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OpenGL: make platform requirements explicit 

At context startup, make sure our assumptions about the OpenGL version are true. Should match since we set up the contexts... but this is what asserts are for, to check "should"s!

Part of T49012
This commit is contained in:
Mike Erwin 2016-09-30 19:10:30 -04:00
parent 42ed1f0e3c
commit 82648a8f91
1 changed files with 15 additions and 4 deletions
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19
source/blender/gpu/intern/gpu_extensions.c
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@ -128,10 +128,21 @@ void GPU_get_dfdy_factors(float fac[2])
void gpu_extensions_init(void)
{
BLI_assert(GLEW_VERSION_3_0 || /* Mesa mininum requirement */
(GLEW_VERSION_2_1 && GLEW_EXT_gpu_shader4 /* Mac minimum requirement */
&& GLEW_ARB_framebuffer_object
&& GLEW_APPLE_flush_buffer_range));
/* during 2.8 development each platform has its own OpenGL minimum requirements
* final 2.8 release will be unified on OpenGL 3.2 core profile, no required extensions
* see developer.blender.org/T49012 for details
*/
#ifdef _WIN32
BLI_assert(GLEW_VERSION_3_2);
#elif defined(__APPLE__)
BLI_assert(GLEW_VERSION_2_1 && GLEW_EXT_gpu_shader4
&& GLEW_ARB_framebuffer_object
&& GLEW_ARB_draw_elements_base_vertex
&& GLEW_APPLE_flush_buffer_range);
#else
BLI_assert(GLEW_VERSION_3_2 || (GLEW_VERSION_3_0 && ARB_draw_elements_base_vertex));
/* vendor driver || Mesa compatibility profile */
#endif
glGetIntegerv(GL_MAX_TEXTURE_IMAGE_UNITS, &GG.maxtextures);