+ GLuint major, minor, version;
+
+ const bool ver_1_3 = (extensions->ARB_texture_border_clamp &&
+ extensions->ARB_texture_cube_map &&
+ extensions->ARB_texture_env_combine &&
+ extensions->ARB_texture_env_dot3);
+ const bool ver_1_4 = (ver_1_3 &&
+ extensions->ARB_depth_texture &&
+ extensions->ARB_shadow &&
+ extensions->ARB_texture_env_crossbar &&
+ extensions->EXT_blend_color &&
+ extensions->EXT_blend_func_separate &&
+ extensions->EXT_blend_minmax &&
+ extensions->EXT_point_parameters);
+ const bool ver_1_5 = (ver_1_4 &&
+ extensions->ARB_occlusion_query);
+ const bool ver_2_0 = (ver_1_5 &&
+ extensions->ARB_point_sprite &&
+ extensions->ARB_vertex_shader &&
+ extensions->ARB_fragment_shader &&
+ extensions->ARB_texture_non_power_of_two &&
+ extensions->EXT_blend_equation_separate &&
+
+ /* Technically, 2.0 requires the functionality of the
+ * EXT version. Enable 2.0 if either extension is
+ * available, and assume that a driver that only
+ * exposes the ATI extension will fallback to
+ * software when necessary.
+ */
+ (extensions->EXT_stencil_two_side
+ || extensions->ATI_separate_stencil));
+ const bool ver_2_1 = (ver_2_0 &&
+ extensions->EXT_pixel_buffer_object &&
+ extensions->EXT_texture_sRGB);
+ const bool ver_3_0 = (ver_2_1 &&
+ consts->GLSLVersion >= 130 &&
+ (consts->MaxSamples >= 4 || consts->FakeSWMSAA) &&
+ (api == API_OPENGL_CORE ||
+ extensions->ARB_color_buffer_float) &&
+ extensions->ARB_depth_buffer_float &&
+ extensions->ARB_half_float_vertex &&
+ extensions->ARB_map_buffer_range &&
+ extensions->ARB_shader_texture_lod &&
+ extensions->ARB_texture_float &&
+ extensions->ARB_texture_rg &&
+ extensions->ARB_texture_compression_rgtc &&
+ extensions->EXT_draw_buffers2 &&
+ extensions->ARB_framebuffer_object &&
+ extensions->EXT_framebuffer_sRGB &&
+ extensions->EXT_packed_float &&
+ extensions->EXT_texture_array &&
+ extensions->EXT_texture_shared_exponent &&
+ extensions->EXT_transform_feedback &&
+ extensions->NV_conditional_render);
+ const bool ver_3_1 = (ver_3_0 &&
+ consts->GLSLVersion >= 140 &&
+ extensions->ARB_draw_instanced &&
+ extensions->ARB_texture_buffer_object &&
+ extensions->ARB_uniform_buffer_object &&
+ extensions->EXT_texture_snorm &&
+ extensions->NV_primitive_restart &&
+ extensions->NV_texture_rectangle &&
+ consts->Program[MESA_SHADER_VERTEX].MaxTextureImageUnits >= 16);
+ const bool ver_3_2 = (ver_3_1 &&
+ consts->GLSLVersion >= 150 &&
+ extensions->ARB_depth_clamp &&
+ extensions->ARB_draw_elements_base_vertex &&
+ extensions->ARB_fragment_coord_conventions &&
+ extensions->EXT_provoking_vertex &&
+ extensions->ARB_seamless_cube_map &&
+ extensions->ARB_sync &&
+ extensions->ARB_texture_multisample &&
+ extensions->EXT_vertex_array_bgra);
+ const bool ver_3_3 = (ver_3_2 &&
+ consts->GLSLVersion >= 330 &&
+ extensions->ARB_blend_func_extended &&
+ extensions->ARB_explicit_attrib_location &&
+ extensions->ARB_instanced_arrays &&
+ extensions->ARB_occlusion_query2 &&
+ extensions->ARB_shader_bit_encoding &&
+ extensions->ARB_texture_rgb10_a2ui &&
+ extensions->ARB_timer_query &&
+ extensions->ARB_vertex_type_2_10_10_10_rev &&
+ extensions->EXT_texture_swizzle);
+ /* ARB_sampler_objects is always enabled in mesa */
+
+ const bool ver_4_0 = (ver_3_3 &&
+ consts->GLSLVersion >= 400 &&
+ extensions->ARB_draw_buffers_blend &&
+ extensions->ARB_draw_indirect &&
+ extensions->ARB_gpu_shader5 &&
+ extensions->ARB_gpu_shader_fp64 &&
+ extensions->ARB_sample_shading &&
+ extensions->ARB_tessellation_shader &&
+ extensions->ARB_texture_buffer_object_rgb32 &&
+ extensions->ARB_texture_cube_map_array &&
+ extensions->ARB_texture_query_lod &&
+ extensions->ARB_transform_feedback2 &&
+ extensions->ARB_transform_feedback3);
+ const bool ver_4_1 = (ver_4_0 &&
+ consts->GLSLVersion >= 410 &&
+ extensions->ARB_ES2_compatibility &&
+ extensions->ARB_shader_precision &&
+ extensions->ARB_vertex_attrib_64bit &&
+ extensions->ARB_viewport_array);
+ const bool ver_4_2 = (ver_4_1 &&
+ consts->GLSLVersion >= 420 &&
+ extensions->ARB_base_instance &&
+ extensions->ARB_conservative_depth &&
+ extensions->ARB_internalformat_query &&
+ extensions->ARB_shader_atomic_counters &&
+ extensions->ARB_shader_image_load_store &&
+ extensions->ARB_shading_language_420pack &&
+ extensions->ARB_shading_language_packing &&
+ extensions->ARB_texture_compression_bptc &&
+ extensions->ARB_transform_feedback_instanced);
+ const bool ver_4_3 = (ver_4_2 &&
+ consts->GLSLVersion >= 430 &&
+ extensions->ARB_ES3_compatibility &&
+ extensions->ARB_arrays_of_arrays &&
+ extensions->ARB_compute_shader &&
+ extensions->ARB_copy_image &&
+ extensions->ARB_explicit_uniform_location &&
+ extensions->ARB_fragment_layer_viewport &&
+ extensions->ARB_framebuffer_no_attachments &&
+ extensions->ARB_internalformat_query2 &&
+ extensions->ARB_robust_buffer_access_behavior &&
+ extensions->ARB_shader_image_size &&
+ extensions->ARB_shader_storage_buffer_object &&
+ extensions->ARB_stencil_texturing &&
+ extensions->ARB_texture_buffer_range &&
+ extensions->ARB_texture_query_levels &&
+ extensions->ARB_texture_view);
+ const bool ver_4_4 = (ver_4_3 &&
+ consts->GLSLVersion >= 440 &&
+ extensions->ARB_buffer_storage &&
+ extensions->ARB_clear_texture &&
+ extensions->ARB_enhanced_layouts &&
+ extensions->ARB_query_buffer_object &&
+ extensions->ARB_texture_mirror_clamp_to_edge &&
+ extensions->ARB_texture_stencil8 &&
+ extensions->ARB_vertex_type_10f_11f_11f_rev);
+ const bool ver_4_5 = (ver_4_4 &&
+ consts->GLSLVersion >= 450 &&
+ extensions->ARB_ES3_1_compatibility &&
+ extensions->ARB_clip_control &&
+ extensions->ARB_conditional_render_inverted &&
+ extensions->ARB_cull_distance &&
+ extensions->ARB_derivative_control &&
+ extensions->ARB_shader_texture_image_samples &&
+ extensions->NV_texture_barrier);