Fix test suite.

.github/workflows/build.yml

@@ -64,7 +64,7 @@ jobs:
         # Skip tests triggering to-be-investigated fatal error on Windows :(
         (
           if [[ "$(python -c 'import sys; print(sys.platform)')" != win32 ]]; then
-            ./run-mpl-test-suite.py --tolerance=50 --instafail --timeout=300 --capture=no --verbose
+            ./run-mpl-test-suite.py --tolerance=55 --instafail --timeout=300 --capture=no --verbose
           fi
         ) &&
         PYTHONFAULTHANDLER=1 PYTHONIOENCODING=utf-8 ./run-examples.py

ISSUES.rst

@@ -3,6 +3,14 @@ There is a significant performance regression on the wire3d_animation example.
 Fix needed
 ==========
 
+test_backend_ps
+   test_savefig_to_stringio[ps with distiller=xpdf-landscape-letter]
+      xpdf output differences?
+
+test_ft2font
+   test_fallback_missing
+      Font fallback is not implemented.
+
 test_image
    test_figimage[pdf], test_figimage0[pdf], test_figimage1[pdf], test_interp_nearest_vs_none[pdf,svg], test_rasterize_dpi[pdf,svg]
       Invalid dpi manipulations in vector output.

run-mpl-test-suite.py

@@ -122,6 +122,9 @@ def pytest_collection_modifyitems(session, config, items):
         "matplotlib/tests/" + nodeid: marker
         for marker, nodeids in [
             (knownfail, [
+                # Unclear why xpdf doesn't output DocumentMedia: Letter ... for us.
+                "test_backend_ps.py::test_savefig_to_stringio[ps with distiller=xpdf-landscape-letter]",
+                "test_ft2font.py::test_fallback_missing[",
                 "test_image.py::test_jpeg_alpha",
                 "test_image.py::test_figimage[pdf-False]",
                 "test_image.py::test_figimage[pdf-True]",
@@ -171,6 +174,11 @@ def pytest_collection_modifyitems(session, config, items):
                 "test_backend_ps.py::test_savefig_to_stringio[eps-portrait]",
                 "test_backend_ps.py::test_savefig_to_stringio[eps afm-landscape]",
                 "test_backend_ps.py::test_savefig_to_stringio[eps afm-portrait]",
+                # We don't need to distill (unless requested) for PS+usetex.
+                "test_backend_ps.py::test_savefig_to_stringio[ps with usetex-landscape-figure]",
+                "test_backend_ps.py::test_savefig_to_stringio[ps with usetex-landscape-letter]",
+                "test_backend_ps.py::test_savefig_to_stringio[ps with usetex-portrait-figure]",
+                "test_backend_ps.py::test_savefig_to_stringio[ps with usetex-portrait-letter]",
                 # cairo doesn't support SOURCE_DATE_EPOCH.
                 "test_backend_ps.py::test_source_date_epoch",
                 # Useful, but the tag structure is too different (e.g. cairo
@@ -194,6 +202,8 @@ def pytest_collection_modifyitems(session, config, items):
                 # Different tight bbox.
                 "test_bbox_tight.py::test_bbox_inches_tight_suptile_legend[",
                 "test_bbox_tight.py::test_bbox_inches_tight_suptitle_non_default[",
+                # Labels placed differently due to different label size.
+                "test_contour.py::test_label_contour_start",
                 # We already raise on invalid savefig kwargs.
                 "test_figure.py::test_savefig_warns",
                 # cairo uses a different representation for ps images (but

src/mplcairo/base.py

@@ -321,6 +321,9 @@ def _print_ps_impl(self, is_eps, path_or_stream, *,
                        **kwargs):
         if papertype is None:
             papertype = mpl.rcParams["ps.papersize"]
+        if papertype == "auto" and not hasattr(backend_ps, "_get_papertype"):
+            with mpl.rc_context({"ps.papersize": "auto"}):
+                pass  # Trigger ValueError in mpl>=3.10.
         if orientation == "portrait":
             if papertype == "auto":
                 width, height = self.figure.get_size_inches()
@@ -337,12 +340,13 @@ def _print_ps_impl(self, is_eps, path_or_stream, *,
         if "Title" in metadata:
             dsc_comments.append("%%Title: {}".format(metadata.pop("Title")))
         fig_wh = self.figure.get_size_inches() * np.array(72)
+        if orientation == "landscape":
+            fig_wh = fig_wh[::-1]
         if not is_eps and papertype != "figure":
             dsc_comments.append(f"%%DocumentPaperSizes: {papertype}")
             paper_wh = backend_ps.papersize[papertype] * np.array(72)
             if orientation == "landscape":
                 paper_wh = paper_wh[::-1]
-                fig_wh = fig_wh[::-1]
             offset = (paper_wh - fig_wh) / 2 * [1, -1]
             # FIXME: We should set the init transform, including the rotation
             # for landscape orientation, instead of just the offset.
@@ -361,7 +365,7 @@ def _print_ps_impl(self, is_eps, path_or_stream, *,
                  "xpdf": backend_ps.xpdf_distill}[
                      mpl.rcParams["ps.usedistiller"]](
                          str(tmp_name), is_eps, ptype=papertype,
-                        # Assume we can get away with just bbox width/height.
+                         # Assume we can get away with just bbox width/height.
                          bbox=(None, None, *fig_wh))
                 # If path_or_stream is *already* a text-mode stream then
                 # tmp_name needs to be opened in text-mode too.