GL_ARB_compute_variable_group_size on Iris. GL_EXT_shader_group_vote on GLES3. VK_AMD_texture_gather_bias_lod on RADV. VK_EXT_private_data on ANV and RADV. VK_EXT_custom_border_color on RADV. VK_EXT_pipeline_creation_cache_control on RADV. VK_EXT_shader_demote_to_helper_invocation on RADV/LLVM. VK_EXT_subgroup_size_control on RADV/ACO. VK_GOOGLE_user_type on ANV and RADV. VK_KHR_shader_subgroup_extended_types on RADV/ACO.