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Adds comment about xorg-x11's glXGetProcAddress not returning NULL for unsupported functions, closes #171

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This was SVN commit r13480.
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historic_bruno 2013-06-14 23:49:20 +00:00
parent c01c8fb2fc
commit e75877b52f
1 changed files with 4 additions and 1 deletions
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source/lib/ogl.cpp
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@ -1,4 +1,4 @@
/* Copyright (c) 2012 Wildfire Games
/* Copyright (c) 2013 Wildfire Games
*
* Permission is hereby granted, free of charge, to any person obtaining
* a copy of this software and associated documentation files (the
@ -349,6 +349,9 @@ static void importExtensionFunctions()
// checking for the extension.
// (TODO: this calls ogl_HaveVersion far more times than is necessary -
// we should probably use the have_* variables instead)
// Note: the xorg-x11 implementation of glXGetProcAddress doesn't return NULL
// if the function is unsupported (i.e. the rare case of a driver not reporting
// its supported version correctly, see http://trac.wildfiregames.com/ticket/171)
#define FUNC(ret, name, params) p##name = (ret (GL_CALL_CONV*) params)SDL_GL_GetProcAddress(#name);
#define FUNC23(pname, ret, nameARB, nameCore, version, params) \
pname = NULL; \