesn't have a file gamma, don't - * do any correction ("do no harm") */ - - if (png_get_gAMA(png_ptr, info_ptr, &gamma)) - png_set_gamma(png_ptr, display_exponent, gamma); - - - /* all transformations have been registered; now update info_ptr data, - * get rowbytes and channels, and allocate image memory */ - - png_read_update_info(png_ptr, info_ptr); - - *pRowbytes = rowbytes = png_get_rowbytes(png_ptr, info_ptr); - *pChannels = (int)png_get_channels(png_ptr, info_ptr); - - /* Guard against integer overflow */ - if (height > ((size_t)(-1))/rowbytes) { - fprintf(stderr, "readpng: image_data buffer would be too large\n", - return NULL; - } - - if ((image_data = (uch *)malloc(rowbytes*height)) == NULL) { - png_destroy_read_struct(&png_ptr, &info_ptr, NULL); - return NULL; - } - if ((row_pointers = (png_bytepp)malloc(height*sizeof(png_bytep))) == NULL) { - png_destroy_read_struct(&png_ptr, &info_ptr, NULL); - free(image_data); - image_data = NULL; - return NULL; - } - - Trace((stderr, "readpng_get_image: channels = %d, rowbytes = %ld, height = %ld\n", - *pChannels, rowbytes, height)); - - - /* set the individual row_pointers to point at the correct offsets */ - - for (i = 0; i < height; ++i) - row_pointers[i] = image_data + i*rowbytes; - - - /* now we can go ahead and just read the whole image */ - - png_read_image(png_ptr, row_pointers); - - - /* and we're done! (png_read_end() can be omitted if no processing of - * post-IDAT text/time/etc. is desired) */ - - free(row_pointers); - row_pointers = NULL; - - png_read_end(png_ptr, NULL); - - return image_data; -} - - -void readpng_cleanup(int free_image_data) -{ - if (free_image_data && image_data) { - free(image_data); - image_data = NULL; - } - - if (png_ptr && info_ptr) { - png_destroy_read_struct(&png_ptr, &info_ptr, NULL); - png_ptr = NULL; - info_ptr = NULL; - } -} diff --git a/lib/libpng-1.6.37/contrib/gregbook/readpng.h b/lib/libpng-1.6.37/contrib/gregbook/readpng.h deleted file mode 100644 index fad9fe3..0000000 --- a/lib/libpng-1.6.37/contrib/gregbook/readpng.h +++ /dev/null @@ -1,88 +0,0 @@ -/*--------------------------------------------------------------------------- - - rpng - simple PNG display program readpng.h - - --------------------------------------------------------------------------- - - Copyright (c) 1998-2007 Greg Roelofs. All rights reserved. - - This software is provided "as is," without warranty of any kind, - express or implied. In no event shall the author or contributors - be held liable for any damages arising in any way from the use of - this software. - - The contents of this file are DUAL-LICENSED. You may modify and/or - redistribute this software according to the terms of one of the - following two licenses (at your option): - - - LICENSE 1 ("BSD-like with advertising clause"): - - Permission is granted to anyone to use this software for any purpose, - including commercial applications, and to alter it and redistribute - it freely, subject to the following restrictions: - - 1. Redistributions of source code must retain the above copyright - notice, disclaimer, and this list of conditions. - 2. Redistributions in binary form must reproduce the above copyright - notice, disclaimer, and this list of conditions in the documenta- - tion and/or other materials provided with the distribution. - 3. All advertising materials mentioning features or use of this - software must display the following acknowledgment: - - This product includes software developed by Greg Roelofs - and contributors for the book, "PNG: The Definitive Guide," - published by O'Reilly and Associates. - - - LICENSE 2 (GNU GPL v2 or later): - - This program is free software; you can redistribute it and/or modify - it under the terms of the GNU General Public License as published by - the Free Software Foundation; either version 2 of the License, or - (at your option) any later version. - - This program is distributed in the hope that it will be useful, - but WITHOUT ANY WARRANTY; without even the implied warranty of - MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - GNU General Public License for more details. - - You should have received a copy of the GNU General Public License - along with this program; if not, write to the Free Software Foundation, - Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA - - ---------------------------------------------------------------------------*/ - -#ifndef TRUE -# define TRUE 1 -# define FALSE 0 -#endif - -#ifndef MAX -# define MAX(a,b) ((a) > (b)? (a) : (b)) -# define MIN(a,b) ((a) < (b)? (a) : (b)) -#endif - -#ifdef DEBUG -# define Trace(x) {fprintf x ; fflush(stderr); fflush(stdout);} -#else -# define Trace(x) ; -#endif - -typedef unsigned char uch; -typedef unsigned short ush; -typedef unsigned long ulg; - - -/* prototypes for public functions in readpng.c */ - -void readpng_version_info(void); - -int readpng_init(FILE *infile, ulg *pWidth, ulg *pHeight); - -int readpng_get_bgcolor(uch *bg_red, uch *bg_green, uch *bg_blue); - -uch *readpng_get_image(double display_exponent, int *pChannels, - ulg *pRowbytes); - -void readpng_cleanup(int free_image_data); diff --git a/lib/libpng-1.6.37/contrib/gregbook/readpng2.c b/lib/libpng-1.6.37/contrib/gregbook/readpng2.c deleted file mode 100644 index 610b3cd..0000000 --- a/lib/libpng-1.6.37/contrib/gregbook/readpng2.c +++ /dev/null @@ -1,521 +0,0 @@ -/*--------------------------------------------------------------------------- - - rpng2 - progressive-model PNG display program readpng2.c - - --------------------------------------------------------------------------- - - Copyright (c) 1998-2015 Greg Roelofs. All rights reserved. - - This software is provided "as is," without warranty of any kind, - express or implied. In no event shall the author or contributors - be held liable for any damages arising in any way from the use of - this software. - - The contents of this file are DUAL-LICENSED. You may modify and/or - redistribute this software according to the terms of one of the - following two licenses (at your option): - - - LICENSE 1 ("BSD-like with advertising clause"): - - Permission is granted to anyone to use this software for any purpose, - including commercial applications, and to alter it and redistribute - it freely, subject to the following restrictions: - - 1. Redistributions of source code must retain the above copyright - notice, disclaimer, and this list of conditions. - 2. Redistributions in binary form must reproduce the above copyright - notice, disclaimer, and this list of conditions in the documenta- - tion and/or other materials provided with the distribution. - 3. All advertising materials mentioning features or use of this - software must display the following acknowledgment: - - This product includes software developed by Greg Roelofs - and contributors for the book, "PNG: The Definitive Guide," - published by O'Reilly and Associates. - - - LICENSE 2 (GNU GPL v2 or later): - - This program is free software; you can redistribute it and/or modify - it under the terms of the GNU General Public License as published by - the Free Software Foundation; either version 2 of the License, or - (at your option) any later version. - - This program is distributed in the hope that it will be useful, - but WITHOUT ANY WARRANTY; without even the implied warranty of - MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - GNU General Public License for more details. - - You should have received a copy of the GNU General Public License - along with this program; if not, write to the Free Software Foundation, - Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA - - --------------------------------------------------------------------------- - - Changelog: - 2015-11-12 - Check return value of png_get_bKGD() (Glenn R-P) - 2017-04-22 - Guard against integer overflow (Glenn R-P) - - ---------------------------------------------------------------------------*/ - - -#include /* for exit() prototype */ -#include - -#include -#include "png.h" /* libpng header from the local directory */ -#include "readpng2.h" /* typedefs, common macros, public prototypes */ - - -/* local prototypes */ - -static void readpng2_info_callback(png_structp png_ptr, png_infop info_ptr); -static void readpng2_row_callback(png_structp png_ptr, png_bytep new_row, - png_uint_32 row_num, int pass); -static void readpng2_end_callback(png_structp png_ptr, png_infop info_ptr); -static void readpng2_error_handler(png_structp png_ptr, png_const_charp msg); -static void readpng2_warning_handler(png_structp png_ptr, png_const_charp msg); - - - - -void readpng2_version_info(void) -{ - fprintf(stderr, " Compiled with libpng %s; using libpng %s\n", - PNG_LIBPNG_VER_STRING, png_libpng_ver); - - fprintf(stderr, " and with zlib %s; using zlib %s.\n", - ZLIB_VERSION, zlib_version); -} - - - - -int readpng2_check_sig(uch *sig, int num) -{ - return !png_sig_cmp(sig, 0, num); -} - - - - -/* returns 0 for success, 2 for libpng problem, 4 for out of memory */ - -int readpng2_init(mainprog_info *mainprog_ptr) -{ - png_structp png_ptr; /* note: temporary variables! */ - png_infop info_ptr; - - - /* could also replace libpng warning-handler (final NULL), but no need: */ - - png_ptr = png_create_read_struct(png_get_libpng_ver(NULL), mainprog_ptr, - readpng2_error_handler, readpng2_warning_handler); - if (!png_ptr) - return 4; /* out of memory */ - - info_ptr = png_create_info_struct(png_ptr); - if (!info_ptr) { - png_destroy_read_struct(&png_ptr, NULL, NULL); - return 4; /* out of memory */ - } - - - /* we could create a second info struct here (end_info), but it's only - * useful if we want to keep pre- and post-IDAT chunk info separated - * (mainly for PNG-aware image editors and converters) */ - - - /* setjmp() must be called in every function that calls a PNG-reading - * libpng function, unless an alternate error handler was installed-- - * but compatible error handlers must either use longjmp() themselves - * (as in this program) or exit immediately, so here we are: */ - - if (setjmp(mainprog_ptr->jmpbuf)) { - png_destroy_read_struct(&png_ptr, &info_ptr, NULL); - return 2; - } - - -#ifdef PNG_HANDLE_AS_UNKNOWN_SUPPORTED - /* prepare the reader to ignore all recognized chunks whose data won't be - * used, i.e., all chunks recognized by libpng except for IHDR, PLTE, IDAT, - * IEND, tRNS, bKGD, gAMA, and sRGB (small performance improvement) */ - { - /* These byte strings were copied from png.h. If a future version - * of readpng2.c recognizes more chunks, add them to this list. - */ - static const png_byte chunks_to_process[] = { - 98, 75, 71, 68, '\0', /* bKGD */ - 103, 65, 77, 65, '\0', /* gAMA */ - 115, 82, 71, 66, '\0', /* sRGB */ - }; - - /* Ignore all chunks except for IHDR, PLTE, tRNS, IDAT, and IEND */ - png_set_keep_unknown_chunks(png_ptr, -1 /* PNG_HANDLE_CHUNK_NEVER */, - NULL, -1); - - /* But do not ignore chunks in the "chunks_to_process" list */ - png_set_keep_unknown_chunks(png_ptr, - 0 /* PNG_HANDLE_CHUNK_AS_DEFAULT */, chunks_to_process, - sizeof(chunks_to_process)/5); - } -#endif /* PNG_HANDLE_AS_UNKNOWN_SUPPORTED */ - - - /* instead of doing png_init_io() here, now we set up our callback - * functions for progressive decoding */ - - png_set_progressive_read_fn(png_ptr, mainprog_ptr, - readpng2_info_callback, readpng2_row_callback, readpng2_end_callback); - - - /* make sure we save our pointers for use in readpng2_decode_data() */ - - mainprog_ptr->png_ptr = png_ptr; - mainprog_ptr->info_ptr = info_ptr; - - - /* and that's all there is to initialization */ - - return 0; -} - - - - -/* returns 0 for success, 2 for libpng (longjmp) problem */ - -int readpng2_decode_data(mainprog_info *mainprog_ptr, uch *rawbuf, ulg length) -{ - png_structp png_ptr = (png_structp)mainprog_ptr->png_ptr; - png_infop info_ptr = (png_infop)mainprog_ptr->info_ptr; - - - /* setjmp() must be called in every function that calls a PNG-reading - * libpng function */ - - if (setjmp(mainprog_ptr->jmpbuf)) { - png_destroy_read_struct(&png_ptr, &info_ptr, NULL); - mainprog_ptr->png_ptr = NULL; - mainprog_ptr->info_ptr = NULL; - return 2; - } - - - /* hand off the next chunk of input data to libpng for decoding */ - - png_process_data(png_ptr, info_ptr, rawbuf, length); - - return 0; -} - - - - -static void readpng2_info_callback(png_structp png_ptr, png_infop info_ptr) -{ - mainprog_info *mainprog_ptr; - int color_type, bit_depth; - png_uint_32 width, height; -#ifdef PNG_FLOATING_POINT_SUPPORTED - double gamma; -#else - png_fixed_point gamma; -#endif - - - /* setjmp() doesn't make sense here, because we'd either have to exit(), - * longjmp() ourselves, or return control to libpng, which doesn't want - * to see us again. By not doing anything here, libpng will instead jump - * to readpng2_decode_data(), which can return an error value to the main - * program. */ - - - /* retrieve the pointer to our special-purpose struct, using the png_ptr - * that libpng passed back to us (i.e., not a global this time--there's - * no real difference for a single image, but for a multithreaded browser - * decoding several PNG images at the same time, one needs to avoid mixing - * up different images' structs) */ - - mainprog_ptr = png_get_progressive_ptr(png_ptr); - - if (mainprog_ptr == NULL) { /* we be hosed */ - fprintf(stderr, - "readpng2 error: main struct not recoverable in info_callback.\n"); - fflush(stderr); - return; - /* - * Alternatively, we could call our error-handler just like libpng - * does, which would effectively terminate the program. Since this - * can only happen if png_ptr gets redirected somewhere odd or the - * main PNG struct gets wiped, we're probably toast anyway. (If - * png_ptr itself is NULL, we would not have been called.) - */ - } - - - /* this is just like in the non-progressive case */ - - png_get_IHDR(png_ptr, info_ptr, &width, &height, &bit_depth, &color_type, - NULL, NULL, NULL); - mainprog_ptr->width = (ulg)width; - mainprog_ptr->height = (ulg)height; - - - /* since we know we've read all of the PNG file's "header" (i.e., up - * to IDAT), we can check for a background color here */ - - if (mainprog_ptr->need_bgcolor) - { - png_color_16p pBackground; - - /* it is not obvious from the libpng documentation, but this function - * takes a pointer to a pointer, and it always returns valid red, - * green and blue values, regardless of color_type: */ - if (png_get_bKGD(png_ptr, info_ptr, &pBackground)) - { - - /* however, it always returns the raw bKGD data, regardless of any - * bit-depth transformations, so check depth and adjust if necessary - */ - if (bit_depth == 16) { - mainprog_ptr->bg_red = pBackground->red >> 8; - mainprog_ptr->bg_green = pBackground->green >> 8; - mainprog_ptr->bg_blue = pBackground->blue >> 8; - } else if (color_type == PNG_COLOR_TYPE_GRAY && bit_depth < 8) { - if (bit_depth == 1) - mainprog_ptr->bg_red = mainprog_ptr->bg_green = - mainprog_ptr->bg_blue = pBackground->gray? 255 : 0; - else if (bit_depth == 2) - mainprog_ptr->bg_red = mainprog_ptr->bg_green = - mainprog_ptr->bg_blue = (255/3) * pBackground->gray; - else /* bit_depth == 4 */ - mainprog_ptr->bg_red = mainprog_ptr->bg_green = - mainprog_ptr->bg_blue = (255/15) * pBackground->gray; - } else { - mainprog_ptr->bg_red = (uch)pBackground->red; - mainprog_ptr->bg_green = (uch)pBackground->green; - mainprog_ptr->bg_blue = (uch)pBackground->blue; - } - } - } - - - /* as before, let libpng expand palette images to RGB, low-bit-depth - * grayscale images to 8 bits, transparency chunks to full alpha channel; - * strip 16-bit-per-sample images to 8 bits per sample; and convert - * grayscale to RGB[A] */ - - if (color_type == PNG_COLOR_TYPE_PALETTE) - png_set_expand(png_ptr); - if (color_type == PNG_COLOR_TYPE_GRAY && bit_depth < 8) - png_set_expand(png_ptr); - if (png_get_valid(png_ptr, info_ptr, PNG_INFO_tRNS)) - png_set_expand(png_ptr); -#ifdef PNG_READ_16_TO_8_SUPPORTED - if (bit_depth == 16) -# ifdef PNG_READ_SCALE_16_TO_8_SUPPORTED - png_set_scale_16(png_ptr); -# else - png_set_strip_16(png_ptr); -# endif -#endif - if (color_type == PNG_COLOR_TYPE_GRAY || - color_type == PNG_COLOR_TYPE_GRAY_ALPHA) - png_set_gray_to_rgb(png_ptr); - - - /* Unlike the basic viewer, which was designed to operate on local files, - * this program is intended to simulate a web browser--even though we - * actually read from a local file, too. But because we are pretending - * that most of the images originate on the Internet, we follow the recom- - * mendation of the sRGB proposal and treat unlabelled images (no gAMA - * chunk) as existing in the sRGB color space. That is, we assume that - * such images have a file gamma of 0.45455, which corresponds to a PC-like - * display system. This change in assumptions will have no effect on a - * PC-like system, but on a Mac, SGI, NeXT or other system with a non- - * identity lookup table, it will darken unlabelled images, which effec- - * tively favors images from PC-like systems over those originating on - * the local platform. Note that mainprog_ptr->display_exponent is the - * "gamma" value for the entire display system, i.e., the product of - * LUT_exponent and CRT_exponent. */ - -#ifdef PNG_FLOATING_POINT_SUPPORTED - if (png_get_gAMA(png_ptr, info_ptr, &gamma)) - png_set_gamma(png_ptr, mainprog_ptr->display_exponent, gamma); - else - png_set_gamma(png_ptr, mainprog_ptr->display_exponent, 0.45455); -#else - if (png_get_gAMA_fixed(png_ptr, info_ptr, &gamma)) - png_set_gamma_fixed(png_ptr, - (png_fixed_point)(100000*mainprog_ptr->display_exponent+.5), gamma); - else - png_set_gamma_fixed(png_ptr, - (png_fixed_point)(100000*mainprog_ptr->display_exponent+.5), 45455); -#endif - - /* we'll let libpng expand interlaced images, too */ - - mainprog_ptr->passes = png_set_interlace_handling(png_ptr); - - - /* all transformations have been registered; now update info_ptr data and - * then get rowbytes and channels */ - - png_read_update_info(png_ptr, info_ptr); - - mainprog_ptr->rowbytes = (int)png_get_rowbytes(png_ptr, info_ptr); - mainprog_ptr->channels = png_get_channels(png_ptr, info_ptr); - - - /* Call the main program to allocate memory for the image buffer and - * initialize windows and whatnot. (The old-style function-pointer - * invocation is used for compatibility with a few supposedly ANSI - * compilers that nevertheless barf on "fn_ptr()"-style syntax.) */ - - (*mainprog_ptr->mainprog_init)(); - - - /* and that takes care of initialization */ - - return; -} - - - - - -static void readpng2_row_callback(png_structp png_ptr, png_bytep new_row, - png_uint_32 row_num, int pass) -{ - mainprog_info *mainprog_ptr; - - - /* first check whether the row differs from the previous pass; if not, - * nothing to combine or display */ - - if (!new_row) - return; - - - /* retrieve the pointer to our special-purpose struct so we can access - * the old rows and image-display callback function */ - - mainprog_ptr = png_get_progressive_ptr(png_ptr); - - - /* save the pass number for optional use by the front end */ - - mainprog_ptr->pass = pass; - - - /* have libpng either combine the new row data with the existing row data - * from previous passes (if interlaced) or else just copy the new row - * into the main program's image buffer */ - - png_progressive_combine_row(png_ptr, mainprog_ptr->row_pointers[row_num], - new_row); - - - /* finally, call the display routine in the main program with the number - * of the row we just updated */ - - (*mainprog_ptr->mainprog_display_row)(row_num); - - - /* and we're ready for more */ - - return; -} - - - - - -static void readpng2_end_callback(png_structp png_ptr, png_infop info_ptr) -{ - mainprog_info *mainprog_ptr; - - - /* retrieve the pointer to our special-purpose struct */ - - mainprog_ptr = png_get_progressive_ptr(png_ptr); - - - /* let the main program know that it should flush any buffered image - * data to the display now and set a "done" flag or whatever, but note - * that it SHOULD NOT DESTROY THE PNG STRUCTS YET--in other words, do - * NOT call readpng2_cleanup() either here or in the finish_display() - * routine; wait until control returns to the main program via - * readpng2_decode_data() */ - - (*mainprog_ptr->mainprog_finish_display)(); - - - /* all done */ - - (void)info_ptr; /* Unused */ - - return; -} - - - - - -void readpng2_cleanup(mainprog_info *mainprog_ptr) -{ - png_structp png_ptr = (png_structp)mainprog_ptr->png_ptr; - png_infop info_ptr = (png_infop)mainprog_ptr->info_ptr; - - if (png_ptr && info_ptr) - png_destroy_read_struct(&png_ptr, &info_ptr, NULL); - - mainprog_ptr->png_ptr = NULL; - mainprog_ptr->info_ptr = NULL; -} - - -static void readpng2_warning_handler(png_structp png_ptr, png_const_charp msg) -{ - fprintf(stderr, "readpng2 libpng warning: %s\n", msg); - fflush(stderr); - (void)png_ptr; /* Unused */ -} - - -static void readpng2_error_handler(png_structp png_ptr, png_const_charp msg) -{ - mainprog_info *mainprog_ptr; - - /* This function, aside from the extra step of retrieving the "error - * pointer" (below) and the fact that it exists within the application - * rather than within libpng, is essentially identical to libpng's - * default error handler. The second point is critical: since both - * setjmp() and longjmp() are called from the same code, they are - * guaranteed to have compatible notions of how big a jmp_buf is, - * regardless of whether _BSD_SOURCE or anything else has (or has not) - * been defined. */ - - fprintf(stderr, "readpng2 libpng error: %s\n", msg); - fflush(stderr); - - mainprog_ptr = png_get_error_ptr(png_ptr); - if (mainprog_ptr == NULL) { /* we are completely hosed now */ - fprintf(stderr, - "readpng2 severe error: jmpbuf not recoverable; terminating.\n"); - fflush(stderr); - exit(99); - } - - /* Now we have our data structure we can use the information in it - * to return control to our own higher level code (all the points - * where 'setjmp' is called in this file.) This will work with other - * error handling mechanisms as well - libpng always calls png_error - * when it can proceed no further, thus, so long as the error handler - * is intercepted, application code can do its own error recovery. - */ - longjmp(mainprog_ptr->jmpbuf, 1); -} diff --git a/lib/libpng-1.6.37/contrib/gregbook/readpng2.h b/lib/libpng-1.6.37/contrib/gregbook/readpng2.h deleted file mode 100644 index 6b3660d..0000000 --- a/lib/libpng-1.6.37/contrib/gregbook/readpng2.h +++ /dev/null @@ -1,116 +0,0 @@ -/*--------------------------------------------------------------------------- - - rpng2 - progressive-model PNG display program readpng2.h - - --------------------------------------------------------------------------- - - Copyright (c) 1998-2008 Greg Roelofs. All rights reserved. - - This software is provided "as is," without warranty of any kind, - express or implied. In no event shall the author or contributors - be held liable for any damages arising in any way from the use of - this software. - - The contents of this file are DUAL-LICENSED. You may modify and/or - redistribute this software according to the terms of one of the - following two licenses (at your option): - - - LICENSE 1 ("BSD-like with advertising clause"): - - Permission is granted to anyone to use this software for any purpose, - including commercial applications, and to alter it and redistribute - it freely, subject to the following restrictions: - - 1. Redistributions of source code must retain the above copyright - notice, disclaimer, and this list of conditions. - 2. Redistributions in binary form must reproduce the above copyright - notice, disclaimer, and this list of conditions in the documenta- - tion and/or other materials provided with the distribution. - 3. All advertising materials mentioning features or use of this - software must display the following acknowledgment: - - This product includes software developed by Greg Roelofs - and contributors for the book, "PNG: The Definitive Guide," - published by O'Reilly and Associates. - - - LICENSE 2 (GNU GPL v2 or later): - - This program is free software; you can redistribute it and/or modify - it under the terms of the GNU General Public License as published by - the Free Software Foundation; either version 2 of the License, or - (at your option) any later version. - - This program is distributed in the hope that it will be useful, - but WITHOUT ANY WARRANTY; without even the implied warranty of - MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - GNU General Public License for more details. - - You should have received a copy of the GNU General Public License - along with this program; if not, write to the Free Software Foundation, - Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA - - ---------------------------------------------------------------------------*/ - -#ifndef TRUE -# define TRUE 1 -# define FALSE 0 -#endif - -#ifndef MAX -# define MAX(a,b) ((a) > (b)? (a) : (b)) -# define MIN(a,b) ((a) < (b)? (a) : (b)) -#endif - -#ifdef DEBUG -# define Trace(x) {fprintf x ; fflush(stderr); fflush(stdout);} -#else -# define Trace(x) ; -#endif - -enum rpng2_states { - kPreInit = 0, - kWindowInit, - kDone -}; - -typedef unsigned char uch; -typedef unsigned short ush; -typedef unsigned long ulg; - -typedef struct _mainprog_info { - double display_exponent; - ulg width; - ulg height; - void *png_ptr; - void *info_ptr; - void (*mainprog_init)(void); - void (*mainprog_display_row)(ulg row_num); - void (*mainprog_finish_display)(void); - uch *image_data; - uch **row_pointers; - jmp_buf jmpbuf; - int passes; /* not used */ - int pass; - int rowbytes; - int channels; - int need_bgcolor; - int state; - uch bg_red; - uch bg_green; - uch bg_blue; -} mainprog_info; - - -/* prototypes for public functions in readpng2.c */ - -void readpng2_version_info(void); - -int readpng2_check_sig(uch *sig, int num); - -int readpng2_init(mainprog_info *mainprog_ptr); - -int readpng2_decode_data(mainprog_info *mainprog_ptr, uch *rawbuf, ulg length); - -void readpng2_cleanup(mainprog_info *mainprog_ptr); diff --git a/lib/libpng-1.6.37/contrib/gregbook/readppm.c b/lib/libpng-1.6.37/contrib/gregbook/readppm.c deleted file mode 100644 index 52e7027..0000000 --- a/lib/libpng-1.6.37/contrib/gregbook/readppm.c +++ /dev/null @@ -1,188 +0,0 @@ -/*--------------------------------------------------------------------------- - - rpng - simple PNG display program readppm.c - - --------------------------------------------------------------------------- - - This is a special-purpose replacement for readpng.c that allows binary - PPM files to be used in place of PNG images. - - --------------------------------------------------------------------------- - - Copyright (c) 1998-2007,2017 Greg Roelofs. All rights reserved. - - This software is provided "as is," without warranty of any kind, - express or implied. In no event shall the author or contributors - be held liable for any damages arising in any way from the use of - this software. - - The contents of this file are DUAL-LICENSED. You may modify and/or - redistribute this software according to the terms of one of the - following two licenses (at your option): - - - LICENSE 1 ("BSD-like with advertising clause"): - - Permission is granted to anyone to use this software for any purpose, - including commercial applications, and to alter it and redistribute - it freely, subject to the following restrictions: - - 1. Redistributions of source code must retain the above copyright - notice, disclaimer, and this list of conditions. - 2. Redistributions in binary form must reproduce the above copyright - notice, disclaimer, and this list of conditions in the documenta- - tion and/or other materials provided with the distribution. - 3. All advertising materials mentioning features or use of this - software must display the following acknowledgment: - - This product includes software developed by Greg Roelofs - and contributors for the book, "PNG: The Definitive Guide," - published by O'Reilly and Associates. - - - LICENSE 2 (GNU GPL v2 or later): - - This program is free software; you can redistribute it and/or modify - it under the terms of the GNU General Public License as published by - the Free Software Foundation; either version 2 of the License, or - (at your option) any later version. - - This program is distributed in the hope that it will be useful, - but WITHOUT ANY WARRANTY; without even the implied warranty of - MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - GNU General Public License for more details. - - You should have received a copy of the GNU General Public License - along with this program; if not, write to the Free Software Foundation, - Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA - - ---------------------------------------------------------------------------*/ - -#include -#include - -#include "readpng.h" /* typedefs, common macros, public prototypes */ - - -ulg width, height; -int bit_depth, color_type, channels; -uch *image_data = NULL; -FILE *saved_infile; - - -void readpng_version_info() -{ - fprintf(stderr, " Compiled without libpng, zlib or PBMPLUS/NetPBM.\n"); -} - - -/* return value = 0 for success, 1 for bad sig, 2 for bad IHDR, 4 for no mem */ - -int readpng_init(FILE *infile, ulg *pWidth, ulg *pHeight) -{ - static uch ppmline[256]; - int maxval; - - - saved_infile = infile; - - fgets(ppmline, 256, infile); - if (ppmline[0] != 'P' || ppmline[1] != '6') { - fprintf(stderr, "ERROR: not a PPM file\n"); - return 1; - } - /* possible color types: P5 = grayscale (0), P6 = RGB (2), P8 = RGBA (6) */ - if (ppmline[1] == '6') { - color_type = 2; - channels = 3; - } else if (ppmline[1] == '8') { - color_type = 6; - channels = 4; - } else /* if (ppmline[1] == '5') */ { - color_type = 0; - channels = 1; - } - - do { - fgets(ppmline, 256, infile); - } while (ppmline[0] == '#'); - sscanf(ppmline, "%lu %lu", &width, &height); - - do { - fgets(ppmline, 256, infile); - } while (ppmline[0] == '#'); - sscanf(ppmline, "%d", &maxval); - if (maxval != 255) { - fprintf(stderr, "ERROR: maxval = %d\n", maxval); - return 2; - } - bit_depth = 8; - - *pWidth = width; - *pHeight = height; - - return 0; -} - - - - -/* returns 0 if succeeds, 1 if fails due to no bKGD chunk, 2 if libpng error; - * scales values to 8-bit if necessary */ - -int readpng_get_bgcolor(uch *red, uch *green, uch *blue) -{ - return 1; -} - - - - -/* display_exponent == LUT_exponent * CRT_exponent */ - -uch *readpng_get_image(double display_exponent, int *pChannels, ulg *pRowbytes) -{ - ulg rowbytes; - - - /* expand palette images to RGB, low-bit-depth grayscale images to 8 bits, - * transparency chunks to full alpha channel; strip 16-bit-per-sample - * images to 8 bits per sample; and convert grayscale to RGB[A] */ - - /* GRR WARNING: grayscale needs to be expanded and channels reset! */ - - *pRowbytes = rowbytes = channels*width; - *pChannels = channels; - - Trace((stderr, "readpng_get_image: rowbytes = %ld, height = %ld\n", rowbytes, height)); - - /* Guard against integer overflow */ - if (height > ((size_t)(-1))/rowbytes) { - fprintf(stderr, PROGNAME ": image_data buffer would be too large\n", - return NULL; - } - - if ((image_data = (uch *)malloc(rowbytes*height)) == NULL) { - return NULL; - } - - /* now we can go ahead and just read the whole image */ - - if (fread(image_data, 1L, rowbytes*height, saved_infile) < - rowbytes*height) { - free (image_data); - image_data = NULL; - return NULL; - } - - return image_data; -} - - -void readpng_cleanup(int free_image_data) -{ - if (free_image_data && image_data) { - free(image_data); - image_data = NULL; - } -} diff --git a/lib/libpng-1.6.37/contrib/gregbook/rpng-win.c b/lib/libpng-1.6.37/contrib/gregbook/rpng-win.c deleted file mode 100644 index 1a6f876..0000000 --- a/lib/libpng-1.6.37/contrib/gregbook/rpng-win.c +++ /dev/null @@ -1,735 +0,0 @@ -/*--------------------------------------------------------------------------- - - rpng - simple PNG display program rpng-win.c - - This program decodes and displays PNG images, with gamma correction and - optionally with a user-specified background color (in case the image has - transparency). It is very nearly the most basic PNG viewer possible. - This version is for 32-bit Windows; it may compile under 16-bit Windows - with a little tweaking (or maybe not). - - to do: - - handle quoted command-line args (especially filenames with spaces) - - have minimum window width: oh well - - use %.1023s to simplify truncation of title-bar string? - - --------------------------------------------------------------------------- - - Changelog: - - 1.00: initial public release - - 1.01: modified to allow abbreviated options; fixed long/ulong mis- - match; switched to png_jmpbuf() macro - - 1.02: added extra set of parentheses to png_jmpbuf() macro; fixed - command-line parsing bug - - 1.10: enabled "message window"/console (thanks to David Geldreich) - - 2.00: dual-licensed (added GNU GPL) - - 2.01: fixed improper display of usage screen on PNG error(s) - - 2.02: check for integer overflow (Glenn R-P) - - --------------------------------------------------------------------------- - - Copyright (c) 1998-2008, 2017 Greg Roelofs. All rights reserved. - - This software is provided "as is," without warranty of any kind, - express or implied. In no event shall the author or contributors - be held liable for any damages arising in any way from the use of - this software. - - The contents of this file are DUAL-LICENSED. You may modify and/or - redistribute this software according to the terms of one of the - following two licenses (at your option): - - - LICENSE 1 ("BSD-like with advertising clause"): - - Permission is granted to anyone to use this software for any purpose, - including commercial applications, and to alter it and redistribute - it freely, subject to the following restrictions: - - 1. Redistributions of source code must retain the above copyright - notice, disclaimer, and this list of conditions. - 2. Redistributions in binary form must reproduce the above copyright - notice, disclaimer, and this list of conditions in the documenta- - tion and/or other materials provided with the distribution. - 3. All advertising materials mentioning features or use of this - software must display the following acknowledgment: - - This product includes software developed by Greg Roelofs - and contributors for the book, "PNG: The Definitive Guide," - published by O'Reilly and Associates. - - - LICENSE 2 (GNU GPL v2 or later): - - This program is free software; you can redistribute it and/or modify - it under the terms of the GNU General Public License as published by - the Free Software Foundation; either version 2 of the License, or - (at your option) any later version. - - This program is distributed in the hope that it will be useful, - but WITHOUT ANY WARRANTY; without even the implied warranty of - MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - GNU General Public License for more details. - - You should have received a copy of the GNU General Public License - along with this program; if not, write to the Free Software Foundation, - Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA - - ---------------------------------------------------------------------------*/ - -#define PROGNAME "rpng-win" -#define LONGNAME "Simple PNG Viewer for Windows" -#define VERSION "2.01 of 16 March 2008" - -#include -#include -#include -#include -#include -#ifdef __CYGWIN__ -/* getch replacement. Turns out, we don't really need this, - * but leave it here if we ever enable any of the uses of - * _getch in the main code - */ -#include -#include -#include -int repl_getch( void ) -{ - char ch; - int fd = fileno(stdin); - struct termio old_tty, new_tty; - - ioctl(fd, TCGETA, &old_tty); - new_tty = old_tty; - new_tty.c_lflag &= ~(ICANON | ECHO | ISIG); - ioctl(fd, TCSETA, &new_tty); - fread(&ch, 1, sizeof(ch), stdin); - ioctl(fd, TCSETA, &old_tty); - - return ch; -} -#define _getch repl_getch -#else -#include /* only for _getch() */ -#endif - -/* #define DEBUG : this enables the Trace() macros */ - -#include "readpng.h" /* typedefs, common macros, readpng prototypes */ - - -/* could just include png.h, but this macro is the only thing we need - * (name and typedefs changed to local versions); note that side effects - * only happen with alpha (which could easily be avoided with - * "ush acopy = (alpha);") */ - -#define alpha_composite(composite, fg, alpha, bg) { \ - ush temp = ((ush)(fg)*(ush)(alpha) + \ - (ush)(bg)*(ush)(255 - (ush)(alpha)) + (ush)128); \ - (composite) = (uch)((temp + (temp >> 8)) >> 8); \ -} - - -/* local prototypes */ -static int rpng_win_create_window(HINSTANCE hInst, int showmode); -static int rpng_win_display_image(void); -static void rpng_win_cleanup(void); -LRESULT CALLBACK rpng_win_wndproc(HWND, UINT, WPARAM, LPARAM); - - -static char titlebar[1024]; -static char *progname = PROGNAME; -static char *appname = LONGNAME; -static char *filename; -static FILE *infile; - -static char *bgstr; -static uch bg_red=0, bg_green=0, bg_blue=0; - -static double display_exponent; - -static ulg image_width, image_height, image_rowbytes; -static int image_channels; -static uch *image_data; - -/* Windows-specific variables */ -static ulg wimage_rowbytes; -static uch *dib; -static uch *wimage_data; -static BITMAPINFOHEADER *bmih; - -static HWND global_hwnd; - - - - -int WINAPI WinMain(HINSTANCE hInst, HINSTANCE hPrevInst, PSTR cmd, int showmode) -{ - char *args[1024]; /* arbitrary limit, but should suffice */ - char *p, *q, **argv = args; - int argc = 0; - int rc, alen, flen; - int error = 0; - int have_bg = FALSE; - double LUT_exponent; /* just the lookup table */ - double CRT_exponent = 2.2; /* just the monitor */ - double default_display_exponent; /* whole display system */ - MSG msg; - - - filename = (char *)NULL; - -#ifndef __CYGWIN__ - /* First reenable console output, which normally goes to the bit bucket - * for windowed apps. Closing the console window will terminate the - * app. Thanks to David.Geldreich at realviz.com for supplying the magical - * incantation. */ - - AllocConsole(); - freopen("CONOUT$", "a", stderr); - freopen("CONOUT$", "a", stdout); -#endif - - - /* Next set the default value for our display-system exponent, i.e., - * the product of the CRT exponent and the exponent corresponding to - * the frame-buffer's lookup table (LUT), if any. This is not an - * exhaustive list of LUT values (e.g., OpenStep has a lot of weird - * ones), but it should cover 99% of the current possibilities. And - * yes, these ifdefs are completely wasted in a Windows program... */ - -#if defined(NeXT) - LUT_exponent = 1.0 / 2.2; - /* - if (some_next_function_that_returns_gamma(&next_gamma)) - LUT_exponent = 1.0 / next_gamma; - */ -#elif defined(sgi) - LUT_exponent = 1.0 / 1.7; - /* there doesn't seem to be any documented function to get the - * "gamma" value, so we do it the hard way */ - infile = fopen("/etc/config/system.glGammaVal", "r"); - if (infile) { - double sgi_gamma; - - fgets(tmpline, 80, infile); - fclose(infile); - sgi_gamma = atof(tmpline); - if (sgi_gamma > 0.0) - LUT_exponent = 1.0 / sgi_gamma; - } -#elif defined(Macintosh) - LUT_exponent = 1.8 / 2.61; - /* - if (some_mac_function_that_returns_gamma(&mac_gamma)) - LUT_exponent = mac_gamma / 2.61; - */ -#else - LUT_exponent = 1.0; /* assume no LUT: most PCs */ -#endif - - /* the defaults above give 1.0, 1.3, 1.5 and 2.2, respectively: */ - default_display_exponent = LUT_exponent * CRT_exponent; - - - /* If the user has set the SCREEN_GAMMA environment variable as suggested - * (somewhat imprecisely) in the libpng documentation, use that; otherwise - * use the default value we just calculated. Either way, the user may - * override this via a command-line option. */ - - if ((p = getenv("SCREEN_GAMMA")) != NULL) - display_exponent = atof(p); - else - display_exponent = default_display_exponent; - - - /* Windows really hates command lines, so we have to set up our own argv. - * Note that we do NOT bother with quoted arguments here, so don't use - * filenames with spaces in 'em! */ - - argv[argc++] = PROGNAME; - p = cmd; - for (;;) { - if (*p == ' ') - while (*++p == ' ') - ; - /* now p points at the first non-space after some spaces */ - if (*p == '\0') - break; /* nothing after the spaces: done */ - argv[argc++] = q = p; - while (*q && *q != ' ') - ++q; - /* now q points at a space or the end of the string */ - if (*q == '\0') - break; /* last argv already terminated; quit */ - *q = '\0'; /* change space to terminator */ - p = q + 1; - } - argv[argc] = NULL; /* terminate the argv array itself */ - - - /* Now parse the command line for options and the PNG filename. */ - - while (*++argv && !error) { - if (!strncmp(*argv, "-gamma", 2)) { - if (!*++argv) - ++error; - else { - display_exponent = atof(*argv); - if (display_exponent <= 0.0) - ++error; - } - } else if (!strncmp(*argv, "-bgcolor", 2)) { - if (!*++argv) - ++error; - else { - bgstr = *argv; - if (strlen(bgstr) != 7 || bgstr[0] != '#') - ++error; - else - have_bg = TRUE; - } - } else { - if (**argv != '-') { - filename = *argv; - if (argv[1]) /* shouldn't be any more args after filename */ - ++error; - } else - ++error; /* not expecting any other options */ - } - } - - if (!filename) - ++error; - - - /* print usage screen if any errors up to this point */ - - if (error) { -#ifndef __CYGWIN__ - int ch; -#endif - - fprintf(stderr, "\n%s %s: %s\n\n", PROGNAME, VERSION, appname); - readpng_version_info(); - fprintf(stderr, "\n" - "Usage: %s [-gamma exp] [-bgcolor bg] file.png\n" - " exp \ttransfer-function exponent (``gamma'') of the display\n" - "\t\t system in floating-point format (e.g., ``%.1f''); equal\n" - "\t\t to the product of the lookup-table exponent (varies)\n" - "\t\t and the CRT exponent (usually 2.2); must be positive\n" - " bg \tdesired background color in 7-character hex RGB format\n" - "\t\t (e.g., ``#ff7700'' for orange: same as HTML colors);\n" - "\t\t used with transparent images\n" - "\nPress Q, Esc or mouse button 1 after image is displayed to quit.\n" -#ifndef __CYGWIN__ - "Press Q or Esc to quit this usage screen.\n" -#endif - "\n", PROGNAME, default_display_exponent); -#ifndef __CYGWIN__ - do - ch = _getch(); - while (ch != 'q' && ch != 'Q' && ch != 0x1B); -#endif - exit(1); - } - - - if (!(infile = fopen(filename, "rb"))) { - fprintf(stderr, PROGNAME ": can't open PNG file [%s]\n", filename); - ++error; - } else { - if ((rc = readpng_init(infile, &image_width, &image_height)) != 0) { - switch (rc) { - case 1: - fprintf(stderr, PROGNAME - ": [%s] is not a PNG file: incorrect signature\n", - filename); - break; - case 2: - fprintf(stderr, PROGNAME - ": [%s] has bad IHDR (libpng longjmp)\n", filename); - break; - case 4: - fprintf(stderr, PROGNAME ": insufficient memory\n"); - break; - default: - fprintf(stderr, PROGNAME - ": unknown readpng_init() error\n"); - break; - } - ++error; - } - if (error) - fclose(infile); - } - - - if (error) { -#ifndef __CYGWIN__ - int ch; -#endif - - fprintf(stderr, PROGNAME ": aborting.\n"); -#ifndef __CYGWIN__ - do - ch = _getch(); - while (ch != 'q' && ch != 'Q' && ch != 0x1B); -#endif - exit(2); - } else { - fprintf(stderr, "\n%s %s: %s\n", PROGNAME, VERSION, appname); -#ifndef __CYGWIN__ - fprintf(stderr, - "\n [console window: closing this window will terminate %s]\n\n", - PROGNAME); -#endif - } - - - /* set the title-bar string, but make sure buffer doesn't overflow */ - - alen = strlen(appname); - flen = strlen(filename); - if (alen + flen + 3 > 1023) - sprintf(titlebar, "%s: ...%s", appname, filename+(alen+flen+6-1023)); - else - sprintf(titlebar, "%s: %s", appname, filename); - - - /* if the user didn't specify a background color on the command line, - * check for one in the PNG file--if not, the initialized values of 0 - * (black) will be used */ - - if (have_bg) { - unsigned r, g, b; /* this approach quiets compiler warnings */ - - sscanf(bgstr+1, "%2x%2x%2x", &r, &g, &b); - bg_red = (uch)r; - bg_green = (uch)g; - bg_blue = (uch)b; - } else if (readpng_get_bgcolor(&bg_red, &bg_green, &bg_blue) > 1) { - readpng_cleanup(TRUE); - fprintf(stderr, PROGNAME - ": libpng error while checking for background color\n"); - exit(2); - } - - - /* do the basic Windows initialization stuff, make the window and fill it - * with the background color */ - - if (rpng_win_create_window(hInst, showmode)) - exit(2); - - - /* decode the image, all at once */ - - Trace((stderr, "calling readpng_get_image()\n")) - image_data = readpng_get_image(display_exponent, &image_channels, - &image_rowbytes); - Trace((stderr, "done with readpng_get_image()\n")) - - - /* done with PNG file, so clean up to minimize memory usage (but do NOT - * nuke image_data!) */ - - readpng_cleanup(FALSE); - fclose(infile); - - if (!image_data) { - fprintf(stderr, PROGNAME ": unable to decode PNG image\n"); - exit(3); - } - - - /* display image (composite with background if requested) */ - - Trace((stderr, "calling rpng_win_display_image()\n")) - if (rpng_win_display_image()) { - free(image_data); - exit(4); - } - Trace((stderr, "done with rpng_win_display_image()\n")) - - - /* wait for the user to tell us when to quit */ - - printf( -#ifndef __CYGWIN__ - "Done. Press Q, Esc or mouse button 1 (within image window) to quit.\n" -#else - "Done. Press mouse button 1 (within image window) to quit.\n" -#endif - ); - fflush(stdout); - - while (GetMessage(&msg, NULL, 0, 0)) { - TranslateMessage(&msg); - DispatchMessage(&msg); - } - - - /* OK, we're done: clean up all image and Windows resources and go away */ - - rpng_win_cleanup(); - - return msg.wParam; -} - - - - - -static int rpng_win_create_window(HINSTANCE hInst, int showmode) -{ - uch *dest; - int extra_width, extra_height; - ulg i, j; - WNDCLASSEX wndclass; - - -/*--------------------------------------------------------------------------- - Allocate memory for the display-specific version of the image (round up - to multiple of 4 for Windows DIB). - ---------------------------------------------------------------------------*/ - - wimage_rowbytes = ((3*image_width + 3L) >> 2) << 2; - - /* Guard against integer overflow */ - if (image_height > ((size_t)(-1))/wimage_rowbytes) { - fprintf(stderr, PROGNAME ": image_data buffer would be too large\n"); - return 4; /* fail */ - } - - if (!(dib = (uch *)malloc(sizeof(BITMAPINFOHEADER) + - wimage_rowbytes*image_height))) - { - return 4; /* fail */ - } - -/*--------------------------------------------------------------------------- - Initialize the DIB. Negative height means to use top-down BMP ordering - (must be uncompressed, but that's what we want). Bit count of 1, 4 or 8 - implies a colormap of RGBX quads, but 24-bit BMPs just use B,G,R values - directly => wimage_data begins immediately after BMP header. - ---------------------------------------------------------------------------*/ - - memset(dib, 0, sizeof(BITMAPINFOHEADER)); - bmih = (BITMAPINFOHEADER *)dib; - bmih->biSize = sizeof(BITMAPINFOHEADER); - bmih->biWidth = image_width; - bmih->biHeight = -((long)image_height); - bmih->biPlanes = 1; - bmih->biBitCount = 24; - bmih->biCompression = 0; - wimage_data = dib + sizeof(BITMAPINFOHEADER); - -/*--------------------------------------------------------------------------- - Fill in background color (black by default); data are in BGR order. - ---------------------------------------------------------------------------*/ - - for (j = 0; j < image_height; ++j) { - dest = wimage_data + j*wimage_rowbytes; - for (i = image_width; i > 0; --i) { - *dest++ = bg_blue; - *dest++ = bg_green; - *dest++ = bg_red; - } - } - -/*--------------------------------------------------------------------------- - Set the window parameters. - ---------------------------------------------------------------------------*/ - - memset(&wndclass, 0, sizeof(wndclass)); - - wndclass.cbSize = sizeof(wndclass); - wndclass.style = CS_HREDRAW | CS_VREDRAW; - wndclass.lpfnWndProc = rpng_win_wndproc; - wndclass.hInstance = hInst; - wndclass.hIcon = LoadIcon(NULL, IDI_APPLICATION); - wndclass.hCursor = LoadCursor(NULL, IDC_ARROW); - wndclass.hbrBackground = (HBRUSH)GetStockObject(DKGRAY_BRUSH); - wndclass.lpszMenuName = NULL; - wndclass.lpszClassName = progname; - wndclass.hIconSm = LoadIcon(NULL, IDI_APPLICATION); - - RegisterClassEx(&wndclass); - -/*--------------------------------------------------------------------------- - Finally, create the window. - ---------------------------------------------------------------------------*/ - - extra_width = 2*(GetSystemMetrics(SM_CXBORDER) + - GetSystemMetrics(SM_CXDLGFRAME)); - extra_height = 2*(GetSystemMetrics(SM_CYBORDER) + - GetSystemMetrics(SM_CYDLGFRAME)) + - GetSystemMetrics(SM_CYCAPTION); - - global_hwnd = CreateWindow(progname, titlebar, WS_OVERLAPPEDWINDOW, - CW_USEDEFAULT, CW_USEDEFAULT, image_width+extra_width, - image_height+extra_height, NULL, NULL, hInst, NULL); - - ShowWindow(global_hwnd, showmode); - UpdateWindow(global_hwnd); - - return 0; - -} /* end function rpng_win_create_window() */ - - - - - -static int rpng_win_display_image() -{ - uch *src, *dest; - uch r, g, b, a; - ulg i, row, lastrow; - RECT rect; - - - Trace((stderr, "beginning display loop (image_channels == %d)\n", - image_channels)) - Trace((stderr, "(width = %ld, rowbytes = %ld, wimage_rowbytes = %d)\n", - image_width, image_rowbytes, wimage_rowbytes)) - - -/*--------------------------------------------------------------------------- - Blast image data to buffer. This whole routine takes place before the - message loop begins, so there's no real point in any pseudo-progressive - display... - ---------------------------------------------------------------------------*/ - - for (lastrow = row = 0; row < image_height; ++row) { - src = image_data + row*image_rowbytes; - dest = wimage_data + row*wimage_rowbytes; - if (image_channels == 3) { - for (i = image_width; i > 0; --i) { - r = *src++; - g = *src++; - b = *src++; - *dest++ = b; - *dest++ = g; /* note reverse order */ - *dest++ = r; - } - } else /* if (image_channels == 4) */ { - for (i = image_width; i > 0; --i) { - r = *src++; - g = *src++; - b = *src++; - a = *src++; - if (a == 255) { - *dest++ = b; - *dest++ = g; - *dest++ = r; - } else if (a == 0) { - *dest++ = bg_blue; - *dest++ = bg_green; - *dest++ = bg_red; - } else { - /* this macro (copied from png.h) composites the - * foreground and background values and puts the - * result into the first argument; there are no - * side effects with the first argument */ - alpha_composite(*dest++, b, a, bg_blue); - alpha_composite(*dest++, g, a, bg_green); - alpha_composite(*dest++, r, a, bg_red); - } - } - } - /* display after every 16 lines */ - if (((row+1) & 0xf) == 0) { - rect.left = 0L; - rect.top = (LONG)lastrow; - rect.right = (LONG)image_width; /* possibly off by one? */ - rect.bottom = (LONG)lastrow + 16L; /* possibly off by one? */ - InvalidateRect(global_hwnd, &rect, FALSE); - UpdateWindow(global_hwnd); /* similar to XFlush() */ - lastrow = row + 1; - } - } - - Trace((stderr, "calling final image-flush routine\n")) - if (lastrow < image_height) { - rect.left = 0L; - rect.top = (LONG)lastrow; - rect.right = (LONG)image_width; /* possibly off by one? */ - rect.bottom = (LONG)image_height; /* possibly off by one? */ - InvalidateRect(global_hwnd, &rect, FALSE); - UpdateWindow(global_hwnd); /* similar to XFlush() */ - } - -/* - last param determines whether or not background is wiped before paint - InvalidateRect(global_hwnd, NULL, TRUE); - UpdateWindow(global_hwnd); - */ - - return 0; -} - - - - - -static void rpng_win_cleanup() -{ - if (image_data) { - free(image_data); - image_data = NULL; - } - - if (dib) { - free(dib); - dib = NULL; - } -} - - - - - -LRESULT CALLBACK rpng_win_wndproc(HWND hwnd, UINT iMsg, WPARAM wP, LPARAM lP) -{ - HDC hdc; - PAINTSTRUCT ps; - int rc; - - switch (iMsg) { - case WM_CREATE: - /* one-time processing here, if any */ - return 0; - - case WM_PAINT: - hdc = BeginPaint(hwnd, &ps); - /* dest */ - rc = StretchDIBits(hdc, 0, 0, image_width, image_height, - /* source */ - 0, 0, image_width, image_height, - wimage_data, (BITMAPINFO *)bmih, - /* iUsage: no clue */ - 0, SRCCOPY); - EndPaint(hwnd, &ps); - return 0; - - /* wait for the user to tell us when to quit */ - case WM_CHAR: - switch (wP) { /* only need one, so ignore repeat count */ - case 'q': - case 'Q': - case 0x1B: /* Esc key */ - PostQuitMessage(0); - } - return 0; - - case WM_LBUTTONDOWN: /* another way of quitting */ - case WM_DESTROY: - PostQuitMessage(0); - return 0; - } - - return DefWindowProc(hwnd, iMsg, wP, lP); -} diff --git a/lib/libpng-1.6.37/contrib/gregbook/rpng-x.c b/lib/libpng-1.6.37/contrib/gregbook/rpng-x.c deleted file mode 100644 index 92effaa..0000000 --- a/lib/libpng-1.6.37/contrib/gregbook/rpng-x.c +++ /dev/null @@ -1,911 +0,0 @@ -/*--------------------------------------------------------------------------- - - rpng - simple PNG display program rpng-x.c - - This program decodes and displays PNG images, with gamma correction and - optionally with a user-specified background color (in case the image has - transparency). It is very nearly the most basic PNG viewer possible. - This version is for the X Window System (tested by author under Unix and - by Martin Zinser under OpenVMS; may work under OS/2 with some tweaking). - - to do: - - 8-bit (colormapped) X support - - use %.1023s to simplify truncation of title-bar string? - - --------------------------------------------------------------------------- - - Changelog: - - 1.01: initial public release - - 1.02: modified to allow abbreviated options; fixed long/ulong mis- - match; switched to png_jmpbuf() macro - - 1.10: added support for non-default visuals; fixed X pixel-conversion - - 1.11: added extra set of parentheses to png_jmpbuf() macro; fixed - command-line parsing bug - - 1.12: fixed some small X memory leaks (thanks to Franois Petitjean) - - 1.13: fixed XFreeGC() crash bug (thanks to Patrick Welche) - - 1.14: added support for X resources (thanks to Gerhard Niklasch) - - 2.00: dual-licensed (added GNU GPL) - - 2.01: fixed improper display of usage screen on PNG error(s) - - 2.02: Added "void(argc);" statement to quiet pedantic compiler warnings - about unused variable (GR-P) - - 2.03: check for integer overflow (Glenn R-P) - - --------------------------------------------------------------------------- - - Copyright (c) 1998-2008, 2017 Greg Roelofs. All rights reserved. - - This software is provided "as is," without warranty of any kind, - express or implied. In no event shall the author or contributors - be held liable for any damages arising in any way from the use of - this software. - - The contents of this file are DUAL-LICENSED. You may modify and/or - redistribute this software according to the terms of one of the - following two licenses (at your option): - - - LICENSE 1 ("BSD-like with advertising clause"): - - Permission is granted to anyone to use this software for any purpose, - including commercial applications, and to alter it and redistribute - it freely, subject to the following restrictions: - - 1. Redistributions of source code must retain the above copyright - notice, disclaimer, and this list of conditions. - 2. Redistributions in binary form must reproduce the above copyright - notice, disclaimer, and this list of conditions in the documenta- - tion and/or other materials provided with the distribution. - 3. All advertising materials mentioning features or use of this - software must display the following acknowledgment: - - This product includes software developed by Greg Roelofs - and contributors for the book, "PNG: The Definitive Guide," - published by O'Reilly and Associates. - - - LICENSE 2 (GNU GPL v2 or later): - - This program is free software; you can redistribute it and/or modify - it under the terms of the GNU General Public License as published by - the Free Software Foundation; either version 2 of the License, or - (at your option) any later version. - - This program is distributed in the hope that it will be useful, - but WITHOUT ANY WARRANTY; without even the implied warranty of - MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - GNU General Public License for more details. - - You should have received a copy of the GNU General Public License - along with this program; if not, write to the Free Software Foundation, - Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA - - ---------------------------------------------------------------------------*/ - -#define PROGNAME "rpng-x" -#define LONGNAME "Simple PNG Viewer for X" -#define VERSION "2.02 of 15 June 2014" -#define RESNAME "rpng" /* our X resource application name */ -#define RESCLASS "Rpng" /* our X resource class name */ - -#include -#include -#include -#include -#include -#include -#include -#include - -/* #define DEBUG : this enables the Trace() macros */ - -#include "readpng.h" /* typedefs, common macros, readpng prototypes */ - - -/* could just include png.h, but this macro is the only thing we need - * (name and typedefs changed to local versions); note that side effects - * only happen with alpha (which could easily be avoided with - * "ush acopy = (alpha);") */ - -#define alpha_composite(composite, fg, alpha, bg) { \ - ush temp = ((ush)(fg)*(ush)(alpha) + \ - (ush)(bg)*(ush)(255 - (ush)(alpha)) + (ush)128); \ - (composite) = (uch)((temp + (temp >> 8)) >> 8); \ -} - - -/* local prototypes */ -static int rpng_x_create_window(void); -static int rpng_x_display_image(void); -static void rpng_x_cleanup(void); -static int rpng_x_msb(ulg u32val); - - -static char titlebar[1024], *window_name = titlebar; -static char *appname = LONGNAME; -static char *icon_name = PROGNAME; -static char *res_name = RESNAME; -static char *res_class = RESCLASS; -static char *filename; -static FILE *infile; - -static char *bgstr; -static uch bg_red=0, bg_green=0, bg_blue=0; - -static double display_exponent; - -static ulg image_width, image_height, image_rowbytes; -static int image_channels; -static uch *image_data; - -/* X-specific variables */ -static char *displayname; -static XImage *ximage; -static Display *display; -static int depth; -static Visual *visual; -static XVisualInfo *visual_list; -static int RShift, GShift, BShift; -static ulg RMask, GMask, BMask; -static Window window; -static GC gc; -static Colormap colormap; - -static int have_nondefault_visual = FALSE; -static int have_colormap = FALSE; -static int have_window = FALSE; -static int have_gc = FALSE; -/* -ulg numcolors=0, pixels[256]; -ush reds[256], greens[256], blues[256]; - */ - - - - -int main(int argc, char **argv) -{ -#ifdef sgi - char tmpline[80]; -#endif - char *p; - int rc, alen, flen; - int error = 0; - int have_bg = FALSE; - double LUT_exponent; /* just the lookup table */ - double CRT_exponent = 2.2; /* just the monitor */ - double default_display_exponent; /* whole display system */ - XEvent e; - KeySym k; - - - displayname = (char *)NULL; - filename = (char *)NULL; - - - /* First set the default value for our display-system exponent, i.e., - * the product of the CRT exponent and the exponent corresponding to - * the frame-buffer's lookup table (LUT), if any. This is not an - * exhaustive list of LUT values (e.g., OpenStep has a lot of weird - * ones), but it should cover 99% of the current possibilities. */ - -#if defined(NeXT) - LUT_exponent = 1.0 / 2.2; - /* - if (some_next_function_that_returns_gamma(&next_gamma)) - LUT_exponent = 1.0 / next_gamma; - */ -#elif defined(sgi) - LUT_exponent = 1.0 / 1.7; - /* there doesn't seem to be any documented function to get the - * "gamma" value, so we do it the hard way */ - infile = fopen("/etc/config/system.glGammaVal", "r"); - if (infile) { - double sgi_gamma; - - fgets(tmpline, 80, infile); - fclose(infile); - sgi_gamma = atof(tmpline); - if (sgi_gamma > 0.0) - LUT_exponent = 1.0 / sgi_gamma; - } -#elif defined(Macintosh) - LUT_exponent = 1.8 / 2.61; - /* - if (some_mac_function_that_returns_gamma(&mac_gamma)) - LUT_exponent = mac_gamma / 2.61; - */ -#else - LUT_exponent = 1.0; /* assume no LUT: most PCs */ -#endif - - /* the defaults above give 1.0, 1.3, 1.5 and 2.2, respectively: */ - default_display_exponent = LUT_exponent * CRT_exponent; - - - /* If the user has set the SCREEN_GAMMA environment variable as suggested - * (somewhat imprecisely) in the libpng documentation, use that; otherwise - * use the default value we just calculated. Either way, the user may - * override this via a command-line option. */ - - if ((p = getenv("SCREEN_GAMMA")) != NULL) - display_exponent = atof(p); - else - display_exponent = default_display_exponent; - - - /* Now parse the command line for options and the PNG filename. */ - - while (*++argv && !error) { - if (!strncmp(*argv, "-display", 2)) { - if (!*++argv) - ++error; - else - displayname = *argv; - } else if (!strncmp(*argv, "-gamma", 2)) { - if (!*++argv) - ++error; - else { - display_exponent = atof(*argv); - if (display_exponent <= 0.0) - ++error; - } - } else if (!strncmp(*argv, "-bgcolor", 2)) { - if (!*++argv) - ++error; - else { - bgstr = *argv; - if (strlen(bgstr) != 7 || bgstr[0] != '#') - ++error; - else - have_bg = TRUE; - } - } else { - if (**argv != '-') { - filename = *argv; - if (argv[1]) /* shouldn't be any more args after filename */ - ++error; - } else - ++error; /* not expecting any other options */ - } - } - - if (!filename) - ++error; - - - /* print usage screen if any errors up to this point */ - - if (error) { - fprintf(stderr, "\n%s %s: %s\n", PROGNAME, VERSION, appname); - readpng_version_info(); - fprintf(stderr, "\n" - "Usage: %s [-display xdpy] [-gamma exp] [-bgcolor bg] file.png\n" - " xdpy\tname of the target X display (e.g., ``hostname:0'')\n" - " exp \ttransfer-function exponent (``gamma'') of the display\n" - "\t\t system in floating-point format (e.g., ``%.1f''); equal\n", - PROGNAME, default_display_exponent); - - fprintf(stderr, "\n" - "\t\t to the product of the lookup-table exponent (varies)\n" - "\t\t and the CRT exponent (usually 2.2); must be positive\n" - " bg \tdesired background color in 7-character hex RGB format\n" - "\t\t (e.g., ``#ff7700'' for orange: same as HTML colors);\n" - "\t\t used with transparent images\n" - "\nPress Q, Esc or mouse button 1 (within image window, after image\n" - "is displayed) to quit.\n"); - exit(1); - } - - - if (!(infile = fopen(filename, "rb"))) { - fprintf(stderr, PROGNAME ": can't open PNG file [%s]\n", filename); - ++error; - } else { - if ((rc = readpng_init(infile, &image_width, &image_height)) != 0) { - switch (rc) { - case 1: - fprintf(stderr, PROGNAME - ": [%s] is not a PNG file: incorrect signature\n", - filename); - break; - case 2: - fprintf(stderr, PROGNAME - ": [%s] has bad IHDR (libpng longjmp)\n", filename); - break; - case 4: - fprintf(stderr, PROGNAME ": insufficient memory\n"); - break; - default: - fprintf(stderr, PROGNAME - ": unknown readpng_init() error\n"); - break; - } - ++error; - } else { - display = XOpenDisplay(displayname); - if (!display) { - readpng_cleanup(TRUE); - fprintf(stderr, PROGNAME ": can't open X display [%s]\n", - displayname? displayname : "default"); - ++error; - } - } - if (error) - fclose(infile); - } - - - if (error) { - fprintf(stderr, PROGNAME ": aborting.\n"); - exit(2); - } - - - /* set the title-bar string, but make sure buffer doesn't overflow */ - - alen = strlen(appname); - flen = strlen(filename); - if (alen + flen + 3 > 1023) - sprintf(titlebar, "%s: ...%s", appname, filename+(alen+flen+6-1023)); - else - sprintf(titlebar, "%s: %s", appname, filename); - - - /* if the user didn't specify a background color on the command line, - * check for one in the PNG file--if not, the initialized values of 0 - * (black) will be used */ - - if (have_bg) { - unsigned r, g, b; /* this approach quiets compiler warnings */ - - sscanf(bgstr+1, "%2x%2x%2x", &r, &g, &b); - bg_red = (uch)r; - bg_green = (uch)g; - bg_blue = (uch)b; - } else if (readpng_get_bgcolor(&bg_red, &bg_green, &bg_blue) > 1) { - readpng_cleanup(TRUE); - fprintf(stderr, PROGNAME - ": libpng error while checking for background color\n"); - exit(2); - } - - - /* do the basic X initialization stuff, make the window and fill it - * with the background color */ - - if (rpng_x_create_window()) - exit(2); - - - /* decode the image, all at once */ - - Trace((stderr, "calling readpng_get_image()\n")) - image_data = readpng_get_image(display_exponent, &image_channels, - &image_rowbytes); - Trace((stderr, "done with readpng_get_image()\n")) - - - /* done with PNG file, so clean up to minimize memory usage (but do NOT - * nuke image_data!) */ - - readpng_cleanup(FALSE); - fclose(infile); - - if (!image_data) { - fprintf(stderr, PROGNAME ": unable to decode PNG image\n"); - exit(3); - } - - - /* display image (composite with background if requested) */ - - Trace((stderr, "calling rpng_x_display_image()\n")) - if (rpng_x_display_image()) { - free(image_data); - exit(4); - } - Trace((stderr, "done with rpng_x_display_image()\n")) - - - /* wait for the user to tell us when to quit */ - - printf( - "Done. Press Q, Esc or mouse button 1 (within image window) to quit.\n"); - fflush(stdout); - - do - XNextEvent(display, &e); - while (!(e.type == ButtonPress && e.xbutton.button == Button1) && - !(e.type == KeyPress && /* v--- or 1 for shifted keys */ - ((k = XLookupKeysym(&e.xkey, 0)) == XK_q || k == XK_Escape) )); - - - /* OK, we're done: clean up all image and X resources and go away */ - - rpng_x_cleanup(); - - (void)argc; /* Unused */ - - return 0; -} - - - - - -static int rpng_x_create_window(void) -{ - uch *xdata; - int need_colormap = FALSE; - int screen, pad; - ulg bg_pixel = 0L; - ulg attrmask; - Window root; - XEvent e; - XGCValues gcvalues; - XSetWindowAttributes attr; - XTextProperty windowName, *pWindowName = &windowName; - XTextProperty iconName, *pIconName = &iconName; - XVisualInfo visual_info; - XSizeHints *size_hints; - XWMHints *wm_hints; - XClassHint *class_hints; - - - screen = DefaultScreen(display); - depth = DisplayPlanes(display, screen); - root = RootWindow(display, screen); - -#ifdef DEBUG - XSynchronize(display, True); -#endif - -#if 0 -/* GRR: add 8-bit support */ - if (/* depth != 8 && */ depth != 16 && depth != 24 && depth != 32) { - fprintf(stderr, - "screen depth %d not supported (only 16-, 24- or 32-bit TrueColor)\n", - depth); - return 2; - } - - XMatchVisualInfo(display, screen, depth, - (depth == 8)? PseudoColor : TrueColor, &visual_info); - visual = visual_info.visual; -#else - if (depth != 16 && depth != 24 && depth != 32) { - int visuals_matched = 0; - - Trace((stderr, "default depth is %d: checking other visuals\n", - depth)) - - /* 24-bit first */ - visual_info.screen = screen; - visual_info.depth = 24; - visual_list = XGetVisualInfo(display, - VisualScreenMask | VisualDepthMask, &visual_info, &visuals_matched); - if (visuals_matched == 0) { -/* GRR: add 15-, 16- and 32-bit TrueColor visuals (also DirectColor?) */ - fprintf(stderr, "default screen depth %d not supported, and no" - " 24-bit visuals found\n", depth); - return 2; - } - Trace((stderr, "XGetVisualInfo() returned %d 24-bit visuals\n", - visuals_matched)) - visual = visual_list[0].visual; - depth = visual_list[0].depth; -/* - colormap_size = visual_list[0].colormap_size; - visual_class = visual->class; - visualID = XVisualIDFromVisual(visual); - */ - have_nondefault_visual = TRUE; - need_colormap = TRUE; - } else { - XMatchVisualInfo(display, screen, depth, TrueColor, &visual_info); - visual = visual_info.visual; - } -#endif - - RMask = visual->red_mask; - GMask = visual->green_mask; - BMask = visual->blue_mask; - -/* GRR: add/check 8-bit support */ - if (depth == 8 || need_colormap) { - colormap = XCreateColormap(display, root, visual, AllocNone); - if (!colormap) { - fprintf(stderr, "XCreateColormap() failed\n"); - return 2; - } - have_colormap = TRUE; - } - if (depth == 15 || depth == 16) { - RShift = 15 - rpng_x_msb(RMask); /* these are right-shifts */ - GShift = 15 - rpng_x_msb(GMask); - BShift = 15 - rpng_x_msb(BMask); - } else if (depth > 16) { -#define NO_24BIT_MASKS -#ifdef NO_24BIT_MASKS - RShift = rpng_x_msb(RMask) - 7; /* these are left-shifts */ - GShift = rpng_x_msb(GMask) - 7; - BShift = rpng_x_msb(BMask) - 7; -#else - RShift = 7 - rpng_x_msb(RMask); /* these are right-shifts, too */ - GShift = 7 - rpng_x_msb(GMask); - BShift = 7 - rpng_x_msb(BMask); -#endif - } - if (depth >= 15 && (RShift < 0 || GShift < 0 || BShift < 0)) { - fprintf(stderr, "rpng internal logic error: negative X shift(s)!\n"); - return 2; - } - -/*--------------------------------------------------------------------------- - Finally, create the window. - ---------------------------------------------------------------------------*/ - - attr.backing_store = Always; - attr.event_mask = ExposureMask | KeyPressMask | ButtonPressMask; - attrmask = CWBackingStore | CWEventMask; - if (have_nondefault_visual) { - attr.colormap = colormap; - attr.background_pixel = 0; - attr.border_pixel = 1; - attrmask |= CWColormap | CWBackPixel | CWBorderPixel; - } - - window = XCreateWindow(display, root, 0, 0, image_width, image_height, 0, - depth, InputOutput, visual, attrmask, &attr); - - if (window == None) { - fprintf(stderr, "XCreateWindow() failed\n"); - return 2; - } else - have_window = TRUE; - - if (depth == 8) - XSetWindowColormap(display, window, colormap); - - if (!XStringListToTextProperty(&window_name, 1, pWindowName)) - pWindowName = NULL; - if (!XStringListToTextProperty(&icon_name, 1, pIconName)) - pIconName = NULL; - - /* OK if any hints allocation fails; XSetWMProperties() allows NULLs */ - - if ((size_hints = XAllocSizeHints()) != NULL) { - /* window will not be resizable */ - size_hints->flags = PMinSize | PMaxSize; - size_hints->min_width = size_hints->max_width = (int)image_width; - size_hints->min_height = size_hints->max_height = (int)image_height; - } - - if ((wm_hints = XAllocWMHints()) != NULL) { - wm_hints->initial_state = NormalState; - wm_hints->input = True; - /* wm_hints->icon_pixmap = icon_pixmap; */ - wm_hints->flags = StateHint | InputHint /* | IconPixmapHint */ ; - } - - if ((class_hints = XAllocClassHint()) != NULL) { - class_hints->res_name = res_name; - class_hints->res_class = res_class; - } - - XSetWMProperties(display, window, pWindowName, pIconName, NULL, 0, - size_hints, wm_hints, class_hints); - - /* various properties and hints no longer needed; free memory */ - if (pWindowName) - XFree(pWindowName->value); - if (pIconName) - XFree(pIconName->value); - if (size_hints) - XFree(size_hints); - if (wm_hints) - XFree(wm_hints); - if (class_hints) - XFree(class_hints); - - XMapWindow(display, window); - - gc = XCreateGC(display, window, 0, &gcvalues); - have_gc = TRUE; - -/*--------------------------------------------------------------------------- - Fill window with the specified background color. - ---------------------------------------------------------------------------*/ - - if (depth == 24 || depth == 32) { - bg_pixel = ((ulg)bg_red << RShift) | - ((ulg)bg_green << GShift) | - ((ulg)bg_blue << BShift); - } else if (depth == 16) { - bg_pixel = ((((ulg)bg_red << 8) >> RShift) & RMask) | - ((((ulg)bg_green << 8) >> GShift) & GMask) | - ((((ulg)bg_blue << 8) >> BShift) & BMask); - } else /* depth == 8 */ { - - /* GRR: add 8-bit support */ - - } - - XSetForeground(display, gc, bg_pixel); - XFillRectangle(display, window, gc, 0, 0, image_width, image_height); - -/*--------------------------------------------------------------------------- - Wait for first Expose event to do any drawing, then flush. - ---------------------------------------------------------------------------*/ - - do - XNextEvent(display, &e); - while (e.type != Expose || e.xexpose.count); - - XFlush(display); - -/*--------------------------------------------------------------------------- - Allocate memory for the X- and display-specific version of the image. - ---------------------------------------------------------------------------*/ - - if (depth == 24 || depth == 32) { - xdata = (uch *)malloc(4*image_width*image_height); - pad = 32; - } else if (depth == 16) { - xdata = (uch *)malloc(2*image_width*image_height); - pad = 16; - } else /* depth == 8 */ { - xdata = (uch *)malloc(image_width*image_height); - pad = 8; - } - - if (!xdata) { - fprintf(stderr, PROGNAME ": unable to allocate image memory\n"); - return 4; - } - - ximage = XCreateImage(display, visual, depth, ZPixmap, 0, - (char *)xdata, image_width, image_height, pad, 0); - - if (!ximage) { - fprintf(stderr, PROGNAME ": XCreateImage() failed\n"); - free(xdata); - return 3; - } - - /* to avoid testing the byte order every pixel (or doubling the size of - * the drawing routine with a giant if-test), we arbitrarily set the byte - * order to MSBFirst and let Xlib worry about inverting things on little- - * endian machines (like Linux/x86, old VAXen, etc.)--this is not the most - * efficient approach (the giant if-test would be better), but in the - * interest of clarity, we take the easy way out... */ - - ximage->byte_order = MSBFirst; - - return 0; - -} /* end function rpng_x_create_window() */ - - - - - -static int rpng_x_display_image(void) -{ - uch *src; - char *dest; - uch r, g, b, a; - ulg i, row, lastrow = 0; - ulg pixel; - int ximage_rowbytes = ximage->bytes_per_line; -/* int bpp = ximage->bits_per_pixel; */ - - - Trace((stderr, "beginning display loop (image_channels == %d)\n", - image_channels)) - Trace((stderr, " (width = %ld, rowbytes = %ld, ximage_rowbytes = %d)\n", - image_width, image_rowbytes, ximage_rowbytes)) - Trace((stderr, " (bpp = %d)\n", ximage->bits_per_pixel)) - Trace((stderr, " (byte_order = %s)\n", ximage->byte_order == MSBFirst? - "MSBFirst" : (ximage->byte_order == LSBFirst? "LSBFirst" : "unknown"))) - - if (depth == 24 || depth == 32) { - ulg red, green, blue; - - for (lastrow = row = 0; row < image_height; ++row) { - src = image_data + row*image_rowbytes; - dest = ximage->data + row*ximage_rowbytes; - if (image_channels == 3) { - for (i = image_width; i > 0; --i) { - red = *src++; - green = *src++; - blue = *src++; -#ifdef NO_24BIT_MASKS - pixel = (red << RShift) | - (green << GShift) | - (blue << BShift); - /* recall that we set ximage->byte_order = MSBFirst above */ - /* GRR BUG: this assumes bpp == 32, but may be 24: */ - *dest++ = (char)((pixel >> 24) & 0xff); - *dest++ = (char)((pixel >> 16) & 0xff); - *dest++ = (char)((pixel >> 8) & 0xff); - *dest++ = (char)( pixel & 0xff); -#else - red = (RShift < 0)? red << (-RShift) : red >> RShift; - green = (GShift < 0)? green << (-GShift) : green >> GShift; - blue = (BShift < 0)? blue << (-BShift) : blue >> BShift; - pixel = (red & RMask) | (green & GMask) | (blue & BMask); - /* recall that we set ximage->byte_order = MSBFirst above */ - *dest++ = (char)((pixel >> 24) & 0xff); - *dest++ = (char)((pixel >> 16) & 0xff); - *dest++ = (char)((pixel >> 8) & 0xff); - *dest++ = (char)( pixel & 0xff); -#endif - } - } else /* if (image_channels == 4) */ { - for (i = image_width; i > 0; --i) { - r = *src++; - g = *src++; - b = *src++; - a = *src++; - if (a == 255) { - red = r; - green = g; - blue = b; - } else if (a == 0) { - red = bg_red; - green = bg_green; - blue = bg_blue; - } else { - /* this macro (from png.h) composites the foreground - * and background values and puts the result into the - * first argument */ - alpha_composite(red, r, a, bg_red); - alpha_composite(green, g, a, bg_green); - alpha_composite(blue, b, a, bg_blue); - } - pixel = (red << RShift) | - (green << GShift) | - (blue << BShift); - /* recall that we set ximage->byte_order = MSBFirst above */ - *dest++ = (char)((pixel >> 24) & 0xff); - *dest++ = (char)((pixel >> 16) & 0xff); - *dest++ = (char)((pixel >> 8) & 0xff); - *dest++ = (char)( pixel & 0xff); - } - } - /* display after every 16 lines */ - if (((row+1) & 0xf) == 0) { - XPutImage(display, window, gc, ximage, 0, (int)lastrow, 0, - (int)lastrow, image_width, 16); - XFlush(display); - lastrow = row + 1; - } - } - - } else if (depth == 16) { - ush red, green, blue; - - for (lastrow = row = 0; row < image_height; ++row) { - src = image_data + row*image_rowbytes; - dest = ximage->data + row*ximage_rowbytes; - if (image_channels == 3) { - for (i = image_width; i > 0; --i) { - red = ((ush)(*src) << 8); - ++src; - green = ((ush)(*src) << 8); - ++src; - blue = ((ush)(*src) << 8); - ++src; - pixel = ((red >> RShift) & RMask) | - ((green >> GShift) & GMask) | - ((blue >> BShift) & BMask); - /* recall that we set ximage->byte_order = MSBFirst above */ - *dest++ = (char)((pixel >> 8) & 0xff); - *dest++ = (char)( pixel & 0xff); - } - } else /* if (image_channels == 4) */ { - for (i = image_width; i > 0; --i) { - r = *src++; - g = *src++; - b = *src++; - a = *src++; - if (a == 255) { - red = ((ush)r << 8); - green = ((ush)g << 8); - blue = ((ush)b << 8); - } else if (a == 0) { - red = ((ush)bg_red << 8); - green = ((ush)bg_green << 8); - blue = ((ush)bg_blue << 8); - } else { - /* this macro (from png.h) composites the foreground - * and background values and puts the result back into - * the first argument (== fg byte here: safe) */ - alpha_composite(r, r, a, bg_red); - alpha_composite(g, g, a, bg_green); - alpha_composite(b, b, a, bg_blue); - red = ((ush)r << 8); - green = ((ush)g << 8); - blue = ((ush)b << 8); - } - pixel = ((red >> RShift) & RMask) | - ((green >> GShift) & GMask) | - ((blue >> BShift) & BMask); - /* recall that we set ximage->byte_order = MSBFirst above */ - *dest++ = (char)((pixel >> 8) & 0xff); - *dest++ = (char)( pixel & 0xff); - } - } - /* display after every 16 lines */ - if (((row+1) & 0xf) == 0) { - XPutImage(display, window, gc, ximage, 0, (int)lastrow, 0, - (int)lastrow, image_width, 16); - XFlush(display); - lastrow = row + 1; - } - } - - } else /* depth == 8 */ { - - /* GRR: add 8-bit support */ - - } - - Trace((stderr, "calling final XPutImage()\n")) - if (lastrow < image_height) { - XPutImage(display, window, gc, ximage, 0, (int)lastrow, 0, - (int)lastrow, image_width, image_height-lastrow); - XFlush(display); - } - - return 0; -} - - - - -static void rpng_x_cleanup(void) -{ - if (image_data) { - free(image_data); - image_data = NULL; - } - - if (ximage) { - if (ximage->data) { - free(ximage->data); /* we allocated it, so we free it */ - ximage->data = (char *)NULL; /* instead of XDestroyImage() */ - } - XDestroyImage(ximage); - ximage = NULL; - } - - if (have_gc) - XFreeGC(display, gc); - - if (have_window) - XDestroyWindow(display, window); - - if (have_colormap) - XFreeColormap(display, colormap); - - if (have_nondefault_visual) - XFree(visual_list); -} - - - - - -static int rpng_x_msb(ulg u32val) -{ - int i; - - for (i = 31; i >= 0; --i) { - if (u32val & 0x80000000L) - break; - u32val <<= 1; - } - return i; -} diff --git a/lib/libpng-1.6.37/contrib/gregbook/rpng2-win.c b/lib/libpng-1.6.37/contrib/gregbook/rpng2-win.c deleted file mode 100644 index ed6b526..0000000 --- a/lib/libpng-1.6.37/contrib/gregbook/rpng2-win.c +++ /dev/null @@ -1,1261 +0,0 @@ -/*--------------------------------------------------------------------------- - - rpng2 - progressive-model PNG display program rpng2-win.c - - This program decodes and displays PNG files progressively, as if it were - a web browser (though the front end is only set up to read from files). - It supports gamma correction, user-specified background colors, and user- - specified background patterns (for transparent images). This version is - for 32-bit Windows; it may compile under 16-bit Windows with a little - tweaking (or maybe not). Thanks to Adam Costello and Pieter S. van der - Meulen for the "diamond" and "radial waves" patterns, respectively. - - to do (someday, maybe): - - handle quoted command-line args (especially filenames with spaces) - - finish resizable checkerboard-gradient (sizes 4-128?) - - use %.1023s to simplify truncation of title-bar string? - - have minimum window width: oh well - - --------------------------------------------------------------------------- - - Changelog: - - 1.01: initial public release - - 1.02: fixed cut-and-paste error in usage screen (oops...) - - 1.03: modified to allow abbreviated options - - 1.04: removed bogus extra argument from usage fprintf() [Glenn R-P?]; - fixed command-line parsing bug - - 1.10: enabled "message window"/console (thanks to David Geldreich) - - 1.20: added runtime MMX-enabling/disabling and new -mmx* options - - 1.21: made minor tweak to usage screen to fit within 25-line console - - 1.22: added AMD64/EM64T support (__x86_64__) - - 2.00: dual-licensed (added GNU GPL) - - 2.01: fixed 64-bit typo in readpng2.c - - 2.02: fixed improper display of usage screen on PNG error(s); fixed - unexpected-EOF and file-read-error cases - - 2.03: removed runtime MMX-enabling/disabling and obsolete -mmx* options - - 2.04: check for integer overflow (Glenn R-P) - - --------------------------------------------------------------------------- - - Copyright (c) 1998-2008, 2017 Greg Roelofs. All rights reserved. - - This software is provided "as is," without warranty of any kind, - express or implied. In no event shall the author or contributors - be held liable for any damages arising in any way from the use of - this software. - - The contents of this file are DUAL-LICENSED. You may modify and/or - redistribute this software according to the terms of one of the - following two licenses (at your option): - - - LICENSE 1 ("BSD-like with advertising clause"): - - Permission is granted to anyone to use this software for any purpose, - including commercial applications, and to alter it and redistribute - it freely, subject to the following restrictions: - - 1. Redistributions of source code must retain the above copyright - notice, disclaimer, and this list of conditions. - 2. Redistributions in binary form must reproduce the above copyright - notice, disclaimer, and this list of conditions in the documenta- - tion and/or other materials provided with the distribution. - 3. All advertising materials mentioning features or use of this - software must display the following acknowledgment: - - This product includes software developed by Greg Roelofs - and contributors for the book, "PNG: The Definitive Guide," - published by O'Reilly and Associates. - - - LICENSE 2 (GNU GPL v2 or later): - - This program is free software; you can redistribute it and/or modify - it under the terms of the GNU General Public License as published by - the Free Software Foundation; either version 2 of the License, or - (at your option) any later version. - - This program is distributed in the hope that it will be useful, - but WITHOUT ANY WARRANTY; without even the implied warranty of - MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - GNU General Public License for more details. - - You should have received a copy of the GNU General Public License - along with this program; if not, write to the Free Software Foundation, - Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA - - ---------------------------------------------------------------------------*/ - -#define PROGNAME "rpng2-win" -#define LONGNAME "Progressive PNG Viewer for Windows" -#define VERSION "2.02 of 16 March 2008" - -#include -#include -#include -#include /* for jmpbuf declaration in readpng2.h */ -#include -#include /* only for PvdM background code */ -#include -#ifdef __CYGWIN__ -/* getch replacement. Turns out, we don't really need this, - * but leave it here if we ever enable any of the uses of - * _getch in the main code - */ -#include -#include -#include -int repl_getch( void ) -{ - char ch; - int fd = fileno(stdin); - struct termio old_tty, new_tty; - - ioctl(fd, TCGETA, &old_tty); - new_tty = old_tty; - new_tty.c_lflag &= ~(ICANON | ECHO | ISIG); - ioctl(fd, TCSETA, &new_tty); - fread(&ch, 1, sizeof(ch), stdin); - ioctl(fd, TCSETA, &old_tty); - - return ch; -} -#define _getch repl_getch -#else -#include /* only for _getch() */ -#endif - -/* all for PvdM background code: */ -#ifndef PI -# define PI 3.141592653589793238 -#endif -#define PI_2 (PI*0.5) -#define INV_PI_360 (360.0 / PI) -#define MAX(a,b) (a>b?a:b) -#define MIN(a,b) (a> 8)) >> 8); \ -} - - -#define INBUFSIZE 4096 /* with pseudo-timing on (1 sec delay/block), this - * block size corresponds roughly to a download - * speed 10% faster than theoretical 33.6K maximum - * (assuming 8 data bits, 1 stop bit and no other - * overhead) */ - -/* local prototypes */ -static void rpng2_win_init(void); -static int rpng2_win_create_window(void); -static int rpng2_win_load_bg_image(void); -static void rpng2_win_display_row(ulg row); -static void rpng2_win_finish_display(void); -static void rpng2_win_cleanup(void); -LRESULT CALLBACK rpng2_win_wndproc(HWND, UINT, WPARAM, LPARAM); - - -static char titlebar[1024]; -static char *progname = PROGNAME; -static char *appname = LONGNAME; -static char *filename; -static FILE *infile; - -static mainprog_info rpng2_info; - -static uch inbuf[INBUFSIZE]; -static int incount; - -static int pat = 6; /* must be less than num_bgpat */ -static int bg_image = 0; -static int bgscale = 16; -static ulg bg_rowbytes; -static uch *bg_data; - -static struct rgb_color { - uch r, g, b; -} rgb[] = { - { 0, 0, 0}, /* 0: black */ - {255, 255, 255}, /* 1: white */ - {173, 132, 57}, /* 2: tan */ - { 64, 132, 0}, /* 3: medium green */ - {189, 117, 1}, /* 4: gold */ - {253, 249, 1}, /* 5: yellow */ - { 0, 0, 255}, /* 6: blue */ - { 0, 0, 120}, /* 7: medium blue */ - {255, 0, 255}, /* 8: magenta */ - { 64, 0, 64}, /* 9: dark magenta */ - {255, 0, 0}, /* 10: red */ - { 64, 0, 0}, /* 11: dark red */ - {255, 127, 0}, /* 12: orange */ - {192, 96, 0}, /* 13: darker orange */ - { 24, 60, 0}, /* 14: dark green-yellow */ - { 85, 125, 200} /* 15: ice blue */ -}; -/* not used for now, but should be for error-checking: -static int num_rgb = sizeof(rgb) / sizeof(struct rgb_color); - */ - -/* - This whole struct is a fairly cheesy way to keep the number of - command-line options to a minimum. The radial-waves background - type is a particularly poor fit to the integer elements of the - struct...but a few macros and a little fixed-point math will do - wonders for ya. - - type bits: - F E D C B A 9 8 7 6 5 4 3 2 1 0 - | | | | | - | | +-+-+-- 0 = sharp-edged checkerboard - | | 1 = soft diamonds - | | 2 = radial waves - | | 3-7 = undefined - | +-- gradient #2 inverted? - +-- alternating columns inverted? - */ -static struct background_pattern { - ush type; - int rgb1_max, rgb1_min; /* or bg_freq, bg_gray */ - int rgb2_max, rgb2_min; /* or bg_bsat, bg_brot (both scaled by 10)*/ -} bg[] = { - {0+8, 2,0, 1,15}, /* checkered: tan/black vs. white/ice blue */ - {0+24, 2,0, 1,0}, /* checkered: tan/black vs. white/black */ - {0+8, 4,5, 0,2}, /* checkered: gold/yellow vs. black/tan */ - {0+8, 4,5, 0,6}, /* checkered: gold/yellow vs. black/blue */ - {0, 7,0, 8,9}, /* checkered: deep blue/black vs. magenta */ - {0+8, 13,0, 5,14}, /* checkered: orange/black vs. yellow */ - {0+8, 12,0, 10,11}, /* checkered: orange/black vs. red */ - {1, 7,0, 8,0}, /* diamonds: deep blue/black vs. magenta */ - {1, 12,0, 11,0}, /* diamonds: orange vs. dark red */ - {1, 10,0, 7,0}, /* diamonds: red vs. medium blue */ - {1, 4,0, 5,0}, /* diamonds: gold vs. yellow */ - {1, 3,0, 0,0}, /* diamonds: medium green vs. black */ - {2, 16, 100, 20, 0}, /* radial: ~hard radial color-beams */ - {2, 18, 100, 10, 2}, /* radial: soft, curved radial color-beams */ - {2, 16, 256, 100, 250}, /* radial: very tight spiral */ - {2, 10000, 256, 11, 0} /* radial: dipole-moire' (almost fractal) */ -}; -static int num_bgpat = sizeof(bg) / sizeof(struct background_pattern); - - -/* Windows-specific global variables (could go in struct, but messy...) */ -static ulg wimage_rowbytes; -static uch *dib; -static uch *wimage_data; -static BITMAPINFOHEADER *bmih; - -static HWND global_hwnd; -static HINSTANCE global_hInst; -static int global_showmode; - - - - -int WINAPI WinMain(HINSTANCE hInst, HINSTANCE hPrevInst, PSTR cmd, int showmode) -{ - char *args[1024]; /* arbitrary limit, but should suffice */ - char **argv = args; - char *p, *q, *bgstr = NULL; - int argc = 0; - int rc, alen, flen; - int error = 0; - int timing = FALSE; - int have_bg = FALSE; - double LUT_exponent; /* just the lookup table */ - double CRT_exponent = 2.2; /* just the monitor */ - double default_display_exponent; /* whole display system */ - MSG msg; - - - /* First initialize a few things, just to be sure--memset takes care of - * default background color (black), booleans (FALSE), pointers (NULL), - * etc. */ - - global_hInst = hInst; - global_showmode = showmode; - filename = (char *)NULL; - memset(&rpng2_info, 0, sizeof(mainprog_info)); - -#ifndef __CYGWIN__ - /* Next reenable console output, which normally goes to the bit bucket - * for windowed apps. Closing the console window will terminate the - * app. Thanks to David.Geldreich at realviz.com for supplying the magical - * incantation. */ - - AllocConsole(); - freopen("CONOUT$", "a", stderr); - freopen("CONOUT$", "a", stdout); -#endif - - /* Set the default value for our display-system exponent, i.e., the - * product of the CRT exponent and the exponent corresponding to - * the frame-buffer's lookup table (LUT), if any. This is not an - * exhaustive list of LUT values (e.g., OpenStep has a lot of weird - * ones), but it should cover 99% of the current possibilities. And - * yes, these ifdefs are completely wasted in a Windows program... */ - -#if defined(NeXT) - /* third-party utilities can modify the default LUT exponent */ - LUT_exponent = 1.0 / 2.2; - /* - if (some_next_function_that_returns_gamma(&next_gamma)) - LUT_exponent = 1.0 / next_gamma; - */ -#elif defined(sgi) - LUT_exponent = 1.0 / 1.7; - /* there doesn't seem to be any documented function to - * get the "gamma" value, so we do it the hard way */ - infile = fopen("/etc/config/system.glGammaVal", "r"); - if (infile) { - double sgi_gamma; - - fgets(tmpline, 80, infile); - fclose(infile); - sgi_gamma = atof(tmpline); - if (sgi_gamma > 0.0) - LUT_exponent = 1.0 / sgi_gamma; - } -#elif defined(Macintosh) - LUT_exponent = 1.8 / 2.61; - /* - if (some_mac_function_that_returns_gamma(&mac_gamma)) - LUT_exponent = mac_gamma / 2.61; - */ -#else - LUT_exponent = 1.0; /* assume no LUT: most PCs */ -#endif - - /* the defaults above give 1.0, 1.3, 1.5 and 2.2, respectively: */ - default_display_exponent = LUT_exponent * CRT_exponent; - - - /* If the user has set the SCREEN_GAMMA environment variable as suggested - * (somewhat imprecisely) in the libpng documentation, use that; otherwise - * use the default value we just calculated. Either way, the user may - * override this via a command-line option. */ - - if ((p = getenv("SCREEN_GAMMA")) != NULL) - rpng2_info.display_exponent = atof(p); - else - rpng2_info.display_exponent = default_display_exponent; - - - /* Windows really hates command lines, so we have to set up our own argv. - * Note that we do NOT bother with quoted arguments here, so don't use - * filenames with spaces in 'em! */ - - argv[argc++] = PROGNAME; - p = cmd; - for (;;) { - if (*p == ' ') - while (*++p == ' ') - ; - /* now p points at the first non-space after some spaces */ - if (*p == '\0') - break; /* nothing after the spaces: done */ - argv[argc++] = q = p; - while (*q && *q != ' ') - ++q; - /* now q points at a space or the end of the string */ - if (*q == '\0') - break; /* last argv already terminated; quit */ - *q = '\0'; /* change space to terminator */ - p = q + 1; - } - argv[argc] = NULL; /* terminate the argv array itself */ - - - /* Now parse the command line for options and the PNG filename. */ - - while (*++argv && !error) { - if (!strncmp(*argv, "-gamma", 2)) { - if (!*++argv) - ++error; - else { - rpng2_info.display_exponent = atof(*argv); - if (rpng2_info.display_exponent <= 0.0) - ++error; - } - } else if (!strncmp(*argv, "-bgcolor", 4)) { - if (!*++argv) - ++error; - else { - bgstr = *argv; - if (strlen(bgstr) != 7 || bgstr[0] != '#') - ++error; - else { - have_bg = TRUE; - bg_image = FALSE; - } - } - } else if (!strncmp(*argv, "-bgpat", 4)) { - if (!*++argv) - ++error; - else { - pat = atoi(*argv) - 1; - if (pat < 0 || pat >= num_bgpat) - ++error; - else { - bg_image = TRUE; - have_bg = FALSE; - } - } - } else if (!strncmp(*argv, "-timing", 2)) { - timing = TRUE; - } else { - if (**argv != '-') { - filename = *argv; - if (argv[1]) /* shouldn't be any more args after filename */ - ++error; - } else - ++error; /* not expecting any other options */ - } - } - - if (!filename) - ++error; - - - /* print usage screen if any errors up to this point */ - - if (error) { -#ifndef __CYGWIN__ - int ch; -#endif - - fprintf(stderr, "\n%s %s: %s\n\n", PROGNAME, VERSION, appname); - readpng2_version_info(); - fprintf(stderr, "\n" - "Usage: %s [-gamma exp] [-bgcolor bg | -bgpat pat] [-timing]\n" - " %*s file.png\n\n" - " exp \ttransfer-function exponent (``gamma'') of the display\n" - "\t\t system in floating-point format (e.g., ``%.1f''); equal\n" - "\t\t to the product of the lookup-table exponent (varies)\n" - "\t\t and the CRT exponent (usually 2.2); must be positive\n" - " bg \tdesired background color in 7-character hex RGB format\n" - "\t\t (e.g., ``#ff7700'' for orange: same as HTML colors);\n" - "\t\t used with transparent images; overrides -bgpat option\n" - " pat \tdesired background pattern number (1-%d); used with\n" - "\t\t transparent images; overrides -bgcolor option\n" - " -timing\tenables delay for every block read, to simulate modem\n" - "\t\t download of image (~36 Kbps)\n" - "\nPress Q, Esc or mouse button 1 after image is displayed to quit.\n" -#ifndef __CYGWIN__ - "Press Q or Esc to quit this usage screen. ", -#else - , -#endif - PROGNAME, -#if (defined(__i386__) || defined(_M_IX86) || defined(__x86_64__)) && \ - !(defined(__CYGWIN__) || defined(__MINGW32__)) - (int)strlen(PROGNAME), " ", -#endif - (int)strlen(PROGNAME), " ", default_display_exponent, num_bgpat); - fflush(stderr); -#ifndef __CYGWIN__ - do - ch = _getch(); - while (ch != 'q' && ch != 'Q' && ch != 0x1B); -#endif - exit(1); - } - - - if (!(infile = fopen(filename, "rb"))) { - fprintf(stderr, PROGNAME ": can't open PNG file [%s]\n", filename); - ++error; - } else { - incount = fread(inbuf, 1, INBUFSIZE, infile); - if (incount < 8 || !readpng2_check_sig(inbuf, 8)) { - fprintf(stderr, PROGNAME - ": [%s] is not a PNG file: incorrect signature\n", - filename); - ++error; - } else if ((rc = readpng2_init(&rpng2_info)) != 0) { - switch (rc) { - case 2: - fprintf(stderr, PROGNAME - ": [%s] has bad IHDR (libpng longjmp)\n", filename); - break; - case 4: - fprintf(stderr, PROGNAME ": insufficient memory\n"); - break; - default: - fprintf(stderr, PROGNAME - ": unknown readpng2_init() error\n"); - break; - } - ++error; - } - if (error) - fclose(infile); - } - - - if (error) { -#ifndef __CYGWIN__ - int ch; -#endif - - fprintf(stderr, PROGNAME ": aborting.\n"); -#ifndef __CYGWIN__ - do - ch = _getch(); - while (ch != 'q' && ch != 'Q' && ch != 0x1B); -#endif - exit(2); - } else { - fprintf(stderr, "\n%s %s: %s\n", PROGNAME, VERSION, appname); -#ifndef __CYGWIN__ - fprintf(stderr, - "\n [console window: closing this window will terminate %s]\n\n", - PROGNAME); -#endif - fflush(stderr); - } - - - /* set the title-bar string, but make sure buffer doesn't overflow */ - - alen = strlen(appname); - flen = strlen(filename); - if (alen + flen + 3 > 1023) - sprintf(titlebar, "%s: ...%s", appname, filename+(alen+flen+6-1023)); - else - sprintf(titlebar, "%s: %s", appname, filename); - - - /* set some final rpng2_info variables before entering main data loop */ - - if (have_bg) { - unsigned r, g, b; /* this approach quiets compiler warnings */ - - sscanf(bgstr+1, "%2x%2x%2x", &r, &g, &b); - rpng2_info.bg_red = (uch)r; - rpng2_info.bg_green = (uch)g; - rpng2_info.bg_blue = (uch)b; - } else - rpng2_info.need_bgcolor = TRUE; - - rpng2_info.state = kPreInit; - rpng2_info.mainprog_init = rpng2_win_init; - rpng2_info.mainprog_display_row = rpng2_win_display_row; - rpng2_info.mainprog_finish_display = rpng2_win_finish_display; - - - /* OK, this is the fun part: call readpng2_decode_data() at the start of - * the loop to deal with our first buffer of data (read in above to verify - * that the file is a PNG image), then loop through the file and continue - * calling the same routine to handle each chunk of data. It in turn - * passes the data to libpng, which will invoke one or more of our call- - * backs as decoded data become available. We optionally call Sleep() for - * one second per iteration to simulate downloading the image via an analog - * modem. */ - - for (;;) { - Trace((stderr, "about to call readpng2_decode_data()\n")) - if (readpng2_decode_data(&rpng2_info, inbuf, incount)) - ++error; - Trace((stderr, "done with readpng2_decode_data()\n")) - - if (error || incount != INBUFSIZE || rpng2_info.state == kDone) { - if (rpng2_info.state == kDone) { - Trace((stderr, "done decoding PNG image\n")) - } else if (ferror(infile)) { - fprintf(stderr, PROGNAME - ": error while reading PNG image file\n"); - exit(3); - } else if (feof(infile)) { - fprintf(stderr, PROGNAME ": end of file reached " - "(unexpectedly) while reading PNG image file\n"); - exit(3); - } else /* if (error) */ { - /* will print error message below */ - } - break; - } - - if (timing) - Sleep(1000L); - - incount = fread(inbuf, 1, INBUFSIZE, infile); - } - - - /* clean up PNG stuff and report any decoding errors */ - - fclose(infile); - Trace((stderr, "about to call readpng2_cleanup()\n")) - readpng2_cleanup(&rpng2_info); - - if (error) { - fprintf(stderr, PROGNAME ": libpng error while decoding PNG image\n"); - exit(3); - } - - - /* wait for the user to tell us when to quit */ - - while (GetMessage(&msg, NULL, 0, 0)) { - TranslateMessage(&msg); - DispatchMessage(&msg); - } - - - /* we're done: clean up all image and Windows resources and go away */ - - Trace((stderr, "about to call rpng2_win_cleanup()\n")) - rpng2_win_cleanup(); - - return msg.wParam; -} - - - - - -/* this function is called by readpng2_info_callback() in readpng2.c, which - * in turn is called by libpng after all of the pre-IDAT chunks have been - * read and processed--i.e., we now have enough info to finish initializing */ - -static void rpng2_win_init() -{ - ulg i; - ulg rowbytes = rpng2_info.rowbytes; - - Trace((stderr, "beginning rpng2_win_init()\n")) - Trace((stderr, " rowbytes = %d\n", rpng2_info.rowbytes)) - Trace((stderr, " width = %ld\n", rpng2_info.width)) - Trace((stderr, " height = %ld\n", rpng2_info.height)) - - /* Guard against integer overflow */ - if (rpng2_info.height > ((size_t)(-1))/rowbytes) { - fprintf(stderr, PROGNAME ": image_data buffer would be too large\n", - readpng2_cleanup(&rpng2_info); - return; - } - - rpng2_info.image_data = (uch *)malloc(rowbytes * rpng2_info.height); - if (!rpng2_info.image_data) { - readpng2_cleanup(&rpng2_info); - return; - } - - rpng2_info.row_pointers = (uch **)malloc(rpng2_info.height * sizeof(uch *)); - if (!rpng2_info.row_pointers) { - free(rpng2_info.image_data); - rpng2_info.image_data = NULL; - readpng2_cleanup(&rpng2_info); - return; - } - - for (i = 0; i < rpng2_info.height; ++i) - rpng2_info.row_pointers[i] = rpng2_info.image_data + i*rowbytes; - -/*--------------------------------------------------------------------------- - Do the basic Windows initialization stuff, make the window, and fill it - with the user-specified, file-specified or default background color. - ---------------------------------------------------------------------------*/ - - if (rpng2_win_create_window()) { - readpng2_cleanup(&rpng2_info); - return; - } - - rpng2_info.state = kWindowInit; -} - - - - - -static int rpng2_win_create_window() -{ - uch bg_red = rpng2_info.bg_red; - uch bg_green = rpng2_info.bg_green; - uch bg_blue = rpng2_info.bg_blue; - uch *dest; - int extra_width, extra_height; - ulg i, j; - WNDCLASSEX wndclass; - RECT rect; - - -/*--------------------------------------------------------------------------- - Allocate memory for the display-specific version of the image (round up - to multiple of 4 for Windows DIB). - ---------------------------------------------------------------------------*/ - - wimage_rowbytes = ((3*rpng2_info.width + 3L) >> 2) << 2; - - if (!(dib = (uch *)malloc(sizeof(BITMAPINFOHEADER) + - wimage_rowbytes*rpng2_info.height))) - { - return 4; /* fail */ - } - -/*--------------------------------------------------------------------------- - Initialize the DIB. Negative height means to use top-down BMP ordering - (must be uncompressed, but that's what we want). Bit count of 1, 4 or 8 - implies a colormap of RGBX quads, but 24-bit BMPs just use B,G,R values - directly => wimage_data begins immediately after BMP header. - ---------------------------------------------------------------------------*/ - - memset(dib, 0, sizeof(BITMAPINFOHEADER)); - bmih = (BITMAPINFOHEADER *)dib; - bmih->biSize = sizeof(BITMAPINFOHEADER); - bmih->biWidth = rpng2_info.width; - bmih->biHeight = -((long)rpng2_info.height); - bmih->biPlanes = 1; - bmih->biBitCount = 24; - bmih->biCompression = 0; - wimage_data = dib + sizeof(BITMAPINFOHEADER); - -/*--------------------------------------------------------------------------- - Fill window with the specified background color (default is black), but - defer loading faked "background image" until window is displayed (may be - slow to compute). Data are in BGR order. - ---------------------------------------------------------------------------*/ - - if (bg_image) { /* just fill with black for now */ - memset(wimage_data, 0, wimage_rowbytes*rpng2_info.height); - } else { - for (j = 0; j < rpng2_info.height; ++j) { - dest = wimage_data + j*wimage_rowbytes; - for (i = rpng2_info.width; i > 0; --i) { - *dest++ = bg_blue; - *dest++ = bg_green; - *dest++ = bg_red; - } - } - } - -/*--------------------------------------------------------------------------- - Set the window parameters. - ---------------------------------------------------------------------------*/ - - memset(&wndclass, 0, sizeof(wndclass)); - - wndclass.cbSize = sizeof(wndclass); - wndclass.style = CS_HREDRAW | CS_VREDRAW; - wndclass.lpfnWndProc = rpng2_win_wndproc; - wndclass.hInstance = global_hInst; - wndclass.hIcon = LoadIcon(NULL, IDI_APPLICATION); - wndclass.hCursor = LoadCursor(NULL, IDC_ARROW); - wndclass.hbrBackground = (HBRUSH)GetStockObject(DKGRAY_BRUSH); - wndclass.lpszMenuName = NULL; - wndclass.lpszClassName = progname; - wndclass.hIconSm = LoadIcon(NULL, IDI_APPLICATION); - - RegisterClassEx(&wndclass); - -/*--------------------------------------------------------------------------- - Finally, create the window. - ---------------------------------------------------------------------------*/ - - extra_width = 2*(GetSystemMetrics(SM_CXBORDER) + - GetSystemMetrics(SM_CXDLGFRAME)); - extra_height = 2*(GetSystemMetrics(SM_CYBORDER) + - GetSystemMetrics(SM_CYDLGFRAME)) + - GetSystemMetrics(SM_CYCAPTION); - - global_hwnd = CreateWindow(progname, titlebar, WS_OVERLAPPEDWINDOW, - CW_USEDEFAULT, CW_USEDEFAULT, rpng2_info.width+extra_width, - rpng2_info.height+extra_height, NULL, NULL, global_hInst, NULL); - - ShowWindow(global_hwnd, global_showmode); - UpdateWindow(global_hwnd); - -/*--------------------------------------------------------------------------- - Now compute the background image and display it. If it fails (memory - allocation), revert to a plain background color. - ---------------------------------------------------------------------------*/ - - if (bg_image) { - static const char *msg = "Computing background image..."; - int x, y, len = strlen(msg); - HDC hdc = GetDC(global_hwnd); - TEXTMETRIC tm; - - GetTextMetrics(hdc, &tm); - x = (rpng2_info.width - len*tm.tmAveCharWidth)/2; - y = (rpng2_info.height - tm.tmHeight)/2; - SetBkMode(hdc, TRANSPARENT); - SetTextColor(hdc, GetSysColor(COLOR_HIGHLIGHTTEXT)); - /* this can still begin out of bounds even if x is positive (???): */ - TextOut(hdc, ((x < 0)? 0 : x), ((y < 0)? 0 : y), msg, len); - ReleaseDC(global_hwnd, hdc); - - rpng2_win_load_bg_image(); /* resets bg_image if fails */ - } - - if (!bg_image) { - for (j = 0; j < rpng2_info.height; ++j) { - dest = wimage_data + j*wimage_rowbytes; - for (i = rpng2_info.width; i > 0; --i) { - *dest++ = bg_blue; - *dest++ = bg_green; - *dest++ = bg_red; - } - } - } - - rect.left = 0L; - rect.top = 0L; - rect.right = (LONG)rpng2_info.width; /* possibly off by one? */ - rect.bottom = (LONG)rpng2_info.height; /* possibly off by one? */ - InvalidateRect(global_hwnd, &rect, FALSE); - UpdateWindow(global_hwnd); /* similar to XFlush() */ - - return 0; - -} /* end function rpng2_win_create_window() */ - - - - - -static int rpng2_win_load_bg_image() -{ - uch *src, *dest; - uch r1, r2, g1, g2, b1, b2; - uch r1_inv, r2_inv, g1_inv, g2_inv, b1_inv, b2_inv; - int k, hmax, max; - int xidx, yidx, yidx_max = (bgscale-1); - int even_odd_vert, even_odd_horiz, even_odd; - int invert_gradient2 = (bg[pat].type & 0x08); - int invert_column; - ulg i, row; - -/*--------------------------------------------------------------------------- - Allocate buffer for fake background image to be used with transparent - images; if this fails, revert to plain background color. - ---------------------------------------------------------------------------*/ - - bg_rowbytes = 3 * rpng2_info.width; - bg_data = (uch *)malloc(bg_rowbytes * rpng2_info.height); - if (!bg_data) { - fprintf(stderr, PROGNAME - ": unable to allocate memory for background image\n"); - bg_image = 0; - return 1; - } - -/*--------------------------------------------------------------------------- - Vertical gradients (ramps) in NxN squares, alternating direction and - colors (N == bgscale). - ---------------------------------------------------------------------------*/ - - if ((bg[pat].type & 0x07) == 0) { - uch r1_min = rgb[bg[pat].rgb1_min].r; - uch g1_min = rgb[bg[pat].rgb1_min].g; - uch b1_min = rgb[bg[pat].rgb1_min].b; - uch r2_min = rgb[bg[pat].rgb2_min].r; - uch g2_min = rgb[bg[pat].rgb2_min].g; - uch b2_min = rgb[bg[pat].rgb2_min].b; - int r1_diff = rgb[bg[pat].rgb1_max].r - r1_min; - int g1_diff = rgb[bg[pat].rgb1_max].g - g1_min; - int b1_diff = rgb[bg[pat].rgb1_max].b - b1_min; - int r2_diff = rgb[bg[pat].rgb2_max].r - r2_min; - int g2_diff = rgb[bg[pat].rgb2_max].g - g2_min; - int b2_diff = rgb[bg[pat].rgb2_max].b - b2_min; - - for (row = 0; row < rpng2_info.height; ++row) { - yidx = row % bgscale; - even_odd_vert = (row / bgscale) & 1; - - r1 = r1_min + (r1_diff * yidx) / yidx_max; - g1 = g1_min + (g1_diff * yidx) / yidx_max; - b1 = b1_min + (b1_diff * yidx) / yidx_max; - r1_inv = r1_min + (r1_diff * (yidx_max-yidx)) / yidx_max; - g1_inv = g1_min + (g1_diff * (yidx_max-yidx)) / yidx_max; - b1_inv = b1_min + (b1_diff * (yidx_max-yidx)) / yidx_max; - - r2 = r2_min + (r2_diff * yidx) / yidx_max; - g2 = g2_min + (g2_diff * yidx) / yidx_max; - b2 = b2_min + (b2_diff * yidx) / yidx_max; - r2_inv = r2_min + (r2_diff * (yidx_max-yidx)) / yidx_max; - g2_inv = g2_min + (g2_diff * (yidx_max-yidx)) / yidx_max; - b2_inv = b2_min + (b2_diff * (yidx_max-yidx)) / yidx_max; - - dest = bg_data + row*bg_rowbytes; - for (i = 0; i < rpng2_info.width; ++i) { - even_odd_horiz = (i / bgscale) & 1; - even_odd = even_odd_vert ^ even_odd_horiz; - invert_column = - (even_odd_horiz && (bg[pat].type & 0x10)); - if (even_odd == 0) { /* gradient #1 */ - if (invert_column) { - *dest++ = r1_inv; - *dest++ = g1_inv; - *dest++ = b1_inv; - } else { - *dest++ = r1; - *dest++ = g1; - *dest++ = b1; - } - } else { /* gradient #2 */ - if ((invert_column && invert_gradient2) || - (!invert_column && !invert_gradient2)) - { - *dest++ = r2; /* not inverted or */ - *dest++ = g2; /* doubly inverted */ - *dest++ = b2; - } else { - *dest++ = r2_inv; - *dest++ = g2_inv; /* singly inverted */ - *dest++ = b2_inv; - } - } - } - } - -/*--------------------------------------------------------------------------- - Soft gradient-diamonds with scale = bgscale. Code contributed by Adam - M. Costello. - ---------------------------------------------------------------------------*/ - - } else if ((bg[pat].type & 0x07) == 1) { - - hmax = (bgscale-1)/2; /* half the max weight of a color */ - max = 2*hmax; /* the max weight of a color */ - - r1 = rgb[bg[pat].rgb1_max].r; - g1 = rgb[bg[pat].rgb1_max].g; - b1 = rgb[bg[pat].rgb1_max].b; - r2 = rgb[bg[pat].rgb2_max].r; - g2 = rgb[bg[pat].rgb2_max].g; - b2 = rgb[bg[pat].rgb2_max].b; - - for (row = 0; row < rpng2_info.height; ++row) { - yidx = row % bgscale; - if (yidx > hmax) - yidx = bgscale-1 - yidx; - dest = bg_data + row*bg_rowbytes; - for (i = 0; i < rpng2_info.width; ++i) { - xidx = i % bgscale; - if (xidx > hmax) - xidx = bgscale-1 - xidx; - k = xidx + yidx; - *dest++ = (k*r1 + (max-k)*r2) / max; - *dest++ = (k*g1 + (max-k)*g2) / max; - *dest++ = (k*b1 + (max-k)*b2) / max; - } - } - -/*--------------------------------------------------------------------------- - Radial "starburst" with azimuthal sinusoids; [eventually number of sinu- - soids will equal bgscale?]. This one is slow but very cool. Code con- - tributed by Pieter S. van der Meulen (originally in Smalltalk). - ---------------------------------------------------------------------------*/ - - } else if ((bg[pat].type & 0x07) == 2) { - uch ch; - int ii, x, y, hw, hh, grayspot; - double freq, rotate, saturate, gray, intensity; - double angle=0.0, aoffset=0.0, maxDist, dist; - double red=0.0, green=0.0, blue=0.0, hue, s, v, f, p, q, t; - - fprintf(stderr, "%s: computing radial background...", - PROGNAME); - fflush(stderr); - - hh = rpng2_info.height / 2; - hw = rpng2_info.width / 2; - - /* variables for radial waves: - * aoffset: number of degrees to rotate hue [CURRENTLY NOT USED] - * freq: number of color beams originating from the center - * grayspot: size of the graying center area (anti-alias) - * rotate: rotation of the beams as a function of radius - * saturate: saturation of beams' shape azimuthally - */ - angle = CLIP(angle, 0.0, 360.0); - grayspot = CLIP(bg[pat].bg_gray, 1, (hh + hw)); - freq = MAX((double)bg[pat].bg_freq, 0.0); - saturate = (double)bg[pat].bg_bsat * 0.1; - rotate = (double)bg[pat].bg_brot * 0.1; - gray = 0.0; - intensity = 0.0; - maxDist = (double)((hw*hw) + (hh*hh)); - - for (row = 0; row < rpng2_info.height; ++row) { - y = row - hh; - dest = bg_data + row*bg_rowbytes; - for (i = 0; i < rpng2_info.width; ++i) { - x = i - hw; - angle = (x == 0)? PI_2 : atan((double)y / (double)x); - gray = (double)MAX(ABS(y), ABS(x)) / grayspot; - gray = MIN(1.0, gray); - dist = (double)((x*x) + (y*y)) / maxDist; - intensity = cos((angle+(rotate*dist*PI)) * freq) * - gray * saturate; - intensity = (MAX(MIN(intensity,1.0),-1.0) + 1.0) * 0.5; - hue = (angle + PI) * INV_PI_360 + aoffset; - s = gray * ((double)(ABS(x)+ABS(y)) / (double)(hw + hh)); - s = MIN(MAX(s,0.0), 1.0); - v = MIN(MAX(intensity,0.0), 1.0); - - if (s == 0.0) { - ch = (uch)(v * 255.0); - *dest++ = ch; - *dest++ = ch; - *dest++ = ch; - } else { - if ((hue < 0.0) || (hue >= 360.0)) - hue -= (((int)(hue / 360.0)) * 360.0); - hue /= 60.0; - ii = (int)hue; - f = hue - (double)ii; - p = (1.0 - s) * v; - q = (1.0 - (s * f)) * v; - t = (1.0 - (s * (1.0 - f))) * v; - if (ii == 0) { red = v; green = t; blue = p; } - else if (ii == 1) { red = q; green = v; blue = p; } - else if (ii == 2) { red = p; green = v; blue = t; } - else if (ii == 3) { red = p; green = q; blue = v; } - else if (ii == 4) { red = t; green = p; blue = v; } - else if (ii == 5) { red = v; green = p; blue = q; } - *dest++ = (uch)(red * 255.0); - *dest++ = (uch)(green * 255.0); - *dest++ = (uch)(blue * 255.0); - } - } - } - fprintf(stderr, "done.\n"); - fflush(stderr); - } - -/*--------------------------------------------------------------------------- - Blast background image to display buffer before beginning PNG decode; - calling function will handle invalidation and UpdateWindow() call. - ---------------------------------------------------------------------------*/ - - for (row = 0; row < rpng2_info.height; ++row) { - src = bg_data + row*bg_rowbytes; - dest = wimage_data + row*wimage_rowbytes; - for (i = rpng2_info.width; i > 0; --i) { - r1 = *src++; - g1 = *src++; - b1 = *src++; - *dest++ = b1; - *dest++ = g1; /* note reverse order */ - *dest++ = r1; - } - } - - return 0; - -} /* end function rpng2_win_load_bg_image() */ - - - - - -static void rpng2_win_display_row(ulg row) -{ - uch bg_red = rpng2_info.bg_red; - uch bg_green = rpng2_info.bg_green; - uch bg_blue = rpng2_info.bg_blue; - uch *src, *src2=NULL, *dest; - uch r, g, b, a; - ulg i; - static int rows=0; - static ulg firstrow; - -/*--------------------------------------------------------------------------- - rows and firstrow simply track how many rows (and which ones) have not - yet been displayed; alternatively, we could call InvalidateRect() for - every row and not bother with the records-keeping. - ---------------------------------------------------------------------------*/ - - Trace((stderr, "beginning rpng2_win_display_row()\n")) - - if (rows == 0) - firstrow = row; /* first row not yet displayed */ - - ++rows; /* count of rows received but not yet displayed */ - -/*--------------------------------------------------------------------------- - Aside from the use of the rpng2_info struct and the lack of an outer - loop (over rows), this routine is identical to rpng_win_display_image() - in the non-progressive version of the program. - ---------------------------------------------------------------------------*/ - - src = rpng2_info.image_data + row*rpng2_info.rowbytes; - if (bg_image) - src2 = bg_data + row*bg_rowbytes; - dest = wimage_data + row*wimage_rowbytes; - - if (rpng2_info.channels == 3) { - for (i = rpng2_info.width; i > 0; --i) { - r = *src++; - g = *src++; - b = *src++; - *dest++ = b; - *dest++ = g; /* note reverse order */ - *dest++ = r; - } - } else /* if (rpng2_info.channels == 4) */ { - for (i = rpng2_info.width; i > 0; --i) { - r = *src++; - g = *src++; - b = *src++; - a = *src++; - if (bg_image) { - bg_red = *src2++; - bg_green = *src2++; - bg_blue = *src2++; - } - if (a == 255) { - *dest++ = b; - *dest++ = g; - *dest++ = r; - } else if (a == 0) { - *dest++ = bg_blue; - *dest++ = bg_green; - *dest++ = bg_red; - } else { - /* this macro (copied from png.h) composites the - * foreground and background values and puts the - * result into the first argument; there are no - * side effects with the first argument */ - alpha_composite(*dest++, b, a, bg_blue); - alpha_composite(*dest++, g, a, bg_green); - alpha_composite(*dest++, r, a, bg_red); - } - } - } - -/*--------------------------------------------------------------------------- - Display after every 16 rows or when on last row. (Region may include - previously displayed lines due to interlacing--i.e., not contiguous.) - ---------------------------------------------------------------------------*/ - - if ((rows & 0xf) == 0 || row == rpng2_info.height-1) { - RECT rect; - - rect.left = 0L; - rect.top = (LONG)firstrow; - rect.right = (LONG)rpng2_info.width; /* possibly off by one? */ - rect.bottom = (LONG)row + 1L; /* possibly off by one? */ - InvalidateRect(global_hwnd, &rect, FALSE); - UpdateWindow(global_hwnd); /* similar to XFlush() */ - rows = 0; - } - -} /* end function rpng2_win_display_row() */ - - - - - -static void rpng2_win_finish_display() -{ - Trace((stderr, "beginning rpng2_win_finish_display()\n")) - - /* last row has already been displayed by rpng2_win_display_row(), so - * we have nothing to do here except set a flag and let the user know - * that the image is done */ - - rpng2_info.state = kDone; - printf( -#ifndef __CYGWIN__ - "Done. Press Q, Esc or mouse button 1 (within image window) to quit.\n" -#else - "Done. Press mouse button 1 (within image window) to quit.\n" -#endif - ); - fflush(stdout); -} - - - - - -static void rpng2_win_cleanup() -{ - if (bg_image && bg_data) { - free(bg_data); - bg_data = NULL; - } - - if (rpng2_info.image_data) { - free(rpng2_info.image_data); - rpng2_info.image_data = NULL; - } - - if (rpng2_info.row_pointers) { - free(rpng2_info.row_pointers); - rpng2_info.row_pointers = NULL; - } - - if (dib) { - free(dib); - dib = NULL; - } -} - - - - - -LRESULT CALLBACK rpng2_win_wndproc(HWND hwnd, UINT iMsg, WPARAM wP, LPARAM lP) -{ - HDC hdc; - PAINTSTRUCT ps; - int rc; - - switch (iMsg) { - case WM_CREATE: - /* one-time processing here, if any */ - return 0; - - case WM_PAINT: - hdc = BeginPaint(hwnd, &ps); - rc = StretchDIBits(hdc, 0, 0, rpng2_info.width, rpng2_info.height, - 0, 0, rpng2_info.width, rpng2_info.height, - wimage_data, (BITMAPINFO *)bmih, - 0, SRCCOPY); - EndPaint(hwnd, &ps); - return 0; - - /* wait for the user to tell us when to quit */ - case WM_CHAR: - switch (wP) { /* only need one, so ignore repeat count */ - case 'q': - case 'Q': - case 0x1B: /* Esc key */ - PostQuitMessage(0); - } - return 0; - - case WM_LBUTTONDOWN: /* another way of quitting */ - case WM_DESTROY: - PostQuitMessage(0); - return 0; - } - - return DefWindowProc(hwnd, iMsg, wP, lP); -} diff --git a/lib/libpng-1.6.37/contrib/gregbook/rpng2-x.c b/lib/libpng-1.6.37/contrib/gregbook/rpng2-x.c deleted file mode 100644 index af944c0..0000000 --- a/lib/libpng-1.6.37/contrib/gregbook/rpng2-x.c +++ /dev/null @@ -1,2143 +0,0 @@ -/*--------------------------------------------------------------------------- - - rpng2 - progressive-model PNG display program rpng2-x.c - - This program decodes and displays PNG files progressively, as if it were - a web browser (though the front end is only set up to read from files). - It supports gamma correction, user-specified background colors, and user- - specified background patterns (for transparent images). This version is - for the X Window System (tested by the author under Unix and by Martin - Zinser under OpenVMS; may work under OS/2 with a little tweaking). - - Thanks to Adam Costello and Pieter S. van der Meulen for the "diamond" - and "radial waves" patterns, respectively. - - to do (someday, maybe): - - fix expose/redraw code: don't draw entire row if only part exposed - - 8-bit (colormapped) X support - - finish resizable checkerboard-gradient (sizes 4-128?) - - use %.1023s to simplify truncation of title-bar string? - - --------------------------------------------------------------------------- - - Changelog: - - 1.01: initial public release - - 1.02: modified to allow abbreviated options; fixed char/uchar mismatch - - 1.10: added support for non-default visuals; fixed X pixel-conversion - - 1.11: added -usleep option for demos; fixed command-line parsing bug - - 1.12: added -pause option for demos and testing - - 1.20: added runtime MMX-enabling/disabling and new -mmx* options - - 1.21: fixed some small X memory leaks (thanks to Franois Petitjean) - - 1.22: fixed XFreeGC() crash bug (thanks to Patrick Welche) - - 1.23: added -bgpat 0 mode (std white/gray checkerboard, 8x8 squares) - - 1.30: added -loop option for -bgpat (ifdef FEATURE_LOOP); fixed bpp = - 24; added support for X resources (thanks to Gerhard Niklasch) - - 1.31: added code to skip unused chunks (thanks to Glenn Randers-Pehrson) - - 1.32: added AMD64/EM64T support (__x86_64__); added basic expose/redraw - handling - - 2.00: dual-licensed (added GNU GPL) - - 2.01: fixed 64-bit typo in readpng2.c; fixed -pause usage description - - 2.02: fixed improper display of usage screen on PNG error(s); fixed - unexpected-EOF and file-read-error cases; fixed Trace() cut-and- - paste bugs - - 2.03: deleted runtime MMX-enabling/disabling and obsolete -mmx* options - - 2.04: Added "void(foo);" statements to quiet pedantic compiler warnings - about unused variables (GR-P) - - 2.05: Use nanosleep() instead of usleep(), which is deprecated (GR-P). - - 2.06: check for integer overflow (Glenn R-P) - --------------------------------------------------------------------------- - - Copyright (c) 1998-2010, 2014-2015, 2017 Greg Roelofs. All rights - reserved. - - This software is provided "as is," without warranty of any kind, - express or implied. In no event shall the author or contributors - be held liable for any damages arising in any way from the use of - this software. - - The contents of this file are DUAL-LICENSED. You may modify and/or - redistribute this software according to the terms of one of the - following two licenses (at your option): - - - LICENSE 1 ("BSD-like with advertising clause"): - - Permission is granted to anyone to use this software for any purpose, - including commercial applications, and to alter it and redistribute - it freely, subject to the following restrictions: - - 1. Redistributions of source code must retain the above copyright - notice, disclaimer, and this list of conditions. - 2. Redistributions in binary form must reproduce the above copyright - notice, disclaimer, and this list of conditions in the documenta- - tion and/or other materials provided with the distribution. - 3. All advertising materials mentioning features or use of this - software must display the following acknowledgment: - - This product includes software developed by Greg Roelofs - and contributors for the book, "PNG: The Definitive Guide," - published by O'Reilly and Associates. - - - LICENSE 2 (GNU GPL v2 or later): - - This program is free software; you can redistribute it and/or modify - it under the terms of the GNU General Public License as published by - the Free Software Foundation; either version 2 of the License, or - (at your option) any later version. - - This program is distributed in the hope that it will be useful, - but WITHOUT ANY WARRANTY; without even the implied warranty of - MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - GNU General Public License for more details. - - You should have received a copy of the GNU General Public License - along with this program; if not, write to the Free Software Foundation, - Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA - - ---------------------------------------------------------------------------*/ - -#define PROGNAME "rpng2-x" -#define LONGNAME "Progressive PNG Viewer for X" -#define VERSION "2.04 of 15 June 2014" -#define RESNAME "rpng2" /* our X resource application name */ -#define RESCLASS "Rpng" /* our X resource class name */ - -#include -#include -#include -#include -#include /* for jmpbuf declaration in readpng2.h */ -#include -#include /* only for PvdM background code */ -#include -#include -#include -#include /* defines XK_* macros */ - -#if _POSIX_C_SOURCE >= 199309L /* have nanosleep() */ -# undef usleep -# define usleep(usec) { \ - struct timespec ts; \ - ts.tv_sec = 0; \ - ts.tv_nsec = (usec) * 1000; \ - nanosleep(&ts, NULL); } -# endif - -#ifndef usleep /* have neither nanosleep() nor usleep() */ -# define usleep(x) sleep(((x)+499999)/1000000) -#endif - -#ifdef VMS -# include -#endif - -/* all for PvdM background code: */ -#ifndef PI -# define PI 3.141592653589793238 -#endif -#define PI_2 (PI*0.5) -#define INV_PI_360 (360.0 / PI) -#define MAX(a,b) (a>b?a:b) -#define MIN(a,b) (a> 8)) >> 8); \ -} - - -#define INBUFSIZE 4096 /* with pseudo-timing on (1 sec delay/block), this - * block size corresponds roughly to a download - * speed 10% faster than theoretical 33.6K maximum - * (assuming 8 data bits, 1 stop bit and no other - * overhead) */ - -/* local prototypes */ -static void rpng2_x_init (void); -static int rpng2_x_create_window (void); -static int rpng2_x_load_bg_image (void); -static void rpng2_x_display_row (ulg row); -static void rpng2_x_finish_display (void); -static void rpng2_x_redisplay_image (ulg startcol, ulg startrow, - ulg width, ulg height); -#ifdef FEATURE_LOOP -static void rpng2_x_reload_bg_image (void); -static int is_number (char *p); -#endif -static void rpng2_x_cleanup (void); -static int rpng2_x_msb (ulg u32val); - - -static char titlebar[1024], *window_name = titlebar; -static char *appname = LONGNAME; -static char *icon_name = PROGNAME; -static char *res_name = RESNAME; -static char *res_class = RESCLASS; -static char *filename; -static FILE *infile; - -static mainprog_info rpng2_info; - -static uch inbuf[INBUFSIZE]; -static int incount; - -static int pat = 6; /* must be less than num_bgpat */ -static int bg_image = 0; -static int bgscale, bgscale_default = 16; -static ulg bg_rowbytes; -static uch *bg_data; - -int pause_after_pass = FALSE; -int demo_timing = FALSE; -ulg usleep_duration = 0L; - -static struct rgb_color { - uch r, g, b; -} rgb[] = { - { 0, 0, 0}, /* 0: black */ - {255, 255, 255}, /* 1: white */ - {173, 132, 57}, /* 2: tan */ - { 64, 132, 0}, /* 3: medium green */ - {189, 117, 1}, /* 4: gold */ - {253, 249, 1}, /* 5: yellow */ - { 0, 0, 255}, /* 6: blue */ - { 0, 0, 120}, /* 7: medium blue */ - {255, 0, 255}, /* 8: magenta */ - { 64, 0, 64}, /* 9: dark magenta */ - {255, 0, 0}, /* 10: red */ - { 64, 0, 0}, /* 11: dark red */ - {255, 127, 0}, /* 12: orange */ - {192, 96, 0}, /* 13: darker orange */ - { 24, 60, 0}, /* 14: dark green-yellow */ - { 85, 125, 200}, /* 15: ice blue */ - {192, 192, 192} /* 16: Netscape/Mosaic gray */ -}; -/* not used for now, but should be for error-checking: -static int num_rgb = sizeof(rgb) / sizeof(struct rgb_color); - */ - -/* - This whole struct is a fairly cheesy way to keep the number of - command-line options to a minimum. The radial-waves background - type is a particularly poor fit to the integer elements of the - struct...but a few macros and a little fixed-point math will do - wonders for ya. - - type bits: - F E D C B A 9 8 7 6 5 4 3 2 1 0 - | | | | | - | | +-+-+-- 0 = sharp-edged checkerboard - | | 1 = soft diamonds - | | 2 = radial waves - | | 3-7 = undefined - | +-- gradient #2 inverted? - +-- alternating columns inverted? - */ -static struct background_pattern { - ush type; - int rgb1_max, rgb1_min; /* or bg_freq, bg_gray */ - int rgb2_max, rgb2_min; /* or bg_bsat, bg_brot (both scaled by 10)*/ -} bg[] = { - {0, 1,1, 16,16}, /* checkered: white vs. light gray (basic) */ - {0+8, 2,0, 1,15}, /* checkered: tan/black vs. white/ice blue */ - {0+24, 2,0, 1,0}, /* checkered: tan/black vs. white/black */ - {0+8, 4,5, 0,2}, /* checkered: gold/yellow vs. black/tan */ - {0+8, 4,5, 0,6}, /* checkered: gold/yellow vs. black/blue */ - {0, 7,0, 8,9}, /* checkered: deep blue/black vs. magenta */ - {0+8, 13,0, 5,14}, /* checkered: orange/black vs. yellow */ - {0+8, 12,0, 10,11}, /* checkered: orange/black vs. red */ - {1, 7,0, 8,0}, /* diamonds: deep blue/black vs. magenta */ - {1, 12,0, 11,0}, /* diamonds: orange vs. dark red */ - {1, 10,0, 7,0}, /* diamonds: red vs. medium blue */ - {1, 4,0, 5,0}, /* diamonds: gold vs. yellow */ - {1, 3,0, 0,0}, /* diamonds: medium green vs. black */ - {2, 16, 100, 20, 0}, /* radial: ~hard radial color-beams */ - {2, 18, 100, 10, 2}, /* radial: soft, curved radial color-beams */ - {2, 16, 256, 100, 250}, /* radial: very tight spiral */ - {2, 10000, 256, 11, 0} /* radial: dipole-moire' (almost fractal) */ -}; -static int num_bgpat = sizeof(bg) / sizeof(struct background_pattern); - - -/* X-specific variables */ -static char *displayname; -static XImage *ximage; -static Display *display; -static int depth; -static Visual *visual; -static XVisualInfo *visual_list; -static int RShift, GShift, BShift; -static ulg RMask, GMask, BMask; -static Window window; -static GC gc; -static Colormap colormap; - -static int have_nondefault_visual = FALSE; -static int have_colormap = FALSE; -static int have_window = FALSE; -static int have_gc = FALSE; - - - - -int main(int argc, char **argv) -{ -#ifdef sgi - char tmpline[80]; -#endif - char *p, *bgstr = NULL; - int rc, alen, flen; - int error = 0; - int timing = FALSE; - int have_bg = FALSE; -#ifdef FEATURE_LOOP - int loop = FALSE; - long loop_interval = -1; /* seconds (100,000 max) */ -#endif - double LUT_exponent; /* just the lookup table */ - double CRT_exponent = 2.2; /* just the monitor */ - double default_display_exponent; /* whole display system */ - XEvent e; - KeySym k; - - - /* First initialize a few things, just to be sure--memset takes care of - * default background color (black), booleans (FALSE), pointers (NULL), - * etc. */ - - displayname = (char *)NULL; - filename = (char *)NULL; - memset(&rpng2_info, 0, sizeof(mainprog_info)); - - - /* Set the default value for our display-system exponent, i.e., the - * product of the CRT exponent and the exponent corresponding to - * the frame-buffer's lookup table (LUT), if any. This is not an - * exhaustive list of LUT values (e.g., OpenStep has a lot of weird - * ones), but it should cover 99% of the current possibilities. */ - -#if defined(NeXT) - /* third-party utilities can modify the default LUT exponent */ - LUT_exponent = 1.0 / 2.2; - /* - if (some_next_function_that_returns_gamma(&next_gamma)) - LUT_exponent = 1.0 / next_gamma; - */ -#elif defined(sgi) - LUT_exponent = 1.0 / 1.7; - /* there doesn't seem to be any documented function to - * get the "gamma" value, so we do it the hard way */ - infile = fopen("/etc/config/system.glGammaVal", "r"); - if (infile) { - double sgi_gamma; - - fgets(tmpline, 80, infile); - fclose(infile); - sgi_gamma = atof(tmpline); - if (sgi_gamma > 0.0) - LUT_exponent = 1.0 / sgi_gamma; - } -#elif defined(Macintosh) - LUT_exponent = 1.8 / 2.61; - /* - if (some_mac_function_that_returns_gamma(&mac_gamma)) - LUT_exponent = mac_gamma / 2.61; - */ -#else - LUT_exponent = 1.0; /* assume no LUT: most PCs */ -#endif - - /* the defaults above give 1.0, 1.3, 1.5 and 2.2, respectively: */ - default_display_exponent = LUT_exponent * CRT_exponent; - - - /* If the user has set the SCREEN_GAMMA environment variable as suggested - * (somewhat imprecisely) in the libpng documentation, use that; otherwise - * use the default value we just calculated. Either way, the user may - * override this via a command-line option. */ - - if ((p = getenv("SCREEN_GAMMA")) != NULL) - rpng2_info.display_exponent = atof(p); - else - rpng2_info.display_exponent = default_display_exponent; - - - /* Now parse the command line for options and the PNG filename. */ - - while (*++argv && !error) { - if (!strncmp(*argv, "-display", 2)) { - if (!*++argv) - ++error; - else - displayname = *argv; - } else if (!strncmp(*argv, "-gamma", 2)) { - if (!*++argv) - ++error; - else { - rpng2_info.display_exponent = atof(*argv); - if (rpng2_info.display_exponent <= 0.0) - ++error; - } - } else if (!strncmp(*argv, "-bgcolor", 4)) { - if (!*++argv) - ++error; - else { - bgstr = *argv; - if (strlen(bgstr) != 7 || bgstr[0] != '#') - ++error; - else { - have_bg = TRUE; - bg_image = FALSE; - } - } - } else if (!strncmp(*argv, "-bgpat", 4)) { - if (!*++argv) - ++error; - else { - pat = atoi(*argv); - if (pat >= 0 && pat < num_bgpat) { - bg_image = TRUE; - have_bg = FALSE; - } else - ++error; - } - } else if (!strncmp(*argv, "-usleep", 2)) { - if (!*++argv) - ++error; - else { - usleep_duration = (ulg)atol(*argv); - demo_timing = TRUE; - } - } else if (!strncmp(*argv, "-pause", 2)) { - pause_after_pass = TRUE; - } else if (!strncmp(*argv, "-timing", 2)) { - timing = TRUE; -#ifdef FEATURE_LOOP - } else if (!strncmp(*argv, "-loop", 2)) { - loop = TRUE; - if (!argv[1] || !is_number(argv[1])) - loop_interval = 2; - else { - ++argv; - loop_interval = atol(*argv); - if (loop_interval < 0) - loop_interval = 2; - else if (loop_interval > 100000) /* bit more than one day */ - loop_interval = 100000; - } -#endif - } else { - if (**argv != '-') { - filename = *argv; - if (argv[1]) /* shouldn't be any more args after filename */ - ++error; - } else - ++error; /* not expecting any other options */ - } - } - - if (!filename) - ++error; - - - /* print usage screen if any errors up to this point */ - - if (error) { - fprintf(stderr, "\n%s %s: %s\n\n", PROGNAME, VERSION, appname); - readpng2_version_info(); - fprintf(stderr, "\n" - "Usage: "); - fprintf(stderr, - "%s [-display xdpy] [-gamma exp] [-bgcolor bg | -bgpat pat]\n" - " %*s [-usleep dur | -timing] [-pause]\n", - PROGNAME, (int)strlen(PROGNAME), " "); - fprintf(stderr, -#ifdef FEATURE_LOOP - " [-loop [sec]]" -#endif - " file.png\n\n"); - fprintf(stderr, - " xdpy\tname of the target X display (e.g., ``hostname:0'')\n" - " exp \ttransfer-function exponent (``gamma'') of the display\n" - "\t\t system in floating-point format (e.g., ``%.1f''); equal\n" - "\t\t to the product of the lookup-table exponent (varies)\n", - default_display_exponent); - fprintf(stderr, - "\t\t and the CRT exponent (usually 2.2); must be positive\n" - " bg \tdesired background color in 7-character hex RGB format\n" - "\t\t (e.g., ``#ff7700'' for orange: same as HTML colors);\n" - "\t\t used with transparent images; overrides -bgpat\n" - " pat \tdesired background pattern number (0-%d); used with\n" - "\t\t transparent images; overrides -bgcolor\n", - num_bgpat-1); -#ifdef FEATURE_LOOP - fprintf(stderr, - " -loop\tloops through background images after initial display\n" - "\t\t is complete (depends on -bgpat)\n" - " sec \tseconds to display each background image (default = 2)\n"); -#endif - fprintf(stderr, - " dur \tduration in microseconds to wait after displaying each\n" - "\t\t row (for demo purposes)\n" - " -timing\tenables delay for every block read, to simulate modem\n" - "\t\t download of image (~36 Kbps)\n" - " -pause\tpauses after displaying each pass until mouse clicked\n" - "\nPress Q, Esc or mouse button 1 (within image window, after image\n" - "is displayed) to quit.\n"); - exit(1); - } - - if (!(infile = fopen(filename, "rb"))) { - fprintf(stderr, PROGNAME ": can't open PNG file [%s]\n", filename); - ++error; - } else { - incount = fread(inbuf, 1, INBUFSIZE, infile); - if (incount < 8 || !readpng2_check_sig(inbuf, 8)) { - fprintf(stderr, PROGNAME - ": [%s] is not a PNG file: incorrect signature\n", - filename); - ++error; - } else if ((rc = readpng2_init(&rpng2_info)) != 0) { - switch (rc) { - case 2: - fprintf(stderr, PROGNAME - ": [%s] has bad IHDR (libpng longjmp)\n", filename); - break; - case 4: - fprintf(stderr, PROGNAME ": insufficient memory\n"); - break; - default: - fprintf(stderr, PROGNAME - ": unknown readpng2_init() error\n"); - break; - } - ++error; - } else { - Trace((stderr, "about to call XOpenDisplay()\n")) - display = XOpenDisplay(displayname); - if (!display) { - readpng2_cleanup(&rpng2_info); - fprintf(stderr, PROGNAME ": can't open X display [%s]\n", - displayname? displayname : "default"); - ++error; - } - } - if (error) - fclose(infile); - } - - - if (error) { - fprintf(stderr, PROGNAME ": aborting.\n"); - exit(2); - } - - - /* set the title-bar string, but make sure buffer doesn't overflow */ - - alen = strlen(appname); - flen = strlen(filename); - if (alen + flen + 3 > 1023) - sprintf(titlebar, "%s: ...%s", appname, filename+(alen+flen+6-1023)); - else - sprintf(titlebar, "%s: %s", appname, filename); - - - /* set some final rpng2_info variables before entering main data loop */ - - if (have_bg) { - unsigned r, g, b; /* this approach quiets compiler warnings */ - - sscanf(bgstr+1, "%2x%2x%2x", &r, &g, &b); - rpng2_info.bg_red = (uch)r; - rpng2_info.bg_green = (uch)g; - rpng2_info.bg_blue = (uch)b; - } else - rpng2_info.need_bgcolor = TRUE; - - rpng2_info.state = kPreInit; - rpng2_info.mainprog_init = rpng2_x_init; - rpng2_info.mainprog_display_row = rpng2_x_display_row; - rpng2_info.mainprog_finish_display = rpng2_x_finish_display; - - - /* OK, this is the fun part: call readpng2_decode_data() at the start of - * the loop to deal with our first buffer of data (read in above to verify - * that the file is a PNG image), then loop through the file and continue - * calling the same routine to handle each chunk of data. It in turn - * passes the data to libpng, which will invoke one or more of our call- - * backs as decoded data become available. We optionally call sleep() for - * one second per iteration to simulate downloading the image via an analog - * modem. */ - - for (;;) { - Trace((stderr, "about to call readpng2_decode_data()\n")) - if (readpng2_decode_data(&rpng2_info, inbuf, incount)) - ++error; - Trace((stderr, "done with readpng2_decode_data()\n")) - - if (error || incount != INBUFSIZE || rpng2_info.state == kDone) { - if (rpng2_info.state == kDone) { - Trace((stderr, "done decoding PNG image\n")) - } else if (ferror(infile)) { - fprintf(stderr, PROGNAME - ": error while reading PNG image file\n"); - exit(3); - } else if (feof(infile)) { - fprintf(stderr, PROGNAME ": end of file reached " - "(unexpectedly) while reading PNG image file\n"); - exit(3); - } else /* if (error) */ { - /* will print error message below */ - } - break; - } - - if (timing) - sleep(1); - - incount = fread(inbuf, 1, INBUFSIZE, infile); - } - - - /* clean up PNG stuff and report any decoding errors */ - - fclose(infile); - Trace((stderr, "about to call readpng2_cleanup()\n")) - readpng2_cleanup(&rpng2_info); - - if (error) { - fprintf(stderr, PROGNAME ": libpng error while decoding PNG image\n"); - exit(3); - } - - -#ifdef FEATURE_LOOP - - if (loop && bg_image) { - Trace((stderr, "entering -loop loop (FEATURE_LOOP)\n")) - for (;;) { - int i, use_sleep; - struct timeval now, then; - - /* get current time and add loop_interval to get target time */ - if (gettimeofday(&then, NULL) == 0) { - then.tv_sec += loop_interval; - use_sleep = FALSE; - } else - use_sleep = TRUE; - - /* do quick check for a quit event but don't wait for it */ - /* GRR BUG: should also check for Expose events and redraw... */ - if (XCheckMaskEvent(display, KeyPressMask | ButtonPressMask, &e)) - if (QUIT(e,k)) - break; - - /* generate next background image */ - if (++pat >= num_bgpat) - pat = 0; - rpng2_x_reload_bg_image(); - - /* wait for timeout, using whatever means are available */ - if (use_sleep || gettimeofday(&now, NULL) != 0) { - for (i = loop_interval; i > 0; --i) { - sleep(1); - /* GRR BUG: also need to check for Expose (and redraw!) */ - if (XCheckMaskEvent(display, KeyPressMask | ButtonPressMask, - &e) && QUIT(e,k)) - break; - } - } else { - /* Y2038 BUG! */ - if (now.tv_sec < then.tv_sec || - (now.tv_sec == then.tv_sec && now.tv_usec < then.tv_usec)) - { - int quit = FALSE; - long seconds_to_go = then.tv_sec - now.tv_sec; - long usleep_usec; - - /* basically chew up most of remaining loop-interval with - * calls to sleep(1) interleaved with checks for quit - * events, but also recalc time-to-go periodically; when - * done, clean up any remaining time with usleep() call - * (could also use SIGALRM, but signals are a pain...) */ - while (seconds_to_go-- > 1) { - int seconds_done = 0; - - for (i = seconds_to_go; i > 0 && !quit; --i) { - sleep(1); - /* GRR BUG: need to check for Expose and redraw */ - if (XCheckMaskEvent(display, KeyPressMask | - ButtonPressMask, &e) && QUIT(e,k)) - quit = TRUE; - if (++seconds_done > 1000) - break; /* time to redo seconds_to_go meas. */ - } - if (quit) - break; - - /* OK, more than 1000 seconds since last check: - * correct the time-to-go measurement for drift */ - if (gettimeofday(&now, NULL) == 0) { - if (now.tv_sec >= then.tv_sec) - break; - seconds_to_go = then.tv_sec - now.tv_sec; - } else - ++seconds_to_go; /* restore what we subtracted */ - } - if (quit) - break; /* breaks outer do-loop, skips redisplay */ - - /* since difference between "now" and "then" is already - * eaten up to within a couple of seconds, don't need to - * worry about overflow--but might have overshot (neg.) */ - if (gettimeofday(&now, NULL) == 0) { - usleep_usec = 1000000L*(then.tv_sec - now.tv_sec) + - then.tv_usec - now.tv_usec; - if (usleep_usec > 0) - usleep((ulg)usleep_usec); - } - } - } - - /* composite image against new background and display (note that - * we do not take into account the time spent doing this...) */ - rpng2_x_redisplay_image (0, 0, rpng2_info.width, rpng2_info.height); - } - - } else /* FALL THROUGH and do the normal thing */ - -#endif /* FEATURE_LOOP */ - - /* wait for the user to tell us when to quit */ - - if (rpng2_info.state >= kWindowInit) { - Trace((stderr, "entering final wait-for-quit-event loop\n")) - do { - XNextEvent(display, &e); - if (e.type == Expose) { - XExposeEvent *ex = (XExposeEvent *)&e; - rpng2_x_redisplay_image (ex->x, ex->y, ex->width, ex->height); - } - } while (!QUIT(e,k)); - } else { - fprintf(stderr, PROGNAME ": init callback never called: probable " - "libpng error while decoding PNG metadata\n"); - exit(4); - } - - - /* we're done: clean up all image and X resources and go away */ - - Trace((stderr, "about to call rpng2_x_cleanup()\n")) - rpng2_x_cleanup(); - - (void)argc; /* Unused */ - - return 0; -} - - - - - -/* this function is called by readpng2_info_callback() in readpng2.c, which - * in turn is called by libpng after all of the pre-IDAT chunks have been - * read and processed--i.e., we now have enough info to finish initializing */ - -static void rpng2_x_init(void) -{ - ulg i; - ulg rowbytes = rpng2_info.rowbytes; - - Trace((stderr, "beginning rpng2_x_init()\n")) - Trace((stderr, " rowbytes = %d\n", rpng2_info.rowbytes)) - Trace((stderr, " width = %ld\n", rpng2_info.width)) - Trace((stderr, " height = %ld\n", rpng2_info.height)) - - /* Guard against integer overflow */ - if (rpng2_info.height > ((size_t)(-1))/rpng2_info.rowbytes) { - fprintf(stderr, PROGNAME ": image_data buffer would be too large\n"); - readpng2_cleanup(&rpng2_info); - return; - } - - rpng2_info.image_data = (uch *)malloc(rowbytes * rpng2_info.height); - if (!rpng2_info.image_data) { - readpng2_cleanup(&rpng2_info); - return; - } - - rpng2_info.row_pointers = (uch **)malloc(rpng2_info.height * sizeof(uch *)); - if (!rpng2_info.row_pointers) { - free(rpng2_info.image_data); - rpng2_info.image_data = NULL; - readpng2_cleanup(&rpng2_info); - return; - } - - for (i = 0; i < rpng2_info.height; ++i) - rpng2_info.row_pointers[i] = rpng2_info.image_data + i*rowbytes; - - - /* do the basic X initialization stuff, make the window, and fill it with - * the user-specified, file-specified or default background color or - * pattern */ - - if (rpng2_x_create_window()) { - - /* GRR TEMPORARY HACK: this is fundamentally no different from cases - * above; libpng should call our error handler to longjmp() back to us - * when png_ptr goes away. If we/it segfault instead, seems like a - * libpng bug... */ - - /* we're here via libpng callback, so if window fails, clean and bail */ - readpng2_cleanup(&rpng2_info); - rpng2_x_cleanup(); - exit(2); - } - - rpng2_info.state = kWindowInit; -} - - - - - -static int rpng2_x_create_window(void) -{ - ulg bg_red = rpng2_info.bg_red; - ulg bg_green = rpng2_info.bg_green; - ulg bg_blue = rpng2_info.bg_blue; - ulg bg_pixel = 0L; - ulg attrmask; - int need_colormap = FALSE; - int screen, pad; - uch *xdata; - Window root; - XEvent e; - XGCValues gcvalues; - XSetWindowAttributes attr; - XTextProperty windowName, *pWindowName = &windowName; - XTextProperty iconName, *pIconName = &iconName; - XVisualInfo visual_info; - XSizeHints *size_hints; - XWMHints *wm_hints; - XClassHint *class_hints; - - - Trace((stderr, "beginning rpng2_x_create_window()\n")) - - screen = DefaultScreen(display); - depth = DisplayPlanes(display, screen); - root = RootWindow(display, screen); - -#ifdef DEBUG - XSynchronize(display, True); -#endif - - if (depth != 16 && depth != 24 && depth != 32) { - int visuals_matched = 0; - - Trace((stderr, "default depth is %d: checking other visuals\n", - depth)) - - /* 24-bit first */ - visual_info.screen = screen; - visual_info.depth = 24; - visual_list = XGetVisualInfo(display, - VisualScreenMask | VisualDepthMask, &visual_info, &visuals_matched); - if (visuals_matched == 0) { -/* GRR: add 15-, 16- and 32-bit TrueColor visuals (also DirectColor?) */ - fprintf(stderr, "default screen depth %d not supported, and no" - " 24-bit visuals found\n", depth); - return 2; - } - Trace((stderr, "XGetVisualInfo() returned %d 24-bit visuals\n", - visuals_matched)) - visual = visual_list[0].visual; - depth = visual_list[0].depth; -/* - colormap_size = visual_list[0].colormap_size; - visual_class = visual->class; - visualID = XVisualIDFromVisual(visual); - */ - have_nondefault_visual = TRUE; - need_colormap = TRUE; - } else { - XMatchVisualInfo(display, screen, depth, TrueColor, &visual_info); - visual = visual_info.visual; - } - - RMask = visual->red_mask; - GMask = visual->green_mask; - BMask = visual->blue_mask; - -/* GRR: add/check 8-bit support */ - if (depth == 8 || need_colormap) { - colormap = XCreateColormap(display, root, visual, AllocNone); - if (!colormap) { - fprintf(stderr, "XCreateColormap() failed\n"); - return 2; - } - have_colormap = TRUE; - if (depth == 8) - bg_image = FALSE; /* gradient just wastes palette entries */ - } - if (depth == 15 || depth == 16) { - RShift = 15 - rpng2_x_msb(RMask); /* these are right-shifts */ - GShift = 15 - rpng2_x_msb(GMask); - BShift = 15 - rpng2_x_msb(BMask); - } else if (depth > 16) { - RShift = rpng2_x_msb(RMask) - 7; /* these are left-shifts */ - GShift = rpng2_x_msb(GMask) - 7; - BShift = rpng2_x_msb(BMask) - 7; - } - if (depth >= 15 && (RShift < 0 || GShift < 0 || BShift < 0)) { - fprintf(stderr, "rpng2 internal logic error: negative X shift(s)!\n"); - return 2; - } - -/*--------------------------------------------------------------------------- - Finally, create the window. - ---------------------------------------------------------------------------*/ - - attr.backing_store = Always; - attr.event_mask = ExposureMask | KeyPressMask | ButtonPressMask; - attrmask = CWBackingStore | CWEventMask; - if (have_nondefault_visual) { - attr.colormap = colormap; - attr.background_pixel = 0; - attr.border_pixel = 1; - attrmask |= CWColormap | CWBackPixel | CWBorderPixel; - } - - window = XCreateWindow(display, root, 0, 0, rpng2_info.width, - rpng2_info.height, 0, depth, InputOutput, visual, attrmask, &attr); - - if (window == None) { - fprintf(stderr, "XCreateWindow() failed\n"); - return 2; - } else - have_window = TRUE; - - if (depth == 8) - XSetWindowColormap(display, window, colormap); - - if (!XStringListToTextProperty(&window_name, 1, pWindowName)) - pWindowName = NULL; - if (!XStringListToTextProperty(&icon_name, 1, pIconName)) - pIconName = NULL; - - /* OK if either hints allocation fails; XSetWMProperties() allows NULLs */ - - if ((size_hints = XAllocSizeHints()) != NULL) { - /* window will not be resizable */ - size_hints->flags = PMinSize | PMaxSize; - size_hints->min_width = size_hints->max_width = (int)rpng2_info.width; - size_hints->min_height = size_hints->max_height = - (int)rpng2_info.height; - } - - if ((wm_hints = XAllocWMHints()) != NULL) { - wm_hints->initial_state = NormalState; - wm_hints->input = True; - /* wm_hints->icon_pixmap = icon_pixmap; */ - wm_hints->flags = StateHint | InputHint /* | IconPixmapHint */ ; - } - - if ((class_hints = XAllocClassHint()) != NULL) { - class_hints->res_name = res_name; - class_hints->res_class = res_class; - } - - XSetWMProperties(display, window, pWindowName, pIconName, NULL, 0, - size_hints, wm_hints, class_hints); - - /* various properties and hints no longer needed; free memory */ - if (pWindowName) - XFree(pWindowName->value); - if (pIconName) - XFree(pIconName->value); - if (size_hints) - XFree(size_hints); - if (wm_hints) - XFree(wm_hints); - if (class_hints) - XFree(class_hints); - - XMapWindow(display, window); - - gc = XCreateGC(display, window, 0, &gcvalues); - have_gc = TRUE; - -/*--------------------------------------------------------------------------- - Allocate memory for the X- and display-specific version of the image. - ---------------------------------------------------------------------------*/ - - if (depth == 24 || depth == 32) { - xdata = (uch *)malloc(4*rpng2_info.width*rpng2_info.height); - pad = 32; - } else if (depth == 16) { - xdata = (uch *)malloc(2*rpng2_info.width*rpng2_info.height); - pad = 16; - } else /* depth == 8 */ { - xdata = (uch *)malloc(rpng2_info.width*rpng2_info.height); - pad = 8; - } - - if (!xdata) { - fprintf(stderr, PROGNAME ": unable to allocate image memory\n"); - return 4; - } - - ximage = XCreateImage(display, visual, depth, ZPixmap, 0, - (char *)xdata, rpng2_info.width, rpng2_info.height, pad, 0); - - if (!ximage) { - fprintf(stderr, PROGNAME ": XCreateImage() failed\n"); - free(xdata); - return 3; - } - - /* to avoid testing the byte order every pixel (or doubling the size of - * the drawing routine with a giant if-test), we arbitrarily set the byte - * order to MSBFirst and let Xlib worry about inverting things on little- - * endian machines (e.g., Linux/x86, old VAXen, etc.)--this is not the - * most efficient approach (the giant if-test would be better), but in - * the interest of clarity, we'll take the easy way out... */ - - ximage->byte_order = MSBFirst; - -/*--------------------------------------------------------------------------- - Fill window with the specified background color (default is black) or - faked "background image" (but latter is disabled if 8-bit; gradients - just waste palette entries). - ---------------------------------------------------------------------------*/ - - if (bg_image) - rpng2_x_load_bg_image(); /* resets bg_image if fails */ - - if (!bg_image) { - if (depth == 24 || depth == 32) { - bg_pixel = (bg_red << RShift) | - (bg_green << GShift) | - (bg_blue << BShift); - } else if (depth == 16) { - bg_pixel = (((bg_red << 8) >> RShift) & RMask) | - (((bg_green << 8) >> GShift) & GMask) | - (((bg_blue << 8) >> BShift) & BMask); - } else /* depth == 8 */ { - - /* GRR: add 8-bit support */ - - } - XSetForeground(display, gc, bg_pixel); - XFillRectangle(display, window, gc, 0, 0, rpng2_info.width, - rpng2_info.height); - } - -/*--------------------------------------------------------------------------- - Wait for first Expose event to do any drawing, then flush and return. - ---------------------------------------------------------------------------*/ - - do - XNextEvent(display, &e); - while (e.type != Expose || e.xexpose.count); - - XFlush(display); - - return 0; - -} /* end function rpng2_x_create_window() */ - - - - - -static int rpng2_x_load_bg_image(void) -{ - uch *src; - char *dest; - uch r1, r2, g1, g2, b1, b2; - uch r1_inv, r2_inv, g1_inv, g2_inv, b1_inv, b2_inv; - int k, hmax, max; - int xidx, yidx, yidx_max; - int even_odd_vert, even_odd_horiz, even_odd; - int invert_gradient2 = (bg[pat].type & 0x08); - int invert_column; - int ximage_rowbytes = ximage->bytes_per_line; - ulg i, row; - ulg pixel; - -/*--------------------------------------------------------------------------- - Allocate buffer for fake background image to be used with transparent - images; if this fails, revert to plain background color. - ---------------------------------------------------------------------------*/ - - bg_rowbytes = 3 * rpng2_info.width; - bg_data = (uch *)malloc(bg_rowbytes * rpng2_info.height); - if (!bg_data) { - fprintf(stderr, PROGNAME - ": unable to allocate memory for background image\n"); - bg_image = 0; - return 1; - } - - bgscale = (pat == 0)? 8 : bgscale_default; - yidx_max = bgscale - 1; - -/*--------------------------------------------------------------------------- - Vertical gradients (ramps) in NxN squares, alternating direction and - colors (N == bgscale). - ---------------------------------------------------------------------------*/ - - if ((bg[pat].type & 0x07) == 0) { - uch r1_min = rgb[bg[pat].rgb1_min].r; - uch g1_min = rgb[bg[pat].rgb1_min].g; - uch b1_min = rgb[bg[pat].rgb1_min].b; - uch r2_min = rgb[bg[pat].rgb2_min].r; - uch g2_min = rgb[bg[pat].rgb2_min].g; - uch b2_min = rgb[bg[pat].rgb2_min].b; - int r1_diff = rgb[bg[pat].rgb1_max].r - r1_min; - int g1_diff = rgb[bg[pat].rgb1_max].g - g1_min; - int b1_diff = rgb[bg[pat].rgb1_max].b - b1_min; - int r2_diff = rgb[bg[pat].rgb2_max].r - r2_min; - int g2_diff = rgb[bg[pat].rgb2_max].g - g2_min; - int b2_diff = rgb[bg[pat].rgb2_max].b - b2_min; - - for (row = 0; row < rpng2_info.height; ++row) { - yidx = (int)(row % bgscale); - even_odd_vert = (int)((row / bgscale) & 1); - - r1 = r1_min + (r1_diff * yidx) / yidx_max; - g1 = g1_min + (g1_diff * yidx) / yidx_max; - b1 = b1_min + (b1_diff * yidx) / yidx_max; - r1_inv = r1_min + (r1_diff * (yidx_max-yidx)) / yidx_max; - g1_inv = g1_min + (g1_diff * (yidx_max-yidx)) / yidx_max; - b1_inv = b1_min + (b1_diff * (yidx_max-yidx)) / yidx_max; - - r2 = r2_min + (r2_diff * yidx) / yidx_max; - g2 = g2_min + (g2_diff * yidx) / yidx_max; - b2 = b2_min + (b2_diff * yidx) / yidx_max; - r2_inv = r2_min + (r2_diff * (yidx_max-yidx)) / yidx_max; - g2_inv = g2_min + (g2_diff * (yidx_max-yidx)) / yidx_max; - b2_inv = b2_min + (b2_diff * (yidx_max-yidx)) / yidx_max; - - dest = (char *)bg_data + row*bg_rowbytes; - for (i = 0; i < rpng2_info.width; ++i) { - even_odd_horiz = (int)((i / bgscale) & 1); - even_odd = even_odd_vert ^ even_odd_horiz; - invert_column = - (even_odd_horiz && (bg[pat].type & 0x10)); - if (even_odd == 0) { /* gradient #1 */ - if (invert_column) { - *dest++ = r1_inv; - *dest++ = g1_inv; - *dest++ = b1_inv; - } else { - *dest++ = r1; - *dest++ = g1; - *dest++ = b1; - } - } else { /* gradient #2 */ - if ((invert_column && invert_gradient2) || - (!invert_column && !invert_gradient2)) - { - *dest++ = r2; /* not inverted or */ - *dest++ = g2; /* doubly inverted */ - *dest++ = b2; - } else { - *dest++ = r2_inv; - *dest++ = g2_inv; /* singly inverted */ - *dest++ = b2_inv; - } - } - } - } - -/*--------------------------------------------------------------------------- - Soft gradient-diamonds with scale = bgscale. Code contributed by Adam - M. Costello. - ---------------------------------------------------------------------------*/ - - } else if ((bg[pat].type & 0x07) == 1) { - - hmax = (bgscale-1)/2; /* half the max weight of a color */ - max = 2*hmax; /* the max weight of a color */ - - r1 = rgb[bg[pat].rgb1_max].r; - g1 = rgb[bg[pat].rgb1_max].g; - b1 = rgb[bg[pat].rgb1_max].b; - r2 = rgb[bg[pat].rgb2_max].r; - g2 = rgb[bg[pat].rgb2_max].g; - b2 = rgb[bg[pat].rgb2_max].b; - - for (row = 0; row < rpng2_info.height; ++row) { - yidx = (int)(row % bgscale); - if (yidx > hmax) - yidx = bgscale-1 - yidx; - dest = (char *)bg_data + row*bg_rowbytes; - for (i = 0; i < rpng2_info.width; ++i) { - xidx = (int)(i % bgscale); - if (xidx > hmax) - xidx = bgscale-1 - xidx; - k = xidx + yidx; - *dest++ = (k*r1 + (max-k)*r2) / max; - *dest++ = (k*g1 + (max-k)*g2) / max; - *dest++ = (k*b1 + (max-k)*b2) / max; - } - } - -/*--------------------------------------------------------------------------- - Radial "starburst" with azimuthal sinusoids; [eventually number of sinu- - soids will equal bgscale?]. This one is slow but very cool. Code con- - tributed by Pieter S. van der Meulen (originally in Smalltalk). - ---------------------------------------------------------------------------*/ - - } else if ((bg[pat].type & 0x07) == 2) { - uch ch; - int ii, x, y, hw, hh, grayspot; - double freq, rotate, saturate, gray, intensity; - double angle=0.0, aoffset=0.0, maxDist, dist; - double red=0.0, green=0.0, blue=0.0, hue, s, v, f, p, q, t; - - fprintf(stderr, "%s: computing radial background...", - PROGNAME); - fflush(stderr); - - hh = (int)(rpng2_info.height / 2); - hw = (int)(rpng2_info.width / 2); - - /* variables for radial waves: - * aoffset: number of degrees to rotate hue [CURRENTLY NOT USED] - * freq: number of color beams originating from the center - * grayspot: size of the graying center area (anti-alias) - * rotate: rotation of the beams as a function of radius - * saturate: saturation of beams' shape azimuthally - */ - angle = CLIP(angle, 0.0, 360.0); - grayspot = CLIP(bg[pat].bg_gray, 1, (hh + hw)); - freq = MAX((double)bg[pat].bg_freq, 0.0); - saturate = (double)bg[pat].bg_bsat * 0.1; - rotate = (double)bg[pat].bg_brot * 0.1; - gray = 0.0; - intensity = 0.0; - maxDist = (double)((hw*hw) + (hh*hh)); - - for (row = 0; row < rpng2_info.height; ++row) { - y = (int)(row - hh); - dest = (char *)bg_data + row*bg_rowbytes; - for (i = 0; i < rpng2_info.width; ++i) { - x = (int)(i - hw); - angle = (x == 0)? PI_2 : atan((double)y / (double)x); - gray = (double)MAX(ABS(y), ABS(x)) / grayspot; - gray = MIN(1.0, gray); - dist = (double)((x*x) + (y*y)) / maxDist; - intensity = cos((angle+(rotate*dist*PI)) * freq) * - gray * saturate; - intensity = (MAX(MIN(intensity,1.0),-1.0) + 1.0) * 0.5; - hue = (angle + PI) * INV_PI_360 + aoffset; - s = gray * ((double)(ABS(x)+ABS(y)) / (double)(hw + hh)); - s = MIN(MAX(s,0.0), 1.0); - v = MIN(MAX(intensity,0.0), 1.0); - - if (s == 0.0) { - ch = (uch)(v * 255.0); - *dest++ = ch; - *dest++ = ch; - *dest++ = ch; - } else { - if ((hue < 0.0) || (hue >= 360.0)) - hue -= (((int)(hue / 360.0)) * 360.0); - hue /= 60.0; - ii = (int)hue; - f = hue - (double)ii; - p = (1.0 - s) * v; - q = (1.0 - (s * f)) * v; - t = (1.0 - (s * (1.0 - f))) * v; - if (ii == 0) { red = v; green = t; blue = p; } - else if (ii == 1) { red = q; green = v; blue = p; } - else if (ii == 2) { red = p; green = v; blue = t; } - else if (ii == 3) { red = p; green = q; blue = v; } - else if (ii == 4) { red = t; green = p; blue = v; } - else if (ii == 5) { red = v; green = p; blue = q; } - *dest++ = (uch)(red * 255.0); - *dest++ = (uch)(green * 255.0); - *dest++ = (uch)(blue * 255.0); - } - } - } - fprintf(stderr, "done.\n"); - fflush(stderr); - } - -/*--------------------------------------------------------------------------- - Blast background image to display buffer before beginning PNG decode. - ---------------------------------------------------------------------------*/ - - if (depth == 24 || depth == 32) { - ulg red, green, blue; - int bpp = ximage->bits_per_pixel; - - for (row = 0; row < rpng2_info.height; ++row) { - src = bg_data + row*bg_rowbytes; - dest = ximage->data + row*ximage_rowbytes; - if (bpp == 32) { /* slightly optimized version */ - for (i = rpng2_info.width; i > 0; --i) { - red = *src++; - green = *src++; - blue = *src++; - pixel = (red << RShift) | - (green << GShift) | - (blue << BShift); - /* recall that we set ximage->byte_order = MSBFirst above */ - *dest++ = (char)((pixel >> 24) & 0xff); - *dest++ = (char)((pixel >> 16) & 0xff); - *dest++ = (char)((pixel >> 8) & 0xff); - *dest++ = (char)( pixel & 0xff); - } - } else { - for (i = rpng2_info.width; i > 0; --i) { - red = *src++; - green = *src++; - blue = *src++; - pixel = (red << RShift) | - (green << GShift) | - (blue << BShift); - /* recall that we set ximage->byte_order = MSBFirst above */ - /* GRR BUG? this assumes bpp == 24 & bits are packed low */ - /* (probably need to use RShift, RMask, etc.) */ - *dest++ = (char)((pixel >> 16) & 0xff); - *dest++ = (char)((pixel >> 8) & 0xff); - *dest++ = (char)( pixel & 0xff); - } - } - } - - } else if (depth == 16) { - ush red, green, blue; - - for (row = 0; row < rpng2_info.height; ++row) { - src = bg_data + row*bg_rowbytes; - dest = ximage->data + row*ximage_rowbytes; - for (i = rpng2_info.width; i > 0; --i) { - red = ((ush)(*src) << 8); ++src; - green = ((ush)(*src) << 8); ++src; - blue = ((ush)(*src) << 8); ++src; - pixel = ((red >> RShift) & RMask) | - ((green >> GShift) & GMask) | - ((blue >> BShift) & BMask); - /* recall that we set ximage->byte_order = MSBFirst above */ - *dest++ = (char)((pixel >> 8) & 0xff); - *dest++ = (char)( pixel & 0xff); - } - } - - } else /* depth == 8 */ { - - /* GRR: add 8-bit support */ - - } - - XPutImage(display, window, gc, ximage, 0, 0, 0, 0, rpng2_info.width, - rpng2_info.height); - - return 0; - -} /* end function rpng2_x_load_bg_image() */ - - - - - -static void rpng2_x_display_row(ulg row) -{ - uch bg_red = rpng2_info.bg_red; - uch bg_green = rpng2_info.bg_green; - uch bg_blue = rpng2_info.bg_blue; - uch *src, *src2=NULL; - char *dest; - uch r, g, b, a; - int ximage_rowbytes = ximage->bytes_per_line; - ulg i, pixel; - static int rows=0, prevpass=(-1); - static ulg firstrow; - -/*--------------------------------------------------------------------------- - rows and firstrow simply track how many rows (and which ones) have not - yet been displayed; alternatively, we could call XPutImage() for every - row and not bother with the records-keeping. - ---------------------------------------------------------------------------*/ - - Trace((stderr, "beginning rpng2_x_display_row()\n")) - - if (rpng2_info.pass != prevpass) { - if (pause_after_pass && rpng2_info.pass > 0) { - XEvent e; - KeySym k; - - fprintf(stderr, - "%s: end of pass %d of 7; click in image window to continue\n", - PROGNAME, prevpass + 1); - do - XNextEvent(display, &e); - while (!QUIT(e,k)); - } - fprintf(stderr, "%s: pass %d of 7\r", PROGNAME, rpng2_info.pass + 1); - fflush(stderr); - prevpass = rpng2_info.pass; - } - - if (rows == 0) - firstrow = row; /* first row that is not yet displayed */ - - ++rows; /* count of rows received but not yet displayed */ - -/*--------------------------------------------------------------------------- - Aside from the use of the rpng2_info struct, the lack of an outer loop - (over rows) and moving the XPutImage() call outside the "if (depth)" - tests, this routine is identical to rpng_x_display_image() in the non- - progressive version of the program. - ---------------------------------------------------------------------------*/ - - if (depth == 24 || depth == 32) { - ulg red, green, blue; - int bpp = ximage->bits_per_pixel; - - src = rpng2_info.image_data + row*rpng2_info.rowbytes; - if (bg_image) - src2 = bg_data + row*bg_rowbytes; - dest = ximage->data + row*ximage_rowbytes; - if (rpng2_info.channels == 3) { - for (i = rpng2_info.width; i > 0; --i) { - red = *src++; - green = *src++; - blue = *src++; - pixel = (red << RShift) | - (green << GShift) | - (blue << BShift); - /* recall that we set ximage->byte_order = MSBFirst above */ - if (bpp == 32) { - *dest++ = (char)((pixel >> 24) & 0xff); - *dest++ = (char)((pixel >> 16) & 0xff); - *dest++ = (char)((pixel >> 8) & 0xff); - *dest++ = (char)( pixel & 0xff); - } else { - /* GRR BUG? this assumes bpp == 24 & bits are packed low */ - /* (probably need to use RShift, RMask, etc.) */ - *dest++ = (char)((pixel >> 16) & 0xff); - *dest++ = (char)((pixel >> 8) & 0xff); - *dest++ = (char)( pixel & 0xff); - } - } - } else /* if (rpng2_info.channels == 4) */ { - for (i = rpng2_info.width; i > 0; --i) { - r = *src++; - g = *src++; - b = *src++; - a = *src++; - if (bg_image) { - bg_red = *src2++; - bg_green = *src2++; - bg_blue = *src2++; - } - if (a == 255) { - red = r; - green = g; - blue = b; - } else if (a == 0) { - red = bg_red; - green = bg_green; - blue = bg_blue; - } else { - /* this macro (from png.h) composites the foreground - * and background values and puts the result into the - * first argument */ - alpha_composite(red, r, a, bg_red); - alpha_composite(green, g, a, bg_green); - alpha_composite(blue, b, a, bg_blue); - } - pixel = (red << RShift) | - (green << GShift) | - (blue << BShift); - /* recall that we set ximage->byte_order = MSBFirst above */ - if (bpp == 32) { - *dest++ = (char)((pixel >> 24) & 0xff); - *dest++ = (char)((pixel >> 16) & 0xff); - *dest++ = (char)((pixel >> 8) & 0xff); - *dest++ = (char)( pixel & 0xff); - } else { - /* GRR BUG? this assumes bpp == 24 & bits are packed low */ - /* (probably need to use RShift, RMask, etc.) */ - *dest++ = (char)((pixel >> 16) & 0xff); - *dest++ = (char)((pixel >> 8) & 0xff); - *dest++ = (char)( pixel & 0xff); - } - } - } - - } else if (depth == 16) { - ush red, green, blue; - - src = rpng2_info.row_pointers[row]; - if (bg_image) - src2 = bg_data + row*bg_rowbytes; - dest = ximage->data + row*ximage_rowbytes; - if (rpng2_info.channels == 3) { - for (i = rpng2_info.width; i > 0; --i) { - red = ((ush)(*src) << 8); - ++src; - green = ((ush)(*src) << 8); - ++src; - blue = ((ush)(*src) << 8); - ++src; - pixel = ((red >> RShift) & RMask) | - ((green >> GShift) & GMask) | - ((blue >> BShift) & BMask); - /* recall that we set ximage->byte_order = MSBFirst above */ - *dest++ = (char)((pixel >> 8) & 0xff); - *dest++ = (char)( pixel & 0xff); - } - } else /* if (rpng2_info.channels == 4) */ { - for (i = rpng2_info.width; i > 0; --i) { - r = *src++; - g = *src++; - b = *src++; - a = *src++; - if (bg_image) { - bg_red = *src2++; - bg_green = *src2++; - bg_blue = *src2++; - } - if (a == 255) { - red = ((ush)r << 8); - green = ((ush)g << 8); - blue = ((ush)b << 8); - } else if (a == 0) { - red = ((ush)bg_red << 8); - green = ((ush)bg_green << 8); - blue = ((ush)bg_blue << 8); - } else { - /* this macro (from png.h) composites the foreground - * and background values and puts the result back into - * the first argument (== fg byte here: safe) */ - alpha_composite(r, r, a, bg_red); - alpha_composite(g, g, a, bg_green); - alpha_composite(b, b, a, bg_blue); - red = ((ush)r << 8); - green = ((ush)g << 8); - blue = ((ush)b << 8); - } - pixel = ((red >> RShift) & RMask) | - ((green >> GShift) & GMask) | - ((blue >> BShift) & BMask); - /* recall that we set ximage->byte_order = MSBFirst above */ - *dest++ = (char)((pixel >> 8) & 0xff); - *dest++ = (char)( pixel & 0xff); - } - } - - } else /* depth == 8 */ { - - /* GRR: add 8-bit support */ - - } - - -/*--------------------------------------------------------------------------- - Display after every 16 rows or when on one of last two rows. (Region - may include previously displayed lines due to interlacing--i.e., not - contiguous. Also, second-to-last row is final one in interlaced images - with odd number of rows.) For demos, flush (and delay) after every 16th - row so "sparse" passes don't go twice as fast. - ---------------------------------------------------------------------------*/ - - if (demo_timing && (row - firstrow >= 16 || row >= rpng2_info.height-2)) { - XPutImage(display, window, gc, ximage, 0, (int)firstrow, 0, - (int)firstrow, rpng2_info.width, row - firstrow + 1); - XFlush(display); - rows = 0; - usleep(usleep_duration); - } else - if (!demo_timing && ((rows & 0xf) == 0 || row >= rpng2_info.height-2)) { - XPutImage(display, window, gc, ximage, 0, (int)firstrow, 0, - (int)firstrow, rpng2_info.width, row - firstrow + 1); - XFlush(display); - rows = 0; - } - -} - - - - - -static void rpng2_x_finish_display(void) -{ - Trace((stderr, "beginning rpng2_x_finish_display()\n")) - - /* last row has already been displayed by rpng2_x_display_row(), so we - * have nothing to do here except set a flag and let the user know that - * the image is done */ - - rpng2_info.state = kDone; - printf( - "Done. Press Q, Esc or mouse button 1 (within image window) to quit.\n"); - fflush(stdout); -} - - - - - -static void rpng2_x_redisplay_image(ulg startcol, ulg startrow, - ulg width, ulg height) -{ - uch bg_red = rpng2_info.bg_red; - uch bg_green = rpng2_info.bg_green; - uch bg_blue = rpng2_info.bg_blue; - uch *src, *src2=NULL; - char *dest; - uch r, g, b, a; - ulg i, row, lastrow = 0; - ulg pixel; - int ximage_rowbytes = ximage->bytes_per_line; - - - Trace((stderr, "beginning display loop (image_channels == %d)\n", - rpng2_info.channels)) - Trace((stderr, " (width = %ld, rowbytes = %d, ximage_rowbytes = %d)\n", - rpng2_info.width, rpng2_info.rowbytes, ximage_rowbytes)) - Trace((stderr, " (bpp = %d)\n", ximage->bits_per_pixel)) - Trace((stderr, " (byte_order = %s)\n", ximage->byte_order == MSBFirst? - "MSBFirst" : (ximage->byte_order == LSBFirst? "LSBFirst" : "unknown"))) - -/*--------------------------------------------------------------------------- - Aside from the use of the rpng2_info struct and of src2 (for background - image), this routine is identical to rpng_x_display_image() in the non- - progressive version of the program--for the simple reason that redisplay - of the image against a new background happens after the image is fully - decoded and therefore is, by definition, non-progressive. - ---------------------------------------------------------------------------*/ - - if (depth == 24 || depth == 32) { - ulg red, green, blue; - int bpp = ximage->bits_per_pixel; - - for (lastrow = row = startrow; row < startrow+height; ++row) { - src = rpng2_info.image_data + row*rpng2_info.rowbytes; - if (bg_image) - src2 = bg_data + row*bg_rowbytes; - dest = ximage->data + row*ximage_rowbytes; - if (rpng2_info.channels == 3) { - for (i = rpng2_info.width; i > 0; --i) { - red = *src++; - green = *src++; - blue = *src++; -#ifdef NO_24BIT_MASKS - pixel = (red << RShift) | - (green << GShift) | - (blue << BShift); - /* recall that we set ximage->byte_order = MSBFirst above */ - if (bpp == 32) { - *dest++ = (char)((pixel >> 24) & 0xff); - *dest++ = (char)((pixel >> 16) & 0xff); - *dest++ = (char)((pixel >> 8) & 0xff); - *dest++ = (char)( pixel & 0xff); - } else { - /* this assumes bpp == 24 & bits are packed low */ - /* (probably need to use RShift, RMask, etc.) */ - *dest++ = (char)((pixel >> 16) & 0xff); - *dest++ = (char)((pixel >> 8) & 0xff); - *dest++ = (char)( pixel & 0xff); - } -#else - red = (RShift < 0)? red << (-RShift) : red >> RShift; - green = (GShift < 0)? green << (-GShift) : green >> GShift; - blue = (BShift < 0)? blue << (-BShift) : blue >> BShift; - pixel = (red & RMask) | (green & GMask) | (blue & BMask); - /* recall that we set ximage->byte_order = MSBFirst above */ - if (bpp == 32) { - *dest++ = (char)((pixel >> 24) & 0xff); - *dest++ = (char)((pixel >> 16) & 0xff); - *dest++ = (char)((pixel >> 8) & 0xff); - *dest++ = (char)( pixel & 0xff); - } else { - /* GRR BUG */ - /* this assumes bpp == 24 & bits are packed low */ - /* (probably need to use RShift/RMask/etc. here, too) */ - *dest++ = (char)((pixel >> 16) & 0xff); - *dest++ = (char)((pixel >> 8) & 0xff); - *dest++ = (char)( pixel & 0xff); - } -#endif - } - - } else /* if (rpng2_info.channels == 4) */ { - for (i = rpng2_info.width; i > 0; --i) { - r = *src++; - g = *src++; - b = *src++; - a = *src++; - if (bg_image) { - bg_red = *src2++; - bg_green = *src2++; - bg_blue = *src2++; - } - if (a == 255) { - red = r; - green = g; - blue = b; - } else if (a == 0) { - red = bg_red; - green = bg_green; - blue = bg_blue; - } else { - /* this macro (from png.h) composites the foreground - * and background values and puts the result into the - * first argument */ - alpha_composite(red, r, a, bg_red); - alpha_composite(green, g, a, bg_green); - alpha_composite(blue, b, a, bg_blue); - } -#ifdef NO_24BIT_MASKS - pixel = (red << RShift) | - (green << GShift) | - (blue << BShift); - /* recall that we set ximage->byte_order = MSBFirst above */ - if (bpp == 32) { - *dest++ = (char)((pixel >> 24) & 0xff); - *dest++ = (char)((pixel >> 16) & 0xff); - *dest++ = (char)((pixel >> 8) & 0xff); - *dest++ = (char)( pixel & 0xff); - } else { - /* this assumes bpp == 24 & bits are packed low */ - /* (probably need to use RShift, RMask, etc.) */ - *dest++ = (char)((pixel >> 16) & 0xff); - *dest++ = (char)((pixel >> 8) & 0xff); - *dest++ = (char)( pixel & 0xff); - } -#else - red = (RShift < 0)? red << (-RShift) : red >> RShift; - green = (GShift < 0)? green << (-GShift) : green >> GShift; - blue = (BShift < 0)? blue << (-BShift) : blue >> BShift; - pixel = (red & RMask) | (green & GMask) | (blue & BMask); - /* recall that we set ximage->byte_order = MSBFirst above */ - if (bpp == 32) { - *dest++ = (char)((pixel >> 24) & 0xff); - *dest++ = (char)((pixel >> 16) & 0xff); - *dest++ = (char)((pixel >> 8) & 0xff); - *dest++ = (char)( pixel & 0xff); - } else { - /* GRR BUG */ - /* this assumes bpp == 24 & bits are packed low */ - /* (probably need to use RShift/RMask/etc. here, too) */ - *dest++ = (char)((pixel >> 16) & 0xff); - *dest++ = (char)((pixel >> 8) & 0xff); - *dest++ = (char)( pixel & 0xff); - } -#endif - } - } - /* display after every 16 lines */ - if (((row+1) & 0xf) == 0) { - XPutImage(display, window, gc, ximage, 0, (int)lastrow, 0, - (int)lastrow, rpng2_info.width, 16); - XFlush(display); - lastrow = row + 1; - } - } - - } else if (depth == 16) { - ush red, green, blue; - - for (lastrow = row = startrow; row < startrow+height; ++row) { - src = rpng2_info.row_pointers[row]; - if (bg_image) - src2 = bg_data + row*bg_rowbytes; - dest = ximage->data + row*ximage_rowbytes; - if (rpng2_info.channels == 3) { - for (i = rpng2_info.width; i > 0; --i) { - red = ((ush)(*src) << 8); - ++src; - green = ((ush)(*src) << 8); - ++src; - blue = ((ush)(*src) << 8); - ++src; - pixel = ((red >> RShift) & RMask) | - ((green >> GShift) & GMask) | - ((blue >> BShift) & BMask); - /* recall that we set ximage->byte_order = MSBFirst above */ - *dest++ = (char)((pixel >> 8) & 0xff); - *dest++ = (char)( pixel & 0xff); - } - } else /* if (rpng2_info.channels == 4) */ { - for (i = rpng2_info.width; i > 0; --i) { - r = *src++; - g = *src++; - b = *src++; - a = *src++; - if (bg_image) { - bg_red = *src2++; - bg_green = *src2++; - bg_blue = *src2++; - } - if (a == 255) { - red = ((ush)r << 8); - green = ((ush)g << 8); - blue = ((ush)b << 8); - } else if (a == 0) { - red = ((ush)bg_red << 8); - green = ((ush)bg_green << 8); - blue = ((ush)bg_blue << 8); - } else { - /* this macro (from png.h) composites the foreground - * and background values and puts the result back into - * the first argument (== fg byte here: safe) */ - alpha_composite(r, r, a, bg_red); - alpha_composite(g, g, a, bg_green); - alpha_composite(b, b, a, bg_blue); - red = ((ush)r << 8); - green = ((ush)g << 8); - blue = ((ush)b << 8); - } - pixel = ((red >> RShift) & RMask) | - ((green >> GShift) & GMask) | - ((blue >> BShift) & BMask); - /* recall that we set ximage->byte_order = MSBFirst above */ - *dest++ = (char)((pixel >> 8) & 0xff); - *dest++ = (char)( pixel & 0xff); - } - } - /* display after every 16 lines */ - if (((row+1) & 0xf) == 0) { - XPutImage(display, window, gc, ximage, 0, (int)lastrow, 0, - (int)lastrow, rpng2_info.width, 16); - XFlush(display); - lastrow = row + 1; - } - } - - } else /* depth == 8 */ { - - /* GRR: add 8-bit support */ - - } - - Trace((stderr, "calling final XPutImage()\n")) - if (lastrow < startrow+height) { - XPutImage(display, window, gc, ximage, 0, (int)lastrow, 0, - (int)lastrow, rpng2_info.width, rpng2_info.height-lastrow); - XFlush(display); - } - - (void)startcol; - (void)width; - -} /* end function rpng2_x_redisplay_image() */ - - - - - -#ifdef FEATURE_LOOP - -static void rpng2_x_reload_bg_image(void) -{ - char *dest; - uch r1, r2, g1, g2, b1, b2; - uch r1_inv, r2_inv, g1_inv, g2_inv, b1_inv, b2_inv; - int k, hmax, max; - int xidx, yidx, yidx_max; - int even_odd_vert, even_odd_horiz, even_odd; - int invert_gradient2 = (bg[pat].type & 0x08); - int invert_column; - ulg i, row; - - - bgscale = (pat == 0)? 8 : bgscale_default; - yidx_max = bgscale - 1; - -/*--------------------------------------------------------------------------- - Vertical gradients (ramps) in NxN squares, alternating direction and - colors (N == bgscale). - ---------------------------------------------------------------------------*/ - - if ((bg[pat].type & 0x07) == 0) { - uch r1_min = rgb[bg[pat].rgb1_min].r; - uch g1_min = rgb[bg[pat].rgb1_min].g; - uch b1_min = rgb[bg[pat].rgb1_min].b; - uch r2_min = rgb[bg[pat].rgb2_min].r; - uch g2_min = rgb[bg[pat].rgb2_min].g; - uch b2_min = rgb[bg[pat].rgb2_min].b; - int r1_diff = rgb[bg[pat].rgb1_max].r - r1_min; - int g1_diff = rgb[bg[pat].rgb1_max].g - g1_min; - int b1_diff = rgb[bg[pat].rgb1_max].b - b1_min; - int r2_diff = rgb[bg[pat].rgb2_max].r - r2_min; - int g2_diff = rgb[bg[pat].rgb2_max].g - g2_min; - int b2_diff = rgb[bg[pat].rgb2_max].b - b2_min; - - for (row = 0; row < rpng2_info.height; ++row) { - yidx = (int)(row % bgscale); - even_odd_vert = (int)((row / bgscale) & 1); - - r1 = r1_min + (r1_diff * yidx) / yidx_max; - g1 = g1_min + (g1_diff * yidx) / yidx_max; - b1 = b1_min + (b1_diff * yidx) / yidx_max; - r1_inv = r1_min + (r1_diff * (yidx_max-yidx)) / yidx_max; - g1_inv = g1_min + (g1_diff * (yidx_max-yidx)) / yidx_max; - b1_inv = b1_min + (b1_diff * (yidx_max-yidx)) / yidx_max; - - r2 = r2_min + (r2_diff * yidx) / yidx_max; - g2 = g2_min + (g2_diff * yidx) / yidx_max; - b2 = b2_min + (b2_diff * yidx) / yidx_max; - r2_inv = r2_min + (r2_diff * (yidx_max-yidx)) / yidx_max; - g2_inv = g2_min + (g2_diff * (yidx_max-yidx)) / yidx_max; - b2_inv = b2_min + (b2_diff * (yidx_max-yidx)) / yidx_max; - - dest = (char *)bg_data + row*bg_rowbytes; - for (i = 0; i < rpng2_info.width; ++i) { - even_odd_horiz = (int)((i / bgscale) & 1); - even_odd = even_odd_vert ^ even_odd_horiz; - invert_column = - (even_odd_horiz && (bg[pat].type & 0x10)); - if (even_odd == 0) { /* gradient #1 */ - if (invert_column) { - *dest++ = r1_inv; - *dest++ = g1_inv; - *dest++ = b1_inv; - } else { - *dest++ = r1; - *dest++ = g1; - *dest++ = b1; - } - } else { /* gradient #2 */ - if ((invert_column && invert_gradient2) || - (!invert_column && !invert_gradient2)) - { - *dest++ = r2; /* not inverted or */ - *dest++ = g2; /* doubly inverted */ - *dest++ = b2; - } else { - *dest++ = r2_inv; - *dest++ = g2_inv; /* singly inverted */ - *dest++ = b2_inv; - } - } - } - } - -/*--------------------------------------------------------------------------- - Soft gradient-diamonds with scale = bgscale. Code contributed by Adam - M. Costello. - ---------------------------------------------------------------------------*/ - - } else if ((bg[pat].type & 0x07) == 1) { - - hmax = (bgscale-1)/2; /* half the max weight of a color */ - max = 2*hmax; /* the max weight of a color */ - - r1 = rgb[bg[pat].rgb1_max].r; - g1 = rgb[bg[pat].rgb1_max].g; - b1 = rgb[bg[pat].rgb1_max].b; - r2 = rgb[bg[pat].rgb2_max].r; - g2 = rgb[bg[pat].rgb2_max].g; - b2 = rgb[bg[pat].rgb2_max].b; - - for (row = 0; row < rpng2_info.height; ++row) { - yidx = (int)(row % bgscale); - if (yidx > hmax) - yidx = bgscale-1 - yidx; - dest = (char *)bg_data + row*bg_rowbytes; - for (i = 0; i < rpng2_info.width; ++i) { - xidx = (int)(i % bgscale); - if (xidx > hmax) - xidx = bgscale-1 - xidx; - k = xidx + yidx; - *dest++ = (k*r1 + (max-k)*r2) / max; - *dest++ = (k*g1 + (max-k)*g2) / max; - *dest++ = (k*b1 + (max-k)*b2) / max; - } - } - -/*--------------------------------------------------------------------------- - Radial "starburst" with azimuthal sinusoids; [eventually number of sinu- - soids will equal bgscale?]. This one is slow but very cool. Code con- - tributed by Pieter S. van der Meulen (originally in Smalltalk). - ---------------------------------------------------------------------------*/ - - } else if ((bg[pat].type & 0x07) == 2) { - uch ch; - int ii, x, y, hw, hh, grayspot; - double freq, rotate, saturate, gray, intensity; - double angle=0.0, aoffset=0.0, maxDist, dist; - double red=0.0, green=0.0, blue=0.0, hue, s, v, f, p, q, t; - - hh = (int)(rpng2_info.height / 2); - hw = (int)(rpng2_info.width / 2); - - /* variables for radial waves: - * aoffset: number of degrees to rotate hue [CURRENTLY NOT USED] - * freq: number of color beams originating from the center - * grayspot: size of the graying center area (anti-alias) - * rotate: rotation of the beams as a function of radius - * saturate: saturation of beams' shape azimuthally - */ - angle = CLIP(angle, 0.0, 360.0); - grayspot = CLIP(bg[pat].bg_gray, 1, (hh + hw)); - freq = MAX((double)bg[pat].bg_freq, 0.0); - saturate = (double)bg[pat].bg_bsat * 0.1; - rotate = (double)bg[pat].bg_brot * 0.1; - gray = 0.0; - intensity = 0.0; - maxDist = (double)((hw*hw) + (hh*hh)); - - for (row = 0; row < rpng2_info.height; ++row) { - y = (int)(row - hh); - dest = (char *)bg_data + row*bg_rowbytes; - for (i = 0; i < rpng2_info.width; ++i) { - x = (int)(i - hw); - angle = (x == 0)? PI_2 : atan((double)y / (double)x); - gray = (double)MAX(ABS(y), ABS(x)) / grayspot; - gray = MIN(1.0, gray); - dist = (double)((x*x) + (y*y)) / maxDist; - intensity = cos((angle+(rotate*dist*PI)) * freq) * - gray * saturate; - intensity = (MAX(MIN(intensity,1.0),-1.0) + 1.0) * 0.5; - hue = (angle + PI) * INV_PI_360 + aoffset; - s = gray * ((double)(ABS(x)+ABS(y)) / (double)(hw + hh)); - s = MIN(MAX(s,0.0), 1.0); - v = MIN(MAX(intensity,0.0), 1.0); - - if (s == 0.0) { - ch = (uch)(v * 255.0); - *dest++ = ch; - *dest++ = ch; - *dest++ = ch; - } else { - if ((hue < 0.0) || (hue >= 360.0)) - hue -= (((int)(hue / 360.0)) * 360.0); - hue /= 60.0; - ii = (int)hue; - f = hue - (double)ii; - p = (1.0 - s) * v; - q = (1.0 - (s * f)) * v; - t = (1.0 - (s * (1.0 - f))) * v; - if (ii == 0) { red = v; green = t; blue = p; } - else if (ii == 1) { red = q; green = v; blue = p; } - else if (ii == 2) { red = p; green = v; blue = t; } - else if (ii == 3) { red = p; green = q; blue = v; } - else if (ii == 4) { red = t; green = p; blue = v; } - else if (ii == 5) { red = v; green = p; blue = q; } - *dest++ = (uch)(red * 255.0); - *dest++ = (uch)(green * 255.0); - *dest++ = (uch)(blue * 255.0); - } - } - } - } - -} /* end function rpng2_x_reload_bg_image() */ - - - - - -static int is_number(char *p) -{ - while (*p) { - if (!isdigit(*p)) - return FALSE; - ++p; - } - return TRUE; -} - -#endif /* FEATURE_LOOP */ - - - - - -static void rpng2_x_cleanup(void) -{ - if (bg_image && bg_data) { - free(bg_data); - bg_data = NULL; - } - - if (rpng2_info.image_data) { - free(rpng2_info.image_data); - rpng2_info.image_data = NULL; - } - - if (rpng2_info.row_pointers) { - free(rpng2_info.row_pointers); - rpng2_info.row_pointers = NULL; - } - - if (ximage) { - if (ximage->data) { - free(ximage->data); /* we allocated it, so we free it */ - ximage->data = (char *)NULL; /* instead of XDestroyImage() */ - } - XDestroyImage(ximage); - ximage = NULL; - } - - if (have_gc) - XFreeGC(display, gc); - - if (have_window) - XDestroyWindow(display, window); - - if (have_colormap) - XFreeColormap(display, colormap); - - if (have_nondefault_visual) - XFree(visual_list); -} - - - - - -static int rpng2_x_msb(ulg u32val) -{ - int i; - - for (i = 31; i >= 0; --i) { - if (u32val & 0x80000000L) - break; - u32val <<= 1; - } - return i; -} diff --git a/lib/libpng-1.6.37/contrib/gregbook/wpng.c b/lib/libpng-1.6.37/contrib/gregbook/wpng.c deleted file mode 100644 index a8f367f..0000000 --- a/lib/libpng-1.6.37/contrib/gregbook/wpng.c +++ /dev/null @@ -1,865 +0,0 @@ -/*--------------------------------------------------------------------------- - - wpng - simple PNG-writing program wpng.c - - This program converts certain NetPBM binary files (grayscale and RGB, - maxval = 255) to PNG. Non-interlaced PNGs are written progressively; - interlaced PNGs are read and written in one memory-intensive blast. - - Thanks to Jean-loup Gailly for providing the necessary trick to read - interactive text from the keyboard while stdin is redirected. Thanks - to Cosmin Truta for Cygwin fixes. - - NOTE: includes provisional support for PNM type "8" (portable alphamap) - images, presumed to be a 32-bit interleaved RGBA format; no pro- - vision for possible interleaved grayscale+alpha (16-bit) format. - THIS IS UNLIKELY TO BECOME AN OFFICIAL NETPBM ALPHA FORMAT! - - to do: - - delete output file if quit before calling any writepng routines - - process backspace with -text option under DOS/Win? (currently get ^H) - - --------------------------------------------------------------------------- - - Changelog: - - 1.01: initial public release - - 1.02: modified to allow abbreviated options - - 1.03: removed extraneous character from usage screen; fixed bug in - command-line parsing - - 1.04: fixed DOS/OS2/Win32 detection, including partial Cygwin fix - (see http://home.att.net/~perlspinr/diffs/GregBook_cygwin.diff) - - 2.00: dual-licensed (added GNU GPL) - - 2.01: check for integer overflow (Glenn R-P) - - [REPORTED BUG (win32 only): "contrib/gregbook/wpng.c - cmd line - dose not work! In order to do something useful I needed to redirect - both input and output, with cygwin and with bcc32 as well. Under - Linux, the same wpng appears to work fine. I don't know what is - the problem."] - - --------------------------------------------------------------------------- - - Copyright (c) 1998-2007, 2017 Greg Roelofs. All rights reserved. - - This software is provided "as is," without warranty of any kind, - express or implied. In no event shall the author or contributors - be held liable for any damages arising in any way from the use of - this software. - - The contents of this file are DUAL-LICENSED. You may modify and/or - redistribute this software according to the terms of one of the - following two licenses (at your option): - - - LICENSE 1 ("BSD-like with advertising clause"): - - Permission is granted to anyone to use this software for any purpose, - including commercial applications, and to alter it and redistribute - it freely, subject to the following restrictions: - - 1. Redistributions of source code must retain the above copyright - notice, disclaimer, and this list of conditions. - 2. Redistributions in binary form must reproduce the above copyright - notice, disclaimer, and this list of conditions in the documenta- - tion and/or other materials provided with the distribution. - 3. All advertising materials mentioning features or use of this - software must display the following acknowledgment: - - This product includes software developed by Greg Roelofs - and contributors for the book, "PNG: The Definitive Guide," - published by O'Reilly and Associates. - - - LICENSE 2 (GNU GPL v2 or later): - - This program is free software; you can redistribute it and/or modify - it under the terms of the GNU General Public License as published by - the Free Software Foundation; either version 2 of the License, or - (at your option) any later version. - - This program is distributed in the hope that it will be useful, - but WITHOUT ANY WARRANTY; without even the implied warranty of - MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - GNU General Public License for more details. - - You should have received a copy of the GNU General Public License - along with this program; if not, write to the Free Software Foundation, - Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA - - ---------------------------------------------------------------------------*/ - -#define PROGNAME "wpng" -#define VERSION "2.00 of 2 June 2007" -#define APPNAME "Simple PGM/PPM/PAM to PNG Converter" - -#if defined(__MSDOS__) || defined(__OS2__) -# define DOS_OS2_W32 -#elif defined(WIN32) || defined(_WIN32) || defined(__WIN32__) -# ifndef __GNUC__ /* treat Win32 native ports of gcc as Unix environments */ -# define DOS_OS2_W32 -# endif -#endif - -#include -#include -#include -#include /* for jmpbuf declaration in writepng.h */ -#include - -#ifdef DOS_OS2_W32 -# include /* for isatty(), setmode() prototypes */ -# include /* O_BINARY for fdopen() without text translation */ -# ifdef __EMX__ -# ifndef getch -# define getch() _read_kbd(0, 1, 0) /* need getche() */ -# endif -# else /* !__EMX__ */ -# ifdef __GO32__ -# include -# define getch() getkey() /* GRR: need getche() */ -# else -# include /* for getche() console input */ -# endif -# endif /* ?__EMX__ */ -# define FGETS(buf,len,stream) dos_kbd_gets(buf,len) -#else -# include /* for isatty() prototype */ -# define FGETS fgets -#endif - -/* #define DEBUG : this enables the Trace() macros */ - -/* #define FORBID_LATIN1_CTRL : this requires the user to re-enter any - text that includes control characters discouraged by the PNG spec; text - that includes an escape character (27) must be re-entered regardless */ - -#include "writepng.h" /* typedefs, common macros, writepng prototypes */ - - - -/* local prototypes */ - -static int wpng_isvalid_latin1(uch *p, int len); -static void wpng_cleanup(void); - -#ifdef DOS_OS2_W32 - static char *dos_kbd_gets(char *buf, int len); -#endif - - - -static mainprog_info wpng_info; /* lone global */ - - - -int main(int argc, char **argv) -{ -#ifndef DOS_OS2_W32 - FILE *keybd; -#endif -#ifdef sgi - FILE *tmpfile; /* or we could just use keybd, since no overlap */ - char tmpline[80]; -#endif - char *inname = NULL, outname[256]; - char *p, pnmchar, pnmline[256]; - char *bgstr, *textbuf = NULL; - ulg rowbytes; - int rc, len = 0; - int error = 0; - int text = FALSE; - int maxval; - double LUT_exponent; /* just the lookup table */ - double CRT_exponent = 2.2; /* just the monitor */ - double default_display_exponent; /* whole display system */ - double default_gamma = 0.0; - - - wpng_info.infile = NULL; - wpng_info.outfile = NULL; - wpng_info.image_data = NULL; - wpng_info.row_pointers = NULL; - wpng_info.filter = FALSE; - wpng_info.interlaced = FALSE; - wpng_info.have_bg = FALSE; - wpng_info.have_time = FALSE; - wpng_info.have_text = 0; - wpng_info.gamma = 0.0; - - - /* First get the default value for our display-system exponent, i.e., - * the product of the CRT exponent and the exponent corresponding to - * the frame-buffer's lookup table (LUT), if any. If the PNM image - * looks correct on the user's display system, its file gamma is the - * inverse of this value. (Note that this is not an exhaustive list - * of LUT values--e.g., OpenStep has a lot of weird ones--but it should - * cover 99% of the current possibilities. This section must ensure - * that default_display_exponent is positive.) */ - -#if defined(NeXT) - /* third-party utilities can modify the default LUT exponent */ - LUT_exponent = 1.0 / 2.2; - /* - if (some_next_function_that_returns_gamma(&next_gamma)) - LUT_exponent = 1.0 / next_gamma; - */ -#elif defined(sgi) - LUT_exponent = 1.0 / 1.7; - /* there doesn't seem to be any documented function to - * get the "gamma" value, so we do it the hard way */ - tmpfile = fopen("/etc/config/system.glGammaVal", "r"); - if (tmpfile) { - double sgi_gamma; - - fgets(tmpline, 80, tmpfile); - fclose(tmpfile); - sgi_gamma = atof(tmpline); - if (sgi_gamma > 0.0) - LUT_exponent = 1.0 / sgi_gamma; - } -#elif defined(Macintosh) - LUT_exponent = 1.8 / 2.61; - /* - if (some_mac_function_that_returns_gamma(&mac_gamma)) - LUT_exponent = mac_gamma / 2.61; - */ -#else - LUT_exponent = 1.0; /* assume no LUT: most PCs */ -#endif - - /* the defaults above give 1.0, 1.3, 1.5 and 2.2, respectively: */ - default_display_exponent = LUT_exponent * CRT_exponent; - - - /* If the user has set the SCREEN_GAMMA environment variable as suggested - * (somewhat imprecisely) in the libpng documentation, use that; otherwise - * use the default value we just calculated. Either way, the user may - * override this via a command-line option. */ - - if ((p = getenv("SCREEN_GAMMA")) != NULL) { - double exponent = atof(p); - - if (exponent > 0.0) - default_gamma = 1.0 / exponent; - } - - if (default_gamma == 0.0) - default_gamma = 1.0 / default_display_exponent; - - - /* Now parse the command line for options and the PNM filename. */ - - while (*++argv && !error) { - if (!strncmp(*argv, "-i", 2)) { - wpng_info.interlaced = TRUE; - } else if (!strncmp(*argv, "-time", 3)) { - wpng_info.modtime = time(NULL); - wpng_info.have_time = TRUE; - } else if (!strncmp(*argv, "-text", 3)) { - text = TRUE; - } else if (!strncmp(*argv, "-gamma", 2)) { - if (!*++argv) - ++error; - else { - wpng_info.gamma = atof(*argv); - if (wpng_info.gamma <= 0.0) - ++error; - else if (wpng_info.gamma > 1.01) - fprintf(stderr, PROGNAME - " warning: file gammas are usually less than 1.0\n"); - } - } else if (!strncmp(*argv, "-bgcolor", 4)) { - if (!*++argv) - ++error; - else { - bgstr = *argv; - if (strlen(bgstr) != 7 || bgstr[0] != '#') - ++error; - else { - unsigned r, g, b; /* this way quiets compiler warnings */ - - sscanf(bgstr+1, "%2x%2x%2x", &r, &g, &b); - wpng_info.bg_red = (uch)r; - wpng_info.bg_green = (uch)g; - wpng_info.bg_blue = (uch)b; - wpng_info.have_bg = TRUE; - } - } - } else { - if (**argv != '-') { - inname = *argv; - if (argv[1]) /* shouldn't be any more args after filename */ - ++error; - } else - ++error; /* not expecting any other options */ - } - } - - - /* open the input and output files, or register an error and abort */ - - if (!inname) { - if (isatty(0)) { - fprintf(stderr, PROGNAME - ": must give input filename or provide image data via stdin\n"); - ++error; - } else { -#ifdef DOS_OS2_W32 - /* some buggy C libraries require BOTH setmode() and fdopen(bin) */ - setmode(fileno(stdin), O_BINARY); - setmode(fileno(stdout), O_BINARY); -#endif - if ((wpng_info.infile = fdopen(fileno(stdin), "rb")) == NULL) { - fprintf(stderr, PROGNAME - ": unable to reopen stdin in binary mode\n"); - ++error; - } else - if ((wpng_info.outfile = fdopen(fileno(stdout), "wb")) == NULL) { - fprintf(stderr, PROGNAME - ": unable to reopen stdout in binary mode\n"); - fclose(wpng_info.infile); - ++error; - } else - wpng_info.filter = TRUE; - } - } else if ((len = strlen(inname)) > 250) { - fprintf(stderr, PROGNAME ": input filename is too long [%d chars]\n", - len); - ++error; - } else if (!(wpng_info.infile = fopen(inname, "rb"))) { - fprintf(stderr, PROGNAME ": can't open input file [%s]\n", inname); - ++error; - } - - if (!error) { - fgets(pnmline, 256, wpng_info.infile); - if (pnmline[0] != 'P' || ((pnmchar = pnmline[1]) != '5' && - pnmchar != '6' && pnmchar != '8')) - { - fprintf(stderr, PROGNAME - ": input file [%s] is not a binary PGM, PPM or PAM file\n", - inname); - ++error; - } else { - wpng_info.pnmtype = (int)(pnmchar - '0'); - if (wpng_info.pnmtype != 8) - wpng_info.have_bg = FALSE; /* no need for bg if opaque */ - do { - fgets(pnmline, 256, wpng_info.infile); /* lose any comments */ - } while (pnmline[0] == '#'); - sscanf(pnmline, "%ld %ld", &wpng_info.width, &wpng_info.height); - do { - fgets(pnmline, 256, wpng_info.infile); /* more comment lines */ - } while (pnmline[0] == '#'); - sscanf(pnmline, "%d", &maxval); - if (wpng_info.width <= 0L || wpng_info.height <= 0L || - maxval != 255) - { - fprintf(stderr, PROGNAME - ": only positive width/height, maxval == 255 allowed \n"); - ++error; - } - wpng_info.sample_depth = 8; /* <==> maxval 255 */ - - if (!wpng_info.filter) { - /* make outname from inname */ - if ((p = strrchr(inname, '.')) == NULL || - (p - inname) != (len - 4)) - { - strcpy(outname, inname); - strcpy(outname+len, ".png"); - } else { - len -= 4; - strncpy(outname, inname, len); - strcpy(outname+len, ".png"); - } - /* check if outname already exists; if not, open */ - if ((wpng_info.outfile = fopen(outname, "rb")) != NULL) { - fprintf(stderr, PROGNAME ": output file exists [%s]\n", - outname); - fclose(wpng_info.outfile); - ++error; - } else if (!(wpng_info.outfile = fopen(outname, "wb"))) { - fprintf(stderr, PROGNAME ": can't open output file [%s]\n", - outname); - ++error; - } - } - } - if (error) { - fclose(wpng_info.infile); - wpng_info.infile = NULL; - if (wpng_info.filter) { - fclose(wpng_info.outfile); - wpng_info.outfile = NULL; - } - } - } - - - /* if we had any errors, print usage and die horrible death...arrr! */ - - if (error) { - fprintf(stderr, "\n%s %s: %s\n", PROGNAME, VERSION, APPNAME); - writepng_version_info(); - fprintf(stderr, "\n" -"Usage: %s [-gamma exp] [-bgcolor bg] [-text] [-time] [-interlace] pnmfile\n" -"or: ... | %s [-gamma exp] [-bgcolor bg] [-text] [-time] [-interlace] | ...\n" - " exp \ttransfer-function exponent (``gamma'') of the image in\n" - "\t\t floating-point format (e.g., ``%.5f''); if image looks\n" - "\t\t correct on given display system, image gamma is equal to\n" - "\t\t inverse of display-system exponent, i.e., 1 / (LUT * CRT)\n" - "\t\t (where LUT = lookup-table exponent and CRT = CRT exponent;\n" - "\t\t first varies, second is usually 2.2, all are positive)\n" - " bg \tdesired background color for alpha-channel images, in\n" - "\t\t 7-character hex RGB format (e.g., ``#ff7700'' for orange:\n" - "\t\t same as HTML colors)\n" - " -text\tprompt interactively for text info (tEXt chunks)\n" - " -time\tinclude a tIME chunk (last modification time)\n" - " -interlace\twrite interlaced PNG image\n" - "\n" -"pnmfile or stdin must be a binary PGM (`P5'), PPM (`P6') or (extremely\n" -"unofficial and unsupported!) PAM (`P8') file. Currently it is required\n" -"to have maxval == 255 (i.e., no scaling). If pnmfile is specified, it\n" -"is converted to the corresponding PNG file with the same base name but a\n" -"``.png'' extension; files read from stdin are converted and sent to stdout.\n" -"The conversion is progressive (low memory usage) unless interlacing is\n" -"requested; in that case the whole image will be buffered in memory and\n" -"written in one call.\n" - "\n", PROGNAME, PROGNAME, default_gamma); - exit(1); - } - - - /* prepare the text buffers for libpng's use; note that even though - * PNG's png_text struct includes a length field, we don't have to fill - * it out */ - - if (text && -#ifndef DOS_OS2_W32 - (keybd = fdopen(fileno(stderr), "r")) != NULL && -#endif - (textbuf = (char *)malloc((5 + 9)*75)) != NULL) - { - int i, valid, result; - - fprintf(stderr, - "Enter text info (no more than 72 characters per line);\n"); - fprintf(stderr, "to skip a field, hit the key.\n"); - /* note: just leaves len == 1 */ - - do { - valid = TRUE; - p = textbuf + TEXT_TITLE_OFFSET; - fprintf(stderr, " Title: "); - fflush(stderr); - if (FGETS(p, 74, keybd) && (len = strlen(p)) > 1) { - if (p[len-1] == '\n') - p[--len] = '\0'; - wpng_info.title = p; - wpng_info.have_text |= TEXT_TITLE; - if ((result = wpng_isvalid_latin1((uch *)p, len)) >= 0) { - fprintf(stderr, " " PROGNAME " warning: character code" - " %u is %sdiscouraged by the PNG\n specification " - "[first occurrence was at character position #%d]\n", - (unsigned)p[result], (p[result] == 27)? "strongly " : "", - result+1); - fflush(stderr); -#ifdef FORBID_LATIN1_CTRL - wpng_info.have_text &= ~TEXT_TITLE; - valid = FALSE; -#else - if (p[result] == 27) { /* escape character */ - wpng_info.have_text &= ~TEXT_TITLE; - valid = FALSE; - } -#endif - } - } - } while (!valid); - - do { - valid = TRUE; - p = textbuf + TEXT_AUTHOR_OFFSET; - fprintf(stderr, " Author: "); - fflush(stderr); - if (FGETS(p, 74, keybd) && (len = strlen(p)) > 1) { - if (p[len-1] == '\n') - p[--len] = '\0'; - wpng_info.author = p; - wpng_info.have_text |= TEXT_AUTHOR; - if ((result = wpng_isvalid_latin1((uch *)p, len)) >= 0) { - fprintf(stderr, " " PROGNAME " warning: character code" - " %u is %sdiscouraged by the PNG\n specification " - "[first occurrence was at character position #%d]\n", - (unsigned)p[result], (p[result] == 27)? "strongly " : "", - result+1); - fflush(stderr); -#ifdef FORBID_LATIN1_CTRL - wpng_info.have_text &= ~TEXT_AUTHOR; - valid = FALSE; -#else - if (p[result] == 27) { /* escape character */ - wpng_info.have_text &= ~TEXT_AUTHOR; - valid = FALSE; - } -#endif - } - } - } while (!valid); - - do { - valid = TRUE; - p = textbuf + TEXT_DESC_OFFSET; - fprintf(stderr, " Description (up to 9 lines):\n"); - for (i = 1; i < 10; ++i) { - fprintf(stderr, " [%d] ", i); - fflush(stderr); - if (FGETS(p, 74, keybd) && (len = strlen(p)) > 1) - p += len; /* now points at NULL; char before is newline */ - else - break; - } - if ((len = p - (textbuf + TEXT_DESC_OFFSET)) > 1) { - if (p[-1] == '\n') { - p[-1] = '\0'; - --len; - } - wpng_info.desc = textbuf + TEXT_DESC_OFFSET; - wpng_info.have_text |= TEXT_DESC; - p = textbuf + TEXT_DESC_OFFSET; - if ((result = wpng_isvalid_latin1((uch *)p, len)) >= 0) { - fprintf(stderr, " " PROGNAME " warning: character code" - " %u is %sdiscouraged by the PNG\n specification " - "[first occurrence was at character position #%d]\n", - (unsigned)p[result], (p[result] == 27)? "strongly " : "", - result+1); - fflush(stderr); -#ifdef FORBID_LATIN1_CTRL - wpng_info.have_text &= ~TEXT_DESC; - valid = FALSE; -#else - if (p[result] == 27) { /* escape character */ - wpng_info.have_text &= ~TEXT_DESC; - valid = FALSE; - } -#endif - } - } - } while (!valid); - - do { - valid = TRUE; - p = textbuf + TEXT_COPY_OFFSET; - fprintf(stderr, " Copyright: "); - fflush(stderr); - if (FGETS(p, 74, keybd) && (len = strlen(p)) > 1) { - if (p[len-1] == '\n') - p[--len] = '\0'; - wpng_info.copyright = p; - wpng_info.have_text |= TEXT_COPY; - if ((result = wpng_isvalid_latin1((uch *)p, len)) >= 0) { - fprintf(stderr, " " PROGNAME " warning: character code" - " %u is %sdiscouraged by the PNG\n specification " - "[first occurrence was at character position #%d]\n", - (unsigned)p[result], (p[result] == 27)? "strongly " : "", - result+1); - fflush(stderr); -#ifdef FORBID_LATIN1_CTRL - wpng_info.have_text &= ~TEXT_COPY; - valid = FALSE; -#else - if (p[result] == 27) { /* escape character */ - wpng_info.have_text &= ~TEXT_COPY; - valid = FALSE; - } -#endif - } - } - } while (!valid); - - do { - valid = TRUE; - p = textbuf + TEXT_EMAIL_OFFSET; - fprintf(stderr, " E-mail: "); - fflush(stderr); - if (FGETS(p, 74, keybd) && (len = strlen(p)) > 1) { - if (p[len-1] == '\n') - p[--len] = '\0'; - wpng_info.email = p; - wpng_info.have_text |= TEXT_EMAIL; - if ((result = wpng_isvalid_latin1((uch *)p, len)) >= 0) { - fprintf(stderr, " " PROGNAME " warning: character code" - " %u is %sdiscouraged by the PNG\n specification " - "[first occurrence was at character position #%d]\n", - (unsigned)p[result], (p[result] == 27)? "strongly " : "", - result+1); - fflush(stderr); -#ifdef FORBID_LATIN1_CTRL - wpng_info.have_text &= ~TEXT_EMAIL; - valid = FALSE; -#else - if (p[result] == 27) { /* escape character */ - wpng_info.have_text &= ~TEXT_EMAIL; - valid = FALSE; - } -#endif - } - } - } while (!valid); - - do { - valid = TRUE; - p = textbuf + TEXT_URL_OFFSET; - fprintf(stderr, " URL: "); - fflush(stderr); - if (FGETS(p, 74, keybd) && (len = strlen(p)) > 1) { - if (p[len-1] == '\n') - p[--len] = '\0'; - wpng_info.url = p; - wpng_info.have_text |= TEXT_URL; - if ((result = wpng_isvalid_latin1((uch *)p, len)) >= 0) { - fprintf(stderr, " " PROGNAME " warning: character code" - " %u is %sdiscouraged by the PNG\n specification " - "[first occurrence was at character position #%d]\n", - (unsigned)p[result], (p[result] == 27)? "strongly " : "", - result+1); - fflush(stderr); -#ifdef FORBID_LATIN1_CTRL - wpng_info.have_text &= ~TEXT_URL; - valid = FALSE; -#else - if (p[result] == 27) { /* escape character */ - wpng_info.have_text &= ~TEXT_URL; - valid = FALSE; - } -#endif - } - } - } while (!valid); - -#ifndef DOS_OS2_W32 - fclose(keybd); -#endif - - } else if (text) { - fprintf(stderr, PROGNAME ": unable to allocate memory for text\n"); - text = FALSE; - wpng_info.have_text = 0; - } - - - /* allocate libpng stuff, initialize transformations, write pre-IDAT data */ - - if ((rc = writepng_init(&wpng_info)) != 0) { - switch (rc) { - case 2: - fprintf(stderr, PROGNAME - ": libpng initialization problem (longjmp)\n"); - break; - case 4: - fprintf(stderr, PROGNAME ": insufficient memory\n"); - break; - case 11: - fprintf(stderr, PROGNAME - ": internal logic error (unexpected PNM type)\n"); - break; - default: - fprintf(stderr, PROGNAME - ": unknown writepng_init() error\n"); - break; - } - exit(rc); - } - - - /* free textbuf, since it's a completely local variable and all text info - * has just been written to the PNG file */ - - if (text && textbuf) { - free(textbuf); - textbuf = NULL; - } - - - /* calculate rowbytes on basis of image type; note that this becomes much - * more complicated if we choose to support PBM type, ASCII PNM types, or - * 16-bit-per-sample binary data [currently not an official NetPBM type] */ - - if (wpng_info.pnmtype == 5) - rowbytes = wpng_info.width; - else if (wpng_info.pnmtype == 6) - rowbytes = wpng_info.width * 3; - else /* if (wpng_info.pnmtype == 8) */ - rowbytes = wpng_info.width * 4; - - - /* read and write the image, either in its entirety (if writing interlaced - * PNG) or row by row (if non-interlaced) */ - - fprintf(stderr, "Encoding image data...\n"); - fflush(stderr); - - if (wpng_info.interlaced) { - long i; - ulg bytes; - ulg image_bytes; - - /* Guard against integer overflow */ - if (wpng_info_height > ((size_t)(-1)/rowbytes || - wpng_info_height > ((ulg)(-1)/rowbytes) { - fprintf(stderr, PROGNAME ": image_data buffer too large\n"); - writepng_cleanup(&wpng_info); - wpng_cleanup(); - exit(5); - } - - image_bytes = rowbytes * wpng_info.height; - - wpng_info.image_data = (uch *)malloc(image_bytes); - wpng_info.row_pointers = (uch **)malloc(wpng_info.height*sizeof(uch *)); - if (wpng_info.image_data == NULL || wpng_info.row_pointers == NULL) { - fprintf(stderr, PROGNAME ": insufficient memory for image data\n"); - writepng_cleanup(&wpng_info); - wpng_cleanup(); - exit(5); - } - for (i = 0; i < wpng_info.height; ++i) - wpng_info.row_pointers[i] = wpng_info.image_data + i*rowbytes; - bytes = fread(wpng_info.image_data, 1, image_bytes, wpng_info.infile); - if (bytes != image_bytes) { - fprintf(stderr, PROGNAME ": expected %lu bytes, got %lu bytes\n", - image_bytes, bytes); - fprintf(stderr, " (continuing anyway)\n"); - } - if (writepng_encode_image(&wpng_info) != 0) { - fprintf(stderr, PROGNAME - ": libpng problem (longjmp) while writing image data\n"); - writepng_cleanup(&wpng_info); - wpng_cleanup(); - exit(2); - } - - } else /* not interlaced: write progressively (row by row) */ { - long j; - ulg bytes; - - wpng_info.image_data = (uch *)malloc(rowbytes); - if (wpng_info.image_data == NULL) { - fprintf(stderr, PROGNAME ": insufficient memory for row data\n"); - writepng_cleanup(&wpng_info); - wpng_cleanup(); - exit(5); - } - error = 0; - for (j = wpng_info.height; j > 0L; --j) { - bytes = fread(wpng_info.image_data, 1, rowbytes, wpng_info.infile); - if (bytes != rowbytes) { - fprintf(stderr, PROGNAME - ": expected %lu bytes, got %lu bytes (row %ld)\n", rowbytes, - bytes, wpng_info.height-j); - ++error; - break; - } - if (writepng_encode_row(&wpng_info) != 0) { - fprintf(stderr, PROGNAME - ": libpng problem (longjmp) while writing row %ld\n", - wpng_info.height-j); - ++error; - break; - } - } - if (error) { - writepng_cleanup(&wpng_info); - wpng_cleanup(); - exit(2); - } - if (writepng_encode_finish(&wpng_info) != 0) { - fprintf(stderr, PROGNAME ": error on final libpng call\n"); - writepng_cleanup(&wpng_info); - wpng_cleanup(); - exit(2); - } - } - - - /* OK, we're done (successfully): clean up all resources and quit */ - - fprintf(stderr, "Done.\n"); - fflush(stderr); - - writepng_cleanup(&wpng_info); - wpng_cleanup(); - - return 0; -} - - - - - -static int wpng_isvalid_latin1(uch *p, int len) -{ - int i, result = -1; - - for (i = 0; i < len; ++i) { - if (p[i] == 10 || (p[i] > 31 && p[i] < 127) || p[i] > 160) - continue; /* character is completely OK */ - if (result < 0 || (p[result] != 27 && p[i] == 27)) - result = i; /* mark location of first questionable one */ - } /* or of first escape character (bad) */ - - return result; -} - - - - - -static void wpng_cleanup(void) -{ - if (wpng_info.outfile) { - fclose(wpng_info.outfile); - wpng_info.outfile = NULL; - } - - if (wpng_info.infile) { - fclose(wpng_info.infile); - wpng_info.infile = NULL; - } - - if (wpng_info.image_data) { - free(wpng_info.image_data); - wpng_info.image_data = NULL; - } - - if (wpng_info.row_pointers) { - free(wpng_info.row_pointers); - wpng_info.row_pointers = NULL; - } -} - - - - -#ifdef DOS_OS2_W32 - -static char *dos_kbd_gets(char *buf, int len) -{ - int ch, count=0; - - do { - buf[count++] = ch = getche(); - } while (ch != '\r' && count < len-1); - - buf[count--] = '\0'; /* terminate string */ - if (buf[count] == '\r') /* Enter key makes CR, so change to newline */ - buf[count] = '\n'; - - fprintf(stderr, "\n"); /* Enter key does *not* cause a newline */ - fflush(stderr); - - return buf; -} - -#endif /* DOS_OS2_W32 */ diff --git a/lib/libpng-1.6.37/contrib/gregbook/writepng.c b/lib/libpng-1.6.37/contrib/gregbook/writepng.c deleted file mode 100644 index 055c743..0000000 --- a/lib/libpng-1.6.37/contrib/gregbook/writepng.c +++ /dev/null @@ -1,401 +0,0 @@ -/*--------------------------------------------------------------------------- - - wpng - simple PNG-writing program writepng.c - - --------------------------------------------------------------------------- - - Copyright (c) 1998-2007, 2017 Greg Roelofs. All rights reserved. - - This software is provided "as is," without warranty of any kind, - express or implied. In no event shall the author or contributors - be held liable for any damages arising in any way from the use of - this software. - - The contents of this file are DUAL-LICENSED. You may modify and/or - redistribute this software according to the terms of one of the - following two licenses (at your option): - - - LICENSE 1 ("BSD-like with advertising clause"): - - Permission is granted to anyone to use this software for any purpose, - including commercial applications, and to alter it and redistribute - it freely, subject to the following restrictions: - - 1. Redistributions of source code must retain the above copyright - notice, disclaimer, and this list of conditions. - 2. Redistributions in binary form must reproduce the above copyright - notice, disclaimer, and this list of conditions in the documenta- - tion and/or other materials provided with the distribution. - 3. All advertising materials mentioning features or use of this - software must display the following acknowledgment: - - This product includes software developed by Greg Roelofs - and contributors for the book, "PNG: The Definitive Guide," - published by O'Reilly and Associates. - - - LICENSE 2 (GNU GPL v2 or later): - - This program is free software; you can redistribute it and/or modify - it under the terms of the GNU General Public License as published by - the Free Software Foundation; either version 2 of the License, or - (at your option) any later version. - - This program is distributed in the hope that it will be useful, - but WITHOUT ANY WARRANTY; without even the implied warranty of - MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - GNU General Public License for more details. - - You should have received a copy of the GNU General Public License - along with this program; if not, write to the Free Software Foundation, - Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA - - ---------------------------------------------------------------------------*/ - - -#include /* for exit() prototype */ -#include - -#include "png.h" /* libpng header, includes setjmp.h */ -#include "writepng.h" /* typedefs, common macros, public prototypes */ - - -/* local prototype */ - -static void writepng_error_handler(png_structp png_ptr, png_const_charp msg); - - - -void writepng_version_info(void) -{ - fprintf(stderr, " Compiled with libpng %s; using libpng %s.\n", - PNG_LIBPNG_VER_STRING, png_libpng_ver); - fprintf(stderr, " Compiled with zlib %s; using zlib %s.\n", - ZLIB_VERSION, zlib_version); -} - - - - -/* returns 0 for success, 2 for libpng problem, 4 for out of memory, 11 for - * unexpected pnmtype; note that outfile might be stdout */ - -int writepng_init(mainprog_info *mainprog_ptr) -{ - png_structp png_ptr; /* note: temporary variables! */ - png_infop info_ptr; - int color_type, interlace_type; - - - /* could also replace libpng warning-handler (final NULL), but no need: */ - - png_ptr = png_create_write_struct(png_get_libpng_ver(NULL), mainprog_ptr, - writepng_error_handler, NULL); - if (!png_ptr) - return 4; /* out of memory */ - - info_ptr = png_create_info_struct(png_ptr); - if (!info_ptr) { - png_destroy_write_struct(&png_ptr, NULL); - return 4; /* out of memory */ - } - - - /* setjmp() must be called in every function that calls a PNG-writing - * libpng function, unless an alternate error handler was installed-- - * but compatible error handlers must either use longjmp() themselves - * (as in this program) or some other method to return control to - * application code, so here we go: */ - - if (setjmp(mainprog_ptr->jmpbuf)) { - png_destroy_write_struct(&png_ptr, &info_ptr); - return 2; - } - - - /* make sure outfile is (re)opened in BINARY mode */ - - png_init_io(png_ptr, mainprog_ptr->outfile); - - - /* set the compression levels--in general, always want to leave filtering - * turned on (except for palette images) and allow all of the filters, - * which is the default; want 32K zlib window, unless entire image buffer - * is 16K or smaller (unknown here)--also the default; usually want max - * compression (NOT the default); and remaining compression flags should - * be left alone */ - - png_set_compression_level(png_ptr, Z_BEST_COMPRESSION); -/* - >> this is default for no filtering; Z_FILTERED is default otherwise: - png_set_compression_strategy(png_ptr, Z_DEFAULT_STRATEGY); - >> these are all defaults: - png_set_compression_mem_level(png_ptr, 8); - png_set_compression_window_bits(png_ptr, 15); - png_set_compression_method(png_ptr, 8); - */ - - - /* set the image parameters appropriately */ - - if (mainprog_ptr->pnmtype == 5) - color_type = PNG_COLOR_TYPE_GRAY; - else if (mainprog_ptr->pnmtype == 6) - color_type = PNG_COLOR_TYPE_RGB; - else if (mainprog_ptr->pnmtype == 8) - color_type = PNG_COLOR_TYPE_RGB_ALPHA; - else { - png_destroy_write_struct(&png_ptr, &info_ptr); - return 11; - } - - interlace_type = mainprog_ptr->interlaced? PNG_INTERLACE_ADAM7 : - PNG_INTERLACE_NONE; - - png_set_IHDR(png_ptr, info_ptr, mainprog_ptr->width, mainprog_ptr->height, - mainprog_ptr->sample_depth, color_type, interlace_type, - PNG_COMPRESSION_TYPE_DEFAULT, PNG_FILTER_TYPE_DEFAULT); - - if (mainprog_ptr->gamma > 0.0) - png_set_gAMA(png_ptr, info_ptr, mainprog_ptr->gamma); - - if (mainprog_ptr->have_bg) { /* we know it's RGBA, not gray+alpha */ - png_color_16 background; - - background.red = mainprog_ptr->bg_red; - background.green = mainprog_ptr->bg_green; - background.blue = mainprog_ptr->bg_blue; - png_set_bKGD(png_ptr, info_ptr, &background); - } - - if (mainprog_ptr->have_time) { - png_time modtime; - - png_convert_from_time_t(&modtime, mainprog_ptr->modtime); - png_set_tIME(png_ptr, info_ptr, &modtime); - } - - if (mainprog_ptr->have_text) { - png_text text[6]; - int num_text = 0; - - if (mainprog_ptr->have_text & TEXT_TITLE) { - text[num_text].compression = PNG_TEXT_COMPRESSION_NONE; - text[num_text].key = "Title"; - text[num_text].text = mainprog_ptr->title; - ++num_text; - } - if (mainprog_ptr->have_text & TEXT_AUTHOR) { - text[num_text].compression = PNG_TEXT_COMPRESSION_NONE; - text[num_text].key = "Author"; - text[num_text].text = mainprog_ptr->author; - ++num_text; - } - if (mainprog_ptr->have_text & TEXT_DESC) { - text[num_text].compression = PNG_TEXT_COMPRESSION_NONE; - text[num_text].key = "Description"; - text[num_text].text = mainprog_ptr->desc; - ++num_text; - } - if (mainprog_ptr->have_text & TEXT_COPY) { - text[num_text].compression = PNG_TEXT_COMPRESSION_NONE; - text[num_text].key = "Copyright"; - text[num_text].text = mainprog_ptr->copyright; - ++num_text; - } - if (mainprog_ptr->have_text & TEXT_EMAIL) { - text[num_text].compression = PNG_TEXT_COMPRESSION_NONE; - text[num_text].key = "E-mail"; - text[num_text].text = mainprog_ptr->email; - ++num_text; - } - if (mainprog_ptr->have_text & TEXT_URL) { - text[num_text].compression = PNG_TEXT_COMPRESSION_NONE; - text[num_text].key = "URL"; - text[num_text].text = mainprog_ptr->url; - ++num_text; - } - png_set_text(png_ptr, info_ptr, text, num_text); - } - - - /* write all chunks up to (but not including) first IDAT */ - - png_write_info(png_ptr, info_ptr); - - - /* if we wanted to write any more text info *after* the image data, we - * would set up text struct(s) here and call png_set_text() again, with - * just the new data; png_set_tIME() could also go here, but it would - * have no effect since we already called it above (only one tIME chunk - * allowed) */ - - - /* set up the transformations: for now, just pack low-bit-depth pixels - * into bytes (one, two or four pixels per byte) */ - - png_set_packing(png_ptr); -/* png_set_shift(png_ptr, &sig_bit); to scale low-bit-depth values */ - - - /* make sure we save our pointers for use in writepng_encode_image() */ - - mainprog_ptr->png_ptr = png_ptr; - mainprog_ptr->info_ptr = info_ptr; - - - /* OK, that's all we need to do for now; return happy */ - - return 0; -} - - - - - -/* returns 0 for success, 2 for libpng (longjmp) problem */ - -int writepng_encode_image(mainprog_info *mainprog_ptr) -{ - png_structp png_ptr = (png_structp)mainprog_ptr->png_ptr; - png_infop info_ptr = (png_infop)mainprog_ptr->info_ptr; - - - /* as always, setjmp() must be called in every function that calls a - * PNG-writing libpng function */ - - if (setjmp(mainprog_ptr->jmpbuf)) { - png_destroy_write_struct(&png_ptr, &info_ptr); - mainprog_ptr->png_ptr = NULL; - mainprog_ptr->info_ptr = NULL; - return 2; - } - - - /* and now we just write the whole image; libpng takes care of interlacing - * for us */ - - png_write_image(png_ptr, mainprog_ptr->row_pointers); - - - /* since that's it, we also close out the end of the PNG file now--if we - * had any text or time info to write after the IDATs, second argument - * would be info_ptr, but we optimize slightly by sending NULL pointer: */ - - png_write_end(png_ptr, NULL); - - return 0; -} - - - - - -/* returns 0 if succeeds, 2 if libpng problem */ - -int writepng_encode_row(mainprog_info *mainprog_ptr) /* NON-interlaced only! */ -{ - png_structp png_ptr = (png_structp)mainprog_ptr->png_ptr; - png_infop info_ptr = (png_infop)mainprog_ptr->info_ptr; - - - /* as always, setjmp() must be called in every function that calls a - * PNG-writing libpng function */ - - if (setjmp(mainprog_ptr->jmpbuf)) { - png_destroy_write_struct(&png_ptr, &info_ptr); - mainprog_ptr->png_ptr = NULL; - mainprog_ptr->info_ptr = NULL; - return 2; - } - - - /* image_data points at our one row of image data */ - - png_write_row(png_ptr, mainprog_ptr->image_data); - - return 0; -} - - - - - -/* returns 0 if succeeds, 2 if libpng problem */ - -int writepng_encode_finish(mainprog_info *mainprog_ptr) /* NON-interlaced! */ -{ - png_structp png_ptr = (png_structp)mainprog_ptr->png_ptr; - png_infop info_ptr = (png_infop)mainprog_ptr->info_ptr; - - - /* as always, setjmp() must be called in every function that calls a - * PNG-writing libpng function */ - - if (setjmp(mainprog_ptr->jmpbuf)) { - png_destroy_write_struct(&png_ptr, &info_ptr); - mainprog_ptr->png_ptr = NULL; - mainprog_ptr->info_ptr = NULL; - return 2; - } - - - /* close out PNG file; if we had any text or time info to write after - * the IDATs, second argument would be info_ptr: */ - - png_write_end(png_ptr, NULL); - - return 0; -} - - - - - -void writepng_cleanup(mainprog_info *mainprog_ptr) -{ - png_structp png_ptr = (png_structp)mainprog_ptr->png_ptr; - png_infop info_ptr = (png_infop)mainprog_ptr->info_ptr; - - if (png_ptr && info_ptr) - png_destroy_write_struct(&png_ptr, &info_ptr); -} - - - - - -static void writepng_error_handler(png_structp png_ptr, png_const_charp msg) -{ - mainprog_info *mainprog_ptr; - - /* This function, aside from the extra step of retrieving the "error - * pointer" (below) and the fact that it exists within the application - * rather than within libpng, is essentially identical to libpng's - * default error handler. The second point is critical: since both - * setjmp() and longjmp() are called from the same code, they are - * guaranteed to have compatible notions of how big a jmp_buf is, - * regardless of whether _BSD_SOURCE or anything else has (or has not) - * been defined. */ - - fprintf(stderr, "writepng libpng error: %s\n", msg); - fflush(stderr); - - mainprog_ptr = png_get_error_ptr(png_ptr); - if (mainprog_ptr == NULL) { /* we are completely hosed now */ - fprintf(stderr, - "writepng severe error: jmpbuf not recoverable; terminating.\n"); - fflush(stderr); - exit(99); - } - - /* Now we have our data structure we can use the information in it - * to return control to our own higher level code (all the points - * where 'setjmp' is called in this file.) This will work with other - * error handling mechanisms as well - libpng always calls png_error - * when it can proceed no further, thus, so long as the error handler - * is intercepted, application code can do its own error recovery. - */ - longjmp(mainprog_ptr->jmpbuf, 1); -} diff --git a/lib/libpng-1.6.37/contrib/gregbook/writepng.h b/lib/libpng-1.6.37/contrib/gregbook/writepng.h deleted file mode 100644 index 78b966b..0000000 --- a/lib/libpng-1.6.37/contrib/gregbook/writepng.h +++ /dev/null @@ -1,133 +0,0 @@ -/*--------------------------------------------------------------------------- - - wpng - simple PNG-writing program writepng.h - - --------------------------------------------------------------------------- - - Copyright (c) 1998-2007 Greg Roelofs. All rights reserved. - - This software is provided "as is," without warranty of any kind, - express or implied. In no event shall the author or contributors - be held liable for any damages arising in any way from the use of - this software. - - The contents of this file are DUAL-LICENSED. You may modify and/or - redistribute this software according to the terms of one of the - following two licenses (at your option): - - - LICENSE 1 ("BSD-like with advertising clause"): - - Permission is granted to anyone to use this software for any purpose, - including commercial applications, and to alter it and redistribute - it freely, subject to the following restrictions: - - 1. Redistributions of source code must retain the above copyright - notice, disclaimer, and this list of conditions. - 2. Redistributions in binary form must reproduce the above copyright - notice, disclaimer, and this list of conditions in the documenta- - tion and/or other materials provided with the distribution. - 3. All advertising materials mentioning features or use of this - software must display the following acknowledgment: - - This product includes software developed by Greg Roelofs - and contributors for the book, "PNG: The Definitive Guide," - published by O'Reilly and Associates. - - - LICENSE 2 (GNU GPL v2 or later): - - This program is free software; you can redistribute it and/or modify - it under the terms of the GNU General Public License as published by - the Free Software Foundation; either version 2 of the License, or - (at your option) any later version. - - This program is distributed in the hope that it will be useful, - but WITHOUT ANY WARRANTY; without even the implied warranty of - MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - GNU General Public License for more details. - - You should have received a copy of the GNU General Public License - along with this program; if not, write to the Free Software Foundation, - Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA - - ---------------------------------------------------------------------------*/ - -#ifndef TRUE -# define TRUE 1 -# define FALSE 0 -#endif - -#ifndef MAX -# define MAX(a,b) ((a) > (b)? (a) : (b)) -# define MIN(a,b) ((a) < (b)? (a) : (b)) -#endif - -#ifdef DEBUG -# define Trace(x) {fprintf x ; fflush(stderr); fflush(stdout);} -#else -# define Trace(x) ; -#endif - -#define TEXT_TITLE 0x01 -#define TEXT_AUTHOR 0x02 -#define TEXT_DESC 0x04 -#define TEXT_COPY 0x08 -#define TEXT_EMAIL 0x10 -#define TEXT_URL 0x20 - -#define TEXT_TITLE_OFFSET 0 -#define TEXT_AUTHOR_OFFSET 72 -#define TEXT_COPY_OFFSET (2*72) -#define TEXT_EMAIL_OFFSET (3*72) -#define TEXT_URL_OFFSET (4*72) -#define TEXT_DESC_OFFSET (5*72) - -typedef unsigned char uch; -typedef unsigned short ush; -typedef unsigned long ulg; - -typedef struct _mainprog_info { - double gamma; - long width; - long height; - time_t modtime; - FILE *infile; - FILE *outfile; - void *png_ptr; - void *info_ptr; - uch *image_data; - uch **row_pointers; - char *title; - char *author; - char *desc; - char *copyright; - char *email; - char *url; - int filter; /* command-line-filter flag, not PNG row filter! */ - int pnmtype; - int sample_depth; - int interlaced; - int have_bg; - int have_time; - int have_text; - jmp_buf jmpbuf; - uch bg_red; - uch bg_green; - uch bg_blue; -} mainprog_info; - - -/* prototypes for public functions in writepng.c */ - -void writepng_version_info(void); - -int writepng_init(mainprog_info *mainprog_ptr); - -int writepng_encode_image(mainprog_info *mainprog_ptr); - -int writepng_encode_row(mainprog_info *mainprog_ptr); - -int writepng_encode_finish(mainprog_info *mainprog_ptr); - -void writepng_cleanup(mainprog_info *mainprog_ptr); diff --git a/lib/libpng-1.6.37/contrib/libtests/fakepng.c b/lib/libpng-1.6.37/contrib/libtests/fakepng.c deleted file mode 100644 index 6512c14..0000000 --- a/lib/libpng-1.6.37/contrib/libtests/fakepng.c +++ /dev/null @@ -1,65 +0,0 @@ -/* Fake a PNG - just write it out directly. - * - * COPYRIGHT: Written by John Cunningham Bowler, 2014. - * To the extent possible under law, the author has waived all copyright and - * related or neighboring rights to this work. This work is published from: - * United States. - * - */ - -#include -#include /* for crc32 */ - -void -put_uLong(uLong val) -{ - putchar(val >> 24); - putchar(val >> 16); - putchar(val >> 8); - putchar(val >> 0); -} - -void -put_chunk(const unsigned char *chunk, uInt length) -{ - uLong crc; - - put_uLong(length-4); /* Exclude the tag */ - - fwrite(chunk, length, 1, stdout); - - crc = crc32(0, Z_NULL, 0); - put_uLong(crc32(crc, chunk, length)); -} - -const unsigned char signature[] = -{ - 137, 80, 78, 71, 13, 10, 26, 10 -}; - -const unsigned char IHDR[] = -{ - 73, 72, 68, 82, /* IHDR */ - 0, 0, 0, 1, /* width */ - 0, 0, 0, 1, /* height */ - 1, /* bit depth */ - 0, /* color type: greyscale */ - 0, /* compression method */ - 0, /* filter method */ - 0 /* interlace method: none */ -}; - -const unsigned char unknown[] = -{ - 'u', 'n', 'K', 'n' /* "unKn" - private safe to copy */ -}; - -int -main(void) -{ - fwrite(signature, sizeof signature, 1, stdout); - put_chunk(IHDR, sizeof IHDR); - - for (;;) - put_chunk(unknown, sizeof unknown); -} diff --git a/lib/libpng-1.6.37/contrib/libtests/gentests.sh b/lib/libpng-1.6.37/contrib/libtests/gentests.sh deleted file mode 100755 index f0f8d23..0000000 --- a/lib/libpng-1.6.37/contrib/libtests/gentests.sh +++ /dev/null @@ -1,102 +0,0 @@ -#!/bin/sh -# -# Copyright (c) 2013 John Cunningham Bowler -# -# Last changed in libpng 1.6.0 [February 14, 2013] -# -# This code is released under the libpng license. -# For conditions of distribution and use, see the disclaimer -# and license in png.h -# -# Generate a set of PNG test images. The images are generated in a -# sub-directory called 'tests' by default, however a command line argument will -# change that name. The generation requires a built version of makepng in the -# current directory. -# -usage(){ - exec >&2 - echo "$0 []" - echo ' Generate a set of PNG test files in "directory" ("tests" by default)' - exit 1 -} - -mp="$PWD/makepng" -test -x "$mp" || { - exec >&2 - echo "$0: the 'makepng' program must exist" - echo " in the directory within which this program:" - echo " $mp" - echo " is executed" - usage -} - -# Just one argument: the directory -testdir="tests" -test $# -gt 1 && { - testdir="$1" - shift -} -test $# -eq 0 || usage - -# Take care not to clobber something -if test -e "$testdir" -then - test -d "$testdir" || usage -else - # mkdir -p isn't portable, so do the following - mkdir "$testdir" 2>/dev/null || mkdir -p "$testdir" || usage -fi - -# This fails in a very satisfactory way if it's not accessible -cd "$testdir" -:>"test$$.png" || { - exec >&2 - echo "$testdir: directory not writable" - usage -} -rm "test$$.png" || { - exec >&2 - echo "$testdir: you have create but not write privileges here." - echo " This is unexpected. You have a spurion; "'"'"test$$.png"'"'"." - echo " You need to remove this yourself. Try a different directory." - exit 1 -} - -# Now call makepng ($mp) to create every file we can think of with a -# reasonable name -doit(){ - for gamma in "" --sRGB --linear --1.8 - do - case "$gamma" in - "") - gname=;; - --sRGB) - gname="-srgb";; - --linear) - gname="-lin";; - --1.8) - gname="-18";; - *) - gname="-$gamma";; - esac - "$mp" $gamma "$1" "$2" "test-$1-$2$gname.png" - done -} -# -for ct in gray palette -do - for bd in 1 2 4 8 - do - doit "$ct" "$bd" - done -done -# -doit "gray" "16" -# -for ct in gray-alpha rgb rgb-alpha -do - for bd in 8 16 - do - doit "$ct" "$bd" - done -done diff --git a/lib/libpng-1.6.37/contrib/libtests/makepng.c b/lib/libpng-1.6.37/contrib/libtests/makepng.c deleted file mode 100644 index 312062b..0000000 --- a/lib/libpng-1.6.37/contrib/libtests/makepng.c +++ /dev/null @@ -1,1941 +0,0 @@ -/* makepng.c */ -#define _ISOC99_SOURCE -/* Copyright: */ -#define COPYRIGHT "\251 2013,2015 John Cunningham Bowler" -/* - * Last changed in libpng 1.6.20 [November 24, 2015] - * - * This code is released under the libpng license. - * For conditions of distribution and use, see the disclaimer - * and license in png.h - * - * Make a test PNG image. The arguments are as follows: - * - * makepng [--sRGB|--linear|--1.8] [--tRNS] [--nofilters] \ - * color-type bit-depth [file-name] - * - * The color-type may be numeric (and must match the numbers used by the PNG - * specification) or one of the format names listed below. The bit-depth is the - * component bit depth, or the pixel bit-depth for a color-mapped image. - * - * Without any options no color-space information is written, with the options - * an sRGB or the appropriate gAMA chunk is written. "1.8" refers to the - * display system used on older Apple computers to correct for high ambient - * light levels in the viewing environment; it applies a transform of - * approximately value^(1/1.45) to the color values and so a gAMA chunk of 65909 - * is written (1.45/2.2). - * - * The image data is generated internally. Unless --color is given the images - * used are as follows: - * - * 1 channel: a square image with a diamond, the least luminous colors are on - * the edge of the image, the most luminous in the center. - * - * 2 channels: the color channel increases in luminosity from top to bottom, the - * alpha channel increases in opacity from left to right. - * - * 3 channels: linear combinations of, from the top-left corner clockwise, - * black, green, white, red. - * - * 4 channels: linear combinations of, from the top-left corner clockwise, - * transparent, red, green, blue. - * - * For color-mapped images a four channel color-map is used and if --tRNS is - * given the PNG file has a tRNS chunk, as follows: - * - * 1-bit: entry 0 is transparent-red, entry 1 is opaque-white - * 2-bit: entry 0: transparent-green - * entry 1: 40%-red - * entry 2: 80%-blue - * entry 3: opaque-white - * 4-bit: the 16 combinations of the 2-bit case - * 8-bit: the 256 combinations of the 4-bit case - * - * The palette always has 2^bit-depth entries and the tRNS chunk one fewer. The - * image is the 1-channel diamond, but using palette index, not luminosity. - * - * For formats other than color-mapped ones if --tRNS is specified a tRNS chunk - * is generated with all channels equal to the low bits of 0x0101. - * - * Image size is determined by the final pixel depth in bits, i.e. channels x - * bit-depth, as follows: - * - * 8 bits or less: 64x64 - * 16 bits: 256x256 - * More than 16 bits: 1024x1024 - * - * Row filtering is the libpng default but may be turned off (the 'none' filter - * is used on every row) with the --nofilters option. - * - * The images are not interlaced. - * - * If file-name is given then the PNG is written to that file, else it is - * written to stdout. Notice that stdout is not supported on systems where, by - * default, it assumes text output; this program makes no attempt to change the - * text mode of stdout! - * - * makepng --color= ... - * - * If --color is given then the whole image has that color, color-mapped images - * will have exactly one palette entry and all image files with be 16x16 in - * size. The color value is 1 to 4 decimal numbers as appropriate for the color - * type. - * - * makepng --small ... - * - * If --small is given the images are no larger than required to include every - * possible pixel value for the format. - * - * For formats with pixels 8 bits or fewer in size the images consist of a - * single row with 2^pixel-depth pixels, one of every possible value. - * - * For formats with 16-bit pixels a 256x256 image is generated containing every - * possible pixel value. - * - * For larger pixel sizes a 256x256 image is generated where the first row - * consists of each pixel that has identical byte values throughout the pixel - * followed by rows where the byte values differ within the pixel. - * - * In all cases the pixel values are arranged in such a way that the SUB and UP - * filters give byte sequences for maximal zlib compression. By default (if - * --nofilters is not given) the SUB filter is used on the first row and the UP - * filter on all following rows. - * - * The --small option is meant to provide good test-case coverage, however the - * images are not easy to examine visually. Without the --small option the - * images contain identical color values; the pixel values are adjusted - * according to the gamma encoding with no gamma encoding being interpreted as - * sRGB. - * - * LICENSING - * ========= - * - * This code is copyright of the authors, see the COPYRIGHT define above. The - * code is licensed as above, using the libpng license. The code generates - * images which are solely the product of the code; the options choose which of - * the many possibilities to generate. The images that result (but not the code - * which generates them) are licensed as defined here: - * - * IMPORTANT: the COPYRIGHT #define must contain ISO-Latin-1 characters, the - * IMAGE_LICENSING #define must contain UTF-8 characters. The 'copyright' - * symbol 0xA9U (\251) in ISO-Latin-1 encoding and 0xC20xA9 (\302\251) in UTF-8. - */ -#define IMAGE_LICENSING "Dedicated to the public domain per Creative Commons "\ - "license \"CC0 1.0\"; https://creativecommons.org/publicdomain/zero/1.0/" - -#include /* for offsetof */ -#include -#include -#include -#include -#include -#include -#include -#include - -#if defined(HAVE_CONFIG_H) && !defined(PNG_NO_CONFIG_H) -# include -#endif - -/* Define the following to use this test against your installed libpng, rather - * than the one being built here: - */ -#ifdef PNG_FREESTANDING_TESTS -# include -#else -# include "../../png.h" -#endif - -#include - -/* Work round for GCC complaints about casting a (double) function result to - * an unsigned: - */ -static unsigned int -flooru(double d) -{ - d = floor(d); - return (unsigned int)d; -} - -static png_byte -floorb(double d) -{ - d = floor(d); - return (png_byte)d; -} - -/* This structure is used for inserting extra chunks (the --insert argument, not - * documented above.) - */ -typedef struct chunk_insert -{ - struct chunk_insert *next; - void (*insert)(png_structp, png_infop, int, png_charpp); - int nparams; - png_charp parameters[1]; -} chunk_insert; - -static unsigned int -channels_of_type(int color_type) -{ - if (color_type & PNG_COLOR_MASK_PALETTE) - return 1; - - else - { - int channels = 1; - - if (color_type & PNG_COLOR_MASK_COLOR) - channels = 3; - - if (color_type & PNG_COLOR_MASK_ALPHA) - return channels + 1; - - else - return channels; - } -} - -static unsigned int -pixel_depth_of_type(int color_type, int bit_depth) -{ - return channels_of_type(color_type) * bit_depth; -} - -static unsigned int -image_size_of_type(int color_type, int bit_depth, unsigned int *colors, - int small) -{ - if (*colors) - return 16; - - else - { - int pixel_depth = pixel_depth_of_type(color_type, bit_depth); - - if (small) - { - if (pixel_depth <= 8) /* there will be one row */ - return 1 << pixel_depth; - - else - return 256; - } - - else if (pixel_depth < 8) - return 64; - - else if (pixel_depth > 16) - return 1024; - - else - return 256; - } -} - -static void -set_color(png_colorp color, png_bytep trans, unsigned int red, - unsigned int green, unsigned int blue, unsigned int alpha, - png_const_bytep gamma_table) -{ - color->red = gamma_table[red]; - color->green = gamma_table[green]; - color->blue = gamma_table[blue]; - *trans = (png_byte)alpha; -} - -static int -generate_palette(png_colorp palette, png_bytep trans, int bit_depth, - png_const_bytep gamma_table, unsigned int *colors) -{ - /* - * 1-bit: entry 0 is transparent-red, entry 1 is opaque-white - * 2-bit: entry 0: transparent-green - * entry 1: 40%-red - * entry 2: 80%-blue - * entry 3: opaque-white - * 4-bit: the 16 combinations of the 2-bit case - * 8-bit: the 256 combinations of the 4-bit case - */ - switch (colors[0]) - { - default: - fprintf(stderr, "makepng: --colors=...: invalid count %u\n", - colors[0]); - exit(1); - - case 1: - set_color(palette+0, trans+0, colors[1], colors[1], colors[1], 255, - gamma_table); - return 1; - - case 2: - set_color(palette+0, trans+0, colors[1], colors[1], colors[1], - colors[2], gamma_table); - return 1; - - case 3: - set_color(palette+0, trans+0, colors[1], colors[2], colors[3], 255, - gamma_table); - return 1; - - case 4: - set_color(palette+0, trans+0, colors[1], colors[2], colors[3], - colors[4], gamma_table); - return 1; - - case 0: - if (bit_depth == 1) - { - set_color(palette+0, trans+0, 255, 0, 0, 0, gamma_table); - set_color(palette+1, trans+1, 255, 255, 255, 255, gamma_table); - return 2; - } - - else - { - unsigned int size = 1U << (bit_depth/2); /* 2, 4 or 16 */ - unsigned int x, y; - volatile unsigned int ip = 0; - - for (x=0; x> 3; - - if (offset < rowbytes && (bit_depth < 16 || offset+1 < rowbytes)) - { - row += offset; - - switch (bit_depth) - { - case 1: - case 2: - case 4: - /* Don't gamma correct - values get smashed */ - { - unsigned int shift = (8 - bit_depth) - (x & 0x7U); - - mask <<= shift; - value = (value << shift) & mask; - *row = (png_byte)((*row & ~mask) | value); - } - return; - - default: - fprintf(stderr, "makepng: bad bit depth (internal error)\n"); - exit(1); - - case 16: - value = flooru(65535*pow(value/65535.,conv)+.5); - *row++ = (png_byte)(value >> 8); - *row = (png_byte)value; - return; - - case 8: - *row = gamma_table[value]; - return; - } - } - - else - { - fprintf(stderr, "makepng: row buffer overflow (internal error)\n"); - exit(1); - } - } - - else - { - fprintf(stderr, "makepng: component overflow (internal error)\n"); - exit(1); - } -} - -static int /* filter mask for row */ -generate_row(png_bytep row, size_t rowbytes, unsigned int y, int color_type, - int bit_depth, png_const_bytep gamma_table, double conv, - unsigned int *colors, int small) -{ - int filters = 0; /* file *MASK*, 0 means the default, not NONE */ - png_uint_32 size_max = - image_size_of_type(color_type, bit_depth, colors, small)-1; - png_uint_32 depth_max = (1U << bit_depth)-1; /* up to 65536 */ - - if (colors[0] == 0) if (small) - { - unsigned int pixel_depth = pixel_depth_of_type(color_type, bit_depth); - - /* For pixel depths less than 16 generate a single row containing all the - * possible pixel values. For 16 generate all 65536 byte pair - * combinations in a 256x256 pixel array. - */ - switch (pixel_depth) - { - case 1: - assert(y == 0 && rowbytes == 1 && size_max == 1); - row[0] = 0x6CU; /* binary: 01101100, only top 2 bits used */ - filters = PNG_FILTER_NONE; - break; - - case 2: - assert(y == 0 && rowbytes == 1 && size_max == 3); - row[0] = 0x1BU; /* binary 00011011, all bits used */ - filters = PNG_FILTER_NONE; - break; - - case 4: - assert(y == 0 && rowbytes == 8 && size_max == 15); - row[0] = 0x01U; - row[1] = 0x23U; /* SUB gives 0x22U for all following bytes */ - row[2] = 0x45U; - row[3] = 0x67U; - row[4] = 0x89U; - row[5] = 0xABU; - row[6] = 0xCDU; - row[7] = 0xEFU; - filters = PNG_FILTER_SUB; - break; - - case 8: - /* The row will have all the pixel values in order starting with - * '1', the SUB filter will change every byte into '1' (including - * the last, which generates pixel value '0'). Since the SUB filter - * has value 1 this should result in maximum compression. - */ - assert(y == 0 && rowbytes == 256 && size_max == 255); - for (;;) - { - row[size_max] = 0xFFU & (size_max+1); - if (size_max == 0) - break; - --size_max; - } - filters = PNG_FILTER_SUB; - break; - - case 16: - /* Rows are generated such that each row has a constant difference - * between the first and second byte of each pixel and so that the - * difference increases by 1 at each row. The rows start with the - * first byte value of 0 and the value increases to 255 across the - * row. - * - * The difference starts at 1, so the first row is: - * - * 0 1 1 2 2 3 3 4 ... 254 255 255 0 - * - * This means that running the SUB filter on the first row produces: - * - * [SUB==1] 0 1 0 1 0 1... - * - * Then the difference is 2 on the next row, giving: - * - * 0 2 1 3 2 4 3 5 ... 254 0 255 1 - * - * When the UP filter is run on this libpng produces: - * - * [UP ==2] 0 1 0 1 0 1... - * - * And so on for all the remain rows to the final two * rows: - * - * row 254: 0 255 1 0 2 1 3 2 4 3 ... 254 253 255 254 - * row 255: 0 0 1 1 2 2 3 3 4 4 ... 254 254 255 255 - */ - assert(rowbytes == 512 && size_max == 255); - for (;;) - { - row[2*size_max ] = 0xFFU & size_max; - row[2*size_max+1] = 0xFFU & (size_max+y+1); - if (size_max == 0) - break; - --size_max; - } - /* The first row must include PNG_FILTER_UP so that libpng knows we - * need to keep it for the following row: - */ - filters = (y == 0 ? PNG_FILTER_SUB+PNG_FILTER_UP : PNG_FILTER_UP); - break; - - case 24: - case 32: - case 48: - case 64: - /* The rows are filled by an alogorithm similar to the above, in the - * first row pixel bytes are all equal, increasing from 0 by 1 for - * each pixel. In the second row the bytes within a pixel are - * incremented 1,3,5,7,... from the previous row byte. Using an odd - * number ensures all the possible byte values are used. - */ - assert(size_max == 255 && rowbytes == 256*(pixel_depth>>3)); - pixel_depth >>= 3; /* now in bytes */ - while (rowbytes > 0) - { - const size_t pixel_index = --rowbytes/pixel_depth; - - if (y == 0) - row[rowbytes] = 0xFFU & pixel_index; - - else - { - const size_t byte_offset = - rowbytes - pixel_index * pixel_depth; - - row[rowbytes] = - 0xFFU & (pixel_index + (byte_offset * 2*y) + 1); - } - } - filters = (y == 0 ? PNG_FILTER_SUB+PNG_FILTER_UP : PNG_FILTER_UP); - break; - - default: - assert(0/*NOT REACHED*/); - } - } - - else switch (channels_of_type(color_type)) - { - /* 1 channel: a square image with a diamond, the least luminous colors are on - * the edge of the image, the most luminous in the center. - */ - case 1: - { - png_uint_32 x; - png_uint_32 base = 2*size_max - abs(2*y-size_max); - - for (x=0; x<=size_max; ++x) - { - png_uint_32 luma = base - abs(2*x-size_max); - - /* 'luma' is now in the range 0..2*size_max, we need - * 0..depth_max - */ - luma = (luma*depth_max + size_max) / (2*size_max); - set_value(row, rowbytes, x, bit_depth, luma, gamma_table, conv); - } - } - break; - - /* 2 channels: the color channel increases in luminosity from top to bottom, - * the alpha channel increases in opacity from left to right. - */ - case 2: - { - png_uint_32 alpha = (depth_max * y * 2 + size_max) / (2 * size_max); - png_uint_32 x; - - for (x=0; x<=size_max; ++x) - { - set_value(row, rowbytes, 2*x, bit_depth, - (depth_max * x * 2 + size_max) / (2 * size_max), gamma_table, - conv); - set_value(row, rowbytes, 2*x+1, bit_depth, alpha, gamma_table, - conv); - } - } - break; - - /* 3 channels: linear combinations of, from the top-left corner clockwise, - * black, green, white, red. - */ - case 3: - { - /* x0: the black->red scale (the value of the red component) at the - * start of the row (blue and green are 0). - * x1: the green->white scale (the value of the red and blue - * components at the end of the row; green is depth_max). - */ - png_uint_32 Y = (depth_max * y * 2 + size_max) / (2 * size_max); - png_uint_32 x; - - /* Interpolate x/depth_max from start to end: - * - * start end difference - * red: Y Y 0 - * green: 0 depth_max depth_max - * blue: 0 Y Y - */ - for (x=0; x<=size_max; ++x) - { - set_value(row, rowbytes, 3*x+0, bit_depth, /* red */ Y, - gamma_table, conv); - set_value(row, rowbytes, 3*x+1, bit_depth, /* green */ - (depth_max * x * 2 + size_max) / (2 * size_max), - gamma_table, conv); - set_value(row, rowbytes, 3*x+2, bit_depth, /* blue */ - (Y * x * 2 + size_max) / (2 * size_max), - gamma_table, conv); - } - } - break; - - /* 4 channels: linear combinations of, from the top-left corner clockwise, - * transparent, red, green, blue. - */ - case 4: - { - /* x0: the transparent->blue scale (the value of the blue and alpha - * components) at the start of the row (red and green are 0). - * x1: the red->green scale (the value of the red and green - * components at the end of the row; blue is 0 and alpha is - * depth_max). - */ - png_uint_32 Y = (depth_max * y * 2 + size_max) / (2 * size_max); - png_uint_32 x; - - /* Interpolate x/depth_max from start to end: - * - * start end difference - * red: 0 depth_max-Y depth_max-Y - * green: 0 Y Y - * blue: Y 0 -Y - * alpha: Y depth_max depth_max-Y - */ - for (x=0; x<=size_max; ++x) - { - set_value(row, rowbytes, 4*x+0, bit_depth, /* red */ - ((depth_max-Y) * x * 2 + size_max) / (2 * size_max), - gamma_table, conv); - set_value(row, rowbytes, 4*x+1, bit_depth, /* green */ - (Y * x * 2 + size_max) / (2 * size_max), - gamma_table, conv); - set_value(row, rowbytes, 4*x+2, bit_depth, /* blue */ - Y - (Y * x * 2 + size_max) / (2 * size_max), - gamma_table, conv); - set_value(row, rowbytes, 4*x+3, bit_depth, /* alpha */ - Y + ((depth_max-Y) * x * 2 + size_max) / (2 * size_max), - gamma_table, conv); - } - } - break; - - default: - fprintf(stderr, "makepng: internal bad channel count\n"); - exit(2); - } - - else if (color_type & PNG_COLOR_MASK_PALETTE) - { - /* Palette with fixed color: the image rows are all 0 and the image width - * is 16. - */ - memset(row, 0, rowbytes); - } - - else if (colors[0] == channels_of_type(color_type)) - switch (channels_of_type(color_type)) - { - case 1: - { - png_uint_32 luma = colors[1]; - png_uint_32 x; - - for (x=0; x<=size_max; ++x) - set_value(row, rowbytes, x, bit_depth, luma, gamma_table, - conv); - } - break; - - case 2: - { - png_uint_32 luma = colors[1]; - png_uint_32 alpha = colors[2]; - png_uint_32 x; - - for (x=0; x 0 && gamma < 1000) - gamma = PNG_FP_1; - - if (gamma > 0) - real_gamma = gamma; - - { - unsigned int i; - - if (real_gamma == 45455) for (i=0; i<256; ++i) - { - gamma_table[i] = (png_byte)i; - conv = 1.; - } - - else - { - /* Convert 'i' from sRGB (45455) to real_gamma, this makes - * the images look the same regardless of the gAMA chunk. - */ - conv = real_gamma; - conv /= 45455; - - gamma_table[0] = 0; - - for (i=1; i<255; ++i) - gamma_table[i] = floorb(pow(i/255.,conv) * 255 + .5); - - gamma_table[255] = 255; - } - } - - png_set_IHDR(png_ptr, info_ptr, size, ysize, bit_depth, color_type, - PNG_INTERLACE_NONE, PNG_COMPRESSION_TYPE_BASE, PNG_FILTER_TYPE_BASE); - - if (color_type & PNG_COLOR_MASK_PALETTE) - { - int npalette; - png_color palette[256]; - png_byte trans[256]; - - npalette = generate_palette(palette, trans, bit_depth, gamma_table, - colors); - png_set_PLTE(png_ptr, info_ptr, palette, npalette); - - if (tRNS) - png_set_tRNS(png_ptr, info_ptr, trans, npalette-1, - NULL/*transparent color*/); - - /* Reset gamma_table to prevent the image rows being changed */ - for (npalette=0; npalette<256; ++npalette) - gamma_table[npalette] = (png_byte)npalette; - } - - else if (tRNS) - { - png_color_16 col; - - col.red = col.green = col.blue = col.gray = - 0x0101U & ((1U< 0) /* Else don't set color space information */ - { - png_set_gAMA_fixed(png_ptr, info_ptr, real_gamma); - - /* Just use the sRGB values here. */ - png_set_cHRM_fixed(png_ptr, info_ptr, - /* color x y */ - /* white */ 31270, 32900, - /* red */ 64000, 33000, - /* green */ 30000, 60000, - /* blue */ 15000, 6000 - ); - } - - /* Insert extra information. */ - while (insert != NULL) - { - insert->insert(png_ptr, info_ptr, insert->nparams, insert->parameters); - insert = insert->next; - } - - /* Write the file header. */ - png_write_info(png_ptr, info_ptr); - - /* Restrict the filters */ - png_set_filter(png_ptr, PNG_FILTER_TYPE_BASE, filters); - - { -# ifdef PNG_WRITE_INTERLACING_SUPPORTED - int passes = png_set_interlace_handling(png_ptr); -# else /* !WRITE_INTERLACING */ - int passes = 1; -# endif /* !WRITE_INTERLACING */ - int pass; - size_t rowbytes = png_get_rowbytes(png_ptr, info_ptr); - - row = malloc(rowbytes); - - if (row == NULL) - png_error(png_ptr, "OOM allocating row buffer"); - - for (pass = 0; pass < passes; ++pass) - { - unsigned int y; - - for (y=0; y 0) - { - /* Round up to a multiple of 4 here to allow an iCCP profile - * to be padded to a 4x boundary. - */ - png_bytep data = malloc((total+3)&~3); - - if (data != NULL) - { - size_t new_size = 0; - - for (;;) - { - ch = getc(fp); - if (ch == EOF) break; - data[new_size++] = (png_byte)ch; - } - - if (ferror(fp) || new_size != total) - { - perror("temporary file"); - fprintf(stderr, "temporary file read error\n"); - free(data); - } - - else - { - (void)fclose(fp); - *result = data; - return total; - } - } - - else - fprintf(stderr, "%s: out of memory loading file\n", name); - } - - else - fprintf(stderr, "%s: empty file\n", name); - } - } - } - - else - { - perror(name); - fprintf(stderr, "%s: open failed\n", name); - } - - fclose(fp); - } - - else - fprintf(stderr, "makepng: %s: could not open temporary file\n", name); - - exit(1); - return 0; -} - -static size_t -load_fake(png_charp param, png_bytepp profile) -{ - char *endptr = NULL; - uint64_t size = strtoull(param, &endptr, 0/*base*/); - - /* The 'fake' format is *[string] */ - if (endptr != NULL && *endptr == '*') - { - size_t len = strlen(++endptr); - size_t result = (size_t)size; - - if (len == 0) len = 1; /* capture the terminating '\0' */ - - /* Now repeat that string to fill 'size' bytes. */ - if (result == size && (*profile = malloc(result)) != NULL) - { - png_bytep out = *profile; - - if (len == 1) - memset(out, *endptr, result); - - else - { - while (size >= len) - { - memcpy(out, endptr, len); - out += len; - size -= len; - } - memcpy(out, endptr, size); - } - - return result; - } - - else - { - fprintf(stderr, "%s: size exceeds system limits\n", param); - exit(1); - } - } - - return 0; -} - -static void -check_param_count(int nparams, int expect) -{ - if (nparams != expect) - { - fprintf(stderr, "bad parameter count (internal error)\n"); - exit(1); - } -} - -static void -insert_iCCP(png_structp png_ptr, png_infop info_ptr, int nparams, - png_charpp params) -{ - png_bytep profile = NULL; - png_uint_32 proflen = 0; - int result; - - check_param_count(nparams, 2); - - switch (params[1][0]) - { - case '<': - { - size_t filelen = load_file(params[1]+1, &profile); - if (filelen > 0xfffffffc) /* Maximum profile length */ - { - fprintf(stderr, "%s: file too long (%lu) for an ICC profile\n", - params[1]+1, (unsigned long)filelen); - exit(1); - } - - proflen = (png_uint_32)filelen; - } - break; - - case '0': case '1': case '2': case '3': case '4': - case '5': case '6': case '7': case '8': case '9': - { - size_t fake_len = load_fake(params[1], &profile); - - if (fake_len > 0) /* else a simple parameter */ - { - if (fake_len > 0xffffffff) /* Maximum profile length */ - { - fprintf(stderr, - "%s: fake data too long (%lu) for an ICC profile\n", - params[1], (unsigned long)fake_len); - exit(1); - } - proflen = (png_uint_32)(fake_len & ~3U); - /* Always fix up the profile length. */ - png_save_uint_32(profile, proflen); - break; - } - } - - default: - fprintf(stderr, "--insert iCCP \"%s\": unrecognized\n", params[1]); - fprintf(stderr, " use '<' to read a file: \" 3) - { - png_uint_32 prof_header = png_get_uint_32(profile); - - if (prof_header != proflen) - { - fprintf(stderr, "--insert iCCP %s: profile length field wrong:\n", - params[1]); - fprintf(stderr, " actual %lu, recorded value %lu (corrected)\n", - (unsigned long)proflen, (unsigned long)prof_header); - png_save_uint_32(profile, proflen); - } - } - - if (result && profile != NULL && proflen >=4) - png_set_iCCP(png_ptr, info_ptr, params[0], PNG_COMPRESSION_TYPE_BASE, - profile, proflen); - - if (profile) - free(profile); - - if (!result) - exit(1); -} - -static void -clear_text(png_text *text, png_charp keyword) -{ - text->compression = -1; /* none */ - text->key = keyword; - text->text = NULL; - text->text_length = 0; /* libpng calculates this */ - text->itxt_length = 0; /* libpng calculates this */ - text->lang = NULL; - text->lang_key = NULL; -} - -static void -set_text(png_structp png_ptr, png_infop info_ptr, png_textp text, - png_charp param) -{ - switch (param[0]) - { - case '<': - { - png_bytep file = NULL; - - text->text_length = load_file(param+1, &file); - text->text = (png_charp)file; - } - break; - - case '0': case '1': case '2': case '3': case '4': - case '5': case '6': case '7': case '8': case '9': - { - png_bytep data = NULL; - size_t fake_len = load_fake(param, &data); - - if (fake_len > 0) /* else a simple parameter */ - { - text->text_length = fake_len; - text->text = (png_charp)data; - break; - } - } - - default: - text->text = param; - break; - } - - png_set_text(png_ptr, info_ptr, text, 1); - - if (text->text != param) - free(text->text); -} - -static void -insert_tEXt(png_structp png_ptr, png_infop info_ptr, int nparams, - png_charpp params) -{ - png_text text; - - check_param_count(nparams, 2); - clear_text(&text, params[0]); - set_text(png_ptr, info_ptr, &text, params[1]); -} - -static void -insert_zTXt(png_structp png_ptr, png_infop info_ptr, int nparams, - png_charpp params) -{ - png_text text; - - check_param_count(nparams, 2); - clear_text(&text, params[0]); - text.compression = 0; /* deflate */ - set_text(png_ptr, info_ptr, &text, params[1]); -} - -static void -insert_iTXt(png_structp png_ptr, png_infop info_ptr, int nparams, - png_charpp params) -{ - png_text text; - - check_param_count(nparams, 4); - clear_text(&text, params[0]); - text.compression = 2; /* iTXt + deflate */ - text.lang = params[1];/* language tag */ - text.lang_key = params[2]; /* translated keyword */ - set_text(png_ptr, info_ptr, &text, params[3]); -} - -static void -insert_hIST(png_structp png_ptr, png_infop info_ptr, int nparams, - png_charpp params) -{ - int i; - png_uint_16 freq[256]; - - /* libpng takes the count from the PLTE count; we don't check it here but we - * do set the array to 0 for unspecified entries. - */ - memset(freq, 0, sizeof freq); - for (i=0; inext = NULL; - cip->insert = insert; - cip->nparams = nparams; - for (i=0; iparameters[i] = list[i]; - - return cip; -} - -static chunk_insert * -find_insert(png_const_charp what, png_charp param) -{ - png_uint_32 chunk = 0; - png_charp parameter_list[1024]; - int i, nparams; - - /* Assemble the chunk name */ - for (i=0; i<4; ++i) - { - char ch = what[i]; - - if ((ch >= 65 && ch <= 90) || (ch >= 97 && ch <= 122)) - chunk = (chunk << 8) + what[i]; - - else - break; - } - - if (i < 4 || what[4] != 0) - { - fprintf(stderr, "makepng --insert \"%s\": invalid chunk name\n", what); - exit(1); - } - - /* Assemble the parameter list. */ - nparams = find_parameters(what, param, parameter_list, 1024); - -# define CHUNK(a,b,c,d) (((a)<<24)+((b)<<16)+((c)<<8)+(d)) - - switch (chunk) - { - case CHUNK(105,67,67,80): /* iCCP */ - if (nparams == 2) - return make_insert(what, insert_iCCP, nparams, parameter_list); - break; - - case CHUNK(116,69,88,116): /* tEXt */ - if (nparams == 2) - return make_insert(what, insert_tEXt, nparams, parameter_list); - break; - - case CHUNK(122,84,88,116): /* zTXt */ - if (nparams == 2) - return make_insert(what, insert_zTXt, nparams, parameter_list); - break; - - case CHUNK(105,84,88,116): /* iTXt */ - if (nparams == 4) - return make_insert(what, insert_iTXt, nparams, parameter_list); - break; - - case CHUNK(104,73,83,84): /* hIST */ - if (nparams <= 256) - return make_insert(what, insert_hIST, nparams, parameter_list); - break; - - case CHUNK(115,66,73,84): /* sBIT */ - if (nparams <= 4) - return make_insert(what, insert_sBIT, nparams, parameter_list); - break; - -#if 0 - case CHUNK(115,80,76,84): /* sPLT */ - return make_insert(what, insert_sPLT, nparams, parameter_list); -#endif - - default: - fprintf(stderr, "makepng --insert \"%s\": unrecognized chunk name\n", - what); - exit(1); - } - - bad_parameter_count(what, nparams); - return NULL; -} - -/* This is necessary because libpng expects writeable strings for things like - * text chunks (maybe this should be fixed...) - */ -static png_charp -strstash(png_const_charp foo) -{ - /* The program indicates a memory allocation error by crashing, this is by - * design. - */ - if (foo != NULL) - { - png_charp bar = malloc(strlen(foo)+1); - return strcpy(bar, foo); - } - - return NULL; -} - -static png_charp -strstash_list(const png_const_charp *text) -{ - size_t foo = 0; - png_charp result, bar; - const png_const_charp *line = text; - - while (*line != NULL) - foo += strlen(*line++); - - result = bar = malloc(foo+1); - - line = text; - while (*line != NULL) - { - foo = strlen(*line); - memcpy(bar, *line++, foo); - bar += foo; - } - - *bar = 0; - return result; -} - -/* These are used to insert Copyright and Licence fields, they allow the text to - * have \n unlike the --insert option. - */ -static chunk_insert * -add_tEXt(const char *key, const png_const_charp *text) -{ - static char what[5] = { 116, 69, 88, 116, 0 }; - png_charp parameter_list[3]; - - parameter_list[0] = strstash(key); - parameter_list[1] = strstash_list(text); - parameter_list[2] = NULL; - - return make_insert(what, insert_tEXt, 2, parameter_list); -} - -static chunk_insert * -add_iTXt(const char *key, const char *language, const char *language_key, - const png_const_charp *text) -{ - static char what[5] = { 105, 84, 88, 116, 0 }; - png_charp parameter_list[5]; - - parameter_list[0] = strstash(key); - parameter_list[1] = strstash(language); - parameter_list[2] = strstash(language_key); - parameter_list[3] = strstash_list(text); - parameter_list[4] = NULL; - - return make_insert(what, insert_iTXt, 4, parameter_list); -} - -/* This is a not-very-good parser for a sequence of numbers (including 0). It - * doesn't accept some apparently valid things, but it accepts all the sensible - * combinations. - */ -static void -parse_color(char *arg, unsigned int *colors) -{ - unsigned int ncolors = 0; - - while (*arg && ncolors < 4) - { - char *ep = arg; - - unsigned long ul = strtoul(arg, &ep, 0); - - if (ul > 65535) - { - fprintf(stderr, "makepng --color=...'%s': too big\n", arg); - exit(1); - } - - if (ep == arg) - { - fprintf(stderr, "makepng --color=...'%s': not a valid color\n", arg); - exit(1); - } - - if (*ep) ++ep; /* skip a separator */ - arg = ep; - - colors[++ncolors] = (unsigned int)ul; /* checked above */ - } - - if (*arg) - { - fprintf(stderr, "makepng --color=...'%s': too many values\n", arg); - exit(1); - } - - *colors = ncolors; -} - -int -main(int argc, char **argv) -{ - FILE *fp = stdout; - const char *file_name = NULL; - int color_type = 8; /* invalid */ - int bit_depth = 32; /* invalid */ - int small = 0; /* make full size images */ - int tRNS = 0; /* don't output a tRNS chunk */ - unsigned int colors[5]; - unsigned int filters = PNG_ALL_FILTERS; - png_fixed_point gamma = 0; /* not set */ - chunk_insert *head_insert = NULL; - chunk_insert **insert_ptr = &head_insert; - - memset(colors, 0, sizeof colors); - - while (--argc > 0) - { - char *arg = *++argv; - - if (strcmp(arg, "--small") == 0) - { - small = 1; - continue; - } - - if (strcmp(arg, "--tRNS") == 0) - { - tRNS = 1; - continue; - } - - if (strcmp(arg, "--sRGB") == 0) - { - gamma = PNG_DEFAULT_sRGB; - continue; - } - - if (strcmp(arg, "--linear") == 0) - { - gamma = PNG_FP_1; - continue; - } - - if (strcmp(arg, "--1.8") == 0) - { - gamma = PNG_GAMMA_MAC_18; - continue; - } - - if (strcmp(arg, "--nofilters") == 0) - { - filters = PNG_FILTER_NONE; - continue; - } - - if (strncmp(arg, "--color=", 8) == 0) - { - parse_color(arg+8, colors); - continue; - } - - if (argc >= 3 && strcmp(arg, "--insert") == 0) - { - png_const_charp what = *++argv; - png_charp param = *++argv; - chunk_insert *new_insert; - - argc -= 2; - - new_insert = find_insert(what, param); - - if (new_insert != NULL) - { - *insert_ptr = new_insert; - insert_ptr = &new_insert->next; - } - - continue; - } - - if (arg[0] == '-') - { - fprintf(stderr, "makepng: %s: invalid option\n", arg); - exit(1); - } - - if (strcmp(arg, "palette") == 0) - { - color_type = PNG_COLOR_TYPE_PALETTE; - continue; - } - - if (strncmp(arg, "gray", 4) == 0) - { - if (arg[4] == 0) - { - color_type = PNG_COLOR_TYPE_GRAY; - continue; - } - - else if (strcmp(arg+4, "a") == 0 || - strcmp(arg+4, "alpha") == 0 || - strcmp(arg+4, "-alpha") == 0) - { - color_type = PNG_COLOR_TYPE_GRAY_ALPHA; - continue; - } - } - - if (strncmp(arg, "rgb", 3) == 0) - { - if (arg[3] == 0) - { - color_type = PNG_COLOR_TYPE_RGB; - continue; - } - - else if (strcmp(arg+3, "a") == 0 || - strcmp(arg+3, "alpha") == 0 || - strcmp(arg+3, "-alpha") == 0) - { - color_type = PNG_COLOR_TYPE_RGB_ALPHA; - continue; - } - } - - if (color_type == 8 && isdigit(arg[0])) - { - color_type = atoi(arg); - if (color_type < 0 || color_type > 6 || color_type == 1 || - color_type == 5) - { - fprintf(stderr, "makepng: %s: not a valid color type\n", arg); - exit(1); - } - - continue; - } - - if (bit_depth == 32 && isdigit(arg[0])) - { - bit_depth = atoi(arg); - if (bit_depth <= 0 || bit_depth > 16 || - (bit_depth & -bit_depth) != bit_depth) - { - fprintf(stderr, "makepng: %s: not a valid bit depth\n", arg); - exit(1); - } - - continue; - } - - if (argc == 1) /* It's the file name */ - { - fp = fopen(arg, "wb"); - if (fp == NULL) - { - fprintf(stderr, "%s: %s: could not open\n", arg, strerror(errno)); - exit(1); - } - - file_name = arg; - continue; - } - - fprintf(stderr, "makepng: %s: unknown argument\n", arg); - exit(1); - } /* argument while loop */ - - if (color_type == 8 || bit_depth == 32) - { - fprintf(stderr, "usage: makepng [--small] [--sRGB|--linear|--1.8] " - "[--color=...] color-type bit-depth [file-name]\n" - " Make a test PNG file, by default writes to stdout.\n" - " Other options are available, UTSL.\n"); - exit(1); - } - - /* Check the colors */ - { - unsigned int lim = (color_type == PNG_COLOR_TYPE_PALETTE ? 255U : - (1U< lim) - { - fprintf(stderr, "makepng: --color=...: %u out of range [0..%u]\n", - colors[i], lim); - exit(1); - } - } - - /* small and colors are incomparible (will probably crash if both are used at - * the same time!) - */ - if (small && colors[0] != 0) - { - fprintf(stderr, "makepng: --color --small: only one at a time!\n"); - exit(1); - } - - /* Restrict the filters for more speed to those we know are used for the - * generated images. - */ - if (filters == PNG_ALL_FILTERS && !small/*small provides defaults*/) - { - if ((color_type & PNG_COLOR_MASK_PALETTE) != 0 || bit_depth < 8) - filters = PNG_FILTER_NONE; - - else if (color_type & PNG_COLOR_MASK_COLOR) /* rgb */ - { - if (bit_depth == 8) - filters &= ~(PNG_FILTER_NONE | PNG_FILTER_AVG); - - else - filters = PNG_FILTER_SUB | PNG_FILTER_PAETH; - } - - else /* gray 8 or 16-bit */ - filters &= ~PNG_FILTER_NONE; - } - - /* Insert standard copyright and licence text. */ - { - static png_const_charp copyright[] = - { - COPYRIGHT, /* ISO-Latin-1 */ - NULL - }; - static png_const_charp licensing[] = - { - IMAGE_LICENSING, /* UTF-8 */ - NULL - }; - - chunk_insert *new_insert; - - new_insert = add_tEXt("Copyright", copyright); - if (new_insert != NULL) - { - *insert_ptr = new_insert; - insert_ptr = &new_insert->next; - } - - new_insert = add_iTXt("Licensing", "en", NULL, licensing); - if (new_insert != NULL) - { - *insert_ptr = new_insert; - insert_ptr = &new_insert->next; - } - } - - { - int ret = write_png(&file_name, fp, color_type, bit_depth, gamma, - head_insert, filters, colors, small, tRNS); - - if (ret != 0 && file_name != NULL) - remove(file_name); - - return ret; - } -} diff --git a/lib/libpng-1.6.37/contrib/libtests/pngimage.c b/lib/libpng-1.6.37/contrib/libtests/pngimage.c deleted file mode 100644 index f130c04..0000000 --- a/lib/libpng-1.6.37/contrib/libtests/pngimage.c +++ /dev/null @@ -1,1712 +0,0 @@ -/* pngimage.c - * - * Copyright (c) 2015,2016 John Cunningham Bowler - * - * Last changed in libpng 1.6.24 [August 4, 2016] - * - * This code is released under the libpng license. - * For conditions of distribution and use, see the disclaimer - * and license in png.h - * - * Test the png_read_png and png_write_png interfaces. Given a PNG file load it - * using png_read_png and then write with png_write_png. Test all possible - * transforms. - */ -#include -#include -#include -#include -#include -#include - -#if defined(HAVE_CONFIG_H) && !defined(PNG_NO_CONFIG_H) -# include -#endif - -/* Define the following to use this test against your installed libpng, rather - * than the one being built here: - */ -#ifdef PNG_FREESTANDING_TESTS -# include -#else -# include "../../png.h" -#endif - -#ifndef PNG_SETJMP_SUPPORTED -# include /* because png.h did *not* include this */ -#endif - -/* 1.6.1 added support for the configure test harness, which uses 77 to indicate - * a skipped test, in earlier versions we need to succeed on a skipped test, so: - */ -#if PNG_LIBPNG_VER >= 10601 && defined(HAVE_CONFIG_H) -# define SKIP 77 -#else -# define SKIP 0 -#endif - -#if PNG_LIBPNG_VER < 10700 - /* READ_PNG and WRITE_PNG were not defined, so: */ -# ifdef PNG_INFO_IMAGE_SUPPORTED -# ifdef PNG_SEQUENTIAL_READ_SUPPORTED -# define PNG_READ_PNG_SUPPORTED -# endif /* SEQUENTIAL_READ */ -# ifdef PNG_WRITE_SUPPORTED -# define PNG_WRITE_PNG_SUPPORTED -# endif /* WRITE */ -# endif /* INFO_IMAGE */ -#endif /* pre 1.7.0 */ - -#ifdef PNG_READ_PNG_SUPPORTED -/* If a transform is valid on both read and write this implies that if the - * transform is applied to read it must also be applied on write to produce - * meaningful data. This is because these transforms when performed on read - * produce data with a memory format that does not correspond to a PNG format. - * - * Most of these transforms are invertible; after applying the transform on - * write the result is the original PNG data that would have would have been - * read if no transform were applied. - * - * The exception is _SHIFT, which destroys the low order bits marked as not - * significant in a PNG with the sBIT chunk. - * - * The following table lists, for each transform, the conditions under which it - * is expected to do anything. Conditions are defined as follows: - * - * 1) Color mask bits required - simply a mask to AND with color_type; one of - * these must be present for the transform to fire, except that 0 means - * 'always'. - * 2) Color mask bits which must be absent - another mask - none of these must - * be present. - * 3) Bit depths - a mask of component bit depths for the transform to fire. - * 4) 'read' - the transform works in png_read_png. - * 5) 'write' - the transform works in png_write_png. - * 6) PNG_INFO_chunk; a mask of the chunks that must be present for the - * transform to fire. All must be present - the requirement is that - * png_get_valid() & mask == mask, so if mask is 0 there is no requirement. - * - * The condition refers to the original image state - if multiple transforms are - * used together it is possible to cause a transform that wouldn't fire on the - * original image to fire. - */ -static struct transform_info -{ - const char *name; - int transform; - png_uint_32 valid_chunks; -# define CHUNK_NONE 0 -# define CHUNK_sBIT PNG_INFO_sBIT -# define CHUNK_tRNS PNG_INFO_tRNS - png_byte color_mask_required; - png_byte color_mask_absent; -# define COLOR_MASK_X 0 -# define COLOR_MASK_P PNG_COLOR_MASK_PALETTE -# define COLOR_MASK_C PNG_COLOR_MASK_COLOR -# define COLOR_MASK_A PNG_COLOR_MASK_ALPHA -# define COLOR_MASK_ALL (PALETTE+COLOR+ALPHA) /* absent = gray, no alpha */ - png_byte bit_depths; -# define BD_ALL (1 + 2 + 4 + 8 + 16) -# define BD_PAL (1 + 2 + 4 + 8) -# define BD_LOW (1 + 2 + 4) -# define BD_16 16 -# define BD_TRUE (8+16) /* i.e. true-color depths */ - png_byte when; -# define TRANSFORM_R 1 -# define TRANSFORM_W 2 -# define TRANSFORM_RW 3 - png_byte tested; /* the transform was tested somewhere */ -} transform_info[] = -{ - /* List ALL the PNG_TRANSFORM_ macros here. Check for support using the READ - * macros; even if the transform is supported on write it cannot be tested - * without the read support. - */ -# define T(name,chunk,cm_required,cm_absent,bd,when)\ - { #name, PNG_TRANSFORM_ ## name, CHUNK_ ## chunk,\ - COLOR_MASK_ ## cm_required, COLOR_MASK_ ## cm_absent, BD_ ## bd,\ - TRANSFORM_ ## when, 0/*!tested*/ } - -#ifdef PNG_READ_STRIP_16_TO_8_SUPPORTED - T(STRIP_16, NONE, X, X, 16, R), - /* drops the bottom 8 bits when bit depth is 16 */ -#endif -#ifdef PNG_READ_STRIP_ALPHA_SUPPORTED - T(STRIP_ALPHA, NONE, A, X, ALL, R), - /* removes the alpha channel if present */ -#endif -#ifdef PNG_WRITE_PACK_SUPPORTED -# define TRANSFORM_RW_PACK TRANSFORM_RW -#else -# define TRANSFORM_RW_PACK TRANSFORM_R -#endif -#ifdef PNG_READ_PACK_SUPPORTED - T(PACKING, NONE, X, X, LOW, RW_PACK), - /* unpacks low-bit-depth components into 1 byte per component on read, - * reverses this on write. - */ -#endif -#ifdef PNG_WRITE_PACKSWAP_SUPPORTED -# define TRANSFORM_RW_PACKSWAP TRANSFORM_RW -#else -# define TRANSFORM_RW_PACKSWAP TRANSFORM_R -#endif -#ifdef PNG_READ_PACKSWAP_SUPPORTED - T(PACKSWAP, NONE, X, X, LOW, RW_PACKSWAP), - /* reverses the order of low-bit-depth components packed into a byte */ -#endif -#ifdef PNG_READ_EXPAND_SUPPORTED - T(EXPAND, NONE, P, X, ALL, R), - /* expands PLTE PNG files to RGB (no tRNS) or RGBA (tRNS) * - * Note that the 'EXPAND' transform does lots of different things: */ - T(EXPAND, NONE, X, C, ALL, R), - /* expands grayscale PNG files to RGB, or RGBA */ - T(EXPAND, tRNS, X, A, ALL, R), - /* expands the tRNS chunk in files without alpha */ -#endif -#ifdef PNG_WRITE_INVERT_SUPPORTED -# define TRANSFORM_RW_INVERT TRANSFORM_RW -#else -# define TRANSFORM_RW_INVERT TRANSFORM_R -#endif -#ifdef PNG_READ_INVERT_SUPPORTED - T(INVERT_MONO, NONE, X, C, ALL, RW_INVERT), - /* converts gray-scale components to 1..0 from 0..1 */ -#endif -#ifdef PNG_WRITE_SHIFT_SUPPORTED -# define TRANSFORM_RW_SHIFT TRANSFORM_RW -#else -# define TRANSFORM_RW_SHIFT TRANSFORM_R -#endif -#ifdef PNG_READ_SHIFT_SUPPORTED - T(SHIFT, sBIT, X, X, ALL, RW_SHIFT), - /* reduces component values to the original range based on the sBIT chunk, - * this is only partially reversible - the low bits are lost and cannot be - * recovered on write. In fact write code replicates the bits to generate - * new low-order bits. - */ -#endif -#ifdef PNG_WRITE_BGR_SUPPORTED -# define TRANSFORM_RW_BGR TRANSFORM_RW -#else -# define TRANSFORM_RW_BGR TRANSFORM_R -#endif -#ifdef PNG_READ_BGR_SUPPORTED - T(BGR, NONE, C, P, TRUE, RW_BGR), - /* reverses the rgb component values of true-color pixels */ -#endif -#ifdef PNG_WRITE_SWAP_ALPHA_SUPPORTED -# define TRANSFORM_RW_SWAP_ALPHA TRANSFORM_RW -#else -# define TRANSFORM_RW_SWAP_ALPHA TRANSFORM_R -#endif -#ifdef PNG_READ_SWAP_ALPHA_SUPPORTED - T(SWAP_ALPHA, NONE, A, X, TRUE, RW_SWAP_ALPHA), - /* swaps the alpha channel of RGBA or GA pixels to the front - ARGB or - * AG, on write reverses the process. - */ -#endif -#ifdef PNG_WRITE_SWAP_SUPPORTED -# define TRANSFORM_RW_SWAP TRANSFORM_RW -#else -# define TRANSFORM_RW_SWAP TRANSFORM_R -#endif -#ifdef PNG_READ_SWAP_SUPPORTED - T(SWAP_ENDIAN, NONE, X, P, 16, RW_SWAP), - /* byte-swaps 16-bit component values */ -#endif -#ifdef PNG_WRITE_INVERT_ALPHA_SUPPORTED -# define TRANSFORM_RW_INVERT_ALPHA TRANSFORM_RW -#else -# define TRANSFORM_RW_INVERT_ALPHA TRANSFORM_R -#endif -#ifdef PNG_READ_INVERT_ALPHA_SUPPORTED - T(INVERT_ALPHA, NONE, A, X, TRUE, RW_INVERT_ALPHA), - /* converts an alpha channel from 0..1 to 1..0 */ -#endif -#ifdef PNG_WRITE_FILLER_SUPPORTED - T(STRIP_FILLER_BEFORE, NONE, A, P, TRUE, W), /* 'A' for a filler! */ - /* on write skips a leading filler channel; testing requires data with a - * filler channel so this is produced from RGBA or GA images by removing - * the 'alpha' flag from the color type in place. - */ - T(STRIP_FILLER_AFTER, NONE, A, P, TRUE, W), - /* on write strips a trailing filler channel */ -#endif -#ifdef PNG_READ_GRAY_TO_RGB_SUPPORTED - T(GRAY_TO_RGB, NONE, X, C, ALL, R), - /* expands grayscale images to RGB, also causes the palette part of - * 'EXPAND' to happen. Low bit depth grayscale images are expanded to - * 8-bits per component and no attempt is made to convert the image to a - * palette image. While this transform is partially reversible - * png_write_png does not currently support this. - */ - T(GRAY_TO_RGB, NONE, P, X, ALL, R), - /* The 'palette' side effect mentioned above; a bit bogus but this is the - * way the libpng code works. - */ -#endif -#ifdef PNG_READ_EXPAND_16_SUPPORTED - T(EXPAND_16, NONE, X, X, PAL, R), - /* expands images to 16-bits per component, as a side effect expands - * palette images to RGB and expands the tRNS chunk if present, so it can - * modify 16-bit per component images as well: - */ - T(EXPAND_16, tRNS, X, A, 16, R), - /* side effect of EXPAND_16 - expands the tRNS chunk in an RGB or G 16-bit - * image. - */ -#endif -#ifdef PNG_READ_SCALE_16_TO_8_SUPPORTED - T(SCALE_16, NONE, X, X, 16, R), - /* scales 16-bit components to 8-bits. */ -#endif - - { NULL /*name*/, 0, 0, 0, 0, 0, 0, 0/*!tested*/ } - -#undef T -}; - -#define ARRAY_SIZE(a) ((sizeof a)/(sizeof a[0])) -#define TTABLE_SIZE ARRAY_SIZE(transform_info) - -/* Some combinations of options that should be reversible are not; these cases - * are bugs. - */ -static int known_bad_combos[][2] = -{ - /* problem, antidote */ - { PNG_TRANSFORM_SHIFT | PNG_TRANSFORM_INVERT_ALPHA, 0/*antidote*/ } -}; - -static int -is_combo(int transforms) -{ - return transforms & (transforms-1); /* non-zero if more than one set bit */ -} - -static int -first_transform(int transforms) -{ - return transforms & -transforms; /* lowest set bit */ -} - -static int -is_bad_combo(int transforms) -{ - unsigned int i; - - for (i=0; ifirst.next = NULL; - buffer->last = NULL; - buffer->current = NULL; -} - -static void -buffer_destroy_list(struct buffer_list *list) -{ - if (list != NULL) - { - struct buffer_list *next = list->next; - DELETE(list); - buffer_destroy_list(next); - } -} - -static void -buffer_destroy(struct buffer *buffer) -{ - struct buffer_list *list = buffer->first.next; - buffer_init(buffer); - buffer_destroy_list(list); -} - -#ifdef PNG_WRITE_PNG_SUPPORTED -static void -buffer_start_write(struct buffer *buffer) -{ - buffer->last = &buffer->first; - buffer->end_count = 0; - buffer->current = NULL; -} -#endif - -static void -buffer_start_read(struct buffer *buffer) -{ - buffer->current = &buffer->first; - buffer->read_count = 0; -} - -#ifdef ENOMEM /* required by POSIX 1003.1 */ -# define MEMORY ENOMEM -#else -# define MEMORY ERANGE /* required by ANSI-C */ -#endif -static struct buffer * -get_buffer(png_structp pp) - /* Used from libpng callbacks to get the current buffer */ -{ - return (struct buffer*)png_get_io_ptr(pp); -} - -static struct buffer_list * -buffer_extend(struct buffer_list *current) -{ - struct buffer_list *add; - - assert(current->next == NULL); - - add = NEW(struct buffer_list); - if (add == NULL) - return NULL; - - add->next = NULL; - current->next = add; - - return add; -} - -/* Load a buffer from a file; does the equivalent of buffer_start_write. On a - * read error returns an errno value, else returns 0. - */ -static int -buffer_from_file(struct buffer *buffer, FILE *fp) -{ - struct buffer_list *last = &buffer->first; - size_t count = 0; - - for (;;) - { - size_t r = fread(last->buffer+count, 1/*size*/, - (sizeof last->buffer)-count, fp); - - if (r > 0) - { - count += r; - - if (count >= sizeof last->buffer) - { - assert(count == sizeof last->buffer); - count = 0; - - if (last->next == NULL) - { - last = buffer_extend(last); - if (last == NULL) - return MEMORY; - } - - else - last = last->next; - } - } - - else /* fread failed - probably end of file */ - { - if (feof(fp)) - { - buffer->last = last; - buffer->end_count = count; - return 0; /* no error */ - } - - /* Some kind of funky error; errno should be non-zero */ - return errno == 0 ? ERANGE : errno; - } - } -} - -/* This structure is used to control the test of a single file. */ -typedef enum -{ - VERBOSE, /* switches on all messages */ - INFORMATION, - WARNINGS, /* switches on warnings */ - LIBPNG_WARNING, - APP_WARNING, - ERRORS, /* just errors */ - APP_FAIL, /* continuable error - no need to longjmp */ - LIBPNG_ERROR, /* this and higher cause a longjmp */ - LIBPNG_BUG, /* erroneous behavior in libpng */ - APP_ERROR, /* such as out-of-memory in a callback */ - QUIET, /* no normal messages */ - USER_ERROR, /* such as file-not-found */ - INTERNAL_ERROR -} error_level; -#define LEVEL_MASK 0xf /* where the level is in 'options' */ - -#define EXHAUSTIVE 0x010 /* Test all combinations of active options */ -#define STRICT 0x020 /* Fail on warnings as well as errors */ -#define LOG 0x040 /* Log pass/fail to stdout */ -#define CONTINUE 0x080 /* Continue on APP_FAIL errors */ -#define SKIP_BUGS 0x100 /* Skip over known bugs */ -#define LOG_SKIPPED 0x200 /* Log skipped bugs */ -#define FIND_BAD_COMBOS 0x400 /* Attempt to deduce bad combos */ -#define LIST_COMBOS 0x800 /* List combos by name */ - -/* Result masks apply to the result bits in the 'results' field below; these - * bits are simple 1U<options = WARNINGS; /* default to !verbose, !quiet */ - dp->filename = NULL; - dp->operation = NULL; - dp->original_pp = NULL; - dp->original_ip = NULL; - dp->original_rows = NULL; - dp->read_pp = NULL; - dp->read_ip = NULL; - buffer_init(&dp->original_file); - -# ifdef PNG_WRITE_PNG_SUPPORTED - dp->write_pp = NULL; - buffer_init(&dp->written_file); -# endif -} - -static void -display_clean_read(struct display *dp) -{ - if (dp->read_pp != NULL) - png_destroy_read_struct(&dp->read_pp, &dp->read_ip, NULL); -} - -#ifdef PNG_WRITE_PNG_SUPPORTED -static void -display_clean_write(struct display *dp) -{ - if (dp->write_pp != NULL) - png_destroy_write_struct(&dp->write_pp, NULL); -} -#endif - -static void -display_clean(struct display *dp) -{ -# ifdef PNG_WRITE_PNG_SUPPORTED - display_clean_write(dp); -# endif - display_clean_read(dp); - - dp->original_rowbytes = 0; - dp->original_rows = NULL; - dp->chunks = 0; - - png_destroy_read_struct(&dp->original_pp, &dp->original_ip, NULL); - /* leave the filename for error detection */ - dp->results = 0; /* reset for next time */ -} - -static void -display_destroy(struct display *dp) -{ - /* Release any memory held in the display. */ -# ifdef PNG_WRITE_PNG_SUPPORTED - buffer_destroy(&dp->written_file); -# endif - - buffer_destroy(&dp->original_file); -} - -static struct display * -get_dp(png_structp pp) - /* The display pointer is always stored in the png_struct error pointer */ -{ - struct display *dp = (struct display*)png_get_error_ptr(pp); - - if (dp == NULL) - { - fprintf(stderr, "pngimage: internal error (no display)\n"); - exit(99); /* prevents a crash */ - } - - return dp; -} - -/* error handling */ -#ifdef __GNUC__ -# define VGATTR __attribute__((__format__ (__printf__,3,4))) - /* Required to quiet GNUC warnings when the compiler sees a stdarg function - * that calls one of the stdio v APIs. - */ -#else -# define VGATTR -#endif -static void VGATTR -display_log(struct display *dp, error_level level, const char *fmt, ...) - /* 'level' is as above, fmt is a stdio style format string. This routine - * does not return if level is above LIBPNG_WARNING - */ -{ - dp->results |= 1U << level; - - if (level > (error_level)(dp->options & LEVEL_MASK)) - { - const char *lp; - va_list ap; - - switch (level) - { - case INFORMATION: lp = "information"; break; - case LIBPNG_WARNING: lp = "warning(libpng)"; break; - case APP_WARNING: lp = "warning(pngimage)"; break; - case APP_FAIL: lp = "error(continuable)"; break; - case LIBPNG_ERROR: lp = "error(libpng)"; break; - case LIBPNG_BUG: lp = "bug(libpng)"; break; - case APP_ERROR: lp = "error(pngimage)"; break; - case USER_ERROR: lp = "error(user)"; break; - - case INTERNAL_ERROR: /* anything unexpected is an internal error: */ - case VERBOSE: case WARNINGS: case ERRORS: case QUIET: - default: lp = "bug(pngimage)"; break; - } - - fprintf(stderr, "%s: %s: %s", - dp->filename != NULL ? dp->filename : "", lp, dp->operation); - - if (dp->transforms != 0) - { - int tr = dp->transforms; - - if (is_combo(tr)) - { - if (dp->options & LIST_COMBOS) - { - int trx = tr; - - fprintf(stderr, "("); - if (trx) - { - int start = 0; - - while (trx) - { - int trz = trx & -trx; - - if (start) fprintf(stderr, "+"); - fprintf(stderr, "%s", transform_name(trz)); - start = 1; - trx &= ~trz; - } - } - - else - fprintf(stderr, "-"); - fprintf(stderr, ")"); - } - - else - fprintf(stderr, "(0x%x)", tr); - } - - else - fprintf(stderr, "(%s)", transform_name(tr)); - } - - fprintf(stderr, ": "); - - va_start(ap, fmt); - vfprintf(stderr, fmt, ap); - va_end(ap); - - fputc('\n', stderr); - } - /* else do not output any message */ - - /* Errors cause this routine to exit to the fail code */ - if (level > APP_FAIL || (level > ERRORS && !(dp->options & CONTINUE))) - longjmp(dp->error_return, level); -} - -/* error handler callbacks for libpng */ -static void PNGCBAPI -display_warning(png_structp pp, png_const_charp warning) -{ - display_log(get_dp(pp), LIBPNG_WARNING, "%s", warning); -} - -static void PNGCBAPI -display_error(png_structp pp, png_const_charp error) -{ - struct display *dp = get_dp(pp); - - display_log(dp, LIBPNG_ERROR, "%s", error); -} - -static void -display_cache_file(struct display *dp, const char *filename) - /* Does the initial cache of the file. */ -{ - FILE *fp; - int ret; - - dp->filename = filename; - - if (filename != NULL) - { - fp = fopen(filename, "rb"); - if (fp == NULL) - display_log(dp, USER_ERROR, "open failed: %s", strerror(errno)); - } - - else - fp = stdin; - - ret = buffer_from_file(&dp->original_file, fp); - - fclose(fp); - - if (ret != 0) - display_log(dp, APP_ERROR, "read failed: %s", strerror(ret)); -} - -static void -buffer_read(struct display *dp, struct buffer *bp, png_bytep data, - size_t size) -{ - struct buffer_list *last = bp->current; - size_t read_count = bp->read_count; - - while (size > 0) - { - size_t avail; - - if (last == NULL || - (last == bp->last && read_count >= bp->end_count)) - { - display_log(dp, USER_ERROR, "file truncated (%lu bytes)", - (unsigned long)size); - /*NOTREACHED*/ - break; - } - - else if (read_count >= sizeof last->buffer) - { - /* Move to the next buffer: */ - last = last->next; - read_count = 0; - bp->current = last; /* Avoid update outside the loop */ - - /* And do a sanity check (the EOF case is caught above) */ - if (last == NULL) - { - display_log(dp, INTERNAL_ERROR, "damaged buffer list"); - /*NOTREACHED*/ - break; - } - } - - avail = (sizeof last->buffer) - read_count; - if (avail > size) - avail = size; - - memcpy(data, last->buffer + read_count, avail); - read_count += avail; - size -= avail; - data += avail; - } - - bp->read_count = read_count; -} - -static void PNGCBAPI -read_function(png_structp pp, png_bytep data, size_t size) -{ - buffer_read(get_dp(pp), get_buffer(pp), data, size); -} - -static void -read_png(struct display *dp, struct buffer *bp, const char *operation, - int transforms) -{ - png_structp pp; - png_infop ip; - - /* This cleans out any previous read and sets operation and transforms to - * empty. - */ - display_clean_read(dp); - - if (operation != NULL) /* else this is a verify and do not overwrite info */ - { - dp->operation = operation; - dp->transforms = transforms; - } - - dp->read_pp = pp = png_create_read_struct(PNG_LIBPNG_VER_STRING, dp, - display_error, display_warning); - if (pp == NULL) - display_log(dp, LIBPNG_ERROR, "failed to create read struct"); - - /* The png_read_png API requires us to make the info struct, but it does the - * call to png_read_info. - */ - dp->read_ip = ip = png_create_info_struct(pp); - if (ip == NULL) - display_log(dp, LIBPNG_ERROR, "failed to create info struct"); - -# ifdef PNG_SET_USER_LIMITS_SUPPORTED - /* Remove the user limits, if any */ - png_set_user_limits(pp, 0x7fffffff, 0x7fffffff); -# endif - - /* Set the IO handling */ - buffer_start_read(bp); - png_set_read_fn(pp, bp, read_function); - - png_read_png(pp, ip, transforms, NULL/*params*/); - -#if 0 /* crazy debugging */ - { - png_bytep pr = png_get_rows(pp, ip)[0]; - size_t rb = png_get_rowbytes(pp, ip); - size_t cb; - char c = ' '; - - fprintf(stderr, "%.4x %2d (%3lu bytes):", transforms, png_get_bit_depth(pp,ip), (unsigned long)rb); - - for (cb=0; cboriginal_file, "original read", 0/*no transform*/); - - /* Move the result to the 'original' fields */ - dp->original_pp = pp = dp->read_pp, dp->read_pp = NULL; - dp->original_ip = ip = dp->read_ip, dp->read_ip = NULL; - - dp->original_rowbytes = png_get_rowbytes(pp, ip); - if (dp->original_rowbytes == 0) - display_log(dp, LIBPNG_BUG, "png_get_rowbytes returned 0"); - - dp->chunks = png_get_valid(pp, ip, 0xffffffff); - if ((dp->chunks & PNG_INFO_IDAT) == 0) /* set by png_read_png */ - display_log(dp, LIBPNG_BUG, "png_read_png did not set IDAT flag"); - - dp->original_rows = png_get_rows(pp, ip); - if (dp->original_rows == NULL) - display_log(dp, LIBPNG_BUG, "png_read_png did not create row buffers"); - - if (!png_get_IHDR(pp, ip, - &dp->width, &dp->height, &dp->bit_depth, &dp->color_type, - &dp->interlace_method, &dp->compression_method, &dp->filter_method)) - display_log(dp, LIBPNG_BUG, "png_get_IHDR failed"); - - /* 'active' transforms are discovered based on the original image format; - * running one active transform can activate others. At present the code - * does not attempt to determine the closure. - */ - { - png_uint_32 chunks = dp->chunks; - int active = 0, inactive = 0; - int ct = dp->color_type; - int bd = dp->bit_depth; - unsigned int i; - - for (i=0; iactive_transforms = active; - dp->ignored_transforms = inactive; /* excluding write-only transforms */ - } -} - -static int -compare_read(struct display *dp, int applied_transforms) -{ - /* Compare the png_info from read_ip with original_info */ - size_t rowbytes; - png_uint_32 width, height; - int bit_depth, color_type; - int interlace_method, compression_method, filter_method; - const char *e = NULL; - - png_get_IHDR(dp->read_pp, dp->read_ip, &width, &height, &bit_depth, - &color_type, &interlace_method, &compression_method, &filter_method); - -# define C(item) if (item != dp->item) \ - display_log(dp, APP_WARNING, "IHDR " #item "(%lu) changed to %lu",\ - (unsigned long)dp->item, (unsigned long)item), e = #item - - /* The IHDR should be identical: */ - C(width); - C(height); - C(bit_depth); - C(color_type); - C(interlace_method); - C(compression_method); - C(filter_method); - - /* 'e' remains set to the name of the last thing changed: */ - if (e) - display_log(dp, APP_ERROR, "IHDR changed (%s)", e); - - /* All the chunks from the original PNG should be preserved in the output PNG - * because the PNG format has not been changed. - */ - { - unsigned long chunks = - png_get_valid(dp->read_pp, dp->read_ip, 0xffffffff); - - if (chunks != dp->chunks) - display_log(dp, APP_FAIL, "PNG chunks changed from 0x%lx to 0x%lx", - (unsigned long)dp->chunks, chunks); - } - - /* rowbytes should be the same */ - rowbytes = png_get_rowbytes(dp->read_pp, dp->read_ip); - - /* NOTE: on 64-bit systems this may trash the top bits of rowbytes, - * which could lead to weird error messages. - */ - if (rowbytes != dp->original_rowbytes) - display_log(dp, APP_ERROR, "PNG rowbytes changed from %lu to %lu", - (unsigned long)dp->original_rowbytes, (unsigned long)rowbytes); - - /* The rows should be the same too, unless the applied transforms includes - * the shift transform, in which case low bits may have been lost. - */ - { - png_bytepp rows = png_get_rows(dp->read_pp, dp->read_ip); - unsigned int mask; /* mask (if not zero) for the final byte */ - - if (bit_depth < 8) - { - /* Need the stray bits at the end, this depends only on the low bits - * of the image width; overflow does not matter. If the width is an - * exact multiple of 8 bits this gives a mask of 0, not 0xff. - */ - mask = 0xff & (0xff00 >> ((bit_depth * width) & 7)); - } - - else - mask = 0; - - if (rows == NULL) - display_log(dp, LIBPNG_BUG, "png_get_rows returned NULL"); - - if ((applied_transforms & PNG_TRANSFORM_SHIFT) == 0 || - (dp->active_transforms & PNG_TRANSFORM_SHIFT) == 0 || - color_type == PNG_COLOR_TYPE_PALETTE) - { - unsigned long y; - - for (y=0; yoriginal_rows[y]; - - if (memcmp(row, orig, rowbytes-(mask != 0)) != 0 || (mask != 0 && - ((row[rowbytes-1] & mask) != (orig[rowbytes-1] & mask)))) - { - size_t x; - - /* Find the first error */ - for (x=0; x 0x%.2x", - (unsigned long)x, (unsigned long)y, orig[x], row[x]); - return 0; /* don't keep reporting failed rows on 'continue' */ - } - } - } - - else -# ifdef PNG_sBIT_SUPPORTED - { - unsigned long y; - int bpp; /* bits-per-pixel then bytes-per-pixel */ - /* components are up to 8 bytes in size */ - png_byte sig_bits[8]; - png_color_8p sBIT; - - if (png_get_sBIT(dp->read_pp, dp->read_ip, &sBIT) != PNG_INFO_sBIT) - display_log(dp, INTERNAL_ERROR, - "active shift transform but no sBIT in file"); - - switch (color_type) - { - case PNG_COLOR_TYPE_GRAY: - sig_bits[0] = sBIT->gray; - bpp = bit_depth; - break; - - case PNG_COLOR_TYPE_GA: - sig_bits[0] = sBIT->gray; - sig_bits[1] = sBIT->alpha; - bpp = 2 * bit_depth; - break; - - case PNG_COLOR_TYPE_RGB: - sig_bits[0] = sBIT->red; - sig_bits[1] = sBIT->green; - sig_bits[2] = sBIT->blue; - bpp = 3 * bit_depth; - break; - - case PNG_COLOR_TYPE_RGBA: - sig_bits[0] = sBIT->red; - sig_bits[1] = sBIT->green; - sig_bits[2] = sBIT->blue; - sig_bits[3] = sBIT->alpha; - bpp = 4 * bit_depth; - break; - - default: - display_log(dp, LIBPNG_ERROR, "invalid colour type %d", - color_type); - /*NOTREACHED*/ - bpp = 0; - break; - } - - { - int b; - - for (b=0; 8*b bit_depth/*!palette*/) - display_log(dp, LIBPNG_BUG, - "invalid sBIT[%u] value %d returned for PNG bit depth %d", - b, sig_bits[b], bit_depth); - } - } - - if (bpp < 8 && bpp != bit_depth) - { - /* sanity check; this is a grayscale PNG; something is wrong in the - * code above. - */ - display_log(dp, INTERNAL_ERROR, "invalid bpp %u for bit_depth %u", - bpp, bit_depth); - } - - switch (bit_depth) - { - int b; - - case 16: /* Two bytes per component, big-endian */ - for (b = (bpp >> 4); b > 0; --b) - { - unsigned int sig = (unsigned int)(0xffff0000 >> sig_bits[b]); - - sig_bits[2*b+1] = (png_byte)sig; - sig_bits[2*b+0] = (png_byte)(sig >> 8); /* big-endian */ - } - break; - - case 8: /* One byte per component */ - for (b=0; b*8 < bpp; ++b) - sig_bits[b] = (png_byte)(0xff00 >> sig_bits[b]); - break; - - case 1: /* allowed, but dumb */ - /* Value is 1 */ - sig_bits[0] = 0xff; - break; - - case 2: /* Replicate 4 times */ - /* Value is 1 or 2 */ - b = 0x3 & ((0x3<<2) >> sig_bits[0]); - b |= b << 2; - b |= b << 4; - sig_bits[0] = (png_byte)b; - break; - - case 4: /* Relicate twice */ - /* Value is 1, 2, 3 or 4 */ - b = 0xf & ((0xf << 4) >> sig_bits[0]); - b |= b << 4; - sig_bits[0] = (png_byte)b; - break; - - default: - display_log(dp, LIBPNG_BUG, "invalid bit depth %d", bit_depth); - break; - } - - /* Convert bpp to bytes; this gives '1' for low-bit depth grayscale, - * where there are multiple pixels per byte. - */ - bpp = (bpp+7) >> 3; - - /* The mask can be combined with sig_bits[0] */ - if (mask != 0) - { - mask &= sig_bits[0]; - - if (bpp != 1 || mask == 0) - display_log(dp, INTERNAL_ERROR, "mask calculation error %u, %u", - bpp, mask); - } - - for (y=0; yoriginal_rows[y]; - unsigned long x; - - for (x=0; x<(width-(mask!=0)); ++x) - { - int b; - - for (b=0; b%.2x", - x, b, y, orig[-1], row[-1]); - return 0; - } - } - } - - if (mask != 0 && (*row & mask) != (*orig & mask)) - { - display_log(dp, APP_FAIL, - "significant bits at (%lu[end],%lu) changed", x, y); - return 0; - } - } /* for y */ - } -# else /* !sBIT */ - display_log(dp, INTERNAL_ERROR, - "active shift transform but no sBIT support"); -# endif /* !sBIT */ - } - - return 1; /* compare succeeded */ -} - -#ifdef PNG_WRITE_PNG_SUPPORTED -static void -buffer_write(struct display *dp, struct buffer *buffer, png_bytep data, - size_t size) - /* Generic write function used both from the write callback provided to - * libpng and from the generic read code. - */ -{ - /* Write the data into the buffer, adding buffers as required */ - struct buffer_list *last = buffer->last; - size_t end_count = buffer->end_count; - - while (size > 0) - { - size_t avail; - - if (end_count >= sizeof last->buffer) - { - if (last->next == NULL) - { - last = buffer_extend(last); - - if (last == NULL) - display_log(dp, APP_ERROR, "out of memory saving file"); - } - - else - last = last->next; - - buffer->last = last; /* avoid the need to rewrite every time */ - end_count = 0; - } - - avail = (sizeof last->buffer) - end_count; - if (avail > size) - avail = size; - - memcpy(last->buffer + end_count, data, avail); - end_count += avail; - size -= avail; - data += avail; - } - - buffer->end_count = end_count; -} - -static void PNGCBAPI -write_function(png_structp pp, png_bytep data, size_t size) -{ - buffer_write(get_dp(pp), get_buffer(pp), data, size); -} - -static void -write_png(struct display *dp, png_infop ip, int transforms) -{ - display_clean_write(dp); /* safety */ - - buffer_start_write(&dp->written_file); - dp->operation = "write"; - dp->transforms = transforms; - - dp->write_pp = png_create_write_struct(PNG_LIBPNG_VER_STRING, dp, - display_error, display_warning); - - if (dp->write_pp == NULL) - display_log(dp, APP_ERROR, "failed to create write png_struct"); - - png_set_write_fn(dp->write_pp, &dp->written_file, write_function, - NULL/*flush*/); - -# ifdef PNG_SET_USER_LIMITS_SUPPORTED - /* Remove the user limits, if any */ - png_set_user_limits(dp->write_pp, 0x7fffffff, 0x7fffffff); -# endif - - /* Certain transforms require the png_info to be zapped to allow the - * transform to work correctly. - */ - if (transforms & (PNG_TRANSFORM_PACKING| - PNG_TRANSFORM_STRIP_FILLER| - PNG_TRANSFORM_STRIP_FILLER_BEFORE)) - { - int ct = dp->color_type; - - if (transforms & (PNG_TRANSFORM_STRIP_FILLER| - PNG_TRANSFORM_STRIP_FILLER_BEFORE)) - ct &= ~PNG_COLOR_MASK_ALPHA; - - png_set_IHDR(dp->write_pp, ip, dp->width, dp->height, dp->bit_depth, ct, - dp->interlace_method, dp->compression_method, dp->filter_method); - } - - png_write_png(dp->write_pp, ip, transforms, NULL/*params*/); - - /* Clean it on the way out - if control returns to the caller then the - * written_file contains the required data. - */ - display_clean_write(dp); -} -#endif /* WRITE_PNG */ - -static int -skip_transform(struct display *dp, int tr) - /* Helper to test for a bad combo and log it if it is skipped */ -{ - if ((dp->options & SKIP_BUGS) != 0 && is_bad_combo(tr)) - { - /* Log this to stdout if logging is on, otherwise just do an information - * display_log. - */ - if ((dp->options & LOG_SKIPPED) != 0) - { - printf("SKIP: %s transforms ", dp->filename); - - while (tr != 0) - { - int next = first_transform(tr); - tr &= ~next; - - printf("%s", transform_name(next)); - if (tr != 0) - putchar('+'); - } - - putchar('\n'); - } - - else - display_log(dp, INFORMATION, "%s: skipped known bad combo 0x%x", - dp->filename, tr); - - return 1; /* skip */ - } - - return 0; /* don't skip */ -} - -static void -test_one_file(struct display *dp, const char *filename) -{ - /* First cache the file and update the display original file - * information for the new file. - */ - dp->operation = "cache file"; - dp->transforms = 0; - display_cache_file(dp, filename); - update_display(dp); - - /* First test: if there are options that should be ignored for this file - * verify that they really are ignored. - */ - if (dp->ignored_transforms != 0) - { - read_png(dp, &dp->original_file, "ignored transforms", - dp->ignored_transforms); - - /* The result should be identical to the original_rows */ - if (!compare_read(dp, 0/*transforms applied*/)) - return; /* no point testing more */ - } - -#ifdef PNG_WRITE_PNG_SUPPORTED - /* Second test: write the original PNG data out to a new file (to test the - * write side) then read the result back in and make sure that it hasn't - * changed. - */ - dp->operation = "write"; - write_png(dp, dp->original_ip, 0/*transforms*/); - read_png(dp, &dp->written_file, NULL, 0/*transforms*/); - if (!compare_read(dp, 0/*transforms applied*/)) - return; -#endif - - /* Third test: the active options. Test each in turn, or, with the - * EXHAUSTIVE option, test all possible combinations. - */ - { - /* Use unsigned int here because the code below to increment through all - * the possibilities exhaustively has to use a compare and that must be - * unsigned, because some transforms are negative on a 16-bit system. - */ - unsigned int active = dp->active_transforms; - int exhaustive = (dp->options & EXHAUSTIVE) != 0; - unsigned int current = first_transform(active); - unsigned int bad_transforms = 0; - unsigned int bad_combo = ~0U; /* bitwise AND of failing transforms */ - unsigned int bad_combo_list = 0; /* bitwise OR of failures */ - - for (;;) - { - read_png(dp, &dp->original_file, "active transforms", current); - - /* If this involved any irreversible transformations then if we write - * it out with just the reversible transformations and read it in again - * with the same transforms we should get the same thing. At present - * this isn't done - it just seems like a waste of time and it would - * require two sets of read png_struct/png_info. - * - * If there were no irreversible transformations then if we write it - * out and read it back in again (without the reversible transforms) - * we should get back to the place where we started. - */ -#ifdef PNG_WRITE_PNG_SUPPORTED - if ((current & write_transforms) == current) - { - /* All transforms reversible: write the PNG with the transformations - * reversed, then read it back in with no transformations. The - * result should be the same as the original apart from the loss of - * low order bits because of the SHIFT/sBIT transform. - */ - dp->operation = "reversible transforms"; - write_png(dp, dp->read_ip, current); - - /* And if this is read back in, because all the transformations were - * reversible, the result should be the same. - */ - read_png(dp, &dp->written_file, NULL, 0); - if (!compare_read(dp, current/*for the SHIFT/sBIT transform*/)) - { - /* This set of transforms failed. If a single bit is set - if - * there is just one transform - don't include this in further - * 'exhaustive' tests. Notice that each transform is tested on - * its own before testing combos in the exhaustive case. - */ - if (is_combo(current)) - { - bad_combo &= current; - bad_combo_list |= current; - } - - else - bad_transforms |= current; - } - } -#endif - - /* Now move to the next transform */ - if (exhaustive) /* all combinations */ - { - unsigned int next = current; - - do - { - if (next == read_transforms) /* Everything tested */ - goto combo; - - ++next; - } /* skip known bad combos if the relevant option is set; skip - * combos involving known bad single transforms in all cases. - */ - while ( (next & read_transforms) <= current - || (next & active) == 0 /* skip cases that do nothing */ - || (next & bad_transforms) != 0 - || skip_transform(dp, next)); - - assert((next & read_transforms) == next); - current = next; - } - - else /* one at a time */ - { - active &= ~current; - - if (active == 0) - goto combo; - - current = first_transform(active); - } - } - -combo: - if (dp->options & FIND_BAD_COMBOS) - { - /* bad_combos identifies the combos that occur in all failing cases; - * bad_combo_list identifies transforms that do not prevent the - * failure. - */ - if (bad_combo != ~0U) - printf("%s[0x%x]: PROBLEM: 0x%x[0x%x] ANTIDOTE: 0x%x\n", - dp->filename, active, bad_combo, bad_combo_list, - rw_transforms & ~bad_combo_list); - - else - printf("%s: no %sbad combos found\n", dp->filename, - (dp->options & SKIP_BUGS) ? "additional " : ""); - } - } -} - -static int -do_test(struct display *dp, const char *file) - /* Exists solely to isolate the setjmp clobbers */ -{ - int ret = setjmp(dp->error_return); - - if (ret == 0) - { - test_one_file(dp, file); - return 0; - } - - else if (ret < ERRORS) /* shouldn't longjmp on warnings */ - display_log(dp, INTERNAL_ERROR, "unexpected return code %d", ret); - - return ret; -} - -int -main(int argc, char **argv) -{ - /* For each file on the command line test it with a range of transforms */ - int option_end, ilog = 0; - struct display d; - - validate_T(); - display_init(&d); - - for (option_end=1; option_end QUIET) /* abort on user or internal error */ - return 99; - } - - /* Here on any return, including failures, except user/internal issues - */ - { - int pass = (d.options & STRICT) ? - RESULT_STRICT(d.results) : RESULT_RELAXED(d.results); - - if (!pass) - ++errors; - - if (d.options & LOG) - { - int j; - - printf("%s: pngimage ", pass ? "PASS" : "FAIL"); - - for (j=1; j -#include -#include -#include -#include -#include -#include - -#if defined(HAVE_CONFIG_H) && !defined(PNG_NO_CONFIG_H) -# include -#endif - -/* Define the following to use this test against your installed libpng, rather - * than the one being built here: - */ -#ifdef PNG_FREESTANDING_TESTS -# include -#else -# include "../../png.h" -#endif - -/* 1.6.1 added support for the configure test harness, which uses 77 to indicate - * a skipped test, in earlier versions we need to succeed on a skipped test, so: - */ -#if PNG_LIBPNG_VER >= 10601 && defined(HAVE_CONFIG_H) -# define SKIP 77 -#else -# define SKIP 0 -#endif - -#ifdef PNG_SIMPLIFIED_READ_SUPPORTED /* Else nothing can be done */ -#include "../tools/sRGB.h" - -/* KNOWN ISSUES - * - * These defines switch on alternate algorithms for format conversions to match - * the current libpng implementation; they are set to allow pngstest to pass - * even though libpng is producing answers that are not as correct as they - * should be. - */ -#define ALLOW_UNUSED_GPC 0 - /* If true include unused static GPC functions and declare an external array - * of them to hide the fact that they are unused. This is for development - * use while testing the correct function to use to take into account libpng - * misbehavior, such as using a simple power law to correct sRGB to linear. - */ - -/* The following is to support direct compilation of this file as C++ */ -#ifdef __cplusplus -# define voidcast(type, value) static_cast(value) -# define aligncastconst(type, value) \ - static_cast(static_cast(value)) -#else -# define voidcast(type, value) (value) -# define aligncastconst(type, value) ((const void*)(value)) -#endif /* __cplusplus */ - -/* During parallel runs of pngstest each temporary file needs a unique name, - * this is used to permit uniqueness using a command line argument which can be - * up to 22 characters long. - */ -static char tmpf[23] = "TMP"; - -/* Generate random bytes. This uses a boring repeatable algorithm and it - * is implemented here so that it gives the same set of numbers on every - * architecture. It's a linear congruential generator (Knuth or Sedgewick - * "Algorithms") but it comes from the 'feedback taps' table in Horowitz and - * Hill, "The Art of Electronics". - */ -static void -make_random_bytes(png_uint_32* seed, void* pv, size_t size) -{ - png_uint_32 u0 = seed[0], u1 = seed[1]; - png_bytep bytes = voidcast(png_bytep, pv); - - /* There are thirty three bits, the next bit in the sequence is bit-33 XOR - * bit-20. The top 1 bit is in u1, the bottom 32 are in u0. - */ - size_t i; - for (i=0; i> (20-8)) ^ ((u1 << 7) | (u0 >> (32-7)))) & 0xff; - u1 <<= 8; - u1 |= u0 >> 24; - u0 <<= 8; - u0 |= u; - *bytes++ = (png_byte)u; - } - - seed[0] = u0; - seed[1] = u1; -} - -static png_uint_32 color_seed[2]; - -static void -reseed(void) -{ - color_seed[0] = 0x12345678U; - color_seed[1] = 0x9abcdefU; -} - -static void -random_color(png_colorp color) -{ - make_random_bytes(color_seed, color, sizeof *color); -} - -/* Math support - neither Cygwin nor Visual Studio have C99 support and we need - * a predictable rounding function, so make one here: - */ -static double -closestinteger(double x) -{ - return floor(x + .5); -} - -/* Cast support: remove GCC whines. */ -static png_byte -u8d(double d) -{ - d = closestinteger(d); - return (png_byte)d; -} - -static png_uint_16 -u16d(double d) -{ - d = closestinteger(d); - return (png_uint_16)d; -} - -/* sRGB support: use exact calculations rounded to the nearest int, see the - * fesetround() call in main(). sRGB_to_d optimizes the 8 to 16-bit conversion. - */ -static double sRGB_to_d[256]; -static double g22_to_d[256]; - -static void -init_sRGB_to_d(void) -{ - int i; - - sRGB_to_d[0] = 0; - for (i=1; i<255; ++i) - sRGB_to_d[i] = linear_from_sRGB(i/255.); - sRGB_to_d[255] = 1; - - g22_to_d[0] = 0; - for (i=1; i<255; ++i) - g22_to_d[i] = pow(i/255., 1/.45455); - g22_to_d[255] = 1; -} - -static png_byte -sRGB(double linear /*range 0.0 .. 1.0*/) -{ - return u8d(255 * sRGB_from_linear(linear)); -} - -static png_byte -isRGB(int fixed_linear) -{ - return sRGB(fixed_linear / 65535.); -} - -#if 0 /* not used */ -static png_byte -unpremultiply(int component, int alpha) -{ - if (alpha <= component) - return 255; /* Arbitrary, but consistent with the libpng code */ - - else if (alpha >= 65535) - return isRGB(component); - - else - return sRGB((double)component / alpha); -} -#endif - -static png_uint_16 -ilinear(int fixed_srgb) -{ - return u16d(65535 * sRGB_to_d[fixed_srgb]); -} - -static png_uint_16 -ilineara(int fixed_srgb, int alpha) -{ - return u16d((257 * alpha) * sRGB_to_d[fixed_srgb]); -} - -static png_uint_16 -ilinear_g22(int fixed_srgb) -{ - return u16d(65535 * g22_to_d[fixed_srgb]); -} - -#if ALLOW_UNUSED_GPC -static png_uint_16 -ilineara_g22(int fixed_srgb, int alpha) -{ - return u16d((257 * alpha) * g22_to_d[fixed_srgb]); -} -#endif - -static double -YfromRGBint(int ir, int ig, int ib) -{ - double r = ir; - double g = ig; - double b = ib; - return YfromRGB(r, g, b); -} - -#if 0 /* unused */ -/* The error that results from using a 2.2 power law in place of the correct - * sRGB transform, given an 8-bit value which might be either sRGB or power-law. - */ -static int -power_law_error8(int value) -{ - if (value > 0 && value < 255) - { - double vd = value / 255.; - double e = fabs( - pow(sRGB_to_d[value], 1/2.2) - sRGB_from_linear(pow(vd, 2.2))); - - /* Always allow an extra 1 here for rounding errors */ - e = 1+floor(255 * e); - return (int)e; - } - - return 0; -} - -static int error_in_sRGB_roundtrip = 56; /* by experiment */ -static int -power_law_error16(int value) -{ - if (value > 0 && value < 65535) - { - /* Round trip the value through an 8-bit representation but using - * non-matching to/from conversions. - */ - double vd = value / 65535.; - double e = fabs( - pow(sRGB_from_linear(vd), 2.2) - linear_from_sRGB(pow(vd, 1/2.2))); - - /* Always allow an extra 1 here for rounding errors */ - e = error_in_sRGB_roundtrip+floor(65535 * e); - return (int)e; - } - - return 0; -} - -static int -compare_8bit(int v1, int v2, int error_limit, int multiple_algorithms) -{ - int e = abs(v1-v2); - int ev1, ev2; - - if (e <= error_limit) - return 1; - - if (!multiple_algorithms) - return 0; - - ev1 = power_law_error8(v1); - if (e <= ev1) - return 1; - - ev2 = power_law_error8(v2); - if (e <= ev2) - return 1; - - return 0; -} - -static int -compare_16bit(int v1, int v2, int error_limit, int multiple_algorithms) -{ - int e = abs(v1-v2); - int ev1, ev2; - - if (e <= error_limit) - return 1; - - /* "multiple_algorithms" in this case means that a color-map has been - * involved somewhere, so we can deduce that the values were forced to 8-bit - * (like the via_linear case for 8-bit.) - */ - if (!multiple_algorithms) - return 0; - - ev1 = power_law_error16(v1); - if (e <= ev1) - return 1; - - ev2 = power_law_error16(v2); - if (e <= ev2) - return 1; - - return 0; -} -#endif /* unused */ - -#define USE_FILE 1 /* else memory */ -#define USE_STDIO 2 /* else use file name */ -#define STRICT 4 /* fail on warnings too */ -#define VERBOSE 8 -#define KEEP_TMPFILES 16 /* else delete temporary files */ -#define KEEP_GOING 32 -#define ACCUMULATE 64 -#define FAST_WRITE 128 -#define sRGB_16BIT 256 -#define NO_RESEED 512 /* do not reseed on each new file */ -#define GBG_ERROR 1024 /* do not ignore the gamma+background_rgb_to_gray - * libpng warning. */ - -static void -print_opts(png_uint_32 opts) -{ - if (opts & USE_FILE) - printf(" --file"); - if (opts & USE_STDIO) - printf(" --stdio"); - if (!(opts & STRICT)) - printf(" --nostrict"); - if (opts & VERBOSE) - printf(" --verbose"); - if (opts & KEEP_TMPFILES) - printf(" --preserve"); - if (opts & KEEP_GOING) - printf(" --keep-going"); - if (opts & ACCUMULATE) - printf(" --accumulate"); - if (!(opts & FAST_WRITE)) /* --fast is currently the default */ - printf(" --slow"); - if (opts & sRGB_16BIT) - printf(" --sRGB-16bit"); - if (opts & NO_RESEED) - printf(" --noreseed"); -#if PNG_LIBPNG_VER < 10700 /* else on by default */ - if (opts & GBG_ERROR) - printf(" --fault-gbg-warning"); -#endif -} - -#define FORMAT_NO_CHANGE 0x80000000 /* additional flag */ - -/* A name table for all the formats - defines the format of the '+' arguments to - * pngstest. - */ -#define FORMAT_COUNT 64 -#define FORMAT_MASK 0x3f -static const char * const format_names[FORMAT_COUNT] = -{ - "sRGB-gray", - "sRGB-gray+alpha", - "sRGB-rgb", - "sRGB-rgb+alpha", - "linear-gray", - "linear-gray+alpha", - "linear-rgb", - "linear-rgb+alpha", - - "color-mapped-sRGB-gray", - "color-mapped-sRGB-gray+alpha", - "color-mapped-sRGB-rgb", - "color-mapped-sRGB-rgb+alpha", - "color-mapped-linear-gray", - "color-mapped-linear-gray+alpha", - "color-mapped-linear-rgb", - "color-mapped-linear-rgb+alpha", - - "sRGB-gray", - "sRGB-gray+alpha", - "sRGB-bgr", - "sRGB-bgr+alpha", - "linear-gray", - "linear-gray+alpha", - "linear-bgr", - "linear-bgr+alpha", - - "color-mapped-sRGB-gray", - "color-mapped-sRGB-gray+alpha", - "color-mapped-sRGB-bgr", - "color-mapped-sRGB-bgr+alpha", - "color-mapped-linear-gray", - "color-mapped-linear-gray+alpha", - "color-mapped-linear-bgr", - "color-mapped-linear-bgr+alpha", - - "sRGB-gray", - "alpha+sRGB-gray", - "sRGB-rgb", - "alpha+sRGB-rgb", - "linear-gray", - "alpha+linear-gray", - "linear-rgb", - "alpha+linear-rgb", - - "color-mapped-sRGB-gray", - "color-mapped-alpha+sRGB-gray", - "color-mapped-sRGB-rgb", - "color-mapped-alpha+sRGB-rgb", - "color-mapped-linear-gray", - "color-mapped-alpha+linear-gray", - "color-mapped-linear-rgb", - "color-mapped-alpha+linear-rgb", - - "sRGB-gray", - "alpha+sRGB-gray", - "sRGB-bgr", - "alpha+sRGB-bgr", - "linear-gray", - "alpha+linear-gray", - "linear-bgr", - "alpha+linear-bgr", - - "color-mapped-sRGB-gray", - "color-mapped-alpha+sRGB-gray", - "color-mapped-sRGB-bgr", - "color-mapped-alpha+sRGB-bgr", - "color-mapped-linear-gray", - "color-mapped-alpha+linear-gray", - "color-mapped-linear-bgr", - "color-mapped-alpha+linear-bgr", -}; - -/* Decode an argument to a format number. */ -static png_uint_32 -formatof(const char *arg) -{ - char *ep; - unsigned long format = strtoul(arg, &ep, 0); - - if (ep > arg && *ep == 0 && format < FORMAT_COUNT) - return (png_uint_32)format; - - else for (format=0; format < FORMAT_COUNT; ++format) - { - if (strcmp(format_names[format], arg) == 0) - return (png_uint_32)format; - } - - fprintf(stderr, "pngstest: format name '%s' invalid\n", arg); - return FORMAT_COUNT; -} - -/* Bitset/test functions for formats */ -#define FORMAT_SET_COUNT (FORMAT_COUNT / 32) -typedef struct -{ - png_uint_32 bits[FORMAT_SET_COUNT]; -} -format_list; - -static void format_init(format_list *pf) -{ - int i; - for (i=0; ibits[i] = 0; /* All off */ -} - -#if 0 /* currently unused */ -static void format_clear(format_list *pf) -{ - int i; - for (i=0; ibits[i] = 0; -} -#endif - -static int format_is_initial(format_list *pf) -{ - int i; - for (i=0; ibits[i] != 0) - return 0; - - return 1; -} - -static int format_set(format_list *pf, png_uint_32 format) -{ - if (format < FORMAT_COUNT) - return pf->bits[format >> 5] |= ((png_uint_32)1) << (format & 31); - - return 0; -} - -#if 0 /* currently unused */ -static int format_unset(format_list *pf, png_uint_32 format) -{ - if (format < FORMAT_COUNT) - return pf->bits[format >> 5] &= ~((png_uint_32)1) << (format & 31); - - return 0; -} -#endif - -static int format_isset(format_list *pf, png_uint_32 format) -{ - return format < FORMAT_COUNT && - (pf->bits[format >> 5] & (((png_uint_32)1) << (format & 31))) != 0; -} - -static void format_default(format_list *pf, int redundant) -{ - if (redundant) - { - int i; - - /* set everything, including flags that are pointless */ - for (i=0; ibits[i] = ~(png_uint_32)0; - } - - else - { - png_uint_32 f; - - for (f=0; finput_file != NULL) - rewind(image->input_file); -} - -/* Free the image buffer; the buffer is re-used on a re-read, this is just for - * cleanup. - */ -static void -freebuffer(Image *image) -{ - if (image->buffer) free(image->buffer); - image->buffer = NULL; - image->bufsize = 0; - image->allocsize = 0; -} - -/* Delete function; cleans out all the allocated data and the temporary file in - * the image. - */ -static void -freeimage(Image *image) -{ - freebuffer(image); - png_image_free(&image->image); - - if (image->input_file != NULL) - { - fclose(image->input_file); - image->input_file = NULL; - } - - if (image->input_memory != NULL) - { - free(image->input_memory); - image->input_memory = NULL; - image->input_memory_size = 0; - } - - if (image->tmpfile_name[0] != 0 && (image->opts & KEEP_TMPFILES) == 0) - { - (void)remove(image->tmpfile_name); - image->tmpfile_name[0] = 0; - } -} - -/* This is actually a re-initializer; allows an image structure to be re-used by - * freeing everything that relates to an old image. - */ -static void initimage(Image *image, png_uint_32 opts, const char *file_name, - int stride_extra) -{ - freeimage(image); - memset(&image->image, 0, sizeof image->image); - image->opts = opts; - image->file_name = file_name; - image->stride_extra = stride_extra; -} - -/* Make sure the image buffer is big enough; allows re-use of the buffer if the - * image is re-read. - */ -#define BUFFER_INIT8 73 -static void -allocbuffer(Image *image) -{ - size_t size = PNG_IMAGE_BUFFER_SIZE(image->image, image->stride); - - if (size+32 > image->bufsize) - { - freebuffer(image); - image->buffer = voidcast(png_bytep, malloc(size+32)); - if (image->buffer == NULL) - { - fflush(stdout); - fprintf(stderr, - "simpletest: out of memory allocating %lu(+32) byte buffer\n", - (unsigned long)size); - exit(1); - } - image->bufsize = size+32; - } - - memset(image->buffer, 95, image->bufsize); - memset(image->buffer+16, BUFFER_INIT8, size); - image->allocsize = size; -} - -/* Make sure 16 bytes match the given byte. */ -static int -check16(png_const_bytep bp, int b) -{ - int i = 16; - - do - if (*bp != b) return 1; - while (--i); - - return 0; -} - -/* Check for overwrite in the image buffer. */ -static void -checkbuffer(Image *image, const char *arg) -{ - if (check16(image->buffer, 95)) - { - fflush(stdout); - fprintf(stderr, "%s: overwrite at start of image buffer\n", arg); - exit(1); - } - - if (check16(image->buffer+16+image->allocsize, 95)) - { - fflush(stdout); - fprintf(stderr, "%s: overwrite at end of image buffer\n", arg); - exit(1); - } -} - -/* ERROR HANDLING */ -/* Log a terminal error, also frees the libpng part of the image if necessary. - */ -static int -logerror(Image *image, const char *a1, const char *a2, const char *a3) -{ - fflush(stdout); - if (image->image.warning_or_error) - fprintf(stderr, "%s%s%s: %s\n", a1, a2, a3, image->image.message); - - else - fprintf(stderr, "%s%s%s\n", a1, a2, a3); - - if (image->image.opaque != NULL) - { - fprintf(stderr, "%s: image opaque pointer non-NULL on error\n", - image->file_name); - png_image_free(&image->image); - } - - return 0; -} - -/* Log an error and close a file (just a utility to do both things in one - * function call.) - */ -static int -logclose(Image *image, FILE *f, const char *name, const char *operation) -{ - int e = errno; - - fclose(f); - return logerror(image, name, operation, strerror(e)); -} - -/* Make sure the png_image has been freed - validates that libpng is doing what - * the spec says and freeing the image. - */ -static int -checkopaque(Image *image) -{ - if (image->image.opaque != NULL) - { - png_image_free(&image->image); - return logerror(image, image->file_name, ": opaque not NULL", ""); - } - - /* Separate out the gamma+background_rgb_to_gray warning because it may - * produce opaque component errors: - */ - else if (image->image.warning_or_error != 0 && - (strcmp(image->image.message, - "libpng does not support gamma+background+rgb_to_gray") == 0 ? - (image->opts & GBG_ERROR) != 0 : (image->opts & STRICT) != 0)) - return logerror(image, image->file_name, (image->opts & GBG_ERROR) != 0 ? - " --fault-gbg-warning" : " --strict", ""); - - else - return 1; -} - -/* IMAGE COMPARISON/CHECKING */ -/* Compare the pixels of two images, which should be the same but aren't. The - * images must have been checked for a size match. - */ -typedef struct -{ - /* The components, for grayscale images the gray value is in 'g' and if alpha - * is not present 'a' is set to 255 or 65535 according to format. - */ - int r, g, b, a; -} Pixel; - -typedef struct -{ - /* The background as the original sRGB 8-bit value converted to the final - * integer format and as a double precision linear value in the range 0..1 - * for with partially transparent pixels. - */ - int ir, ig, ib; - double dr, dg, db; /* linear r,g,b scaled to 0..1 */ -} Background; - -/* Basic image formats; control the data but not the layout thereof. */ -#define BASE_FORMATS\ - (PNG_FORMAT_FLAG_ALPHA|PNG_FORMAT_FLAG_COLOR|PNG_FORMAT_FLAG_LINEAR) - -/* Read a Pixel from a buffer. The code below stores the correct routine for - * the format in a function pointer, these are the routines: - */ -static void -gp_g8(Pixel *p, png_const_voidp pb) -{ - png_const_bytep pp = voidcast(png_const_bytep, pb); - - p->r = p->g = p->b = pp[0]; - p->a = 255; -} - -static void -gp_ga8(Pixel *p, png_const_voidp pb) -{ - png_const_bytep pp = voidcast(png_const_bytep, pb); - - p->r = p->g = p->b = pp[0]; - p->a = pp[1]; -} - -#ifdef PNG_FORMAT_AFIRST_SUPPORTED -static void -gp_ag8(Pixel *p, png_const_voidp pb) -{ - png_const_bytep pp = voidcast(png_const_bytep, pb); - - p->r = p->g = p->b = pp[1]; - p->a = pp[0]; -} -#endif - -static void -gp_rgb8(Pixel *p, png_const_voidp pb) -{ - png_const_bytep pp = voidcast(png_const_bytep, pb); - - p->r = pp[0]; - p->g = pp[1]; - p->b = pp[2]; - p->a = 255; -} - -#ifdef PNG_FORMAT_BGR_SUPPORTED -static void -gp_bgr8(Pixel *p, png_const_voidp pb) -{ - png_const_bytep pp = voidcast(png_const_bytep, pb); - - p->r = pp[2]; - p->g = pp[1]; - p->b = pp[0]; - p->a = 255; -} -#endif - -static void -gp_rgba8(Pixel *p, png_const_voidp pb) -{ - png_const_bytep pp = voidcast(png_const_bytep, pb); - - p->r = pp[0]; - p->g = pp[1]; - p->b = pp[2]; - p->a = pp[3]; -} - -#ifdef PNG_FORMAT_BGR_SUPPORTED -static void -gp_bgra8(Pixel *p, png_const_voidp pb) -{ - png_const_bytep pp = voidcast(png_const_bytep, pb); - - p->r = pp[2]; - p->g = pp[1]; - p->b = pp[0]; - p->a = pp[3]; -} -#endif - -#ifdef PNG_FORMAT_AFIRST_SUPPORTED -static void -gp_argb8(Pixel *p, png_const_voidp pb) -{ - png_const_bytep pp = voidcast(png_const_bytep, pb); - - p->r = pp[1]; - p->g = pp[2]; - p->b = pp[3]; - p->a = pp[0]; -} -#endif - -#if defined(PNG_FORMAT_AFIRST_SUPPORTED) && defined(PNG_FORMAT_BGR_SUPPORTED) -static void -gp_abgr8(Pixel *p, png_const_voidp pb) -{ - png_const_bytep pp = voidcast(png_const_bytep, pb); - - p->r = pp[3]; - p->g = pp[2]; - p->b = pp[1]; - p->a = pp[0]; -} -#endif - -static void -gp_g16(Pixel *p, png_const_voidp pb) -{ - png_const_uint_16p pp = voidcast(png_const_uint_16p, pb); - - p->r = p->g = p->b = pp[0]; - p->a = 65535; -} - -static void -gp_ga16(Pixel *p, png_const_voidp pb) -{ - png_const_uint_16p pp = voidcast(png_const_uint_16p, pb); - - p->r = p->g = p->b = pp[0]; - p->a = pp[1]; -} - -#ifdef PNG_FORMAT_AFIRST_SUPPORTED -static void -gp_ag16(Pixel *p, png_const_voidp pb) -{ - png_const_uint_16p pp = voidcast(png_const_uint_16p, pb); - - p->r = p->g = p->b = pp[1]; - p->a = pp[0]; -} -#endif - -static void -gp_rgb16(Pixel *p, png_const_voidp pb) -{ - png_const_uint_16p pp = voidcast(png_const_uint_16p, pb); - - p->r = pp[0]; - p->g = pp[1]; - p->b = pp[2]; - p->a = 65535; -} - -#ifdef PNG_FORMAT_BGR_SUPPORTED -static void -gp_bgr16(Pixel *p, png_const_voidp pb) -{ - png_const_uint_16p pp = voidcast(png_const_uint_16p, pb); - - p->r = pp[2]; - p->g = pp[1]; - p->b = pp[0]; - p->a = 65535; -} -#endif - -static void -gp_rgba16(Pixel *p, png_const_voidp pb) -{ - png_const_uint_16p pp = voidcast(png_const_uint_16p, pb); - - p->r = pp[0]; - p->g = pp[1]; - p->b = pp[2]; - p->a = pp[3]; -} - -#ifdef PNG_FORMAT_BGR_SUPPORTED -static void -gp_bgra16(Pixel *p, png_const_voidp pb) -{ - png_const_uint_16p pp = voidcast(png_const_uint_16p, pb); - - p->r = pp[2]; - p->g = pp[1]; - p->b = pp[0]; - p->a = pp[3]; -} -#endif - -#ifdef PNG_FORMAT_AFIRST_SUPPORTED -static void -gp_argb16(Pixel *p, png_const_voidp pb) -{ - png_const_uint_16p pp = voidcast(png_const_uint_16p, pb); - - p->r = pp[1]; - p->g = pp[2]; - p->b = pp[3]; - p->a = pp[0]; -} -#endif - -#if defined(PNG_FORMAT_AFIRST_SUPPORTED) && defined(PNG_FORMAT_BGR_SUPPORTED) -static void -gp_abgr16(Pixel *p, png_const_voidp pb) -{ - png_const_uint_16p pp = voidcast(png_const_uint_16p, pb); - - p->r = pp[3]; - p->g = pp[2]; - p->b = pp[1]; - p->a = pp[0]; -} -#endif - -/* Given a format, return the correct one of the above functions. */ -static void (* -get_pixel(png_uint_32 format))(Pixel *p, png_const_voidp pb) -{ - /* The color-map flag is irrelevant here - the caller of the function - * returned must either pass the buffer or, for a color-mapped image, the - * correct entry in the color-map. - */ - if (format & PNG_FORMAT_FLAG_LINEAR) - { - if (format & PNG_FORMAT_FLAG_COLOR) - { -# ifdef PNG_FORMAT_BGR_SUPPORTED - if (format & PNG_FORMAT_FLAG_BGR) - { - if (format & PNG_FORMAT_FLAG_ALPHA) - { -# ifdef PNG_FORMAT_AFIRST_SUPPORTED - if (format & PNG_FORMAT_FLAG_AFIRST) - return gp_abgr16; - - else -# endif - return gp_bgra16; - } - - else - return gp_bgr16; - } - - else -# endif - { - if (format & PNG_FORMAT_FLAG_ALPHA) - { -# ifdef PNG_FORMAT_AFIRST_SUPPORTED - if (format & PNG_FORMAT_FLAG_AFIRST) - return gp_argb16; - - else -# endif - return gp_rgba16; - } - - else - return gp_rgb16; - } - } - - else - { - if (format & PNG_FORMAT_FLAG_ALPHA) - { -# ifdef PNG_FORMAT_AFIRST_SUPPORTED - if (format & PNG_FORMAT_FLAG_AFIRST) - return gp_ag16; - - else -# endif - return gp_ga16; - } - - else - return gp_g16; - } - } - - else - { - if (format & PNG_FORMAT_FLAG_COLOR) - { -# ifdef PNG_FORMAT_BGR_SUPPORTED - if (format & PNG_FORMAT_FLAG_BGR) - { - if (format & PNG_FORMAT_FLAG_ALPHA) - { -# ifdef PNG_FORMAT_AFIRST_SUPPORTED - if (format & PNG_FORMAT_FLAG_AFIRST) - return gp_abgr8; - - else -# endif - return gp_bgra8; - } - - else - return gp_bgr8; - } - - else -# endif - { - if (format & PNG_FORMAT_FLAG_ALPHA) - { -# ifdef PNG_FORMAT_AFIRST_SUPPORTED - if (format & PNG_FORMAT_FLAG_AFIRST) - return gp_argb8; - - else -# endif - return gp_rgba8; - } - - else - return gp_rgb8; - } - } - - else - { - if (format & PNG_FORMAT_FLAG_ALPHA) - { -# ifdef PNG_FORMAT_AFIRST_SUPPORTED - if (format & PNG_FORMAT_FLAG_AFIRST) - return gp_ag8; - - else -# endif - return gp_ga8; - } - - else - return gp_g8; - } - } -} - -/* Conversion between pixel formats. The code above effectively eliminates the - * component ordering changes leaving three basic changes: - * - * 1) Remove an alpha channel by pre-multiplication or compositing on a - * background color. (Adding an alpha channel is a no-op.) - * - * 2) Remove color by mapping to grayscale. (Grayscale to color is a no-op.) - * - * 3) Convert between 8-bit and 16-bit components. (Both directtions are - * relevant.) - * - * This gives the following base format conversion matrix: - * - * OUT: ----- 8-bit ----- ----- 16-bit ----- - * IN G GA RGB RGBA G GA RGB RGBA - * 8 G . . . . lin lin lin lin - * 8 GA bckg . bckc . pre' pre pre' pre - * 8 RGB g8 g8 . . glin glin lin lin - * 8 RGBA g8b g8 bckc . gpr' gpre pre' pre - * 16 G sRGB sRGB sRGB sRGB . . . . - * 16 GA b16g unpg b16c unpc A . A . - * 16 RGB sG sG sRGB sRGB g16 g16 . . - * 16 RGBA gb16 sGp cb16 sCp g16 g16' A . - * - * 8-bit to 8-bit: - * bckg: composite on gray background - * bckc: composite on color background - * g8: convert sRGB components to sRGB grayscale - * g8b: convert sRGB components to grayscale and composite on gray background - * - * 8-bit to 16-bit: - * lin: make sRGB components linear, alpha := 65535 - * pre: make sRGB components linear and premultiply by alpha (scale alpha) - * pre': as 'pre' but alpha := 65535 - * glin: make sRGB components linear, convert to grayscale, alpha := 65535 - * gpre: make sRGB components grayscale and linear and premultiply by alpha - * gpr': as 'gpre' but alpha := 65535 - * - * 16-bit to 8-bit: - * sRGB: convert linear components to sRGB, alpha := 255 - * unpg: unpremultiply gray component and convert to sRGB (scale alpha) - * unpc: unpremultiply color components and convert to sRGB (scale alpha) - * b16g: composite linear onto gray background and convert the result to sRGB - * b16c: composite linear onto color background and convert the result to sRGB - * sG: convert linear RGB to sRGB grayscale - * sGp: unpremultiply RGB then convert to sRGB grayscale - * sCp: unpremultiply RGB then convert to sRGB - * gb16: composite linear onto background and convert to sRGB grayscale - * (order doesn't matter, the composite and grayscale operations permute) - * cb16: composite linear onto background and convert to sRGB - * - * 16-bit to 16-bit: - * A: set alpha to 65535 - * g16: convert linear RGB to linear grayscale (alpha := 65535) - * g16': as 'g16' but alpha is unchanged - */ -/* Simple copy: */ -static void -gpc_noop(Pixel *out, const Pixel *in, const Background *back) -{ - (void)back; - out->r = in->r; - out->g = in->g; - out->b = in->b; - out->a = in->a; -} - -#if ALLOW_UNUSED_GPC -static void -gpc_nop8(Pixel *out, const Pixel *in, const Background *back) -{ - (void)back; - if (in->a == 0) - out->r = out->g = out->b = 255; - - else - { - out->r = in->r; - out->g = in->g; - out->b = in->b; - } - - out->a = in->a; -} -#endif - -#if ALLOW_UNUSED_GPC -static void -gpc_nop6(Pixel *out, const Pixel *in, const Background *back) -{ - (void)back; - if (in->a == 0) - out->r = out->g = out->b = 65535; - - else - { - out->r = in->r; - out->g = in->g; - out->b = in->b; - } - - out->a = in->a; -} -#endif - -/* 8-bit to 8-bit conversions */ -/* bckg: composite on gray background */ -static void -gpc_bckg(Pixel *out, const Pixel *in, const Background *back) -{ - if (in->a <= 0) - out->r = out->g = out->b = back->ig; - - else if (in->a >= 255) - out->r = out->g = out->b = in->g; - - else - { - double a = in->a / 255.; - - out->r = out->g = out->b = sRGB(sRGB_to_d[in->g] * a + back->dg * (1-a)); - } - - out->a = 255; -} - -/* bckc: composite on color background */ -static void -gpc_bckc(Pixel *out, const Pixel *in, const Background *back) -{ - if (in->a <= 0) - { - out->r = back->ir; - out->g = back->ig; - out->b = back->ib; - } - - else if (in->a >= 255) - { - out->r = in->r; - out->g = in->g; - out->b = in->b; - } - - else - { - double a = in->a / 255.; - - out->r = sRGB(sRGB_to_d[in->r] * a + back->dr * (1-a)); - out->g = sRGB(sRGB_to_d[in->g] * a + back->dg * (1-a)); - out->b = sRGB(sRGB_to_d[in->b] * a + back->db * (1-a)); - } - - out->a = 255; -} - -/* g8: convert sRGB components to sRGB grayscale */ -static void -gpc_g8(Pixel *out, const Pixel *in, const Background *back) -{ - (void)back; - - if (in->r == in->g && in->g == in->b) - out->r = out->g = out->b = in->g; - - else - out->r = out->g = out->b = - sRGB(YfromRGB(sRGB_to_d[in->r], sRGB_to_d[in->g], sRGB_to_d[in->b])); - - out->a = in->a; -} - -/* g8b: convert sRGB components to grayscale and composite on gray background */ -static void -gpc_g8b(Pixel *out, const Pixel *in, const Background *back) -{ - if (in->a <= 0) - out->r = out->g = out->b = back->ig; - - else if (in->a >= 255) - { - if (in->r == in->g && in->g == in->b) - out->r = out->g = out->b = in->g; - - else - out->r = out->g = out->b = sRGB(YfromRGB( - sRGB_to_d[in->r], sRGB_to_d[in->g], sRGB_to_d[in->b])); - } - - else - { - double a = in->a/255.; - - out->r = out->g = out->b = sRGB(a * YfromRGB(sRGB_to_d[in->r], - sRGB_to_d[in->g], sRGB_to_d[in->b]) + back->dg * (1-a)); - } - - out->a = 255; -} - -/* 8-bit to 16-bit conversions */ -/* lin: make sRGB components linear, alpha := 65535 */ -static void -gpc_lin(Pixel *out, const Pixel *in, const Background *back) -{ - (void)back; - - out->r = ilinear(in->r); - - if (in->g == in->r) - { - out->g = out->r; - - if (in->b == in->r) - out->b = out->r; - - else - out->b = ilinear(in->b); - } - - else - { - out->g = ilinear(in->g); - - if (in->b == in->r) - out->b = out->r; - - else if (in->b == in->g) - out->b = out->g; - - else - out->b = ilinear(in->b); - } - - out->a = 65535; -} - -/* pre: make sRGB components linear and premultiply by alpha (scale alpha) */ -static void -gpc_pre(Pixel *out, const Pixel *in, const Background *back) -{ - (void)back; - - out->r = ilineara(in->r, in->a); - - if (in->g == in->r) - { - out->g = out->r; - - if (in->b == in->r) - out->b = out->r; - - else - out->b = ilineara(in->b, in->a); - } - - else - { - out->g = ilineara(in->g, in->a); - - if (in->b == in->r) - out->b = out->r; - - else if (in->b == in->g) - out->b = out->g; - - else - out->b = ilineara(in->b, in->a); - } - - out->a = in->a * 257; -} - -/* pre': as 'pre' but alpha := 65535 */ -static void -gpc_preq(Pixel *out, const Pixel *in, const Background *back) -{ - (void)back; - - out->r = ilineara(in->r, in->a); - - if (in->g == in->r) - { - out->g = out->r; - - if (in->b == in->r) - out->b = out->r; - - else - out->b = ilineara(in->b, in->a); - } - - else - { - out->g = ilineara(in->g, in->a); - - if (in->b == in->r) - out->b = out->r; - - else if (in->b == in->g) - out->b = out->g; - - else - out->b = ilineara(in->b, in->a); - } - - out->a = 65535; -} - -/* glin: make sRGB components linear, convert to grayscale, alpha := 65535 */ -static void -gpc_glin(Pixel *out, const Pixel *in, const Background *back) -{ - (void)back; - - if (in->r == in->g && in->g == in->b) - out->r = out->g = out->b = ilinear(in->g); - - else - out->r = out->g = out->b = u16d(65535 * - YfromRGB(sRGB_to_d[in->r], sRGB_to_d[in->g], sRGB_to_d[in->b])); - - out->a = 65535; -} - -/* gpre: make sRGB components grayscale and linear and premultiply by alpha */ -static void -gpc_gpre(Pixel *out, const Pixel *in, const Background *back) -{ - (void)back; - - if (in->r == in->g && in->g == in->b) - out->r = out->g = out->b = ilineara(in->g, in->a); - - else - out->r = out->g = out->b = u16d(in->a * 257 * - YfromRGB(sRGB_to_d[in->r], sRGB_to_d[in->g], sRGB_to_d[in->b])); - - out->a = 257 * in->a; -} - -/* gpr': as 'gpre' but alpha := 65535 */ -static void -gpc_gprq(Pixel *out, const Pixel *in, const Background *back) -{ - (void)back; - - if (in->r == in->g && in->g == in->b) - out->r = out->g = out->b = ilineara(in->g, in->a); - - else - out->r = out->g = out->b = u16d(in->a * 257 * - YfromRGB(sRGB_to_d[in->r], sRGB_to_d[in->g], sRGB_to_d[in->b])); - - out->a = 65535; -} - -/* 8-bit to 16-bit conversions for gAMA 45455 encoded values */ -/* Lin: make gAMA 45455 components linear, alpha := 65535 */ -static void -gpc_Lin(Pixel *out, const Pixel *in, const Background *back) -{ - (void)back; - - out->r = ilinear_g22(in->r); - - if (in->g == in->r) - { - out->g = out->r; - - if (in->b == in->r) - out->b = out->r; - - else - out->b = ilinear_g22(in->b); - } - - else - { - out->g = ilinear_g22(in->g); - - if (in->b == in->r) - out->b = out->r; - - else if (in->b == in->g) - out->b = out->g; - - else - out->b = ilinear_g22(in->b); - } - - out->a = 65535; -} - -#if ALLOW_UNUSED_GPC -/* Pre: make gAMA 45455 components linear and premultiply by alpha (scale alpha) - */ -static void -gpc_Pre(Pixel *out, const Pixel *in, const Background *back) -{ - (void)back; - - out->r = ilineara_g22(in->r, in->a); - - if (in->g == in->r) - { - out->g = out->r; - - if (in->b == in->r) - out->b = out->r; - - else - out->b = ilineara_g22(in->b, in->a); - } - - else - { - out->g = ilineara_g22(in->g, in->a); - - if (in->b == in->r) - out->b = out->r; - - else if (in->b == in->g) - out->b = out->g; - - else - out->b = ilineara_g22(in->b, in->a); - } - - out->a = in->a * 257; -} -#endif - -#if ALLOW_UNUSED_GPC -/* Pre': as 'Pre' but alpha := 65535 */ -static void -gpc_Preq(Pixel *out, const Pixel *in, const Background *back) -{ - (void)back; - - out->r = ilineara_g22(in->r, in->a); - - if (in->g == in->r) - { - out->g = out->r; - - if (in->b == in->r) - out->b = out->r; - - else - out->b = ilineara_g22(in->b, in->a); - } - - else - { - out->g = ilineara_g22(in->g, in->a); - - if (in->b == in->r) - out->b = out->r; - - else if (in->b == in->g) - out->b = out->g; - - else - out->b = ilineara_g22(in->b, in->a); - } - - out->a = 65535; -} -#endif - -#if ALLOW_UNUSED_GPC -/* Glin: make gAMA 45455 components linear, convert to grayscale, alpha := 65535 - */ -static void -gpc_Glin(Pixel *out, const Pixel *in, const Background *back) -{ - (void)back; - - if (in->r == in->g && in->g == in->b) - out->r = out->g = out->b = ilinear_g22(in->g); - - else - out->r = out->g = out->b = u16d(65535 * - YfromRGB(g22_to_d[in->r], g22_to_d[in->g], g22_to_d[in->b])); - - out->a = 65535; -} -#endif - -#if ALLOW_UNUSED_GPC -/* Gpre: make gAMA 45455 components grayscale and linear and premultiply by - * alpha. - */ -static void -gpc_Gpre(Pixel *out, const Pixel *in, const Background *back) -{ - (void)back; - - if (in->r == in->g && in->g == in->b) - out->r = out->g = out->b = ilineara_g22(in->g, in->a); - - else - out->r = out->g = out->b = u16d(in->a * 257 * - YfromRGB(g22_to_d[in->r], g22_to_d[in->g], g22_to_d[in->b])); - - out->a = 257 * in->a; -} -#endif - -#if ALLOW_UNUSED_GPC -/* Gpr': as 'Gpre' but alpha := 65535 */ -static void -gpc_Gprq(Pixel *out, const Pixel *in, const Background *back) -{ - (void)back; - - if (in->r == in->g && in->g == in->b) - out->r = out->g = out->b = ilineara_g22(in->g, in->a); - - else - out->r = out->g = out->b = u16d(in->a * 257 * - YfromRGB(g22_to_d[in->r], g22_to_d[in->g], g22_to_d[in->b])); - - out->a = 65535; -} -#endif - -/* 16-bit to 8-bit conversions */ -/* sRGB: convert linear components to sRGB, alpha := 255 */ -static void -gpc_sRGB(Pixel *out, const Pixel *in, const Background *back) -{ - (void)back; - - out->r = isRGB(in->r); - - if (in->g == in->r) - { - out->g = out->r; - - if (in->b == in->r) - out->b = out->r; - - else - out->b = isRGB(in->b); - } - - else - { - out->g = isRGB(in->g); - - if (in->b == in->r) - out->b = out->r; - - else if (in->b == in->g) - out->b = out->g; - - else - out->b = isRGB(in->b); - } - - out->a = 255; -} - -/* unpg: unpremultiply gray component and convert to sRGB (scale alpha) */ -static void -gpc_unpg(Pixel *out, const Pixel *in, const Background *back) -{ - (void)back; - - if (in->a <= 128) - { - out->r = out->g = out->b = 255; - out->a = 0; - } - - else - { - out->r = out->g = out->b = sRGB((double)in->g / in->a); - out->a = u8d(in->a / 257.); - } -} - -/* unpc: unpremultiply color components and convert to sRGB (scale alpha) */ -static void -gpc_unpc(Pixel *out, const Pixel *in, const Background *back) -{ - (void)back; - - if (in->a <= 128) - { - out->r = out->g = out->b = 255; - out->a = 0; - } - - else - { - out->r = sRGB((double)in->r / in->a); - out->g = sRGB((double)in->g / in->a); - out->b = sRGB((double)in->b / in->a); - out->a = u8d(in->a / 257.); - } -} - -/* b16g: composite linear onto gray background and convert the result to sRGB */ -static void -gpc_b16g(Pixel *out, const Pixel *in, const Background *back) -{ - if (in->a <= 0) - out->r = out->g = out->b = back->ig; - - else - { - double a = in->a/65535.; - double a1 = 1-a; - - a /= 65535; - out->r = out->g = out->b = sRGB(in->g * a + back->dg * a1); - } - - out->a = 255; -} - -/* b16c: composite linear onto color background and convert the result to sRGB*/ -static void -gpc_b16c(Pixel *out, const Pixel *in, const Background *back) -{ - if (in->a <= 0) - { - out->r = back->ir; - out->g = back->ig; - out->b = back->ib; - } - - else - { - double a = in->a/65535.; - double a1 = 1-a; - - a /= 65535; - out->r = sRGB(in->r * a + back->dr * a1); - out->g = sRGB(in->g * a + back->dg * a1); - out->b = sRGB(in->b * a + back->db * a1); - } - - out->a = 255; -} - -/* sG: convert linear RGB to sRGB grayscale */ -static void -gpc_sG(Pixel *out, const Pixel *in, const Background *back) -{ - (void)back; - - out->r = out->g = out->b = sRGB(YfromRGBint(in->r, in->g, in->b)/65535); - out->a = 255; -} - -/* sGp: unpremultiply RGB then convert to sRGB grayscale */ -static void -gpc_sGp(Pixel *out, const Pixel *in, const Background *back) -{ - (void)back; - - if (in->a <= 128) - { - out->r = out->g = out->b = 255; - out->a = 0; - } - - else - { - out->r = out->g = out->b = sRGB(YfromRGBint(in->r, in->g, in->b)/in->a); - out->a = u8d(in->a / 257.); - } -} - -/* sCp: unpremultiply RGB then convert to sRGB */ -static void -gpc_sCp(Pixel *out, const Pixel *in, const Background *back) -{ - (void)back; - - if (in->a <= 128) - { - out->r = out->g = out->b = 255; - out->a = 0; - } - - else - { - out->r = sRGB((double)in->r / in->a); - out->g = sRGB((double)in->g / in->a); - out->b = sRGB((double)in->b / in->a); - out->a = u8d(in->a / 257.); - } -} - -/* gb16: composite linear onto background and convert to sRGB grayscale */ -/* (order doesn't matter, the composite and grayscale operations permute) */ -static void -gpc_gb16(Pixel *out, const Pixel *in, const Background *back) -{ - if (in->a <= 0) - out->r = out->g = out->b = back->ig; - - else if (in->a >= 65535) - out->r = out->g = out->b = isRGB(in->g); - - else - { - double a = in->a / 65535.; - double a1 = 1-a; - - a /= 65535; - out->r = out->g = out->b = sRGB(in->g * a + back->dg * a1); - } - - out->a = 255; -} - -/* cb16: composite linear onto background and convert to sRGB */ -static void -gpc_cb16(Pixel *out, const Pixel *in, const Background *back) -{ - if (in->a <= 0) - { - out->r = back->ir; - out->g = back->ig; - out->b = back->ib; - } - - else if (in->a >= 65535) - { - out->r = isRGB(in->r); - out->g = isRGB(in->g); - out->b = isRGB(in->b); - } - - else - { - double a = in->a / 65535.; - double a1 = 1-a; - - a /= 65535; - out->r = sRGB(in->r * a + back->dr * a1); - out->g = sRGB(in->g * a + back->dg * a1); - out->b = sRGB(in->b * a + back->db * a1); - } - - out->a = 255; -} - -/* 16-bit to 16-bit conversions */ -/* A: set alpha to 65535 */ -static void -gpc_A(Pixel *out, const Pixel *in, const Background *back) -{ - (void)back; - out->r = in->r; - out->g = in->g; - out->b = in->b; - out->a = 65535; -} - -/* g16: convert linear RGB to linear grayscale (alpha := 65535) */ -static void -gpc_g16(Pixel *out, const Pixel *in, const Background *back) -{ - (void)back; - out->r = out->g = out->b = u16d(YfromRGBint(in->r, in->g, in->b)); - out->a = 65535; -} - -/* g16': as 'g16' but alpha is unchanged */ -static void -gpc_g16q(Pixel *out, const Pixel *in, const Background *back) -{ - (void)back; - out->r = out->g = out->b = u16d(YfromRGBint(in->r, in->g, in->b)); - out->a = in->a; -} - -#if ALLOW_UNUSED_GPC -/* Unused functions (to hide them from GCC unused function warnings) */ -void (* const gpc_unused[]) - (Pixel *out, const Pixel *in, const Background *back) = -{ - gpc_Pre, gpc_Preq, gpc_Glin, gpc_Gpre, gpc_Gprq, gpc_nop8, gpc_nop6 -}; -#endif - -/* OUT: ----- 8-bit ----- ----- 16-bit ----- - * IN G GA RGB RGBA G GA RGB RGBA - * 8 G . . . . lin lin lin lin - * 8 GA bckg . bckc . pre' pre pre' pre - * 8 RGB g8 g8 . . glin glin lin lin - * 8 RGBA g8b g8 bckc . gpr' gpre pre' pre - * 16 G sRGB sRGB sRGB sRGB . . . . - * 16 GA b16g unpg b16c unpc A . A . - * 16 RGB sG sG sRGB sRGB g16 g16 . . - * 16 RGBA gb16 sGp cb16 sCp g16 g16' A . - * - * The matrix is held in an array indexed thus: - * - * gpc_fn[out_format & BASE_FORMATS][in_format & BASE_FORMATS]; - */ -/* This will produce a compile time error if the FORMAT_FLAG values don't - * match the above matrix! - */ -#if PNG_FORMAT_FLAG_ALPHA == 1 && PNG_FORMAT_FLAG_COLOR == 2 &&\ - PNG_FORMAT_FLAG_LINEAR == 4 -static void (* const gpc_fn[8/*in*/][8/*out*/]) - (Pixel *out, const Pixel *in, const Background *back) = -{ -/*out: G-8 GA-8 RGB-8 RGBA-8 G-16 GA-16 RGB-16 RGBA-16 */ - {gpc_noop,gpc_noop,gpc_noop,gpc_noop, gpc_Lin, gpc_Lin, gpc_Lin, gpc_Lin }, - {gpc_bckg,gpc_noop,gpc_bckc,gpc_noop, gpc_preq,gpc_pre, gpc_preq,gpc_pre }, - {gpc_g8, gpc_g8, gpc_noop,gpc_noop, gpc_glin,gpc_glin,gpc_lin, gpc_lin }, - {gpc_g8b, gpc_g8, gpc_bckc,gpc_noop, gpc_gprq,gpc_gpre,gpc_preq,gpc_pre }, - {gpc_sRGB,gpc_sRGB,gpc_sRGB,gpc_sRGB, gpc_noop,gpc_noop,gpc_noop,gpc_noop}, - {gpc_b16g,gpc_unpg,gpc_b16c,gpc_unpc, gpc_A, gpc_noop,gpc_A, gpc_noop}, - {gpc_sG, gpc_sG, gpc_sRGB,gpc_sRGB, gpc_g16, gpc_g16, gpc_noop,gpc_noop}, - {gpc_gb16,gpc_sGp, gpc_cb16,gpc_sCp, gpc_g16, gpc_g16q,gpc_A, gpc_noop} -}; - -/* The array is repeated for the cases where both the input and output are color - * mapped because then different algorithms are used. - */ -static void (* const gpc_fn_colormapped[8/*in*/][8/*out*/]) - (Pixel *out, const Pixel *in, const Background *back) = -{ -/*out: G-8 GA-8 RGB-8 RGBA-8 G-16 GA-16 RGB-16 RGBA-16 */ - {gpc_noop,gpc_noop,gpc_noop,gpc_noop, gpc_lin, gpc_lin, gpc_lin, gpc_lin }, - {gpc_bckg,gpc_noop,gpc_bckc,gpc_noop, gpc_preq,gpc_pre, gpc_preq,gpc_pre }, - {gpc_g8, gpc_g8, gpc_noop,gpc_noop, gpc_glin,gpc_glin,gpc_lin, gpc_lin }, - {gpc_g8b, gpc_g8, gpc_bckc,gpc_noop, gpc_gprq,gpc_gpre,gpc_preq,gpc_pre }, - {gpc_sRGB,gpc_sRGB,gpc_sRGB,gpc_sRGB, gpc_noop,gpc_noop,gpc_noop,gpc_noop}, - {gpc_b16g,gpc_unpg,gpc_b16c,gpc_unpc, gpc_A, gpc_noop,gpc_A, gpc_noop}, - {gpc_sG, gpc_sG, gpc_sRGB,gpc_sRGB, gpc_g16, gpc_g16, gpc_noop,gpc_noop}, - {gpc_gb16,gpc_sGp, gpc_cb16,gpc_sCp, gpc_g16, gpc_g16q,gpc_A, gpc_noop} -}; - -/* The error arrays record the error in the same matrix; 64 entries, however - * the different algorithms used in libpng for colormap and direct conversions - * mean that four separate matrices are used (for each combination of - * colormapped and direct.) - * - * In some cases the conversion between sRGB formats goes via a linear - * intermediate; an sRGB to linear conversion (as above) is followed by a simple - * linear to sRGB step with no other conversions. This is done by a separate - * error array from an arbitrary 'in' format to one of the four basic outputs - * (since final output is always sRGB not colormapped). - * - * These arrays may be modified if the --accumulate flag is set during the run; - * then instead of logging errors they are simply added in. - * - * The three entries are currently for transparent, partially transparent and - * opaque input pixel values. Notice that alpha should be exact in each case. - * - * Errors in alpha should only occur when converting from a direct format - * to a colormapped format, when alpha is effectively smashed (so large - * errors can occur.) There should be no error in the '0' and 'opaque' - * values. The fourth entry in the array is used for the alpha error (and it - * should always be zero for the 'via linear' case since this is never color - * mapped.) - * - * Mapping to a colormap smashes the colors, it is necessary to have separate - * values for these cases because they are much larger; it is very much - * impossible to obtain a reasonable result, these are held in - * gpc_error_to_colormap. - */ -#if PNG_FORMAT_FLAG_COLORMAP == 8 /* extra check also required */ -# include "pngstest-errors.h" /* machine generated */ -#endif /* COLORMAP flag check */ -#endif /* flag checks */ - -typedef struct -{ - /* Basic pixel information: */ - Image* in_image; /* Input image */ - const Image* out_image; /* Output image */ - - /* 'background' is the value passed to the gpc_ routines, it may be NULL if - * it should not be used (*this* program has an error if it crashes as a - * result!) - */ - Background background_color; - const Background* background; - - /* Precalculated values: */ - int in_opaque; /* Value of input alpha that is opaque */ - int is_palette; /* Sample values come from the palette */ - int accumulate; /* Accumulate component errors (don't log) */ - int output_8bit; /* Output is 8-bit (else 16-bit) */ - - void (*in_gp)(Pixel*, png_const_voidp); - void (*out_gp)(Pixel*, png_const_voidp); - - void (*transform)(Pixel *out, const Pixel *in, const Background *back); - /* A function to perform the required transform */ - - void (*from_linear)(Pixel *out, const Pixel *in, const Background *back); - /* For 'via_linear' transforms the final, from linear, step, else NULL */ - - png_uint_16 error[4]; - /* Three error values for transparent, partially transparent and opaque - * input pixels (in turn). - */ - - png_uint_16 *error_ptr; - /* Where these are stored in the static array (for 'accumulate') */ -} -Transform; - -/* Return a 'transform' as above for the given format conversion. */ -static void -transform_from_formats(Transform *result, Image *in_image, - const Image *out_image, png_const_colorp background, int via_linear) -{ - png_uint_32 in_format, out_format; - png_uint_32 in_base, out_base; - - memset(result, 0, sizeof *result); - - /* Store the original images for error messages */ - result->in_image = in_image; - result->out_image = out_image; - - in_format = in_image->image.format; - out_format = out_image->image.format; - - if (in_format & PNG_FORMAT_FLAG_LINEAR) - result->in_opaque = 65535; - else - result->in_opaque = 255; - - result->output_8bit = (out_format & PNG_FORMAT_FLAG_LINEAR) == 0; - - result->is_palette = 0; /* set by caller if required */ - result->accumulate = (in_image->opts & ACCUMULATE) != 0; - - /* The loaders (which need the ordering information) */ - result->in_gp = get_pixel(in_format); - result->out_gp = get_pixel(out_format); - - /* Remove the ordering information: */ - in_format &= BASE_FORMATS | PNG_FORMAT_FLAG_COLORMAP; - in_base = in_format & BASE_FORMATS; - out_format &= BASE_FORMATS | PNG_FORMAT_FLAG_COLORMAP; - out_base = out_format & BASE_FORMATS; - - if (via_linear) - { - /* Check for an error in this program: */ - if (out_format & (PNG_FORMAT_FLAG_LINEAR|PNG_FORMAT_FLAG_COLORMAP)) - { - fprintf(stderr, "internal transform via linear error 0x%x->0x%x\n", - in_format, out_format); - exit(1); - } - - result->transform = gpc_fn[in_base][out_base | PNG_FORMAT_FLAG_LINEAR]; - result->from_linear = gpc_fn[out_base | PNG_FORMAT_FLAG_LINEAR][out_base]; - result->error_ptr = gpc_error_via_linear[in_format][out_format]; - } - - else if (~in_format & out_format & PNG_FORMAT_FLAG_COLORMAP) - { - /* The input is not colormapped but the output is, the errors will - * typically be large (only the grayscale-no-alpha case permits preserving - * even 8-bit values.) - */ - result->transform = gpc_fn[in_base][out_base]; - result->from_linear = NULL; - result->error_ptr = gpc_error_to_colormap[in_base][out_base]; - } - - else - { - /* The caller handles the colormap->pixel value conversion, so the - * transform function just gets a pixel value, however because libpng - * currently contains a different implementation for mapping a colormap if - * both input and output are colormapped we need different conversion - * functions to deal with errors in the libpng implementation. - */ - if (in_format & out_format & PNG_FORMAT_FLAG_COLORMAP) - result->transform = gpc_fn_colormapped[in_base][out_base]; - else - result->transform = gpc_fn[in_base][out_base]; - result->from_linear = NULL; - result->error_ptr = gpc_error[in_format][out_format]; - } - - /* Follow the libpng simplified API rules to work out what to pass to the gpc - * routines as a background value, if one is not required pass NULL so that - * this program crashes in the even of a programming error. - */ - result->background = NULL; /* default: not required */ - - /* Rule 1: background only need be supplied if alpha is to be removed */ - if (in_format & ~out_format & PNG_FORMAT_FLAG_ALPHA) - { - /* The input value is 'NULL' to use the background and (otherwise) an sRGB - * background color (to use a solid color). The code above uses a fixed - * byte value, BUFFER_INIT8, for buffer even for 16-bit output. For - * linear (16-bit) output the sRGB background color is ignored; the - * composition is always on the background (so BUFFER_INIT8 * 257), except - * that for the colormap (i.e. linear colormapped output) black is used. - */ - result->background = &result->background_color; - - if (out_format & PNG_FORMAT_FLAG_LINEAR || via_linear) - { - if (out_format & PNG_FORMAT_FLAG_COLORMAP) - { - result->background_color.ir = - result->background_color.ig = - result->background_color.ib = 0; - result->background_color.dr = - result->background_color.dg = - result->background_color.db = 0; - } - - else - { - result->background_color.ir = - result->background_color.ig = - result->background_color.ib = BUFFER_INIT8 * 257; - result->background_color.dr = - result->background_color.dg = - result->background_color.db = 0; - } - } - - else /* sRGB output */ - { - if (background != NULL) - { - if (out_format & PNG_FORMAT_FLAG_COLOR) - { - result->background_color.ir = background->red; - result->background_color.ig = background->green; - result->background_color.ib = background->blue; - /* TODO: sometimes libpng uses the power law conversion here, how - * to handle this? - */ - result->background_color.dr = sRGB_to_d[background->red]; - result->background_color.dg = sRGB_to_d[background->green]; - result->background_color.db = sRGB_to_d[background->blue]; - } - - else /* grayscale: libpng only looks at 'g' */ - { - result->background_color.ir = - result->background_color.ig = - result->background_color.ib = background->green; - /* TODO: sometimes libpng uses the power law conversion here, how - * to handle this? - */ - result->background_color.dr = - result->background_color.dg = - result->background_color.db = sRGB_to_d[background->green]; - } - } - - else if ((out_format & PNG_FORMAT_FLAG_COLORMAP) == 0) - { - result->background_color.ir = - result->background_color.ig = - result->background_color.ib = BUFFER_INIT8; - /* TODO: sometimes libpng uses the power law conversion here, how - * to handle this? - */ - result->background_color.dr = - result->background_color.dg = - result->background_color.db = sRGB_to_d[BUFFER_INIT8]; - } - - /* Else the output is colormapped and a background color must be - * provided; if pngstest crashes then that is a bug in this program - * (though libpng should png_error as well.) - */ - else - result->background = NULL; - } - } - - if (result->background == NULL) - { - result->background_color.ir = - result->background_color.ig = - result->background_color.ib = -1; /* not used */ - result->background_color.dr = - result->background_color.dg = - result->background_color.db = 1E30; /* not used */ - } - - - /* Copy the error values into the Transform: */ - result->error[0] = result->error_ptr[0]; - result->error[1] = result->error_ptr[1]; - result->error[2] = result->error_ptr[2]; - result->error[3] = result->error_ptr[3]; -} - - -/* Compare two pixels. - * - * OLD error values: -static int error_to_linear = 811; * by experiment * -static int error_to_linear_grayscale = 424; * by experiment * -static int error_to_sRGB = 6; * by experiment * -static int error_to_sRGB_grayscale = 17; * libpng error by calculation + - 2 by experiment * -static int error_in_compose = 2; * by experiment * -static int error_in_premultiply = 1; - * - * The following is *just* the result of a round trip from 8-bit sRGB to linear - * then back to 8-bit sRGB when it is done by libpng. There are two problems: - * - * 1) libpng currently uses a 2.2 power law with no linear segment, this results - * in instability in the low values and even with 16-bit precision sRGB(1) ends - * up mapping to sRGB(0) as a result of rounding in the 16-bit representation. - * This gives an error of 1 in the handling of value 1 only. - * - * 2) libpng currently uses an intermediate 8-bit linear value in gamma - * correction of 8-bit values. This results in many more errors, the worse of - * which is mapping sRGB(14) to sRGB(0). - * - * The general 'error_via_linear' is more complex because of pre-multiplication, - * this compounds the 8-bit errors according to the alpha value of the pixel. - * As a result 256 values are pre-calculated for error_via_linear. - */ -#if 0 -static int error_in_libpng_gamma; -static int error_via_linear[256]; /* Indexed by 8-bit alpha */ - -static void -init_error_via_linear(void) -{ - int alpha; - - error_via_linear[0] = 255; /* transparent pixel */ - - for (alpha=1; alpha<=255; ++alpha) - { - /* 16-bit values less than 128.5 get rounded to 8-bit 0 and so the worst - * case error arises with 16-bit 128.5, work out what sRGB - * (non-associated) value generates 128.5; any value less than this is - * going to map to 0, so the worst error is floor(value). - * - * Note that errors are considerably higher (more than a factor of 2) - * because libpng uses a simple power law for sRGB data at present. - * - * Add .1 for arithmetic errors inside libpng. - */ - double v = floor(255*pow(.5/*(128.5 * 255 / 65535)*/ / alpha, 1/2.2)+.1); - - error_via_linear[alpha] = (int)v; - } - - /* This is actually 14.99, but, despite the closeness to 15, 14 seems to work - * ok in this case. - */ - error_in_libpng_gamma = 14; -} -#endif - -static void -print_pixel(char string[64], const Pixel *pixel, png_uint_32 format) -{ - switch (format & (PNG_FORMAT_FLAG_ALPHA|PNG_FORMAT_FLAG_COLOR)) - { - case 0: - sprintf(string, "%s(%d)", format_names[format], pixel->g); - break; - - case PNG_FORMAT_FLAG_ALPHA: - sprintf(string, "%s(%d,%d)", format_names[format], pixel->g, - pixel->a); - break; - - case PNG_FORMAT_FLAG_COLOR: - sprintf(string, "%s(%d,%d,%d)", format_names[format], - pixel->r, pixel->g, pixel->b); - break; - - case PNG_FORMAT_FLAG_COLOR|PNG_FORMAT_FLAG_ALPHA: - sprintf(string, "%s(%d,%d,%d,%d)", format_names[format], - pixel->r, pixel->g, pixel->b, pixel->a); - break; - - default: - sprintf(string, "invalid-format"); - break; - } -} - -static int -logpixel(const Transform *transform, png_uint_32 x, png_uint_32 y, - const Pixel *in, const Pixel *calc, const Pixel *out, const char *reason) -{ - png_uint_32 in_format = transform->in_image->image.format; - png_uint_32 out_format = transform->out_image->image.format; - - png_uint_32 back_format = out_format & ~PNG_FORMAT_FLAG_ALPHA; - const char *via_linear = ""; - - char pixel_in[64], pixel_calc[64], pixel_out[64], pixel_loc[64]; - char background_info[100]; - - print_pixel(pixel_in, in, in_format); - print_pixel(pixel_calc, calc, out_format); - print_pixel(pixel_out, out, out_format); - - if (transform->is_palette) - sprintf(pixel_loc, "palette: %lu", (unsigned long)y); - else - sprintf(pixel_loc, "%lu,%lu", (unsigned long)x, (unsigned long)y); - - if (transform->from_linear != NULL) - { - via_linear = " (via linear)"; - /* And as a result the *read* format which did any background processing - * was itself linear, so the background color information is also - * linear. - */ - back_format |= PNG_FORMAT_FLAG_LINEAR; - } - - if (transform->background != NULL) - { - Pixel back; - char pixel_back[64]; - - back.r = transform->background->ir; - back.g = transform->background->ig; - back.b = transform->background->ib; - back.a = -1; /* not used */ - - print_pixel(pixel_back, &back, back_format); - sprintf(background_info, " on background %s", pixel_back); - } - - else - background_info[0] = 0; - - if (transform->in_image->file_name != transform->out_image->file_name) - { - char error_buffer[512]; - sprintf(error_buffer, - "(%s) %s error%s:\n %s%s ->\n %s\n not: %s.\n" - "Use --preserve and examine: ", pixel_loc, reason, via_linear, - pixel_in, background_info, pixel_out, pixel_calc); - return logerror(transform->in_image, transform->in_image->file_name, - error_buffer, transform->out_image->file_name); - } - - else - { - char error_buffer[512]; - sprintf(error_buffer, - "(%s) %s error%s:\n %s%s ->\n %s\n not: %s.\n" - " The error happened when reading the original file with this format.", - pixel_loc, reason, via_linear, pixel_in, background_info, pixel_out, - pixel_calc); - return logerror(transform->in_image, transform->in_image->file_name, - error_buffer, ""); - } -} - -static int -cmppixel(Transform *transform, png_const_voidp in, png_const_voidp out, - png_uint_32 x, png_uint_32 y/*or palette index*/) -{ - int maxerr; - png_const_charp errmsg; - Pixel pixel_in, pixel_calc, pixel_out; - - transform->in_gp(&pixel_in, in); - - if (transform->from_linear == NULL) - transform->transform(&pixel_calc, &pixel_in, transform->background); - - else - { - transform->transform(&pixel_out, &pixel_in, transform->background); - transform->from_linear(&pixel_calc, &pixel_out, NULL); - } - - transform->out_gp(&pixel_out, out); - - /* Eliminate the case where the input and output values match exactly. */ - if (pixel_calc.a == pixel_out.a && pixel_calc.r == pixel_out.r && - pixel_calc.g == pixel_out.g && pixel_calc.b == pixel_out.b) - return 1; - - /* Eliminate the case where the output pixel is transparent and the output - * is 8-bit - any component values are valid. Don't check the input alpha - * here to also skip the 16-bit small alpha cases. - */ - if (transform->output_8bit && pixel_calc.a == 0 && pixel_out.a == 0) - return 1; - - /* Check for alpha errors first; an alpha error can damage the components too - * so avoid spurious checks on components if one is found. - */ - errmsg = NULL; - { - int err_a = abs(pixel_calc.a-pixel_out.a); - - if (err_a > transform->error[3]) - { - /* If accumulating check the components too */ - if (transform->accumulate) - transform->error[3] = (png_uint_16)err_a; - - else - errmsg = "alpha"; - } - } - - /* Now if *either* of the output alphas are 0 but alpha is within tolerance - * eliminate the 8-bit component comparison. - */ - if (errmsg == NULL && transform->output_8bit && - (pixel_calc.a == 0 || pixel_out.a == 0)) - return 1; - - if (errmsg == NULL) /* else just signal an alpha error */ - { - int err_r = abs(pixel_calc.r - pixel_out.r); - int err_g = abs(pixel_calc.g - pixel_out.g); - int err_b = abs(pixel_calc.b - pixel_out.b); - int limit; - - if ((err_r | err_g | err_b) == 0) - return 1; /* exact match */ - - /* Mismatch on a component, check the input alpha */ - if (pixel_in.a >= transform->in_opaque) - { - errmsg = "opaque component"; - limit = 2; /* opaque */ - } - - else if (pixel_in.a > 0) - { - errmsg = "alpha component"; - limit = 1; /* partially transparent */ - } - - else - { - errmsg = "transparent component (background)"; - limit = 0; /* transparent */ - } - - maxerr = err_r; - if (maxerr < err_g) maxerr = err_g; - if (maxerr < err_b) maxerr = err_b; - - if (maxerr <= transform->error[limit]) - return 1; /* within the error limits */ - - /* Handle a component mis-match; log it, just return an error code, or - * accumulate it. - */ - if (transform->accumulate) - { - transform->error[limit] = (png_uint_16)maxerr; - return 1; /* to cause the caller to keep going */ - } - } - - /* Failure to match and not accumulating, so the error must be logged. */ - return logpixel(transform, x, y, &pixel_in, &pixel_calc, &pixel_out, errmsg); -} - -static png_byte -component_loc(png_byte loc[4], png_uint_32 format) -{ - /* Given a format return the number of channels and the location of - * each channel. - * - * The mask 'loc' contains the component offset of the channels in the - * following order. Note that if 'format' is grayscale the entries 1-3 must - * all contain the location of the gray channel. - * - * 0: alpha - * 1: red or gray - * 2: green or gray - * 3: blue or gray - */ - png_byte channels; - - if (format & PNG_FORMAT_FLAG_COLOR) - { - channels = 3; - - loc[2] = 1; - -# ifdef PNG_FORMAT_BGR_SUPPORTED - if (format & PNG_FORMAT_FLAG_BGR) - { - loc[1] = 2; - loc[3] = 0; - } - - else -# endif - { - loc[1] = 0; - loc[3] = 2; - } - } - - else - { - channels = 1; - loc[1] = loc[2] = loc[3] = 0; - } - - if (format & PNG_FORMAT_FLAG_ALPHA) - { -# ifdef PNG_FORMAT_AFIRST_SUPPORTED - if (format & PNG_FORMAT_FLAG_AFIRST) - { - loc[0] = 0; - ++loc[1]; - ++loc[2]; - ++loc[3]; - } - - else -# endif - loc[0] = channels; - - ++channels; - } - - else - loc[0] = 4; /* not present */ - - return channels; -} - -/* Compare two images, the original 'a', which was written out then read back in - * to * give image 'b'. The formats may have been changed. - */ -static int -compare_two_images(Image *a, Image *b, int via_linear, - png_const_colorp background) -{ - ptrdiff_t stridea = a->stride; - ptrdiff_t strideb = b->stride; - png_const_bytep rowa = a->buffer+16; - png_const_bytep rowb = b->buffer+16; - png_uint_32 width = a->image.width; - png_uint_32 height = a->image.height; - png_uint_32 formata = a->image.format; - png_uint_32 formatb = b->image.format; - unsigned int a_sample = PNG_IMAGE_SAMPLE_SIZE(formata); - unsigned int b_sample = PNG_IMAGE_SAMPLE_SIZE(formatb); - int alpha_added, alpha_removed; - int bchannels; - png_uint_32 y; - Transform tr; - int btoa[4]={0,0,0,0}; - - /* This should never happen: */ - if (width != b->image.width || height != b->image.height) - return logerror(a, a->file_name, ": width x height changed: ", - b->file_name); - - /* Set up the background and the transform */ - transform_from_formats(&tr, a, b, background, via_linear); - - /* Find the first row and inter-row space. */ - if (!(formata & PNG_FORMAT_FLAG_COLORMAP) && - (formata & PNG_FORMAT_FLAG_LINEAR)) - stridea *= 2; - - if (!(formatb & PNG_FORMAT_FLAG_COLORMAP) && - (formatb & PNG_FORMAT_FLAG_LINEAR)) - strideb *= 2; - - if (stridea < 0) rowa += (height-1) * (-stridea); - if (strideb < 0) rowb += (height-1) * (-strideb); - - /* First shortcut the two colormap case by comparing the image data; if it - * matches then we expect the colormaps to match, although this is not - * absolutely necessary for an image match. If the colormaps fail to match - * then there is a problem in libpng. - */ - if (formata & formatb & PNG_FORMAT_FLAG_COLORMAP) - { - /* Only check colormap entries that actually exist; */ - png_const_bytep ppa, ppb; - int match; - png_byte in_use[256], amax = 0, bmax = 0; - - memset(in_use, 0, sizeof in_use); - - ppa = rowa; - ppb = rowb; - - /* Do this the slow way to accumulate the 'in_use' flags, don't break out - * of the loop until the end; this validates the color-mapped data to - * ensure all pixels are valid color-map indexes. - */ - for (y=0, match=1; y bmax) - bmax = bval; - - if (bval != aval) - match = 0; - - in_use[aval] = 1; - if (aval > amax) - amax = aval; - } - } - - /* If the buffers match then the colormaps must too. */ - if (match) - { - /* Do the color-maps match, entry by entry? Only check the 'in_use' - * entries. An error here should be logged as a color-map error. - */ - png_const_bytep a_cmap = (png_const_bytep)a->colormap; - png_const_bytep b_cmap = (png_const_bytep)b->colormap; - int result = 1; /* match by default */ - - /* This is used in logpixel to get the error message correct. */ - tr.is_palette = 1; - - for (y=0; y<256; ++y, a_cmap += a_sample, b_cmap += b_sample) - if (in_use[y]) - { - /* The colormap entries should be valid, but because libpng doesn't - * do any checking at present the original image may contain invalid - * pixel values. These cause an error here (at present) unless - * accumulating errors in which case the program just ignores them. - */ - if (y >= a->image.colormap_entries) - { - if ((a->opts & ACCUMULATE) == 0) - { - char pindex[9]; - sprintf(pindex, "%lu[%lu]", (unsigned long)y, - (unsigned long)a->image.colormap_entries); - logerror(a, a->file_name, ": bad pixel index: ", pindex); - } - result = 0; - } - - else if (y >= b->image.colormap_entries) - { - if ((b->opts & ACCUMULATE) == 0) - { - char pindex[9]; - sprintf(pindex, "%lu[%lu]", (unsigned long)y, - (unsigned long)b->image.colormap_entries); - logerror(b, b->file_name, ": bad pixel index: ", pindex); - } - result = 0; - } - - /* All the mismatches are logged here; there can only be 256! */ - else if (!cmppixel(&tr, a_cmap, b_cmap, 0, y)) - result = 0; - } - - /* If requested, copy the error values back from the Transform. */ - if (a->opts & ACCUMULATE) - { - tr.error_ptr[0] = tr.error[0]; - tr.error_ptr[1] = tr.error[1]; - tr.error_ptr[2] = tr.error[2]; - tr.error_ptr[3] = tr.error[3]; - result = 1; /* force a continue */ - } - - return result; - } - - /* else the image buffers don't match pixel-wise so compare sample values - * instead, but first validate that the pixel indexes are in range (but - * only if not accumulating, when the error is ignored.) - */ - else if ((a->opts & ACCUMULATE) == 0) - { -# ifdef __GNUC__ -# define BYTE_CHARS 20 /* 2^32: GCC sprintf warning */ -# else -# define BYTE_CHARS 3 /* 2^8: real maximum value */ -# endif - /* Check the original image first, - * TODO: deal with input images with bad pixel values? - */ - if (amax >= a->image.colormap_entries) - { - char pindex[3+2*BYTE_CHARS]; - sprintf(pindex, "%d[%u]", amax, - (png_byte)/*SAFE*/a->image.colormap_entries); - return logerror(a, a->file_name, ": bad pixel index: ", pindex); - } - - else if (bmax >= b->image.colormap_entries) - { - char pindex[3+2*BYTE_CHARS]; - sprintf(pindex, "%d[%u]", bmax, - (png_byte)/*SAFE*/b->image.colormap_entries); - return logerror(b, b->file_name, ": bad pixel index: ", pindex); - } - } - } - - /* We can directly compare pixel values without the need to use the read - * or transform support (i.e. a memory compare) if: - * - * 1) The bit depth has not changed. - * 2) RGB to grayscale has not been done (the reverse is ok; we just compare - * the three RGB values to the original grayscale.) - * 3) An alpha channel has not been removed from an 8-bit format, or the - * 8-bit alpha value of the pixel was 255 (opaque). - * - * If an alpha channel has been *added* then it must have the relevant opaque - * value (255 or 65535). - * - * The fist two the tests (in the order given above) (using the boolean - * equivalence !a && !b == !(a || b)) - */ - if (!(((formata ^ formatb) & PNG_FORMAT_FLAG_LINEAR) | - (formata & (formatb ^ PNG_FORMAT_FLAG_COLOR) & PNG_FORMAT_FLAG_COLOR))) - { - /* Was an alpha channel changed? */ - png_uint_32 alpha_changed = (formata ^ formatb) & PNG_FORMAT_FLAG_ALPHA; - - /* Was an alpha channel removed? (The third test.) If so the direct - * comparison is only possible if the input alpha is opaque. - */ - alpha_removed = (formata & alpha_changed) != 0; - - /* Was an alpha channel added? */ - alpha_added = (formatb & alpha_changed) != 0; - - /* The channels may have been moved between input and output, this finds - * out how, recording the result in the btoa array, which says where in - * 'a' to find each channel of 'b'. If alpha was added then btoa[alpha] - * ends up as 4 (and is not used.) - */ - { - int i; - png_byte aloc[4]; - png_byte bloc[4]; - - /* The following are used only if the formats match, except that - * 'bchannels' is a flag for matching formats. btoa[x] says, for each - * channel in b, where to find the corresponding value in a, for the - * bchannels. achannels may be different for a gray to rgb transform - * (a will be 1 or 2, b will be 3 or 4 channels.) - */ - (void)component_loc(aloc, formata); - bchannels = component_loc(bloc, formatb); - - /* Hence the btoa array. */ - for (i=0; i<4; ++i) if (bloc[i] < 4) - btoa[bloc[i]] = aloc[i]; /* may be '4' for alpha */ - - if (alpha_added) - alpha_added = bloc[0]; /* location of alpha channel in image b */ - - else - alpha_added = 4; /* Won't match an image b channel */ - - if (alpha_removed) - alpha_removed = aloc[0]; /* location of alpha channel in image a */ - - else - alpha_removed = 4; - } - } - - else - { - /* Direct compare is not possible, cancel out all the corresponding local - * variables. - */ - bchannels = 0; - alpha_removed = alpha_added = 4; - btoa[3] = btoa[2] = btoa[1] = btoa[0] = 4; /* 4 == not present */ - } - - for (y=0; ycolormap + a_sample * *ppa++; - else - psa = ppa, ppa += a_sample; - - if (formatb & PNG_FORMAT_FLAG_COLORMAP) - psb = (png_const_bytep)b->colormap + b_sample * *ppb++; - else - psb = ppb, ppb += b_sample; - - /* Do the fast test if possible. */ - if (bchannels) - { - /* Check each 'b' channel against either the corresponding 'a' - * channel or the opaque alpha value, as appropriate. If - * alpha_removed value is set (not 4) then also do this only if the - * 'a' alpha channel (alpha_removed) is opaque; only relevant for - * the 8-bit case. - */ - if (formatb & PNG_FORMAT_FLAG_LINEAR) /* 16-bit checks */ - { - png_const_uint_16p pua = aligncastconst(png_const_uint_16p, psa); - png_const_uint_16p pub = aligncastconst(png_const_uint_16p, psb); - - switch (bchannels) - { - case 4: - if (pua[btoa[3]] != pub[3]) break; - /* FALLTHROUGH */ - case 3: - if (pua[btoa[2]] != pub[2]) break; - /* FALLTHROUGH */ - case 2: - if (pua[btoa[1]] != pub[1]) break; - /* FALLTHROUGH */ - case 1: - if (pua[btoa[0]] != pub[0]) break; - if (alpha_added != 4 && pub[alpha_added] != 65535) break; - continue; /* x loop */ - default: - break; /* impossible */ - } - } - - else if (alpha_removed == 4 || psa[alpha_removed] == 255) - { - switch (bchannels) - { - case 4: - if (psa[btoa[3]] != psb[3]) break; - /* FALLTHROUGH */ - case 3: - if (psa[btoa[2]] != psb[2]) break; - /* FALLTHROUGH */ - case 2: - if (psa[btoa[1]] != psb[1]) break; - /* FALLTHROUGH */ - case 1: - if (psa[btoa[0]] != psb[0]) break; - if (alpha_added != 4 && psb[alpha_added] != 255) break; - continue; /* x loop */ - default: - break; /* impossible */ - } - } - } - - /* If we get to here the fast match failed; do the slow match for this - * pixel. - */ - if (!cmppixel(&tr, psa, psb, x, y) && (a->opts & KEEP_GOING) == 0) - return 0; /* error case */ - } - } - - /* If requested, copy the error values back from the Transform. */ - if (a->opts & ACCUMULATE) - { - tr.error_ptr[0] = tr.error[0]; - tr.error_ptr[1] = tr.error[1]; - tr.error_ptr[2] = tr.error[2]; - tr.error_ptr[3] = tr.error[3]; - } - - return 1; -} - -/* Read the file; how the read gets done depends on which of input_file and - * input_memory have been set. - */ -static int -read_file(Image *image, png_uint_32 format, png_const_colorp background) -{ - memset(&image->image, 0, sizeof image->image); - image->image.version = PNG_IMAGE_VERSION; - - if (image->input_memory != NULL) - { - if (!png_image_begin_read_from_memory(&image->image, image->input_memory, - image->input_memory_size)) - return logerror(image, "memory init: ", image->file_name, ""); - } - -# ifdef PNG_STDIO_SUPPORTED - else if (image->input_file != NULL) - { - if (!png_image_begin_read_from_stdio(&image->image, image->input_file)) - return logerror(image, "stdio init: ", image->file_name, ""); - } - - else - { - if (!png_image_begin_read_from_file(&image->image, image->file_name)) - return logerror(image, "file init: ", image->file_name, ""); - } -# else - else - { - return logerror(image, "unsupported file/stdio init: ", - image->file_name, ""); - } -# endif - - /* This must be set after the begin_read call: */ - if (image->opts & sRGB_16BIT) - image->image.flags |= PNG_IMAGE_FLAG_16BIT_sRGB; - - /* Have an initialized image with all the data we need plus, maybe, an - * allocated file (myfile) or buffer (mybuffer) that need to be freed. - */ - { - int result; - png_uint_32 image_format; - - /* Print both original and output formats. */ - image_format = image->image.format; - - if (image->opts & VERBOSE) - { - printf("%s %lu x %lu %s -> %s", image->file_name, - (unsigned long)image->image.width, - (unsigned long)image->image.height, - format_names[image_format & FORMAT_MASK], - (format & FORMAT_NO_CHANGE) != 0 || image->image.format == format - ? "no change" : format_names[format & FORMAT_MASK]); - - if (background != NULL) - printf(" background(%d,%d,%d)\n", background->red, - background->green, background->blue); - else - printf("\n"); - - fflush(stdout); - } - - /* 'NO_CHANGE' combined with the color-map flag forces the base format - * flags to be set on read to ensure that the original representation is - * not lost in the pass through a colormap format. - */ - if ((format & FORMAT_NO_CHANGE) != 0) - { - if ((format & PNG_FORMAT_FLAG_COLORMAP) != 0 && - (image_format & PNG_FORMAT_FLAG_COLORMAP) != 0) - format = (image_format & ~BASE_FORMATS) | (format & BASE_FORMATS); - - else - format = image_format; - } - - image->image.format = format; - - image->stride = PNG_IMAGE_ROW_STRIDE(image->image) + image->stride_extra; - allocbuffer(image); - - result = png_image_finish_read(&image->image, background, - image->buffer+16, (png_int_32)image->stride, image->colormap); - - checkbuffer(image, image->file_name); - - if (result) - return checkopaque(image); - - else - return logerror(image, image->file_name, ": image read failed", ""); - } -} - -/* Reads from a filename, which must be in image->file_name, but uses - * image->opts to choose the method. The file is always read in its native - * format (the one the simplified API suggests). - */ -static int -read_one_file(Image *image) -{ - if (!(image->opts & USE_FILE) || (image->opts & USE_STDIO)) - { - /* memory or stdio. */ - FILE *f = fopen(image->file_name, "rb"); - - if (f != NULL) - { - if (image->opts & USE_FILE) - image->input_file = f; - - else /* memory */ - { - if (fseek(f, 0, SEEK_END) == 0) - { - long int cb = ftell(f); - - if (cb > 0) - { -#ifndef __COVERITY__ - if ((unsigned long int)cb <= (size_t)~(size_t)0) -#endif - { - png_bytep b = voidcast(png_bytep, malloc((size_t)cb)); - - if (b != NULL) - { - rewind(f); - - if (fread(b, (size_t)cb, 1, f) == 1) - { - fclose(f); - image->input_memory_size = cb; - image->input_memory = b; - } - - else - { - free(b); - return logclose(image, f, image->file_name, - ": read failed: "); - } - } - - else - return logclose(image, f, image->file_name, - ": out of memory: "); - } - - else - return logclose(image, f, image->file_name, - ": file too big for this architecture: "); - /* cb is the length of the file as a (long) and - * this is greater than the maximum amount of - * memory that can be requested from malloc. - */ - } - - else if (cb == 0) - return logclose(image, f, image->file_name, - ": zero length: "); - - else - return logclose(image, f, image->file_name, - ": tell failed: "); - } - - else - return logclose(image, f, image->file_name, ": seek failed: "); - } - } - - else - return logerror(image, image->file_name, ": open failed: ", - strerror(errno)); - } - - return read_file(image, FORMAT_NO_CHANGE, NULL); -} - -#ifdef PNG_SIMPLIFIED_WRITE_SUPPORTED -static int -write_one_file(Image *output, Image *image, int convert_to_8bit) -{ - if (image->opts & FAST_WRITE) - image->image.flags |= PNG_IMAGE_FLAG_FAST; - - if (image->opts & USE_STDIO) - { -#ifdef PNG_SIMPLIFIED_WRITE_STDIO_SUPPORTED -#ifndef __COVERITY__ - FILE *f = tmpfile(); -#else - /* Experimental. Coverity says tmpfile() is insecure because it - * generates predictable names. - * - * It is possible to satisfy Coverity by using mkstemp(); however, - * any platform supporting mkstemp() undoubtedly has a secure tmpfile() - * implementation as well, and doesn't need the fix. Note that - * the fix won't work on platforms that don't support mkstemp(). - * - * https://www.securecoding.cert.org/confluence/display/c/ - * FIO21-C.+Do+not+create+temporary+files+in+shared+directories - * says that most historic implementations of tmpfile() provide - * only a limited number of possible temporary file names - * (usually 26) before file names are recycled. That article also - * provides a secure solution that unfortunately depends upon mkstemp(). - */ - char tmpfile[] = "pngstest-XXXXXX"; - int filedes; - FILE *f; - umask(0177); - filedes = mkstemp(tmpfile); - if (filedes < 0) - f = NULL; - else - { - f = fdopen(filedes,"w+"); - /* Hide the filename immediately and ensure that the file does - * not exist after the program ends - */ - (void) unlink(tmpfile); - } -#endif - - if (f != NULL) - { - if (png_image_write_to_stdio(&image->image, f, convert_to_8bit, - image->buffer+16, (png_int_32)image->stride, image->colormap)) - { - if (fflush(f) == 0) - { - rewind(f); - initimage(output, image->opts, "tmpfile", image->stride_extra); - output->input_file = f; - if (!checkopaque(image)) - return 0; - } - - else - return logclose(image, f, "tmpfile", ": flush: "); - } - - else - { - fclose(f); - return logerror(image, "tmpfile", ": write failed", ""); - } - } - - else - return logerror(image, "tmpfile", ": open: ", strerror(errno)); -#else /* SIMPLIFIED_WRITE_STDIO */ - return logerror(image, "tmpfile", ": open: unsupported", ""); -#endif /* SIMPLIFIED_WRITE_STDIO */ - } - - else if (image->opts & USE_FILE) - { -#ifdef PNG_SIMPLIFIED_WRITE_STDIO_SUPPORTED - static int counter = 0; - char name[32]; - - sprintf(name, "%s%d.png", tmpf, ++counter); - - if (png_image_write_to_file(&image->image, name, convert_to_8bit, - image->buffer+16, (png_int_32)image->stride, image->colormap)) - { - initimage(output, image->opts, output->tmpfile_name, - image->stride_extra); - /* Afterwards, or freeimage will delete it! */ - strcpy(output->tmpfile_name, name); - - if (!checkopaque(image)) - return 0; - } - - else - return logerror(image, name, ": write failed", ""); -#else /* SIMPLIFIED_WRITE_STDIO */ - return logerror(image, "stdio", ": open: unsupported", ""); -#endif /* SIMPLIFIED_WRITE_STDIO */ - } - - else /* use memory */ - { - png_alloc_size_t size; - - if (png_image_write_get_memory_size(image->image, size, convert_to_8bit, - image->buffer+16, (png_int_32)image->stride, image->colormap)) - { - /* This is non-fatal but ignoring it was causing serious problems in - * the macro to be ignored: - */ - if (size > PNG_IMAGE_PNG_SIZE_MAX(image->image)) - return logerror(image, "memory", ": PNG_IMAGE_SIZE_MAX wrong", ""); - - initimage(output, image->opts, "memory", image->stride_extra); - output->input_memory = malloc(size); - - if (output->input_memory != NULL) - { - output->input_memory_size = size; - - if (png_image_write_to_memory(&image->image, output->input_memory, - &output->input_memory_size, convert_to_8bit, image->buffer+16, - (png_int_32)image->stride, image->colormap)) - { - /* This is also non-fatal but it safes safer to error out anyway: - */ - if (size != output->input_memory_size) - return logerror(image, "memory", ": memory size wrong", ""); - } - - else - return logerror(image, "memory", ": write failed", ""); - } - - else - return logerror(image, "memory", ": out of memory", ""); - } - - else - return logerror(image, "memory", ": get size:", ""); - } - - /* 'output' has an initialized temporary image, read this back in and compare - * this against the original: there should be no change since the original - * format was written unmodified unless 'convert_to_8bit' was specified. - * However, if the original image was color-mapped, a simple read will zap - * the linear, color and maybe alpha flags, this will cause spurious failures - * under some circumstances. - */ - if (read_file(output, image->image.format | FORMAT_NO_CHANGE, NULL)) - { - png_uint_32 original_format = image->image.format; - - if (convert_to_8bit) - original_format &= ~PNG_FORMAT_FLAG_LINEAR; - - if ((output->image.format & BASE_FORMATS) != - (original_format & BASE_FORMATS)) - return logerror(image, image->file_name, ": format changed on read: ", - output->file_name); - - return compare_two_images(image, output, 0/*via linear*/, NULL); - } - - else - return logerror(output, output->tmpfile_name, - ": read of new file failed", ""); -} -#endif - -static int -testimage(Image *image, png_uint_32 opts, format_list *pf) -{ - int result; - Image copy; - - /* Copy the original data, stealing it from 'image' */ - checkopaque(image); - copy = *image; - - copy.opts = opts; - copy.buffer = NULL; - copy.bufsize = 0; - copy.allocsize = 0; - - image->input_file = NULL; - image->input_memory = NULL; - image->input_memory_size = 0; - image->tmpfile_name[0] = 0; - - { - png_uint_32 counter; - Image output; - - newimage(&output); - - result = 1; - - /* Use the low bit of 'counter' to indicate whether or not to do alpha - * removal with a background color or by composting onto the image; this - * step gets skipped if it isn't relevant - */ - for (counter=0; counter<2*FORMAT_COUNT; ++counter) - if (format_isset(pf, counter >> 1)) - { - png_uint_32 format = counter >> 1; - - png_color background_color; - png_colorp background = NULL; - - /* If there is a format change that removes the alpha channel then - * the background is relevant. If the output is 8-bit color-mapped - * then a background color *must* be provided, otherwise there are - * two tests to do - one with a color, the other with NULL. The - * NULL test happens second. - */ - if ((counter & 1) == 0) - { - if ((format & PNG_FORMAT_FLAG_ALPHA) == 0 && - (image->image.format & PNG_FORMAT_FLAG_ALPHA) != 0) - { - /* Alpha/transparency will be removed, the background is - * relevant: make it a color the first time - */ - random_color(&background_color); - background = &background_color; - - /* BUT if the output is to a color-mapped 8-bit format then - * the background must always be a color, so increment 'counter' - * to skip the NULL test. - */ - if ((format & PNG_FORMAT_FLAG_COLORMAP) != 0 && - (format & PNG_FORMAT_FLAG_LINEAR) == 0) - ++counter; - } - - /* Otherwise an alpha channel is not being eliminated, just leave - * background NULL and skip the (counter & 1) NULL test. - */ - else - ++counter; - } - /* else just use NULL for background */ - - resetimage(©); - copy.opts = opts; /* in case read_file needs to change it */ - - result = read_file(©, format, background); - if (!result) - break; - - /* Make sure the file just read matches the original file. */ - result = compare_two_images(image, ©, 0/*via linear*/, background); - if (!result) - break; - -# ifdef PNG_SIMPLIFIED_WRITE_SUPPORTED - /* Write the *copy* just made to a new file to make sure the write - * side works ok. Check the conversion to sRGB if the copy is - * linear. - */ - output.opts = opts; - result = write_one_file(&output, ©, 0/*convert to 8bit*/); - if (!result) - break; - - /* Validate against the original too; the background is needed here - * as well so that compare_two_images knows what color was used. - */ - result = compare_two_images(image, &output, 0, background); - if (!result) - break; - - if ((format & PNG_FORMAT_FLAG_LINEAR) != 0 && - (format & PNG_FORMAT_FLAG_COLORMAP) == 0) - { - /* 'output' is linear, convert to the corresponding sRGB format. - */ - output.opts = opts; - result = write_one_file(&output, ©, 1/*convert to 8bit*/); - if (!result) - break; - - /* This may involve a conversion via linear; in the ideal world - * this would round-trip correctly, but libpng 1.5.7 is not the - * ideal world so allow a drift (error_via_linear). - * - * 'image' has an alpha channel but 'output' does not then there - * will a strip-alpha-channel operation (because 'output' is - * linear), handle this by composing on black when doing the - * comparison. - */ - result = compare_two_images(image, &output, 1/*via_linear*/, - background); - if (!result) - break; - } -# endif /* PNG_SIMPLIFIED_WRITE_SUPPORTED */ - } - - freeimage(&output); - } - - freeimage(©); - - return result; -} - -static int -test_one_file(const char *file_name, format_list *formats, png_uint_32 opts, - int stride_extra, int log_pass) -{ - int result; - Image image; - - if (!(opts & NO_RESEED)) - reseed(); /* ensure that the random numbers don't depend on file order */ - newimage(&image); - initimage(&image, opts, file_name, stride_extra); - result = read_one_file(&image); - if (result) - result = testimage(&image, opts, formats); - freeimage(&image); - - /* Ensure that stderr is flushed into any log file */ - fflush(stderr); - - if (log_pass) - { - if (result) - printf("PASS:"); - - else - printf("FAIL:"); - -# ifndef PNG_SIMPLIFIED_WRITE_SUPPORTED - printf(" (no write)"); -# endif - - print_opts(opts); - printf(" %s\n", file_name); - /* stdout may not be line-buffered if it is piped to a file, so: */ - fflush(stdout); - } - - else if (!result) - exit(1); - - return result; -} - -int -main(int argc, char **argv) -{ - png_uint_32 opts = FAST_WRITE | STRICT; - format_list formats; - const char *touch = NULL; - int log_pass = 0; - int redundant = 0; - int stride_extra = 0; - int retval = 0; - int c; - -#if PNG_LIBPNG_VER >= 10700 - /* This error should not exist in 1.7 or later: */ - opts |= GBG_ERROR; -#endif - - init_sRGB_to_d(); -#if 0 - init_error_via_linear(); -#endif - format_init(&formats); - reseed(); /* initialize random number seeds */ - - for (c=1; c= sizeof tmpf) - { - fflush(stdout); - fprintf(stderr, "%s: %s is too long for a temp file prefix\n", - argv[0], argv[c]); - exit(99); - } - - /* Safe: checked above */ - strncpy(tmpf, argv[c], sizeof (tmpf)-1); - } - - else - { - fflush(stdout); - fprintf(stderr, "%s: %s requires a temporary file prefix\n", - argv[0], arg); - exit(99); - } - } - else if (strcmp(arg, "--touch") == 0) - { - if (c+1 < argc) - touch = argv[++c]; - - else - { - fflush(stdout); - fprintf(stderr, "%s: %s requires a file name argument\n", - argv[0], arg); - exit(99); - } - } - else if (arg[0] == '+') - { - png_uint_32 format = formatof(arg+1); - - if (format > FORMAT_COUNT) - exit(99); - - format_set(&formats, format); - } - else if (arg[0] == '-' && arg[1] != 0 && (arg[1] != '0' || arg[2] != 0)) - { - fflush(stdout); - fprintf(stderr, "%s: unknown option: %s\n", argv[0], arg); - exit(99); - } - else - { - if (format_is_initial(&formats)) - format_default(&formats, redundant); - - if (arg[0] == '-') - { - int term = (arg[1] == '0' ? 0 : '\n'); - unsigned int ich = 0; - - /* Loop reading files, use a static buffer to simplify this and just - * stop if the name gets to long. - */ - static char buffer[4096]; - - do - { - int ch = getchar(); - - /* Don't allow '\0' in file names, and terminate with '\n' or, - * for -0, just '\0' (use -print0 to find to make this work!) - */ - if (ch == EOF || ch == term || ch == 0) - { - buffer[ich] = 0; - - if (ich > 0 && !test_one_file(buffer, &formats, opts, - stride_extra, log_pass)) - retval = 1; - - if (ch == EOF) - break; - - ich = 0; - --ich; /* so that the increment below sets it to 0 again */ - } - - else - buffer[ich] = (char)ch; - } while (++ich < sizeof buffer); - - if (ich) - { - buffer[32] = 0; - buffer[4095] = 0; - fprintf(stderr, "%s...%s: file name too long\n", buffer, - buffer+(4096-32)); - exit(99); - } - } - - else if (!test_one_file(arg, &formats, opts, stride_extra, log_pass)) - retval = 1; - } - } - - if (opts & ACCUMULATE) - { - unsigned int in; - - printf("/* contrib/libtests/pngstest-errors.h\n"); - printf(" *\n"); - printf(" * BUILT USING:" PNG_HEADER_VERSION_STRING); - printf(" *\n"); - printf(" * This code is released under the libpng license.\n"); - printf(" * For conditions of distribution and use, see the disclaimer\n"); - printf(" * and license in png.h\n"); - printf(" *\n"); - printf(" * THIS IS A MACHINE GENERATED FILE: do not edit it directly!\n"); - printf(" * Instead run:\n"); - printf(" *\n"); - printf(" * pngstest --accumulate\n"); - printf(" *\n"); - printf(" * on as many PNG files as possible; at least PNGSuite and\n"); - printf(" * contrib/libtests/testpngs.\n"); - printf(" */\n"); - - printf("static png_uint_16 gpc_error[16/*in*/][16/*out*/][4/*a*/] =\n"); - printf("{\n"); - for (in=0; in<16; ++in) - { - unsigned int out; - printf(" { /* input: %s */\n ", format_names[in]); - for (out=0; out<16; ++out) - { - unsigned int alpha; - printf(" {"); - for (alpha=0; alpha<4; ++alpha) - { - printf(" %d", gpc_error[in][out][alpha]); - if (alpha < 3) putchar(','); - } - printf(" }"); - if (out < 15) - { - putchar(','); - if (out % 4 == 3) printf("\n "); - } - } - printf("\n }"); - - if (in < 15) - putchar(','); - else - putchar('\n'); - } - printf("};\n"); - - printf("static png_uint_16 gpc_error_via_linear[16][4/*out*/][4] =\n"); - printf("{\n"); - for (in=0; in<16; ++in) - { - unsigned int out; - printf(" { /* input: %s */\n ", format_names[in]); - for (out=0; out<4; ++out) - { - unsigned int alpha; - printf(" {"); - for (alpha=0; alpha<4; ++alpha) - { - printf(" %d", gpc_error_via_linear[in][out][alpha]); - if (alpha < 3) putchar(','); - } - printf(" }"); - if (out < 3) - putchar(','); - } - printf("\n }"); - - if (in < 15) - putchar(','); - else - putchar('\n'); - } - printf("};\n"); - - printf("static png_uint_16 gpc_error_to_colormap[8/*i*/][8/*o*/][4] =\n"); - printf("{\n"); - for (in=0; in<8; ++in) - { - unsigned int out; - printf(" { /* input: %s */\n ", format_names[in]); - for (out=0; out<8; ++out) - { - unsigned int alpha; - printf(" {"); - for (alpha=0; alpha<4; ++alpha) - { - printf(" %d", gpc_error_to_colormap[in][out][alpha]); - if (alpha < 3) putchar(','); - } - printf(" }"); - if (out < 7) - { - putchar(','); - if (out % 4 == 3) printf("\n "); - } - } - printf("\n }"); - - if (in < 7) - putchar(','); - else - putchar('\n'); - } - printf("};\n"); - printf("/* END MACHINE GENERATED */\n"); - } - - if (retval == 0 && touch != NULL) - { - FILE *fsuccess = fopen(touch, "wt"); - - if (fsuccess != NULL) - { - int error = 0; - fprintf(fsuccess, "PNG simple API tests succeeded\n"); - fflush(fsuccess); - error = ferror(fsuccess); - - if (fclose(fsuccess) || error) - { - fflush(stdout); - fprintf(stderr, "%s: write failed\n", touch); - exit(99); - } - } - - else - { - fflush(stdout); - fprintf(stderr, "%s: open failed\n", touch); - exit(99); - } - } - - return retval; -} - -#else /* !PNG_SIMPLIFIED_READ_SUPPORTED */ -int main(void) -{ - fprintf(stderr, "pngstest: no read support in libpng, test skipped\n"); - /* So the test is skipped: */ - return SKIP; -} -#endif /* PNG_SIMPLIFIED_READ_SUPPORTED */ diff --git a/lib/libpng-1.6.37/contrib/libtests/pngunknown.c b/lib/libpng-1.6.37/contrib/libtests/pngunknown.c deleted file mode 100644 index 05bdd83..0000000 --- a/lib/libpng-1.6.37/contrib/libtests/pngunknown.c +++ /dev/null @@ -1,1294 +0,0 @@ - -/* pngunknown.c - test the read side unknown chunk handling - * - * Last changed in libpng 1.6.32 [August 24, 2017] - * Copyright (c) 2015,2017 Glenn Randers-Pehrson - * Written by John Cunningham Bowler - * - * This code is released under the libpng license. - * For conditions of distribution and use, see the disclaimer - * and license in png.h - * - * NOTES: - * This is a C program that is intended to be linked against libpng. It - * allows the libpng unknown handling code to be tested by interpreting - * arguments to save or discard combinations of chunks. The program is - * currently just a minimal validation for the built-in libpng facilities. - */ - -#include -#include -#include -#include - -/* Define the following to use this test against your installed libpng, rather - * than the one being built here: - */ -#ifdef PNG_FREESTANDING_TESTS -# include -#else -# include "../../png.h" -#endif - -/* 1.6.1 added support for the configure test harness, which uses 77 to indicate - * a skipped test, in earlier versions we need to succeed on a skipped test, so: - */ -#if PNG_LIBPNG_VER >= 10601 && defined(HAVE_CONFIG_H) -# define SKIP 77 -#else -# define SKIP 0 -#endif - - -/* Since this program tests the ability to change the unknown chunk handling - * these must be defined: - */ -#if defined(PNG_SET_UNKNOWN_CHUNKS_SUPPORTED) &&\ - defined(PNG_STDIO_SUPPORTED) &&\ - defined(PNG_READ_SUPPORTED) - -/* One of these must be defined to allow us to find out what happened. It is - * still useful to set unknown chunk handling without either of these in order - * to cause *known* chunks to be discarded. This can be a significant - * efficiency gain, but it can't really be tested here. - */ -#if defined(PNG_READ_USER_CHUNKS_SUPPORTED) ||\ - defined(PNG_SAVE_UNKNOWN_CHUNKS_SUPPORTED) - -#if PNG_LIBPNG_VER < 10500 -/* This deliberately lacks the const. */ -typedef png_byte *png_const_bytep; - -/* This is copied from 1.5.1 png.h: */ -#define PNG_INTERLACE_ADAM7_PASSES 7 -#define PNG_PASS_START_ROW(pass) (((1U&~(pass))<<(3-((pass)>>1)))&7) -#define PNG_PASS_START_COL(pass) (((1U& (pass))<<(3-(((pass)+1)>>1)))&7) -#define PNG_PASS_ROW_SHIFT(pass) ((pass)>2?(8-(pass))>>1:3) -#define PNG_PASS_COL_SHIFT(pass) ((pass)>1?(7-(pass))>>1:3) -#define PNG_PASS_ROWS(height, pass) (((height)+(((1<>PNG_PASS_ROW_SHIFT(pass)) -#define PNG_PASS_COLS(width, pass) (((width)+(((1<>PNG_PASS_COL_SHIFT(pass)) -#define PNG_ROW_FROM_PASS_ROW(yIn, pass) \ - (((yIn)<>(((7-(off))-(pass))<<2)) & 0xFU) | \ - ((0x01145AF0U>>(((7-(off))-(pass))<<2)) & 0xF0U)) -#define PNG_ROW_IN_INTERLACE_PASS(y, pass) \ - ((PNG_PASS_MASK(pass,0) >> ((y)&7)) & 1) -#define PNG_COL_IN_INTERLACE_PASS(x, pass) \ - ((PNG_PASS_MASK(pass,1) >> ((x)&7)) & 1) - -/* These are needed too for the default build: */ -#define PNG_WRITE_16BIT_SUPPORTED -#define PNG_READ_16BIT_SUPPORTED - -/* This comes from pnglibconf.h after 1.5: */ -#define PNG_FP_1 100000 -#define PNG_GAMMA_THRESHOLD_FIXED\ - ((png_fixed_point)(PNG_GAMMA_THRESHOLD * PNG_FP_1)) -#endif - -#if PNG_LIBPNG_VER < 10600 - /* 1.6.0 constifies many APIs. The following exists to allow pngvalid to be - * compiled against earlier versions. - */ -# define png_const_structp png_structp -#endif - -#if PNG_LIBPNG_VER < 10700 - /* Copied from libpng 1.7.0 png.h */ -#define PNG_u2(b1, b2) (((unsigned int)(b1) << 8) + (b2)) - -#define PNG_U16(b1, b2) ((png_uint_16)PNG_u2(b1, b2)) -#define PNG_U32(b1, b2, b3, b4)\ - (((png_uint_32)PNG_u2(b1, b2) << 16) + PNG_u2(b3, b4)) - -/* Constants for known chunk types. - */ -#define png_IDAT PNG_U32( 73, 68, 65, 84) -#define png_IEND PNG_U32( 73, 69, 78, 68) -#define png_IHDR PNG_U32( 73, 72, 68, 82) -#define png_PLTE PNG_U32( 80, 76, 84, 69) -#define png_bKGD PNG_U32( 98, 75, 71, 68) -#define png_cHRM PNG_U32( 99, 72, 82, 77) -#define png_eXIf PNG_U32(101, 88, 73, 102) /* registered July 2017 */ -#define png_fRAc PNG_U32(102, 82, 65, 99) /* registered, not defined */ -#define png_gAMA PNG_U32(103, 65, 77, 65) -#define png_gIFg PNG_U32(103, 73, 70, 103) -#define png_gIFt PNG_U32(103, 73, 70, 116) /* deprecated */ -#define png_gIFx PNG_U32(103, 73, 70, 120) -#define png_hIST PNG_U32(104, 73, 83, 84) -#define png_iCCP PNG_U32(105, 67, 67, 80) -#define png_iTXt PNG_U32(105, 84, 88, 116) -#define png_oFFs PNG_U32(111, 70, 70, 115) -#define png_pCAL PNG_U32(112, 67, 65, 76) -#define png_pHYs PNG_U32(112, 72, 89, 115) -#define png_sBIT PNG_U32(115, 66, 73, 84) -#define png_sCAL PNG_U32(115, 67, 65, 76) -#define png_sPLT PNG_U32(115, 80, 76, 84) -#define png_sRGB PNG_U32(115, 82, 71, 66) -#define png_sTER PNG_U32(115, 84, 69, 82) -#define png_tEXt PNG_U32(116, 69, 88, 116) -#define png_tIME PNG_U32(116, 73, 77, 69) -#define png_tRNS PNG_U32(116, 82, 78, 83) -#define png_zTXt PNG_U32(122, 84, 88, 116) - -/* Test on flag values as defined in the spec (section 5.4): */ -#define PNG_CHUNK_ANCILLARY(c) (1 & ((c) >> 29)) -#define PNG_CHUNK_CRITICAL(c) (!PNG_CHUNK_ANCILLARY(c)) -#define PNG_CHUNK_PRIVATE(c) (1 & ((c) >> 21)) -#define PNG_CHUNK_RESERVED(c) (1 & ((c) >> 13)) -#define PNG_CHUNK_SAFE_TO_COPY(c) (1 & ((c) >> 5)) - -#endif /* PNG_LIBPNG_VER < 10700 */ - -#ifdef __cplusplus -# define this not_the_cpp_this -# define new not_the_cpp_new -# define voidcast(type, value) static_cast(value) -#else -# define voidcast(type, value) (value) -#endif /* __cplusplus */ - -/* Unused formal parameter errors are removed using the following macro which is - * expected to have no bad effects on performance. - */ -#ifndef UNUSED -# if defined(__GNUC__) || defined(_MSC_VER) -# define UNUSED(param) (void)param; -# else -# define UNUSED(param) -# endif -#endif - -/* Types of chunks not known to libpng */ -#define png_vpAg PNG_U32(118, 112, 65, 103) - -/* Chunk information */ -#define PNG_INFO_tEXt 0x10000000U -#define PNG_INFO_iTXt 0x20000000U -#define PNG_INFO_zTXt 0x40000000U - -#define PNG_INFO_sTER 0x01000000U -#define PNG_INFO_vpAg 0x02000000U - -#define ABSENT 0 -#define START 1 -#define END 2 - -static struct -{ - char name[5]; - png_uint_32 flag; - png_uint_32 tag; - int unknown; /* Chunk not known to libpng */ - int all; /* Chunk set by the '-1' option */ - int position; /* position in pngtest.png */ - int keep; /* unknown handling setting */ -} chunk_info[] = { - /* Critical chunks */ - { "IDAT", PNG_INFO_IDAT, png_IDAT, 0, 0, START, 0 }, /* must be [0] */ - { "PLTE", PNG_INFO_PLTE, png_PLTE, 0, 0, ABSENT, 0 }, - - /* Non-critical chunks that libpng handles */ - /* This is a mess but it seems to be the only way to do it - there is no way - * to check for a definition outside a #if. - */ - { "bKGD", PNG_INFO_bKGD, png_bKGD, -# ifdef PNG_READ_bKGD_SUPPORTED - 0, -# else - 1, -# endif - 1, START, 0 }, - { "cHRM", PNG_INFO_cHRM, png_cHRM, -# ifdef PNG_READ_cHRM_SUPPORTED - 0, -# else - 1, -# endif - 1, START, 0 }, - { "eXIf", PNG_INFO_eXIf, png_eXIf, -# ifdef PNG_READ_eXIf_SUPPORTED - 0, -# else - 1, -# endif - 1, END, 0 }, - { "gAMA", PNG_INFO_gAMA, png_gAMA, -# ifdef PNG_READ_gAMA_SUPPORTED - 0, -# else - 1, -# endif - 1, START, 0 }, - { "hIST", PNG_INFO_hIST, png_hIST, -# ifdef PNG_READ_hIST_SUPPORTED - 0, -# else - 1, -# endif - 1, ABSENT, 0 }, - { "iCCP", PNG_INFO_iCCP, png_iCCP, -# ifdef PNG_READ_iCCP_SUPPORTED - 0, -# else - 1, -# endif - 1, ABSENT, 0 }, - { "iTXt", PNG_INFO_iTXt, png_iTXt, -# ifdef PNG_READ_iTXt_SUPPORTED - 0, -# else - 1, -# endif - 1, ABSENT, 0 }, - { "oFFs", PNG_INFO_oFFs, png_oFFs, -# ifdef PNG_READ_oFFs_SUPPORTED - 0, -# else - 1, -# endif - 1, START, 0 }, - { "pCAL", PNG_INFO_pCAL, png_pCAL, -# ifdef PNG_READ_pCAL_SUPPORTED - 0, -# else - 1, -# endif - 1, START, 0 }, - { "pHYs", PNG_INFO_pHYs, png_pHYs, -# ifdef PNG_READ_pHYs_SUPPORTED - 0, -# else - 1, -# endif - 1, START, 0 }, - { "sBIT", PNG_INFO_sBIT, png_sBIT, -# ifdef PNG_READ_sBIT_SUPPORTED - 0, -# else - 1, -# endif - 1, START, 0 }, - { "sCAL", PNG_INFO_sCAL, png_sCAL, -# ifdef PNG_READ_sCAL_SUPPORTED - 0, -# else - 1, -# endif - 1, START, 0 }, - { "sPLT", PNG_INFO_sPLT, png_sPLT, -# ifdef PNG_READ_sPLT_SUPPORTED - 0, -# else - 1, -# endif - 1, ABSENT, 0 }, - { "sRGB", PNG_INFO_sRGB, png_sRGB, -# ifdef PNG_READ_sRGB_SUPPORTED - 0, -# else - 1, -# endif - 1, START, 0 }, - { "tEXt", PNG_INFO_tEXt, png_tEXt, -# ifdef PNG_READ_tEXt_SUPPORTED - 0, -# else - 1, -# endif - 1, START, 0 }, - { "tIME", PNG_INFO_tIME, png_tIME, -# ifdef PNG_READ_tIME_SUPPORTED - 0, -# else - 1, -# endif - 1, START, 0 }, - { "tRNS", PNG_INFO_tRNS, png_tRNS, -# ifdef PNG_READ_tRNS_SUPPORTED - 0, -# else - 1, -# endif - 0, ABSENT, 0 }, - { "zTXt", PNG_INFO_zTXt, png_zTXt, -# ifdef PNG_READ_zTXt_SUPPORTED - 0, -# else - 1, -# endif - 1, END, 0 }, - - /* No libpng handling */ - { "sTER", PNG_INFO_sTER, png_sTER, 1, 1, START, 0 }, - { "vpAg", PNG_INFO_vpAg, png_vpAg, 1, 0, START, 0 }, -}; - -#define NINFO ((int)((sizeof chunk_info)/(sizeof chunk_info[0]))) - -static void -clear_keep(void) -{ - int i = NINFO; - while (--i >= 0) - chunk_info[i].keep = 0; -} - -static int -find(const char *name) -{ - int i = NINFO; - while (--i >= 0) - { - if (memcmp(chunk_info[i].name, name, 4) == 0) - break; - } - - return i; -} - -static int -findb(const png_byte *name) -{ - int i = NINFO; - while (--i >= 0) - { - if (memcmp(chunk_info[i].name, name, 4) == 0) - break; - } - - return i; -} - -static int -find_by_flag(png_uint_32 flag) -{ - int i = NINFO; - - while (--i >= 0) if (chunk_info[i].flag == flag) return i; - - fprintf(stderr, "pngunknown: internal error\n"); - exit(4); -} - -static int -ancillary(const char *name) -{ - return PNG_CHUNK_ANCILLARY(PNG_U32(name[0], name[1], name[2], name[3])); -} - -#ifdef PNG_SAVE_UNKNOWN_CHUNKS_SUPPORTED -static int -ancillaryb(const png_byte *name) -{ - return PNG_CHUNK_ANCILLARY(PNG_U32(name[0], name[1], name[2], name[3])); -} -#endif - -/* Type of an error_ptr */ -typedef struct -{ - jmp_buf error_return; - png_structp png_ptr; - png_infop info_ptr, end_ptr; - png_uint_32 before_IDAT; - png_uint_32 after_IDAT; - int error_count; - int warning_count; - int keep; /* the default value */ - const char *program; - const char *file; - const char *test; -} display; - -static const char init[] = "initialization"; -static const char cmd[] = "command line"; - -static void -init_display(display *d, const char *program) -{ - memset(d, 0, sizeof *d); - d->png_ptr = NULL; - d->info_ptr = d->end_ptr = NULL; - d->error_count = d->warning_count = 0; - d->program = program; - d->file = program; - d->test = init; -} - -static void -clean_display(display *d) -{ - png_destroy_read_struct(&d->png_ptr, &d->info_ptr, &d->end_ptr); - - /* This must not happen - it might cause an app crash */ - if (d->png_ptr != NULL || d->info_ptr != NULL || d->end_ptr != NULL) - { - fprintf(stderr, "%s(%s): png_destroy_read_struct error\n", d->file, - d->test); - exit(1); - } -} - -PNG_FUNCTION(void, display_exit, (display *d), static PNG_NORETURN) -{ - ++(d->error_count); - - if (d->png_ptr != NULL) - clean_display(d); - - /* During initialization and if this is a single command line argument set - * exit now - there is only one test, otherwise longjmp to do the next test. - */ - if (d->test == init || d->test == cmd) - exit(1); - - longjmp(d->error_return, 1); -} - -static int -display_rc(const display *d, int strict) -{ - return d->error_count + (strict ? d->warning_count : 0); -} - -/* libpng error and warning callbacks */ -PNG_FUNCTION(void, (PNGCBAPI error), (png_structp png_ptr, const char *message), - static PNG_NORETURN) -{ - display *d = (display*)png_get_error_ptr(png_ptr); - - fprintf(stderr, "%s(%s): libpng error: %s\n", d->file, d->test, message); - display_exit(d); -} - -static void PNGCBAPI -warning(png_structp png_ptr, const char *message) -{ - display *d = (display*)png_get_error_ptr(png_ptr); - - fprintf(stderr, "%s(%s): libpng warning: %s\n", d->file, d->test, message); - ++(d->warning_count); -} - -static png_uint_32 -get_valid(display *d, png_infop info_ptr) -{ - png_uint_32 flags = png_get_valid(d->png_ptr, info_ptr, (png_uint_32)~0); - - /* Map the text chunks back into the flags */ - { - png_textp text; - png_uint_32 ntext = png_get_text(d->png_ptr, info_ptr, &text, NULL); - - while (ntext > 0) switch (text[--ntext].compression) - { - case -1: - flags |= PNG_INFO_tEXt; - break; - case 0: - flags |= PNG_INFO_zTXt; - break; - case 1: - case 2: - flags |= PNG_INFO_iTXt; - break; - default: - fprintf(stderr, "%s(%s): unknown text compression %d\n", d->file, - d->test, text[ntext].compression); - display_exit(d); - } - } - - return flags; -} - -#ifdef PNG_READ_USER_CHUNKS_SUPPORTED -static int PNGCBAPI -read_callback(png_structp pp, png_unknown_chunkp pc) -{ - /* This function mimics the behavior of png_set_keep_unknown_chunks by - * returning '0' to keep the chunk and '1' to discard it. - */ - display *d = voidcast(display*, png_get_user_chunk_ptr(pp)); - int chunk = findb(pc->name); - int keep, discard; - - if (chunk < 0) /* not one in our list, so not a known chunk */ - keep = d->keep; - - else - { - keep = chunk_info[chunk].keep; - if (keep == PNG_HANDLE_CHUNK_AS_DEFAULT) - { - /* See the comments in png.h - use the default for unknown chunks, - * do not keep known chunks. - */ - if (chunk_info[chunk].unknown) - keep = d->keep; - - else - keep = PNG_HANDLE_CHUNK_NEVER; - } - } - - switch (keep) - { - default: - fprintf(stderr, "%s(%s): %d: unrecognized chunk option\n", d->file, - d->test, chunk_info[chunk].keep); - display_exit(d); - - case PNG_HANDLE_CHUNK_AS_DEFAULT: - case PNG_HANDLE_CHUNK_NEVER: - discard = 1/*handled; discard*/; - break; - - case PNG_HANDLE_CHUNK_IF_SAFE: - case PNG_HANDLE_CHUNK_ALWAYS: - discard = 0/*not handled; keep*/; - break; - } - - /* Also store information about this chunk in the display, the relevant flag - * is set if the chunk is to be kept ('not handled'.) - */ - if (chunk >= 0) if (!discard) /* stupidity to stop a GCC warning */ - { - png_uint_32 flag = chunk_info[chunk].flag; - - if (pc->location & PNG_AFTER_IDAT) - d->after_IDAT |= flag; - - else - d->before_IDAT |= flag; - } - - /* However if there is no support to store unknown chunks don't ask libpng to - * do it; there will be an png_error. - */ -# ifdef PNG_SAVE_UNKNOWN_CHUNKS_SUPPORTED - return discard; -# else - return 1; /*handled; discard*/ -# endif -} -#endif /* READ_USER_CHUNKS_SUPPORTED */ - -#ifdef PNG_SAVE_UNKNOWN_CHUNKS_SUPPORTED -static png_uint_32 -get_unknown(display *d, png_infop info_ptr, int after_IDAT) -{ - /* Create corresponding 'unknown' flags */ - png_uint_32 flags = 0; - - UNUSED(after_IDAT) - - { - png_unknown_chunkp unknown; - int num_unknown = png_get_unknown_chunks(d->png_ptr, info_ptr, &unknown); - - while (--num_unknown >= 0) - { - int chunk = findb(unknown[num_unknown].name); - - /* Chunks not known to pngunknown must be validated here; since they - * must also be unknown to libpng the 'display->keep' behavior should - * have been used. - */ - if (chunk < 0) switch (d->keep) - { - default: /* impossible */ - case PNG_HANDLE_CHUNK_AS_DEFAULT: - case PNG_HANDLE_CHUNK_NEVER: - fprintf(stderr, "%s(%s): %s: %s: unknown chunk saved\n", - d->file, d->test, d->keep ? "discard" : "default", - unknown[num_unknown].name); - ++(d->error_count); - break; - - case PNG_HANDLE_CHUNK_IF_SAFE: - if (!ancillaryb(unknown[num_unknown].name)) - { - fprintf(stderr, - "%s(%s): if-safe: %s: unknown critical chunk saved\n", - d->file, d->test, unknown[num_unknown].name); - ++(d->error_count); - break; - } - /* FALLTHROUGH */ /* (safe) */ - case PNG_HANDLE_CHUNK_ALWAYS: - break; - } - - else - flags |= chunk_info[chunk].flag; - } - } - - return flags; -} -#else /* SAVE_UNKNOWN_CHUNKS */ -static png_uint_32 -get_unknown(display *d, png_infop info_ptr, int after_IDAT) - /* Otherwise this will return the cached values set by any user callback */ -{ - UNUSED(info_ptr); - - if (after_IDAT) - return d->after_IDAT; - - else - return d->before_IDAT; -} - -# ifndef PNG_READ_USER_CHUNKS_SUPPORTED - /* The #defines above should mean this is never reached, it's just here as - * a check to ensure the logic is correct. - */ -# error No store support and no user chunk support, this will not work -# endif /* READ_USER_CHUNKS */ -#endif /* SAVE_UNKNOWN_CHUNKS */ - -static int -check(FILE *fp, int argc, const char **argv, png_uint_32p flags/*out*/, - display *d, int set_callback) -{ - int i, npasses, ipass; - png_uint_32 height; - - d->keep = PNG_HANDLE_CHUNK_AS_DEFAULT; - d->before_IDAT = 0; - d->after_IDAT = 0; - - /* Some of these errors are permanently fatal and cause an exit here, others - * are per-test and cause an error return. - */ - d->png_ptr = png_create_read_struct(PNG_LIBPNG_VER_STRING, d, error, - warning); - if (d->png_ptr == NULL) - { - fprintf(stderr, "%s(%s): could not allocate png struct\n", d->file, - d->test); - /* Terminate here, this error is not test specific. */ - exit(1); - } - - d->info_ptr = png_create_info_struct(d->png_ptr); - d->end_ptr = png_create_info_struct(d->png_ptr); - if (d->info_ptr == NULL || d->end_ptr == NULL) - { - fprintf(stderr, "%s(%s): could not allocate png info\n", d->file, - d->test); - clean_display(d); - exit(1); - } - - png_init_io(d->png_ptr, fp); - -# ifdef PNG_READ_USER_CHUNKS_SUPPORTED - /* This is only done if requested by the caller; it interferes with the - * standard store/save mechanism. - */ - if (set_callback) - png_set_read_user_chunk_fn(d->png_ptr, d, read_callback); -# else - UNUSED(set_callback) -# endif - - /* Handle each argument in turn; multiple settings are possible for the same - * chunk and multiple calls will occur (the last one should override all - * preceding ones). - */ - for (i=0; i= 10700 &&\ - !defined(PNG_SAVE_UNKNOWN_CHUNKS_SUPPORTED) - if (option < PNG_HANDLE_CHUNK_IF_SAFE) -# endif /* 1.7+ SAVE_UNKNOWN_CHUNKS */ - { - png_byte name[5]; - - memcpy(name, chunk_info[chunk].name, 5); - png_set_keep_unknown_chunks(d->png_ptr, option, name, 1); - chunk_info[chunk].keep = option; - } - continue; - } - - break; - - case 7: /* default */ - if (memcmp(argv[i], "default", 7) == 0) - { -# if PNG_LIBPNG_VER >= 10700 &&\ - !defined(PNG_SAVE_UNKNOWN_CHUNKS_SUPPORTED) - if (option < PNG_HANDLE_CHUNK_IF_SAFE) -# endif /* 1.7+ SAVE_UNKNOWN_CHUNKS */ - png_set_keep_unknown_chunks(d->png_ptr, option, NULL, 0); - - d->keep = option; - continue; - } - - break; - - case 3: /* all */ - if (memcmp(argv[i], "all", 3) == 0) - { -# if PNG_LIBPNG_VER >= 10700 &&\ - !defined(PNG_SAVE_UNKNOWN_CHUNKS_SUPPORTED) - if (option < PNG_HANDLE_CHUNK_IF_SAFE) -# endif /* 1.7+ SAVE_UNKNOWN_CHUNKS */ - png_set_keep_unknown_chunks(d->png_ptr, option, NULL, -1); - - d->keep = option; - - for (chunk = 0; chunk < NINFO; ++chunk) - if (chunk_info[chunk].all) - chunk_info[chunk].keep = option; - continue; - } - - break; - - default: /* some misplaced = */ - - break; - } - } - - fprintf(stderr, "%s(%s): %s: unrecognized chunk argument\n", d->file, - d->test, argv[i]); - display_exit(d); - } - - png_read_info(d->png_ptr, d->info_ptr); - - switch (png_get_interlace_type(d->png_ptr, d->info_ptr)) - { - case PNG_INTERLACE_NONE: - npasses = 1; - break; - - case PNG_INTERLACE_ADAM7: - npasses = PNG_INTERLACE_ADAM7_PASSES; - break; - - default: - /* Hard error because it is not test specific */ - fprintf(stderr, "%s(%s): invalid interlace type\n", d->file, d->test); - clean_display(d); - exit(1); - } - - /* Skip the image data, if IDAT is not being handled then don't do this - * because it will cause a CRC error. - */ - if (chunk_info[0/*IDAT*/].keep == PNG_HANDLE_CHUNK_AS_DEFAULT) - { - png_start_read_image(d->png_ptr); - height = png_get_image_height(d->png_ptr, d->info_ptr); - - if (npasses > 1) - { - png_uint_32 width = png_get_image_width(d->png_ptr, d->info_ptr); - - for (ipass=0; ipass 0) - { - png_uint_32 y; - - for (y=0; ypng_ptr, NULL, NULL); - } - } - } /* interlaced */ - - else /* not interlaced */ - { - png_uint_32 y; - - for (y=0; ypng_ptr, NULL, NULL); - } - } - - png_read_end(d->png_ptr, d->end_ptr); - - flags[0] = get_valid(d, d->info_ptr); - flags[1] = get_unknown(d, d->info_ptr, 0/*before IDAT*/); - - /* Only png_read_png sets PNG_INFO_IDAT! */ - flags[chunk_info[0/*IDAT*/].keep != PNG_HANDLE_CHUNK_AS_DEFAULT] |= - PNG_INFO_IDAT; - - flags[2] = get_valid(d, d->end_ptr); - flags[3] = get_unknown(d, d->end_ptr, 1/*after IDAT*/); - - clean_display(d); - - return d->keep; -} - -static void -check_error(display *d, png_uint_32 flags, const char *message) -{ - while (flags) - { - png_uint_32 flag = flags & -(png_int_32)flags; - int i = find_by_flag(flag); - - fprintf(stderr, "%s(%s): chunk %s: %s\n", d->file, d->test, - chunk_info[i].name, message); - ++(d->error_count); - - flags &= ~flag; - } -} - -static void -check_handling(display *d, int def, png_uint_32 chunks, png_uint_32 known, - png_uint_32 unknown, const char *position, int set_callback) -{ - while (chunks) - { - png_uint_32 flag = chunks & -(png_int_32)chunks; - int i = find_by_flag(flag); - int keep = chunk_info[i].keep; - const char *type; - const char *errorx = NULL; - - if (chunk_info[i].unknown) - { - if (keep == PNG_HANDLE_CHUNK_AS_DEFAULT) - { - type = "UNKNOWN (default)"; - keep = def; - } - - else - type = "UNKNOWN (specified)"; - - if (flag & known) - errorx = "chunk processed"; - - else switch (keep) - { - case PNG_HANDLE_CHUNK_AS_DEFAULT: - if (flag & unknown) - errorx = "DEFAULT: unknown chunk saved"; - break; - - case PNG_HANDLE_CHUNK_NEVER: - if (flag & unknown) - errorx = "DISCARD: unknown chunk saved"; - break; - - case PNG_HANDLE_CHUNK_IF_SAFE: - if (ancillary(chunk_info[i].name)) - { - if (!(flag & unknown)) - errorx = "IF-SAFE: unknown ancillary chunk lost"; - } - - else if (flag & unknown) - errorx = "IF-SAFE: unknown critical chunk saved"; - break; - - case PNG_HANDLE_CHUNK_ALWAYS: - if (!(flag & unknown)) - errorx = "SAVE: unknown chunk lost"; - break; - - default: - errorx = "internal error: bad keep"; - break; - } - } /* unknown chunk */ - - else /* known chunk */ - { - type = "KNOWN"; - - if (flag & known) - { - /* chunk was processed, it won't have been saved because that is - * caught below when checking for inconsistent processing. - */ - if (keep != PNG_HANDLE_CHUNK_AS_DEFAULT) - errorx = "!DEFAULT: known chunk processed"; - } - - else /* not processed */ switch (keep) - { - case PNG_HANDLE_CHUNK_AS_DEFAULT: - errorx = "DEFAULT: known chunk not processed"; - break; - - case PNG_HANDLE_CHUNK_NEVER: - if (flag & unknown) - errorx = "DISCARD: known chunk saved"; - break; - - case PNG_HANDLE_CHUNK_IF_SAFE: - if (ancillary(chunk_info[i].name)) - { - if (!(flag & unknown)) - errorx = "IF-SAFE: known ancillary chunk lost"; - } - - else if (flag & unknown) - errorx = "IF-SAFE: known critical chunk saved"; - break; - - case PNG_HANDLE_CHUNK_ALWAYS: - if (!(flag & unknown)) - errorx = "SAVE: known chunk lost"; - break; - - default: - errorx = "internal error: bad keep (2)"; - break; - } - } - - if (errorx != NULL) - { - ++(d->error_count); - fprintf(stderr, "%s(%s%s): %s %s %s: %s\n", d->file, d->test, - set_callback ? ",callback" : "", - type, chunk_info[i].name, position, errorx); - } - - chunks &= ~flag; - } -} - -static void -perform_one_test(FILE *fp, int argc, const char **argv, - png_uint_32 *default_flags, display *d, int set_callback) -{ - int def; - png_uint_32 flags[2][4]; - - rewind(fp); - clear_keep(); - memcpy(flags[0], default_flags, sizeof flags[0]); - - def = check(fp, argc, argv, flags[1], d, set_callback); - - /* If IDAT is being handled as unknown the image read is skipped and all the - * IDATs after the first end up in the end info struct, so in this case add - * IDAT to the list of unknowns. (Do this after 'check' above sets the - * chunk_info 'keep' fields.) - * - * Note that the flag setting has to be in the 'known' field to avoid - * triggering the consistency check below and the flag must only be set if - * there are multiple IDATs, so if the check above did find an unknown IDAT - * after IDAT. - */ - if (chunk_info[0/*IDAT*/].keep != PNG_HANDLE_CHUNK_AS_DEFAULT && - (flags[1][3] & PNG_INFO_IDAT) != 0) - flags[0][2] |= PNG_INFO_IDAT; - - /* Chunks should either be known or unknown, never both and this should apply - * whether the chunk is before or after the IDAT (actually, the app can - * probably change this by swapping the handling after the image, but this - * test does not do that.) - */ - check_error(d, (flags[0][0]|flags[0][2]) & (flags[0][1]|flags[0][3]), - "chunk handled inconsistently in count tests"); - check_error(d, (flags[1][0]|flags[1][2]) & (flags[1][1]|flags[1][3]), - "chunk handled inconsistently in option tests"); - - /* Now find out what happened to each chunk before and after the IDAT and - * determine if the behavior was correct. First some basic sanity checks, - * any known chunk should be known in the original count, any unknown chunk - * should be either known or unknown in the original. - */ - { - png_uint_32 test; - - test = flags[1][0] & ~flags[0][0]; - check_error(d, test, "new known chunk before IDAT"); - test = flags[1][1] & ~(flags[0][0] | flags[0][1]); - check_error(d, test, "new unknown chunk before IDAT"); - test = flags[1][2] & ~flags[0][2]; - check_error(d, test, "new known chunk after IDAT"); - test = flags[1][3] & ~(flags[0][2] | flags[0][3]); - check_error(d, test, "new unknown chunk after IDAT"); - } - - /* Now each chunk in the original list should have been handled according to - * the options set for that chunk, regardless of whether libpng knows about - * it or not. - */ - check_handling(d, def, flags[0][0] | flags[0][1], flags[1][0], flags[1][1], - "before IDAT", set_callback); - check_handling(d, def, flags[0][2] | flags[0][3], flags[1][2], flags[1][3], - "after IDAT", set_callback); -} - -static void -perform_one_test_safe(FILE *fp, int argc, const char **argv, - png_uint_32 *default_flags, display *d, const char *test) -{ - if (setjmp(d->error_return) == 0) - { - d->test = test; /* allow use of d->error_return */ -# ifdef PNG_SAVE_UNKNOWN_CHUNKS_SUPPORTED - perform_one_test(fp, argc, argv, default_flags, d, 0); -# endif -# ifdef PNG_READ_USER_CHUNKS_SUPPORTED - perform_one_test(fp, argc, argv, default_flags, d, 1); -# endif - d->test = init; /* prevent use of d->error_return */ - } -} - -static const char *standard_tests[] = -{ - "discard", "default=discard", 0, - "save", "default=save", 0, - "if-safe", "default=if-safe", 0, - "vpAg", "vpAg=if-safe", 0, - "sTER", "sTER=if-safe", 0, - "IDAT", "default=discard", "IDAT=save", 0, - "sAPI", "bKGD=save", "cHRM=save", "gAMA=save", "all=discard", "iCCP=save", - "sBIT=save", "sRGB=save", "eXIf=save", 0, - 0/*end*/ -}; - -static PNG_NORETURN void -usage(const char *program, const char *reason) -{ - fprintf(stderr, "pngunknown: %s: usage:\n %s [--strict] " - "--default|{(CHNK|default|all)=(default|discard|if-safe|save)} " - "testfile.png\n", reason, program); - exit(99); -} - -int -main(int argc, const char **argv) -{ - FILE *fp; - png_uint_32 default_flags[4/*valid,unknown{before,after}*/]; - int strict = 0, default_tests = 0; - const char *count_argv = "default=save"; - const char *touch_file = NULL; - display d; - - init_display(&d, argv[0]); - - while (++argv, --argc > 0) - { - if (strcmp(*argv, "--strict") == 0) - strict = 1; - - else if (strcmp(*argv, "--default") == 0) - default_tests = 1; - - else if (strcmp(*argv, "--touch") == 0) - { - if (argc > 1) - touch_file = *++argv, --argc; - - else - usage(d.program, "--touch: missing file name"); - } - - else - break; - } - - /* A file name is required, but there should be no other arguments if - * --default was specified. - */ - if (argc <= 0) - usage(d.program, "missing test file"); - - /* GCC BUG: if (default_tests && argc != 1) triggers some weird GCC argc - * optimization which causes warnings with -Wstrict-overflow! - */ - else if (default_tests) if (argc != 1) - usage(d.program, "extra arguments"); - - /* The name of the test file is the last argument; remove it. */ - d.file = argv[--argc]; - - fp = fopen(d.file, "rb"); - if (fp == NULL) - { - perror(d.file); - exit(99); - } - - /* First find all the chunks, known and unknown, in the test file, a failure - * here aborts the whole test. - * - * If 'save' is supported then the normal saving method should happen, - * otherwise if 'read' is supported then the read callback will do the - * same thing. If both are supported the 'read' callback won't be - * instantiated by default. If 'save' is *not* supported then a user - * callback is required even though we can call png_get_unknown_chunks. - */ - if (check(fp, 1, &count_argv, default_flags, &d, -# ifdef PNG_SAVE_UNKNOWN_CHUNKS_SUPPORTED - 0 -# else - 1 -# endif - ) != PNG_HANDLE_CHUNK_ALWAYS) - { - fprintf(stderr, "%s: %s: internal error\n", d.program, d.file); - exit(99); - } - - /* Now find what the various supplied options cause to change: */ - if (!default_tests) - { - d.test = cmd; /* acts as a flag to say exit, do not longjmp */ -# ifdef PNG_SAVE_UNKNOWN_CHUNKS_SUPPORTED - perform_one_test(fp, argc, argv, default_flags, &d, 0); -# endif -# ifdef PNG_READ_USER_CHUNKS_SUPPORTED - perform_one_test(fp, argc, argv, default_flags, &d, 1); -# endif - d.test = init; - } - - else - { - const char **test = standard_tests; - - /* Set the exit_test pointer here so we can continue after a libpng error. - * NOTE: this leaks memory because the png_struct data from the failing - * test is never freed. - */ - while (*test) - { - const char *this_test = *test++; - const char **next = test; - int count = display_rc(&d, strict), new_count; - const char *result; - int arg_count = 0; - - while (*next) ++next, ++arg_count; - - perform_one_test_safe(fp, arg_count, test, default_flags, &d, - this_test); - - new_count = display_rc(&d, strict); - - if (new_count == count) - result = "PASS"; - - else - result = "FAIL"; - - printf("%s: %s %s\n", result, d.program, this_test); - - test = next+1; - } - } - - fclose(fp); - - if (display_rc(&d, strict) == 0) - { - /* Success, touch the success file if appropriate */ - if (touch_file != NULL) - { - FILE *fsuccess = fopen(touch_file, "wt"); - - if (fsuccess != NULL) - { - int err = 0; - fprintf(fsuccess, "PNG unknown tests succeeded\n"); - fflush(fsuccess); - err = ferror(fsuccess); - - if (fclose(fsuccess) || err) - { - fprintf(stderr, "%s: write failed\n", touch_file); - exit(99); - } - } - - else - { - fprintf(stderr, "%s: open failed\n", touch_file); - exit(99); - } - } - - return 0; - } - - return 1; -} - -#else /* !(READ_USER_CHUNKS || SAVE_UNKNOWN_CHUNKS) */ -int -main(void) -{ - fprintf(stderr, - " test ignored: no support to find out about unknown chunks\n"); - /* So the test is skipped: */ - return SKIP; -} -#endif /* READ_USER_CHUNKS || SAVE_UNKNOWN_CHUNKS */ - -#else /* !(SET_UNKNOWN_CHUNKS && READ) */ -int -main(void) -{ - fprintf(stderr, - " test ignored: no support to modify unknown chunk handling\n"); - /* So the test is skipped: */ - return SKIP; -} -#endif /* SET_UNKNOWN_CHUNKS && READ*/ diff --git a/lib/libpng-1.6.37/contrib/libtests/pngvalid.c b/lib/libpng-1.6.37/contrib/libtests/pngvalid.c deleted file mode 100644 index d800110..0000000 --- a/lib/libpng-1.6.37/contrib/libtests/pngvalid.c +++ /dev/null @@ -1,12230 +0,0 @@ - -/* pngvalid.c - validate libpng by constructing then reading png files. - * - * Last changed in libpng 1.6.31 [July 27, 2017] - * Copyright (c) 2014-2017 John Cunningham Bowler - * - * This code is released under the libpng license. - * For conditions of distribution and use, see the disclaimer - * and license in png.h - * - * NOTES: - * This is a C program that is intended to be linked against libpng. It - * generates bitmaps internally, stores them as PNG files (using the - * sequential write code) then reads them back (using the sequential - * read code) and validates that the result has the correct data. - * - * The program can be modified and extended to test the correctness of - * transformations performed by libpng. - */ - -#define _POSIX_SOURCE 1 -#define _ISOC99_SOURCE 1 /* For floating point */ -#define _GNU_SOURCE 1 /* For the floating point exception extension */ -#define _BSD_SOURCE 1 /* For the floating point exception extension */ - -#include -#include - -#if defined(HAVE_CONFIG_H) && !defined(PNG_NO_CONFIG_H) -# include -#endif - -#ifdef HAVE_FEENABLEEXCEPT /* from config.h, if included */ -# include -#endif - -#ifndef FE_DIVBYZERO -# define FE_DIVBYZERO 0 -#endif -#ifndef FE_INVALID -# define FE_INVALID 0 -#endif -#ifndef FE_OVERFLOW -# define FE_OVERFLOW 0 -#endif - -/* Define the following to use this test against your installed libpng, rather - * than the one being built here: - */ -#ifdef PNG_FREESTANDING_TESTS -# include -#else -# include "../../png.h" -#endif - -#ifdef PNG_ZLIB_HEADER -# include PNG_ZLIB_HEADER -#else -# include /* For crc32 */ -#endif - -/* 1.6.1 added support for the configure test harness, which uses 77 to indicate - * a skipped test, in earlier versions we need to succeed on a skipped test, so: - */ -#if PNG_LIBPNG_VER >= 10601 && defined(HAVE_CONFIG_H) -# define SKIP 77 -#else -# define SKIP 0 -#endif - -/* pngvalid requires write support and one of the fixed or floating point APIs. - */ -#if defined(PNG_WRITE_SUPPORTED) &&\ - (defined(PNG_FIXED_POINT_SUPPORTED) || defined(PNG_FLOATING_POINT_SUPPORTED)) - -#if PNG_LIBPNG_VER < 10500 -/* This deliberately lacks the const. */ -typedef png_byte *png_const_bytep; - -/* This is copied from 1.5.1 png.h: */ -#define PNG_INTERLACE_ADAM7_PASSES 7 -#define PNG_PASS_START_ROW(pass) (((1U&~(pass))<<(3-((pass)>>1)))&7) -#define PNG_PASS_START_COL(pass) (((1U& (pass))<<(3-(((pass)+1)>>1)))&7) -#define PNG_PASS_ROW_SHIFT(pass) ((pass)>2?(8-(pass))>>1:3) -#define PNG_PASS_COL_SHIFT(pass) ((pass)>1?(7-(pass))>>1:3) -#define PNG_PASS_ROWS(height, pass) (((height)+(((1<>PNG_PASS_ROW_SHIFT(pass)) -#define PNG_PASS_COLS(width, pass) (((width)+(((1<>PNG_PASS_COL_SHIFT(pass)) -#define PNG_ROW_FROM_PASS_ROW(yIn, pass) \ - (((yIn)<>(((7-(off))-(pass))<<2)) & 0xFU) | \ - ((0x01145AF0U>>(((7-(off))-(pass))<<2)) & 0xF0U)) -#define PNG_ROW_IN_INTERLACE_PASS(y, pass) \ - ((PNG_PASS_MASK(pass,0) >> ((y)&7)) & 1) -#define PNG_COL_IN_INTERLACE_PASS(x, pass) \ - ((PNG_PASS_MASK(pass,1) >> ((x)&7)) & 1) - -/* These are needed too for the default build: */ -#define PNG_WRITE_16BIT_SUPPORTED -#define PNG_READ_16BIT_SUPPORTED - -/* This comes from pnglibconf.h after 1.5: */ -#define PNG_FP_1 100000 -#define PNG_GAMMA_THRESHOLD_FIXED\ - ((png_fixed_point)(PNG_GAMMA_THRESHOLD * PNG_FP_1)) -#endif - -#if PNG_LIBPNG_VER < 10600 - /* 1.6.0 constifies many APIs, the following exists to allow pngvalid to be - * compiled against earlier versions. - */ -# define png_const_structp png_structp -#endif - -#ifndef RELEASE_BUILD - /* RELEASE_BUILD is true for releases and release candidates: */ -# define RELEASE_BUILD (PNG_LIBPNG_BUILD_BASE_TYPE >= PNG_LIBPNG_BUILD_RC) -#endif -#if RELEASE_BUILD -# define debugonly(something) -#else /* !RELEASE_BUILD */ -# define debugonly(something) something -#endif /* !RELEASE_BUILD */ - -#include /* For floating point constants */ -#include /* For malloc */ -#include /* For memcpy, memset */ -#include /* For floor */ - -/* Convenience macros. */ -#define CHUNK(a,b,c,d) (((a)<<24)+((b)<<16)+((c)<<8)+(d)) -#define CHUNK_IHDR CHUNK(73,72,68,82) -#define CHUNK_PLTE CHUNK(80,76,84,69) -#define CHUNK_IDAT CHUNK(73,68,65,84) -#define CHUNK_IEND CHUNK(73,69,78,68) -#define CHUNK_cHRM CHUNK(99,72,82,77) -#define CHUNK_gAMA CHUNK(103,65,77,65) -#define CHUNK_sBIT CHUNK(115,66,73,84) -#define CHUNK_sRGB CHUNK(115,82,71,66) - -/* Unused formal parameter errors are removed using the following macro which is - * expected to have no bad effects on performance. - */ -#ifndef UNUSED -# if defined(__GNUC__) || defined(_MSC_VER) -# define UNUSED(param) (void)param; -# else -# define UNUSED(param) -# endif -#endif - -/***************************** EXCEPTION HANDLING *****************************/ -#ifdef PNG_FREESTANDING_TESTS -# include -#else -# include "../visupng/cexcept.h" -#endif - -#ifdef __cplusplus -# define this not_the_cpp_this -# define new not_the_cpp_new -# define voidcast(type, value) static_cast(value) -#else -# define voidcast(type, value) (value) -#endif /* __cplusplus */ - -struct png_store; -define_exception_type(struct png_store*); - -/* The following are macros to reduce typing everywhere where the well known - * name 'the_exception_context' must be defined. - */ -#define anon_context(ps) struct exception_context *the_exception_context = \ - &(ps)->exception_context -#define context(ps,fault) anon_context(ps); png_store *fault - -/* This macro returns the number of elements in an array as an (unsigned int), - * it is necessary to avoid the inability of certain versions of GCC to use - * the value of a compile-time constant when performing range checks. It must - * be passed an array name. - */ -#define ARRAY_SIZE(a) ((unsigned int)((sizeof (a))/(sizeof (a)[0]))) - -/* GCC BUG 66447 (https://gcc.gnu.org/bugzilla/show_bug.cgi?id=66447) requires - * some broken GCC versions to be fixed up to avoid invalid whining about auto - * variables that are *not* changed within the scope of a setjmp being changed. - * - * Feel free to extend the list of broken versions. - */ -#define is_gnu(major,minor)\ - (defined __GNUC__) && __GNUC__ == (major) && __GNUC_MINOR__ == (minor) -#define is_gnu_patch(major,minor,patch)\ - is_gnu(major,minor) && __GNUC_PATCHLEVEL__ == 0 -/* For the moment just do it always; all versions of GCC seem to be broken: */ -#ifdef __GNUC__ - const void * volatile make_volatile_for_gnu; -# define gnu_volatile(x) make_volatile_for_gnu = &x; -#else /* !GNUC broken versions */ -# define gnu_volatile(x) -#endif /* !GNUC broken versions */ - -/******************************* UTILITIES ************************************/ -/* Error handling is particularly problematic in production code - error - * handlers often themselves have bugs which lead to programs that detect - * minor errors crashing. The following functions deal with one very - * common class of errors in error handlers - attempting to format error or - * warning messages into buffers that are too small. - */ -static size_t safecat(char *buffer, size_t bufsize, size_t pos, - const char *cat) -{ - while (pos < bufsize && cat != NULL && *cat != 0) - buffer[pos++] = *cat++; - - if (pos >= bufsize) - pos = bufsize-1; - - buffer[pos] = 0; - return pos; -} - -static size_t safecatn(char *buffer, size_t bufsize, size_t pos, int n) -{ - char number[64]; - sprintf(number, "%d", n); - return safecat(buffer, bufsize, pos, number); -} - -#ifdef PNG_READ_TRANSFORMS_SUPPORTED -static size_t safecatd(char *buffer, size_t bufsize, size_t pos, double d, - int precision) -{ - char number[64]; - sprintf(number, "%.*f", precision, d); - return safecat(buffer, bufsize, pos, number); -} -#endif - -static const char invalid[] = "invalid"; -static const char sep[] = ": "; - -static const char *colour_types[8] = -{ - "grayscale", invalid, "truecolour", "indexed-colour", - "grayscale with alpha", invalid, "truecolour with alpha", invalid -}; - -#ifdef PNG_READ_TRANSFORMS_SUPPORTED -/* Convert a double precision value to fixed point. */ -static png_fixed_point -fix(double d) -{ - d = floor(d * PNG_FP_1 + .5); - return (png_fixed_point)d; -} -#endif /* PNG_READ_SUPPORTED */ - -/* Generate random bytes. This uses a boring repeatable algorithm and it - * is implemented here so that it gives the same set of numbers on every - * architecture. It's a linear congruential generator (Knuth or Sedgewick - * "Algorithms") but it comes from the 'feedback taps' table in Horowitz and - * Hill, "The Art of Electronics" (Pseudo-Random Bit Sequences and Noise - * Generation.) - */ -static void -make_random_bytes(png_uint_32* seed, void* pv, size_t size) -{ - png_uint_32 u0 = seed[0], u1 = seed[1]; - png_bytep bytes = voidcast(png_bytep, pv); - - /* There are thirty three bits, the next bit in the sequence is bit-33 XOR - * bit-20. The top 1 bit is in u1, the bottom 32 are in u0. - */ - size_t i; - for (i=0; i> (20-8)) ^ ((u1 << 7) | (u0 >> (32-7)))) & 0xff; - u1 <<= 8; - u1 |= u0 >> 24; - u0 <<= 8; - u0 |= u; - *bytes++ = (png_byte)u; - } - - seed[0] = u0; - seed[1] = u1; -} - -static void -make_four_random_bytes(png_uint_32* seed, png_bytep bytes) -{ - make_random_bytes(seed, bytes, 4); -} - -#if defined PNG_READ_SUPPORTED || defined PNG_WRITE_tRNS_SUPPORTED ||\ - defined PNG_WRITE_FILTER_SUPPORTED -static void -randomize(void *pv, size_t size) -{ - static png_uint_32 random_seed[2] = {0x56789abc, 0xd}; - make_random_bytes(random_seed, pv, size); -} - -#define R8(this) randomize(&(this), sizeof (this)) - -#ifdef PNG_READ_SUPPORTED -static png_byte -random_byte(void) -{ - unsigned char b1[1]; - randomize(b1, sizeof b1); - return b1[0]; -} -#endif /* READ */ - -static png_uint_16 -random_u16(void) -{ - unsigned char b2[2]; - randomize(b2, sizeof b2); - return png_get_uint_16(b2); -} - -#if defined PNG_READ_RGB_TO_GRAY_SUPPORTED ||\ - defined PNG_READ_FILLER_SUPPORTED -static png_uint_32 -random_u32(void) -{ - unsigned char b4[4]; - randomize(b4, sizeof b4); - return png_get_uint_32(b4); -} -#endif /* READ_FILLER || READ_RGB_TO_GRAY */ - -#endif /* READ || WRITE_tRNS || WRITE_FILTER */ - -#if defined PNG_READ_TRANSFORMS_SUPPORTED ||\ - defined PNG_WRITE_FILTER_SUPPORTED -static unsigned int -random_mod(unsigned int max) -{ - return random_u16() % max; /* 0 .. max-1 */ -} -#endif /* READ_TRANSFORMS || WRITE_FILTER */ - -#if (defined PNG_READ_RGB_TO_GRAY_SUPPORTED) ||\ - (defined PNG_READ_FILLER_SUPPORTED) -static int -random_choice(void) -{ - return random_byte() & 1; -} -#endif /* READ_RGB_TO_GRAY || READ_FILLER */ - -/* A numeric ID based on PNG file characteristics. The 'do_interlace' field - * simply records whether pngvalid did the interlace itself or whether it - * was done by libpng. Width and height must be less than 256. 'palette' is an - * index of the palette to use for formats with a palette otherwise a boolean - * indicating if a tRNS chunk was generated. - */ -#define FILEID(col, depth, palette, interlace, width, height, do_interlace) \ - ((png_uint_32)((col) + ((depth)<<3) + ((palette)<<8) + ((interlace)<<13) + \ - (((do_interlace)!=0)<<15) + ((width)<<16) + ((height)<<24))) - -#define COL_FROM_ID(id) ((png_byte)((id)& 0x7U)) -#define DEPTH_FROM_ID(id) ((png_byte)(((id) >> 3) & 0x1fU)) -#define PALETTE_FROM_ID(id) (((id) >> 8) & 0x1f) -#define INTERLACE_FROM_ID(id) ((png_byte)(((id) >> 13) & 0x3)) -#define DO_INTERLACE_FROM_ID(id) ((int)(((id)>>15) & 1)) -#define WIDTH_FROM_ID(id) (((id)>>16) & 0xff) -#define HEIGHT_FROM_ID(id) (((id)>>24) & 0xff) - -/* Utility to construct a standard name for a standard image. */ -static size_t -standard_name(char *buffer, size_t bufsize, size_t pos, png_byte colour_type, - int bit_depth, unsigned int npalette, int interlace_type, - png_uint_32 w, png_uint_32 h, int do_interlace) -{ - pos = safecat(buffer, bufsize, pos, colour_types[colour_type]); - if (colour_type == 3) /* must have a palette */ - { - pos = safecat(buffer, bufsize, pos, "["); - pos = safecatn(buffer, bufsize, pos, npalette); - pos = safecat(buffer, bufsize, pos, "]"); - } - - else if (npalette != 0) - pos = safecat(buffer, bufsize, pos, "+tRNS"); - - pos = safecat(buffer, bufsize, pos, " "); - pos = safecatn(buffer, bufsize, pos, bit_depth); - pos = safecat(buffer, bufsize, pos, " bit"); - - if (interlace_type != PNG_INTERLACE_NONE) - { - pos = safecat(buffer, bufsize, pos, " interlaced"); - if (do_interlace) - pos = safecat(buffer, bufsize, pos, "(pngvalid)"); - else - pos = safecat(buffer, bufsize, pos, "(libpng)"); - } - - if (w > 0 || h > 0) - { - pos = safecat(buffer, bufsize, pos, " "); - pos = safecatn(buffer, bufsize, pos, w); - pos = safecat(buffer, bufsize, pos, "x"); - pos = safecatn(buffer, bufsize, pos, h); - } - - return pos; -} - -static size_t -standard_name_from_id(char *buffer, size_t bufsize, size_t pos, png_uint_32 id) -{ - return standard_name(buffer, bufsize, pos, COL_FROM_ID(id), - DEPTH_FROM_ID(id), PALETTE_FROM_ID(id), INTERLACE_FROM_ID(id), - WIDTH_FROM_ID(id), HEIGHT_FROM_ID(id), DO_INTERLACE_FROM_ID(id)); -} - -/* Convenience API and defines to list valid formats. Note that 16 bit read and - * write support is required to do 16 bit read tests (we must be able to make a - * 16 bit image to test!) - */ -#ifdef PNG_WRITE_16BIT_SUPPORTED -# define WRITE_BDHI 4 -# ifdef PNG_READ_16BIT_SUPPORTED -# define READ_BDHI 4 -# define DO_16BIT -# endif -#else -# define WRITE_BDHI 3 -#endif -#ifndef DO_16BIT -# define READ_BDHI 3 -#endif - -/* The following defines the number of different palettes to generate for - * each log bit depth of a colour type 3 standard image. - */ -#define PALETTE_COUNT(bit_depth) ((bit_depth) > 4 ? 1U : 16U) - -static int -next_format(png_bytep colour_type, png_bytep bit_depth, - unsigned int* palette_number, int low_depth_gray, int tRNS) -{ - if (*bit_depth == 0) - { - *colour_type = 0; - if (low_depth_gray) - *bit_depth = 1; - else - *bit_depth = 8; - *palette_number = 0; - return 1; - } - - if (*colour_type < 4/*no alpha channel*/) - { - /* Add multiple palettes for colour type 3, one image with tRNS - * and one without for other non-alpha formats: - */ - unsigned int pn = ++*palette_number; - png_byte ct = *colour_type; - - if (((ct == 0/*GRAY*/ || ct/*RGB*/ == 2) && tRNS && pn < 2) || - (ct == 3/*PALETTE*/ && pn < PALETTE_COUNT(*bit_depth))) - return 1; - - /* No: next bit depth */ - *palette_number = 0; - } - - *bit_depth = (png_byte)(*bit_depth << 1); - - /* Palette images are restricted to 8 bit depth */ - if (*bit_depth <= 8 -#ifdef DO_16BIT - || (*colour_type != 3 && *bit_depth <= 16) -#endif - ) - return 1; - - /* Move to the next color type, or return 0 at the end. */ - switch (*colour_type) - { - case 0: - *colour_type = 2; - *bit_depth = 8; - return 1; - - case 2: - *colour_type = 3; - *bit_depth = 1; - return 1; - - case 3: - *colour_type = 4; - *bit_depth = 8; - return 1; - - case 4: - *colour_type = 6; - *bit_depth = 8; - return 1; - - default: - return 0; - } -} - -#ifdef PNG_READ_TRANSFORMS_SUPPORTED -static unsigned int -sample(png_const_bytep row, png_byte colour_type, png_byte bit_depth, - png_uint_32 x, unsigned int sample_index, int swap16, int littleendian) -{ - png_uint_32 bit_index, result; - - /* Find a sample index for the desired sample: */ - x *= bit_depth; - bit_index = x; - - if ((colour_type & 1) == 0) /* !palette */ - { - if (colour_type & 2) - bit_index *= 3; - - if (colour_type & 4) - bit_index += x; /* Alpha channel */ - - /* Multiple channels; select one: */ - if (colour_type & (2+4)) - bit_index += sample_index * bit_depth; - } - - /* Return the sample from the row as an integer. */ - row += bit_index >> 3; - result = *row; - - if (bit_depth == 8) - return result; - - else if (bit_depth > 8) - { - if (swap16) - return (*++row << 8) + result; - else - return (result << 8) + *++row; - } - - /* Less than 8 bits per sample. By default PNG has the big end of - * the egg on the left of the screen, but if littleendian is set - * then the big end is on the right. - */ - bit_index &= 7; - - if (!littleendian) - bit_index = 8-bit_index-bit_depth; - - return (result >> bit_index) & ((1U<> 3] & ~destMask; - unsigned int sourceByte = fromBuffer[fromIndex >> 3]; - - /* Don't rely on << or >> supporting '0' here, just in case: */ - fromIndex &= 7; - if (littleendian) - { - if (fromIndex > 0) sourceByte >>= fromIndex; - if ((toIndex & 7) > 0) sourceByte <<= toIndex & 7; - } - - else - { - if (fromIndex > 0) sourceByte <<= fromIndex; - if ((toIndex & 7) > 0) sourceByte >>= toIndex & 7; - } - - toBuffer[toIndex >> 3] = (png_byte)(destByte | (sourceByte & destMask)); - } - else /* One or more bytes */ - memmove(toBuffer+(toIndex>>3), fromBuffer+(fromIndex>>3), pixelSize>>3); -} - -#ifdef PNG_READ_SUPPORTED -/* Copy a complete row of pixels, taking into account potential partial - * bytes at the end. - */ -static void -row_copy(png_bytep toBuffer, png_const_bytep fromBuffer, unsigned int bitWidth, - int littleendian) -{ - memcpy(toBuffer, fromBuffer, bitWidth >> 3); - - if ((bitWidth & 7) != 0) - { - unsigned int mask; - - toBuffer += bitWidth >> 3; - fromBuffer += bitWidth >> 3; - if (littleendian) - mask = 0xff << (bitWidth & 7); - else - mask = 0xff >> (bitWidth & 7); - *toBuffer = (png_byte)((*toBuffer & mask) | (*fromBuffer & ~mask)); - } -} - -/* Compare pixels - they are assumed to start at the first byte in the - * given buffers. - */ -static int -pixel_cmp(png_const_bytep pa, png_const_bytep pb, png_uint_32 bit_width) -{ -#if PNG_LIBPNG_VER < 10506 - if (memcmp(pa, pb, bit_width>>3) == 0) - { - png_uint_32 p; - - if ((bit_width & 7) == 0) return 0; - - /* Ok, any differences? */ - p = pa[bit_width >> 3]; - p ^= pb[bit_width >> 3]; - - if (p == 0) return 0; - - /* There are, but they may not be significant, remove the bits - * after the end (the low order bits in PNG.) - */ - bit_width &= 7; - p >>= 8-bit_width; - - if (p == 0) return 0; - } -#else - /* From libpng-1.5.6 the overwrite should be fixed, so compare the trailing - * bits too: - */ - if (memcmp(pa, pb, (bit_width+7)>>3) == 0) - return 0; -#endif - - /* Return the index of the changed byte. */ - { - png_uint_32 where = 0; - - while (pa[where] == pb[where]) ++where; - return 1+where; - } -} -#endif /* PNG_READ_SUPPORTED */ - -/*************************** BASIC PNG FILE WRITING ***************************/ -/* A png_store takes data from the sequential writer or provides data - * to the sequential reader. It can also store the result of a PNG - * write for later retrieval. - */ -#define STORE_BUFFER_SIZE 500 /* arbitrary */ -typedef struct png_store_buffer -{ - struct png_store_buffer* prev; /* NOTE: stored in reverse order */ - png_byte buffer[STORE_BUFFER_SIZE]; -} png_store_buffer; - -#define FILE_NAME_SIZE 64 - -typedef struct store_palette_entry /* record of a single palette entry */ -{ - png_byte red; - png_byte green; - png_byte blue; - png_byte alpha; -} store_palette_entry, store_palette[256]; - -typedef struct png_store_file -{ - struct png_store_file* next; /* as many as you like... */ - char name[FILE_NAME_SIZE]; - unsigned int IDAT_bits; /* Number of bits in IDAT size */ - png_uint_32 IDAT_size; /* Total size of IDAT data */ - png_uint_32 id; /* must be correct (see FILEID) */ - size_t datacount; /* In this (the last) buffer */ - png_store_buffer data; /* Last buffer in file */ - int npalette; /* Number of entries in palette */ - store_palette_entry* palette; /* May be NULL */ -} png_store_file; - -/* The following is a pool of memory allocated by a single libpng read or write - * operation. - */ -typedef struct store_pool -{ - struct png_store *store; /* Back pointer */ - struct store_memory *list; /* List of allocated memory */ - png_byte mark[4]; /* Before and after data */ - - /* Statistics for this run. */ - png_alloc_size_t max; /* Maximum single allocation */ - png_alloc_size_t current; /* Current allocation */ - png_alloc_size_t limit; /* Highest current allocation */ - png_alloc_size_t total; /* Total allocation */ - - /* Overall statistics (retained across successive runs). */ - png_alloc_size_t max_max; - png_alloc_size_t max_limit; - png_alloc_size_t max_total; -} store_pool; - -typedef struct png_store -{ - /* For cexcept.h exception handling - simply store one of these; - * the context is a self pointer but it may point to a different - * png_store (in fact it never does in this program.) - */ - struct exception_context - exception_context; - - unsigned int verbose :1; - unsigned int treat_warnings_as_errors :1; - unsigned int expect_error :1; - unsigned int expect_warning :1; - unsigned int saw_warning :1; - unsigned int speed :1; - unsigned int progressive :1; /* use progressive read */ - unsigned int validated :1; /* used as a temporary flag */ - int nerrors; - int nwarnings; - int noptions; /* number of options below: */ - struct { - unsigned char option; /* option number, 0..30 */ - unsigned char setting; /* setting (unset,invalid,on,off) */ - } options[16]; - char test[128]; /* Name of test */ - char error[256]; - - /* Share fields */ - png_uint_32 chunklen; /* Length of chunk+overhead (chunkpos >= 8) */ - png_uint_32 chunktype;/* Type of chunk (valid if chunkpos >= 4) */ - png_uint_32 chunkpos; /* Position in chunk */ - png_uint_32 IDAT_size;/* Accumulated IDAT size in .new */ - unsigned int IDAT_bits;/* Cache of the file store value */ - - /* Read fields */ - png_structp pread; /* Used to read a saved file */ - png_infop piread; - png_store_file* current; /* Set when reading */ - png_store_buffer* next; /* Set when reading */ - size_t readpos; /* Position in *next */ - png_byte* image; /* Buffer for reading interlaced images */ - size_t cb_image; /* Size of this buffer */ - size_t cb_row; /* Row size of the image(s) */ - uLong IDAT_crc; - png_uint_32 IDAT_len; /* Used when re-chunking IDAT chunks */ - png_uint_32 IDAT_pos; /* Used when re-chunking IDAT chunks */ - png_uint_32 image_h; /* Number of rows in a single image */ - store_pool read_memory_pool; - - /* Write fields */ - png_store_file* saved; - png_structp pwrite; /* Used when writing a new file */ - png_infop piwrite; - size_t writepos; /* Position in .new */ - char wname[FILE_NAME_SIZE]; - png_store_buffer new; /* The end of the new PNG file being written. */ - store_pool write_memory_pool; - store_palette_entry* palette; - int npalette; -} png_store; - -/* Initialization and cleanup */ -static void -store_pool_mark(png_bytep mark) -{ - static png_uint_32 store_seed[2] = { 0x12345678, 1}; - - make_four_random_bytes(store_seed, mark); -} - -#ifdef PNG_READ_TRANSFORMS_SUPPORTED -/* Use this for random 32 bit values; this function makes sure the result is - * non-zero. - */ -static png_uint_32 -random_32(void) -{ - - for (;;) - { - png_byte mark[4]; - png_uint_32 result; - - store_pool_mark(mark); - result = png_get_uint_32(mark); - - if (result != 0) - return result; - } -} -#endif /* PNG_READ_SUPPORTED */ - -static void -store_pool_init(png_store *ps, store_pool *pool) -{ - memset(pool, 0, sizeof *pool); - - pool->store = ps; - pool->list = NULL; - pool->max = pool->current = pool->limit = pool->total = 0; - pool->max_max = pool->max_limit = pool->max_total = 0; - store_pool_mark(pool->mark); -} - -static void -store_init(png_store* ps) -{ - memset(ps, 0, sizeof *ps); - init_exception_context(&ps->exception_context); - store_pool_init(ps, &ps->read_memory_pool); - store_pool_init(ps, &ps->write_memory_pool); - ps->verbose = 0; - ps->treat_warnings_as_errors = 0; - ps->expect_error = 0; - ps->expect_warning = 0; - ps->saw_warning = 0; - ps->speed = 0; - ps->progressive = 0; - ps->validated = 0; - ps->nerrors = ps->nwarnings = 0; - ps->pread = NULL; - ps->piread = NULL; - ps->saved = ps->current = NULL; - ps->next = NULL; - ps->readpos = 0; - ps->image = NULL; - ps->cb_image = 0; - ps->cb_row = 0; - ps->image_h = 0; - ps->pwrite = NULL; - ps->piwrite = NULL; - ps->writepos = 0; - ps->chunkpos = 8; - ps->chunktype = 0; - ps->chunklen = 16; - ps->IDAT_size = 0; - ps->IDAT_bits = 0; - ps->new.prev = NULL; - ps->palette = NULL; - ps->npalette = 0; - ps->noptions = 0; -} - -static void -store_freebuffer(png_store_buffer* psb) -{ - if (psb->prev) - { - store_freebuffer(psb->prev); - free(psb->prev); - psb->prev = NULL; - } -} - -static void -store_freenew(png_store *ps) -{ - store_freebuffer(&ps->new); - ps->writepos = 0; - ps->chunkpos = 8; - ps->chunktype = 0; - ps->chunklen = 16; - ps->IDAT_size = 0; - ps->IDAT_bits = 0; - if (ps->palette != NULL) - { - free(ps->palette); - ps->palette = NULL; - ps->npalette = 0; - } -} - -static void -store_storenew(png_store *ps) -{ - png_store_buffer *pb; - - pb = voidcast(png_store_buffer*, malloc(sizeof *pb)); - - if (pb == NULL) - png_error(ps->pwrite, "store new: OOM"); - - *pb = ps->new; - ps->new.prev = pb; - ps->writepos = 0; -} - -static void -store_freefile(png_store_file **ppf) -{ - if (*ppf != NULL) - { - store_freefile(&(*ppf)->next); - - store_freebuffer(&(*ppf)->data); - (*ppf)->datacount = 0; - if ((*ppf)->palette != NULL) - { - free((*ppf)->palette); - (*ppf)->palette = NULL; - (*ppf)->npalette = 0; - } - free(*ppf); - *ppf = NULL; - } -} - -static unsigned int -bits_of(png_uint_32 num) -{ - /* Return the number of bits in 'num' */ - unsigned int b = 0; - - if (num & 0xffff0000U) b += 16U, num >>= 16; - if (num & 0xff00U) b += 8U, num >>= 8; - if (num & 0xf0U) b += 4U, num >>= 4; - if (num & 0xcU) b += 2U, num >>= 2; - if (num & 0x2U) ++b, num >>= 1; - if (num) ++b; - - return b; /* 0..32 */ -} - -/* Main interface to file storage, after writing a new PNG file (see the API - * below) call store_storefile to store the result with the given name and id. - */ -static void -store_storefile(png_store *ps, png_uint_32 id) -{ - png_store_file *pf; - - if (ps->chunkpos != 0U || ps->chunktype != 0U || ps->chunklen != 0U || - ps->IDAT_size == 0) - png_error(ps->pwrite, "storefile: incomplete write"); - - pf = voidcast(png_store_file*, malloc(sizeof *pf)); - if (pf == NULL) - png_error(ps->pwrite, "storefile: OOM"); - safecat(pf->name, sizeof pf->name, 0, ps->wname); - pf->id = id; - pf->data = ps->new; - pf->datacount = ps->writepos; - pf->IDAT_size = ps->IDAT_size; - pf->IDAT_bits = bits_of(ps->IDAT_size); - /* Because the IDAT always has zlib header stuff this must be true: */ - if (pf->IDAT_bits == 0U) - png_error(ps->pwrite, "storefile: 0 sized IDAT"); - ps->new.prev = NULL; - ps->writepos = 0; - ps->chunkpos = 8; - ps->chunktype = 0; - ps->chunklen = 16; - ps->IDAT_size = 0; - pf->palette = ps->palette; - pf->npalette = ps->npalette; - ps->palette = 0; - ps->npalette = 0; - - /* And save it. */ - pf->next = ps->saved; - ps->saved = pf; -} - -/* Generate an error message (in the given buffer) */ -static size_t -store_message(png_store *ps, png_const_structp pp, char *buffer, size_t bufsize, - size_t pos, const char *msg) -{ - if (pp != NULL && pp == ps->pread) - { - /* Reading a file */ - pos = safecat(buffer, bufsize, pos, "read: "); - - if (ps->current != NULL) - { - pos = safecat(buffer, bufsize, pos, ps->current->name); - pos = safecat(buffer, bufsize, pos, sep); - } - } - - else if (pp != NULL && pp == ps->pwrite) - { - /* Writing a file */ - pos = safecat(buffer, bufsize, pos, "write: "); - pos = safecat(buffer, bufsize, pos, ps->wname); - pos = safecat(buffer, bufsize, pos, sep); - } - - else - { - /* Neither reading nor writing (or a memory error in struct delete) */ - pos = safecat(buffer, bufsize, pos, "pngvalid: "); - } - - if (ps->test[0] != 0) - { - pos = safecat(buffer, bufsize, pos, ps->test); - pos = safecat(buffer, bufsize, pos, sep); - } - pos = safecat(buffer, bufsize, pos, msg); - return pos; -} - -/* Verbose output to the error stream: */ -static void -store_verbose(png_store *ps, png_const_structp pp, png_const_charp prefix, - png_const_charp message) -{ - char buffer[512]; - - if (prefix) - fputs(prefix, stderr); - - (void)store_message(ps, pp, buffer, sizeof buffer, 0, message); - fputs(buffer, stderr); - fputc('\n', stderr); -} - -/* Log an error or warning - the relevant count is always incremented. */ -static void -store_log(png_store* ps, png_const_structp pp, png_const_charp message, - int is_error) -{ - /* The warning is copied to the error buffer if there are no errors and it is - * the first warning. The error is copied to the error buffer if it is the - * first error (overwriting any prior warnings). - */ - if (is_error ? (ps->nerrors)++ == 0 : - (ps->nwarnings)++ == 0 && ps->nerrors == 0) - store_message(ps, pp, ps->error, sizeof ps->error, 0, message); - - if (ps->verbose) - store_verbose(ps, pp, is_error ? "error: " : "warning: ", message); -} - -#ifdef PNG_READ_SUPPORTED -/* Internal error function, called with a png_store but no libpng stuff. */ -static void -internal_error(png_store *ps, png_const_charp message) -{ - store_log(ps, NULL, message, 1 /* error */); - - /* And finally throw an exception. */ - { - struct exception_context *the_exception_context = &ps->exception_context; - Throw ps; - } -} -#endif /* PNG_READ_SUPPORTED */ - -/* Functions to use as PNG callbacks. */ -static void PNGCBAPI -store_error(png_structp ppIn, png_const_charp message) /* PNG_NORETURN */ -{ - png_const_structp pp = ppIn; - png_store *ps = voidcast(png_store*, png_get_error_ptr(pp)); - - if (!ps->expect_error) - store_log(ps, pp, message, 1 /* error */); - - /* And finally throw an exception. */ - { - struct exception_context *the_exception_context = &ps->exception_context; - Throw ps; - } -} - -static void PNGCBAPI -store_warning(png_structp ppIn, png_const_charp message) -{ - png_const_structp pp = ppIn; - png_store *ps = voidcast(png_store*, png_get_error_ptr(pp)); - - if (!ps->expect_warning) - store_log(ps, pp, message, 0 /* warning */); - else - ps->saw_warning = 1; -} - -/* These somewhat odd functions are used when reading an image to ensure that - * the buffer is big enough, the png_structp is for errors. - */ -/* Return a single row from the correct image. */ -static png_bytep -store_image_row(const png_store* ps, png_const_structp pp, int nImage, - png_uint_32 y) -{ - size_t coffset = (nImage * ps->image_h + y) * (ps->cb_row + 5) + 2; - - if (ps->image == NULL) - png_error(pp, "no allocated image"); - - if (coffset + ps->cb_row + 3 > ps->cb_image) - png_error(pp, "image too small"); - - return ps->image + coffset; -} - -static void -store_image_free(png_store *ps, png_const_structp pp) -{ - if (ps->image != NULL) - { - png_bytep image = ps->image; - - if (image[-1] != 0xed || image[ps->cb_image] != 0xfe) - { - if (pp != NULL) - png_error(pp, "png_store image overwrite (1)"); - else - store_log(ps, NULL, "png_store image overwrite (2)", 1); - } - - ps->image = NULL; - ps->cb_image = 0; - --image; - free(image); - } -} - -static void -store_ensure_image(png_store *ps, png_const_structp pp, int nImages, - size_t cbRow, png_uint_32 cRows) -{ - size_t cb = nImages * cRows * (cbRow + 5); - - if (ps->cb_image < cb) - { - png_bytep image; - - store_image_free(ps, pp); - - /* The buffer is deliberately mis-aligned. */ - image = voidcast(png_bytep, malloc(cb+2)); - if (image == NULL) - { - /* Called from the startup - ignore the error for the moment. */ - if (pp == NULL) - return; - - png_error(pp, "OOM allocating image buffer"); - } - - /* These magic tags are used to detect overwrites above. */ - ++image; - image[-1] = 0xed; - image[cb] = 0xfe; - - ps->image = image; - ps->cb_image = cb; - } - - /* We have an adequate sized image; lay out the rows. There are 2 bytes at - * the start and three at the end of each (this ensures that the row - * alignment starts out odd - 2+1 and changes for larger images on each row.) - */ - ps->cb_row = cbRow; - ps->image_h = cRows; - - /* For error checking, the whole buffer is set to 10110010 (0xb2 - 178). - * This deliberately doesn't match the bits in the size test image which are - * outside the image; these are set to 0xff (all 1). To make the row - * comparison work in the 'size' test case the size rows are pre-initialized - * to the same value prior to calling 'standard_row'. - */ - memset(ps->image, 178, cb); - - /* Then put in the marks. */ - while (--nImages >= 0) - { - png_uint_32 y; - - for (y=0; yimage; - - if (image[-1] != 0xed || image[ps->cb_image] != 0xfe) - png_error(pp, "image overwrite"); - else - { - size_t cbRow = ps->cb_row; - png_uint_32 rows = ps->image_h; - - image += iImage * (cbRow+5) * ps->image_h; - - image += 2; /* skip image first row markers */ - - for (; rows > 0; --rows) - { - if (image[-2] != 190 || image[-1] != 239) - png_error(pp, "row start overwritten"); - - if (image[cbRow] != 222 || image[cbRow+1] != 173 || - image[cbRow+2] != 17) - png_error(pp, "row end overwritten"); - - image += cbRow+5; - } - } -} -#endif /* PNG_READ_SUPPORTED */ - -static int -valid_chunktype(png_uint_32 chunktype) -{ - /* Each byte in the chunk type must be in one of the ranges 65..90, 97..122 - * (both inclusive), so: - */ - unsigned int i; - - for (i=0; i<4; ++i) - { - unsigned int c = chunktype & 0xffU; - - if (!((c >= 65U && c <= 90U) || (c >= 97U && c <= 122U))) - return 0; - - chunktype >>= 8; - } - - return 1; /* It's valid */ -} - -static void PNGCBAPI -store_write(png_structp ppIn, png_bytep pb, size_t st) -{ - png_const_structp pp = ppIn; - png_store *ps = voidcast(png_store*, png_get_io_ptr(pp)); - size_t writepos = ps->writepos; - png_uint_32 chunkpos = ps->chunkpos; - png_uint_32 chunktype = ps->chunktype; - png_uint_32 chunklen = ps->chunklen; - - if (ps->pwrite != pp) - png_error(pp, "store state damaged"); - - /* Technically this is legal, but in practice libpng never writes more than - * the maximum chunk size at once so if it happens something weird has - * changed inside libpng (probably). - */ - if (st > 0x7fffffffU) - png_error(pp, "unexpected write size"); - - /* Now process the bytes to be written. Do this in units of the space in the - * output (write) buffer or, at the start 4 bytes for the chunk type and - * length limited in any case by the amount of data. - */ - while (st > 0) - { - if (writepos >= STORE_BUFFER_SIZE) - store_storenew(ps), writepos = 0; - - if (chunkpos < 4) - { - png_byte b = *pb++; - --st; - chunklen = (chunklen << 8) + b; - ps->new.buffer[writepos++] = b; - ++chunkpos; - } - - else if (chunkpos < 8) - { - png_byte b = *pb++; - --st; - chunktype = (chunktype << 8) + b; - ps->new.buffer[writepos++] = b; - - if (++chunkpos == 8) - { - chunklen &= 0xffffffffU; - if (chunklen > 0x7fffffffU) - png_error(pp, "chunk length too great"); - - chunktype &= 0xffffffffU; - if (chunktype == CHUNK_IDAT) - { - if (chunklen > ~ps->IDAT_size) - png_error(pp, "pngvalid internal image too large"); - - ps->IDAT_size += chunklen; - } - - else if (!valid_chunktype(chunktype)) - png_error(pp, "invalid chunk type"); - - chunklen += 12; /* for header and CRC */ - } - } - - else /* chunkpos >= 8 */ - { - size_t cb = st; - - if (cb > STORE_BUFFER_SIZE - writepos) - cb = STORE_BUFFER_SIZE - writepos; - - if (cb > chunklen - chunkpos/* bytes left in chunk*/) - cb = (size_t)/*SAFE*/(chunklen - chunkpos); - - memcpy(ps->new.buffer + writepos, pb, cb); - chunkpos += (png_uint_32)/*SAFE*/cb; - pb += cb; - writepos += cb; - st -= cb; - - if (chunkpos >= chunklen) /* must be equal */ - chunkpos = chunktype = chunklen = 0; - } - } /* while (st > 0) */ - - ps->writepos = writepos; - ps->chunkpos = chunkpos; - ps->chunktype = chunktype; - ps->chunklen = chunklen; -} - -static void PNGCBAPI -store_flush(png_structp ppIn) -{ - UNUSED(ppIn) /*DOES NOTHING*/ -} - -#ifdef PNG_READ_SUPPORTED -static size_t -store_read_buffer_size(png_store *ps) -{ - /* Return the bytes available for read in the current buffer. */ - if (ps->next != &ps->current->data) - return STORE_BUFFER_SIZE; - - return ps->current->datacount; -} - -/* Return total bytes available for read. */ -static size_t -store_read_buffer_avail(png_store *ps) -{ - if (ps->current != NULL && ps->next != NULL) - { - png_store_buffer *next = &ps->current->data; - size_t cbAvail = ps->current->datacount; - - while (next != ps->next && next != NULL) - { - next = next->prev; - cbAvail += STORE_BUFFER_SIZE; - } - - if (next != ps->next) - png_error(ps->pread, "buffer read error"); - - if (cbAvail > ps->readpos) - return cbAvail - ps->readpos; - } - - return 0; -} - -static int -store_read_buffer_next(png_store *ps) -{ - png_store_buffer *pbOld = ps->next; - png_store_buffer *pbNew = &ps->current->data; - if (pbOld != pbNew) - { - while (pbNew != NULL && pbNew->prev != pbOld) - pbNew = pbNew->prev; - - if (pbNew != NULL) - { - ps->next = pbNew; - ps->readpos = 0; - return 1; - } - - png_error(ps->pread, "buffer lost"); - } - - return 0; /* EOF or error */ -} - -/* Need separate implementation and callback to allow use of the same code - * during progressive read, where the io_ptr is set internally by libpng. - */ -static void -store_read_imp(png_store *ps, png_bytep pb, size_t st) -{ - if (ps->current == NULL || ps->next == NULL) - png_error(ps->pread, "store state damaged"); - - while (st > 0) - { - size_t cbAvail = store_read_buffer_size(ps) - ps->readpos; - - if (cbAvail > 0) - { - if (cbAvail > st) cbAvail = st; - memcpy(pb, ps->next->buffer + ps->readpos, cbAvail); - st -= cbAvail; - pb += cbAvail; - ps->readpos += cbAvail; - } - - else if (!store_read_buffer_next(ps)) - png_error(ps->pread, "read beyond end of file"); - } -} - -static size_t -store_read_chunk(png_store *ps, png_bytep pb, size_t max, size_t min) -{ - png_uint_32 chunklen = ps->chunklen; - png_uint_32 chunktype = ps->chunktype; - png_uint_32 chunkpos = ps->chunkpos; - size_t st = max; - - if (st > 0) do - { - if (chunkpos >= chunklen) /* end of last chunk */ - { - png_byte buffer[8]; - - /* Read the header of the next chunk: */ - store_read_imp(ps, buffer, 8U); - chunklen = png_get_uint_32(buffer) + 12U; - chunktype = png_get_uint_32(buffer+4U); - chunkpos = 0U; /* Position read so far */ - } - - if (chunktype == CHUNK_IDAT) - { - png_uint_32 IDAT_pos = ps->IDAT_pos; - png_uint_32 IDAT_len = ps->IDAT_len; - png_uint_32 IDAT_size = ps->IDAT_size; - - /* The IDAT headers are constructed here; skip the input header. */ - if (chunkpos < 8U) - chunkpos = 8U; - - if (IDAT_pos == IDAT_len) - { - png_byte random = random_byte(); - - /* Make a new IDAT chunk, if IDAT_len is 0 this is the first IDAT, - * if IDAT_size is 0 this is the end. At present this is set up - * using a random number so that there is a 25% chance before - * the start of the first IDAT chunk being 0 length. - */ - if (IDAT_len == 0U) /* First IDAT */ - { - switch (random & 3U) - { - case 0U: IDAT_len = 12U; break; /* 0 bytes */ - case 1U: IDAT_len = 13U; break; /* 1 byte */ - default: IDAT_len = random_u32(); - IDAT_len %= IDAT_size; - IDAT_len += 13U; /* 1..IDAT_size bytes */ - break; - } - } - - else if (IDAT_size == 0U) /* all IDAT data read */ - { - /* The last (IDAT) chunk should be positioned at the CRC now: */ - if (chunkpos != chunklen-4U) - png_error(ps->pread, "internal: IDAT size mismatch"); - - /* The only option here is to add a zero length IDAT, this - * happens 25% of the time. Because of the check above - * chunklen-4U-chunkpos must be zero, we just need to skip the - * CRC now. - */ - if ((random & 3U) == 0U) - IDAT_len = 12U; /* Output another 0 length IDAT */ - - else - { - /* End of IDATs, skip the CRC to make the code above load the - * next chunk header next time round. - */ - png_byte buffer[4]; - - store_read_imp(ps, buffer, 4U); - chunkpos += 4U; - ps->IDAT_pos = IDAT_pos; - ps->IDAT_len = IDAT_len; - ps->IDAT_size = 0U; - continue; /* Read the next chunk */ - } - } - - else - { - /* Middle of IDATs, use 'random' to determine the number of bits - * to use in the IDAT length. - */ - IDAT_len = random_u32(); - IDAT_len &= (1U << (1U + random % ps->IDAT_bits)) - 1U; - if (IDAT_len > IDAT_size) - IDAT_len = IDAT_size; - IDAT_len += 12U; /* zero bytes may occur */ - } - - IDAT_pos = 0U; - ps->IDAT_crc = 0x35af061e; /* Ie: crc32(0UL, "IDAT", 4) */ - } /* IDAT_pos == IDAT_len */ - - if (IDAT_pos < 8U) /* Return the header */ do - { - png_uint_32 b; - unsigned int shift; - - if (IDAT_pos < 4U) - b = IDAT_len - 12U; - - else - b = CHUNK_IDAT; - - shift = 3U & IDAT_pos; - ++IDAT_pos; - - if (shift < 3U) - b >>= 8U*(3U-shift); - - *pb++ = 0xffU & b; - } - while (--st > 0 && IDAT_pos < 8); - - else if (IDAT_pos < IDAT_len - 4U) /* I.e not the CRC */ - { - if (chunkpos < chunklen-4U) - { - uInt avail = (uInt)-1; - - if (avail > (IDAT_len-4U) - IDAT_pos) - avail = (uInt)/*SAFE*/((IDAT_len-4U) - IDAT_pos); - - if (avail > st) - avail = (uInt)/*SAFE*/st; - - if (avail > (chunklen-4U) - chunkpos) - avail = (uInt)/*SAFE*/((chunklen-4U) - chunkpos); - - store_read_imp(ps, pb, avail); - ps->IDAT_crc = crc32(ps->IDAT_crc, pb, avail); - pb += (size_t)/*SAFE*/avail; - st -= (size_t)/*SAFE*/avail; - chunkpos += (png_uint_32)/*SAFE*/avail; - IDAT_size -= (png_uint_32)/*SAFE*/avail; - IDAT_pos += (png_uint_32)/*SAFE*/avail; - } - - else /* skip the input CRC */ - { - png_byte buffer[4]; - - store_read_imp(ps, buffer, 4U); - chunkpos += 4U; - } - } - - else /* IDAT crc */ do - { - uLong b = ps->IDAT_crc; - unsigned int shift = (IDAT_len - IDAT_pos); /* 4..1 */ - ++IDAT_pos; - - if (shift > 1U) - b >>= 8U*(shift-1U); - - *pb++ = 0xffU & b; - } - while (--st > 0 && IDAT_pos < IDAT_len); - - ps->IDAT_pos = IDAT_pos; - ps->IDAT_len = IDAT_len; - ps->IDAT_size = IDAT_size; - } - - else /* !IDAT */ - { - /* If there is still some pending IDAT data after the IDAT chunks have - * been processed there is a problem: - */ - if (ps->IDAT_len > 0 && ps->IDAT_size > 0) - png_error(ps->pread, "internal: missing IDAT data"); - - if (chunktype == CHUNK_IEND && ps->IDAT_len == 0U) - png_error(ps->pread, "internal: missing IDAT"); - - if (chunkpos < 8U) /* Return the header */ do - { - png_uint_32 b; - unsigned int shift; - - if (chunkpos < 4U) - b = chunklen - 12U; - - else - b = chunktype; - - shift = 3U & chunkpos; - ++chunkpos; - - if (shift < 3U) - b >>= 8U*(3U-shift); - - *pb++ = 0xffU & b; - } - while (--st > 0 && chunkpos < 8); - - else /* Return chunk bytes, including the CRC */ - { - size_t avail = st; - - if (avail > chunklen - chunkpos) - avail = (size_t)/*SAFE*/(chunklen - chunkpos); - - store_read_imp(ps, pb, avail); - pb += avail; - st -= avail; - chunkpos += (png_uint_32)/*SAFE*/avail; - - /* Check for end of chunk and end-of-file; don't try to read a new - * chunk header at this point unless instructed to do so by 'min'. - */ - if (chunkpos >= chunklen && max-st >= min && - store_read_buffer_avail(ps) == 0) - break; - } - } /* !IDAT */ - } - while (st > 0); - - ps->chunklen = chunklen; - ps->chunktype = chunktype; - ps->chunkpos = chunkpos; - - return st; /* space left */ -} - -static void PNGCBAPI -store_read(png_structp ppIn, png_bytep pb, size_t st) -{ - png_const_structp pp = ppIn; - png_store *ps = voidcast(png_store*, png_get_io_ptr(pp)); - - if (ps == NULL || ps->pread != pp) - png_error(pp, "bad store read call"); - - store_read_chunk(ps, pb, st, st); -} - -static void -store_progressive_read(png_store *ps, png_structp pp, png_infop pi) -{ - if (ps->pread != pp || ps->current == NULL || ps->next == NULL) - png_error(pp, "store state damaged (progressive)"); - - /* This is another Horowitz and Hill random noise generator. In this case - * the aim is to stress the progressive reader with truly horrible variable - * buffer sizes in the range 1..500, so a sequence of 9 bit random numbers - * is generated. We could probably just count from 1 to 32767 and get as - * good a result. - */ - while (store_read_buffer_avail(ps) > 0) - { - static png_uint_32 noise = 2; - size_t cb; - png_byte buffer[512]; - - /* Generate 15 more bits of stuff: */ - noise = (noise << 9) | ((noise ^ (noise >> (9-5))) & 0x1ff); - cb = noise & 0x1ff; - cb -= store_read_chunk(ps, buffer, cb, 1); - png_process_data(pp, pi, buffer, cb); - } -} -#endif /* PNG_READ_SUPPORTED */ - -/* The caller must fill this in: */ -static store_palette_entry * -store_write_palette(png_store *ps, int npalette) -{ - if (ps->pwrite == NULL) - store_log(ps, NULL, "attempt to write palette without write stream", 1); - - if (ps->palette != NULL) - png_error(ps->pwrite, "multiple store_write_palette calls"); - - /* This function can only return NULL if called with '0'! */ - if (npalette > 0) - { - ps->palette = voidcast(store_palette_entry*, malloc(npalette * - sizeof *ps->palette)); - - if (ps->palette == NULL) - png_error(ps->pwrite, "store new palette: OOM"); - - ps->npalette = npalette; - } - - return ps->palette; -} - -#ifdef PNG_READ_SUPPORTED -static store_palette_entry * -store_current_palette(png_store *ps, int *npalette) -{ - /* This is an internal error (the call has been made outside a read - * operation.) - */ - if (ps->current == NULL) - { - store_log(ps, ps->pread, "no current stream for palette", 1); - return NULL; - } - - /* The result may be null if there is no palette. */ - *npalette = ps->current->npalette; - return ps->current->palette; -} -#endif /* PNG_READ_SUPPORTED */ - -/***************************** MEMORY MANAGEMENT*** ***************************/ -#ifdef PNG_USER_MEM_SUPPORTED -/* A store_memory is simply the header for an allocated block of memory. The - * pointer returned to libpng is just after the end of the header block, the - * allocated memory is followed by a second copy of the 'mark'. - */ -typedef struct store_memory -{ - store_pool *pool; /* Originating pool */ - struct store_memory *next; /* Singly linked list */ - png_alloc_size_t size; /* Size of memory allocated */ - png_byte mark[4]; /* ID marker */ -} store_memory; - -/* Handle a fatal error in memory allocation. This calls png_error if the - * libpng struct is non-NULL, else it outputs a message and returns. This means - * that a memory problem while libpng is running will abort (png_error) the - * handling of particular file while one in cleanup (after the destroy of the - * struct has returned) will simply keep going and free (or attempt to free) - * all the memory. - */ -static void -store_pool_error(png_store *ps, png_const_structp pp, const char *msg) -{ - if (pp != NULL) - png_error(pp, msg); - - /* Else we have to do it ourselves. png_error eventually calls store_log, - * above. store_log accepts a NULL png_structp - it just changes what gets - * output by store_message. - */ - store_log(ps, pp, msg, 1 /* error */); -} - -static void -store_memory_free(png_const_structp pp, store_pool *pool, store_memory *memory) -{ - /* Note that pp may be NULL (see store_pool_delete below), the caller has - * found 'memory' in pool->list *and* unlinked this entry, so this is a valid - * pointer (for sure), but the contents may have been trashed. - */ - if (memory->pool != pool) - store_pool_error(pool->store, pp, "memory corrupted (pool)"); - - else if (memcmp(memory->mark, pool->mark, sizeof memory->mark) != 0) - store_pool_error(pool->store, pp, "memory corrupted (start)"); - - /* It should be safe to read the size field now. */ - else - { - png_alloc_size_t cb = memory->size; - - if (cb > pool->max) - store_pool_error(pool->store, pp, "memory corrupted (size)"); - - else if (memcmp((png_bytep)(memory+1)+cb, pool->mark, sizeof pool->mark) - != 0) - store_pool_error(pool->store, pp, "memory corrupted (end)"); - - /* Finally give the library a chance to find problems too: */ - else - { - pool->current -= cb; - free(memory); - } - } -} - -static void -store_pool_delete(png_store *ps, store_pool *pool) -{ - if (pool->list != NULL) - { - fprintf(stderr, "%s: %s %s: memory lost (list follows):\n", ps->test, - pool == &ps->read_memory_pool ? "read" : "write", - pool == &ps->read_memory_pool ? (ps->current != NULL ? - ps->current->name : "unknown file") : ps->wname); - ++ps->nerrors; - - do - { - store_memory *next = pool->list; - pool->list = next->next; - next->next = NULL; - - fprintf(stderr, "\t%lu bytes @ %p\n", - (unsigned long)next->size, (const void*)(next+1)); - /* The NULL means this will always return, even if the memory is - * corrupted. - */ - store_memory_free(NULL, pool, next); - } - while (pool->list != NULL); - } - - /* And reset the other fields too for the next time. */ - if (pool->max > pool->max_max) pool->max_max = pool->max; - pool->max = 0; - if (pool->current != 0) /* unexpected internal error */ - fprintf(stderr, "%s: %s %s: memory counter mismatch (internal error)\n", - ps->test, pool == &ps->read_memory_pool ? "read" : "write", - pool == &ps->read_memory_pool ? (ps->current != NULL ? - ps->current->name : "unknown file") : ps->wname); - pool->current = 0; - - if (pool->limit > pool->max_limit) - pool->max_limit = pool->limit; - - pool->limit = 0; - - if (pool->total > pool->max_total) - pool->max_total = pool->total; - - pool->total = 0; - - /* Get a new mark too. */ - store_pool_mark(pool->mark); -} - -/* The memory callbacks: */ -static png_voidp PNGCBAPI -store_malloc(png_structp ppIn, png_alloc_size_t cb) -{ - png_const_structp pp = ppIn; - store_pool *pool = voidcast(store_pool*, png_get_mem_ptr(pp)); - store_memory *new = voidcast(store_memory*, malloc(cb + (sizeof *new) + - (sizeof pool->mark))); - - if (new != NULL) - { - if (cb > pool->max) - pool->max = cb; - - pool->current += cb; - - if (pool->current > pool->limit) - pool->limit = pool->current; - - pool->total += cb; - - new->size = cb; - memcpy(new->mark, pool->mark, sizeof new->mark); - memcpy((png_byte*)(new+1) + cb, pool->mark, sizeof pool->mark); - new->pool = pool; - new->next = pool->list; - pool->list = new; - ++new; - } - - else - { - /* NOTE: the PNG user malloc function cannot use the png_ptr it is passed - * other than to retrieve the allocation pointer! libpng calls the - * store_malloc callback in two basic cases: - * - * 1) From png_malloc; png_malloc will do a png_error itself if NULL is - * returned. - * 2) From png_struct or png_info structure creation; png_malloc is - * to return so cleanup can be performed. - * - * To handle this store_malloc can log a message, but can't do anything - * else. - */ - store_log(pool->store, pp, "out of memory", 1 /* is_error */); - } - - return new; -} - -static void PNGCBAPI -store_free(png_structp ppIn, png_voidp memory) -{ - png_const_structp pp = ppIn; - store_pool *pool = voidcast(store_pool*, png_get_mem_ptr(pp)); - store_memory *this = voidcast(store_memory*, memory), **test; - - /* Because libpng calls store_free with a dummy png_struct when deleting - * png_struct or png_info via png_destroy_struct_2 it is necessary to check - * the passed in png_structp to ensure it is valid, and not pass it to - * png_error if it is not. - */ - if (pp != pool->store->pread && pp != pool->store->pwrite) - pp = NULL; - - /* First check that this 'memory' really is valid memory - it must be in the - * pool list. If it is, use the shared memory_free function to free it. - */ - --this; - for (test = &pool->list; *test != this; test = &(*test)->next) - { - if (*test == NULL) - { - store_pool_error(pool->store, pp, "bad pointer to free"); - return; - } - } - - /* Unlink this entry, *test == this. */ - *test = this->next; - this->next = NULL; - store_memory_free(pp, pool, this); -} -#endif /* PNG_USER_MEM_SUPPORTED */ - -/* Setup functions. */ -/* Cleanup when aborting a write or after storing the new file. */ -static void -store_write_reset(png_store *ps) -{ - if (ps->pwrite != NULL) - { - anon_context(ps); - - Try - png_destroy_write_struct(&ps->pwrite, &ps->piwrite); - - Catch_anonymous - { - /* memory corruption: continue. */ - } - - ps->pwrite = NULL; - ps->piwrite = NULL; - } - - /* And make sure that all the memory has been freed - this will output - * spurious errors in the case of memory corruption above, but this is safe. - */ -# ifdef PNG_USER_MEM_SUPPORTED - store_pool_delete(ps, &ps->write_memory_pool); -# endif - - store_freenew(ps); -} - -/* The following is the main write function, it returns a png_struct and, - * optionally, a png_info suitable for writiing a new PNG file. Use - * store_storefile above to record this file after it has been written. The - * returned libpng structures as destroyed by store_write_reset above. - */ -static png_structp -set_store_for_write(png_store *ps, png_infopp ppi, const char *name) -{ - anon_context(ps); - - Try - { - if (ps->pwrite != NULL) - png_error(ps->pwrite, "write store already in use"); - - store_write_reset(ps); - safecat(ps->wname, sizeof ps->wname, 0, name); - - /* Don't do the slow memory checks if doing a speed test, also if user - * memory is not supported we can't do it anyway. - */ -# ifdef PNG_USER_MEM_SUPPORTED - if (!ps->speed) - ps->pwrite = png_create_write_struct_2(PNG_LIBPNG_VER_STRING, - ps, store_error, store_warning, &ps->write_memory_pool, - store_malloc, store_free); - - else -# endif - ps->pwrite = png_create_write_struct(PNG_LIBPNG_VER_STRING, - ps, store_error, store_warning); - - png_set_write_fn(ps->pwrite, ps, store_write, store_flush); - -# ifdef PNG_SET_OPTION_SUPPORTED - { - int opt; - for (opt=0; optnoptions; ++opt) - if (png_set_option(ps->pwrite, ps->options[opt].option, - ps->options[opt].setting) == PNG_OPTION_INVALID) - png_error(ps->pwrite, "png option invalid"); - } -# endif - - if (ppi != NULL) - *ppi = ps->piwrite = png_create_info_struct(ps->pwrite); - } - - Catch_anonymous - return NULL; - - return ps->pwrite; -} - -/* Cleanup when finished reading (either due to error or in the success case). - * This routine exists even when there is no read support to make the code - * tidier (avoid a mass of ifdefs) and so easier to maintain. - */ -static void -store_read_reset(png_store *ps) -{ -# ifdef PNG_READ_SUPPORTED - if (ps->pread != NULL) - { - anon_context(ps); - - Try - png_destroy_read_struct(&ps->pread, &ps->piread, NULL); - - Catch_anonymous - { - /* error already output: continue */ - } - - ps->pread = NULL; - ps->piread = NULL; - } -# endif - -# ifdef PNG_USER_MEM_SUPPORTED - /* Always do this to be safe. */ - store_pool_delete(ps, &ps->read_memory_pool); -# endif - - ps->current = NULL; - ps->next = NULL; - ps->readpos = 0; - ps->validated = 0; - - ps->chunkpos = 8; - ps->chunktype = 0; - ps->chunklen = 16; - ps->IDAT_size = 0; -} - -#ifdef PNG_READ_SUPPORTED -static void -store_read_set(png_store *ps, png_uint_32 id) -{ - png_store_file *pf = ps->saved; - - while (pf != NULL) - { - if (pf->id == id) - { - ps->current = pf; - ps->next = NULL; - ps->IDAT_size = pf->IDAT_size; - ps->IDAT_bits = pf->IDAT_bits; /* just a cache */ - ps->IDAT_len = 0; - ps->IDAT_pos = 0; - ps->IDAT_crc = 0UL; - store_read_buffer_next(ps); - return; - } - - pf = pf->next; - } - - { - size_t pos; - char msg[FILE_NAME_SIZE+64]; - - pos = standard_name_from_id(msg, sizeof msg, 0, id); - pos = safecat(msg, sizeof msg, pos, ": file not found"); - png_error(ps->pread, msg); - } -} - -/* The main interface for reading a saved file - pass the id number of the file - * to retrieve. Ids must be unique or the earlier file will be hidden. The API - * returns a png_struct and, optionally, a png_info. Both of these will be - * destroyed by store_read_reset above. - */ -static png_structp -set_store_for_read(png_store *ps, png_infopp ppi, png_uint_32 id, - const char *name) -{ - /* Set the name for png_error */ - safecat(ps->test, sizeof ps->test, 0, name); - - if (ps->pread != NULL) - png_error(ps->pread, "read store already in use"); - - store_read_reset(ps); - - /* Both the create APIs can return NULL if used in their default mode - * (because there is no other way of handling an error because the jmp_buf - * by default is stored in png_struct and that has not been allocated!) - * However, given that store_error works correctly in these circumstances - * we don't ever expect NULL in this program. - */ -# ifdef PNG_USER_MEM_SUPPORTED - if (!ps->speed) - ps->pread = png_create_read_struct_2(PNG_LIBPNG_VER_STRING, ps, - store_error, store_warning, &ps->read_memory_pool, store_malloc, - store_free); - - else -# endif - ps->pread = png_create_read_struct(PNG_LIBPNG_VER_STRING, ps, store_error, - store_warning); - - if (ps->pread == NULL) - { - struct exception_context *the_exception_context = &ps->exception_context; - - store_log(ps, NULL, "png_create_read_struct returned NULL (unexpected)", - 1 /*error*/); - - Throw ps; - } - -# ifdef PNG_SET_OPTION_SUPPORTED - { - int opt; - for (opt=0; optnoptions; ++opt) - if (png_set_option(ps->pread, ps->options[opt].option, - ps->options[opt].setting) == PNG_OPTION_INVALID) - png_error(ps->pread, "png option invalid"); - } -# endif - - store_read_set(ps, id); - - if (ppi != NULL) - *ppi = ps->piread = png_create_info_struct(ps->pread); - - return ps->pread; -} -#endif /* PNG_READ_SUPPORTED */ - -/* The overall cleanup of a store simply calls the above then removes all the - * saved files. This does not delete the store itself. - */ -static void -store_delete(png_store *ps) -{ - store_write_reset(ps); - store_read_reset(ps); - store_freefile(&ps->saved); - store_image_free(ps, NULL); -} - -/*********************** PNG FILE MODIFICATION ON READ ************************/ -/* Files may be modified on read. The following structure contains a complete - * png_store together with extra members to handle modification and a special - * read callback for libpng. To use this the 'modifications' field must be set - * to a list of png_modification structures that actually perform the - * modification, otherwise a png_modifier is functionally equivalent to a - * png_store. There is a special read function, set_modifier_for_read, which - * replaces set_store_for_read. - */ -typedef enum modifier_state -{ - modifier_start, /* Initial value */ - modifier_signature, /* Have a signature */ - modifier_IHDR /* Have an IHDR */ -} modifier_state; - -typedef struct CIE_color -{ - /* A single CIE tristimulus value, representing the unique response of a - * standard observer to a variety of light spectra. The observer recognizes - * all spectra that produce this response as the same color, therefore this - * is effectively a description of a color. - */ - double X, Y, Z; -} CIE_color; - -typedef struct color_encoding -{ - /* A description of an (R,G,B) encoding of color (as defined above); this - * includes the actual colors of the (R,G,B) triples (1,0,0), (0,1,0) and - * (0,0,1) plus an encoding value that is used to encode the linear - * components R, G and B to give the actual values R^gamma, G^gamma and - * B^gamma that are stored. - */ - double gamma; /* Encoding (file) gamma of space */ - CIE_color red, green, blue; /* End points */ -} color_encoding; - -#ifdef PNG_READ_SUPPORTED -#if defined PNG_READ_TRANSFORMS_SUPPORTED && defined PNG_READ_cHRM_SUPPORTED -static double -chromaticity_x(CIE_color c) -{ - return c.X / (c.X + c.Y + c.Z); -} - -static double -chromaticity_y(CIE_color c) -{ - return c.Y / (c.X + c.Y + c.Z); -} - -static CIE_color -white_point(const color_encoding *encoding) -{ - CIE_color white; - - white.X = encoding->red.X + encoding->green.X + encoding->blue.X; - white.Y = encoding->red.Y + encoding->green.Y + encoding->blue.Y; - white.Z = encoding->red.Z + encoding->green.Z + encoding->blue.Z; - - return white; -} -#endif /* READ_TRANSFORMS && READ_cHRM */ - -#ifdef PNG_READ_RGB_TO_GRAY_SUPPORTED -static void -normalize_color_encoding(color_encoding *encoding) -{ - const double whiteY = encoding->red.Y + encoding->green.Y + - encoding->blue.Y; - - if (whiteY != 1) - { - encoding->red.X /= whiteY; - encoding->red.Y /= whiteY; - encoding->red.Z /= whiteY; - encoding->green.X /= whiteY; - encoding->green.Y /= whiteY; - encoding->green.Z /= whiteY; - encoding->blue.X /= whiteY; - encoding->blue.Y /= whiteY; - encoding->blue.Z /= whiteY; - } -} -#endif - -#ifdef PNG_READ_TRANSFORMS_SUPPORTED -static size_t -safecat_color_encoding(char *buffer, size_t bufsize, size_t pos, - const color_encoding *e, double encoding_gamma) -{ - if (e != 0) - { - if (encoding_gamma != 0) - pos = safecat(buffer, bufsize, pos, "("); - pos = safecat(buffer, bufsize, pos, "R("); - pos = safecatd(buffer, bufsize, pos, e->red.X, 4); - pos = safecat(buffer, bufsize, pos, ","); - pos = safecatd(buffer, bufsize, pos, e->red.Y, 4); - pos = safecat(buffer, bufsize, pos, ","); - pos = safecatd(buffer, bufsize, pos, e->red.Z, 4); - pos = safecat(buffer, bufsize, pos, "),G("); - pos = safecatd(buffer, bufsize, pos, e->green.X, 4); - pos = safecat(buffer, bufsize, pos, ","); - pos = safecatd(buffer, bufsize, pos, e->green.Y, 4); - pos = safecat(buffer, bufsize, pos, ","); - pos = safecatd(buffer, bufsize, pos, e->green.Z, 4); - pos = safecat(buffer, bufsize, pos, "),B("); - pos = safecatd(buffer, bufsize, pos, e->blue.X, 4); - pos = safecat(buffer, bufsize, pos, ","); - pos = safecatd(buffer, bufsize, pos, e->blue.Y, 4); - pos = safecat(buffer, bufsize, pos, ","); - pos = safecatd(buffer, bufsize, pos, e->blue.Z, 4); - pos = safecat(buffer, bufsize, pos, ")"); - if (encoding_gamma != 0) - pos = safecat(buffer, bufsize, pos, ")"); - } - - if (encoding_gamma != 0) - { - pos = safecat(buffer, bufsize, pos, "^"); - pos = safecatd(buffer, bufsize, pos, encoding_gamma, 5); - } - - return pos; -} -#endif /* READ_TRANSFORMS */ -#endif /* PNG_READ_SUPPORTED */ - -typedef struct png_modifier -{ - png_store this; /* I am a png_store */ - struct png_modification *modifications; /* Changes to make */ - - modifier_state state; /* My state */ - - /* Information from IHDR: */ - png_byte bit_depth; /* From IHDR */ - png_byte colour_type; /* From IHDR */ - - /* While handling PLTE, IDAT and IEND these chunks may be pended to allow - * other chunks to be inserted. - */ - png_uint_32 pending_len; - png_uint_32 pending_chunk; - - /* Test values */ - double *gammas; - unsigned int ngammas; - unsigned int ngamma_tests; /* Number of gamma tests to run*/ - double current_gamma; /* 0 if not set */ - const color_encoding *encodings; - unsigned int nencodings; - const color_encoding *current_encoding; /* If an encoding has been set */ - unsigned int encoding_counter; /* For iteration */ - int encoding_ignored; /* Something overwrote it */ - - /* Control variables used to iterate through possible encodings, the - * following must be set to 0 and tested by the function that uses the - * png_modifier because the modifier only sets it to 1 (true.) - */ - unsigned int repeat :1; /* Repeat this transform test. */ - unsigned int test_uses_encoding :1; - - /* Lowest sbit to test (pre-1.7 libpng fails for sbit < 8) */ - png_byte sbitlow; - - /* Error control - these are the limits on errors accepted by the gamma tests - * below. - */ - double maxout8; /* Maximum output value error */ - double maxabs8; /* Absolute sample error 0..1 */ - double maxcalc8; /* Absolute sample error 0..1 */ - double maxpc8; /* Percentage sample error 0..100% */ - double maxout16; /* Maximum output value error */ - double maxabs16; /* Absolute sample error 0..1 */ - double maxcalc16;/* Absolute sample error 0..1 */ - double maxcalcG; /* Absolute sample error 0..1 */ - double maxpc16; /* Percentage sample error 0..100% */ - - /* This is set by transforms that need to allow a higher limit, it is an - * internal check on pngvalid to ensure that the calculated error limits are - * not ridiculous; without this it is too easy to make a mistake in pngvalid - * that allows any value through. - * - * NOTE: this is not checked in release builds. - */ - double limit; /* limit on error values, normally 4E-3 */ - - /* Log limits - values above this are logged, but not necessarily - * warned. - */ - double log8; /* Absolute error in 8 bits to log */ - double log16; /* Absolute error in 16 bits to log */ - - /* Logged 8 and 16 bit errors ('output' values): */ - double error_gray_2; - double error_gray_4; - double error_gray_8; - double error_gray_16; - double error_color_8; - double error_color_16; - double error_indexed; - - /* Flags: */ - /* Whether to call png_read_update_info, not png_read_start_image, and how - * many times to call it. - */ - int use_update_info; - - /* Whether or not to interlace. */ - int interlace_type :9; /* int, but must store '1' */ - - /* Run the standard tests? */ - unsigned int test_standard :1; - - /* Run the odd-sized image and interlace read/write tests? */ - unsigned int test_size :1; - - /* Run tests on reading with a combination of transforms, */ - unsigned int test_transform :1; - unsigned int test_tRNS :1; /* Includes tRNS images */ - - /* When to use the use_input_precision option, this controls the gamma - * validation code checks. If set any value that is within the transformed - * range input-.5 to input+.5 will be accepted, otherwise the value must be - * within the normal limits. It should not be necessary to set this; the - * result should always be exact within the permitted error limits. - */ - unsigned int use_input_precision :1; - unsigned int use_input_precision_sbit :1; - unsigned int use_input_precision_16to8 :1; - - /* If set assume that the calculation bit depth is set by the input - * precision, not the output precision. - */ - unsigned int calculations_use_input_precision :1; - - /* If set assume that the calculations are done in 16 bits even if the sample - * depth is 8 bits. - */ - unsigned int assume_16_bit_calculations :1; - - /* Which gamma tests to run: */ - unsigned int test_gamma_threshold :1; - unsigned int test_gamma_transform :1; /* main tests */ - unsigned int test_gamma_sbit :1; - unsigned int test_gamma_scale16 :1; - unsigned int test_gamma_background :1; - unsigned int test_gamma_alpha_mode :1; - unsigned int test_gamma_expand16 :1; - unsigned int test_exhaustive :1; - - /* Whether or not to run the low-bit-depth grayscale tests. This fails on - * gamma images in some cases because of gross inaccuracies in the grayscale - * gamma handling for low bit depth. - */ - unsigned int test_lbg :1; - unsigned int test_lbg_gamma_threshold :1; - unsigned int test_lbg_gamma_transform :1; - unsigned int test_lbg_gamma_sbit :1; - unsigned int test_lbg_gamma_composition :1; - - unsigned int log :1; /* Log max error */ - - /* Buffer information, the buffer size limits the size of the chunks that can - * be modified - they must fit (including header and CRC) into the buffer! - */ - size_t flush; /* Count of bytes to flush */ - size_t buffer_count; /* Bytes in buffer */ - size_t buffer_position; /* Position in buffer */ - png_byte buffer[1024]; -} png_modifier; - -/* This returns true if the test should be stopped now because it has already - * failed and it is running silently. - */ -static int fail(png_modifier *pm) -{ - return !pm->log && !pm->this.verbose && (pm->this.nerrors > 0 || - (pm->this.treat_warnings_as_errors && pm->this.nwarnings > 0)); -} - -static void -modifier_init(png_modifier *pm) -{ - memset(pm, 0, sizeof *pm); - store_init(&pm->this); - pm->modifications = NULL; - pm->state = modifier_start; - pm->sbitlow = 1U; - pm->ngammas = 0; - pm->ngamma_tests = 0; - pm->gammas = 0; - pm->current_gamma = 0; - pm->encodings = 0; - pm->nencodings = 0; - pm->current_encoding = 0; - pm->encoding_counter = 0; - pm->encoding_ignored = 0; - pm->repeat = 0; - pm->test_uses_encoding = 0; - pm->maxout8 = pm->maxpc8 = pm->maxabs8 = pm->maxcalc8 = 0; - pm->maxout16 = pm->maxpc16 = pm->maxabs16 = pm->maxcalc16 = 0; - pm->maxcalcG = 0; - pm->limit = 4E-3; - pm->log8 = pm->log16 = 0; /* Means 'off' */ - pm->error_gray_2 = pm->error_gray_4 = pm->error_gray_8 = 0; - pm->error_gray_16 = pm->error_color_8 = pm->error_color_16 = 0; - pm->error_indexed = 0; - pm->use_update_info = 0; - pm->interlace_type = PNG_INTERLACE_NONE; - pm->test_standard = 0; - pm->test_size = 0; - pm->test_transform = 0; -# ifdef PNG_WRITE_tRNS_SUPPORTED - pm->test_tRNS = 1; -# else - pm->test_tRNS = 0; -# endif - pm->use_input_precision = 0; - pm->use_input_precision_sbit = 0; - pm->use_input_precision_16to8 = 0; - pm->calculations_use_input_precision = 0; - pm->assume_16_bit_calculations = 0; - pm->test_gamma_threshold = 0; - pm->test_gamma_transform = 0; - pm->test_gamma_sbit = 0; - pm->test_gamma_scale16 = 0; - pm->test_gamma_background = 0; - pm->test_gamma_alpha_mode = 0; - pm->test_gamma_expand16 = 0; - pm->test_lbg = 1; - pm->test_lbg_gamma_threshold = 1; - pm->test_lbg_gamma_transform = 1; - pm->test_lbg_gamma_sbit = 1; - pm->test_lbg_gamma_composition = 1; - pm->test_exhaustive = 0; - pm->log = 0; - - /* Rely on the memset for all the other fields - there are no pointers */ -} - -#ifdef PNG_READ_TRANSFORMS_SUPPORTED - -/* This controls use of checks that explicitly know how libpng digitizes the - * samples in calculations; setting this circumvents simple error limit checking - * in the rgb_to_gray check, replacing it with an exact copy of the libpng 1.5 - * algorithm. - */ -#define DIGITIZE PNG_LIBPNG_VER < 10700 - -/* If pm->calculations_use_input_precision is set then operations will happen - * with the precision of the input, not the precision of the output depth. - * - * If pm->assume_16_bit_calculations is set then even 8 bit calculations use 16 - * bit precision. This only affects those of the following limits that pertain - * to a calculation - not a digitization operation - unless the following API is - * called directly. - */ -#ifdef PNG_READ_RGB_TO_GRAY_SUPPORTED -#if DIGITIZE -static double digitize(double value, int depth, int do_round) -{ - /* 'value' is in the range 0 to 1, the result is the same value rounded to a - * multiple of the digitization factor - 8 or 16 bits depending on both the - * sample depth and the 'assume' setting. Digitization is normally by - * rounding and 'do_round' should be 1, if it is 0 the digitized value will - * be truncated. - */ - unsigned int digitization_factor = (1U << depth) - 1; - - /* Limiting the range is done as a convenience to the caller - it's easier to - * do it once here than every time at the call site. - */ - if (value <= 0) - value = 0; - - else if (value >= 1) - value = 1; - - value *= digitization_factor; - if (do_round) value += .5; - return floor(value)/digitization_factor; -} -#endif -#endif /* RGB_TO_GRAY */ - -#ifdef PNG_READ_GAMMA_SUPPORTED -static double abserr(const png_modifier *pm, int in_depth, int out_depth) -{ - /* Absolute error permitted in linear values - affected by the bit depth of - * the calculations. - */ - if (pm->assume_16_bit_calculations || - (pm->calculations_use_input_precision ? in_depth : out_depth) == 16) - return pm->maxabs16; - else - return pm->maxabs8; -} - -static double calcerr(const png_modifier *pm, int in_depth, int out_depth) -{ - /* Error in the linear composition arithmetic - only relevant when - * composition actually happens (0 < alpha < 1). - */ - if ((pm->calculations_use_input_precision ? in_depth : out_depth) == 16) - return pm->maxcalc16; - else if (pm->assume_16_bit_calculations) - return pm->maxcalcG; - else - return pm->maxcalc8; -} - -static double pcerr(const png_modifier *pm, int in_depth, int out_depth) -{ - /* Percentage error permitted in the linear values. Note that the specified - * value is a percentage but this routine returns a simple number. - */ - if (pm->assume_16_bit_calculations || - (pm->calculations_use_input_precision ? in_depth : out_depth) == 16) - return pm->maxpc16 * .01; - else - return pm->maxpc8 * .01; -} - -/* Output error - the error in the encoded value. This is determined by the - * digitization of the output so can be +/-0.5 in the actual output value. In - * the expand_16 case with the current code in libpng the expand happens after - * all the calculations are done in 8 bit arithmetic, so even though the output - * depth is 16 the output error is determined by the 8 bit calculation. - * - * This limit is not determined by the bit depth of internal calculations. - * - * The specified parameter does *not* include the base .5 digitization error but - * it is added here. - */ -static double outerr(const png_modifier *pm, int in_depth, int out_depth) -{ - /* There is a serious error in the 2 and 4 bit grayscale transform because - * the gamma table value (8 bits) is simply shifted, not rounded, so the - * error in 4 bit grayscale gamma is up to the value below. This is a hack - * to allow pngvalid to succeed: - * - * TODO: fix this in libpng - */ - if (out_depth == 2) - return .73182-.5; - - if (out_depth == 4) - return .90644-.5; - - if ((pm->calculations_use_input_precision ? in_depth : out_depth) == 16) - return pm->maxout16; - - /* This is the case where the value was calculated at 8-bit precision then - * scaled to 16 bits. - */ - else if (out_depth == 16) - return pm->maxout8 * 257; - - else - return pm->maxout8; -} - -/* This does the same thing as the above however it returns the value to log, - * rather than raising a warning. This is useful for debugging to track down - * exactly what set of parameters cause high error values. - */ -static double outlog(const png_modifier *pm, int in_depth, int out_depth) -{ - /* The command line parameters are either 8 bit (0..255) or 16 bit (0..65535) - * and so must be adjusted for low bit depth grayscale: - */ - if (out_depth <= 8) - { - if (pm->log8 == 0) /* switched off */ - return 256; - - if (out_depth < 8) - return pm->log8 / 255 * ((1<log8; - } - - if ((pm->calculations_use_input_precision ? in_depth : out_depth) == 16) - { - if (pm->log16 == 0) - return 65536; - - return pm->log16; - } - - /* This is the case where the value was calculated at 8-bit precision then - * scaled to 16 bits. - */ - if (pm->log8 == 0) - return 65536; - - return pm->log8 * 257; -} - -/* This complements the above by providing the appropriate quantization for the - * final value. Normally this would just be quantization to an integral value, - * but in the 8 bit calculation case it's actually quantization to a multiple of - * 257! - */ -static int output_quantization_factor(const png_modifier *pm, int in_depth, - int out_depth) -{ - if (out_depth == 16 && in_depth != 16 && - pm->calculations_use_input_precision) - return 257; - else - return 1; -} -#endif /* PNG_READ_GAMMA_SUPPORTED */ - -/* One modification structure must be provided for each chunk to be modified (in - * fact more than one can be provided if multiple separate changes are desired - * for a single chunk.) Modifications include adding a new chunk when a - * suitable chunk does not exist. - * - * The caller of modify_fn will reset the CRC of the chunk and record 'modified' - * or 'added' as appropriate if the modify_fn returns 1 (true). If the - * modify_fn is NULL the chunk is simply removed. - */ -typedef struct png_modification -{ - struct png_modification *next; - png_uint_32 chunk; - - /* If the following is NULL all matching chunks will be removed: */ - int (*modify_fn)(struct png_modifier *pm, - struct png_modification *me, int add); - - /* If the following is set to PLTE, IDAT or IEND and the chunk has not been - * found and modified (and there is a modify_fn) the modify_fn will be called - * to add the chunk before the relevant chunk. - */ - png_uint_32 add; - unsigned int modified :1; /* Chunk was modified */ - unsigned int added :1; /* Chunk was added */ - unsigned int removed :1; /* Chunk was removed */ -} png_modification; - -static void -modification_reset(png_modification *pmm) -{ - if (pmm != NULL) - { - pmm->modified = 0; - pmm->added = 0; - pmm->removed = 0; - modification_reset(pmm->next); - } -} - -static void -modification_init(png_modification *pmm) -{ - memset(pmm, 0, sizeof *pmm); - pmm->next = NULL; - pmm->chunk = 0; - pmm->modify_fn = NULL; - pmm->add = 0; - modification_reset(pmm); -} - -#ifdef PNG_READ_RGB_TO_GRAY_SUPPORTED -static void -modifier_current_encoding(const png_modifier *pm, color_encoding *ce) -{ - if (pm->current_encoding != 0) - *ce = *pm->current_encoding; - - else - memset(ce, 0, sizeof *ce); - - ce->gamma = pm->current_gamma; -} -#endif - -#ifdef PNG_READ_TRANSFORMS_SUPPORTED -static size_t -safecat_current_encoding(char *buffer, size_t bufsize, size_t pos, - const png_modifier *pm) -{ - pos = safecat_color_encoding(buffer, bufsize, pos, pm->current_encoding, - pm->current_gamma); - - if (pm->encoding_ignored) - pos = safecat(buffer, bufsize, pos, "[overridden]"); - - return pos; -} -#endif - -/* Iterate through the usefully testable color encodings. An encoding is one - * of: - * - * 1) Nothing (no color space, no gamma). - * 2) Just a gamma value from the gamma array (including 1.0) - * 3) A color space from the encodings array with the corresponding gamma. - * 4) The same, but with gamma 1.0 (only really useful with 16 bit calculations) - * - * The iterator selects these in turn, the randomizer selects one at random, - * which is used depends on the setting of the 'test_exhaustive' flag. Notice - * that this function changes the colour space encoding so it must only be - * called on completion of the previous test. This is what 'modifier_reset' - * does, below. - * - * After the function has been called the 'repeat' flag will still be set; the - * caller of modifier_reset must reset it at the start of each run of the test! - */ -static unsigned int -modifier_total_encodings(const png_modifier *pm) -{ - return 1 + /* (1) nothing */ - pm->ngammas + /* (2) gamma values to test */ - pm->nencodings + /* (3) total number of encodings */ - /* The following test only works after the first time through the - * png_modifier code because 'bit_depth' is set when the IHDR is read. - * modifier_reset, below, preserves the setting until after it has called - * the iterate function (also below.) - * - * For this reason do not rely on this function outside a call to - * modifier_reset. - */ - ((pm->bit_depth == 16 || pm->assume_16_bit_calculations) ? - pm->nencodings : 0); /* (4) encodings with gamma == 1.0 */ -} - -static void -modifier_encoding_iterate(png_modifier *pm) -{ - if (!pm->repeat && /* Else something needs the current encoding again. */ - pm->test_uses_encoding) /* Some transform is encoding dependent */ - { - if (pm->test_exhaustive) - { - if (++pm->encoding_counter >= modifier_total_encodings(pm)) - pm->encoding_counter = 0; /* This will stop the repeat */ - } - - else - { - /* Not exhaustive - choose an encoding at random; generate a number in - * the range 1..(max-1), so the result is always non-zero: - */ - if (pm->encoding_counter == 0) - pm->encoding_counter = random_mod(modifier_total_encodings(pm)-1)+1; - else - pm->encoding_counter = 0; - } - - if (pm->encoding_counter > 0) - pm->repeat = 1; - } - - else if (!pm->repeat) - pm->encoding_counter = 0; -} - -static void -modifier_reset(png_modifier *pm) -{ - store_read_reset(&pm->this); - pm->limit = 4E-3; - pm->pending_len = pm->pending_chunk = 0; - pm->flush = pm->buffer_count = pm->buffer_position = 0; - pm->modifications = NULL; - pm->state = modifier_start; - modifier_encoding_iterate(pm); - /* The following must be set in the next run. In particular - * test_uses_encodings must be set in the _ini function of each transform - * that looks at the encodings. (Not the 'add' function!) - */ - pm->test_uses_encoding = 0; - pm->current_gamma = 0; - pm->current_encoding = 0; - pm->encoding_ignored = 0; - /* These only become value after IHDR is read: */ - pm->bit_depth = pm->colour_type = 0; -} - -/* The following must be called before anything else to get the encoding set up - * on the modifier. In particular it must be called before the transform init - * functions are called. - */ -static void -modifier_set_encoding(png_modifier *pm) -{ - /* Set the encoding to the one specified by the current encoding counter, - * first clear out all the settings - this corresponds to an encoding_counter - * of 0. - */ - pm->current_gamma = 0; - pm->current_encoding = 0; - pm->encoding_ignored = 0; /* not ignored yet - happens in _ini functions. */ - - /* Now, if required, set the gamma and encoding fields. */ - if (pm->encoding_counter > 0) - { - /* The gammas[] array is an array of screen gammas, not encoding gammas, - * so we need the inverse: - */ - if (pm->encoding_counter <= pm->ngammas) - pm->current_gamma = 1/pm->gammas[pm->encoding_counter-1]; - - else - { - unsigned int i = pm->encoding_counter - pm->ngammas; - - if (i >= pm->nencodings) - { - i %= pm->nencodings; - pm->current_gamma = 1; /* Linear, only in the 16 bit case */ - } - - else - pm->current_gamma = pm->encodings[i].gamma; - - pm->current_encoding = pm->encodings + i; - } - } -} - -/* Enquiry functions to find out what is set. Notice that there is an implicit - * assumption below that the first encoding in the list is the one for sRGB. - */ -static int -modifier_color_encoding_is_sRGB(const png_modifier *pm) -{ - return pm->current_encoding != 0 && pm->current_encoding == pm->encodings && - pm->current_encoding->gamma == pm->current_gamma; -} - -static int -modifier_color_encoding_is_set(const png_modifier *pm) -{ - return pm->current_gamma != 0; -} - -/* The guts of modification are performed during a read. */ -static void -modifier_crc(png_bytep buffer) -{ - /* Recalculate the chunk CRC - a complete chunk must be in - * the buffer, at the start. - */ - uInt datalen = png_get_uint_32(buffer); - uLong crc = crc32(0, buffer+4, datalen+4); - /* The cast to png_uint_32 is safe because a crc32 is always a 32 bit value. - */ - png_save_uint_32(buffer+datalen+8, (png_uint_32)crc); -} - -static void -modifier_setbuffer(png_modifier *pm) -{ - modifier_crc(pm->buffer); - pm->buffer_count = png_get_uint_32(pm->buffer)+12; - pm->buffer_position = 0; -} - -/* Separate the callback into the actual implementation (which is passed the - * png_modifier explicitly) and the callback, which gets the modifier from the - * png_struct. - */ -static void -modifier_read_imp(png_modifier *pm, png_bytep pb, size_t st) -{ - while (st > 0) - { - size_t cb; - png_uint_32 len, chunk; - png_modification *mod; - - if (pm->buffer_position >= pm->buffer_count) switch (pm->state) - { - static png_byte sign[8] = { 137, 80, 78, 71, 13, 10, 26, 10 }; - case modifier_start: - store_read_chunk(&pm->this, pm->buffer, 8, 8); /* signature. */ - pm->buffer_count = 8; - pm->buffer_position = 0; - - if (memcmp(pm->buffer, sign, 8) != 0) - png_error(pm->this.pread, "invalid PNG file signature"); - pm->state = modifier_signature; - break; - - case modifier_signature: - store_read_chunk(&pm->this, pm->buffer, 13+12, 13+12); /* IHDR */ - pm->buffer_count = 13+12; - pm->buffer_position = 0; - - if (png_get_uint_32(pm->buffer) != 13 || - png_get_uint_32(pm->buffer+4) != CHUNK_IHDR) - png_error(pm->this.pread, "invalid IHDR"); - - /* Check the list of modifiers for modifications to the IHDR. */ - mod = pm->modifications; - while (mod != NULL) - { - if (mod->chunk == CHUNK_IHDR && mod->modify_fn && - (*mod->modify_fn)(pm, mod, 0)) - { - mod->modified = 1; - modifier_setbuffer(pm); - } - - /* Ignore removal or add if IHDR! */ - mod = mod->next; - } - - /* Cache information from the IHDR (the modified one.) */ - pm->bit_depth = pm->buffer[8+8]; - pm->colour_type = pm->buffer[8+8+1]; - - pm->state = modifier_IHDR; - pm->flush = 0; - break; - - case modifier_IHDR: - default: - /* Read a new chunk and process it until we see PLTE, IDAT or - * IEND. 'flush' indicates that there is still some data to - * output from the preceding chunk. - */ - if ((cb = pm->flush) > 0) - { - if (cb > st) cb = st; - pm->flush -= cb; - store_read_chunk(&pm->this, pb, cb, cb); - pb += cb; - st -= cb; - if (st == 0) return; - } - - /* No more bytes to flush, read a header, or handle a pending - * chunk. - */ - if (pm->pending_chunk != 0) - { - png_save_uint_32(pm->buffer, pm->pending_len); - png_save_uint_32(pm->buffer+4, pm->pending_chunk); - pm->pending_len = 0; - pm->pending_chunk = 0; - } - else - store_read_chunk(&pm->this, pm->buffer, 8, 8); - - pm->buffer_count = 8; - pm->buffer_position = 0; - - /* Check for something to modify or a terminator chunk. */ - len = png_get_uint_32(pm->buffer); - chunk = png_get_uint_32(pm->buffer+4); - - /* Terminators first, they may have to be delayed for added - * chunks - */ - if (chunk == CHUNK_PLTE || chunk == CHUNK_IDAT || - chunk == CHUNK_IEND) - { - mod = pm->modifications; - - while (mod != NULL) - { - if ((mod->add == chunk || - (mod->add == CHUNK_PLTE && chunk == CHUNK_IDAT)) && - mod->modify_fn != NULL && !mod->modified && !mod->added) - { - /* Regardless of what the modify function does do not run - * this again. - */ - mod->added = 1; - - if ((*mod->modify_fn)(pm, mod, 1 /*add*/)) - { - /* Reset the CRC on a new chunk */ - if (pm->buffer_count > 0) - modifier_setbuffer(pm); - - else - { - pm->buffer_position = 0; - mod->removed = 1; - } - - /* The buffer has been filled with something (we assume) - * so output this. Pend the current chunk. - */ - pm->pending_len = len; - pm->pending_chunk = chunk; - break; /* out of while */ - } - } - - mod = mod->next; - } - - /* Don't do any further processing if the buffer was modified - - * otherwise the code will end up modifying a chunk that was - * just added. - */ - if (mod != NULL) - break; /* out of switch */ - } - - /* If we get to here then this chunk may need to be modified. To - * do this it must be less than 1024 bytes in total size, otherwise - * it just gets flushed. - */ - if (len+12 <= sizeof pm->buffer) - { - size_t s = len+12-pm->buffer_count; - store_read_chunk(&pm->this, pm->buffer+pm->buffer_count, s, s); - pm->buffer_count = len+12; - - /* Check for a modification, else leave it be. */ - mod = pm->modifications; - while (mod != NULL) - { - if (mod->chunk == chunk) - { - if (mod->modify_fn == NULL) - { - /* Remove this chunk */ - pm->buffer_count = pm->buffer_position = 0; - mod->removed = 1; - break; /* Terminate the while loop */ - } - - else if ((*mod->modify_fn)(pm, mod, 0)) - { - mod->modified = 1; - /* The chunk may have been removed: */ - if (pm->buffer_count == 0) - { - pm->buffer_position = 0; - break; - } - modifier_setbuffer(pm); - } - } - - mod = mod->next; - } - } - - else - pm->flush = len+12 - pm->buffer_count; /* data + crc */ - - /* Take the data from the buffer (if there is any). */ - break; - } - - /* Here to read from the modifier buffer (not directly from - * the store, as in the flush case above.) - */ - cb = pm->buffer_count - pm->buffer_position; - - if (cb > st) - cb = st; - - memcpy(pb, pm->buffer + pm->buffer_position, cb); - st -= cb; - pb += cb; - pm->buffer_position += cb; - } -} - -/* The callback: */ -static void PNGCBAPI -modifier_read(png_structp ppIn, png_bytep pb, size_t st) -{ - png_const_structp pp = ppIn; - png_modifier *pm = voidcast(png_modifier*, png_get_io_ptr(pp)); - - if (pm == NULL || pm->this.pread != pp) - png_error(pp, "bad modifier_read call"); - - modifier_read_imp(pm, pb, st); -} - -/* Like store_progressive_read but the data is getting changed as we go so we - * need a local buffer. - */ -static void -modifier_progressive_read(png_modifier *pm, png_structp pp, png_infop pi) -{ - if (pm->this.pread != pp || pm->this.current == NULL || - pm->this.next == NULL) - png_error(pp, "store state damaged (progressive)"); - - /* This is another Horowitz and Hill random noise generator. In this case - * the aim is to stress the progressive reader with truly horrible variable - * buffer sizes in the range 1..500, so a sequence of 9 bit random numbers - * is generated. We could probably just count from 1 to 32767 and get as - * good a result. - */ - for (;;) - { - static png_uint_32 noise = 1; - size_t cb, cbAvail; - png_byte buffer[512]; - - /* Generate 15 more bits of stuff: */ - noise = (noise << 9) | ((noise ^ (noise >> (9-5))) & 0x1ff); - cb = noise & 0x1ff; - - /* Check that this number of bytes are available (in the current buffer.) - * (This doesn't quite work - the modifier might delete a chunk; unlikely - * but possible, it doesn't happen at present because the modifier only - * adds chunks to standard images.) - */ - cbAvail = store_read_buffer_avail(&pm->this); - if (pm->buffer_count > pm->buffer_position) - cbAvail += pm->buffer_count - pm->buffer_position; - - if (cb > cbAvail) - { - /* Check for EOF: */ - if (cbAvail == 0) - break; - - cb = cbAvail; - } - - modifier_read_imp(pm, buffer, cb); - png_process_data(pp, pi, buffer, cb); - } - - /* Check the invariants at the end (if this fails it's a problem in this - * file!) - */ - if (pm->buffer_count > pm->buffer_position || - pm->this.next != &pm->this.current->data || - pm->this.readpos < pm->this.current->datacount) - png_error(pp, "progressive read implementation error"); -} - -/* Set up a modifier. */ -static png_structp -set_modifier_for_read(png_modifier *pm, png_infopp ppi, png_uint_32 id, - const char *name) -{ - /* Do this first so that the modifier fields are cleared even if an error - * happens allocating the png_struct. No allocation is done here so no - * cleanup is required. - */ - pm->state = modifier_start; - pm->bit_depth = 0; - pm->colour_type = 255; - - pm->pending_len = 0; - pm->pending_chunk = 0; - pm->flush = 0; - pm->buffer_count = 0; - pm->buffer_position = 0; - - return set_store_for_read(&pm->this, ppi, id, name); -} - - -/******************************** MODIFICATIONS *******************************/ -/* Standard modifications to add chunks. These do not require the _SUPPORTED - * macros because the chunks can be there regardless of whether this specific - * libpng supports them. - */ -typedef struct gama_modification -{ - png_modification this; - png_fixed_point gamma; -} gama_modification; - -static int -gama_modify(png_modifier *pm, png_modification *me, int add) -{ - UNUSED(add) - /* This simply dumps the given gamma value into the buffer. */ - png_save_uint_32(pm->buffer, 4); - png_save_uint_32(pm->buffer+4, CHUNK_gAMA); - png_save_uint_32(pm->buffer+8, ((gama_modification*)me)->gamma); - return 1; -} - -static void -gama_modification_init(gama_modification *me, png_modifier *pm, double gammad) -{ - double g; - - modification_init(&me->this); - me->this.chunk = CHUNK_gAMA; - me->this.modify_fn = gama_modify; - me->this.add = CHUNK_PLTE; - g = fix(gammad); - me->gamma = (png_fixed_point)g; - me->this.next = pm->modifications; - pm->modifications = &me->this; -} - -typedef struct chrm_modification -{ - png_modification this; - const color_encoding *encoding; - png_fixed_point wx, wy, rx, ry, gx, gy, bx, by; -} chrm_modification; - -static int -chrm_modify(png_modifier *pm, png_modification *me, int add) -{ - UNUSED(add) - /* As with gAMA this just adds the required cHRM chunk to the buffer. */ - png_save_uint_32(pm->buffer , 32); - png_save_uint_32(pm->buffer+ 4, CHUNK_cHRM); - png_save_uint_32(pm->buffer+ 8, ((chrm_modification*)me)->wx); - png_save_uint_32(pm->buffer+12, ((chrm_modification*)me)->wy); - png_save_uint_32(pm->buffer+16, ((chrm_modification*)me)->rx); - png_save_uint_32(pm->buffer+20, ((chrm_modification*)me)->ry); - png_save_uint_32(pm->buffer+24, ((chrm_modification*)me)->gx); - png_save_uint_32(pm->buffer+28, ((chrm_modification*)me)->gy); - png_save_uint_32(pm->buffer+32, ((chrm_modification*)me)->bx); - png_save_uint_32(pm->buffer+36, ((chrm_modification*)me)->by); - return 1; -} - -static void -chrm_modification_init(chrm_modification *me, png_modifier *pm, - const color_encoding *encoding) -{ - CIE_color white = white_point(encoding); - - /* Original end points: */ - me->encoding = encoding; - - /* Chromaticities (in fixed point): */ - me->wx = fix(chromaticity_x(white)); - me->wy = fix(chromaticity_y(white)); - - me->rx = fix(chromaticity_x(encoding->red)); - me->ry = fix(chromaticity_y(encoding->red)); - me->gx = fix(chromaticity_x(encoding->green)); - me->gy = fix(chromaticity_y(encoding->green)); - me->bx = fix(chromaticity_x(encoding->blue)); - me->by = fix(chromaticity_y(encoding->blue)); - - modification_init(&me->this); - me->this.chunk = CHUNK_cHRM; - me->this.modify_fn = chrm_modify; - me->this.add = CHUNK_PLTE; - me->this.next = pm->modifications; - pm->modifications = &me->this; -} - -typedef struct srgb_modification -{ - png_modification this; - png_byte intent; -} srgb_modification; - -static int -srgb_modify(png_modifier *pm, png_modification *me, int add) -{ - UNUSED(add) - /* As above, ignore add and just make a new chunk */ - png_save_uint_32(pm->buffer, 1); - png_save_uint_32(pm->buffer+4, CHUNK_sRGB); - pm->buffer[8] = ((srgb_modification*)me)->intent; - return 1; -} - -static void -srgb_modification_init(srgb_modification *me, png_modifier *pm, png_byte intent) -{ - modification_init(&me->this); - me->this.chunk = CHUNK_sBIT; - - if (intent <= 3) /* if valid, else *delete* sRGB chunks */ - { - me->this.modify_fn = srgb_modify; - me->this.add = CHUNK_PLTE; - me->intent = intent; - } - - else - { - me->this.modify_fn = 0; - me->this.add = 0; - me->intent = 0; - } - - me->this.next = pm->modifications; - pm->modifications = &me->this; -} - -#ifdef PNG_READ_GAMMA_SUPPORTED -typedef struct sbit_modification -{ - png_modification this; - png_byte sbit; -} sbit_modification; - -static int -sbit_modify(png_modifier *pm, png_modification *me, int add) -{ - png_byte sbit = ((sbit_modification*)me)->sbit; - if (pm->bit_depth > sbit) - { - int cb = 0; - switch (pm->colour_type) - { - case 0: - cb = 1; - break; - - case 2: - case 3: - cb = 3; - break; - - case 4: - cb = 2; - break; - - case 6: - cb = 4; - break; - - default: - png_error(pm->this.pread, - "unexpected colour type in sBIT modification"); - } - - png_save_uint_32(pm->buffer, cb); - png_save_uint_32(pm->buffer+4, CHUNK_sBIT); - - while (cb > 0) - (pm->buffer+8)[--cb] = sbit; - - return 1; - } - else if (!add) - { - /* Remove the sBIT chunk */ - pm->buffer_count = pm->buffer_position = 0; - return 1; - } - else - return 0; /* do nothing */ -} - -static void -sbit_modification_init(sbit_modification *me, png_modifier *pm, png_byte sbit) -{ - modification_init(&me->this); - me->this.chunk = CHUNK_sBIT; - me->this.modify_fn = sbit_modify; - me->this.add = CHUNK_PLTE; - me->sbit = sbit; - me->this.next = pm->modifications; - pm->modifications = &me->this; -} -#endif /* PNG_READ_GAMMA_SUPPORTED */ -#endif /* PNG_READ_TRANSFORMS_SUPPORTED */ - -/***************************** STANDARD PNG FILES *****************************/ -/* Standard files - write and save standard files. */ -/* There are two basic forms of standard images. Those which attempt to have - * all the possible pixel values (not possible for 16bpp images, but a range of - * values are produced) and those which have a range of image sizes. The former - * are used for testing transforms, in particular gamma correction and bit - * reduction and increase. The latter are reserved for testing the behavior of - * libpng with respect to 'odd' image sizes - particularly small images where - * rows become 1 byte and interlace passes disappear. - * - * The first, most useful, set are the 'transform' images, the second set of - * small images are the 'size' images. - * - * The transform files are constructed with rows which fit into a 1024 byte row - * buffer. This makes allocation easier below. Further regardless of the file - * format every row has 128 pixels (giving 1024 bytes for 64bpp formats). - * - * Files are stored with no gAMA or sBIT chunks, with a PLTE only when needed - * and with an ID derived from the colour type, bit depth and interlace type - * as above (FILEID). The width (128) and height (variable) are not stored in - * the FILEID - instead the fields are set to 0, indicating a transform file. - * - * The size files ar constructed with rows a maximum of 128 bytes wide, allowing - * a maximum width of 16 pixels (for the 64bpp case.) They also have a maximum - * height of 16 rows. The width and height are stored in the FILEID and, being - * non-zero, indicate a size file. - * - * Because the PNG filter code is typically the largest CPU consumer within - * libpng itself there is a tendency to attempt to optimize it. This results in - * special case code which needs to be validated. To cause this to happen the - * 'size' images are made to use each possible filter, in so far as this is - * possible for smaller images. - * - * For palette image (colour type 3) multiple transform images are stored with - * the same bit depth to allow testing of more colour combinations - - * particularly important for testing the gamma code because libpng uses a - * different code path for palette images. For size images a single palette is - * used. - */ - -/* Make a 'standard' palette. Because there are only 256 entries in a palette - * (maximum) this actually makes a random palette in the hope that enough tests - * will catch enough errors. (Note that the same palette isn't produced every - * time for the same test - it depends on what previous tests have been run - - * but a given set of arguments to pngvalid will always produce the same palette - * at the same test! This is why pseudo-random number generators are useful for - * testing.) - * - * The store must be open for write when this is called, otherwise an internal - * error will occur. This routine contains its own magic number seed, so the - * palettes generated don't change if there are intervening errors (changing the - * calls to the store_mark seed.) - */ -static store_palette_entry * -make_standard_palette(png_store* ps, int npalette, int do_tRNS) -{ - static png_uint_32 palette_seed[2] = { 0x87654321, 9 }; - - int i = 0; - png_byte values[256][4]; - - /* Always put in black and white plus the six primary and secondary colors. - */ - for (; i<8; ++i) - { - values[i][1] = (png_byte)((i&1) ? 255U : 0U); - values[i][2] = (png_byte)((i&2) ? 255U : 0U); - values[i][3] = (png_byte)((i&4) ? 255U : 0U); - } - - /* Then add 62 grays (one quarter of the remaining 256 slots). */ - { - int j = 0; - png_byte random_bytes[4]; - png_byte need[256]; - - need[0] = 0; /*got black*/ - memset(need+1, 1, (sizeof need)-2); /*need these*/ - need[255] = 0; /*but not white*/ - - while (i<70) - { - png_byte b; - - if (j==0) - { - make_four_random_bytes(palette_seed, random_bytes); - j = 4; - } - - b = random_bytes[--j]; - if (need[b]) - { - values[i][1] = b; - values[i][2] = b; - values[i++][3] = b; - } - } - } - - /* Finally add 192 colors at random - don't worry about matches to things we - * already have, chance is less than 1/65536. Don't worry about grays, - * chance is the same, so we get a duplicate or extra gray less than 1 time - * in 170. - */ - for (; i<256; ++i) - make_four_random_bytes(palette_seed, values[i]); - - /* Fill in the alpha values in the first byte. Just use all possible values - * (0..255) in an apparently random order: - */ - { - store_palette_entry *palette; - png_byte selector[4]; - - make_four_random_bytes(palette_seed, selector); - - if (do_tRNS) - for (i=0; i<256; ++i) - values[i][0] = (png_byte)(i ^ selector[0]); - - else - for (i=0; i<256; ++i) - values[i][0] = 255; /* no transparency/tRNS chunk */ - - /* 'values' contains 256 ARGB values, but we only need 'npalette'. - * 'npalette' will always be a power of 2: 2, 4, 16 or 256. In the low - * bit depth cases select colors at random, else it is difficult to have - * a set of low bit depth palette test with any chance of a reasonable - * range of colors. Do this by randomly permuting values into the low - * 'npalette' entries using an XOR mask generated here. This also - * permutes the npalette == 256 case in a potentially useful way (there is - * no relationship between palette index and the color value therein!) - */ - palette = store_write_palette(ps, npalette); - - for (i=0; i 0) - png_set_tRNS(pp, pi, tRNS, j, 0/*color*/); -#endif - } -} - -#ifdef PNG_WRITE_tRNS_SUPPORTED -static void -set_random_tRNS(png_structp pp, png_infop pi, png_byte colour_type, - int bit_depth) -{ - /* To make this useful the tRNS color needs to match at least one pixel. - * Random values are fine for gray, including the 16-bit case where we know - * that the test image contains all the gray values. For RGB we need more - * method as only 65536 different RGB values are generated. - */ - png_color_16 tRNS; - png_uint_16 mask = (png_uint_16)((1U << bit_depth)-1); - - R8(tRNS); /* makes unset fields random */ - - if (colour_type & 2/*RGB*/) - { - if (bit_depth == 8) - { - tRNS.red = random_u16(); - tRNS.green = random_u16(); - tRNS.blue = tRNS.red ^ tRNS.green; - tRNS.red &= mask; - tRNS.green &= mask; - tRNS.blue &= mask; - } - - else /* bit_depth == 16 */ - { - tRNS.red = random_u16(); - tRNS.green = (png_uint_16)(tRNS.red * 257); - tRNS.blue = (png_uint_16)(tRNS.green * 17); - } - } - - else - { - tRNS.gray = random_u16(); - tRNS.gray &= mask; - } - - png_set_tRNS(pp, pi, NULL, 0, &tRNS); -} -#endif - -/* The number of passes is related to the interlace type. There was no libpng - * API to determine this prior to 1.5, so we need an inquiry function: - */ -static int -npasses_from_interlace_type(png_const_structp pp, int interlace_type) -{ - switch (interlace_type) - { - default: - png_error(pp, "invalid interlace type"); - - case PNG_INTERLACE_NONE: - return 1; - - case PNG_INTERLACE_ADAM7: - return PNG_INTERLACE_ADAM7_PASSES; - } -} - -static unsigned int -bit_size(png_const_structp pp, png_byte colour_type, png_byte bit_depth) -{ - switch (colour_type) - { - default: png_error(pp, "invalid color type"); - - case 0: return bit_depth; - - case 2: return 3*bit_depth; - - case 3: return bit_depth; - - case 4: return 2*bit_depth; - - case 6: return 4*bit_depth; - } -} - -#define TRANSFORM_WIDTH 128U -#define TRANSFORM_ROWMAX (TRANSFORM_WIDTH*8U) -#define SIZE_ROWMAX (16*8U) /* 16 pixels, max 8 bytes each - 128 bytes */ -#define STANDARD_ROWMAX TRANSFORM_ROWMAX /* The larger of the two */ -#define SIZE_HEIGHTMAX 16 /* Maximum range of size images */ - -static size_t -transform_rowsize(png_const_structp pp, png_byte colour_type, - png_byte bit_depth) -{ - return (TRANSFORM_WIDTH * bit_size(pp, colour_type, bit_depth)) / 8; -} - -/* transform_width(pp, colour_type, bit_depth) current returns the same number - * every time, so just use a macro: - */ -#define transform_width(pp, colour_type, bit_depth) TRANSFORM_WIDTH - -static png_uint_32 -transform_height(png_const_structp pp, png_byte colour_type, png_byte bit_depth) -{ - switch (bit_size(pp, colour_type, bit_depth)) - { - case 1: - case 2: - case 4: - return 1; /* Total of 128 pixels */ - - case 8: - return 2; /* Total of 256 pixels/bytes */ - - case 16: - return 512; /* Total of 65536 pixels */ - - case 24: - case 32: - return 512; /* 65536 pixels */ - - case 48: - case 64: - return 2048;/* 4 x 65536 pixels. */ -# define TRANSFORM_HEIGHTMAX 2048 - - default: - return 0; /* Error, will be caught later */ - } -} - -#ifdef PNG_READ_SUPPORTED -/* The following can only be defined here, now we have the definitions - * of the transform image sizes. - */ -static png_uint_32 -standard_width(png_const_structp pp, png_uint_32 id) -{ - png_uint_32 width = WIDTH_FROM_ID(id); - UNUSED(pp) - - if (width == 0) - width = transform_width(pp, COL_FROM_ID(id), DEPTH_FROM_ID(id)); - - return width; -} - -static png_uint_32 -standard_height(png_const_structp pp, png_uint_32 id) -{ - png_uint_32 height = HEIGHT_FROM_ID(id); - - if (height == 0) - height = transform_height(pp, COL_FROM_ID(id), DEPTH_FROM_ID(id)); - - return height; -} - -static png_uint_32 -standard_rowsize(png_const_structp pp, png_uint_32 id) -{ - png_uint_32 width = standard_width(pp, id); - - /* This won't overflow: */ - width *= bit_size(pp, COL_FROM_ID(id), DEPTH_FROM_ID(id)); - return (width + 7) / 8; -} -#endif /* PNG_READ_SUPPORTED */ - -static void -transform_row(png_const_structp pp, png_byte buffer[TRANSFORM_ROWMAX], - png_byte colour_type, png_byte bit_depth, png_uint_32 y) -{ - png_uint_32 v = y << 7; - png_uint_32 i = 0; - - switch (bit_size(pp, colour_type, bit_depth)) - { - case 1: - while (i<128/8) buffer[i] = (png_byte)(v & 0xff), v += 17, ++i; - return; - - case 2: - while (i<128/4) buffer[i] = (png_byte)(v & 0xff), v += 33, ++i; - return; - - case 4: - while (i<128/2) buffer[i] = (png_byte)(v & 0xff), v += 65, ++i; - return; - - case 8: - /* 256 bytes total, 128 bytes in each row set as follows: */ - while (i<128) buffer[i] = (png_byte)(v & 0xff), ++v, ++i; - return; - - case 16: - /* Generate all 65536 pixel values in order, which includes the 8 bit - * GA case as well as the 16 bit G case. - */ - while (i<128) - { - buffer[2*i] = (png_byte)((v>>8) & 0xff); - buffer[2*i+1] = (png_byte)(v & 0xff); - ++v; - ++i; - } - - return; - - case 24: - /* 65535 pixels, but rotate the values. */ - while (i<128) - { - /* Three bytes per pixel, r, g, b, make b by r^g */ - buffer[3*i+0] = (png_byte)((v >> 8) & 0xff); - buffer[3*i+1] = (png_byte)(v & 0xff); - buffer[3*i+2] = (png_byte)(((v >> 8) ^ v) & 0xff); - ++v; - ++i; - } - - return; - - case 32: - /* 65535 pixels, r, g, b, a; just replicate */ - while (i<128) - { - buffer[4*i+0] = (png_byte)((v >> 8) & 0xff); - buffer[4*i+1] = (png_byte)(v & 0xff); - buffer[4*i+2] = (png_byte)((v >> 8) & 0xff); - buffer[4*i+3] = (png_byte)(v & 0xff); - ++v; - ++i; - } - - return; - - case 48: - /* y is maximum 2047, giving 4x65536 pixels, make 'r' increase by 1 at - * each pixel, g increase by 257 (0x101) and 'b' by 0x1111: - */ - while (i<128) - { - png_uint_32 t = v++; - buffer[6*i+0] = (png_byte)((t >> 8) & 0xff); - buffer[6*i+1] = (png_byte)(t & 0xff); - t *= 257; - buffer[6*i+2] = (png_byte)((t >> 8) & 0xff); - buffer[6*i+3] = (png_byte)(t & 0xff); - t *= 17; - buffer[6*i+4] = (png_byte)((t >> 8) & 0xff); - buffer[6*i+5] = (png_byte)(t & 0xff); - ++i; - } - - return; - - case 64: - /* As above in the 32 bit case. */ - while (i<128) - { - png_uint_32 t = v++; - buffer[8*i+0] = (png_byte)((t >> 8) & 0xff); - buffer[8*i+1] = (png_byte)(t & 0xff); - buffer[8*i+4] = (png_byte)((t >> 8) & 0xff); - buffer[8*i+5] = (png_byte)(t & 0xff); - t *= 257; - buffer[8*i+2] = (png_byte)((t >> 8) & 0xff); - buffer[8*i+3] = (png_byte)(t & 0xff); - buffer[8*i+6] = (png_byte)((t >> 8) & 0xff); - buffer[8*i+7] = (png_byte)(t & 0xff); - ++i; - } - return; - - default: - break; - } - - png_error(pp, "internal error"); -} - -/* This is just to do the right cast - could be changed to a function to check - * 'bd' but there isn't much point. - */ -#define DEPTH(bd) ((png_byte)(1U << (bd))) - -/* This is just a helper for compiling on minimal systems with no write - * interlacing support. If there is no write interlacing we can't generate test - * cases with interlace: - */ -#ifdef PNG_WRITE_INTERLACING_SUPPORTED -# define INTERLACE_LAST PNG_INTERLACE_LAST -# define check_interlace_type(type) ((void)(type)) -# define set_write_interlace_handling(pp,type) png_set_interlace_handling(pp) -# define do_own_interlace 0 -#elif PNG_LIBPNG_VER < 10700 -# define set_write_interlace_handling(pp,type) (1) -static void -check_interlace_type(int const interlace_type) -{ - /* Prior to 1.7.0 libpng does not support the write of an interlaced image - * unless PNG_WRITE_INTERLACING_SUPPORTED, even with do_interlace so the - * code here does the pixel interlace itself, so: - */ - if (interlace_type != PNG_INTERLACE_NONE) - { - /* This is an internal error - --interlace tests should be skipped, not - * attempted. - */ - fprintf(stderr, "pngvalid: no interlace support\n"); - exit(99); - } -} -# define INTERLACE_LAST (PNG_INTERLACE_NONE+1) -# define do_own_interlace 0 -#else /* libpng 1.7+ */ -# define set_write_interlace_handling(pp,type)\ - npasses_from_interlace_type(pp,type) -# define check_interlace_type(type) ((void)(type)) -# define INTERLACE_LAST PNG_INTERLACE_LAST -# define do_own_interlace 1 -#endif /* WRITE_INTERLACING tests */ - -#if PNG_LIBPNG_VER >= 10700 || defined PNG_WRITE_INTERLACING_SUPPORTED -# define CAN_WRITE_INTERLACE 1 -#else -# define CAN_WRITE_INTERLACE 0 -#endif - -/* Do the same thing for read interlacing; this controls whether read tests do - * their own de-interlace or use libpng. - */ -#ifdef PNG_READ_INTERLACING_SUPPORTED -# define do_read_interlace 0 -#else /* no libpng read interlace support */ -# define do_read_interlace 1 -#endif -/* The following two routines use the PNG interlace support macros from - * png.h to interlace or deinterlace rows. - */ -static void -interlace_row(png_bytep buffer, png_const_bytep imageRow, - unsigned int pixel_size, png_uint_32 w, int pass, int littleendian) -{ - png_uint_32 xin, xout, xstep; - - /* Note that this can, trivially, be optimized to a memcpy on pass 7, the - * code is presented this way to make it easier to understand. In practice - * consult the code in the libpng source to see other ways of doing this. - * - * It is OK for buffer and imageRow to be identical, because 'xin' moves - * faster than 'xout' and we copy up. - */ - xin = PNG_PASS_START_COL(pass); - xstep = 1U<wname); - text.text = copy; - text.text_length = pos; - text.itxt_length = 0; - text.lang = 0; - text.lang_key = 0; - - png_set_text(pp, pi, &text, 1); - } -#endif - - if (colour_type == 3) /* palette */ - init_standard_palette(ps, pp, pi, 1U << bit_depth, 1/*do tRNS*/); - -# ifdef PNG_WRITE_tRNS_SUPPORTED - else if (palette_number) - set_random_tRNS(pp, pi, colour_type, bit_depth); -# endif - - png_write_info(pp, pi); - - if (png_get_rowbytes(pp, pi) != - transform_rowsize(pp, colour_type, bit_depth)) - png_error(pp, "transform row size incorrect"); - - else - { - /* Somewhat confusingly this must be called *after* png_write_info - * because if it is called before, the information in *pp has not been - * updated to reflect the interlaced image. - */ - int npasses = set_write_interlace_handling(pp, interlace_type); - int pass; - - if (npasses != npasses_from_interlace_type(pp, interlace_type)) - png_error(pp, "write: png_set_interlace_handling failed"); - - for (pass=0; pass 0) - interlace_row(buffer, buffer, - bit_size(pp, colour_type, bit_depth), w, pass, - 0/*data always bigendian*/); - else - continue; - } -# endif /* do_own_interlace */ - - choose_random_filter(pp, pass == 0 && y == 0); - png_write_row(pp, buffer); - } - } - } - -#ifdef PNG_TEXT_SUPPORTED - { - static char key[] = "end marker"; - static char comment[] = "end"; - png_text text; - - /* Use a compressed text string to test the correct interaction of text - * compression and IDAT compression. - */ - text.compression = TEXT_COMPRESSION; - text.key = key; - text.text = comment; - text.text_length = (sizeof comment)-1; - text.itxt_length = 0; - text.lang = 0; - text.lang_key = 0; - - png_set_text(pp, pi, &text, 1); - } -#endif - - png_write_end(pp, pi); - - /* And store this under the appropriate id, then clean up. */ - store_storefile(ps, FILEID(colour_type, bit_depth, palette_number, - interlace_type, 0, 0, 0)); - - store_write_reset(ps); - } - - Catch(fault) - { - /* Use the png_store returned by the exception. This may help the compiler - * because 'ps' is not used in this branch of the setjmp. Note that fault - * and ps will always be the same value. - */ - store_write_reset(fault); - } -} - -static void -make_transform_images(png_modifier *pm) -{ - png_byte colour_type = 0; - png_byte bit_depth = 0; - unsigned int palette_number = 0; - - /* This is in case of errors. */ - safecat(pm->this.test, sizeof pm->this.test, 0, "make standard images"); - - /* Use next_format to enumerate all the combinations we test, including - * generating multiple low bit depth palette images. Non-A images (palette - * and direct) are created with and without tRNS chunks. - */ - while (next_format(&colour_type, &bit_depth, &palette_number, 1, 1)) - { - int interlace_type; - - for (interlace_type = PNG_INTERLACE_NONE; - interlace_type < INTERLACE_LAST; ++interlace_type) - { - char name[FILE_NAME_SIZE]; - - standard_name(name, sizeof name, 0, colour_type, bit_depth, - palette_number, interlace_type, 0, 0, do_own_interlace); - make_transform_image(&pm->this, colour_type, bit_depth, palette_number, - interlace_type, name); - } - } -} - -/* Build a single row for the 'size' test images; this fills in only the - * first bit_width bits of the sample row. - */ -static void -size_row(png_byte buffer[SIZE_ROWMAX], png_uint_32 bit_width, png_uint_32 y) -{ - /* height is in the range 1 to 16, so: */ - y = ((y & 1) << 7) + ((y & 2) << 6) + ((y & 4) << 5) + ((y & 8) << 4); - /* the following ensures bits are set in small images: */ - y ^= 0xA5; - - while (bit_width >= 8) - *buffer++ = (png_byte)y++, bit_width -= 8; - - /* There may be up to 7 remaining bits, these go in the most significant - * bits of the byte. - */ - if (bit_width > 0) - { - png_uint_32 mask = (1U<<(8-bit_width))-1; - *buffer = (png_byte)((*buffer & mask) | (y & ~mask)); - } -} - -static void -make_size_image(png_store* const ps, png_byte const colour_type, - png_byte const bit_depth, int const interlace_type, - png_uint_32 const w, png_uint_32 const h, - int const do_interlace) -{ - context(ps, fault); - - check_interlace_type(interlace_type); - - Try - { - png_infop pi; - png_structp pp; - unsigned int pixel_size; - - /* Make a name and get an appropriate id for the store: */ - char name[FILE_NAME_SIZE]; - png_uint_32 id = FILEID(colour_type, bit_depth, 0/*palette*/, - interlace_type, w, h, do_interlace); - - standard_name_from_id(name, sizeof name, 0, id); - pp = set_store_for_write(ps, &pi, name); - - /* In the event of a problem return control to the Catch statement below - * to do the clean up - it is not possible to 'return' directly from a Try - * block. - */ - if (pp == NULL) - Throw ps; - - png_set_IHDR(pp, pi, w, h, bit_depth, colour_type, interlace_type, - PNG_COMPRESSION_TYPE_BASE, PNG_FILTER_TYPE_BASE); - -#ifdef PNG_TEXT_SUPPORTED - { - static char key[] = "image name"; /* must be writeable */ - size_t pos; - png_text text; - char copy[FILE_NAME_SIZE]; - - /* Use a compressed text string to test the correct interaction of text - * compression and IDAT compression. - */ - text.compression = TEXT_COMPRESSION; - text.key = key; - /* Yuck: the text must be writable! */ - pos = safecat(copy, sizeof copy, 0, ps->wname); - text.text = copy; - text.text_length = pos; - text.itxt_length = 0; - text.lang = 0; - text.lang_key = 0; - - png_set_text(pp, pi, &text, 1); - } -#endif - - if (colour_type == 3) /* palette */ - init_standard_palette(ps, pp, pi, 1U << bit_depth, 0/*do tRNS*/); - - png_write_info(pp, pi); - - /* Calculate the bit size, divide by 8 to get the byte size - this won't - * overflow because we know the w values are all small enough even for - * a system where 'unsigned int' is only 16 bits. - */ - pixel_size = bit_size(pp, colour_type, bit_depth); - if (png_get_rowbytes(pp, pi) != ((w * pixel_size) + 7) / 8) - png_error(pp, "size row size incorrect"); - - else - { - int npasses = npasses_from_interlace_type(pp, interlace_type); - png_uint_32 y; - int pass; - png_byte image[16][SIZE_ROWMAX]; - - /* To help consistent error detection make the parts of this buffer - * that aren't set below all '1': - */ - memset(image, 0xff, sizeof image); - - if (!do_interlace && - npasses != set_write_interlace_handling(pp, interlace_type)) - png_error(pp, "write: png_set_interlace_handling failed"); - - /* Prepare the whole image first to avoid making it 7 times: */ - for (y=0; y 0) - { - /* Set to all 1's for error detection (libpng tends to - * set unset things to 0). - */ - memset(tempRow, 0xff, sizeof tempRow); - interlace_row(tempRow, row, pixel_size, w, pass, - 0/*data always bigendian*/); - row = tempRow; - } - else - continue; - } - -# ifdef PNG_WRITE_FILTER_SUPPORTED - /* Only get to here if the row has some pixels in it, set the - * filters to 'all' for the very first row and thereafter to a - * single filter. It isn't well documented, but png_set_filter - * does accept a filter number (per the spec) as well as a bit - * mask. - * - * The code now uses filters at random, except that on the first - * row of an image it ensures that a previous row filter is in - * the set so that libpng allocates the row buffer. - */ - { - int filters = 8 << random_mod(PNG_FILTER_VALUE_LAST); - - if (pass == 0 && y == 0 && - (filters < PNG_FILTER_UP || w == 1U)) - filters |= PNG_FILTER_UP; - - png_set_filter(pp, 0/*method*/, filters); - } -# endif - - png_write_row(pp, row); - } - } - } - -#ifdef PNG_TEXT_SUPPORTED - { - static char key[] = "end marker"; - static char comment[] = "end"; - png_text text; - - /* Use a compressed text string to test the correct interaction of text - * compression and IDAT compression. - */ - text.compression = TEXT_COMPRESSION; - text.key = key; - text.text = comment; - text.text_length = (sizeof comment)-1; - text.itxt_length = 0; - text.lang = 0; - text.lang_key = 0; - - png_set_text(pp, pi, &text, 1); - } -#endif - - png_write_end(pp, pi); - - /* And store this under the appropriate id, then clean up. */ - store_storefile(ps, id); - - store_write_reset(ps); - } - - Catch(fault) - { - /* Use the png_store returned by the exception. This may help the compiler - * because 'ps' is not used in this branch of the setjmp. Note that fault - * and ps will always be the same value. - */ - store_write_reset(fault); - } -} - -static void -make_size(png_store* const ps, png_byte const colour_type, int bdlo, - int const bdhi) -{ - for (; bdlo <= bdhi; ++bdlo) - { - png_uint_32 width; - - for (width = 1; width <= 16; ++width) - { - png_uint_32 height; - - for (height = 1; height <= 16; ++height) - { - /* The four combinations of DIY interlace and interlace or not - - * no interlace + DIY should be identical to no interlace with - * libpng doing it. - */ - make_size_image(ps, colour_type, DEPTH(bdlo), PNG_INTERLACE_NONE, - width, height, 0); - make_size_image(ps, colour_type, DEPTH(bdlo), PNG_INTERLACE_NONE, - width, height, 1); -# ifdef PNG_WRITE_INTERLACING_SUPPORTED - make_size_image(ps, colour_type, DEPTH(bdlo), PNG_INTERLACE_ADAM7, - width, height, 0); -# endif -# if CAN_WRITE_INTERLACE - /* 1.7.0 removes the hack that prevented app write of an interlaced - * image if WRITE_INTERLACE was not supported - */ - make_size_image(ps, colour_type, DEPTH(bdlo), PNG_INTERLACE_ADAM7, - width, height, 1); -# endif - } - } - } -} - -static void -make_size_images(png_store *ps) -{ - /* This is in case of errors. */ - safecat(ps->test, sizeof ps->test, 0, "make size images"); - - /* Arguments are colour_type, low bit depth, high bit depth - */ - make_size(ps, 0, 0, WRITE_BDHI); - make_size(ps, 2, 3, WRITE_BDHI); - make_size(ps, 3, 0, 3 /*palette: max 8 bits*/); - make_size(ps, 4, 3, WRITE_BDHI); - make_size(ps, 6, 3, WRITE_BDHI); -} - -#ifdef PNG_READ_SUPPORTED -/* Return a row based on image id and 'y' for checking: */ -static void -standard_row(png_const_structp pp, png_byte std[STANDARD_ROWMAX], - png_uint_32 id, png_uint_32 y) -{ - if (WIDTH_FROM_ID(id) == 0) - transform_row(pp, std, COL_FROM_ID(id), DEPTH_FROM_ID(id), y); - else - size_row(std, WIDTH_FROM_ID(id) * bit_size(pp, COL_FROM_ID(id), - DEPTH_FROM_ID(id)), y); -} -#endif /* PNG_READ_SUPPORTED */ - -/* Tests - individual test cases */ -/* Like 'make_standard' but errors are deliberately introduced into the calls - * to ensure that they get detected - it should not be possible to write an - * invalid image with libpng! - */ -/* TODO: the 'set' functions can probably all be made to take a - * png_const_structp rather than a modifiable one. - */ -#ifdef PNG_WARNINGS_SUPPORTED -static void -sBIT0_error_fn(png_structp pp, png_infop pi) -{ - /* 0 is invalid... */ - png_color_8 bad; - bad.red = bad.green = bad.blue = bad.gray = bad.alpha = 0; - png_set_sBIT(pp, pi, &bad); -} - -static void -sBIT_error_fn(png_structp pp, png_infop pi) -{ - png_byte bit_depth; - png_color_8 bad; - - if (png_get_color_type(pp, pi) == PNG_COLOR_TYPE_PALETTE) - bit_depth = 8; - - else - bit_depth = png_get_bit_depth(pp, pi); - - /* Now we know the bit depth we can easily generate an invalid sBIT entry */ - bad.red = bad.green = bad.blue = bad.gray = bad.alpha = - (png_byte)(bit_depth+1); - png_set_sBIT(pp, pi, &bad); -} - -static const struct -{ - void (*fn)(png_structp, png_infop); - const char *msg; - unsigned int warning :1; /* the error is a warning... */ -} error_test[] = - { - /* no warnings makes these errors undetectable prior to 1.7.0 */ - { sBIT0_error_fn, "sBIT(0): failed to detect error", - PNG_LIBPNG_VER < 10700 }, - - { sBIT_error_fn, "sBIT(too big): failed to detect error", - PNG_LIBPNG_VER < 10700 }, - }; - -static void -make_error(png_store* const ps, png_byte const colour_type, - png_byte bit_depth, int interlace_type, int test, png_const_charp name) -{ - context(ps, fault); - - check_interlace_type(interlace_type); - - Try - { - png_infop pi; - png_structp pp = set_store_for_write(ps, &pi, name); - png_uint_32 w, h; - gnu_volatile(pp) - - if (pp == NULL) - Throw ps; - - w = transform_width(pp, colour_type, bit_depth); - gnu_volatile(w) - h = transform_height(pp, colour_type, bit_depth); - gnu_volatile(h) - png_set_IHDR(pp, pi, w, h, bit_depth, colour_type, interlace_type, - PNG_COMPRESSION_TYPE_BASE, PNG_FILTER_TYPE_BASE); - - if (colour_type == 3) /* palette */ - init_standard_palette(ps, pp, pi, 1U << bit_depth, 0/*do tRNS*/); - - /* Time for a few errors; these are in various optional chunks, the - * standard tests test the standard chunks pretty well. - */ -# define exception__prev exception_prev_1 -# define exception__env exception_env_1 - Try - { - gnu_volatile(exception__prev) - - /* Expect this to throw: */ - ps->expect_error = !error_test[test].warning; - ps->expect_warning = error_test[test].warning; - ps->saw_warning = 0; - error_test[test].fn(pp, pi); - - /* Normally the error is only detected here: */ - png_write_info(pp, pi); - - /* And handle the case where it was only a warning: */ - if (ps->expect_warning && ps->saw_warning) - Throw ps; - - /* If we get here there is a problem, we have success - no error or - * no warning - when we shouldn't have success. Log an error. - */ - store_log(ps, pp, error_test[test].msg, 1 /*error*/); - } - - Catch (fault) - { /* expected exit */ - } -#undef exception__prev -#undef exception__env - - /* And clear these flags */ - ps->expect_warning = 0; - - if (ps->expect_error) - ps->expect_error = 0; - - else - { - /* Now write the whole image, just to make sure that the detected, or - * undetected, error has not created problems inside libpng. This - * doesn't work if there was a png_error in png_write_info because that - * can abort before PLTE was written. - */ - if (png_get_rowbytes(pp, pi) != - transform_rowsize(pp, colour_type, bit_depth)) - png_error(pp, "row size incorrect"); - - else - { - int npasses = set_write_interlace_handling(pp, interlace_type); - int pass; - - if (npasses != npasses_from_interlace_type(pp, interlace_type)) - png_error(pp, "write: png_set_interlace_handling failed"); - - for (pass=0; pass 0) - interlace_row(buffer, buffer, - bit_size(pp, colour_type, bit_depth), w, pass, - 0/*data always bigendian*/); - else - continue; - } -# endif /* do_own_interlace */ - - png_write_row(pp, buffer); - } - } - } /* image writing */ - - png_write_end(pp, pi); - } - - /* The following deletes the file that was just written. */ - store_write_reset(ps); - } - - Catch(fault) - { - store_write_reset(fault); - } -} - -static int -make_errors(png_modifier* const pm, png_byte const colour_type, - int bdlo, int const bdhi) -{ - for (; bdlo <= bdhi; ++bdlo) - { - int interlace_type; - - for (interlace_type = PNG_INTERLACE_NONE; - interlace_type < INTERLACE_LAST; ++interlace_type) - { - unsigned int test; - char name[FILE_NAME_SIZE]; - - standard_name(name, sizeof name, 0, colour_type, 1<this, colour_type, DEPTH(bdlo), interlace_type, - test, name); - - if (fail(pm)) - return 0; - } - } - } - - return 1; /* keep going */ -} -#endif /* PNG_WARNINGS_SUPPORTED */ - -static void -perform_error_test(png_modifier *pm) -{ -#ifdef PNG_WARNINGS_SUPPORTED /* else there are no cases that work! */ - /* Need to do this here because we just write in this test. */ - safecat(pm->this.test, sizeof pm->this.test, 0, "error test"); - - if (!make_errors(pm, 0, 0, WRITE_BDHI)) - return; - - if (!make_errors(pm, 2, 3, WRITE_BDHI)) - return; - - if (!make_errors(pm, 3, 0, 3)) - return; - - if (!make_errors(pm, 4, 3, WRITE_BDHI)) - return; - - if (!make_errors(pm, 6, 3, WRITE_BDHI)) - return; -#else - UNUSED(pm) -#endif -} - -/* This is just to validate the internal PNG formatting code - if this fails - * then the warning messages the library outputs will probably be garbage. - */ -static void -perform_formatting_test(png_store *ps) -{ -#ifdef PNG_TIME_RFC1123_SUPPORTED - /* The handle into the formatting code is the RFC1123 support; this test does - * nothing if that is compiled out. - */ - context(ps, fault); - - Try - { - png_const_charp correct = "29 Aug 2079 13:53:60 +0000"; - png_const_charp result; -# if PNG_LIBPNG_VER >= 10600 - char timestring[29]; -# endif - png_structp pp; - png_time pt; - - pp = set_store_for_write(ps, NULL, "libpng formatting test"); - - if (pp == NULL) - Throw ps; - - - /* Arbitrary settings: */ - pt.year = 2079; - pt.month = 8; - pt.day = 29; - pt.hour = 13; - pt.minute = 53; - pt.second = 60; /* a leap second */ - -# if PNG_LIBPNG_VER < 10600 - result = png_convert_to_rfc1123(pp, &pt); -# else - if (png_convert_to_rfc1123_buffer(timestring, &pt)) - result = timestring; - - else - result = NULL; -# endif - - if (result == NULL) - png_error(pp, "png_convert_to_rfc1123 failed"); - - if (strcmp(result, correct) != 0) - { - size_t pos = 0; - char msg[128]; - - pos = safecat(msg, sizeof msg, pos, "png_convert_to_rfc1123("); - pos = safecat(msg, sizeof msg, pos, correct); - pos = safecat(msg, sizeof msg, pos, ") returned: '"); - pos = safecat(msg, sizeof msg, pos, result); - pos = safecat(msg, sizeof msg, pos, "'"); - - png_error(pp, msg); - } - - store_write_reset(ps); - } - - Catch(fault) - { - store_write_reset(fault); - } -#else - UNUSED(ps) -#endif -} - -#ifdef PNG_READ_SUPPORTED -/* Because we want to use the same code in both the progressive reader and the - * sequential reader it is necessary to deal with the fact that the progressive - * reader callbacks only have one parameter (png_get_progressive_ptr()), so this - * must contain all the test parameters and all the local variables directly - * accessible to the sequential reader implementation. - * - * The technique adopted is to reinvent part of what Dijkstra termed a - * 'display'; an array of pointers to the stack frames of enclosing functions so - * that a nested function definition can access the local (C auto) variables of - * the functions that contain its definition. In fact C provides the first - * pointer (the local variables - the stack frame pointer) and the last (the - * global variables - the BCPL global vector typically implemented as global - * addresses), this code requires one more pointer to make the display - the - * local variables (and function call parameters) of the function that actually - * invokes either the progressive or sequential reader. - * - * Perhaps confusingly this technique is confounded with classes - the - * 'standard_display' defined here is sub-classed as the 'gamma_display' below. - * A gamma_display is a standard_display, taking advantage of the ANSI-C - * requirement that the pointer to the first member of a structure must be the - * same as the pointer to the structure. This allows us to reuse standard_ - * functions in the gamma test code; something that could not be done with - * nested functions! - */ -typedef struct standard_display -{ - png_store* ps; /* Test parameters (passed to the function) */ - png_byte colour_type; - png_byte bit_depth; - png_byte red_sBIT; /* Input data sBIT values. */ - png_byte green_sBIT; - png_byte blue_sBIT; - png_byte alpha_sBIT; - png_byte interlace_type; - png_byte filler; /* Output has a filler */ - png_uint_32 id; /* Calculated file ID */ - png_uint_32 w; /* Width of image */ - png_uint_32 h; /* Height of image */ - int npasses; /* Number of interlaced passes */ - png_uint_32 pixel_size; /* Width of one pixel in bits */ - png_uint_32 bit_width; /* Width of output row in bits */ - size_t cbRow; /* Bytes in a row of the output image */ - int do_interlace; /* Do interlacing internally */ - int littleendian; /* App (row) data is little endian */ - int is_transparent; /* Transparency information was present. */ - int has_tRNS; /* color type GRAY or RGB with a tRNS chunk. */ - int speed; /* Doing a speed test */ - int use_update_info;/* Call update_info, not start_image */ - struct - { - png_uint_16 red; - png_uint_16 green; - png_uint_16 blue; - } transparent; /* The transparent color, if set. */ - int npalette; /* Number of entries in the palette. */ - store_palette - palette; -} standard_display; - -static void -standard_display_init(standard_display *dp, png_store* ps, png_uint_32 id, - int do_interlace, int use_update_info) -{ - memset(dp, 0, sizeof *dp); - - dp->ps = ps; - dp->colour_type = COL_FROM_ID(id); - dp->bit_depth = DEPTH_FROM_ID(id); - if (dp->bit_depth < 1 || dp->bit_depth > 16) - internal_error(ps, "internal: bad bit depth"); - if (dp->colour_type == 3) - dp->red_sBIT = dp->blue_sBIT = dp->green_sBIT = dp->alpha_sBIT = 8; - else - dp->red_sBIT = dp->blue_sBIT = dp->green_sBIT = dp->alpha_sBIT = - dp->bit_depth; - dp->interlace_type = INTERLACE_FROM_ID(id); - check_interlace_type(dp->interlace_type); - dp->id = id; - /* All the rest are filled in after the read_info: */ - dp->w = 0; - dp->h = 0; - dp->npasses = 0; - dp->pixel_size = 0; - dp->bit_width = 0; - dp->cbRow = 0; - dp->do_interlace = do_interlace; - dp->littleendian = 0; - dp->is_transparent = 0; - dp->speed = ps->speed; - dp->use_update_info = use_update_info; - dp->npalette = 0; - /* Preset the transparent color to black: */ - memset(&dp->transparent, 0, sizeof dp->transparent); - /* Preset the palette to full intensity/opaque throughout: */ - memset(dp->palette, 0xff, sizeof dp->palette); -} - -/* Initialize the palette fields - this must be done later because the palette - * comes from the particular png_store_file that is selected. - */ -static void -standard_palette_init(standard_display *dp) -{ - store_palette_entry *palette = store_current_palette(dp->ps, &dp->npalette); - - /* The remaining entries remain white/opaque. */ - if (dp->npalette > 0) - { - int i = dp->npalette; - memcpy(dp->palette, palette, i * sizeof *palette); - - /* Check for a non-opaque palette entry: */ - while (--i >= 0) - if (palette[i].alpha < 255) - break; - -# ifdef __GNUC__ - /* GCC can't handle the more obviously optimizable version. */ - if (i >= 0) - dp->is_transparent = 1; - else - dp->is_transparent = 0; -# else - dp->is_transparent = (i >= 0); -# endif - } -} - -/* Utility to read the palette from the PNG file and convert it into - * store_palette format. This returns 1 if there is any transparency in the - * palette (it does not check for a transparent colour in the non-palette case.) - */ -static int -read_palette(store_palette palette, int *npalette, png_const_structp pp, - png_infop pi) -{ - png_colorp pal; - png_bytep trans_alpha; - int num; - - pal = 0; - *npalette = -1; - - if (png_get_PLTE(pp, pi, &pal, npalette) & PNG_INFO_PLTE) - { - int i = *npalette; - - if (i <= 0 || i > 256) - png_error(pp, "validate: invalid PLTE count"); - - while (--i >= 0) - { - palette[i].red = pal[i].red; - palette[i].green = pal[i].green; - palette[i].blue = pal[i].blue; - } - - /* Mark the remainder of the entries with a flag value (other than - * white/opaque which is the flag value stored above.) - */ - memset(palette + *npalette, 126, (256-*npalette) * sizeof *palette); - } - - else /* !png_get_PLTE */ - { - if (*npalette != (-1)) - png_error(pp, "validate: invalid PLTE result"); - /* But there is no palette, so record this: */ - *npalette = 0; - memset(palette, 113, sizeof (store_palette)); - } - - trans_alpha = 0; - num = 2; /* force error below */ - if ((png_get_tRNS(pp, pi, &trans_alpha, &num, 0) & PNG_INFO_tRNS) != 0 && - (trans_alpha != NULL || num != 1/*returns 1 for a transparent color*/) && - /* Oops, if a palette tRNS gets expanded png_read_update_info (at least so - * far as 1.5.4) does not remove the trans_alpha pointer, only num_trans, - * so in the above call we get a success, we get a pointer (who knows what - * to) and we get num_trans == 0: - */ - !(trans_alpha != NULL && num == 0)) /* TODO: fix this in libpng. */ - { - int i; - - /* Any of these are crash-worthy - given the implementation of - * png_get_tRNS up to 1.5 an app won't crash if it just checks the - * result above and fails to check that the variables it passed have - * actually been filled in! Note that if the app were to pass the - * last, png_color_16p, variable too it couldn't rely on this. - */ - if (trans_alpha == NULL || num <= 0 || num > 256 || num > *npalette) - png_error(pp, "validate: unexpected png_get_tRNS (palette) result"); - - for (i=0; iis_transparent) - png_error(pp, "validate: palette transparency changed"); - - if (npalette != dp->npalette) - { - size_t pos = 0; - char msg[64]; - - pos = safecat(msg, sizeof msg, pos, "validate: palette size changed: "); - pos = safecatn(msg, sizeof msg, pos, dp->npalette); - pos = safecat(msg, sizeof msg, pos, " -> "); - pos = safecatn(msg, sizeof msg, pos, npalette); - png_error(pp, msg); - } - - { - int i = npalette; /* npalette is aliased */ - - while (--i >= 0) - if (palette[i].red != dp->palette[i].red || - palette[i].green != dp->palette[i].green || - palette[i].blue != dp->palette[i].blue || - palette[i].alpha != dp->palette[i].alpha) - png_error(pp, "validate: PLTE or tRNS chunk changed"); - } -} - -/* By passing a 'standard_display' the progressive callbacks can be used - * directly by the sequential code, the functions suffixed "_imp" are the - * implementations, the functions without the suffix are the callbacks. - * - * The code for the info callback is split into two because this callback calls - * png_read_update_info or png_start_read_image and what gets called depends on - * whether the info needs updating (we want to test both calls in pngvalid.) - */ -static void -standard_info_part1(standard_display *dp, png_structp pp, png_infop pi) -{ - if (png_get_bit_depth(pp, pi) != dp->bit_depth) - png_error(pp, "validate: bit depth changed"); - - if (png_get_color_type(pp, pi) != dp->colour_type) - png_error(pp, "validate: color type changed"); - - if (png_get_filter_type(pp, pi) != PNG_FILTER_TYPE_BASE) - png_error(pp, "validate: filter type changed"); - - if (png_get_interlace_type(pp, pi) != dp->interlace_type) - png_error(pp, "validate: interlacing changed"); - - if (png_get_compression_type(pp, pi) != PNG_COMPRESSION_TYPE_BASE) - png_error(pp, "validate: compression type changed"); - - dp->w = png_get_image_width(pp, pi); - - if (dp->w != standard_width(pp, dp->id)) - png_error(pp, "validate: image width changed"); - - dp->h = png_get_image_height(pp, pi); - - if (dp->h != standard_height(pp, dp->id)) - png_error(pp, "validate: image height changed"); - - /* Record (but don't check at present) the input sBIT according to the colour - * type information. - */ - { - png_color_8p sBIT = 0; - - if (png_get_sBIT(pp, pi, &sBIT) & PNG_INFO_sBIT) - { - int sBIT_invalid = 0; - - if (sBIT == 0) - png_error(pp, "validate: unexpected png_get_sBIT result"); - - if (dp->colour_type & PNG_COLOR_MASK_COLOR) - { - if (sBIT->red == 0 || sBIT->red > dp->bit_depth) - sBIT_invalid = 1; - else - dp->red_sBIT = sBIT->red; - - if (sBIT->green == 0 || sBIT->green > dp->bit_depth) - sBIT_invalid = 1; - else - dp->green_sBIT = sBIT->green; - - if (sBIT->blue == 0 || sBIT->blue > dp->bit_depth) - sBIT_invalid = 1; - else - dp->blue_sBIT = sBIT->blue; - } - - else /* !COLOR */ - { - if (sBIT->gray == 0 || sBIT->gray > dp->bit_depth) - sBIT_invalid = 1; - else - dp->blue_sBIT = dp->green_sBIT = dp->red_sBIT = sBIT->gray; - } - - /* All 8 bits in tRNS for a palette image are significant - see the - * spec. - */ - if (dp->colour_type & PNG_COLOR_MASK_ALPHA) - { - if (sBIT->alpha == 0 || sBIT->alpha > dp->bit_depth) - sBIT_invalid = 1; - else - dp->alpha_sBIT = sBIT->alpha; - } - - if (sBIT_invalid) - png_error(pp, "validate: sBIT value out of range"); - } - } - - /* Important: this is validating the value *before* any transforms have been - * put in place. It doesn't matter for the standard tests, where there are - * no transforms, but it does for other tests where rowbytes may change after - * png_read_update_info. - */ - if (png_get_rowbytes(pp, pi) != standard_rowsize(pp, dp->id)) - png_error(pp, "validate: row size changed"); - - /* Validate the colour type 3 palette (this can be present on other color - * types.) - */ - standard_palette_validate(dp, pp, pi); - - /* In any case always check for a transparent color (notice that the - * colour type 3 case must not give a successful return on the get_tRNS call - * with these arguments!) - */ - { - png_color_16p trans_color = 0; - - if (png_get_tRNS(pp, pi, 0, 0, &trans_color) & PNG_INFO_tRNS) - { - if (trans_color == 0) - png_error(pp, "validate: unexpected png_get_tRNS (color) result"); - - switch (dp->colour_type) - { - case 0: - dp->transparent.red = dp->transparent.green = dp->transparent.blue = - trans_color->gray; - dp->has_tRNS = 1; - break; - - case 2: - dp->transparent.red = trans_color->red; - dp->transparent.green = trans_color->green; - dp->transparent.blue = trans_color->blue; - dp->has_tRNS = 1; - break; - - case 3: - /* Not expected because it should result in the array case - * above. - */ - png_error(pp, "validate: unexpected png_get_tRNS result"); - break; - - default: - png_error(pp, "validate: invalid tRNS chunk with alpha image"); - } - } - } - - /* Read the number of passes - expected to match the value used when - * creating the image (interlaced or not). This has the side effect of - * turning on interlace handling (if do_interlace is not set.) - */ - dp->npasses = npasses_from_interlace_type(pp, dp->interlace_type); - if (!dp->do_interlace) - { -# ifdef PNG_READ_INTERLACING_SUPPORTED - if (dp->npasses != png_set_interlace_handling(pp)) - png_error(pp, "validate: file changed interlace type"); -# else /* !READ_INTERLACING */ - /* This should never happen: the relevant tests (!do_interlace) should - * not be run. - */ - if (dp->npasses > 1) - png_error(pp, "validate: no libpng interlace support"); -# endif /* !READ_INTERLACING */ - } - - /* Caller calls png_read_update_info or png_start_read_image now, then calls - * part2. - */ -} - -/* This must be called *after* the png_read_update_info call to get the correct - * 'rowbytes' value, otherwise png_get_rowbytes will refer to the untransformed - * image. - */ -static void -standard_info_part2(standard_display *dp, png_const_structp pp, - png_const_infop pi, int nImages) -{ - /* Record cbRow now that it can be found. */ - { - png_byte ct = png_get_color_type(pp, pi); - png_byte bd = png_get_bit_depth(pp, pi); - - if (bd >= 8 && (ct == PNG_COLOR_TYPE_RGB || ct == PNG_COLOR_TYPE_GRAY) && - dp->filler) - ct |= 4; /* handle filler as faked alpha channel */ - - dp->pixel_size = bit_size(pp, ct, bd); - } - dp->bit_width = png_get_image_width(pp, pi) * dp->pixel_size; - dp->cbRow = png_get_rowbytes(pp, pi); - - /* Validate the rowbytes here again. */ - if (dp->cbRow != (dp->bit_width+7)/8) - png_error(pp, "bad png_get_rowbytes calculation"); - - /* Then ensure there is enough space for the output image(s). */ - store_ensure_image(dp->ps, pp, nImages, dp->cbRow, dp->h); -} - -static void -standard_info_imp(standard_display *dp, png_structp pp, png_infop pi, - int nImages) -{ - /* Note that the validation routine has the side effect of turning on - * interlace handling in the subsequent code. - */ - standard_info_part1(dp, pp, pi); - - /* And the info callback has to call this (or png_read_update_info - see - * below in the png_modifier code for that variant. - */ - if (dp->use_update_info) - { - /* For debugging the effect of multiple calls: */ - int i = dp->use_update_info; - while (i-- > 0) - png_read_update_info(pp, pi); - } - - else - png_start_read_image(pp); - - /* Validate the height, width and rowbytes plus ensure that sufficient buffer - * exists for decoding the image. - */ - standard_info_part2(dp, pp, pi, nImages); -} - -static void PNGCBAPI -standard_info(png_structp pp, png_infop pi) -{ - standard_display *dp = voidcast(standard_display*, - png_get_progressive_ptr(pp)); - - /* Call with nImages==1 because the progressive reader can only produce one - * image. - */ - standard_info_imp(dp, pp, pi, 1 /*only one image*/); -} - -static void PNGCBAPI -progressive_row(png_structp ppIn, png_bytep new_row, png_uint_32 y, int pass) -{ - png_const_structp pp = ppIn; - const standard_display *dp = voidcast(standard_display*, - png_get_progressive_ptr(pp)); - - /* When handling interlacing some rows will be absent in each pass, the - * callback still gets called, but with a NULL pointer. This is checked - * in the 'else' clause below. We need our own 'cbRow', but we can't call - * png_get_rowbytes because we got no info structure. - */ - if (new_row != NULL) - { - png_bytep row; - - /* In the case where the reader doesn't do the interlace it gives - * us the y in the sub-image: - */ - if (dp->do_interlace && dp->interlace_type == PNG_INTERLACE_ADAM7) - { -#ifdef PNG_USER_TRANSFORM_INFO_SUPPORTED - /* Use this opportunity to validate the png 'current' APIs: */ - if (y != png_get_current_row_number(pp)) - png_error(pp, "png_get_current_row_number is broken"); - - if (pass != png_get_current_pass_number(pp)) - png_error(pp, "png_get_current_pass_number is broken"); -#endif /* USER_TRANSFORM_INFO */ - - y = PNG_ROW_FROM_PASS_ROW(y, pass); - } - - /* Validate this just in case. */ - if (y >= dp->h) - png_error(pp, "invalid y to progressive row callback"); - - row = store_image_row(dp->ps, pp, 0, y); - - /* Combine the new row into the old: */ -#ifdef PNG_READ_INTERLACING_SUPPORTED - if (dp->do_interlace) -#endif /* READ_INTERLACING */ - { - if (dp->interlace_type == PNG_INTERLACE_ADAM7) - deinterlace_row(row, new_row, dp->pixel_size, dp->w, pass, - dp->littleendian); - else - row_copy(row, new_row, dp->pixel_size * dp->w, dp->littleendian); - } -#ifdef PNG_READ_INTERLACING_SUPPORTED - else - png_progressive_combine_row(pp, row, new_row); -#endif /* PNG_READ_INTERLACING_SUPPORTED */ - } - - else if (dp->interlace_type == PNG_INTERLACE_ADAM7 && - PNG_ROW_IN_INTERLACE_PASS(y, pass) && - PNG_PASS_COLS(dp->w, pass) > 0) - png_error(pp, "missing row in progressive de-interlacing"); -} - -static void -sequential_row(standard_display *dp, png_structp pp, png_infop pi, - int iImage, int iDisplay) -{ - int npasses = dp->npasses; - int do_interlace = dp->do_interlace && - dp->interlace_type == PNG_INTERLACE_ADAM7; - png_uint_32 height = standard_height(pp, dp->id); - png_uint_32 width = standard_width(pp, dp->id); - const png_store* ps = dp->ps; - int pass; - - for (pass=0; pass 0 && PNG_ROW_IN_INTERLACE_PASS(y, pass)) - { - /* Read the row into a pair of temporary buffers, then do the - * merge here into the output rows. - */ - png_byte row[STANDARD_ROWMAX], display[STANDARD_ROWMAX]; - - /* The following aids (to some extent) error detection - we can - * see where png_read_row wrote. Use opposite values in row and - * display to make this easier. Don't use 0xff (which is used in - * the image write code to fill unused bits) or 0 (which is a - * likely value to overwrite unused bits with). - */ - memset(row, 0xc5, sizeof row); - memset(display, 0x5c, sizeof display); - - png_read_row(pp, row, display); - - if (iImage >= 0) - deinterlace_row(store_image_row(ps, pp, iImage, y), row, - dp->pixel_size, dp->w, pass, dp->littleendian); - - if (iDisplay >= 0) - deinterlace_row(store_image_row(ps, pp, iDisplay, y), display, - dp->pixel_size, dp->w, pass, dp->littleendian); - } - } - else - png_read_row(pp, - iImage >= 0 ? store_image_row(ps, pp, iImage, y) : NULL, - iDisplay >= 0 ? store_image_row(ps, pp, iDisplay, y) : NULL); - } - } - - /* And finish the read operation (only really necessary if the caller wants - * to find additional data in png_info from chunks after the last IDAT.) - */ - png_read_end(pp, pi); -} - -#ifdef PNG_TEXT_SUPPORTED -static void -standard_check_text(png_const_structp pp, png_const_textp tp, - png_const_charp keyword, png_const_charp text) -{ - char msg[1024]; - size_t pos = safecat(msg, sizeof msg, 0, "text: "); - size_t ok; - - pos = safecat(msg, sizeof msg, pos, keyword); - pos = safecat(msg, sizeof msg, pos, ": "); - ok = pos; - - if (tp->compression != TEXT_COMPRESSION) - { - char buf[64]; - - sprintf(buf, "compression [%d->%d], ", TEXT_COMPRESSION, - tp->compression); - pos = safecat(msg, sizeof msg, pos, buf); - } - - if (tp->key == NULL || strcmp(tp->key, keyword) != 0) - { - pos = safecat(msg, sizeof msg, pos, "keyword \""); - if (tp->key != NULL) - { - pos = safecat(msg, sizeof msg, pos, tp->key); - pos = safecat(msg, sizeof msg, pos, "\", "); - } - - else - pos = safecat(msg, sizeof msg, pos, "null, "); - } - - if (tp->text == NULL) - pos = safecat(msg, sizeof msg, pos, "text lost, "); - - else - { - if (tp->text_length != strlen(text)) - { - char buf[64]; - sprintf(buf, "text length changed[%lu->%lu], ", - (unsigned long)strlen(text), (unsigned long)tp->text_length); - pos = safecat(msg, sizeof msg, pos, buf); - } - - if (strcmp(tp->text, text) != 0) - { - pos = safecat(msg, sizeof msg, pos, "text becomes \""); - pos = safecat(msg, sizeof msg, pos, tp->text); - pos = safecat(msg, sizeof msg, pos, "\" (was \""); - pos = safecat(msg, sizeof msg, pos, text); - pos = safecat(msg, sizeof msg, pos, "\"), "); - } - } - - if (tp->itxt_length != 0) - pos = safecat(msg, sizeof msg, pos, "iTXt length set, "); - - if (tp->lang != NULL) - { - pos = safecat(msg, sizeof msg, pos, "iTXt language \""); - pos = safecat(msg, sizeof msg, pos, tp->lang); - pos = safecat(msg, sizeof msg, pos, "\", "); - } - - if (tp->lang_key != NULL) - { - pos = safecat(msg, sizeof msg, pos, "iTXt keyword \""); - pos = safecat(msg, sizeof msg, pos, tp->lang_key); - pos = safecat(msg, sizeof msg, pos, "\", "); - } - - if (pos > ok) - { - msg[pos-2] = '\0'; /* Remove the ", " at the end */ - png_error(pp, msg); - } -} - -static void -standard_text_validate(standard_display *dp, png_const_structp pp, - png_infop pi, int check_end) -{ - png_textp tp = NULL; - png_uint_32 num_text = png_get_text(pp, pi, &tp, NULL); - - if (num_text == 2 && tp != NULL) - { - standard_check_text(pp, tp, "image name", dp->ps->current->name); - - /* This exists because prior to 1.5.18 the progressive reader left the - * png_struct z_stream unreset at the end of the image, so subsequent - * attempts to use it simply returns Z_STREAM_END. - */ - if (check_end) - standard_check_text(pp, tp+1, "end marker", "end"); - } - - else - { - char msg[64]; - - sprintf(msg, "expected two text items, got %lu", - (unsigned long)num_text); - png_error(pp, msg); - } -} -#else -# define standard_text_validate(dp,pp,pi,check_end) ((void)0) -#endif - -static void -standard_row_validate(standard_display *dp, png_const_structp pp, - int iImage, int iDisplay, png_uint_32 y) -{ - int where; - png_byte std[STANDARD_ROWMAX]; - - /* The row must be pre-initialized to the magic number here for the size - * tests to pass: - */ - memset(std, 178, sizeof std); - standard_row(pp, std, dp->id, y); - - /* At the end both the 'row' and 'display' arrays should end up identical. - * In earlier passes 'row' will be partially filled in, with only the pixels - * that have been read so far, but 'display' will have those pixels - * replicated to fill the unread pixels while reading an interlaced image. - */ - if (iImage >= 0 && - (where = pixel_cmp(std, store_image_row(dp->ps, pp, iImage, y), - dp->bit_width)) != 0) - { - char msg[64]; - sprintf(msg, "PNG image row[%lu][%d] changed from %.2x to %.2x", - (unsigned long)y, where-1, std[where-1], - store_image_row(dp->ps, pp, iImage, y)[where-1]); - png_error(pp, msg); - } - - if (iDisplay >= 0 && - (where = pixel_cmp(std, store_image_row(dp->ps, pp, iDisplay, y), - dp->bit_width)) != 0) - { - char msg[64]; - sprintf(msg, "display row[%lu][%d] changed from %.2x to %.2x", - (unsigned long)y, where-1, std[where-1], - store_image_row(dp->ps, pp, iDisplay, y)[where-1]); - png_error(pp, msg); - } -} - -static void -standard_image_validate(standard_display *dp, png_const_structp pp, int iImage, - int iDisplay) -{ - png_uint_32 y; - - if (iImage >= 0) - store_image_check(dp->ps, pp, iImage); - - if (iDisplay >= 0) - store_image_check(dp->ps, pp, iDisplay); - - for (y=0; yh; ++y) - standard_row_validate(dp, pp, iImage, iDisplay, y); - - /* This avoids false positives if the validation code is never called! */ - dp->ps->validated = 1; -} - -static void PNGCBAPI -standard_end(png_structp ppIn, png_infop pi) -{ - png_const_structp pp = ppIn; - standard_display *dp = voidcast(standard_display*, - png_get_progressive_ptr(pp)); - - UNUSED(pi) - - /* Validate the image - progressive reading only produces one variant for - * interlaced images. - */ - standard_text_validate(dp, pp, pi, - PNG_LIBPNG_VER >= 10518/*check_end: see comments above*/); - standard_image_validate(dp, pp, 0, -1); -} - -/* A single test run checking the standard image to ensure it is not damaged. */ -static void -standard_test(png_store* const psIn, png_uint_32 const id, - int do_interlace, int use_update_info) -{ - standard_display d; - context(psIn, fault); - - /* Set up the display (stack frame) variables from the arguments to the - * function and initialize the locals that are filled in later. - */ - standard_display_init(&d, psIn, id, do_interlace, use_update_info); - - /* Everything is protected by a Try/Catch. The functions called also - * typically have local Try/Catch blocks. - */ - Try - { - png_structp pp; - png_infop pi; - - /* Get a png_struct for reading the image. This will throw an error if it - * fails, so we don't need to check the result. - */ - pp = set_store_for_read(d.ps, &pi, d.id, - d.do_interlace ? (d.ps->progressive ? - "pngvalid progressive deinterlacer" : - "pngvalid sequential deinterlacer") : (d.ps->progressive ? - "progressive reader" : "sequential reader")); - - /* Initialize the palette correctly from the png_store_file. */ - standard_palette_init(&d); - - /* Introduce the correct read function. */ - if (d.ps->progressive) - { - png_set_progressive_read_fn(pp, &d, standard_info, progressive_row, - standard_end); - - /* Now feed data into the reader until we reach the end: */ - store_progressive_read(d.ps, pp, pi); - } - else - { - /* Note that this takes the store, not the display. */ - png_set_read_fn(pp, d.ps, store_read); - - /* Check the header values: */ - png_read_info(pp, pi); - - /* The code tests both versions of the images that the sequential - * reader can produce. - */ - standard_info_imp(&d, pp, pi, 2 /*images*/); - - /* Need the total bytes in the image below; we can't get to this point - * unless the PNG file values have been checked against the expected - * values. - */ - { - sequential_row(&d, pp, pi, 0, 1); - - /* After the last pass loop over the rows again to check that the - * image is correct. - */ - if (!d.speed) - { - standard_text_validate(&d, pp, pi, 1/*check_end*/); - standard_image_validate(&d, pp, 0, 1); - } - else - d.ps->validated = 1; - } - } - - /* Check for validation. */ - if (!d.ps->validated) - png_error(pp, "image read failed silently"); - - /* Successful completion. */ - } - - Catch(fault) - d.ps = fault; /* make sure this hasn't been clobbered. */ - - /* In either case clean up the store. */ - store_read_reset(d.ps); -} - -static int -test_standard(png_modifier* const pm, png_byte const colour_type, - int bdlo, int const bdhi) -{ - for (; bdlo <= bdhi; ++bdlo) - { - int interlace_type; - - for (interlace_type = PNG_INTERLACE_NONE; - interlace_type < INTERLACE_LAST; ++interlace_type) - { - standard_test(&pm->this, FILEID(colour_type, DEPTH(bdlo), 0/*palette*/, - interlace_type, 0, 0, 0), do_read_interlace, pm->use_update_info); - - if (fail(pm)) - return 0; - } - } - - return 1; /* keep going */ -} - -static void -perform_standard_test(png_modifier *pm) -{ - /* Test each colour type over the valid range of bit depths (expressed as - * log2(bit_depth) in turn, stop as soon as any error is detected. - */ - if (!test_standard(pm, 0, 0, READ_BDHI)) - return; - - if (!test_standard(pm, 2, 3, READ_BDHI)) - return; - - if (!test_standard(pm, 3, 0, 3)) - return; - - if (!test_standard(pm, 4, 3, READ_BDHI)) - return; - - if (!test_standard(pm, 6, 3, READ_BDHI)) - return; -} - - -/********************************** SIZE TESTS ********************************/ -static int -test_size(png_modifier* const pm, png_byte const colour_type, - int bdlo, int const bdhi) -{ - /* Run the tests on each combination. - * - * NOTE: on my 32 bit x86 each of the following blocks takes - * a total of 3.5 seconds if done across every combo of bit depth - * width and height. This is a waste of time in practice, hence the - * hinc and winc stuff: - */ - static const png_byte hinc[] = {1, 3, 11, 1, 5}; - static const png_byte winc[] = {1, 9, 5, 7, 1}; - int save_bdlo = bdlo; - - for (; bdlo <= bdhi; ++bdlo) - { - png_uint_32 h, w; - - for (h=1; h<=16; h+=hinc[bdlo]) for (w=1; w<=16; w+=winc[bdlo]) - { - /* First test all the 'size' images against the sequential - * reader using libpng to deinterlace (where required.) This - * validates the write side of libpng. There are four possibilities - * to validate. - */ - standard_test(&pm->this, FILEID(colour_type, DEPTH(bdlo), 0/*palette*/, - PNG_INTERLACE_NONE, w, h, 0), 0/*do_interlace*/, - pm->use_update_info); - - if (fail(pm)) - return 0; - - standard_test(&pm->this, FILEID(colour_type, DEPTH(bdlo), 0/*palette*/, - PNG_INTERLACE_NONE, w, h, 1), 0/*do_interlace*/, - pm->use_update_info); - - if (fail(pm)) - return 0; - - /* Now validate the interlaced read side - do_interlace true, - * in the progressive case this does actually make a difference - * to the code used in the non-interlaced case too. - */ - standard_test(&pm->this, FILEID(colour_type, DEPTH(bdlo), 0/*palette*/, - PNG_INTERLACE_NONE, w, h, 0), 1/*do_interlace*/, - pm->use_update_info); - - if (fail(pm)) - return 0; - -# if CAN_WRITE_INTERLACE - /* Validate the pngvalid code itself: */ - standard_test(&pm->this, FILEID(colour_type, DEPTH(bdlo), 0/*palette*/, - PNG_INTERLACE_ADAM7, w, h, 1), 1/*do_interlace*/, - pm->use_update_info); - - if (fail(pm)) - return 0; -# endif - } - } - - /* Now do the tests of libpng interlace handling, after we have made sure - * that the pngvalid version works: - */ - for (bdlo = save_bdlo; bdlo <= bdhi; ++bdlo) - { - png_uint_32 h, w; - - for (h=1; h<=16; h+=hinc[bdlo]) for (w=1; w<=16; w+=winc[bdlo]) - { -# ifdef PNG_READ_INTERLACING_SUPPORTED - /* Test with pngvalid generated interlaced images first; we have - * already verify these are ok (unless pngvalid has self-consistent - * read/write errors, which is unlikely), so this detects errors in the - * read side first: - */ -# if CAN_WRITE_INTERLACE - standard_test(&pm->this, FILEID(colour_type, DEPTH(bdlo), 0/*palette*/, - PNG_INTERLACE_ADAM7, w, h, 1), 0/*do_interlace*/, - pm->use_update_info); - - if (fail(pm)) - return 0; -# endif -# endif /* READ_INTERLACING */ - -# ifdef PNG_WRITE_INTERLACING_SUPPORTED - /* Test the libpng write side against the pngvalid read side: */ - standard_test(&pm->this, FILEID(colour_type, DEPTH(bdlo), 0/*palette*/, - PNG_INTERLACE_ADAM7, w, h, 0), 1/*do_interlace*/, - pm->use_update_info); - - if (fail(pm)) - return 0; -# endif - -# ifdef PNG_READ_INTERLACING_SUPPORTED -# ifdef PNG_WRITE_INTERLACING_SUPPORTED - /* Test both together: */ - standard_test(&pm->this, FILEID(colour_type, DEPTH(bdlo), 0/*palette*/, - PNG_INTERLACE_ADAM7, w, h, 0), 0/*do_interlace*/, - pm->use_update_info); - - if (fail(pm)) - return 0; -# endif -# endif /* READ_INTERLACING */ - } - } - - return 1; /* keep going */ -} - -static void -perform_size_test(png_modifier *pm) -{ - /* Test each colour type over the valid range of bit depths (expressed as - * log2(bit_depth) in turn, stop as soon as any error is detected. - */ - if (!test_size(pm, 0, 0, READ_BDHI)) - return; - - if (!test_size(pm, 2, 3, READ_BDHI)) - return; - - /* For the moment don't do the palette test - it's a waste of time when - * compared to the grayscale test. - */ -#if 0 - if (!test_size(pm, 3, 0, 3)) - return; -#endif - - if (!test_size(pm, 4, 3, READ_BDHI)) - return; - - if (!test_size(pm, 6, 3, READ_BDHI)) - return; -} - - -/******************************* TRANSFORM TESTS ******************************/ -#ifdef PNG_READ_TRANSFORMS_SUPPORTED -/* A set of tests to validate libpng image transforms. The possibilities here - * are legion because the transforms can be combined in a combinatorial - * fashion. To deal with this some measure of restraint is required, otherwise - * the tests would take forever. - */ -typedef struct image_pixel -{ - /* A local (pngvalid) representation of a PNG pixel, in all its - * various forms. - */ - unsigned int red, green, blue, alpha; /* For non-palette images. */ - unsigned int palette_index; /* For a palette image. */ - png_byte colour_type; /* As in the spec. */ - png_byte bit_depth; /* Defines bit size in row */ - png_byte sample_depth; /* Scale of samples */ - unsigned int have_tRNS :1; /* tRNS chunk may need processing */ - unsigned int swap_rgb :1; /* RGB swapped to BGR */ - unsigned int alpha_first :1; /* Alpha at start, not end */ - unsigned int alpha_inverted :1; /* Alpha channel inverted */ - unsigned int mono_inverted :1; /* Gray channel inverted */ - unsigned int swap16 :1; /* Byte swap 16-bit components */ - unsigned int littleendian :1; /* High bits on right */ - unsigned int sig_bits :1; /* Pixel shifted (sig bits only) */ - - /* For checking the code calculates double precision floating point values - * along with an error value, accumulated from the transforms. Because an - * sBIT setting allows larger error bounds (indeed, by the spec, apparently - * up to just less than +/-1 in the scaled value) the *lowest* sBIT for each - * channel is stored. This sBIT value is folded in to the stored error value - * at the end of the application of the transforms to the pixel. - * - * If sig_bits is set above the red, green, blue and alpha values have been - * scaled so they only contain the significant bits of the component values. - */ - double redf, greenf, bluef, alphaf; - double rede, greene, bluee, alphae; - png_byte red_sBIT, green_sBIT, blue_sBIT, alpha_sBIT; -} image_pixel; - -/* Shared utility function, see below. */ -static void -image_pixel_setf(image_pixel *this, unsigned int rMax, unsigned int gMax, - unsigned int bMax, unsigned int aMax) -{ - this->redf = this->red / (double)rMax; - this->greenf = this->green / (double)gMax; - this->bluef = this->blue / (double)bMax; - this->alphaf = this->alpha / (double)aMax; - - if (this->red < rMax) - this->rede = this->redf * DBL_EPSILON; - else - this->rede = 0; - if (this->green < gMax) - this->greene = this->greenf * DBL_EPSILON; - else - this->greene = 0; - if (this->blue < bMax) - this->bluee = this->bluef * DBL_EPSILON; - else - this->bluee = 0; - if (this->alpha < aMax) - this->alphae = this->alphaf * DBL_EPSILON; - else - this->alphae = 0; -} - -/* Initialize the structure for the next pixel - call this before doing any - * transforms and call it for each pixel since all the fields may need to be - * reset. - */ -static void -image_pixel_init(image_pixel *this, png_const_bytep row, png_byte colour_type, - png_byte bit_depth, png_uint_32 x, store_palette palette, - const image_pixel *format /*from pngvalid transform of input*/) -{ - png_byte sample_depth = - (png_byte)(colour_type == PNG_COLOR_TYPE_PALETTE ? 8 : bit_depth); - unsigned int max = (1U<swap16); - int littleendian = (format != 0 && format->littleendian); - int sig_bits = (format != 0 && format->sig_bits); - - /* Initially just set everything to the same number and the alpha to opaque. - * Note that this currently assumes a simple palette where entry x has colour - * rgb(x,x,x)! - */ - this->palette_index = this->red = this->green = this->blue = - sample(row, colour_type, bit_depth, x, 0, swap16, littleendian); - this->alpha = max; - this->red_sBIT = this->green_sBIT = this->blue_sBIT = this->alpha_sBIT = - sample_depth; - - /* Then override as appropriate: */ - if (colour_type == 3) /* palette */ - { - /* This permits the caller to default to the sample value. */ - if (palette != 0) - { - unsigned int i = this->palette_index; - - this->red = palette[i].red; - this->green = palette[i].green; - this->blue = palette[i].blue; - this->alpha = palette[i].alpha; - } - } - - else /* not palette */ - { - unsigned int i = 0; - - if ((colour_type & 4) != 0 && format != 0 && format->alpha_first) - { - this->alpha = this->red; - /* This handles the gray case for 'AG' pixels */ - this->palette_index = this->red = this->green = this->blue = - sample(row, colour_type, bit_depth, x, 1, swap16, littleendian); - i = 1; - } - - if (colour_type & 2) - { - /* Green is second for both BGR and RGB: */ - this->green = sample(row, colour_type, bit_depth, x, ++i, swap16, - littleendian); - - if (format != 0 && format->swap_rgb) /* BGR */ - this->red = sample(row, colour_type, bit_depth, x, ++i, swap16, - littleendian); - else - this->blue = sample(row, colour_type, bit_depth, x, ++i, swap16, - littleendian); - } - - else /* grayscale */ if (format != 0 && format->mono_inverted) - this->red = this->green = this->blue = this->red ^ max; - - if ((colour_type & 4) != 0) /* alpha */ - { - if (format == 0 || !format->alpha_first) - this->alpha = sample(row, colour_type, bit_depth, x, ++i, swap16, - littleendian); - - if (format != 0 && format->alpha_inverted) - this->alpha ^= max; - } - } - - /* Calculate the scaled values, these are simply the values divided by - * 'max' and the error is initialized to the double precision epsilon value - * from the header file. - */ - image_pixel_setf(this, - sig_bits ? (1U << format->red_sBIT)-1 : max, - sig_bits ? (1U << format->green_sBIT)-1 : max, - sig_bits ? (1U << format->blue_sBIT)-1 : max, - sig_bits ? (1U << format->alpha_sBIT)-1 : max); - - /* Store the input information for use in the transforms - these will - * modify the information. - */ - this->colour_type = colour_type; - this->bit_depth = bit_depth; - this->sample_depth = sample_depth; - this->have_tRNS = 0; - this->swap_rgb = 0; - this->alpha_first = 0; - this->alpha_inverted = 0; - this->mono_inverted = 0; - this->swap16 = 0; - this->littleendian = 0; - this->sig_bits = 0; -} - -#if defined PNG_READ_EXPAND_SUPPORTED || defined PNG_READ_GRAY_TO_RGB_SUPPORTED\ - || defined PNG_READ_EXPAND_SUPPORTED || defined PNG_READ_EXPAND_16_SUPPORTED\ - || defined PNG_READ_BACKGROUND_SUPPORTED -/* Convert a palette image to an rgb image. This necessarily converts the tRNS - * chunk at the same time, because the tRNS will be in palette form. The way - * palette validation works means that the original palette is never updated, - * instead the image_pixel value from the row contains the RGB of the - * corresponding palette entry and *this* is updated. Consequently this routine - * only needs to change the colour type information. - */ -static void -image_pixel_convert_PLTE(image_pixel *this) -{ - if (this->colour_type == PNG_COLOR_TYPE_PALETTE) - { - if (this->have_tRNS) - { - this->colour_type = PNG_COLOR_TYPE_RGB_ALPHA; - this->have_tRNS = 0; - } - else - this->colour_type = PNG_COLOR_TYPE_RGB; - - /* The bit depth of the row changes at this point too (notice that this is - * the row format, not the sample depth, which is separate.) - */ - this->bit_depth = 8; - } -} - -/* Add an alpha channel; this will import the tRNS information because tRNS is - * not valid in an alpha image. The bit depth will invariably be set to at - * least 8 prior to 1.7.0. Palette images will be converted to alpha (using - * the above API). With png_set_background the alpha channel is never expanded - * but this routine is used by pngvalid to simplify code; 'for_background' - * records this. - */ -static void -image_pixel_add_alpha(image_pixel *this, const standard_display *display, - int for_background) -{ - if (this->colour_type == PNG_COLOR_TYPE_PALETTE) - image_pixel_convert_PLTE(this); - - if ((this->colour_type & PNG_COLOR_MASK_ALPHA) == 0) - { - if (this->colour_type == PNG_COLOR_TYPE_GRAY) - { -# if PNG_LIBPNG_VER < 10700 - if (!for_background && this->bit_depth < 8) - this->bit_depth = this->sample_depth = 8; -# endif - - if (this->have_tRNS) - { - /* After 1.7 the expansion of bit depth only happens if there is a - * tRNS chunk to expand at this point. - */ -# if PNG_LIBPNG_VER >= 10700 - if (!for_background && this->bit_depth < 8) - this->bit_depth = this->sample_depth = 8; -# endif - - this->have_tRNS = 0; - - /* Check the input, original, channel value here against the - * original tRNS gray chunk valie. - */ - if (this->red == display->transparent.red) - this->alphaf = 0; - else - this->alphaf = 1; - } - else - this->alphaf = 1; - - this->colour_type = PNG_COLOR_TYPE_GRAY_ALPHA; - } - - else if (this->colour_type == PNG_COLOR_TYPE_RGB) - { - if (this->have_tRNS) - { - this->have_tRNS = 0; - - /* Again, check the exact input values, not the current transformed - * value! - */ - if (this->red == display->transparent.red && - this->green == display->transparent.green && - this->blue == display->transparent.blue) - this->alphaf = 0; - else - this->alphaf = 1; - } - else - this->alphaf = 1; - - this->colour_type = PNG_COLOR_TYPE_RGB_ALPHA; - } - - /* The error in the alpha is zero and the sBIT value comes from the - * original sBIT data (actually it will always be the original bit depth). - */ - this->alphae = 0; - this->alpha_sBIT = display->alpha_sBIT; - } -} -#endif /* transforms that need image_pixel_add_alpha */ - -struct transform_display; -typedef struct image_transform -{ - /* The name of this transform: a string. */ - const char *name; - - /* Each transform can be disabled from the command line: */ - int enable; - - /* The global list of transforms; read only. */ - struct image_transform *const list; - - /* The global count of the number of times this transform has been set on an - * image. - */ - unsigned int global_use; - - /* The local count of the number of times this transform has been set. */ - unsigned int local_use; - - /* The next transform in the list, each transform must call its own next - * transform after it has processed the pixel successfully. - */ - const struct image_transform *next; - - /* A single transform for the image, expressed as a series of function - * callbacks and some space for values. - * - * First a callback to add any required modifications to the png_modifier; - * this gets called just before the modifier is set up for read. - */ - void (*ini)(const struct image_transform *this, - struct transform_display *that); - - /* And a callback to set the transform on the current png_read_struct: - */ - void (*set)(const struct image_transform *this, - struct transform_display *that, png_structp pp, png_infop pi); - - /* Then a transform that takes an input pixel in one PNG format or another - * and modifies it by a pngvalid implementation of the transform (thus - * duplicating the libpng intent without, we hope, duplicating the bugs - * in the libpng implementation!) The png_structp is solely to allow error - * reporting via png_error and png_warning. - */ - void (*mod)(const struct image_transform *this, image_pixel *that, - png_const_structp pp, const struct transform_display *display); - - /* Add this transform to the list and return true if the transform is - * meaningful for this colour type and bit depth - if false then the - * transform should have no effect on the image so there's not a lot of - * point running it. - */ - int (*add)(struct image_transform *this, - const struct image_transform **that, png_byte colour_type, - png_byte bit_depth); -} image_transform; - -typedef struct transform_display -{ - standard_display this; - - /* Parameters */ - png_modifier* pm; - const image_transform* transform_list; - unsigned int max_gamma_8; - - /* Local variables */ - png_byte output_colour_type; - png_byte output_bit_depth; - png_byte unpacked; - - /* Modifications (not necessarily used.) */ - gama_modification gama_mod; - chrm_modification chrm_mod; - srgb_modification srgb_mod; -} transform_display; - -/* Set sRGB, cHRM and gAMA transforms as required by the current encoding. */ -static void -transform_set_encoding(transform_display *this) -{ - /* Set up the png_modifier '_current' fields then use these to determine how - * to add appropriate chunks. - */ - png_modifier *pm = this->pm; - - modifier_set_encoding(pm); - - if (modifier_color_encoding_is_set(pm)) - { - if (modifier_color_encoding_is_sRGB(pm)) - srgb_modification_init(&this->srgb_mod, pm, PNG_sRGB_INTENT_ABSOLUTE); - - else - { - /* Set gAMA and cHRM separately. */ - gama_modification_init(&this->gama_mod, pm, pm->current_gamma); - - if (pm->current_encoding != 0) - chrm_modification_init(&this->chrm_mod, pm, pm->current_encoding); - } - } -} - -/* Three functions to end the list: */ -static void -image_transform_ini_end(const image_transform *this, - transform_display *that) -{ - UNUSED(this) - UNUSED(that) -} - -static void -image_transform_set_end(const image_transform *this, - transform_display *that, png_structp pp, png_infop pi) -{ - UNUSED(this) - UNUSED(that) - UNUSED(pp) - UNUSED(pi) -} - -/* At the end of the list recalculate the output image pixel value from the - * double precision values set up by the preceding 'mod' calls: - */ -static unsigned int -sample_scale(double sample_value, unsigned int scale) -{ - sample_value = floor(sample_value * scale + .5); - - /* Return NaN as 0: */ - if (!(sample_value > 0)) - sample_value = 0; - else if (sample_value > scale) - sample_value = scale; - - return (unsigned int)sample_value; -} - -static void -image_transform_mod_end(const image_transform *this, image_pixel *that, - png_const_structp pp, const transform_display *display) -{ - unsigned int scale = (1U<sample_depth)-1; - int sig_bits = that->sig_bits; - - UNUSED(this) - UNUSED(pp) - UNUSED(display) - - /* At the end recalculate the digitized red green and blue values according - * to the current sample_depth of the pixel. - * - * The sample value is simply scaled to the maximum, checking for over - * and underflow (which can both happen for some image transforms, - * including simple size scaling, though libpng doesn't do that at present. - */ - that->red = sample_scale(that->redf, scale); - - /* This is a bit bogus; really the above calculation should use the red_sBIT - * value, not sample_depth, but because libpng does png_set_shift by just - * shifting the bits we get errors if we don't do it the same way. - */ - if (sig_bits && that->red_sBIT < that->sample_depth) - that->red >>= that->sample_depth - that->red_sBIT; - - /* The error value is increased, at the end, according to the lowest sBIT - * value seen. Common sense tells us that the intermediate integer - * representations are no more accurate than +/- 0.5 in the integral values, - * the sBIT allows the implementation to be worse than this. In addition the - * PNG specification actually permits any error within the range (-1..+1), - * but that is ignored here. Instead the final digitized value is compared, - * below to the digitized value of the error limits - this has the net effect - * of allowing (almost) +/-1 in the output value. It's difficult to see how - * any algorithm that digitizes intermediate results can be more accurate. - */ - that->rede += 1./(2*((1U<red_sBIT)-1)); - - if (that->colour_type & PNG_COLOR_MASK_COLOR) - { - that->green = sample_scale(that->greenf, scale); - if (sig_bits && that->green_sBIT < that->sample_depth) - that->green >>= that->sample_depth - that->green_sBIT; - - that->blue = sample_scale(that->bluef, scale); - if (sig_bits && that->blue_sBIT < that->sample_depth) - that->blue >>= that->sample_depth - that->blue_sBIT; - - that->greene += 1./(2*((1U<green_sBIT)-1)); - that->bluee += 1./(2*((1U<blue_sBIT)-1)); - } - else - { - that->blue = that->green = that->red; - that->bluef = that->greenf = that->redf; - that->bluee = that->greene = that->rede; - } - - if ((that->colour_type & PNG_COLOR_MASK_ALPHA) || - that->colour_type == PNG_COLOR_TYPE_PALETTE) - { - that->alpha = sample_scale(that->alphaf, scale); - that->alphae += 1./(2*((1U<alpha_sBIT)-1)); - } - else - { - that->alpha = scale; /* opaque */ - that->alphaf = 1; /* Override this. */ - that->alphae = 0; /* It's exact ;-) */ - } - - if (sig_bits && that->alpha_sBIT < that->sample_depth) - that->alpha >>= that->sample_depth - that->alpha_sBIT; -} - -/* Static 'end' structure: */ -static image_transform image_transform_end = -{ - "(end)", /* name */ - 1, /* enable */ - 0, /* list */ - 0, /* global_use */ - 0, /* local_use */ - 0, /* next */ - image_transform_ini_end, - image_transform_set_end, - image_transform_mod_end, - 0 /* never called, I want it to crash if it is! */ -}; - -/* Reader callbacks and implementations, where they differ from the standard - * ones. - */ -static void -transform_display_init(transform_display *dp, png_modifier *pm, png_uint_32 id, - const image_transform *transform_list) -{ - memset(dp, 0, sizeof *dp); - - /* Standard fields */ - standard_display_init(&dp->this, &pm->this, id, do_read_interlace, - pm->use_update_info); - - /* Parameter fields */ - dp->pm = pm; - dp->transform_list = transform_list; - dp->max_gamma_8 = 16; - - /* Local variable fields */ - dp->output_colour_type = 255; /* invalid */ - dp->output_bit_depth = 255; /* invalid */ - dp->unpacked = 0; /* not unpacked */ -} - -static void -transform_info_imp(transform_display *dp, png_structp pp, png_infop pi) -{ - /* Reuse the standard stuff as appropriate. */ - standard_info_part1(&dp->this, pp, pi); - - /* Now set the list of transforms. */ - dp->transform_list->set(dp->transform_list, dp, pp, pi); - - /* Update the info structure for these transforms: */ - { - int i = dp->this.use_update_info; - /* Always do one call, even if use_update_info is 0. */ - do - png_read_update_info(pp, pi); - while (--i > 0); - } - - /* And get the output information into the standard_display */ - standard_info_part2(&dp->this, pp, pi, 1/*images*/); - - /* Plus the extra stuff we need for the transform tests: */ - dp->output_colour_type = png_get_color_type(pp, pi); - dp->output_bit_depth = png_get_bit_depth(pp, pi); - - /* If png_set_filler is in action then fake the output color type to include - * an alpha channel where appropriate. - */ - if (dp->output_bit_depth >= 8 && - (dp->output_colour_type == PNG_COLOR_TYPE_RGB || - dp->output_colour_type == PNG_COLOR_TYPE_GRAY) && dp->this.filler) - dp->output_colour_type |= 4; - - /* Validate the combination of colour type and bit depth that we are getting - * out of libpng; the semantics of something not in the PNG spec are, at - * best, unclear. - */ - switch (dp->output_colour_type) - { - case PNG_COLOR_TYPE_PALETTE: - if (dp->output_bit_depth > 8) goto error; - /* FALLTHROUGH */ - case PNG_COLOR_TYPE_GRAY: - if (dp->output_bit_depth == 1 || dp->output_bit_depth == 2 || - dp->output_bit_depth == 4) - break; - /* FALLTHROUGH */ - default: - if (dp->output_bit_depth == 8 || dp->output_bit_depth == 16) - break; - /* FALLTHROUGH */ - error: - { - char message[128]; - size_t pos; - - pos = safecat(message, sizeof message, 0, - "invalid final bit depth: colour type("); - pos = safecatn(message, sizeof message, pos, dp->output_colour_type); - pos = safecat(message, sizeof message, pos, ") with bit depth: "); - pos = safecatn(message, sizeof message, pos, dp->output_bit_depth); - - png_error(pp, message); - } - } - - /* Use a test pixel to check that the output agrees with what we expect - - * this avoids running the whole test if the output is unexpected. This also - * checks for internal errors. - */ - { - image_pixel test_pixel; - - memset(&test_pixel, 0, sizeof test_pixel); - test_pixel.colour_type = dp->this.colour_type; /* input */ - test_pixel.bit_depth = dp->this.bit_depth; - if (test_pixel.colour_type == PNG_COLOR_TYPE_PALETTE) - test_pixel.sample_depth = 8; - else - test_pixel.sample_depth = test_pixel.bit_depth; - /* Don't need sBIT here, but it must be set to non-zero to avoid - * arithmetic overflows. - */ - test_pixel.have_tRNS = dp->this.is_transparent != 0; - test_pixel.red_sBIT = test_pixel.green_sBIT = test_pixel.blue_sBIT = - test_pixel.alpha_sBIT = test_pixel.sample_depth; - - dp->transform_list->mod(dp->transform_list, &test_pixel, pp, dp); - - if (test_pixel.colour_type != dp->output_colour_type) - { - char message[128]; - size_t pos = safecat(message, sizeof message, 0, "colour type "); - - pos = safecatn(message, sizeof message, pos, dp->output_colour_type); - pos = safecat(message, sizeof message, pos, " expected "); - pos = safecatn(message, sizeof message, pos, test_pixel.colour_type); - - png_error(pp, message); - } - - if (test_pixel.bit_depth != dp->output_bit_depth) - { - char message[128]; - size_t pos = safecat(message, sizeof message, 0, "bit depth "); - - pos = safecatn(message, sizeof message, pos, dp->output_bit_depth); - pos = safecat(message, sizeof message, pos, " expected "); - pos = safecatn(message, sizeof message, pos, test_pixel.bit_depth); - - png_error(pp, message); - } - - /* If both bit depth and colour type are correct check the sample depth. - */ - if (test_pixel.colour_type == PNG_COLOR_TYPE_PALETTE && - test_pixel.sample_depth != 8) /* oops - internal error! */ - png_error(pp, "pngvalid: internal: palette sample depth not 8"); - else if (dp->unpacked && test_pixel.bit_depth != 8) - png_error(pp, "pngvalid: internal: bad unpacked pixel depth"); - else if (!dp->unpacked && test_pixel.colour_type != PNG_COLOR_TYPE_PALETTE - && test_pixel.bit_depth != test_pixel.sample_depth) - { - char message[128]; - size_t pos = safecat(message, sizeof message, 0, - "internal: sample depth "); - - /* Because unless something has set 'unpacked' or the image is palette - * mapped we expect the transform to keep sample depth and bit depth - * the same. - */ - pos = safecatn(message, sizeof message, pos, test_pixel.sample_depth); - pos = safecat(message, sizeof message, pos, " expected "); - pos = safecatn(message, sizeof message, pos, test_pixel.bit_depth); - - png_error(pp, message); - } - else if (test_pixel.bit_depth != dp->output_bit_depth) - { - /* This could be a libpng error too; libpng has not produced what we - * expect for the output bit depth. - */ - char message[128]; - size_t pos = safecat(message, sizeof message, 0, - "internal: bit depth "); - - pos = safecatn(message, sizeof message, pos, dp->output_bit_depth); - pos = safecat(message, sizeof message, pos, " expected "); - pos = safecatn(message, sizeof message, pos, test_pixel.bit_depth); - - png_error(pp, message); - } - } -} - -static void PNGCBAPI -transform_info(png_structp pp, png_infop pi) -{ - transform_info_imp(voidcast(transform_display*, png_get_progressive_ptr(pp)), - pp, pi); -} - -static void -transform_range_check(png_const_structp pp, unsigned int r, unsigned int g, - unsigned int b, unsigned int a, unsigned int in_digitized, double in, - unsigned int out, png_byte sample_depth, double err, double limit, - const char *name, double digitization_error) -{ - /* Compare the scaled, digitzed, values of our local calculation (in+-err) - * with the digitized values libpng produced; 'sample_depth' is the actual - * digitization depth of the libpng output colors (the bit depth except for - * palette images where it is always 8.) The check on 'err' is to detect - * internal errors in pngvalid itself. - */ - unsigned int max = (1U< limit ||) !(out >= in_min && out <= in_max)) - { - char message[256]; - size_t pos; - - pos = safecat(message, sizeof message, 0, name); - pos = safecat(message, sizeof message, pos, " output value error: rgba("); - pos = safecatn(message, sizeof message, pos, r); - pos = safecat(message, sizeof message, pos, ","); - pos = safecatn(message, sizeof message, pos, g); - pos = safecat(message, sizeof message, pos, ","); - pos = safecatn(message, sizeof message, pos, b); - pos = safecat(message, sizeof message, pos, ","); - pos = safecatn(message, sizeof message, pos, a); - pos = safecat(message, sizeof message, pos, "): "); - pos = safecatn(message, sizeof message, pos, out); - pos = safecat(message, sizeof message, pos, " expected: "); - pos = safecatn(message, sizeof message, pos, in_digitized); - pos = safecat(message, sizeof message, pos, " ("); - pos = safecatd(message, sizeof message, pos, (in-err)*max, 3); - pos = safecat(message, sizeof message, pos, ".."); - pos = safecatd(message, sizeof message, pos, (in+err)*max, 3); - pos = safecat(message, sizeof message, pos, ")"); - - png_error(pp, message); - } - - UNUSED(limit) -} - -static void -transform_image_validate(transform_display *dp, png_const_structp pp, - png_infop pi) -{ - /* Constants for the loop below: */ - const png_store* const ps = dp->this.ps; - png_byte in_ct = dp->this.colour_type; - png_byte in_bd = dp->this.bit_depth; - png_uint_32 w = dp->this.w; - png_uint_32 h = dp->this.h; - png_byte out_ct = dp->output_colour_type; - png_byte out_bd = dp->output_bit_depth; - png_byte sample_depth = - (png_byte)(out_ct == PNG_COLOR_TYPE_PALETTE ? 8 : out_bd); - png_byte red_sBIT = dp->this.red_sBIT; - png_byte green_sBIT = dp->this.green_sBIT; - png_byte blue_sBIT = dp->this.blue_sBIT; - png_byte alpha_sBIT = dp->this.alpha_sBIT; - int have_tRNS = dp->this.is_transparent; - double digitization_error; - - store_palette out_palette; - png_uint_32 y; - - UNUSED(pi) - - /* Check for row overwrite errors */ - store_image_check(dp->this.ps, pp, 0); - - /* Read the palette corresponding to the output if the output colour type - * indicates a palette, otherwise set out_palette to garbage. - */ - if (out_ct == PNG_COLOR_TYPE_PALETTE) - { - /* Validate that the palette count itself has not changed - this is not - * expected. - */ - int npalette = (-1); - - (void)read_palette(out_palette, &npalette, pp, pi); - if (npalette != dp->this.npalette) - png_error(pp, "unexpected change in palette size"); - - digitization_error = .5; - } - else - { - png_byte in_sample_depth; - - memset(out_palette, 0x5e, sizeof out_palette); - - /* use-input-precision means assume that if the input has 8 bit (or less) - * samples and the output has 16 bit samples the calculations will be done - * with 8 bit precision, not 16. - */ - if (in_ct == PNG_COLOR_TYPE_PALETTE || in_bd < 16) - in_sample_depth = 8; - else - in_sample_depth = in_bd; - - if (sample_depth != 16 || in_sample_depth > 8 || - !dp->pm->calculations_use_input_precision) - digitization_error = .5; - - /* Else calculations are at 8 bit precision, and the output actually - * consists of scaled 8-bit values, so scale .5 in 8 bits to the 16 bits: - */ - else - digitization_error = .5 * 257; - } - - for (y=0; ythis.palette, - NULL); - - in_pixel.red_sBIT = red_sBIT; - in_pixel.green_sBIT = green_sBIT; - in_pixel.blue_sBIT = blue_sBIT; - in_pixel.alpha_sBIT = alpha_sBIT; - in_pixel.have_tRNS = have_tRNS != 0; - - /* For error detection, below. */ - r = in_pixel.red; - g = in_pixel.green; - b = in_pixel.blue; - a = in_pixel.alpha; - - /* This applies the transforms to the input data, including output - * format operations which must be used when reading the output - * pixel that libpng produces. - */ - dp->transform_list->mod(dp->transform_list, &in_pixel, pp, dp); - - /* Read the output pixel and compare it to what we got, we don't - * use the error field here, so no need to update sBIT. in_pixel - * says whether we expect libpng to change the output format. - */ - image_pixel_init(&out_pixel, pRow, out_ct, out_bd, x, out_palette, - &in_pixel); - - /* We don't expect changes to the index here even if the bit depth is - * changed. - */ - if (in_ct == PNG_COLOR_TYPE_PALETTE && - out_ct == PNG_COLOR_TYPE_PALETTE) - { - if (in_pixel.palette_index != out_pixel.palette_index) - png_error(pp, "unexpected transformed palette index"); - } - - /* Check the colours for palette images too - in fact the palette could - * be separately verified itself in most cases. - */ - if (in_pixel.red != out_pixel.red) - transform_range_check(pp, r, g, b, a, in_pixel.red, in_pixel.redf, - out_pixel.red, sample_depth, in_pixel.rede, - dp->pm->limit + 1./(2*((1U<pm->limit + 1./(2*((1U<pm->limit + 1./(2*((1U<pm->limit + 1./(2*((1U<this.ps->validated = 1; -} - -static void PNGCBAPI -transform_end(png_structp ppIn, png_infop pi) -{ - png_const_structp pp = ppIn; - transform_display *dp = voidcast(transform_display*, - png_get_progressive_ptr(pp)); - - if (!dp->this.speed) - transform_image_validate(dp, pp, pi); - else - dp->this.ps->validated = 1; -} - -/* A single test run. */ -static void -transform_test(png_modifier *pmIn, png_uint_32 idIn, - const image_transform* transform_listIn, const char * const name) -{ - transform_display d; - context(&pmIn->this, fault); - - transform_display_init(&d, pmIn, idIn, transform_listIn); - - Try - { - size_t pos = 0; - png_structp pp; - png_infop pi; - char full_name[256]; - - /* Make sure the encoding fields are correct and enter the required - * modifications. - */ - transform_set_encoding(&d); - - /* Add any modifications required by the transform list. */ - d.transform_list->ini(d.transform_list, &d); - - /* Add the color space information, if any, to the name. */ - pos = safecat(full_name, sizeof full_name, pos, name); - pos = safecat_current_encoding(full_name, sizeof full_name, pos, d.pm); - - /* Get a png_struct for reading the image. */ - pp = set_modifier_for_read(d.pm, &pi, d.this.id, full_name); - standard_palette_init(&d.this); - -# if 0 - /* Logging (debugging only) */ - { - char buffer[256]; - - (void)store_message(&d.pm->this, pp, buffer, sizeof buffer, 0, - "running test"); - - fprintf(stderr, "%s\n", buffer); - } -# endif - - /* Introduce the correct read function. */ - if (d.pm->this.progressive) - { - /* Share the row function with the standard implementation. */ - png_set_progressive_read_fn(pp, &d, transform_info, progressive_row, - transform_end); - - /* Now feed data into the reader until we reach the end: */ - modifier_progressive_read(d.pm, pp, pi); - } - else - { - /* modifier_read expects a png_modifier* */ - png_set_read_fn(pp, d.pm, modifier_read); - - /* Check the header values: */ - png_read_info(pp, pi); - - /* Process the 'info' requirements. Only one image is generated */ - transform_info_imp(&d, pp, pi); - - sequential_row(&d.this, pp, pi, -1, 0); - - if (!d.this.speed) - transform_image_validate(&d, pp, pi); - else - d.this.ps->validated = 1; - } - - modifier_reset(d.pm); - } - - Catch(fault) - { - modifier_reset(voidcast(png_modifier*,(void*)fault)); - } -} - -/* The transforms: */ -#define ITSTRUCT(name) image_transform_##name -#define ITDATA(name) image_transform_data_##name -#define image_transform_ini image_transform_default_ini -#define IT(name)\ -static image_transform ITSTRUCT(name) =\ -{\ - #name,\ - 1, /*enable*/\ - &PT, /*list*/\ - 0, /*global_use*/\ - 0, /*local_use*/\ - 0, /*next*/\ - image_transform_ini,\ - image_transform_png_set_##name##_set,\ - image_transform_png_set_##name##_mod,\ - image_transform_png_set_##name##_add\ -} -#define PT ITSTRUCT(end) /* stores the previous transform */ - -/* To save code: */ -extern void image_transform_default_ini(const image_transform *this, - transform_display *that); /* silence GCC warnings */ - -void /* private, but almost always needed */ -image_transform_default_ini(const image_transform *this, - transform_display *that) -{ - this->next->ini(this->next, that); -} - -#ifdef PNG_READ_BACKGROUND_SUPPORTED -static int -image_transform_default_add(image_transform *this, - const image_transform **that, png_byte colour_type, png_byte bit_depth) -{ - UNUSED(colour_type) - UNUSED(bit_depth) - - this->next = *that; - *that = this; - - return 1; -} -#endif - -#ifdef PNG_READ_EXPAND_SUPPORTED -/* png_set_palette_to_rgb */ -static void -image_transform_png_set_palette_to_rgb_set(const image_transform *this, - transform_display *that, png_structp pp, png_infop pi) -{ - png_set_palette_to_rgb(pp); - this->next->set(this->next, that, pp, pi); -} - -static void -image_transform_png_set_palette_to_rgb_mod(const image_transform *this, - image_pixel *that, png_const_structp pp, - const transform_display *display) -{ - if (that->colour_type == PNG_COLOR_TYPE_PALETTE) - image_pixel_convert_PLTE(that); - - this->next->mod(this->next, that, pp, display); -} - -static int -image_transform_png_set_palette_to_rgb_add(image_transform *this, - const image_transform **that, png_byte colour_type, png_byte bit_depth) -{ - UNUSED(bit_depth) - - this->next = *that; - *that = this; - - return colour_type == PNG_COLOR_TYPE_PALETTE; -} - -IT(palette_to_rgb); -#undef PT -#define PT ITSTRUCT(palette_to_rgb) -#endif /* PNG_READ_EXPAND_SUPPORTED */ - -#ifdef PNG_READ_EXPAND_SUPPORTED -/* png_set_tRNS_to_alpha */ -static void -image_transform_png_set_tRNS_to_alpha_set(const image_transform *this, - transform_display *that, png_structp pp, png_infop pi) -{ - png_set_tRNS_to_alpha(pp); - - /* If there was a tRNS chunk that would get expanded and add an alpha - * channel is_transparent must be updated: - */ - if (that->this.has_tRNS) - that->this.is_transparent = 1; - - this->next->set(this->next, that, pp, pi); -} - -static void -image_transform_png_set_tRNS_to_alpha_mod(const image_transform *this, - image_pixel *that, png_const_structp pp, - const transform_display *display) -{ -#if PNG_LIBPNG_VER < 10700 - /* LIBPNG BUG: this always forces palette images to RGB. */ - if (that->colour_type == PNG_COLOR_TYPE_PALETTE) - image_pixel_convert_PLTE(that); -#endif - - /* This effectively does an 'expand' only if there is some transparency to - * convert to an alpha channel. - */ - if (that->have_tRNS) -# if PNG_LIBPNG_VER >= 10700 - if (that->colour_type != PNG_COLOR_TYPE_PALETTE && - (that->colour_type & PNG_COLOR_MASK_ALPHA) == 0) -# endif - image_pixel_add_alpha(that, &display->this, 0/*!for background*/); - -#if PNG_LIBPNG_VER < 10700 - /* LIBPNG BUG: otherwise libpng still expands to 8 bits! */ - else - { - if (that->bit_depth < 8) - that->bit_depth =8; - if (that->sample_depth < 8) - that->sample_depth = 8; - } -#endif - - this->next->mod(this->next, that, pp, display); -} - -static int -image_transform_png_set_tRNS_to_alpha_add(image_transform *this, - const image_transform **that, png_byte colour_type, png_byte bit_depth) -{ - UNUSED(bit_depth) - - this->next = *that; - *that = this; - - /* We don't know yet whether there will be a tRNS chunk, but we know that - * this transformation should do nothing if there already is an alpha - * channel. In addition, after the bug fix in 1.7.0, there is no longer - * any action on a palette image. - */ - return -# if PNG_LIBPNG_VER >= 10700 - colour_type != PNG_COLOR_TYPE_PALETTE && -# endif - (colour_type & PNG_COLOR_MASK_ALPHA) == 0; -} - -IT(tRNS_to_alpha); -#undef PT -#define PT ITSTRUCT(tRNS_to_alpha) -#endif /* PNG_READ_EXPAND_SUPPORTED */ - -#ifdef PNG_READ_GRAY_TO_RGB_SUPPORTED -/* png_set_gray_to_rgb */ -static void -image_transform_png_set_gray_to_rgb_set(const image_transform *this, - transform_display *that, png_structp pp, png_infop pi) -{ - png_set_gray_to_rgb(pp); - /* NOTE: this doesn't result in tRNS expansion. */ - this->next->set(this->next, that, pp, pi); -} - -static void -image_transform_png_set_gray_to_rgb_mod(const image_transform *this, - image_pixel *that, png_const_structp pp, - const transform_display *display) -{ - /* NOTE: we can actually pend the tRNS processing at this point because we - * can correctly recognize the original pixel value even though we have - * mapped the one gray channel to the three RGB ones, but in fact libpng - * doesn't do this, so we don't either. - */ - if ((that->colour_type & PNG_COLOR_MASK_COLOR) == 0 && that->have_tRNS) - image_pixel_add_alpha(that, &display->this, 0/*!for background*/); - - /* Simply expand the bit depth and alter the colour type as required. */ - if (that->colour_type == PNG_COLOR_TYPE_GRAY) - { - /* RGB images have a bit depth at least equal to '8' */ - if (that->bit_depth < 8) - that->sample_depth = that->bit_depth = 8; - - /* And just changing the colour type works here because the green and blue - * channels are being maintained in lock-step with the red/gray: - */ - that->colour_type = PNG_COLOR_TYPE_RGB; - } - - else if (that->colour_type == PNG_COLOR_TYPE_GRAY_ALPHA) - that->colour_type = PNG_COLOR_TYPE_RGB_ALPHA; - - this->next->mod(this->next, that, pp, display); -} - -static int -image_transform_png_set_gray_to_rgb_add(image_transform *this, - const image_transform **that, png_byte colour_type, png_byte bit_depth) -{ - UNUSED(bit_depth) - - this->next = *that; - *that = this; - - return (colour_type & PNG_COLOR_MASK_COLOR) == 0; -} - -IT(gray_to_rgb); -#undef PT -#define PT ITSTRUCT(gray_to_rgb) -#endif /* PNG_READ_GRAY_TO_RGB_SUPPORTED */ - -#ifdef PNG_READ_EXPAND_SUPPORTED -/* png_set_expand */ -static void -image_transform_png_set_expand_set(const image_transform *this, - transform_display *that, png_structp pp, png_infop pi) -{ - png_set_expand(pp); - - if (that->this.has_tRNS) - that->this.is_transparent = 1; - - this->next->set(this->next, that, pp, pi); -} - -static void -image_transform_png_set_expand_mod(const image_transform *this, - image_pixel *that, png_const_structp pp, - const transform_display *display) -{ - /* The general expand case depends on what the colour type is: */ - if (that->colour_type == PNG_COLOR_TYPE_PALETTE) - image_pixel_convert_PLTE(that); - else if (that->bit_depth < 8) /* grayscale */ - that->sample_depth = that->bit_depth = 8; - - if (that->have_tRNS) - image_pixel_add_alpha(that, &display->this, 0/*!for background*/); - - this->next->mod(this->next, that, pp, display); -} - -static int -image_transform_png_set_expand_add(image_transform *this, - const image_transform **that, png_byte colour_type, png_byte bit_depth) -{ - UNUSED(bit_depth) - - this->next = *that; - *that = this; - - /* 'expand' should do nothing for RGBA or GA input - no tRNS and the bit - * depth is at least 8 already. - */ - return (colour_type & PNG_COLOR_MASK_ALPHA) == 0; -} - -IT(expand); -#undef PT -#define PT ITSTRUCT(expand) -#endif /* PNG_READ_EXPAND_SUPPORTED */ - -#ifdef PNG_READ_EXPAND_SUPPORTED -/* png_set_expand_gray_1_2_4_to_8 - * Pre 1.7.0 LIBPNG BUG: this just does an 'expand' - */ -static void -image_transform_png_set_expand_gray_1_2_4_to_8_set( - const image_transform *this, transform_display *that, png_structp pp, - png_infop pi) -{ - png_set_expand_gray_1_2_4_to_8(pp); - /* NOTE: don't expect this to expand tRNS */ - this->next->set(this->next, that, pp, pi); -} - -static void -image_transform_png_set_expand_gray_1_2_4_to_8_mod( - const image_transform *this, image_pixel *that, png_const_structp pp, - const transform_display *display) -{ -#if PNG_LIBPNG_VER < 10700 - image_transform_png_set_expand_mod(this, that, pp, display); -#else - /* Only expand grayscale of bit depth less than 8: */ - if (that->colour_type == PNG_COLOR_TYPE_GRAY && - that->bit_depth < 8) - that->sample_depth = that->bit_depth = 8; - - this->next->mod(this->next, that, pp, display); -#endif /* 1.7 or later */ -} - -static int -image_transform_png_set_expand_gray_1_2_4_to_8_add(image_transform *this, - const image_transform **that, png_byte colour_type, png_byte bit_depth) -{ -#if PNG_LIBPNG_VER < 10700 - return image_transform_png_set_expand_add(this, that, colour_type, - bit_depth); -#else - UNUSED(bit_depth) - - this->next = *that; - *that = this; - - /* This should do nothing unless the color type is gray and the bit depth is - * less than 8: - */ - return colour_type == PNG_COLOR_TYPE_GRAY && bit_depth < 8; -#endif /* 1.7 or later */ -} - -IT(expand_gray_1_2_4_to_8); -#undef PT -#define PT ITSTRUCT(expand_gray_1_2_4_to_8) -#endif /* PNG_READ_EXPAND_SUPPORTED */ - -#ifdef PNG_READ_EXPAND_16_SUPPORTED -/* png_set_expand_16 */ -static void -image_transform_png_set_expand_16_set(const image_transform *this, - transform_display *that, png_structp pp, png_infop pi) -{ - png_set_expand_16(pp); - - /* NOTE: prior to 1.7 libpng does SET_EXPAND as well, so tRNS is expanded. */ -# if PNG_LIBPNG_VER < 10700 - if (that->this.has_tRNS) - that->this.is_transparent = 1; -# endif - - this->next->set(this->next, that, pp, pi); -} - -static void -image_transform_png_set_expand_16_mod(const image_transform *this, - image_pixel *that, png_const_structp pp, - const transform_display *display) -{ - /* Expect expand_16 to expand everything to 16 bits as a result of also - * causing 'expand' to happen. - */ - if (that->colour_type == PNG_COLOR_TYPE_PALETTE) - image_pixel_convert_PLTE(that); - - if (that->have_tRNS) - image_pixel_add_alpha(that, &display->this, 0/*!for background*/); - - if (that->bit_depth < 16) - that->sample_depth = that->bit_depth = 16; - - this->next->mod(this->next, that, pp, display); -} - -static int -image_transform_png_set_expand_16_add(image_transform *this, - const image_transform **that, png_byte colour_type, png_byte bit_depth) -{ - UNUSED(colour_type) - - this->next = *that; - *that = this; - - /* expand_16 does something unless the bit depth is already 16. */ - return bit_depth < 16; -} - -IT(expand_16); -#undef PT -#define PT ITSTRUCT(expand_16) -#endif /* PNG_READ_EXPAND_16_SUPPORTED */ - -#ifdef PNG_READ_SCALE_16_TO_8_SUPPORTED /* API added in 1.5.4 */ -/* png_set_scale_16 */ -static void -image_transform_png_set_scale_16_set(const image_transform *this, - transform_display *that, png_structp pp, png_infop pi) -{ - png_set_scale_16(pp); -# if PNG_LIBPNG_VER < 10700 - /* libpng will limit the gamma table size: */ - that->max_gamma_8 = PNG_MAX_GAMMA_8; -# endif - this->next->set(this->next, that, pp, pi); -} - -static void -image_transform_png_set_scale_16_mod(const image_transform *this, - image_pixel *that, png_const_structp pp, - const transform_display *display) -{ - if (that->bit_depth == 16) - { - that->sample_depth = that->bit_depth = 8; - if (that->red_sBIT > 8) that->red_sBIT = 8; - if (that->green_sBIT > 8) that->green_sBIT = 8; - if (that->blue_sBIT > 8) that->blue_sBIT = 8; - if (that->alpha_sBIT > 8) that->alpha_sBIT = 8; - } - - this->next->mod(this->next, that, pp, display); -} - -static int -image_transform_png_set_scale_16_add(image_transform *this, - const image_transform **that, png_byte colour_type, png_byte bit_depth) -{ - UNUSED(colour_type) - - this->next = *that; - *that = this; - - return bit_depth > 8; -} - -IT(scale_16); -#undef PT -#define PT ITSTRUCT(scale_16) -#endif /* PNG_READ_SCALE_16_TO_8_SUPPORTED (1.5.4 on) */ - -#ifdef PNG_READ_16_TO_8_SUPPORTED /* the default before 1.5.4 */ -/* png_set_strip_16 */ -static void -image_transform_png_set_strip_16_set(const image_transform *this, - transform_display *that, png_structp pp, png_infop pi) -{ - png_set_strip_16(pp); -# if PNG_LIBPNG_VER < 10700 - /* libpng will limit the gamma table size: */ - that->max_gamma_8 = PNG_MAX_GAMMA_8; -# endif - this->next->set(this->next, that, pp, pi); -} - -static void -image_transform_png_set_strip_16_mod(const image_transform *this, - image_pixel *that, png_const_structp pp, - const transform_display *display) -{ - if (that->bit_depth == 16) - { - that->sample_depth = that->bit_depth = 8; - if (that->red_sBIT > 8) that->red_sBIT = 8; - if (that->green_sBIT > 8) that->green_sBIT = 8; - if (that->blue_sBIT > 8) that->blue_sBIT = 8; - if (that->alpha_sBIT > 8) that->alpha_sBIT = 8; - - /* Prior to 1.5.4 png_set_strip_16 would use an 'accurate' method if this - * configuration option is set. From 1.5.4 the flag is never set and the - * 'scale' API (above) must be used. - */ -# ifdef PNG_READ_ACCURATE_SCALE_SUPPORTED -# if PNG_LIBPNG_VER >= 10504 -# error PNG_READ_ACCURATE_SCALE should not be set -# endif - - /* The strip 16 algorithm drops the low 8 bits rather than calculating - * 1/257, so we need to adjust the permitted errors appropriately: - * Notice that this is only relevant prior to the addition of the - * png_set_scale_16 API in 1.5.4 (but 1.5.4+ always defines the above!) - */ - { - const double d = (255-128.5)/65535; - that->rede += d; - that->greene += d; - that->bluee += d; - that->alphae += d; - } -# endif - } - - this->next->mod(this->next, that, pp, display); -} - -static int -image_transform_png_set_strip_16_add(image_transform *this, - const image_transform **that, png_byte colour_type, png_byte bit_depth) -{ - UNUSED(colour_type) - - this->next = *that; - *that = this; - - return bit_depth > 8; -} - -IT(strip_16); -#undef PT -#define PT ITSTRUCT(strip_16) -#endif /* PNG_READ_16_TO_8_SUPPORTED */ - -#ifdef PNG_READ_STRIP_ALPHA_SUPPORTED -/* png_set_strip_alpha */ -static void -image_transform_png_set_strip_alpha_set(const image_transform *this, - transform_display *that, png_structp pp, png_infop pi) -{ - png_set_strip_alpha(pp); - this->next->set(this->next, that, pp, pi); -} - -static void -image_transform_png_set_strip_alpha_mod(const image_transform *this, - image_pixel *that, png_const_structp pp, - const transform_display *display) -{ - if (that->colour_type == PNG_COLOR_TYPE_GRAY_ALPHA) - that->colour_type = PNG_COLOR_TYPE_GRAY; - else if (that->colour_type == PNG_COLOR_TYPE_RGB_ALPHA) - that->colour_type = PNG_COLOR_TYPE_RGB; - - that->have_tRNS = 0; - that->alphaf = 1; - - this->next->mod(this->next, that, pp, display); -} - -static int -image_transform_png_set_strip_alpha_add(image_transform *this, - const image_transform **that, png_byte colour_type, png_byte bit_depth) -{ - UNUSED(bit_depth) - - this->next = *that; - *that = this; - - return (colour_type & PNG_COLOR_MASK_ALPHA) != 0; -} - -IT(strip_alpha); -#undef PT -#define PT ITSTRUCT(strip_alpha) -#endif /* PNG_READ_STRIP_ALPHA_SUPPORTED */ - -#ifdef PNG_READ_RGB_TO_GRAY_SUPPORTED -/* png_set_rgb_to_gray(png_structp, int err_action, double red, double green) - * png_set_rgb_to_gray_fixed(png_structp, int err_action, png_fixed_point red, - * png_fixed_point green) - * png_get_rgb_to_gray_status - * - * The 'default' test here uses values known to be used inside libpng prior to - * 1.7.0: - * - * red: 6968 - * green: 23434 - * blue: 2366 - * - * These values are being retained for compatibility, along with the somewhat - * broken truncation calculation in the fast-and-inaccurate code path. Older - * versions of libpng will fail the accuracy tests below because they use the - * truncation algorithm everywhere. - */ -#define data ITDATA(rgb_to_gray) -static struct -{ - double gamma; /* File gamma to use in processing */ - - /* The following are the parameters for png_set_rgb_to_gray: */ -# ifdef PNG_FLOATING_POINT_SUPPORTED - double red_to_set; - double green_to_set; -# else - png_fixed_point red_to_set; - png_fixed_point green_to_set; -# endif - - /* The actual coefficients: */ - double red_coefficient; - double green_coefficient; - double blue_coefficient; - - /* Set if the coeefficients have been overridden. */ - int coefficients_overridden; -} data; - -#undef image_transform_ini -#define image_transform_ini image_transform_png_set_rgb_to_gray_ini -static void -image_transform_png_set_rgb_to_gray_ini(const image_transform *this, - transform_display *that) -{ - png_modifier *pm = that->pm; - const color_encoding *e = pm->current_encoding; - - UNUSED(this) - - /* Since we check the encoding this flag must be set: */ - pm->test_uses_encoding = 1; - - /* If 'e' is not NULL chromaticity information is present and either a cHRM - * or an sRGB chunk will be inserted. - */ - if (e != 0) - { - /* Coefficients come from the encoding, but may need to be normalized to a - * white point Y of 1.0 - */ - const double whiteY = e->red.Y + e->green.Y + e->blue.Y; - - data.red_coefficient = e->red.Y; - data.green_coefficient = e->green.Y; - data.blue_coefficient = e->blue.Y; - - if (whiteY != 1) - { - data.red_coefficient /= whiteY; - data.green_coefficient /= whiteY; - data.blue_coefficient /= whiteY; - } - } - - else - { - /* The default (built in) coeffcients, as above: */ -# if PNG_LIBPNG_VER < 10700 - data.red_coefficient = 6968 / 32768.; - data.green_coefficient = 23434 / 32768.; - data.blue_coefficient = 2366 / 32768.; -# else - data.red_coefficient = .2126; - data.green_coefficient = .7152; - data.blue_coefficient = .0722; -# endif - } - - data.gamma = pm->current_gamma; - - /* If not set then the calculations assume linear encoding (implicitly): */ - if (data.gamma == 0) - data.gamma = 1; - - /* The arguments to png_set_rgb_to_gray can override the coefficients implied - * by the color space encoding. If doing exhaustive checks do the override - * in each case, otherwise do it randomly. - */ - if (pm->test_exhaustive) - { - /* First time in coefficients_overridden is 0, the following sets it to 1, - * so repeat if it is set. If a test fails this may mean we subsequently - * skip a non-override test, ignore that. - */ - data.coefficients_overridden = !data.coefficients_overridden; - pm->repeat = data.coefficients_overridden != 0; - } - - else - data.coefficients_overridden = random_choice(); - - if (data.coefficients_overridden) - { - /* These values override the color encoding defaults, simply use random - * numbers. - */ - png_uint_32 ru; - double total; - - ru = random_u32(); - data.green_coefficient = total = (ru & 0xffff) / 65535.; - ru >>= 16; - data.red_coefficient = (1 - total) * (ru & 0xffff) / 65535.; - total += data.red_coefficient; - data.blue_coefficient = 1 - total; - -# ifdef PNG_FLOATING_POINT_SUPPORTED - data.red_to_set = data.red_coefficient; - data.green_to_set = data.green_coefficient; -# else - data.red_to_set = fix(data.red_coefficient); - data.green_to_set = fix(data.green_coefficient); -# endif - - /* The following just changes the error messages: */ - pm->encoding_ignored = 1; - } - - else - { - data.red_to_set = -1; - data.green_to_set = -1; - } - - /* Adjust the error limit in the png_modifier because of the larger errors - * produced in the digitization during the gamma handling. - */ - if (data.gamma != 1) /* Use gamma tables */ - { - if (that->this.bit_depth == 16 || pm->assume_16_bit_calculations) - { - /* The computations have the form: - * - * r * rc + g * gc + b * bc - * - * Each component of which is +/-1/65535 from the gamma_to_1 table - * lookup, resulting in a base error of +/-6. The gamma_from_1 - * conversion adds another +/-2 in the 16-bit case and - * +/-(1<<(15-PNG_MAX_GAMMA_8)) in the 8-bit case. - */ -# if PNG_LIBPNG_VER < 10700 - if (that->this.bit_depth < 16) - that->max_gamma_8 = PNG_MAX_GAMMA_8; -# endif - that->pm->limit += pow( - (that->this.bit_depth == 16 || that->max_gamma_8 > 14 ? - 8. : - 6. + (1<<(15-that->max_gamma_8)) - )/65535, data.gamma); - } - - else - { - /* Rounding to 8 bits in the linear space causes massive errors which - * will trigger the error check in transform_range_check. Fix that - * here by taking the gamma encoding into account. - * - * When DIGITIZE is set because a pre-1.7 version of libpng is being - * tested allow a bigger slack. - * - * NOTE: this number only affects the internal limit check in pngvalid, - * it has no effect on the limits applied to the libpng values. - */ -#if DIGITIZE - that->pm->limit += pow( 2.0/255, data.gamma); -#else - that->pm->limit += pow( 1.0/255, data.gamma); -#endif - } - } - - else - { - /* With no gamma correction a large error comes from the truncation of the - * calculation in the 8 bit case, allow for that here. - */ - if (that->this.bit_depth != 16 && !pm->assume_16_bit_calculations) - that->pm->limit += 4E-3; - } -} - -static void -image_transform_png_set_rgb_to_gray_set(const image_transform *this, - transform_display *that, png_structp pp, png_infop pi) -{ - int error_action = 1; /* no error, no defines in png.h */ - -# ifdef PNG_FLOATING_POINT_SUPPORTED - png_set_rgb_to_gray(pp, error_action, data.red_to_set, data.green_to_set); -# else - png_set_rgb_to_gray_fixed(pp, error_action, data.red_to_set, - data.green_to_set); -# endif - -# ifdef PNG_READ_cHRM_SUPPORTED - if (that->pm->current_encoding != 0) - { - /* We have an encoding so a cHRM chunk may have been set; if so then - * check that the libpng APIs give the correct (X,Y,Z) values within - * some margin of error for the round trip through the chromaticity - * form. - */ -# ifdef PNG_FLOATING_POINT_SUPPORTED -# define API_function png_get_cHRM_XYZ -# define API_form "FP" -# define API_type double -# define API_cvt(x) (x) -# else -# define API_function png_get_cHRM_XYZ_fixed -# define API_form "fixed" -# define API_type png_fixed_point -# define API_cvt(x) ((double)(x)/PNG_FP_1) -# endif - - API_type rX, gX, bX; - API_type rY, gY, bY; - API_type rZ, gZ, bZ; - - if ((API_function(pp, pi, &rX, &rY, &rZ, &gX, &gY, &gZ, &bX, &bY, &bZ) - & PNG_INFO_cHRM) != 0) - { - double maxe; - const char *el; - color_encoding e, o; - - /* Expect libpng to return a normalized result, but the original - * color space encoding may not be normalized. - */ - modifier_current_encoding(that->pm, &o); - normalize_color_encoding(&o); - - /* Sanity check the pngvalid code - the coefficients should match - * the normalized Y values of the encoding unless they were - * overridden. - */ - if (data.red_to_set == -1 && data.green_to_set == -1 && - (fabs(o.red.Y - data.red_coefficient) > DBL_EPSILON || - fabs(o.green.Y - data.green_coefficient) > DBL_EPSILON || - fabs(o.blue.Y - data.blue_coefficient) > DBL_EPSILON)) - png_error(pp, "internal pngvalid cHRM coefficient error"); - - /* Generate a colour space encoding. */ - e.gamma = o.gamma; /* not used */ - e.red.X = API_cvt(rX); - e.red.Y = API_cvt(rY); - e.red.Z = API_cvt(rZ); - e.green.X = API_cvt(gX); - e.green.Y = API_cvt(gY); - e.green.Z = API_cvt(gZ); - e.blue.X = API_cvt(bX); - e.blue.Y = API_cvt(bY); - e.blue.Z = API_cvt(bZ); - - /* This should match the original one from the png_modifier, within - * the range permitted by the libpng fixed point representation. - */ - maxe = 0; - el = "-"; /* Set to element name with error */ - -# define CHECK(col,x)\ - {\ - double err = fabs(o.col.x - e.col.x);\ - if (err > maxe)\ - {\ - maxe = err;\ - el = #col "(" #x ")";\ - }\ - } - - CHECK(red,X) - CHECK(red,Y) - CHECK(red,Z) - CHECK(green,X) - CHECK(green,Y) - CHECK(green,Z) - CHECK(blue,X) - CHECK(blue,Y) - CHECK(blue,Z) - - /* Here in both fixed and floating cases to check the values read - * from the cHRm chunk. PNG uses fixed point in the cHRM chunk, so - * we can't expect better than +/-.5E-5 on the result, allow 1E-5. - */ - if (maxe >= 1E-5) - { - size_t pos = 0; - char buffer[256]; - - pos = safecat(buffer, sizeof buffer, pos, API_form); - pos = safecat(buffer, sizeof buffer, pos, " cHRM "); - pos = safecat(buffer, sizeof buffer, pos, el); - pos = safecat(buffer, sizeof buffer, pos, " error: "); - pos = safecatd(buffer, sizeof buffer, pos, maxe, 7); - pos = safecat(buffer, sizeof buffer, pos, " "); - /* Print the color space without the gamma value: */ - pos = safecat_color_encoding(buffer, sizeof buffer, pos, &o, 0); - pos = safecat(buffer, sizeof buffer, pos, " -> "); - pos = safecat_color_encoding(buffer, sizeof buffer, pos, &e, 0); - - png_error(pp, buffer); - } - } - } -# endif /* READ_cHRM */ - - this->next->set(this->next, that, pp, pi); -} - -static void -image_transform_png_set_rgb_to_gray_mod(const image_transform *this, - image_pixel *that, png_const_structp pp, - const transform_display *display) -{ - if ((that->colour_type & PNG_COLOR_MASK_COLOR) != 0) - { - double gray, err; - -# if PNG_LIBPNG_VER < 10700 - if (that->colour_type == PNG_COLOR_TYPE_PALETTE) - image_pixel_convert_PLTE(that); -# endif - - /* Image now has RGB channels... */ -# if DIGITIZE - { - png_modifier *pm = display->pm; - unsigned int sample_depth = that->sample_depth; - unsigned int calc_depth = (pm->assume_16_bit_calculations ? 16 : - sample_depth); - unsigned int gamma_depth = - (sample_depth == 16 ? - display->max_gamma_8 : - (pm->assume_16_bit_calculations ? - display->max_gamma_8 : - sample_depth)); - int isgray; - double r, g, b; - double rlo, rhi, glo, ghi, blo, bhi, graylo, grayhi; - - /* Do this using interval arithmetic, otherwise it is too difficult to - * handle the errors correctly. - * - * To handle the gamma correction work out the upper and lower bounds - * of the digitized value. Assume rounding here - normally the values - * will be identical after this operation if there is only one - * transform, feel free to delete the png_error checks on this below in - * the future (this is just me trying to ensure it works!) - * - * Interval arithmetic is exact, but to implement it it must be - * possible to control the floating point implementation rounding mode. - * This cannot be done in ANSI-C, so instead I reduce the 'lo' values - * by DBL_EPSILON and increase the 'hi' values by the same. - */ -# define DD(v,d,r) (digitize(v*(1-DBL_EPSILON), d, r) * (1-DBL_EPSILON)) -# define DU(v,d,r) (digitize(v*(1+DBL_EPSILON), d, r) * (1+DBL_EPSILON)) - - r = rlo = rhi = that->redf; - rlo -= that->rede; - rlo = DD(rlo, calc_depth, 1/*round*/); - rhi += that->rede; - rhi = DU(rhi, calc_depth, 1/*round*/); - - g = glo = ghi = that->greenf; - glo -= that->greene; - glo = DD(glo, calc_depth, 1/*round*/); - ghi += that->greene; - ghi = DU(ghi, calc_depth, 1/*round*/); - - b = blo = bhi = that->bluef; - blo -= that->bluee; - blo = DD(blo, calc_depth, 1/*round*/); - bhi += that->bluee; - bhi = DU(bhi, calc_depth, 1/*round*/); - - isgray = r==g && g==b; - - if (data.gamma != 1) - { - const double power = 1/data.gamma; - const double abse = .5/(sample_depth == 16 ? 65535 : 255); - - /* If a gamma calculation is done it is done using lookup tables of - * precision gamma_depth, so the already digitized value above may - * need to be further digitized here. - */ - if (gamma_depth != calc_depth) - { - rlo = DD(rlo, gamma_depth, 0/*truncate*/); - rhi = DU(rhi, gamma_depth, 0/*truncate*/); - glo = DD(glo, gamma_depth, 0/*truncate*/); - ghi = DU(ghi, gamma_depth, 0/*truncate*/); - blo = DD(blo, gamma_depth, 0/*truncate*/); - bhi = DU(bhi, gamma_depth, 0/*truncate*/); - } - - /* 'abse' is the error in the gamma table calculation itself. */ - r = pow(r, power); - rlo = DD(pow(rlo, power)-abse, calc_depth, 1); - rhi = DU(pow(rhi, power)+abse, calc_depth, 1); - - g = pow(g, power); - glo = DD(pow(glo, power)-abse, calc_depth, 1); - ghi = DU(pow(ghi, power)+abse, calc_depth, 1); - - b = pow(b, power); - blo = DD(pow(blo, power)-abse, calc_depth, 1); - bhi = DU(pow(bhi, power)+abse, calc_depth, 1); - } - - /* Now calculate the actual gray values. Although the error in the - * coefficients depends on whether they were specified on the command - * line (in which case truncation to 15 bits happened) or not (rounding - * was used) the maximum error in an individual coefficient is always - * 2/32768, because even in the rounding case the requirement that - * coefficients add up to 32768 can cause a larger rounding error. - * - * The only time when rounding doesn't occur in 1.5.5 and later is when - * the non-gamma code path is used for less than 16 bit data. - */ - gray = r * data.red_coefficient + g * data.green_coefficient + - b * data.blue_coefficient; - - { - int do_round = data.gamma != 1 || calc_depth == 16; - const double ce = 2. / 32768; - - graylo = DD(rlo * (data.red_coefficient-ce) + - glo * (data.green_coefficient-ce) + - blo * (data.blue_coefficient-ce), calc_depth, do_round); - if (graylo > gray) /* always accept the right answer */ - graylo = gray; - - grayhi = DU(rhi * (data.red_coefficient+ce) + - ghi * (data.green_coefficient+ce) + - bhi * (data.blue_coefficient+ce), calc_depth, do_round); - if (grayhi < gray) - grayhi = gray; - } - - /* And invert the gamma. */ - if (data.gamma != 1) - { - const double power = data.gamma; - - /* And this happens yet again, shifting the values once more. */ - if (gamma_depth != sample_depth) - { - rlo = DD(rlo, gamma_depth, 0/*truncate*/); - rhi = DU(rhi, gamma_depth, 0/*truncate*/); - glo = DD(glo, gamma_depth, 0/*truncate*/); - ghi = DU(ghi, gamma_depth, 0/*truncate*/); - blo = DD(blo, gamma_depth, 0/*truncate*/); - bhi = DU(bhi, gamma_depth, 0/*truncate*/); - } - - gray = pow(gray, power); - graylo = DD(pow(graylo, power), sample_depth, 1); - grayhi = DU(pow(grayhi, power), sample_depth, 1); - } - -# undef DD -# undef DU - - /* Now the error can be calculated. - * - * If r==g==b because there is no overall gamma correction libpng - * currently preserves the original value. - */ - if (isgray) - err = (that->rede + that->greene + that->bluee)/3; - - else - { - err = fabs(grayhi-gray); - - if (fabs(gray - graylo) > err) - err = fabs(graylo-gray); - -#if !RELEASE_BUILD - /* Check that this worked: */ - if (err > pm->limit) - { - size_t pos = 0; - char buffer[128]; - - pos = safecat(buffer, sizeof buffer, pos, "rgb_to_gray error "); - pos = safecatd(buffer, sizeof buffer, pos, err, 6); - pos = safecat(buffer, sizeof buffer, pos, " exceeds limit "); - pos = safecatd(buffer, sizeof buffer, pos, pm->limit, 6); - png_warning(pp, buffer); - pm->limit = err; - } -#endif /* !RELEASE_BUILD */ - } - } -# else /* !DIGITIZE */ - { - double r = that->redf; - double re = that->rede; - double g = that->greenf; - double ge = that->greene; - double b = that->bluef; - double be = that->bluee; - -# if PNG_LIBPNG_VER < 10700 - /* The true gray case involves no math in earlier versions (not - * true, there was some if gamma correction was happening too.) - */ - if (r == g && r == b) - { - gray = r; - err = re; - if (err < ge) err = ge; - if (err < be) err = be; - } - - else -# endif /* before 1.7 */ - if (data.gamma == 1) - { - /* There is no need to do the conversions to and from linear space, - * so the calculation should be a lot more accurate. There is a - * built in error in the coefficients because they only have 15 bits - * and are adjusted to make sure they add up to 32768. This - * involves a integer calculation with truncation of the form: - * - * ((int)(coefficient * 100000) * 32768)/100000 - * - * This is done to the red and green coefficients (the ones - * provided to the API) then blue is calculated from them so the - * result adds up to 32768. In the worst case this can result in - * a -1 error in red and green and a +2 error in blue. Consequently - * the worst case in the calculation below is 2/32768 error. - * - * TODO: consider fixing this in libpng by rounding the calculation - * limiting the error to 1/32768. - * - * Handling this by adding 2/32768 here avoids needing to increase - * the global error limits to take this into account.) - */ - gray = r * data.red_coefficient + g * data.green_coefficient + - b * data.blue_coefficient; - err = re * data.red_coefficient + ge * data.green_coefficient + - be * data.blue_coefficient + 2./32768 + gray * 5 * DBL_EPSILON; - } - - else - { - /* The calculation happens in linear space, and this produces much - * wider errors in the encoded space. These are handled here by - * factoring the errors in to the calculation. There are two table - * lookups in the calculation and each introduces a quantization - * error defined by the table size. - */ - png_modifier *pm = display->pm; - double in_qe = (that->sample_depth > 8 ? .5/65535 : .5/255); - double out_qe = (that->sample_depth > 8 ? .5/65535 : - (pm->assume_16_bit_calculations ? .5/(1<max_gamma_8) : - .5/255)); - double rhi, ghi, bhi, grayhi; - double g1 = 1/data.gamma; - - rhi = r + re + in_qe; if (rhi > 1) rhi = 1; - r -= re + in_qe; if (r < 0) r = 0; - ghi = g + ge + in_qe; if (ghi > 1) ghi = 1; - g -= ge + in_qe; if (g < 0) g = 0; - bhi = b + be + in_qe; if (bhi > 1) bhi = 1; - b -= be + in_qe; if (b < 0) b = 0; - - r = pow(r, g1)*(1-DBL_EPSILON); rhi = pow(rhi, g1)*(1+DBL_EPSILON); - g = pow(g, g1)*(1-DBL_EPSILON); ghi = pow(ghi, g1)*(1+DBL_EPSILON); - b = pow(b, g1)*(1-DBL_EPSILON); bhi = pow(bhi, g1)*(1+DBL_EPSILON); - - /* Work out the lower and upper bounds for the gray value in the - * encoded space, then work out an average and error. Remove the - * previously added input quantization error at this point. - */ - gray = r * data.red_coefficient + g * data.green_coefficient + - b * data.blue_coefficient - 2./32768 - out_qe; - if (gray <= 0) - gray = 0; - else - { - gray *= (1 - 6 * DBL_EPSILON); - gray = pow(gray, data.gamma) * (1-DBL_EPSILON); - } - - grayhi = rhi * data.red_coefficient + ghi * data.green_coefficient + - bhi * data.blue_coefficient + 2./32768 + out_qe; - grayhi *= (1 + 6 * DBL_EPSILON); - if (grayhi >= 1) - grayhi = 1; - else - grayhi = pow(grayhi, data.gamma) * (1+DBL_EPSILON); - - err = (grayhi - gray) / 2; - gray = (grayhi + gray) / 2; - - if (err <= in_qe) - err = gray * DBL_EPSILON; - - else - err -= in_qe; - -#if !RELEASE_BUILD - /* Validate that the error is within limits (this has caused - * problems before, it's much easier to detect them here.) - */ - if (err > pm->limit) - { - size_t pos = 0; - char buffer[128]; - - pos = safecat(buffer, sizeof buffer, pos, "rgb_to_gray error "); - pos = safecatd(buffer, sizeof buffer, pos, err, 6); - pos = safecat(buffer, sizeof buffer, pos, " exceeds limit "); - pos = safecatd(buffer, sizeof buffer, pos, pm->limit, 6); - png_warning(pp, buffer); - pm->limit = err; - } -#endif /* !RELEASE_BUILD */ - } - } -# endif /* !DIGITIZE */ - - that->bluef = that->greenf = that->redf = gray; - that->bluee = that->greene = that->rede = err; - - /* The sBIT is the minimum of the three colour channel sBITs. */ - if (that->red_sBIT > that->green_sBIT) - that->red_sBIT = that->green_sBIT; - if (that->red_sBIT > that->blue_sBIT) - that->red_sBIT = that->blue_sBIT; - that->blue_sBIT = that->green_sBIT = that->red_sBIT; - - /* And remove the colour bit in the type: */ - if (that->colour_type == PNG_COLOR_TYPE_RGB) - that->colour_type = PNG_COLOR_TYPE_GRAY; - else if (that->colour_type == PNG_COLOR_TYPE_RGB_ALPHA) - that->colour_type = PNG_COLOR_TYPE_GRAY_ALPHA; - } - - this->next->mod(this->next, that, pp, display); -} - -static int -image_transform_png_set_rgb_to_gray_add(image_transform *this, - const image_transform **that, png_byte colour_type, png_byte bit_depth) -{ - UNUSED(bit_depth) - - this->next = *that; - *that = this; - - return (colour_type & PNG_COLOR_MASK_COLOR) != 0; -} - -#undef data -IT(rgb_to_gray); -#undef PT -#define PT ITSTRUCT(rgb_to_gray) -#undef image_transform_ini -#define image_transform_ini image_transform_default_ini -#endif /* PNG_READ_RGB_TO_GRAY_SUPPORTED */ - -#ifdef PNG_READ_BACKGROUND_SUPPORTED -/* png_set_background(png_structp, png_const_color_16p background_color, - * int background_gamma_code, int need_expand, double background_gamma) - * png_set_background_fixed(png_structp, png_const_color_16p background_color, - * int background_gamma_code, int need_expand, - * png_fixed_point background_gamma) - * - * This ignores the gamma (at present.) -*/ -#define data ITDATA(background) -static image_pixel data; - -static void -image_transform_png_set_background_set(const image_transform *this, - transform_display *that, png_structp pp, png_infop pi) -{ - png_byte colour_type, bit_depth; - png_byte random_bytes[8]; /* 8 bytes - 64 bits - the biggest pixel */ - int expand; - png_color_16 back; - - /* We need a background colour, because we don't know exactly what transforms - * have been set we have to supply the colour in the original file format and - * so we need to know what that is! The background colour is stored in the - * transform_display. - */ - R8(random_bytes); - - /* Read the random value, for colour type 3 the background colour is actually - * expressed as a 24bit rgb, not an index. - */ - colour_type = that->this.colour_type; - if (colour_type == 3) - { - colour_type = PNG_COLOR_TYPE_RGB; - bit_depth = 8; - expand = 0; /* passing in an RGB not a pixel index */ - } - - else - { - if (that->this.has_tRNS) - that->this.is_transparent = 1; - - bit_depth = that->this.bit_depth; - expand = 1; - } - - image_pixel_init(&data, random_bytes, colour_type, - bit_depth, 0/*x*/, 0/*unused: palette*/, NULL/*format*/); - - /* Extract the background colour from this image_pixel, but make sure the - * unused fields of 'back' are garbage. - */ - R8(back); - - if (colour_type & PNG_COLOR_MASK_COLOR) - { - back.red = (png_uint_16)data.red; - back.green = (png_uint_16)data.green; - back.blue = (png_uint_16)data.blue; - } - - else - back.gray = (png_uint_16)data.red; - -#ifdef PNG_FLOATING_POINT_SUPPORTED - png_set_background(pp, &back, PNG_BACKGROUND_GAMMA_FILE, expand, 0); -#else - png_set_background_fixed(pp, &back, PNG_BACKGROUND_GAMMA_FILE, expand, 0); -#endif - - this->next->set(this->next, that, pp, pi); -} - -static void -image_transform_png_set_background_mod(const image_transform *this, - image_pixel *that, png_const_structp pp, - const transform_display *display) -{ - /* Check for tRNS first: */ - if (that->have_tRNS && that->colour_type != PNG_COLOR_TYPE_PALETTE) - image_pixel_add_alpha(that, &display->this, 1/*for background*/); - - /* This is only necessary if the alpha value is less than 1. */ - if (that->alphaf < 1) - { - /* Now we do the background calculation without any gamma correction. */ - if (that->alphaf <= 0) - { - that->redf = data.redf; - that->greenf = data.greenf; - that->bluef = data.bluef; - - that->rede = data.rede; - that->greene = data.greene; - that->bluee = data.bluee; - - that->red_sBIT= data.red_sBIT; - that->green_sBIT= data.green_sBIT; - that->blue_sBIT= data.blue_sBIT; - } - - else /* 0 < alpha < 1 */ - { - double alf = 1 - that->alphaf; - - that->redf = that->redf * that->alphaf + data.redf * alf; - that->rede = that->rede * that->alphaf + data.rede * alf + - DBL_EPSILON; - that->greenf = that->greenf * that->alphaf + data.greenf * alf; - that->greene = that->greene * that->alphaf + data.greene * alf + - DBL_EPSILON; - that->bluef = that->bluef * that->alphaf + data.bluef * alf; - that->bluee = that->bluee * that->alphaf + data.bluee * alf + - DBL_EPSILON; - } - - /* Remove the alpha type and set the alpha (not in that order.) */ - that->alphaf = 1; - that->alphae = 0; - } - - if (that->colour_type == PNG_COLOR_TYPE_RGB_ALPHA) - that->colour_type = PNG_COLOR_TYPE_RGB; - else if (that->colour_type == PNG_COLOR_TYPE_GRAY_ALPHA) - that->colour_type = PNG_COLOR_TYPE_GRAY; - /* PNG_COLOR_TYPE_PALETTE is not changed */ - - this->next->mod(this->next, that, pp, display); -} - -#define image_transform_png_set_background_add image_transform_default_add - -#undef data -IT(background); -#undef PT -#define PT ITSTRUCT(background) -#endif /* PNG_READ_BACKGROUND_SUPPORTED */ - -/* png_set_quantize(png_structp, png_colorp palette, int num_palette, - * int maximum_colors, png_const_uint_16p histogram, int full_quantize) - * - * Very difficult to validate this! - */ -/*NOTE: TBD NYI */ - -/* The data layout transforms are handled by swapping our own channel data, - * necessarily these need to happen at the end of the transform list because the - * semantic of the channels changes after these are executed. Some of these, - * like set_shift and set_packing, can't be done at present because they change - * the layout of the data at the sub-sample level so sample() won't get the - * right answer. - */ -/* png_set_invert_alpha */ -#ifdef PNG_READ_INVERT_ALPHA_SUPPORTED -/* Invert the alpha channel - * - * png_set_invert_alpha(png_structrp png_ptr) - */ -static void -image_transform_png_set_invert_alpha_set(const image_transform *this, - transform_display *that, png_structp pp, png_infop pi) -{ - png_set_invert_alpha(pp); - this->next->set(this->next, that, pp, pi); -} - -static void -image_transform_png_set_invert_alpha_mod(const image_transform *this, - image_pixel *that, png_const_structp pp, - const transform_display *display) -{ - if (that->colour_type & 4) - that->alpha_inverted = 1; - - this->next->mod(this->next, that, pp, display); -} - -static int -image_transform_png_set_invert_alpha_add(image_transform *this, - const image_transform **that, png_byte colour_type, png_byte bit_depth) -{ - UNUSED(bit_depth) - - this->next = *that; - *that = this; - - /* Only has an effect on pixels with alpha: */ - return (colour_type & 4) != 0; -} - -IT(invert_alpha); -#undef PT -#define PT ITSTRUCT(invert_alpha) - -#endif /* PNG_READ_INVERT_ALPHA_SUPPORTED */ - -/* png_set_bgr */ -#ifdef PNG_READ_BGR_SUPPORTED -/* Swap R,G,B channels to order B,G,R. - * - * png_set_bgr(png_structrp png_ptr) - * - * This only has an effect on RGB and RGBA pixels. - */ -static void -image_transform_png_set_bgr_set(const image_transform *this, - transform_display *that, png_structp pp, png_infop pi) -{ - png_set_bgr(pp); - this->next->set(this->next, that, pp, pi); -} - -static void -image_transform_png_set_bgr_mod(const image_transform *this, - image_pixel *that, png_const_structp pp, - const transform_display *display) -{ - if (that->colour_type == PNG_COLOR_TYPE_RGB || - that->colour_type == PNG_COLOR_TYPE_RGBA) - that->swap_rgb = 1; - - this->next->mod(this->next, that, pp, display); -} - -static int -image_transform_png_set_bgr_add(image_transform *this, - const image_transform **that, png_byte colour_type, png_byte bit_depth) -{ - UNUSED(bit_depth) - - this->next = *that; - *that = this; - - return colour_type == PNG_COLOR_TYPE_RGB || - colour_type == PNG_COLOR_TYPE_RGBA; -} - -IT(bgr); -#undef PT -#define PT ITSTRUCT(bgr) - -#endif /* PNG_READ_BGR_SUPPORTED */ - -/* png_set_swap_alpha */ -#ifdef PNG_READ_SWAP_ALPHA_SUPPORTED -/* Put the alpha channel first. - * - * png_set_swap_alpha(png_structrp png_ptr) - * - * This only has an effect on GA and RGBA pixels. - */ -static void -image_transform_png_set_swap_alpha_set(const image_transform *this, - transform_display *that, png_structp pp, png_infop pi) -{ - png_set_swap_alpha(pp); - this->next->set(this->next, that, pp, pi); -} - -static void -image_transform_png_set_swap_alpha_mod(const image_transform *this, - image_pixel *that, png_const_structp pp, - const transform_display *display) -{ - if (that->colour_type == PNG_COLOR_TYPE_GA || - that->colour_type == PNG_COLOR_TYPE_RGBA) - that->alpha_first = 1; - - this->next->mod(this->next, that, pp, display); -} - -static int -image_transform_png_set_swap_alpha_add(image_transform *this, - const image_transform **that, png_byte colour_type, png_byte bit_depth) -{ - UNUSED(bit_depth) - - this->next = *that; - *that = this; - - return colour_type == PNG_COLOR_TYPE_GA || - colour_type == PNG_COLOR_TYPE_RGBA; -} - -IT(swap_alpha); -#undef PT -#define PT ITSTRUCT(swap_alpha) - -#endif /* PNG_READ_SWAP_ALPHA_SUPPORTED */ - -/* png_set_swap */ -#ifdef PNG_READ_SWAP_SUPPORTED -/* Byte swap 16-bit components. - * - * png_set_swap(png_structrp png_ptr) - */ -static void -image_transform_png_set_swap_set(const image_transform *this, - transform_display *that, png_structp pp, png_infop pi) -{ - png_set_swap(pp); - this->next->set(this->next, that, pp, pi); -} - -static void -image_transform_png_set_swap_mod(const image_transform *this, - image_pixel *that, png_const_structp pp, - const transform_display *display) -{ - if (that->bit_depth == 16) - that->swap16 = 1; - - this->next->mod(this->next, that, pp, display); -} - -static int -image_transform_png_set_swap_add(image_transform *this, - const image_transform **that, png_byte colour_type, png_byte bit_depth) -{ - UNUSED(colour_type) - - this->next = *that; - *that = this; - - return bit_depth == 16; -} - -IT(swap); -#undef PT -#define PT ITSTRUCT(swap) - -#endif /* PNG_READ_SWAP_SUPPORTED */ - -#ifdef PNG_READ_FILLER_SUPPORTED -/* Add a filler byte to 8-bit Gray or 24-bit RGB images. - * - * png_set_filler, (png_structp png_ptr, png_uint_32 filler, int flags)); - * - * Flags: - * - * PNG_FILLER_BEFORE - * PNG_FILLER_AFTER - */ -#define data ITDATA(filler) -static struct -{ - png_uint_32 filler; - int flags; -} data; - -static void -image_transform_png_set_filler_set(const image_transform *this, - transform_display *that, png_structp pp, png_infop pi) -{ - /* Need a random choice for 'before' and 'after' as well as for the - * filler. The 'filler' value has all 32 bits set, but only bit_depth - * will be used. At this point we don't know bit_depth. - */ - data.filler = random_u32(); - data.flags = random_choice(); - - png_set_filler(pp, data.filler, data.flags); - - /* The standard display handling stuff also needs to know that - * there is a filler, so set that here. - */ - that->this.filler = 1; - - this->next->set(this->next, that, pp, pi); -} - -static void -image_transform_png_set_filler_mod(const image_transform *this, - image_pixel *that, png_const_structp pp, - const transform_display *display) -{ - if (that->bit_depth >= 8 && - (that->colour_type == PNG_COLOR_TYPE_RGB || - that->colour_type == PNG_COLOR_TYPE_GRAY)) - { - unsigned int max = (1U << that->bit_depth)-1; - that->alpha = data.filler & max; - that->alphaf = ((double)that->alpha) / max; - that->alphae = 0; - - /* The filler has been stored in the alpha channel, we must record - * that this has been done for the checking later on, the color - * type is faked to have an alpha channel, but libpng won't report - * this; the app has to know the extra channel is there and this - * was recording in standard_display::filler above. - */ - that->colour_type |= 4; /* alpha added */ - that->alpha_first = data.flags == PNG_FILLER_BEFORE; - } - - this->next->mod(this->next, that, pp, display); -} - -static int -image_transform_png_set_filler_add(image_transform *this, - const image_transform **that, png_byte colour_type, png_byte bit_depth) -{ - this->next = *that; - *that = this; - - return bit_depth >= 8 && (colour_type == PNG_COLOR_TYPE_RGB || - colour_type == PNG_COLOR_TYPE_GRAY); -} - -#undef data -IT(filler); -#undef PT -#define PT ITSTRUCT(filler) - -/* png_set_add_alpha, (png_structp png_ptr, png_uint_32 filler, int flags)); */ -/* Add an alpha byte to 8-bit Gray or 24-bit RGB images. */ -#define data ITDATA(add_alpha) -static struct -{ - png_uint_32 filler; - int flags; -} data; - -static void -image_transform_png_set_add_alpha_set(const image_transform *this, - transform_display *that, png_structp pp, png_infop pi) -{ - /* Need a random choice for 'before' and 'after' as well as for the - * filler. The 'filler' value has all 32 bits set, but only bit_depth - * will be used. At this point we don't know bit_depth. - */ - data.filler = random_u32(); - data.flags = random_choice(); - - png_set_add_alpha(pp, data.filler, data.flags); - this->next->set(this->next, that, pp, pi); -} - -static void -image_transform_png_set_add_alpha_mod(const image_transform *this, - image_pixel *that, png_const_structp pp, - const transform_display *display) -{ - if (that->bit_depth >= 8 && - (that->colour_type == PNG_COLOR_TYPE_RGB || - that->colour_type == PNG_COLOR_TYPE_GRAY)) - { - unsigned int max = (1U << that->bit_depth)-1; - that->alpha = data.filler & max; - that->alphaf = ((double)that->alpha) / max; - that->alphae = 0; - - that->colour_type |= 4; /* alpha added */ - that->alpha_first = data.flags == PNG_FILLER_BEFORE; - } - - this->next->mod(this->next, that, pp, display); -} - -static int -image_transform_png_set_add_alpha_add(image_transform *this, - const image_transform **that, png_byte colour_type, png_byte bit_depth) -{ - this->next = *that; - *that = this; - - return bit_depth >= 8 && (colour_type == PNG_COLOR_TYPE_RGB || - colour_type == PNG_COLOR_TYPE_GRAY); -} - -#undef data -IT(add_alpha); -#undef PT -#define PT ITSTRUCT(add_alpha) - -#endif /* PNG_READ_FILLER_SUPPORTED */ - -/* png_set_packing */ -#ifdef PNG_READ_PACK_SUPPORTED -/* Use 1 byte per pixel in 1, 2, or 4-bit depth files. - * - * png_set_packing(png_structrp png_ptr) - * - * This should only affect grayscale and palette images with less than 8 bits - * per pixel. - */ -static void -image_transform_png_set_packing_set(const image_transform *this, - transform_display *that, png_structp pp, png_infop pi) -{ - png_set_packing(pp); - that->unpacked = 1; - this->next->set(this->next, that, pp, pi); -} - -static void -image_transform_png_set_packing_mod(const image_transform *this, - image_pixel *that, png_const_structp pp, - const transform_display *display) -{ - /* The general expand case depends on what the colour type is, - * low bit-depth pixel values are unpacked into bytes without - * scaling, so sample_depth is not changed. - */ - if (that->bit_depth < 8) /* grayscale or palette */ - that->bit_depth = 8; - - this->next->mod(this->next, that, pp, display); -} - -static int -image_transform_png_set_packing_add(image_transform *this, - const image_transform **that, png_byte colour_type, png_byte bit_depth) -{ - UNUSED(colour_type) - - this->next = *that; - *that = this; - - /* Nothing should happen unless the bit depth is less than 8: */ - return bit_depth < 8; -} - -IT(packing); -#undef PT -#define PT ITSTRUCT(packing) - -#endif /* PNG_READ_PACK_SUPPORTED */ - -/* png_set_packswap */ -#ifdef PNG_READ_PACKSWAP_SUPPORTED -/* Swap pixels packed into bytes; reverses the order on screen so that - * the high order bits correspond to the rightmost pixels. - * - * png_set_packswap(png_structrp png_ptr) - */ -static void -image_transform_png_set_packswap_set(const image_transform *this, - transform_display *that, png_structp pp, png_infop pi) -{ - png_set_packswap(pp); - that->this.littleendian = 1; - this->next->set(this->next, that, pp, pi); -} - -static void -image_transform_png_set_packswap_mod(const image_transform *this, - image_pixel *that, png_const_structp pp, - const transform_display *display) -{ - if (that->bit_depth < 8) - that->littleendian = 1; - - this->next->mod(this->next, that, pp, display); -} - -static int -image_transform_png_set_packswap_add(image_transform *this, - const image_transform **that, png_byte colour_type, png_byte bit_depth) -{ - UNUSED(colour_type) - - this->next = *that; - *that = this; - - return bit_depth < 8; -} - -IT(packswap); -#undef PT -#define PT ITSTRUCT(packswap) - -#endif /* PNG_READ_PACKSWAP_SUPPORTED */ - - -/* png_set_invert_mono */ -#ifdef PNG_READ_INVERT_MONO_SUPPORTED -/* Invert the gray channel - * - * png_set_invert_mono(png_structrp png_ptr) - */ -static void -image_transform_png_set_invert_mono_set(const image_transform *this, - transform_display *that, png_structp pp, png_infop pi) -{ - png_set_invert_mono(pp); - this->next->set(this->next, that, pp, pi); -} - -static void -image_transform_png_set_invert_mono_mod(const image_transform *this, - image_pixel *that, png_const_structp pp, - const transform_display *display) -{ - if (that->colour_type & 4) - that->mono_inverted = 1; - - this->next->mod(this->next, that, pp, display); -} - -static int -image_transform_png_set_invert_mono_add(image_transform *this, - const image_transform **that, png_byte colour_type, png_byte bit_depth) -{ - UNUSED(bit_depth) - - this->next = *that; - *that = this; - - /* Only has an effect on pixels with no colour: */ - return (colour_type & 2) == 0; -} - -IT(invert_mono); -#undef PT -#define PT ITSTRUCT(invert_mono) - -#endif /* PNG_READ_INVERT_MONO_SUPPORTED */ - -#ifdef PNG_READ_SHIFT_SUPPORTED -/* png_set_shift(png_structp, png_const_color_8p true_bits) - * - * The output pixels will be shifted by the given true_bits - * values. - */ -#define data ITDATA(shift) -static png_color_8 data; - -static void -image_transform_png_set_shift_set(const image_transform *this, - transform_display *that, png_structp pp, png_infop pi) -{ - /* Get a random set of shifts. The shifts need to do something - * to test the transform, so they are limited to the bit depth - * of the input image. Notice that in the following the 'gray' - * field is randomized independently. This acts as a check that - * libpng does use the correct field. - */ - unsigned int depth = that->this.bit_depth; - - data.red = (png_byte)/*SAFE*/(random_mod(depth)+1); - data.green = (png_byte)/*SAFE*/(random_mod(depth)+1); - data.blue = (png_byte)/*SAFE*/(random_mod(depth)+1); - data.gray = (png_byte)/*SAFE*/(random_mod(depth)+1); - data.alpha = (png_byte)/*SAFE*/(random_mod(depth)+1); - - png_set_shift(pp, &data); - this->next->set(this->next, that, pp, pi); -} - -static void -image_transform_png_set_shift_mod(const image_transform *this, - image_pixel *that, png_const_structp pp, - const transform_display *display) -{ - /* Copy the correct values into the sBIT fields, libpng does not do - * anything to palette data: - */ - if (that->colour_type != PNG_COLOR_TYPE_PALETTE) - { - that->sig_bits = 1; - - /* The sBIT fields are reset to the values previously sent to - * png_set_shift according to the colour type. - * does. - */ - if (that->colour_type & 2) /* RGB channels */ - { - that->red_sBIT = data.red; - that->green_sBIT = data.green; - that->blue_sBIT = data.blue; - } - - else /* One grey channel */ - that->red_sBIT = that->green_sBIT = that->blue_sBIT = data.gray; - - that->alpha_sBIT = data.alpha; - } - - this->next->mod(this->next, that, pp, display); -} - -static int -image_transform_png_set_shift_add(image_transform *this, - const image_transform **that, png_byte colour_type, png_byte bit_depth) -{ - UNUSED(bit_depth) - - this->next = *that; - *that = this; - - return colour_type != PNG_COLOR_TYPE_PALETTE; -} - -IT(shift); -#undef PT -#define PT ITSTRUCT(shift) - -#endif /* PNG_READ_SHIFT_SUPPORTED */ - -#ifdef THIS_IS_THE_PROFORMA -static void -image_transform_png_set_@_set(const image_transform *this, - transform_display *that, png_structp pp, png_infop pi) -{ - png_set_@(pp); - this->next->set(this->next, that, pp, pi); -} - -static void -image_transform_png_set_@_mod(const image_transform *this, - image_pixel *that, png_const_structp pp, - const transform_display *display) -{ - this->next->mod(this->next, that, pp, display); -} - -static int -image_transform_png_set_@_add(image_transform *this, - const image_transform **that, png_byte colour_type, png_byte bit_depth) -{ - this->next = *that; - *that = this; - - return 1; -} - -IT(@); -#endif - - -/* This may just be 'end' if all the transforms are disabled! */ -static image_transform *const image_transform_first = &PT; - -static void -transform_enable(const char *name) -{ - /* Everything starts out enabled, so if we see an 'enable' disabled - * everything else the first time round. - */ - static int all_disabled = 0; - int found_it = 0; - image_transform *list = image_transform_first; - - while (list != &image_transform_end) - { - if (strcmp(list->name, name) == 0) - { - list->enable = 1; - found_it = 1; - } - else if (!all_disabled) - list->enable = 0; - - list = list->list; - } - - all_disabled = 1; - - if (!found_it) - { - fprintf(stderr, "pngvalid: --transform-enable=%s: unknown transform\n", - name); - exit(99); - } -} - -static void -transform_disable(const char *name) -{ - image_transform *list = image_transform_first; - - while (list != &image_transform_end) - { - if (strcmp(list->name, name) == 0) - { - list->enable = 0; - return; - } - - list = list->list; - } - - fprintf(stderr, "pngvalid: --transform-disable=%s: unknown transform\n", - name); - exit(99); -} - -static void -image_transform_reset_count(void) -{ - image_transform *next = image_transform_first; - int count = 0; - - while (next != &image_transform_end) - { - next->local_use = 0; - next->next = 0; - next = next->list; - ++count; - } - - /* This can only happen if we every have more than 32 transforms (excluding - * the end) in the list. - */ - if (count > 32) abort(); -} - -static int -image_transform_test_counter(png_uint_32 counter, unsigned int max) -{ - /* Test the list to see if there is any point contining, given a current - * counter and a 'max' value. - */ - image_transform *next = image_transform_first; - - while (next != &image_transform_end) - { - /* For max 0 or 1 continue until the counter overflows: */ - counter >>= 1; - - /* Continue if any entry hasn't reacked the max. */ - if (max > 1 && next->local_use < max) - return 1; - next = next->list; - } - - return max <= 1 && counter == 0; -} - -static png_uint_32 -image_transform_add(const image_transform **this, unsigned int max, - png_uint_32 counter, char *name, size_t sizeof_name, size_t *pos, - png_byte colour_type, png_byte bit_depth) -{ - for (;;) /* until we manage to add something */ - { - png_uint_32 mask; - image_transform *list; - - /* Find the next counter value, if the counter is zero this is the start - * of the list. This routine always returns the current counter (not the - * next) so it returns 0 at the end and expects 0 at the beginning. - */ - if (counter == 0) /* first time */ - { - image_transform_reset_count(); - if (max <= 1) - counter = 1; - else - counter = random_32(); - } - else /* advance the counter */ - { - switch (max) - { - case 0: ++counter; break; - case 1: counter <<= 1; break; - default: counter = random_32(); break; - } - } - - /* Now add all these items, if possible */ - *this = &image_transform_end; - list = image_transform_first; - mask = 1; - - /* Go through the whole list adding anything that the counter selects: */ - while (list != &image_transform_end) - { - if ((counter & mask) != 0 && list->enable && - (max == 0 || list->local_use < max)) - { - /* Candidate to add: */ - if (list->add(list, this, colour_type, bit_depth) || max == 0) - { - /* Added, so add to the name too. */ - *pos = safecat(name, sizeof_name, *pos, " +"); - *pos = safecat(name, sizeof_name, *pos, list->name); - } - - else - { - /* Not useful and max>0, so remove it from *this: */ - *this = list->next; - list->next = 0; - - /* And, since we know it isn't useful, stop it being added again - * in this run: - */ - list->local_use = max; - } - } - - mask <<= 1; - list = list->list; - } - - /* Now if anything was added we have something to do. */ - if (*this != &image_transform_end) - return counter; - - /* Nothing added, but was there anything in there to add? */ - if (!image_transform_test_counter(counter, max)) - return 0; - } -} - -static void -perform_transform_test(png_modifier *pm) -{ - png_byte colour_type = 0; - png_byte bit_depth = 0; - unsigned int palette_number = 0; - - while (next_format(&colour_type, &bit_depth, &palette_number, pm->test_lbg, - pm->test_tRNS)) - { - png_uint_32 counter = 0; - size_t base_pos; - char name[64]; - - base_pos = safecat(name, sizeof name, 0, "transform:"); - - for (;;) - { - size_t pos = base_pos; - const image_transform *list = 0; - - /* 'max' is currently hardwired to '1'; this should be settable on the - * command line. - */ - counter = image_transform_add(&list, 1/*max*/, counter, - name, sizeof name, &pos, colour_type, bit_depth); - - if (counter == 0) - break; - - /* The command line can change this to checking interlaced images. */ - do - { - pm->repeat = 0; - transform_test(pm, FILEID(colour_type, bit_depth, palette_number, - pm->interlace_type, 0, 0, 0), list, name); - - if (fail(pm)) - return; - } - while (pm->repeat); - } - } -} -#endif /* PNG_READ_TRANSFORMS_SUPPORTED */ - -/********************************* GAMMA TESTS ********************************/ -#ifdef PNG_READ_GAMMA_SUPPORTED -/* Reader callbacks and implementations, where they differ from the standard - * ones. - */ -typedef struct gamma_display -{ - standard_display this; - - /* Parameters */ - png_modifier* pm; - double file_gamma; - double screen_gamma; - double background_gamma; - png_byte sbit; - int threshold_test; - int use_input_precision; - int scale16; - int expand16; - int do_background; - png_color_16 background_color; - - /* Local variables */ - double maxerrout; - double maxerrpc; - double maxerrabs; -} gamma_display; - -#define ALPHA_MODE_OFFSET 4 - -static void -gamma_display_init(gamma_display *dp, png_modifier *pm, png_uint_32 id, - double file_gamma, double screen_gamma, png_byte sbit, int threshold_test, - int use_input_precision, int scale16, int expand16, - int do_background, const png_color_16 *pointer_to_the_background_color, - double background_gamma) -{ - /* Standard fields */ - standard_display_init(&dp->this, &pm->this, id, do_read_interlace, - pm->use_update_info); - - /* Parameter fields */ - dp->pm = pm; - dp->file_gamma = file_gamma; - dp->screen_gamma = screen_gamma; - dp->background_gamma = background_gamma; - dp->sbit = sbit; - dp->threshold_test = threshold_test; - dp->use_input_precision = use_input_precision; - dp->scale16 = scale16; - dp->expand16 = expand16; - dp->do_background = do_background; - if (do_background && pointer_to_the_background_color != 0) - dp->background_color = *pointer_to_the_background_color; - else - memset(&dp->background_color, 0, sizeof dp->background_color); - - /* Local variable fields */ - dp->maxerrout = dp->maxerrpc = dp->maxerrabs = 0; -} - -static void -gamma_info_imp(gamma_display *dp, png_structp pp, png_infop pi) -{ - /* Reuse the standard stuff as appropriate. */ - standard_info_part1(&dp->this, pp, pi); - - /* If requested strip 16 to 8 bits - this is handled automagically below - * because the output bit depth is read from the library. Note that there - * are interactions with sBIT but, internally, libpng makes sbit at most - * PNG_MAX_GAMMA_8 prior to 1.7 when doing the following. - */ - if (dp->scale16) -# ifdef PNG_READ_SCALE_16_TO_8_SUPPORTED - png_set_scale_16(pp); -# else - /* The following works both in 1.5.4 and earlier versions: */ -# ifdef PNG_READ_16_TO_8_SUPPORTED - png_set_strip_16(pp); -# else - png_error(pp, "scale16 (16 to 8 bit conversion) not supported"); -# endif -# endif - - if (dp->expand16) -# ifdef PNG_READ_EXPAND_16_SUPPORTED - png_set_expand_16(pp); -# else - png_error(pp, "expand16 (8 to 16 bit conversion) not supported"); -# endif - - if (dp->do_background >= ALPHA_MODE_OFFSET) - { -# ifdef PNG_READ_ALPHA_MODE_SUPPORTED - { - /* This tests the alpha mode handling, if supported. */ - int mode = dp->do_background - ALPHA_MODE_OFFSET; - - /* The gamma value is the output gamma, and is in the standard, - * non-inverted, representation. It provides a default for the PNG file - * gamma, but since the file has a gAMA chunk this does not matter. - */ - const double sg = dp->screen_gamma; -# ifndef PNG_FLOATING_POINT_SUPPORTED - png_fixed_point g = fix(sg); -# endif - -# ifdef PNG_FLOATING_POINT_SUPPORTED - png_set_alpha_mode(pp, mode, sg); -# else - png_set_alpha_mode_fixed(pp, mode, g); -# endif - - /* However, for the standard Porter-Duff algorithm the output defaults - * to be linear, so if the test requires non-linear output it must be - * corrected here. - */ - if (mode == PNG_ALPHA_STANDARD && sg != 1) - { -# ifdef PNG_FLOATING_POINT_SUPPORTED - png_set_gamma(pp, sg, dp->file_gamma); -# else - png_fixed_point f = fix(dp->file_gamma); - png_set_gamma_fixed(pp, g, f); -# endif - } - } -# else - png_error(pp, "alpha mode handling not supported"); -# endif - } - - else - { - /* Set up gamma processing. */ -# ifdef PNG_FLOATING_POINT_SUPPORTED - png_set_gamma(pp, dp->screen_gamma, dp->file_gamma); -# else - { - png_fixed_point s = fix(dp->screen_gamma); - png_fixed_point f = fix(dp->file_gamma); - png_set_gamma_fixed(pp, s, f); - } -# endif - - if (dp->do_background) - { -# ifdef PNG_READ_BACKGROUND_SUPPORTED - /* NOTE: this assumes the caller provided the correct background gamma! - */ - const double bg = dp->background_gamma; -# ifndef PNG_FLOATING_POINT_SUPPORTED - png_fixed_point g = fix(bg); -# endif - -# ifdef PNG_FLOATING_POINT_SUPPORTED - png_set_background(pp, &dp->background_color, dp->do_background, - 0/*need_expand*/, bg); -# else - png_set_background_fixed(pp, &dp->background_color, - dp->do_background, 0/*need_expand*/, g); -# endif -# else - png_error(pp, "png_set_background not supported"); -# endif - } - } - - { - int i = dp->this.use_update_info; - /* Always do one call, even if use_update_info is 0. */ - do - png_read_update_info(pp, pi); - while (--i > 0); - } - - /* Now we may get a different cbRow: */ - standard_info_part2(&dp->this, pp, pi, 1 /*images*/); -} - -static void PNGCBAPI -gamma_info(png_structp pp, png_infop pi) -{ - gamma_info_imp(voidcast(gamma_display*, png_get_progressive_ptr(pp)), pp, - pi); -} - -/* Validate a single component value - the routine gets the input and output - * sample values as unscaled PNG component values along with a cache of all the - * information required to validate the values. - */ -typedef struct validate_info -{ - png_const_structp pp; - gamma_display *dp; - png_byte sbit; - int use_input_precision; - int do_background; - int scale16; - unsigned int sbit_max; - unsigned int isbit_shift; - unsigned int outmax; - - double gamma_correction; /* Overall correction required. */ - double file_inverse; /* Inverse of file gamma. */ - double screen_gamma; - double screen_inverse; /* Inverse of screen gamma. */ - - double background_red; /* Linear background value, red or gray. */ - double background_green; - double background_blue; - - double maxabs; - double maxpc; - double maxcalc; - double maxout; - double maxout_total; /* Total including quantization error */ - double outlog; - int outquant; -} -validate_info; - -static void -init_validate_info(validate_info *vi, gamma_display *dp, png_const_structp pp, - int in_depth, int out_depth) -{ - unsigned int outmax = (1U<pp = pp; - vi->dp = dp; - - if (dp->sbit > 0 && dp->sbit < in_depth) - { - vi->sbit = dp->sbit; - vi->isbit_shift = in_depth - dp->sbit; - } - - else - { - vi->sbit = (png_byte)in_depth; - vi->isbit_shift = 0; - } - - vi->sbit_max = (1U << vi->sbit)-1; - - /* This mimics the libpng threshold test, '0' is used to prevent gamma - * correction in the validation test. - */ - vi->screen_gamma = dp->screen_gamma; - if (fabs(vi->screen_gamma-1) < PNG_GAMMA_THRESHOLD) - vi->screen_gamma = vi->screen_inverse = 0; - else - vi->screen_inverse = 1/vi->screen_gamma; - - vi->use_input_precision = dp->use_input_precision; - vi->outmax = outmax; - vi->maxabs = abserr(dp->pm, in_depth, out_depth); - vi->maxpc = pcerr(dp->pm, in_depth, out_depth); - vi->maxcalc = calcerr(dp->pm, in_depth, out_depth); - vi->maxout = outerr(dp->pm, in_depth, out_depth); - vi->outquant = output_quantization_factor(dp->pm, in_depth, out_depth); - vi->maxout_total = vi->maxout + vi->outquant * .5; - vi->outlog = outlog(dp->pm, in_depth, out_depth); - - if ((dp->this.colour_type & PNG_COLOR_MASK_ALPHA) != 0 || - (dp->this.colour_type == 3 && dp->this.is_transparent) || - ((dp->this.colour_type == 0 || dp->this.colour_type == 2) && - dp->this.has_tRNS)) - { - vi->do_background = dp->do_background; - - if (vi->do_background != 0) - { - const double bg_inverse = 1/dp->background_gamma; - double r, g, b; - - /* Caller must at least put the gray value into the red channel */ - r = dp->background_color.red; r /= outmax; - g = dp->background_color.green; g /= outmax; - b = dp->background_color.blue; b /= outmax; - -# if 0 - /* libpng doesn't do this optimization, if we do pngvalid will fail. - */ - if (fabs(bg_inverse-1) >= PNG_GAMMA_THRESHOLD) -# endif - { - r = pow(r, bg_inverse); - g = pow(g, bg_inverse); - b = pow(b, bg_inverse); - } - - vi->background_red = r; - vi->background_green = g; - vi->background_blue = b; - } - } - else /* Do not expect any background processing */ - vi->do_background = 0; - - if (vi->do_background == 0) - vi->background_red = vi->background_green = vi->background_blue = 0; - - vi->gamma_correction = 1/(dp->file_gamma*dp->screen_gamma); - if (fabs(vi->gamma_correction-1) < PNG_GAMMA_THRESHOLD) - vi->gamma_correction = 0; - - vi->file_inverse = 1/dp->file_gamma; - if (fabs(vi->file_inverse-1) < PNG_GAMMA_THRESHOLD) - vi->file_inverse = 0; - - vi->scale16 = dp->scale16; -} - -/* This function handles composition of a single non-alpha component. The - * argument is the input sample value, in the range 0..1, and the alpha value. - * The result is the composed, linear, input sample. If alpha is less than zero - * this is the alpha component and the function should not be called! - */ -static double -gamma_component_compose(int do_background, double input_sample, double alpha, - double background, int *compose) -{ - switch (do_background) - { -#ifdef PNG_READ_BACKGROUND_SUPPORTED - case PNG_BACKGROUND_GAMMA_SCREEN: - case PNG_BACKGROUND_GAMMA_FILE: - case PNG_BACKGROUND_GAMMA_UNIQUE: - /* Standard PNG background processing. */ - if (alpha < 1) - { - if (alpha > 0) - { - input_sample = input_sample * alpha + background * (1-alpha); - if (compose != NULL) - *compose = 1; - } - - else - input_sample = background; - } - break; -#endif - -#ifdef PNG_READ_ALPHA_MODE_SUPPORTED - case ALPHA_MODE_OFFSET + PNG_ALPHA_STANDARD: - case ALPHA_MODE_OFFSET + PNG_ALPHA_BROKEN: - /* The components are premultiplied in either case and the output is - * gamma encoded (to get standard Porter-Duff we expect the output - * gamma to be set to 1.0!) - */ - case ALPHA_MODE_OFFSET + PNG_ALPHA_OPTIMIZED: - /* The optimization is that the partial-alpha entries are linear - * while the opaque pixels are gamma encoded, but this only affects the - * output encoding. - */ - if (alpha < 1) - { - if (alpha > 0) - { - input_sample *= alpha; - if (compose != NULL) - *compose = 1; - } - - else - input_sample = 0; - } - break; -#endif - - default: - /* Standard cases where no compositing is done (so the component - * value is already correct.) - */ - UNUSED(alpha) - UNUSED(background) - UNUSED(compose) - break; - } - - return input_sample; -} - -/* This API returns the encoded *input* component, in the range 0..1 */ -static double -gamma_component_validate(const char *name, const validate_info *vi, - unsigned int id, unsigned int od, - const double alpha /* <0 for the alpha channel itself */, - const double background /* component background value */) -{ - unsigned int isbit = id >> vi->isbit_shift; - unsigned int sbit_max = vi->sbit_max; - unsigned int outmax = vi->outmax; - int do_background = vi->do_background; - - double i; - - /* First check on the 'perfect' result obtained from the digitized input - * value, id, and compare this against the actual digitized result, 'od'. - * 'i' is the input result in the range 0..1: - */ - i = isbit; i /= sbit_max; - - /* Check for the fast route: if we don't do any background composition or if - * this is the alpha channel ('alpha' < 0) or if the pixel is opaque then - * just use the gamma_correction field to correct to the final output gamma. - */ - if (alpha == 1 /* opaque pixel component */ || !do_background -#ifdef PNG_READ_ALPHA_MODE_SUPPORTED - || do_background == ALPHA_MODE_OFFSET + PNG_ALPHA_PNG -#endif - || (alpha < 0 /* alpha channel */ -#ifdef PNG_READ_ALPHA_MODE_SUPPORTED - && do_background != ALPHA_MODE_OFFSET + PNG_ALPHA_BROKEN -#endif - )) - { - /* Then get the gamma corrected version of 'i' and compare to 'od', any - * error less than .5 is insignificant - just quantization of the output - * value to the nearest digital value (nevertheless the error is still - * recorded - it's interesting ;-) - */ - double encoded_sample = i; - double encoded_error; - - /* alpha less than 0 indicates the alpha channel, which is always linear - */ - if (alpha >= 0 && vi->gamma_correction > 0) - encoded_sample = pow(encoded_sample, vi->gamma_correction); - encoded_sample *= outmax; - - encoded_error = fabs(od-encoded_sample); - - if (encoded_error > vi->dp->maxerrout) - vi->dp->maxerrout = encoded_error; - - if (encoded_error < vi->maxout_total && encoded_error < vi->outlog) - return i; - } - - /* The slow route - attempt to do linear calculations. */ - /* There may be an error, or background processing is required, so calculate - * the actual sample values - unencoded light intensity values. Note that in - * practice these are not completely unencoded because they include a - * 'viewing correction' to decrease or (normally) increase the perceptual - * contrast of the image. There's nothing we can do about this - we don't - * know what it is - so assume the unencoded value is perceptually linear. - */ - { - double input_sample = i; /* In range 0..1 */ - double output, error, encoded_sample, encoded_error; - double es_lo, es_hi; - int compose = 0; /* Set to one if composition done */ - int output_is_encoded; /* Set if encoded to screen gamma */ - int log_max_error = 1; /* Check maximum error values */ - png_const_charp pass = 0; /* Reason test passes (or 0 for fail) */ - - /* Convert to linear light (with the above caveat.) The alpha channel is - * already linear. - */ - if (alpha >= 0) - { - int tcompose; - - if (vi->file_inverse > 0) - input_sample = pow(input_sample, vi->file_inverse); - - /* Handle the compose processing: */ - tcompose = 0; - input_sample = gamma_component_compose(do_background, input_sample, - alpha, background, &tcompose); - - if (tcompose) - compose = 1; - } - - /* And similarly for the output value, but we need to check the background - * handling to linearize it correctly. - */ - output = od; - output /= outmax; - - output_is_encoded = vi->screen_gamma > 0; - - if (alpha < 0) /* The alpha channel */ - { -#ifdef PNG_READ_ALPHA_MODE_SUPPORTED - if (do_background != ALPHA_MODE_OFFSET + PNG_ALPHA_BROKEN) -#endif - { - /* In all other cases the output alpha channel is linear already, - * don't log errors here, they are much larger in linear data. - */ - output_is_encoded = 0; - log_max_error = 0; - } - } - -#ifdef PNG_READ_ALPHA_MODE_SUPPORTED - else /* A component */ - { - if (do_background == ALPHA_MODE_OFFSET + PNG_ALPHA_OPTIMIZED && - alpha < 1) /* the optimized case - linear output */ - { - if (alpha > 0) log_max_error = 0; - output_is_encoded = 0; - } - } -#endif - - if (output_is_encoded) - output = pow(output, vi->screen_gamma); - - /* Calculate (or recalculate) the encoded_sample value and repeat the - * check above (unnecessary if we took the fast route, but harmless.) - */ - encoded_sample = input_sample; - if (output_is_encoded) - encoded_sample = pow(encoded_sample, vi->screen_inverse); - encoded_sample *= outmax; - - encoded_error = fabs(od-encoded_sample); - - /* Don't log errors in the alpha channel, or the 'optimized' case, - * neither are significant to the overall perception. - */ - if (log_max_error && encoded_error > vi->dp->maxerrout) - vi->dp->maxerrout = encoded_error; - - if (encoded_error < vi->maxout_total) - { - if (encoded_error < vi->outlog) - return i; - - /* Test passed but error is bigger than the log limit, record why the - * test passed: - */ - pass = "less than maxout:\n"; - } - - /* i: the original input value in the range 0..1 - * - * pngvalid calculations: - * input_sample: linear result; i linearized and composed, range 0..1 - * encoded_sample: encoded result; input_sample scaled to output bit depth - * - * libpng calculations: - * output: linear result; od scaled to 0..1 and linearized - * od: encoded result from libpng - */ - - /* Now we have the numbers for real errors, both absolute values as as a - * percentage of the correct value (output): - */ - error = fabs(input_sample-output); - - if (log_max_error && error > vi->dp->maxerrabs) - vi->dp->maxerrabs = error; - - /* The following is an attempt to ignore the tendency of quantization to - * dominate the percentage errors for lower result values: - */ - if (log_max_error && input_sample > .5) - { - double percentage_error = error/input_sample; - if (percentage_error > vi->dp->maxerrpc) - vi->dp->maxerrpc = percentage_error; - } - - /* Now calculate the digitization limits for 'encoded_sample' using the - * 'max' values. Note that maxout is in the encoded space but maxpc and - * maxabs are in linear light space. - * - * First find the maximum error in linear light space, range 0..1: - */ - { - double tmp = input_sample * vi->maxpc; - if (tmp < vi->maxabs) tmp = vi->maxabs; - /* If 'compose' is true the composition was done in linear space using - * integer arithmetic. This introduces an extra error of +/- 0.5 (at - * least) in the integer space used. 'maxcalc' records this, taking - * into account the possibility that even for 16 bit output 8 bit space - * may have been used. - */ - if (compose && tmp < vi->maxcalc) tmp = vi->maxcalc; - - /* The 'maxout' value refers to the encoded result, to compare with - * this encode input_sample adjusted by the maximum error (tmp) above. - */ - es_lo = encoded_sample - vi->maxout; - - if (es_lo > 0 && input_sample-tmp > 0) - { - double low_value = input_sample-tmp; - if (output_is_encoded) - low_value = pow(low_value, vi->screen_inverse); - low_value *= outmax; - if (low_value < es_lo) es_lo = low_value; - - /* Quantize this appropriately: */ - es_lo = ceil(es_lo / vi->outquant - .5) * vi->outquant; - } - - else - es_lo = 0; - - es_hi = encoded_sample + vi->maxout; - - if (es_hi < outmax && input_sample+tmp < 1) - { - double high_value = input_sample+tmp; - if (output_is_encoded) - high_value = pow(high_value, vi->screen_inverse); - high_value *= outmax; - if (high_value > es_hi) es_hi = high_value; - - es_hi = floor(es_hi / vi->outquant + .5) * vi->outquant; - } - - else - es_hi = outmax; - } - - /* The primary test is that the final encoded value returned by the - * library should be between the two limits (inclusive) that were - * calculated above. - */ - if (od >= es_lo && od <= es_hi) - { - /* The value passes, but we may need to log the information anyway. */ - if (encoded_error < vi->outlog) - return i; - - if (pass == 0) - pass = "within digitization limits:\n"; - } - - { - /* There has been an error in processing, or we need to log this - * value. - */ - double is_lo, is_hi; - - /* pass is set at this point if either of the tests above would have - * passed. Don't do these additional tests here - just log the - * original [es_lo..es_hi] values. - */ - if (pass == 0 && vi->use_input_precision && vi->dp->sbit) - { - /* Ok, something is wrong - this actually happens in current libpng - * 16-to-8 processing. Assume that the input value (id, adjusted - * for sbit) can be anywhere between value-.5 and value+.5 - quite a - * large range if sbit is low. - * - * NOTE: at present because the libpng gamma table stuff has been - * changed to use a rounding algorithm to correct errors in 8-bit - * calculations the precise sbit calculation (a shift) has been - * lost. This can result in up to a +/-1 error in the presence of - * an sbit less than the bit depth. - */ -# if PNG_LIBPNG_VER < 10700 -# define SBIT_ERROR .5 -# else -# define SBIT_ERROR 1. -# endif - double tmp = (isbit - SBIT_ERROR)/sbit_max; - - if (tmp <= 0) - tmp = 0; - - else if (alpha >= 0 && vi->file_inverse > 0 && tmp < 1) - tmp = pow(tmp, vi->file_inverse); - - tmp = gamma_component_compose(do_background, tmp, alpha, background, - NULL); - - if (output_is_encoded && tmp > 0 && tmp < 1) - tmp = pow(tmp, vi->screen_inverse); - - is_lo = ceil(outmax * tmp - vi->maxout_total); - - if (is_lo < 0) - is_lo = 0; - - tmp = (isbit + SBIT_ERROR)/sbit_max; - - if (tmp >= 1) - tmp = 1; - - else if (alpha >= 0 && vi->file_inverse > 0 && tmp < 1) - tmp = pow(tmp, vi->file_inverse); - - tmp = gamma_component_compose(do_background, tmp, alpha, background, - NULL); - - if (output_is_encoded && tmp > 0 && tmp < 1) - tmp = pow(tmp, vi->screen_inverse); - - is_hi = floor(outmax * tmp + vi->maxout_total); - - if (is_hi > outmax) - is_hi = outmax; - - if (!(od < is_lo || od > is_hi)) - { - if (encoded_error < vi->outlog) - return i; - - pass = "within input precision limits:\n"; - } - - /* One last chance. If this is an alpha channel and the 16to8 - * option has been used and 'inaccurate' scaling is used then the - * bit reduction is obtained by simply using the top 8 bits of the - * value. - * - * This is only done for older libpng versions when the 'inaccurate' - * (chop) method of scaling was used. - */ -# ifndef PNG_READ_16_TO_8_ACCURATE_SCALE_SUPPORTED -# if PNG_LIBPNG_VER < 10504 - /* This may be required for other components in the future, - * but at present the presence of gamma correction effectively - * prevents the errors in the component scaling (I don't quite - * understand why, but since it's better this way I care not - * to ask, JB 20110419.) - */ - if (pass == 0 && alpha < 0 && vi->scale16 && vi->sbit > 8 && - vi->sbit + vi->isbit_shift == 16) - { - tmp = ((id >> 8) - .5)/255; - - if (tmp > 0) - { - is_lo = ceil(outmax * tmp - vi->maxout_total); - if (is_lo < 0) is_lo = 0; - } - - else - is_lo = 0; - - tmp = ((id >> 8) + .5)/255; - - if (tmp < 1) - { - is_hi = floor(outmax * tmp + vi->maxout_total); - if (is_hi > outmax) is_hi = outmax; - } - - else - is_hi = outmax; - - if (!(od < is_lo || od > is_hi)) - { - if (encoded_error < vi->outlog) - return i; - - pass = "within 8 bit limits:\n"; - } - } -# endif -# endif - } - else /* !use_input_precision */ - is_lo = es_lo, is_hi = es_hi; - - /* Attempt to output a meaningful error/warning message: the message - * output depends on the background/composite operation being performed - * because this changes what parameters were actually used above. - */ - { - size_t pos = 0; - /* Need either 1/255 or 1/65535 precision here; 3 or 6 decimal - * places. Just use outmax to work out which. - */ - int precision = (outmax >= 1000 ? 6 : 3); - int use_input=1, use_background=0, do_compose=0; - char msg[256]; - - if (pass != 0) - pos = safecat(msg, sizeof msg, pos, "\n\t"); - - /* Set up the various flags, the output_is_encoded flag above - * is also used below. do_compose is just a double check. - */ - switch (do_background) - { -# ifdef PNG_READ_BACKGROUND_SUPPORTED - case PNG_BACKGROUND_GAMMA_SCREEN: - case PNG_BACKGROUND_GAMMA_FILE: - case PNG_BACKGROUND_GAMMA_UNIQUE: - use_background = (alpha >= 0 && alpha < 1); -# endif -# ifdef PNG_READ_ALPHA_MODE_SUPPORTED - /* FALLTHROUGH */ - case ALPHA_MODE_OFFSET + PNG_ALPHA_STANDARD: - case ALPHA_MODE_OFFSET + PNG_ALPHA_BROKEN: - case ALPHA_MODE_OFFSET + PNG_ALPHA_OPTIMIZED: -# endif /* ALPHA_MODE_SUPPORTED */ - do_compose = (alpha > 0 && alpha < 1); - use_input = (alpha != 0); - break; - - default: - break; - } - - /* Check the 'compose' flag */ - if (compose != do_compose) - png_error(vi->pp, "internal error (compose)"); - - /* 'name' is the component name */ - pos = safecat(msg, sizeof msg, pos, name); - pos = safecat(msg, sizeof msg, pos, "("); - pos = safecatn(msg, sizeof msg, pos, id); - if (use_input || pass != 0/*logging*/) - { - if (isbit != id) - { - /* sBIT has reduced the precision of the input: */ - pos = safecat(msg, sizeof msg, pos, ", sbit("); - pos = safecatn(msg, sizeof msg, pos, vi->sbit); - pos = safecat(msg, sizeof msg, pos, "): "); - pos = safecatn(msg, sizeof msg, pos, isbit); - } - pos = safecat(msg, sizeof msg, pos, "/"); - /* The output is either "id/max" or "id sbit(sbit): isbit/max" */ - pos = safecatn(msg, sizeof msg, pos, vi->sbit_max); - } - pos = safecat(msg, sizeof msg, pos, ")"); - - /* A component may have been multiplied (in linear space) by the - * alpha value, 'compose' says whether this is relevant. - */ - if (compose || pass != 0) - { - /* If any form of composition is being done report our - * calculated linear value here (the code above doesn't record - * the input value before composition is performed, so what - * gets reported is the value after composition.) - */ - if (use_input || pass != 0) - { - if (vi->file_inverse > 0) - { - pos = safecat(msg, sizeof msg, pos, "^"); - pos = safecatd(msg, sizeof msg, pos, vi->file_inverse, 2); - } - - else - pos = safecat(msg, sizeof msg, pos, "[linear]"); - - pos = safecat(msg, sizeof msg, pos, "*(alpha)"); - pos = safecatd(msg, sizeof msg, pos, alpha, precision); - } - - /* Now record the *linear* background value if it was used - * (this function is not passed the original, non-linear, - * value but it is contained in the test name.) - */ - if (use_background) - { - pos = safecat(msg, sizeof msg, pos, use_input ? "+" : " "); - pos = safecat(msg, sizeof msg, pos, "(background)"); - pos = safecatd(msg, sizeof msg, pos, background, precision); - pos = safecat(msg, sizeof msg, pos, "*"); - pos = safecatd(msg, sizeof msg, pos, 1-alpha, precision); - } - } - - /* Report the calculated value (input_sample) and the linearized - * libpng value (output) unless this is just a component gamma - * correction. - */ - if (compose || alpha < 0 || pass != 0) - { - pos = safecat(msg, sizeof msg, pos, - pass != 0 ? " =\n\t" : " = "); - pos = safecatd(msg, sizeof msg, pos, input_sample, precision); - pos = safecat(msg, sizeof msg, pos, " (libpng: "); - pos = safecatd(msg, sizeof msg, pos, output, precision); - pos = safecat(msg, sizeof msg, pos, ")"); - - /* Finally report the output gamma encoding, if any. */ - if (output_is_encoded) - { - pos = safecat(msg, sizeof msg, pos, " ^"); - pos = safecatd(msg, sizeof msg, pos, vi->screen_inverse, 2); - pos = safecat(msg, sizeof msg, pos, "(to screen) ="); - } - - else - pos = safecat(msg, sizeof msg, pos, " [screen is linear] ="); - } - - if ((!compose && alpha >= 0) || pass != 0) - { - if (pass != 0) /* logging */ - pos = safecat(msg, sizeof msg, pos, "\n\t[overall:"); - - /* This is the non-composition case, the internal linear - * values are irrelevant (though the log below will reveal - * them.) Output a much shorter warning/error message and report - * the overall gamma correction. - */ - if (vi->gamma_correction > 0) - { - pos = safecat(msg, sizeof msg, pos, " ^"); - pos = safecatd(msg, sizeof msg, pos, vi->gamma_correction, 2); - pos = safecat(msg, sizeof msg, pos, "(gamma correction) ="); - } - - else - pos = safecat(msg, sizeof msg, pos, - " [no gamma correction] ="); - - if (pass != 0) - pos = safecat(msg, sizeof msg, pos, "]"); - } - - /* This is our calculated encoded_sample which should (but does - * not) match od: - */ - pos = safecat(msg, sizeof msg, pos, pass != 0 ? "\n\t" : " "); - pos = safecatd(msg, sizeof msg, pos, is_lo, 1); - pos = safecat(msg, sizeof msg, pos, " < "); - pos = safecatd(msg, sizeof msg, pos, encoded_sample, 1); - pos = safecat(msg, sizeof msg, pos, " (libpng: "); - pos = safecatn(msg, sizeof msg, pos, od); - pos = safecat(msg, sizeof msg, pos, ")"); - pos = safecat(msg, sizeof msg, pos, "/"); - pos = safecatn(msg, sizeof msg, pos, outmax); - pos = safecat(msg, sizeof msg, pos, " < "); - pos = safecatd(msg, sizeof msg, pos, is_hi, 1); - - if (pass == 0) /* The error condition */ - { -# ifdef PNG_WARNINGS_SUPPORTED - png_warning(vi->pp, msg); -# else - store_warning(vi->pp, msg); -# endif - } - - else /* logging this value */ - store_verbose(&vi->dp->pm->this, vi->pp, pass, msg); - } - } - } - - return i; -} - -static void -gamma_image_validate(gamma_display *dp, png_const_structp pp, - png_infop pi) -{ - /* Get some constants derived from the input and output file formats: */ - const png_store* const ps = dp->this.ps; - png_byte in_ct = dp->this.colour_type; - png_byte in_bd = dp->this.bit_depth; - png_uint_32 w = dp->this.w; - png_uint_32 h = dp->this.h; - const size_t cbRow = dp->this.cbRow; - png_byte out_ct = png_get_color_type(pp, pi); - png_byte out_bd = png_get_bit_depth(pp, pi); - - /* There are three sources of error, firstly the quantization in the - * file encoding, determined by sbit and/or the file depth, secondly - * the output (screen) gamma and thirdly the output file encoding. - * - * Since this API receives the screen and file gamma in double - * precision it is possible to calculate an exact answer given an input - * pixel value. Therefore we assume that the *input* value is exact - - * sample/maxsample - calculate the corresponding gamma corrected - * output to the limits of double precision arithmetic and compare with - * what libpng returns. - * - * Since the library must quantize the output to 8 or 16 bits there is - * a fundamental limit on the accuracy of the output of +/-.5 - this - * quantization limit is included in addition to the other limits - * specified by the parameters to the API. (Effectively, add .5 - * everywhere.) - * - * The behavior of the 'sbit' parameter is defined by section 12.5 - * (sample depth scaling) of the PNG spec. That section forces the - * decoder to assume that the PNG values have been scaled if sBIT is - * present: - * - * png-sample = floor( input-sample * (max-out/max-in) + .5); - * - * This means that only a subset of the possible PNG values should - * appear in the input. However, the spec allows the encoder to use a - * variety of approximations to the above and doesn't require any - * restriction of the values produced. - * - * Nevertheless the spec requires that the upper 'sBIT' bits of the - * value stored in a PNG file be the original sample bits. - * Consequently the code below simply scales the top sbit bits by - * (1<this.palette; - int in_is_transparent = dp->this.is_transparent; - int process_tRNS; - int out_npalette = -1; - int out_is_transparent = 0; /* Just refers to the palette case */ - store_palette out_palette; - validate_info vi; - - /* Check for row overwrite errors */ - store_image_check(dp->this.ps, pp, 0); - - /* Supply the input and output sample depths here - 8 for an indexed image, - * otherwise the bit depth. - */ - init_validate_info(&vi, dp, pp, in_ct==3?8:in_bd, out_ct==3?8:out_bd); - - processing = (vi.gamma_correction > 0 && !dp->threshold_test) - || in_bd != out_bd || in_ct != out_ct || vi.do_background; - process_tRNS = dp->this.has_tRNS && vi.do_background; - - /* TODO: FIX THIS: MAJOR BUG! If the transformations all happen inside - * the palette there is no way of finding out, because libpng fails to - * update the palette on png_read_update_info. Indeed, libpng doesn't - * even do the required work until much later, when it doesn't have any - * info pointer. Oops. For the moment 'processing' is turned off if - * out_ct is palette. - */ - if (in_ct == 3 && out_ct == 3) - processing = 0; - - if (processing && out_ct == 3) - out_is_transparent = read_palette(out_palette, &out_npalette, pp, pi); - - for (y=0; ythis.palette[in_index].alpha : - sample(std, in_ct, in_bd, x, samples_per_pixel, 0, 0); - - unsigned int output_alpha = 65536 /* as a flag value */; - - if (out_ct == 3) - { - if (out_is_transparent) - output_alpha = out_palette[out_index].alpha; - } - - else if ((out_ct & PNG_COLOR_MASK_ALPHA) != 0) - output_alpha = sample(pRow, out_ct, out_bd, x, - samples_per_pixel, 0, 0); - - if (output_alpha != 65536) - alpha = gamma_component_validate("alpha", &vi, input_alpha, - output_alpha, -1/*alpha*/, 0/*background*/); - - else /* no alpha in output */ - { - /* This is a copy of the calculation of 'i' above in order to - * have the alpha value to use in the background calculation. - */ - alpha = input_alpha >> vi.isbit_shift; - alpha /= vi.sbit_max; - } - } - - else if (process_tRNS) - { - /* alpha needs to be set appropriately for this pixel, it is - * currently 1 and needs to be 0 for an input pixel which matches - * the values in tRNS. - */ - switch (in_ct) - { - case 0: /* gray */ - if (sample(std, in_ct, in_bd, x, 0, 0, 0) == - dp->this.transparent.red) - alpha = 0; - break; - - case 2: /* RGB */ - if (sample(std, in_ct, in_bd, x, 0, 0, 0) == - dp->this.transparent.red && - sample(std, in_ct, in_bd, x, 1, 0, 0) == - dp->this.transparent.green && - sample(std, in_ct, in_bd, x, 2, 0, 0) == - dp->this.transparent.blue) - alpha = 0; - break; - - default: - break; - } - } - - /* Handle grayscale or RGB components. */ - if ((in_ct & PNG_COLOR_MASK_COLOR) == 0) /* grayscale */ - (void)gamma_component_validate("gray", &vi, - sample(std, in_ct, in_bd, x, 0, 0, 0), - sample(pRow, out_ct, out_bd, x, 0, 0, 0), - alpha/*component*/, vi.background_red); - else /* RGB or palette */ - { - (void)gamma_component_validate("red", &vi, - in_ct == 3 ? in_palette[in_index].red : - sample(std, in_ct, in_bd, x, 0, 0, 0), - out_ct == 3 ? out_palette[out_index].red : - sample(pRow, out_ct, out_bd, x, 0, 0, 0), - alpha/*component*/, vi.background_red); - - (void)gamma_component_validate("green", &vi, - in_ct == 3 ? in_palette[in_index].green : - sample(std, in_ct, in_bd, x, 1, 0, 0), - out_ct == 3 ? out_palette[out_index].green : - sample(pRow, out_ct, out_bd, x, 1, 0, 0), - alpha/*component*/, vi.background_green); - - (void)gamma_component_validate("blue", &vi, - in_ct == 3 ? in_palette[in_index].blue : - sample(std, in_ct, in_bd, x, 2, 0, 0), - out_ct == 3 ? out_palette[out_index].blue : - sample(pRow, out_ct, out_bd, x, 2, 0, 0), - alpha/*component*/, vi.background_blue); - } - } - } - - else if (memcmp(std, pRow, cbRow) != 0) - { - char msg[64]; - - /* No transform is expected on the threshold tests. */ - sprintf(msg, "gamma: below threshold row %lu changed", - (unsigned long)y); - - png_error(pp, msg); - } - } /* row (y) loop */ - - dp->this.ps->validated = 1; -} - -static void PNGCBAPI -gamma_end(png_structp ppIn, png_infop pi) -{ - png_const_structp pp = ppIn; - gamma_display *dp = voidcast(gamma_display*, png_get_progressive_ptr(pp)); - - if (!dp->this.speed) - gamma_image_validate(dp, pp, pi); - else - dp->this.ps->validated = 1; -} - -/* A single test run checking a gamma transformation. - * - * maxabs: maximum absolute error as a fraction - * maxout: maximum output error in the output units - * maxpc: maximum percentage error (as a percentage) - */ -static void -gamma_test(png_modifier *pmIn, png_byte colour_typeIn, - png_byte bit_depthIn, int palette_numberIn, - int interlace_typeIn, - const double file_gammaIn, const double screen_gammaIn, - png_byte sbitIn, int threshold_testIn, - const char *name, - int use_input_precisionIn, int scale16In, - int expand16In, int do_backgroundIn, - const png_color_16 *bkgd_colorIn, double bkgd_gammaIn) -{ - gamma_display d; - context(&pmIn->this, fault); - - gamma_display_init(&d, pmIn, FILEID(colour_typeIn, bit_depthIn, - palette_numberIn, interlace_typeIn, 0, 0, 0), - file_gammaIn, screen_gammaIn, sbitIn, - threshold_testIn, use_input_precisionIn, scale16In, - expand16In, do_backgroundIn, bkgd_colorIn, bkgd_gammaIn); - - Try - { - png_structp pp; - png_infop pi; - gama_modification gama_mod; - srgb_modification srgb_mod; - sbit_modification sbit_mod; - - /* For the moment don't use the png_modifier support here. */ - d.pm->encoding_counter = 0; - modifier_set_encoding(d.pm); /* Just resets everything */ - d.pm->current_gamma = d.file_gamma; - - /* Make an appropriate modifier to set the PNG file gamma to the - * given gamma value and the sBIT chunk to the given precision. - */ - d.pm->modifications = NULL; - gama_modification_init(&gama_mod, d.pm, d.file_gamma); - srgb_modification_init(&srgb_mod, d.pm, 127 /*delete*/); - if (d.sbit > 0) - sbit_modification_init(&sbit_mod, d.pm, d.sbit); - - modification_reset(d.pm->modifications); - - /* Get a png_struct for reading the image. */ - pp = set_modifier_for_read(d.pm, &pi, d.this.id, name); - standard_palette_init(&d.this); - - /* Introduce the correct read function. */ - if (d.pm->this.progressive) - { - /* Share the row function with the standard implementation. */ - png_set_progressive_read_fn(pp, &d, gamma_info, progressive_row, - gamma_end); - - /* Now feed data into the reader until we reach the end: */ - modifier_progressive_read(d.pm, pp, pi); - } - else - { - /* modifier_read expects a png_modifier* */ - png_set_read_fn(pp, d.pm, modifier_read); - - /* Check the header values: */ - png_read_info(pp, pi); - - /* Process the 'info' requirements. Only one image is generated */ - gamma_info_imp(&d, pp, pi); - - sequential_row(&d.this, pp, pi, -1, 0); - - if (!d.this.speed) - gamma_image_validate(&d, pp, pi); - else - d.this.ps->validated = 1; - } - - modifier_reset(d.pm); - - if (d.pm->log && !d.threshold_test && !d.this.speed) - fprintf(stderr, "%d bit %s %s: max error %f (%.2g, %2g%%)\n", - d.this.bit_depth, colour_types[d.this.colour_type], name, - d.maxerrout, d.maxerrabs, 100*d.maxerrpc); - - /* Log the summary values too. */ - if (d.this.colour_type == 0 || d.this.colour_type == 4) - { - switch (d.this.bit_depth) - { - case 1: - break; - - case 2: - if (d.maxerrout > d.pm->error_gray_2) - d.pm->error_gray_2 = d.maxerrout; - - break; - - case 4: - if (d.maxerrout > d.pm->error_gray_4) - d.pm->error_gray_4 = d.maxerrout; - - break; - - case 8: - if (d.maxerrout > d.pm->error_gray_8) - d.pm->error_gray_8 = d.maxerrout; - - break; - - case 16: - if (d.maxerrout > d.pm->error_gray_16) - d.pm->error_gray_16 = d.maxerrout; - - break; - - default: - png_error(pp, "bad bit depth (internal: 1)"); - } - } - - else if (d.this.colour_type == 2 || d.this.colour_type == 6) - { - switch (d.this.bit_depth) - { - case 8: - - if (d.maxerrout > d.pm->error_color_8) - d.pm->error_color_8 = d.maxerrout; - - break; - - case 16: - - if (d.maxerrout > d.pm->error_color_16) - d.pm->error_color_16 = d.maxerrout; - - break; - - default: - png_error(pp, "bad bit depth (internal: 2)"); - } - } - - else if (d.this.colour_type == 3) - { - if (d.maxerrout > d.pm->error_indexed) - d.pm->error_indexed = d.maxerrout; - } - } - - Catch(fault) - modifier_reset(voidcast(png_modifier*,(void*)fault)); -} - -static void gamma_threshold_test(png_modifier *pm, png_byte colour_type, - png_byte bit_depth, int interlace_type, double file_gamma, - double screen_gamma) -{ - size_t pos = 0; - char name[64]; - pos = safecat(name, sizeof name, pos, "threshold "); - pos = safecatd(name, sizeof name, pos, file_gamma, 3); - pos = safecat(name, sizeof name, pos, "/"); - pos = safecatd(name, sizeof name, pos, screen_gamma, 3); - - (void)gamma_test(pm, colour_type, bit_depth, 0/*palette*/, interlace_type, - file_gamma, screen_gamma, 0/*sBIT*/, 1/*threshold test*/, name, - 0 /*no input precision*/, - 0 /*no scale16*/, 0 /*no expand16*/, 0 /*no background*/, 0 /*hence*/, - 0 /*no background gamma*/); -} - -static void -perform_gamma_threshold_tests(png_modifier *pm) -{ - png_byte colour_type = 0; - png_byte bit_depth = 0; - unsigned int palette_number = 0; - - /* Don't test more than one instance of each palette - it's pointless, in - * fact this test is somewhat excessive since libpng doesn't make this - * decision based on colour type or bit depth! - * - * CHANGED: now test two palettes and, as a side effect, images with and - * without tRNS. - */ - while (next_format(&colour_type, &bit_depth, &palette_number, - pm->test_lbg_gamma_threshold, pm->test_tRNS)) - if (palette_number < 2) - { - double test_gamma = 1.0; - while (test_gamma >= .4) - { - /* There's little point testing the interlacing vs non-interlacing, - * but this can be set from the command line. - */ - gamma_threshold_test(pm, colour_type, bit_depth, pm->interlace_type, - test_gamma, 1/test_gamma); - test_gamma *= .95; - } - - /* And a special test for sRGB */ - gamma_threshold_test(pm, colour_type, bit_depth, pm->interlace_type, - .45455, 2.2); - - if (fail(pm)) - return; - } -} - -static void gamma_transform_test(png_modifier *pm, - png_byte colour_type, png_byte bit_depth, - int palette_number, - int interlace_type, const double file_gamma, - const double screen_gamma, png_byte sbit, - int use_input_precision, int scale16) -{ - size_t pos = 0; - char name[64]; - - if (sbit != bit_depth && sbit != 0) - { - pos = safecat(name, sizeof name, pos, "sbit("); - pos = safecatn(name, sizeof name, pos, sbit); - pos = safecat(name, sizeof name, pos, ") "); - } - - else - pos = safecat(name, sizeof name, pos, "gamma "); - - if (scale16) - pos = safecat(name, sizeof name, pos, "16to8 "); - - pos = safecatd(name, sizeof name, pos, file_gamma, 3); - pos = safecat(name, sizeof name, pos, "->"); - pos = safecatd(name, sizeof name, pos, screen_gamma, 3); - - gamma_test(pm, colour_type, bit_depth, palette_number, interlace_type, - file_gamma, screen_gamma, sbit, 0, name, use_input_precision, - scale16, pm->test_gamma_expand16, 0 , 0, 0); -} - -static void perform_gamma_transform_tests(png_modifier *pm) -{ - png_byte colour_type = 0; - png_byte bit_depth = 0; - unsigned int palette_number = 0; - - while (next_format(&colour_type, &bit_depth, &palette_number, - pm->test_lbg_gamma_transform, pm->test_tRNS)) - { - unsigned int i, j; - - for (i=0; ingamma_tests; ++i) for (j=0; jngamma_tests; ++j) - if (i != j) - { - gamma_transform_test(pm, colour_type, bit_depth, palette_number, - pm->interlace_type, 1/pm->gammas[i], pm->gammas[j], 0/*sBIT*/, - pm->use_input_precision, 0 /*do not scale16*/); - - if (fail(pm)) - return; - } - } -} - -static void perform_gamma_sbit_tests(png_modifier *pm) -{ - png_byte sbit; - - /* The only interesting cases are colour and grayscale, alpha is ignored here - * for overall speed. Only bit depths where sbit is less than the bit depth - * are tested. - */ - for (sbit=pm->sbitlow; sbit<(1<test_lbg_gamma_sbit, pm->test_tRNS)) - if ((colour_type & PNG_COLOR_MASK_ALPHA) == 0 && - ((colour_type == 3 && sbit < 8) || - (colour_type != 3 && sbit < bit_depth))) - { - unsigned int i; - - for (i=0; ingamma_tests; ++i) - { - unsigned int j; - - for (j=0; jngamma_tests; ++j) if (i != j) - { - gamma_transform_test(pm, colour_type, bit_depth, npalette, - pm->interlace_type, 1/pm->gammas[i], pm->gammas[j], - sbit, pm->use_input_precision_sbit, 0 /*scale16*/); - - if (fail(pm)) - return; - } - } - } - } -} - -/* Note that this requires a 16 bit source image but produces 8 bit output, so - * we only need the 16bit write support, but the 16 bit images are only - * generated if DO_16BIT is defined. - */ -#ifdef DO_16BIT -static void perform_gamma_scale16_tests(png_modifier *pm) -{ -# ifndef PNG_MAX_GAMMA_8 -# define PNG_MAX_GAMMA_8 11 -# endif -# if defined PNG_MAX_GAMMA_8 || PNG_LIBPNG_VER < 10700 -# define SBIT_16_TO_8 PNG_MAX_GAMMA_8 -# else -# define SBIT_16_TO_8 16 -# endif - /* Include the alpha cases here. Note that sbit matches the internal value - * used by the library - otherwise we will get spurious errors from the - * internal sbit style approximation. - * - * The threshold test is here because otherwise the 16 to 8 conversion will - * proceed *without* gamma correction, and the tests above will fail (but not - * by much) - this could be fixed, it only appears with the -g option. - */ - unsigned int i, j; - for (i=0; ingamma_tests; ++i) - { - for (j=0; jngamma_tests; ++j) - { - if (i != j && - fabs(pm->gammas[j]/pm->gammas[i]-1) >= PNG_GAMMA_THRESHOLD) - { - gamma_transform_test(pm, 0, 16, 0, pm->interlace_type, - 1/pm->gammas[i], pm->gammas[j], SBIT_16_TO_8, - pm->use_input_precision_16to8, 1 /*scale16*/); - - if (fail(pm)) - return; - - gamma_transform_test(pm, 2, 16, 0, pm->interlace_type, - 1/pm->gammas[i], pm->gammas[j], SBIT_16_TO_8, - pm->use_input_precision_16to8, 1 /*scale16*/); - - if (fail(pm)) - return; - - gamma_transform_test(pm, 4, 16, 0, pm->interlace_type, - 1/pm->gammas[i], pm->gammas[j], SBIT_16_TO_8, - pm->use_input_precision_16to8, 1 /*scale16*/); - - if (fail(pm)) - return; - - gamma_transform_test(pm, 6, 16, 0, pm->interlace_type, - 1/pm->gammas[i], pm->gammas[j], SBIT_16_TO_8, - pm->use_input_precision_16to8, 1 /*scale16*/); - - if (fail(pm)) - return; - } - } - } -} -#endif /* 16 to 8 bit conversion */ - -#if defined(PNG_READ_BACKGROUND_SUPPORTED) ||\ - defined(PNG_READ_ALPHA_MODE_SUPPORTED) -static void gamma_composition_test(png_modifier *pm, - png_byte colour_type, png_byte bit_depth, - int palette_number, - int interlace_type, const double file_gamma, - const double screen_gamma, - int use_input_precision, int do_background, - int expand_16) -{ - size_t pos = 0; - png_const_charp base; - double bg; - char name[128]; - png_color_16 background; - - /* Make up a name and get an appropriate background gamma value. */ - switch (do_background) - { - default: - base = ""; - bg = 4; /* should not be used */ - break; - case PNG_BACKGROUND_GAMMA_SCREEN: - base = " bckg(Screen):"; - bg = 1/screen_gamma; - break; - case PNG_BACKGROUND_GAMMA_FILE: - base = " bckg(File):"; - bg = file_gamma; - break; - case PNG_BACKGROUND_GAMMA_UNIQUE: - base = " bckg(Unique):"; - /* This tests the handling of a unique value, the math is such that the - * value tends to be <1, but is neither screen nor file (even if they - * match!) - */ - bg = (file_gamma + screen_gamma) / 3; - break; -#ifdef PNG_READ_ALPHA_MODE_SUPPORTED - case ALPHA_MODE_OFFSET + PNG_ALPHA_PNG: - base = " alpha(PNG)"; - bg = 4; /* should not be used */ - break; - case ALPHA_MODE_OFFSET + PNG_ALPHA_STANDARD: - base = " alpha(Porter-Duff)"; - bg = 4; /* should not be used */ - break; - case ALPHA_MODE_OFFSET + PNG_ALPHA_OPTIMIZED: - base = " alpha(Optimized)"; - bg = 4; /* should not be used */ - break; - case ALPHA_MODE_OFFSET + PNG_ALPHA_BROKEN: - base = " alpha(Broken)"; - bg = 4; /* should not be used */ - break; -#endif - } - - /* Use random background values - the background is always presented in the - * output space (8 or 16 bit components). - */ - if (expand_16 || bit_depth == 16) - { - png_uint_32 r = random_32(); - - background.red = (png_uint_16)r; - background.green = (png_uint_16)(r >> 16); - r = random_32(); - background.blue = (png_uint_16)r; - background.gray = (png_uint_16)(r >> 16); - - /* In earlier libpng versions, those where DIGITIZE is set, any background - * gamma correction in the expand16 case was done using 8-bit gamma - * correction tables, resulting in larger errors. To cope with those - * cases use a 16-bit background value which will handle this gamma - * correction. - */ -# if DIGITIZE - if (expand_16 && (do_background == PNG_BACKGROUND_GAMMA_UNIQUE || - do_background == PNG_BACKGROUND_GAMMA_FILE) && - fabs(bg*screen_gamma-1) > PNG_GAMMA_THRESHOLD) - { - /* The background values will be looked up in an 8-bit table to do - * the gamma correction, so only select values which are an exact - * match for the 8-bit table entries: - */ - background.red = (png_uint_16)((background.red >> 8) * 257); - background.green = (png_uint_16)((background.green >> 8) * 257); - background.blue = (png_uint_16)((background.blue >> 8) * 257); - background.gray = (png_uint_16)((background.gray >> 8) * 257); - } -# endif - } - - else /* 8 bit colors */ - { - png_uint_32 r = random_32(); - - background.red = (png_byte)r; - background.green = (png_byte)(r >> 8); - background.blue = (png_byte)(r >> 16); - background.gray = (png_byte)(r >> 24); - } - - background.index = 193; /* rgb(193,193,193) to detect errors */ - - if (!(colour_type & PNG_COLOR_MASK_COLOR)) - { - /* Because, currently, png_set_background is always called with - * 'need_expand' false in this case and because the gamma test itself - * doesn't cause an expand to 8-bit for lower bit depths the colour must - * be reduced to the correct range. - */ - if (bit_depth < 8) - background.gray &= (png_uint_16)((1U << bit_depth)-1); - - /* Grayscale input, we do not convert to RGB (TBD), so we must set the - * background to gray - else libpng seems to fail. - */ - background.red = background.green = background.blue = background.gray; - } - - pos = safecat(name, sizeof name, pos, "gamma "); - pos = safecatd(name, sizeof name, pos, file_gamma, 3); - pos = safecat(name, sizeof name, pos, "->"); - pos = safecatd(name, sizeof name, pos, screen_gamma, 3); - - pos = safecat(name, sizeof name, pos, base); - if (do_background < ALPHA_MODE_OFFSET) - { - /* Include the background color and gamma in the name: */ - pos = safecat(name, sizeof name, pos, "("); - /* This assumes no expand gray->rgb - the current code won't handle that! - */ - if (colour_type & PNG_COLOR_MASK_COLOR) - { - pos = safecatn(name, sizeof name, pos, background.red); - pos = safecat(name, sizeof name, pos, ","); - pos = safecatn(name, sizeof name, pos, background.green); - pos = safecat(name, sizeof name, pos, ","); - pos = safecatn(name, sizeof name, pos, background.blue); - } - else - pos = safecatn(name, sizeof name, pos, background.gray); - pos = safecat(name, sizeof name, pos, ")^"); - pos = safecatd(name, sizeof name, pos, bg, 3); - } - - gamma_test(pm, colour_type, bit_depth, palette_number, interlace_type, - file_gamma, screen_gamma, 0/*sBIT*/, 0, name, use_input_precision, - 0/*strip 16*/, expand_16, do_background, &background, bg); -} - - -static void -perform_gamma_composition_tests(png_modifier *pm, int do_background, - int expand_16) -{ - png_byte colour_type = 0; - png_byte bit_depth = 0; - unsigned int palette_number = 0; - - /* Skip the non-alpha cases - there is no setting of a transparency colour at - * present. - * - * TODO: incorrect; the palette case sets tRNS and, now RGB and gray do, - * however the palette case fails miserably so is commented out below. - */ - while (next_format(&colour_type, &bit_depth, &palette_number, - pm->test_lbg_gamma_composition, pm->test_tRNS)) - if ((colour_type & PNG_COLOR_MASK_ALPHA) != 0 -#if 0 /* TODO: FIXME */ - /*TODO: FIXME: this should work */ - || colour_type == 3 -#endif - || (colour_type != 3 && palette_number != 0)) - { - unsigned int i, j; - - /* Don't skip the i==j case here - it's relevant. */ - for (i=0; ingamma_tests; ++i) for (j=0; jngamma_tests; ++j) - { - gamma_composition_test(pm, colour_type, bit_depth, palette_number, - pm->interlace_type, 1/pm->gammas[i], pm->gammas[j], - pm->use_input_precision, do_background, expand_16); - - if (fail(pm)) - return; - } - } -} -#endif /* READ_BACKGROUND || READ_ALPHA_MODE */ - -static void -init_gamma_errors(png_modifier *pm) -{ - /* Use -1 to catch tests that were not actually run */ - pm->error_gray_2 = pm->error_gray_4 = pm->error_gray_8 = -1.; - pm->error_color_8 = -1.; - pm->error_indexed = -1.; - pm->error_gray_16 = pm->error_color_16 = -1.; -} - -static void -print_one(const char *leader, double err) -{ - if (err != -1.) - printf(" %s %.5f\n", leader, err); -} - -static void -summarize_gamma_errors(png_modifier *pm, png_const_charp who, int low_bit_depth, - int indexed) -{ - fflush(stderr); - - if (who) - printf("\nGamma correction with %s:\n", who); - - else - printf("\nBasic gamma correction:\n"); - - if (low_bit_depth) - { - print_one(" 2 bit gray: ", pm->error_gray_2); - print_one(" 4 bit gray: ", pm->error_gray_4); - print_one(" 8 bit gray: ", pm->error_gray_8); - print_one(" 8 bit color:", pm->error_color_8); - if (indexed) - print_one(" indexed: ", pm->error_indexed); - } - - print_one("16 bit gray: ", pm->error_gray_16); - print_one("16 bit color:", pm->error_color_16); - - fflush(stdout); -} - -static void -perform_gamma_test(png_modifier *pm, int summary) -{ - /*TODO: remove this*/ - /* Save certain values for the temporary overrides below. */ - unsigned int calculations_use_input_precision = - pm->calculations_use_input_precision; -# ifdef PNG_READ_BACKGROUND_SUPPORTED - double maxout8 = pm->maxout8; -# endif - - /* First some arbitrary no-transform tests: */ - if (!pm->this.speed && pm->test_gamma_threshold) - { - perform_gamma_threshold_tests(pm); - - if (fail(pm)) - return; - } - - /* Now some real transforms. */ - if (pm->test_gamma_transform) - { - if (summary) - { - fflush(stderr); - printf("Gamma correction error summary\n\n"); - printf("The printed value is the maximum error in the pixel values\n"); - printf("calculated by the libpng gamma correction code. The error\n"); - printf("is calculated as the difference between the output pixel\n"); - printf("value (always an integer) and the ideal value from the\n"); - printf("libpng specification (typically not an integer).\n\n"); - - printf("Expect this value to be less than .5 for 8 bit formats,\n"); - printf("less than 1 for formats with fewer than 8 bits and a small\n"); - printf("number (typically less than 5) for the 16 bit formats.\n"); - printf("For performance reasons the value for 16 bit formats\n"); - printf("increases when the image file includes an sBIT chunk.\n"); - fflush(stdout); - } - - init_gamma_errors(pm); - /*TODO: remove this. Necessary because the current libpng - * implementation works in 8 bits: - */ - if (pm->test_gamma_expand16) - pm->calculations_use_input_precision = 1; - perform_gamma_transform_tests(pm); - if (!calculations_use_input_precision) - pm->calculations_use_input_precision = 0; - - if (summary) - summarize_gamma_errors(pm, 0/*who*/, 1/*low bit depth*/, 1/*indexed*/); - - if (fail(pm)) - return; - } - - /* The sbit tests produce much larger errors: */ - if (pm->test_gamma_sbit) - { - init_gamma_errors(pm); - perform_gamma_sbit_tests(pm); - - if (summary) - summarize_gamma_errors(pm, "sBIT", pm->sbitlow < 8U, 1/*indexed*/); - - if (fail(pm)) - return; - } - -#ifdef DO_16BIT /* Should be READ_16BIT_SUPPORTED */ - if (pm->test_gamma_scale16) - { - /* The 16 to 8 bit strip operations: */ - init_gamma_errors(pm); - perform_gamma_scale16_tests(pm); - - if (summary) - { - fflush(stderr); - printf("\nGamma correction with 16 to 8 bit reduction:\n"); - printf(" 16 bit gray: %.5f\n", pm->error_gray_16); - printf(" 16 bit color: %.5f\n", pm->error_color_16); - fflush(stdout); - } - - if (fail(pm)) - return; - } -#endif - -#ifdef PNG_READ_BACKGROUND_SUPPORTED - if (pm->test_gamma_background) - { - init_gamma_errors(pm); - - /*TODO: remove this. Necessary because the current libpng - * implementation works in 8 bits: - */ - if (pm->test_gamma_expand16) - { - pm->calculations_use_input_precision = 1; - pm->maxout8 = .499; /* because the 16 bit background is smashed */ - } - perform_gamma_composition_tests(pm, PNG_BACKGROUND_GAMMA_UNIQUE, - pm->test_gamma_expand16); - if (!calculations_use_input_precision) - pm->calculations_use_input_precision = 0; - pm->maxout8 = maxout8; - - if (summary) - summarize_gamma_errors(pm, "background", 1, 0/*indexed*/); - - if (fail(pm)) - return; - } -#endif - -#ifdef PNG_READ_ALPHA_MODE_SUPPORTED - if (pm->test_gamma_alpha_mode) - { - int do_background; - - init_gamma_errors(pm); - - /*TODO: remove this. Necessary because the current libpng - * implementation works in 8 bits: - */ - if (pm->test_gamma_expand16) - pm->calculations_use_input_precision = 1; - for (do_background = ALPHA_MODE_OFFSET + PNG_ALPHA_STANDARD; - do_background <= ALPHA_MODE_OFFSET + PNG_ALPHA_BROKEN && !fail(pm); - ++do_background) - perform_gamma_composition_tests(pm, do_background, - pm->test_gamma_expand16); - if (!calculations_use_input_precision) - pm->calculations_use_input_precision = 0; - - if (summary) - summarize_gamma_errors(pm, "alpha mode", 1, 0/*indexed*/); - - if (fail(pm)) - return; - } -#endif -} -#endif /* PNG_READ_GAMMA_SUPPORTED */ -#endif /* PNG_READ_SUPPORTED */ - -/* INTERLACE MACRO VALIDATION */ -/* This is copied verbatim from the specification, it is simply the pass - * number in which each pixel in each 8x8 tile appears. The array must - * be indexed adam7[y][x] and notice that the pass numbers are based at - * 1, not 0 - the base libpng uses. - */ -static const -png_byte adam7[8][8] = -{ - { 1,6,4,6,2,6,4,6 }, - { 7,7,7,7,7,7,7,7 }, - { 5,6,5,6,5,6,5,6 }, - { 7,7,7,7,7,7,7,7 }, - { 3,6,4,6,3,6,4,6 }, - { 7,7,7,7,7,7,7,7 }, - { 5,6,5,6,5,6,5,6 }, - { 7,7,7,7,7,7,7,7 } -}; - -/* This routine validates all the interlace support macros in png.h for - * a variety of valid PNG widths and heights. It uses a number of similarly - * named internal routines that feed off the above array. - */ -static png_uint_32 -png_pass_start_row(int pass) -{ - int x, y; - ++pass; - for (y=0; y<8; ++y) for (x=0; x<8; ++x) if (adam7[y][x] == pass) - return y; - return 0xf; -} - -static png_uint_32 -png_pass_start_col(int pass) -{ - int x, y; - ++pass; - for (x=0; x<8; ++x) for (y=0; y<8; ++y) if (adam7[y][x] == pass) - return x; - return 0xf; -} - -static int -png_pass_row_shift(int pass) -{ - int x, y, base=(-1), inc=8; - ++pass; - for (y=0; y<8; ++y) for (x=0; x<8; ++x) if (adam7[y][x] == pass) - { - if (base == (-1)) - base = y; - else if (base == y) - {} - else if (inc == y-base) - base=y; - else if (inc == 8) - inc = y-base, base=y; - else if (inc != y-base) - return 0xff; /* error - more than one 'inc' value! */ - } - - if (base == (-1)) return 0xfe; /* error - no row in pass! */ - - /* The shift is always 1, 2 or 3 - no pass has all the rows! */ - switch (inc) - { -case 2: return 1; -case 4: return 2; -case 8: return 3; -default: break; - } - - /* error - unrecognized 'inc' */ - return (inc << 8) + 0xfd; -} - -static int -png_pass_col_shift(int pass) -{ - int x, y, base=(-1), inc=8; - ++pass; - for (x=0; x<8; ++x) for (y=0; y<8; ++y) if (adam7[y][x] == pass) - { - if (base == (-1)) - base = x; - else if (base == x) - {} - else if (inc == x-base) - base=x; - else if (inc == 8) - inc = x-base, base=x; - else if (inc != x-base) - return 0xff; /* error - more than one 'inc' value! */ - } - - if (base == (-1)) return 0xfe; /* error - no row in pass! */ - - /* The shift is always 1, 2 or 3 - no pass has all the rows! */ - switch (inc) - { -case 1: return 0; /* pass 7 has all the columns */ -case 2: return 1; -case 4: return 2; -case 8: return 3; -default: break; - } - - /* error - unrecognized 'inc' */ - return (inc << 8) + 0xfd; -} - -static png_uint_32 -png_row_from_pass_row(png_uint_32 yIn, int pass) -{ - /* By examination of the array: */ - switch (pass) - { -case 0: return yIn * 8; -case 1: return yIn * 8; -case 2: return yIn * 8 + 4; -case 3: return yIn * 4; -case 4: return yIn * 4 + 2; -case 5: return yIn * 2; -case 6: return yIn * 2 + 1; -default: break; - } - - return 0xff; /* bad pass number */ -} - -static png_uint_32 -png_col_from_pass_col(png_uint_32 xIn, int pass) -{ - /* By examination of the array: */ - switch (pass) - { -case 0: return xIn * 8; -case 1: return xIn * 8 + 4; -case 2: return xIn * 4; -case 3: return xIn * 4 + 2; -case 4: return xIn * 2; -case 5: return xIn * 2 + 1; -case 6: return xIn; -default: break; - } - - return 0xff; /* bad pass number */ -} - -static int -png_row_in_interlace_pass(png_uint_32 y, int pass) -{ - /* Is row 'y' in pass 'pass'? */ - int x; - y &= 7; - ++pass; - for (x=0; x<8; ++x) if (adam7[y][x] == pass) - return 1; - - return 0; -} - -static int -png_col_in_interlace_pass(png_uint_32 x, int pass) -{ - /* Is column 'x' in pass 'pass'? */ - int y; - x &= 7; - ++pass; - for (y=0; y<8; ++y) if (adam7[y][x] == pass) - return 1; - - return 0; -} - -static png_uint_32 -png_pass_rows(png_uint_32 height, int pass) -{ - png_uint_32 tiles = height>>3; - png_uint_32 rows = 0; - unsigned int x, y; - - height &= 7; - ++pass; - for (y=0; y<8; ++y) for (x=0; x<8; ++x) if (adam7[y][x] == pass) - { - rows += tiles; - if (y < height) ++rows; - break; /* i.e. break the 'x', column, loop. */ - } - - return rows; -} - -static png_uint_32 -png_pass_cols(png_uint_32 width, int pass) -{ - png_uint_32 tiles = width>>3; - png_uint_32 cols = 0; - unsigned int x, y; - - width &= 7; - ++pass; - for (x=0; x<8; ++x) for (y=0; y<8; ++y) if (adam7[y][x] == pass) - { - cols += tiles; - if (x < width) ++cols; - break; /* i.e. break the 'y', row, loop. */ - } - - return cols; -} - -static void -perform_interlace_macro_validation(void) -{ - /* The macros to validate, first those that depend only on pass: - * - * PNG_PASS_START_ROW(pass) - * PNG_PASS_START_COL(pass) - * PNG_PASS_ROW_SHIFT(pass) - * PNG_PASS_COL_SHIFT(pass) - */ - int pass; - - for (pass=0; pass<7; ++pass) - { - png_uint_32 m, f, v; - - m = PNG_PASS_START_ROW(pass); - f = png_pass_start_row(pass); - if (m != f) - { - fprintf(stderr, "PNG_PASS_START_ROW(%d) = %u != %x\n", pass, m, f); - exit(99); - } - - m = PNG_PASS_START_COL(pass); - f = png_pass_start_col(pass); - if (m != f) - { - fprintf(stderr, "PNG_PASS_START_COL(%d) = %u != %x\n", pass, m, f); - exit(99); - } - - m = PNG_PASS_ROW_SHIFT(pass); - f = png_pass_row_shift(pass); - if (m != f) - { - fprintf(stderr, "PNG_PASS_ROW_SHIFT(%d) = %u != %x\n", pass, m, f); - exit(99); - } - - m = PNG_PASS_COL_SHIFT(pass); - f = png_pass_col_shift(pass); - if (m != f) - { - fprintf(stderr, "PNG_PASS_COL_SHIFT(%d) = %u != %x\n", pass, m, f); - exit(99); - } - - /* Macros that depend on the image or sub-image height too: - * - * PNG_PASS_ROWS(height, pass) - * PNG_PASS_COLS(width, pass) - * PNG_ROW_FROM_PASS_ROW(yIn, pass) - * PNG_COL_FROM_PASS_COL(xIn, pass) - * PNG_ROW_IN_INTERLACE_PASS(y, pass) - * PNG_COL_IN_INTERLACE_PASS(x, pass) - */ - for (v=0;;) - { - /* The first two tests overflow if the pass row or column is outside - * the possible range for a 32-bit result. In fact the values should - * never be outside the range for a 31-bit result, but checking for 32 - * bits here ensures that if an app uses a bogus pass row or column - * (just so long as it fits in a 32 bit integer) it won't get a - * possibly dangerous overflow. - */ - /* First the base 0 stuff: */ - if (v < png_pass_rows(0xFFFFFFFFU, pass)) - { - m = PNG_ROW_FROM_PASS_ROW(v, pass); - f = png_row_from_pass_row(v, pass); - if (m != f) - { - fprintf(stderr, "PNG_ROW_FROM_PASS_ROW(%u, %d) = %u != %x\n", - v, pass, m, f); - exit(99); - } - } - - if (v < png_pass_cols(0xFFFFFFFFU, pass)) - { - m = PNG_COL_FROM_PASS_COL(v, pass); - f = png_col_from_pass_col(v, pass); - if (m != f) - { - fprintf(stderr, "PNG_COL_FROM_PASS_COL(%u, %d) = %u != %x\n", - v, pass, m, f); - exit(99); - } - } - - m = PNG_ROW_IN_INTERLACE_PASS(v, pass); - f = png_row_in_interlace_pass(v, pass); - if (m != f) - { - fprintf(stderr, "PNG_ROW_IN_INTERLACE_PASS(%u, %d) = %u != %x\n", - v, pass, m, f); - exit(99); - } - - m = PNG_COL_IN_INTERLACE_PASS(v, pass); - f = png_col_in_interlace_pass(v, pass); - if (m != f) - { - fprintf(stderr, "PNG_COL_IN_INTERLACE_PASS(%u, %d) = %u != %x\n", - v, pass, m, f); - exit(99); - } - - /* Then the base 1 stuff: */ - ++v; - m = PNG_PASS_ROWS(v, pass); - f = png_pass_rows(v, pass); - if (m != f) - { - fprintf(stderr, "PNG_PASS_ROWS(%u, %d) = %u != %x\n", - v, pass, m, f); - exit(99); - } - - m = PNG_PASS_COLS(v, pass); - f = png_pass_cols(v, pass); - if (m != f) - { - fprintf(stderr, "PNG_PASS_COLS(%u, %d) = %u != %x\n", - v, pass, m, f); - exit(99); - } - - /* Move to the next v - the stepping algorithm starts skipping - * values above 1024. - */ - if (v > 1024) - { - if (v == PNG_UINT_31_MAX) - break; - - v = (v << 1) ^ v; - if (v >= PNG_UINT_31_MAX) - v = PNG_UINT_31_MAX-1; - } - } - } -} - -/* Test color encodings. These values are back-calculated from the published - * chromaticities. The values are accurate to about 14 decimal places; 15 are - * given. These values are much more accurate than the ones given in the spec, - * which typically don't exceed 4 decimal places. This allows testing of the - * libpng code to its theoretical accuracy of 4 decimal places. (If pngvalid - * used the published errors the 'slack' permitted would have to be +/-.5E-4 or - * more.) - * - * The png_modifier code assumes that encodings[0] is sRGB and treats it - * specially: do not change the first entry in this list! - */ -static const color_encoding test_encodings[] = -{ -/* sRGB: must be first in this list! */ -/*gamma:*/ { 1/2.2, -/*red: */ { 0.412390799265959, 0.212639005871510, 0.019330818715592 }, -/*green:*/ { 0.357584339383878, 0.715168678767756, 0.119194779794626 }, -/*blue: */ { 0.180480788401834, 0.072192315360734, 0.950532152249660} }, -/* Kodak ProPhoto (wide gamut) */ -/*gamma:*/ { 1/1.6 /*approximate: uses 1.8 power law compared to sRGB 2.4*/, -/*red: */ { 0.797760489672303, 0.288071128229293, 0.000000000000000 }, -/*green:*/ { 0.135185837175740, 0.711843217810102, 0.000000000000000 }, -/*blue: */ { 0.031349349581525, 0.000085653960605, 0.825104602510460} }, -/* Adobe RGB (1998) */ -/*gamma:*/ { 1/(2+51./256), -/*red: */ { 0.576669042910131, 0.297344975250536, 0.027031361386412 }, -/*green:*/ { 0.185558237906546, 0.627363566255466, 0.070688852535827 }, -/*blue: */ { 0.188228646234995, 0.075291458493998, 0.991337536837639} }, -/* Adobe Wide Gamut RGB */ -/*gamma:*/ { 1/(2+51./256), -/*red: */ { 0.716500716779386, 0.258728243040113, 0.000000000000000 }, -/*green:*/ { 0.101020574397477, 0.724682314948566, 0.051211818965388 }, -/*blue: */ { 0.146774385252705, 0.016589442011321, 0.773892783545073} }, -/* Fake encoding which selects just the green channel */ -/*gamma:*/ { 1.45/2.2, /* the 'Mac' gamma */ -/*red: */ { 0.716500716779386, 0.000000000000000, 0.000000000000000 }, -/*green:*/ { 0.101020574397477, 1.000000000000000, 0.051211818965388 }, -/*blue: */ { 0.146774385252705, 0.000000000000000, 0.773892783545073} }, -}; - -/* signal handler - * - * This attempts to trap signals and escape without crashing. It needs a - * context pointer so that it can throw an exception (call longjmp) to recover - * from the condition; this is handled by making the png_modifier used by 'main' - * into a global variable. - */ -static png_modifier pm; - -static void signal_handler(int signum) -{ - - size_t pos = 0; - char msg[64]; - - pos = safecat(msg, sizeof msg, pos, "caught signal: "); - - switch (signum) - { - case SIGABRT: - pos = safecat(msg, sizeof msg, pos, "abort"); - break; - - case SIGFPE: - pos = safecat(msg, sizeof msg, pos, "floating point exception"); - break; - - case SIGILL: - pos = safecat(msg, sizeof msg, pos, "illegal instruction"); - break; - - case SIGINT: - pos = safecat(msg, sizeof msg, pos, "interrupt"); - break; - - case SIGSEGV: - pos = safecat(msg, sizeof msg, pos, "invalid memory access"); - break; - - case SIGTERM: - pos = safecat(msg, sizeof msg, pos, "termination request"); - break; - - default: - pos = safecat(msg, sizeof msg, pos, "unknown "); - pos = safecatn(msg, sizeof msg, pos, signum); - break; - } - - store_log(&pm.this, NULL/*png_structp*/, msg, 1/*error*/); - - /* And finally throw an exception so we can keep going, unless this is - * SIGTERM in which case stop now. - */ - if (signum != SIGTERM) - { - struct exception_context *the_exception_context = - &pm.this.exception_context; - - Throw &pm.this; - } - - else - exit(1); -} - -/* main program */ -int main(int argc, char **argv) -{ - int summary = 1; /* Print the error summary at the end */ - int memstats = 0; /* Print memory statistics at the end */ - - /* Create the given output file on success: */ - const char *touch = NULL; - - /* This is an array of standard gamma values (believe it or not I've seen - * every one of these mentioned somewhere.) - * - * In the following list the most useful values are first! - */ - static double - gammas[]={2.2, 1.0, 2.2/1.45, 1.8, 1.5, 2.4, 2.5, 2.62, 2.9}; - - /* This records the command and arguments: */ - size_t cp = 0; - char command[1024]; - - anon_context(&pm.this); - - gnu_volatile(summary) - gnu_volatile(memstats) - gnu_volatile(touch) - - /* Add appropriate signal handlers, just the ANSI specified ones: */ - signal(SIGABRT, signal_handler); - signal(SIGFPE, signal_handler); - signal(SIGILL, signal_handler); - signal(SIGINT, signal_handler); - signal(SIGSEGV, signal_handler); - signal(SIGTERM, signal_handler); - -#ifdef HAVE_FEENABLEEXCEPT - /* Only required to enable FP exceptions on platforms where they start off - * disabled; this is not necessary but if it is not done pngvalid will likely - * end up ignoring FP conditions that other platforms fault. - */ - feenableexcept(FE_DIVBYZERO | FE_INVALID | FE_OVERFLOW); -#endif - - modifier_init(&pm); - - /* Preallocate the image buffer, because we know how big it needs to be, - * note that, for testing purposes, it is deliberately mis-aligned by tag - * bytes either side. All rows have an additional five bytes of padding for - * overwrite checking. - */ - store_ensure_image(&pm.this, NULL, 2, TRANSFORM_ROWMAX, TRANSFORM_HEIGHTMAX); - - /* Don't give argv[0], it's normally some horrible libtool string: */ - cp = safecat(command, sizeof command, cp, "pngvalid"); - - /* Default to error on warning: */ - pm.this.treat_warnings_as_errors = 1; - - /* Default assume_16_bit_calculations appropriately; this tells the checking - * code that 16-bit arithmetic is used for 8-bit samples when it would make a - * difference. - */ - pm.assume_16_bit_calculations = PNG_LIBPNG_VER >= 10700; - - /* Currently 16 bit expansion happens at the end of the pipeline, so the - * calculations are done in the input bit depth not the output. - * - * TODO: fix this - */ - pm.calculations_use_input_precision = 1U; - - /* Store the test gammas */ - pm.gammas = gammas; - pm.ngammas = ARRAY_SIZE(gammas); - pm.ngamma_tests = 0; /* default to off */ - - /* Low bit depth gray images don't do well in the gamma tests, until - * this is fixed turn them off for some gamma cases: - */ -# ifdef PNG_WRITE_tRNS_SUPPORTED - pm.test_tRNS = 1; -# endif - pm.test_lbg = PNG_LIBPNG_VER >= 10600; - pm.test_lbg_gamma_threshold = 1; - pm.test_lbg_gamma_transform = PNG_LIBPNG_VER >= 10600; - pm.test_lbg_gamma_sbit = 1; - pm.test_lbg_gamma_composition = PNG_LIBPNG_VER >= 10700; - - /* And the test encodings */ - pm.encodings = test_encodings; - pm.nencodings = ARRAY_SIZE(test_encodings); - -# if PNG_LIBPNG_VER < 10700 - pm.sbitlow = 8U; /* because libpng doesn't do sBIT below 8! */ -# else - pm.sbitlow = 1U; -# endif - - /* The following allows results to pass if they correspond to anything in the - * transformed range [input-.5,input+.5]; this is is required because of the - * way libpng treates the 16_TO_8 flag when building the gamma tables in - * releases up to 1.6.0. - * - * TODO: review this - */ - pm.use_input_precision_16to8 = 1U; - pm.use_input_precision_sbit = 1U; /* because libpng now rounds sBIT */ - - /* Some default values (set the behavior for 'make check' here). - * These values simply control the maximum error permitted in the gamma - * transformations. The practical limits for human perception are described - * below (the setting for maxpc16), however for 8 bit encodings it isn't - * possible to meet the accepted capabilities of human vision - i.e. 8 bit - * images can never be good enough, regardless of encoding. - */ - pm.maxout8 = .1; /* Arithmetic error in *encoded* value */ - pm.maxabs8 = .00005; /* 1/20000 */ - pm.maxcalc8 = 1./255; /* +/-1 in 8 bits for compose errors */ - pm.maxpc8 = .499; /* I.e., .499% fractional error */ - pm.maxout16 = .499; /* Error in *encoded* value */ - pm.maxabs16 = .00005;/* 1/20000 */ - pm.maxcalc16 =1./65535;/* +/-1 in 16 bits for compose errors */ -# if PNG_LIBPNG_VER < 10700 - pm.maxcalcG = 1./((1<38149 by the following: - */ - pm.maxpc16 = .005; /* I.e., 1/200% - 1/20000 */ - - /* Now parse the command line options. */ - while (--argc >= 1) - { - int catmore = 0; /* Set if the argument has an argument. */ - - /* Record each argument for posterity: */ - cp = safecat(command, sizeof command, cp, " "); - cp = safecat(command, sizeof command, cp, *++argv); - - if (strcmp(*argv, "-v") == 0) - pm.this.verbose = 1; - - else if (strcmp(*argv, "-l") == 0) - pm.log = 1; - - else if (strcmp(*argv, "-q") == 0) - summary = pm.this.verbose = pm.log = 0; - - else if (strcmp(*argv, "-w") == 0 || - strcmp(*argv, "--strict") == 0) - pm.this.treat_warnings_as_errors = 1; /* NOTE: this is the default! */ - - else if (strcmp(*argv, "--nostrict") == 0) - pm.this.treat_warnings_as_errors = 0; - - else if (strcmp(*argv, "--speed") == 0) - pm.this.speed = 1, pm.ngamma_tests = pm.ngammas, pm.test_standard = 0, - summary = 0; - - else if (strcmp(*argv, "--memory") == 0) - memstats = 1; - - else if (strcmp(*argv, "--size") == 0) - pm.test_size = 1; - - else if (strcmp(*argv, "--nosize") == 0) - pm.test_size = 0; - - else if (strcmp(*argv, "--standard") == 0) - pm.test_standard = 1; - - else if (strcmp(*argv, "--nostandard") == 0) - pm.test_standard = 0; - - else if (strcmp(*argv, "--transform") == 0) - pm.test_transform = 1; - - else if (strcmp(*argv, "--notransform") == 0) - pm.test_transform = 0; - -#ifdef PNG_READ_TRANSFORMS_SUPPORTED - else if (strncmp(*argv, "--transform-disable=", - sizeof "--transform-disable") == 0) - { - pm.test_transform = 1; - transform_disable(*argv + sizeof "--transform-disable"); - } - - else if (strncmp(*argv, "--transform-enable=", - sizeof "--transform-enable") == 0) - { - pm.test_transform = 1; - transform_enable(*argv + sizeof "--transform-enable"); - } -#endif /* PNG_READ_TRANSFORMS_SUPPORTED */ - - else if (strcmp(*argv, "--gamma") == 0) - { - /* Just do two gamma tests here (2.2 and linear) for speed: */ - pm.ngamma_tests = 2U; - pm.test_gamma_threshold = 1; - pm.test_gamma_transform = 1; - pm.test_gamma_sbit = 1; - pm.test_gamma_scale16 = 1; - pm.test_gamma_background = 1; /* composition */ - pm.test_gamma_alpha_mode = 1; - } - - else if (strcmp(*argv, "--nogamma") == 0) - pm.ngamma_tests = 0; - - else if (strcmp(*argv, "--gamma-threshold") == 0) - pm.ngamma_tests = 2U, pm.test_gamma_threshold = 1; - - else if (strcmp(*argv, "--nogamma-threshold") == 0) - pm.test_gamma_threshold = 0; - - else if (strcmp(*argv, "--gamma-transform") == 0) - pm.ngamma_tests = 2U, pm.test_gamma_transform = 1; - - else if (strcmp(*argv, "--nogamma-transform") == 0) - pm.test_gamma_transform = 0; - - else if (strcmp(*argv, "--gamma-sbit") == 0) - pm.ngamma_tests = 2U, pm.test_gamma_sbit = 1; - - else if (strcmp(*argv, "--nogamma-sbit") == 0) - pm.test_gamma_sbit = 0; - - else if (strcmp(*argv, "--gamma-16-to-8") == 0) - pm.ngamma_tests = 2U, pm.test_gamma_scale16 = 1; - - else if (strcmp(*argv, "--nogamma-16-to-8") == 0) - pm.test_gamma_scale16 = 0; - - else if (strcmp(*argv, "--gamma-background") == 0) - pm.ngamma_tests = 2U, pm.test_gamma_background = 1; - - else if (strcmp(*argv, "--nogamma-background") == 0) - pm.test_gamma_background = 0; - - else if (strcmp(*argv, "--gamma-alpha-mode") == 0) - pm.ngamma_tests = 2U, pm.test_gamma_alpha_mode = 1; - - else if (strcmp(*argv, "--nogamma-alpha-mode") == 0) - pm.test_gamma_alpha_mode = 0; - - else if (strcmp(*argv, "--expand16") == 0) - pm.test_gamma_expand16 = 1; - - else if (strcmp(*argv, "--noexpand16") == 0) - pm.test_gamma_expand16 = 0; - - else if (strcmp(*argv, "--low-depth-gray") == 0) - pm.test_lbg = pm.test_lbg_gamma_threshold = - pm.test_lbg_gamma_transform = pm.test_lbg_gamma_sbit = - pm.test_lbg_gamma_composition = 1; - - else if (strcmp(*argv, "--nolow-depth-gray") == 0) - pm.test_lbg = pm.test_lbg_gamma_threshold = - pm.test_lbg_gamma_transform = pm.test_lbg_gamma_sbit = - pm.test_lbg_gamma_composition = 0; - -# ifdef PNG_WRITE_tRNS_SUPPORTED - else if (strcmp(*argv, "--tRNS") == 0) - pm.test_tRNS = 1; -# endif - - else if (strcmp(*argv, "--notRNS") == 0) - pm.test_tRNS = 0; - - else if (strcmp(*argv, "--more-gammas") == 0) - pm.ngamma_tests = 3U; - - else if (strcmp(*argv, "--all-gammas") == 0) - pm.ngamma_tests = pm.ngammas; - - else if (strcmp(*argv, "--progressive-read") == 0) - pm.this.progressive = 1; - - else if (strcmp(*argv, "--use-update-info") == 0) - ++pm.use_update_info; /* Can call multiple times */ - - else if (strcmp(*argv, "--interlace") == 0) - { -# if CAN_WRITE_INTERLACE - pm.interlace_type = PNG_INTERLACE_ADAM7; -# else /* !CAN_WRITE_INTERLACE */ - fprintf(stderr, "pngvalid: no write interlace support\n"); - return SKIP; -# endif /* !CAN_WRITE_INTERLACE */ - } - - else if (strcmp(*argv, "--use-input-precision") == 0) - pm.use_input_precision = 1U; - - else if (strcmp(*argv, "--use-calculation-precision") == 0) - pm.use_input_precision = 0; - - else if (strcmp(*argv, "--calculations-use-input-precision") == 0) - pm.calculations_use_input_precision = 1U; - - else if (strcmp(*argv, "--assume-16-bit-calculations") == 0) - pm.assume_16_bit_calculations = 1U; - - else if (strcmp(*argv, "--calculations-follow-bit-depth") == 0) - pm.calculations_use_input_precision = - pm.assume_16_bit_calculations = 0; - - else if (strcmp(*argv, "--exhaustive") == 0) - pm.test_exhaustive = 1; - - else if (argc > 1 && strcmp(*argv, "--sbitlow") == 0) - --argc, pm.sbitlow = (png_byte)atoi(*++argv), catmore = 1; - - else if (argc > 1 && strcmp(*argv, "--touch") == 0) - --argc, touch = *++argv, catmore = 1; - - else if (argc > 1 && strncmp(*argv, "--max", 5) == 0) - { - --argc; - - if (strcmp(5+*argv, "abs8") == 0) - pm.maxabs8 = atof(*++argv); - - else if (strcmp(5+*argv, "abs16") == 0) - pm.maxabs16 = atof(*++argv); - - else if (strcmp(5+*argv, "calc8") == 0) - pm.maxcalc8 = atof(*++argv); - - else if (strcmp(5+*argv, "calc16") == 0) - pm.maxcalc16 = atof(*++argv); - - else if (strcmp(5+*argv, "out8") == 0) - pm.maxout8 = atof(*++argv); - - else if (strcmp(5+*argv, "out16") == 0) - pm.maxout16 = atof(*++argv); - - else if (strcmp(5+*argv, "pc8") == 0) - pm.maxpc8 = atof(*++argv); - - else if (strcmp(5+*argv, "pc16") == 0) - pm.maxpc16 = atof(*++argv); - - else - { - fprintf(stderr, "pngvalid: %s: unknown 'max' option\n", *argv); - exit(99); - } - - catmore = 1; - } - - else if (strcmp(*argv, "--log8") == 0) - --argc, pm.log8 = atof(*++argv), catmore = 1; - - else if (strcmp(*argv, "--log16") == 0) - --argc, pm.log16 = atof(*++argv), catmore = 1; - -#ifdef PNG_SET_OPTION_SUPPORTED - else if (strncmp(*argv, "--option=", 9) == 0) - { - /* Syntax of the argument is