[Bf-blender-cvs] [c899c7c9e12] blender2.8: Check we've got GLEW version 2 when building with core profile

[Sergey Sharybin]

Commit: c899c7c9e128dae2beba307a376118e9eb5aaf58
Author: Sergey Sharybin
Date:   Mon May 1 10:37:04 2017 +0200
Branches: blender2.8
https://developer.blender.org/rBc899c7c9e128dae2beba307a376118e9eb5aaf58

Check we've got GLEW version 2 when building with core profile

There was a bug in older GLEW version which kept glGenVertexArrays as NULL
when 3.2 core context is requested [1].

Didn't find a way to check GLEW version from CMake, it seems the version
is not really exposed to the header.

[1] https://sourceforge.net/p/glew/bugs/124/

===================================================================

M	intern/ghost/intern/GHOST_WindowX11.cpp

===================================================================

diff --git a/intern/ghost/intern/GHOST_WindowX11.cpp b/intern/ghost/intern/GHOST_WindowX11.cpp
index 7dc3f917fde..11f3a6ea406 100644
--- a/intern/ghost/intern/GHOST_WindowX11.cpp
+++ b/intern/ghost/intern/GHOST_WindowX11.cpp
@@ -1329,6 +1329,16 @@ GHOST_Context *GHOST_WindowX11::newDrawingContext(GHOST_TDrawingContextType type
 		//   try 3.3 core profile
 		//   no fallbacks
 
+#if defined(WITH_GL_PROFILE_CORE)
+		{
+			const char *version_major = (char*)glewGetString(GLEW_VERSION_MAJOR);
+			if (version_major != NULL && version_major[0] == '1') {
+				fprintf(stderr, "Error: GLEW version 2.0 and above is required.\n");
+				abort();
+			}
+		}
+#endif
+
 		const int profile_mask =
 #if defined(WITH_GL_PROFILE_CORE)
 			GLX_CONTEXT_CORE_PROFILE_BIT_ARB;