GL_ARB_shader_texture_image_samples DONE (i965, nv50, nvc0, r600, radeonsi)
GL_ARB_texture_barrier DONE (i965, nv50, nvc0, r600, radeonsi)
GL_KHR_context_flush_control DONE (all - but needs GLX/EGL extension to be useful)
- GL_KHR_robustness DONE (i965)
+ GL_KHR_robustness DONE (i965, nvc0, radeonsi)
GL_EXT_shader_integer_mix DONE (all drivers that support GLSL)
These are the extensions cherry-picked to make GLES 3.1