GL_KHR_debug DONE (all drivers)
GL_KHR_robustness not started (90% done with the ARB variant)
GL_KHR_texture_compression_astc_ldr DONE (i965/gen9+)
- GL_OES_copy_image not started (based on GL_ARB_copy_image, which is done for some drivers)
- GL_OES_draw_buffers_indexed not started
+ GL_OES_copy_image DONE (core only)
+ GL_OES_draw_buffers_indexed DONE (all drivers that support GL_ARB_draw_buffers_blend)
GL_OES_draw_elements_base_vertex DONE (all drivers)
GL_OES_geometry_shader started (Marta)
GL_OES_gpu_shader5 DONE (all drivers that support GL_ARB_gpu_shader5)