docs/relnotes/new_features.txt

   1 GL_ARB_compute_variable_group_size on i965.
   2 GL_EXT_depth_bounds_test on Iris.
   3 GL_EXT_texture_shadow_lod on radeonsi, nvc0.
   4 GL_NV_alpha_to_coverage_dither_control on radeonsi
   5 GL_NV_copy_image on all gallium drivers.
   6 GL_NV_pixel_buffer_object on all gallium drivers, i915, i965, swrast.
   7 GL_NV_viewport_array2 on nvc0 (GM200+).
   8 GL_NV_viewport_swizzle on nvc0 (GM200+).
   9 VK_KHR_shader_non_semantic_info on Intel, RADV.
  10 GL_EXT_draw_instanced on gles2
  11 VK_KHR_8bit_storage for ACO on GFX8+
  12 VK_KHR_16bit_storage for ACO on GFX8+ (storageInputOutput16 is still unsupported)
  13 shaderInt16 for ACO on GFX9+
  14 VK_KHR_shader_float16_int8 for ACO on GFX8+ (shaderFloat16 is still unsupported)