
This is the status of GL extension support in the virglrenderer code base.

The initial codebase has GL3.3 feature complete.

Some features don't require renderer support and are handled in the
guest driver completely.

Feature                                               Status
----------------------------------------------------- ------------------------
GL 3.3, GLSL 3.30 --- renderer complete support.

GL 4.0, GLSL 4.00 ---

  GL_ARB_draw_buffers_blend                            DONE
  GL_ARB_draw_indirect                                 DONE
  GL_ARB_gpu_shader5                                   DONE
  - 'precise' qualifier                                GUEST
  - Dynamically uniform sampler array indices          
  - Dynamically uniform UBO array indices              
  - Implicit signed -> unsigned conversions            GUEST
  - Fused multiply-add                                 
  - Packing/bitfield/conversion functions              
  - Enhanced textureGather                             
  - Geometry shader instancing                         
  - Geometry shader multiple streams                   
  - Enhanced per-sample shading                        
  - Interpolation functions                            
  - New overload resolution rules                      GUEST
  GL_ARB_gpu_shader_fp64                               DONE
  GL_ARB_sample_shading                                DONE
  GL_ARB_shader_subroutine                             GUEST
  GL_ARB_tessellation_shader                           DONE
  GL_ARB_texture_buffer_object_rgb32                   DONE
  GL_ARB_texture_cube_map_array                        DONE
  GL_ARB_texture_gather                                DONE
  GL_ARB_texture_query_lod                             DONE
  GL_ARB_transform_feedback2                           DONE
  GL_ARB_transform_feedback3                           DONE


GL 4.1, GLSL 4.10 ---

  GL_ARB_ES2_compatibility                             GUEST
  GL_ARB_get_program_binary                            GUEST
  GL_ARB_separate_shader_objects                       GUEST
  GL_ARB_shader_precision                              GUEST
  GL_ARB_vertex_attrib_64bit                           DONE
  GL_ARB_viewport_array                                DONE


GL 4.2, GLSL 4.20:

  GL_ARB_texture_compression_bptc                      DONE
  GL_ARB_compressed_texture_pixel_storage              DONE
  GL_ARB_shader_atomic_counters                        DONE
  GL_ARB_texture_storage                               DONE
  GL_ARB_transform_feedback_instanced                  DONE
  GL_ARB_base_instance                                 DONE
  GL_ARB_shader_image_load_store                       DONE
  GL_ARB_conservative_depth                            DONE
  GL_ARB_shading_language_420pack                      DONE
  GL_ARB_shading_language_packing                      DONE
  GL_ARB_internalformat_query                          DONE
  GL_ARB_map_buffer_alignment                          DONE


GL 4.3, GLSL 4.30:

  GL_ARB_arrays_of_arrays                              DONE
  GL_ARB_ES3_compatibility                             DONE
  GL_ARB_clear_buffer_object                           DONE
  GL_ARB_compute_shader                                DONE
  GL_ARB_copy_image                                    DONE
  GL_KHR_debug                                         DONE
  GL_ARB_explicit_uniform_location                     DONE
  GL_ARB_fragment_layer_viewport                       DONE
  GL_ARB_framebuffer_no_attachments                    DONE
  GL_ARB_internalformat_query2                         DONE
  GL_ARB_invalidate_subdata                            DONE
  GL_ARB_multi_draw_indirect                           DONE
  GL_ARB_program_interface_query                       DONE
  GL_ARB_robust_buffer_access_behavior                 DONE
  GL_ARB_shader_image_size                             DONE
  GL_ARB_shader_storage_buffer_object                  DONE
  GL_ARB_stencil_texturing                             DONE
  GL_ARB_texture_buffer_range                          DONE
  GL_ARB_texture_query_levels                          DONE
  GL_ARB_texture_storage_multisample                   DONE
  GL_ARB_texture_view                                  DONE
  GL_ARB_vertex_attrib_binding                         GUEST


GL 4.4, GLSL 4.40:

  GL_MAX_VERTEX_ATTRIB_STRIDE                          
  GL_ARB_buffer_storage                                
  GL_ARB_clear_texture                                 
  GL_ARB_enhanced_layouts                              DONE
  GL_ARB_multi_bind                                    DONE
  GL_ARB_query_buffer_object                           
  GL_ARB_texture_mirror_clamp_to_edge                  DONE
  GL_ARB_texture_stencil8                              DONE
  GL_ARB_vertex_type_10f_11f_11f_rev                   DONE

GL 4.5, GLSL 4.50:

  GL_ARB_ES3_1_compatibility                           DONE
  GL_ARB_clip_control                                  DONE
  GL_ARB_conditional_render_inverted                   DONE
  GL_ARB_cull_distance                                 DONE
  GL_ARB_derivative_control                            DONE
  GL_ARB_direct_state_access                           GUEST
  GL_ARB_get_texture_sub_image                         DONE
  GL_ARB_shader_texture_image_samples                  DONE
  GL_ARB_texture_barrier                               DONE
  GL_KHR_context_flush_control                         DONE
  GL_KHR_robust_buffer_access_behavior                 DONE
  GL_KHR_robustness                                    DONE
  GL_EXT_shader_integer_mix                            DONE