GL_ARB_get_texture_sub_image DONE (all drivers)
GL_ARB_shader_texture_image_samples not started
GL_ARB_texture_barrier DONE (nv50, nvc0, r600, radeonsi)
- GL_KHR_context_flush_control DONE (all - but needs GLX/EXT extension to be useful)
+ GL_KHR_context_flush_control DONE (all - but needs GLX/EGL extension to be useful)
GL_KHR_robust_buffer_access_behavior not started
GL_KHR_robustness 90% done (the ARB variant)
GL_EXT_shader_integer_mix DONE (all drivers that support GLSL)