use epoxy instead of GLEW on Linux

stevenlovegrove · Feb 24, 2024 · 465713f · 465713f
1 parent 3587d55
commit 465713f
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Showing 6 changed files with 32 additions and 25 deletions.
diff --git a/components/pango_display/src/display.cpp b/components/pango_display/src/display.cpp
@@ -152,7 +152,9 @@ WindowInterface& CreateWindowAndBind(std::string window_title, int w, int h, con
     }
 
     context->MakeCurrent();
+#ifdef HAVE_GLEW
     glewInit();
+#endif
 
     // And finally process pending window events (such as resize) now that we've setup our callbacks.
     context->window->ProcessEvents();

diff --git a/components/pango_opengl/CMakeLists.txt b/components/pango_opengl/CMakeLists.txt
@@ -24,7 +24,7 @@ PRIVATE
 
 find_package(Eigen3 REQUIRED NO_MODULE)
 message(STATUS "Found Eigen: '${EIGEN3_INCLUDE_DIRS}'")
-target_compile_definitions(${COMPONENT} PUBLIC HAVE_EIGEN HAVE_GLEW)
+target_compile_definitions(${COMPONENT} PUBLIC HAVE_EIGEN)
 
 target_link_libraries(${COMPONENT} PUBLIC pango_core pango_image Eigen3::Eigen)
 target_include_directories(${COMPONENT} PUBLIC
@@ -36,29 +36,25 @@ install(DIRECTORY "${CMAKE_CURRENT_LIST_DIR}/include"
 )
 
 if(EMSCRIPTEN)
-    target_compile_definitions(${COMPONENT} PUBLIC HAVE_GLES HAVE_GLES_2)
+    target_compile_definitions(${COMPONENT} PUBLIC HAVE_GLES HAVE_GLES_2 HAVE_GLEW)
     target_sources( ${COMPONENT} PRIVATE ${CMAKE_CURRENT_LIST_DIR}/src/compat/gl2engine.cpp)
 else()
-    if(_LINUX_)
-        set(OpenGL_GL_PREFERENCE "GLVND")
-    endif()
-    find_package(OpenGL REQUIRED QUIET)
-    find_package(GLEW REQUIRED QUIET)
-    target_include_directories( ${COMPONENT} PUBLIC
-        $<BUILD_INTERFACE:${GLEW_INCLUDE_DIR}>
-    )
-    target_link_libraries( ${COMPONENT} PUBLIC
-        ${GLEW_LIBRARY}
-    )
-
     if(_LINUX_)
         # EGL specific
+        set(OpenGL_GL_PREFERENCE "GLVND")
         find_package(OpenGL REQUIRED COMPONENTS OpenGL EGL)
-        target_link_libraries(${COMPONENT} PUBLIC ${GLEW_LIBRARY} OpenGL::EGL)
-        target_include_directories( ${COMPONENT} PUBLIC $<BUILD_INTERFACE:${OPENGL_EGL_INCLUDE_DIRS}>)
+        find_package(epoxy REQUIRED)
+        target_link_libraries(${COMPONENT} PUBLIC epoxy::epoxy OpenGL::EGL)
+        target_include_directories(${COMPONENT} PUBLIC $<BUILD_INTERFACE:${OPENGL_EGL_INCLUDE_DIRS}>)
+        target_compile_definitions(${COMPONENT} PUBLIC HAVE_EPOXY)
     else()
         # OpenGL defaults
-        target_link_libraries(${COMPONENT} PUBLIC ${GLEW_LIBRARY} ${OPENGL_LIBRARIES})
-        target_include_directories( ${COMPONENT} PUBLIC $<BUILD_INTERFACE:${OPENGL_INCLUDE_DIR}>)
+        find_package(OpenGL REQUIRED)
+        find_package(GLEW REQUIRED)
+        target_include_directories(${COMPONENT} PUBLIC $<BUILD_INTERFACE:${GLEW_INCLUDE_DIR}>)
+        target_link_libraries(${COMPONENT} PUBLIC ${GLEW_LIBRARY})
+        target_link_libraries(${COMPONENT} PUBLIC ${OPENGL_LIBRARIES})
+        target_include_directories(${COMPONENT} PUBLIC $<BUILD_INTERFACE:${OPENGL_INCLUDE_DIR}>)
+        target_compile_definitions(${COMPONENT} PUBLIC HAVE_GLEW)
     endif()
 endif()
diff --git a/components/pango_opengl/include/pangolin/gl/glplatform.h b/components/pango_opengl/include/pangolin/gl/glplatform.h
@@ -55,8 +55,10 @@
     #undef ERROR
 #endif
 
-#ifdef HAVE_GLEW
+#if defined(HAVE_GLEW)
     #include <GL/glew.h>
+#elif defined(HAVE_EPOXY)
+    #include <epoxy/gl.h>
 #endif
 
 #ifdef HAVE_GLES

diff --git a/examples/VBODisplay/main.cpp b/examples/VBODisplay/main.cpp
@@ -1,6 +1,10 @@
 #include <iostream>
 
-#include <GL/glew.h>
+#if defined(HAVE_GLEW)
+    #include <GL/glew.h>
+#elif defined(HAVE_EPOXY)
+    #include <epoxy/gl.h>
+#endif
 
 #include <pangolin/pangolin.h>
 #include <pangolin/gl/glcuda.h>
@@ -24,10 +28,12 @@ int main( int /*argc*/, char* argv[] )
 //  cudaGLSetGLDevice(0);
 
   pangolin::CreateWindowAndBind("Main",640,480);
+#ifdef HAVE_GLEW
   glewInit();
-
-  // 3D Mouse handler requires depth testing to be enabled  
-  glEnable(GL_DEPTH_TEST);  
+#endif
+
+  // 3D Mouse handler requires depth testing to be enabled
+  glEnable(GL_DEPTH_TEST);
 
   // Create vertex and colour buffer objects and register them with CUDA
   GlBufferCudaPtr vertex_array(

diff --git a/package.xml b/package.xml
@@ -11,6 +11,7 @@
   <buildtool_depend>cmake</buildtool_depend>
 
   <depend>libglew-dev</depend>
+  <depend>libepoxy-dev</depend>
   <depend>python3-dev</depend>
   <build_depend>eigen</build_depend>
   <depend>libpng-dev</depend>

diff --git a/scripts/install_prerequisites.sh b/scripts/install_prerequisites.sh
@@ -120,7 +120,7 @@ if [[ "$MANAGER" == "apt" ]]; then
     PKGS_OPTIONS+=(install --no-install-suggests --no-install-recommends)
     if ((DRYRUN > 0));  then PKGS_OPTIONS+=(--dry-run); SUDO=""; fi
     PKGS_REQUIRED+=(libgl1-mesa-dev libwayland-dev libxkbcommon-dev wayland-protocols libegl1-mesa-dev)
-    PKGS_REQUIRED+=(libc++-dev libglew-dev libeigen3-dev cmake g++ ninja-build)
+    PKGS_REQUIRED+=(libc++-dev libepoxy-dev libglew-dev libeigen3-dev cmake g++ ninja-build)
     PKGS_RECOMMENDED+=(libjpeg-dev libpng-dev catch2)
     PKGS_RECOMMENDED+=(libavcodec-dev libavutil-dev libavformat-dev libswscale-dev libavdevice-dev)
     PKGS_ALL+=(libdc1394-dev libraw1394-dev libopenni-dev python3-dev python3-distutils)
@@ -129,7 +129,7 @@ elif [[ "$MANAGER" == "dnf" ]]; then
     PKGS_UPDATE="dnf check-update"
     PKGS_OPTIONS+=(install)
     PKGS_REQUIRED+=(wayland-devel libxkbcommon-devel g++ ninja-build)
-    PKGS_REQUIRED+=(glew-devel eigen3 cmake)
+    PKGS_REQUIRED+=(epoxy-devel eigen3 cmake)
     PKGS_RECOMMENDED+=(libjpeg-devel libpng-devel OpenEXR-devel catch2)
     PKGS_ALL+=(libdc1394-devel libraw1394-devel librealsense-devel openni-devel)
     if ((DRYRUN > 0));  then