From a8dee3a614692b7e4f4a897cc32f85a19c965dff Mon Sep 17 00:00:00 2001
From: Jason Wilkins <Jason.A.Wilkins@gmail.com>
Date: Wed, 11 Jun 2014 20:26:22 -0500
Subject: GHOST Refactor for EGL Contexts

Documentation to appear here:
http://wiki.blender.org/index.php/User:Jwilkins/VFX/GHOST_Refactor_for_EGL

Missing from this commit is support for systems other than Windows.
This also only builds with CMake.
---
 build_files/cmake/Modules/FindOpenGLES.cmake | 51 ++++++++++++++++++++++++++++
 build_files/cmake/macros.cmake               | 14 ++++----
 2 files changed, 59 insertions(+), 6 deletions(-)
 create mode 100644 build_files/cmake/Modules/FindOpenGLES.cmake

(limited to 'build_files/cmake')

diff --git a/build_files/cmake/Modules/FindOpenGLES.cmake b/build_files/cmake/Modules/FindOpenGLES.cmake
new file mode 100644
index 00000000000..981a1abb0a9
--- /dev/null
+++ b/build_files/cmake/Modules/FindOpenGLES.cmake
@@ -0,0 +1,51 @@
+# - Try to find OpenGLES
+# Once done this will define
+#
+#  OPENGLES_FOUND           - system has OpenGLES and EGL
+#  OPENGL_EGL_FOUND         - system has EGL
+#  OPENGLES_INCLUDE_DIR     - the GLES include directory
+#  OPENGLES_LIBRARY         - the GLES library
+#  OPENGLES_EGL_INCLUDE_DIR - the EGL include directory
+#  OPENGLES_EGL_LIBRARY     - the EGL library
+#  OPENGLES_LIBRARIES       - all libraries needed for OpenGLES
+#  OPENGLES_INCLUDES        - all includes needed for OpenGLES
+
+FIND_PATH(OPENGLES_INCLUDE_DIR GLES2/gl2.h
+  /usr/openwin/share/include
+  /opt/graphics/OpenGL/include /usr/X11R6/include
+  /usr/include
+)
+
+FIND_LIBRARY(OPENGLES_LIBRARY
+  NAMES GLESv2
+  PATHS /opt/graphics/OpenGL/lib
+        /usr/openwin/lib
+        /usr/shlib /usr/X11R6/lib
+        /usr/lib
+)
+
+FIND_PATH(OPENGLES_EGL_INCLUDE_DIR EGL/egl.h
+  /usr/openwin/share/include
+  /opt/graphics/OpenGL/include /usr/X11R6/include
+  /usr/include
+)
+
+FIND_LIBRARY(OPENGLES_EGL_LIBRARY
+    NAMES EGL
+    PATHS /usr/shlib /usr/X11R6/lib
+          /usr/lib
+)
+
+SET(OPENGL_EGL_FOUND "NO")
+IF(OPENGLES_EGL_LIBRARY AND OPENGLES_EGL_INCLUDE_DIR)
+    SET(OPENGL_EGL_FOUND "YES")
+ENDIF()
+
+SET(OPENGLES_FOUND "NO")
+IF(OPENGLES_LIBRARY AND OPENGLES_INCLUDE_DIR AND
+   OPENGLES_EGL_LIBRARY AND OPENGLES_EGL_INCLUDE_DIR)
+    SET(OPENGLES_LIBRARIES ${OPENGLES_LIBRARY} ${OPENGLES_LIBRARIES}
+                           ${OPENGLES_EGL_LIBRARY})
+    SET(OPENGLES_INCLUDES ${OPENGLES_INCLUDE_DIR} ${OPENGLES_EGL_INCLUDE_DIR})
+    SET(OPENGLES_FOUND "YES")
+ENDIF()
diff --git a/build_files/cmake/macros.cmake b/build_files/cmake/macros.cmake
index 772ff6d7596..80a4858bf94 100644
--- a/build_files/cmake/macros.cmake
+++ b/build_files/cmake/macros.cmake
@@ -284,8 +284,7 @@ macro(setup_liblinks
 	set(CMAKE_EXE_LINKER_FLAGS_DEBUG "${CMAKE_EXE_LINKER_FLAGS_DEBUG} ${PLATFORM_LINKFLAGS_DEBUG}")
 
 	target_link_libraries(${target}
-			${OPENGL_gl_LIBRARY}
-			${OPENGL_glu_LIBRARY}
+			${BLENDER_GL_LIBRARIES}
 			${PNG_LIBRARIES}
 			${ZLIB_LIBRARIES}
 			${FREETYPE_LIBRARY})
@@ -305,7 +304,7 @@ macro(setup_liblinks
 	endif()
 
 	if(WITH_SYSTEM_GLEW)
-		target_link_libraries(${target} ${GLEW_LIBRARY})
+		target_link_libraries(${target} ${BLENDER_GLEW_LIBRARIES})
 	endif()
 	if(WITH_BULLET AND WITH_SYSTEM_BULLET)
 		target_link_libraries(${target} ${BULLET_LIBRARIES})
@@ -359,9 +358,12 @@ macro(setup_liblinks
 	endif()
 	if(WITH_CODEC_FFMPEG)
 
-		# Strange!, without this ffmpeg gives linking errors (on linux)
-		# even though its linked above
-		target_link_libraries(${target} ${OPENGL_glu_LIBRARY})
+		# Strange! Without this ffmpeg gives linking errors (on linux),
+		# even though it's linked above.
+		# XXX: Does FFMPEG depend on GLU?
+		if(WITH_GLU)
+			target_link_libraries(${target} ${OPENGL_glu_LIBRARY})
+		endif()
 
 		target_link_libraries(${target} ${FFMPEG_LIBRARIES})
 	endif()
-- 
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