OpenGL » Support state

List of (un)supported OpenGL features and extensions.

OpenGL implementation state

The extension implementation is considered complete if all its defined types, functions and enum values are exposed through the API, except for features listed below in Unsupported features.

All extensions from the below lists are available in the GL::Extensions namespace and it's possible to check for their availability using GL::Context::isExtensionSupported(). See its documentation for more information.

OpenGL 2.1

The core subset of OpenGL 2.1 should be fully implemented, except for the following:

Proxy textures
Some forgotten limit queries

OpenGL 3.0

Extension	Status
GLSL 1.30	done
glClearBuffer() functions	done
ARB_map_buffer_range	done
ARB_color_buffer_float
ARB_half_float_pixel	done
ARB_texture_float	done
ARB_depth_buffer_float	done
ARB_texture_rg	done
ARB_vertex_array_object	done
ARB_framebuffer_object	done
ARB_framebuffer_sRGB	done
ARB_half_float_vertex	done
EXT_gpu_shader4	done
EXT_packed_float	done
EXT_texture_array	done
EXT_texture_compression_rgtc	done
EXT_texture_shared_exponent	done
EXT_draw_buffers2	done (GL 3.0 subset)
EXT_texture_integer	done (GL 3.0 subset)
EXT_transform_feedback	done
`MAGNUM_shader_vertex_id` Pseudo-extension denoting support for the `gl_VertexID` GLSL builtin.	done
NV_depth_buffer_float	done
NV_conditional_render	done

OpenGL 3.1

Extension	Status
GLSL 1.40	done
ARB_texture_rectangle	done
ARB_draw_instanced	done
ARB_texture_buffer_object	done
ARB_uniform_buffer_object	done except for data layout queries
ARB_copy_buffer	done
EXT_texture_snorm	done
NV_primitive_restart

OpenGL 3.2

Extension	Status
GLSL 1.50	done
ARB_geometry_shader4	missing some limit queries
ARB_depth_clamp	done
ARB_draw_elements_base_vertex	done
ARB_fragment_coord_conventions	done (shading language only)
ARB_provoking_vertex	done
ARB_seamless_cube_map	done
ARB_sync
ARB_texture_multisample	missing sample location queries and sample mask
ARB_vertex_array_bgra	done

OpenGL 3.3

Extension	Status
GLSL 3.30	done
ARB_instanced_arrays	done
ARB_blend_func_extended	done
ARB_explicit_attrib_location	done (shading language only)
ARB_occlusion_query2	done
ARB_sampler_objects
ARB_shader_bit_encoding	done (shading language only)
ARB_texture_rgb10_a2ui	done
ARB_texture_swizzle	done
ARB_timer_query	missing direct query
ARB_vertex_type_2_10_10_10_rev	done

OpenGL 4.0

Extension	Status
GLSL 4.00	done
ARB_draw_buffers_blend	done
ARB_sample_shading	done
ARB_texture_cube_map_array	done
ARB_texture_gather	missing limit queries
ARB_texture_query_lod	done (shading language only)
ARB_draw_indirect
ARB_gpu_shader5	missing limit queries
ARB_gpu_shader_fp64	done
ARB_shader_subroutine
ARB_tessellation_shader	done except for `MAX_TESS_GEN_LEVEL` and `MAX_TESS_PATCH_COMPONENTS` queries
ARB_texture_buffer_object_rgb32	done
ARB_transform_feedback2	done
ARB_transform_feedback3	missing indexed properties query

OpenGL 4.1

Extension	Status
GLSL 4.10	done
ARB_ES2_compatibility	only float depth clear
ARB_get_program_binary
ARB_separate_shader_objects	only direct uniform binding
ARB_shader_precision	done (shading language only)
ARB_vertex_attrib_64bit	done
ARB_viewport_array

OpenGL 4.2

Extension	Status
GLSL 4.20	done
ARB_texture_compression_bptc	done
ARB_base_instance	done
ARB_shading_language_420pack	done (shading language only)
ARB_transform_feedback_instanced	done
ARB_compressed_texture_pixel_storage	done
ARB_conservative_depth	done (shading language only)
ARB_internalformat_query
ARB_map_buffer_alignment	done
ARB_shader_atomic_counters	done
ARB_shader_image_load_store	done
ARB_shading_language_packing	done (shading language only)
ARB_texture_storage	done

OpenGL 4.3

Extension	Status
GLSL 4.30	done
ARB_arrays_of_arrays	done (shading language only)
ARB_ES3_compatibility	only conservative sample query and compression formats
ARB_clear_buffer_object
ARB_compute_shader	done except for indirect dispatch
ARB_copy_image
KHR_debug	missing log retrieval, sync, pipeline and sampler label
ARB_explicit_uniform_location	done
ARB_fragment_layer_viewport	done (shading language only)
ARB_framebuffer_no_attachments	done
ARB_internalformat_query2	only compressed texture block queries
ARB_invalidate_subdata	done
ARB_multi_draw_indirect
ARB_program_interface_query
ARB_robust_buffer_access_behavior	done (nothing to do)
ARB_shader_image_size	done (shading language only)
ARB_shader_storage_buffer_object	missing (unneeded) block binding
ARB_stencil_texturing	done
ARB_texture_buffer_range	done
ARB_texture_query_levels	done (shading language only)
ARB_texture_storage_multisample	done
ARB_texture_view	done
ARB_vertex_attrib_binding

OpenGL 4.4

Extension	Status
GLSL 4.40	done
`GL_MAX_VERTEX_ATTRIB_STRIDE`
ARB_buffer_storage	done
ARB_clear_texture
ARB_enhanced_layouts	done (shading language only)
ARB_multi_bind	missing sampler and vertex buffer binding
ARB_query_buffer_object
ARB_texture_mirror_clamp_to_edge	done
ARB_texture_stencil8	done
ARB_vertex_type_10f_11f_11f_rev	done

OpenGL 4.5

Extension	Status
GLSL 4.50	done
ARB_ES3_1_compatibility	done
ARB_clip_control	done
ARB_conditional_render_inverted	done
ARB_cull_distance	done
ARB_derivative_control	done (shading language only)
ARB_direct_state_access	done for implemented functionality
ARB_get_texture_sub_image	done
ARB_shader_texture_image_samples	done (shading language only)
ARB_texture_barrier	done
KHR_context_flush_control
KHR_robustness

OpenGL 4.6

Extension	Status
GLSL 4.60	done
ARB_indirect_parameters
ARB_shader_draw_parameters	done (shading language only)
ARB_shader_group_vote	done (shading language only)
ARB_pipeline_statistics_query	done
ARB_transform_feedback_overflow_query	done
ARB_shader_atomic_counter_ops	done (shading language only)
ARB_gl_spirv
ARB_polygon_offset_clamp
ARB_spirv_extensions
ARB_texture_filter_anisotropic	done
KHR_no_error	done

ARB / Khronos OpenGL extensions

Extension	Status
ARB_robustness	done
KHR_texture_compression_astc_hdr	done
ARB_robustness_isolation	done
ARB_bindless_texture
ARB_compute_variable_group_size
ARB_seamless_cubemap_per_texture
ARB_sparse_texture
ARB_sparse_buffer
ARB_ES3_2_compatibility
ARB_sample_locations
KHR_texture_compression_astc_ldr	done
KHR_robust_buffer_access_behavior	done (nothing to do)
KHR_blend_equation_advanced	done
KHR_blend_equation_advanced_coherent	done
KHR_texture_compression_astc_sliced_3d	done (nothing to do)
KHR_parallel_shader_compile	missing thread count setting

Vendor OpenGL extensions

Extension	Status
AMD_transform_feedback3_lines_triangles	done (nothing to do)
AMD_sample_positions
AMD_vertex_shader_layer	done (shading language only)
AMD_shader_trinary_minmax	done (shading language only)
AMD_shader_explicit_vertex_parameter	done (shading language only)
ATI_texture_mirror_once	done (GL 4.4 subset)
EXT_texture_filter_anisotropic	done
EXT_texture_compression_s3tc	done
EXT_texture_mirror_clamp	only GL 4.4 subset
EXT_texture_compression_dxt1	done
EXT_texture_sRGB_decode	done
EXT_shader_integer_mix	done (shading language only)
EXT_debug_label	missing pipeline and sampler label
EXT_debug_marker	done
EXT_texture_sRGB_R8	done
EXT_texture_sRGB_RG8	done
GREMEDY_string_marker	done
INTEL_blackhole_render	done
NV_geometry_shader_passthrough	done (shading language only)
NV_sample_locations
NV_fragment_shader_barycentric	done (shading language only)
OVR_multiview
OVR_multiview2

OpenGL ES 2.0

Features that have their equivalents implemented in desktop version are supported. ESSL 1.00 is supported.

OpenGL ES 3.0

Features that have their equivalents implemented in desktop version are supported. ESSL 3.00 is supported.

OpenGL ES 3.1

Features that have their equivalents implemented in desktop version are supported. ESSL 3.10 is supported.

OpenGL ES 3.2

Features that have their equivalents implemented in desktop version are supported. ESSL 3.20 is supported.

Extension	Status
EXT_color_buffer_half_float
EXT_color_buffer_float
EXT_copy_image
EXT_draw_buffers_indexed	done
EXT_geometry_shader	missing some ES-specific limit queries
EXT_gpu_shader5	done (shading language only)
EXT_shader_io_blocks	done (shading language only)
EXT_tessellation_shader	done except for `MAX_TESS_GEN_LEVEL` and `MAX_TESS_PATCH_COMPONENTS` queries
EXT_texture_border_clamp	done
EXT_texture_buffer	done
EXT_texture_cube_map_array	done
EXT_primitive_bounding_box
KHR_texture_compression_astc_ldr	done
KHR_debug	see above
KHR_blend_equation_advanced	done
KHR_robustness
KHR_robust_buffer_access_behavior	done (nothing to do)
OES_sample_shading	done
OES_sample_variables	done (shading language only)
OES_shader_image_atomic	done (shading language only)
OES_shader_multisample_interpolation
OES_texture_stencil8	done
OES_texture_storage_multisample_2d_array	done

OpenGL ES 2.0 extensions to match ES 3.0 functionality

Unless said otherwise, these are not exposed in the GL::Extensions namespace on OpenGL ES 3.0 builds.

Extension	Status
ANGLE_framebuffer_blit	done
ANGLE_framebuffer_multisample	done
ANGLE_instanced_arrays	done
ANGLE_depth_texture	done
ANGLE_compressed_texture_etc (unlisted)	done
APPLE_framebuffer_multisample	done (ES 3.0 subset)
APPLE_texture_max_level	done
ARM_rgba8	done
EXT_texture_type_2_10_10_10_REV	done
EXT_discard_framebuffer	done
EXT_blend_minmax	done
EXT_shader_texture_lod	done (shading language only)
EXT_unpack_subimage	done
EXT_occlusion_query_boolean	done
EXT_shadow_samplers	done
EXT_texture_rg	done
EXT_sRGB	done
EXT_texture_storage	done
EXT_map_buffer_range	done
EXT_draw_buffers	done
EXT_instanced_arrays	done
EXT_draw_instanced	done
`MAGNUM_shader_vertex_id` Pseudo-extension denoting support for the `gl_VertexID` GLSL builtin. Exposed on ES3 builds only.	done
NV_draw_buffers	done
NV_fbo_color_attachments	done
NV_read_buffer	done
NV_pack_subimage	done
NV_draw_instanced	done
NV_framebuffer_blit	done
NV_framebuffer_multisample	done
NV_instanced_arrays	done
NV_shadow_samplers_array	done (shading language only)
NV_shadow_samplers_cube	done (shading language only)
OES_depth24	done
OES_element_index_uint	done
OES_fbo_render_mipmap	done
OES_rgb8_rgba8	done (desktop-compatible subset)
OES_texture_3D	done
OES_texture_half_float_linear	done
OES_texture_half_float	done
OES_texture_float	done
OES_texture_npot	done (nothing to do)
OES_vertex_half_float	done
OES_packed_depth_stencil	done
OES_depth_texture	done
OES_standard_derivatives	done
OES_vertex_array_object	done
OES_required_internalformat	done (desktop-compatible subset)
OES_surfaceless_context	done

OpenGL ES extensions

Extension	Status
ANDROID_extension_pack_es31a	done (nothing to do)
ANGLE_texture_compression_dxt1	done
ANGLE_texture_compression_dxt3	done
ANGLE_texture_compression_dxt5	done
ANGLE_multi_draw (unlisted)	done
ANGLE_base_vertex_base_instance (unlisted)	done
ANGLE_provoking_vertex (unlisted)	done
ANGLE_polygon_mode (unlisted)	done
ANGLE_stencil_texturing (unlisted)	done
APPLE_texture_format_BGRA8888	done
APPLE_clip_distance	done
ARM_shader_framebuffer_fetch	missing renderer setup and limit query
ARM_shader_framebuffer_fetch_depth_stencil	done (shading language only)
EXT_texture_filter_anisotropic	done
EXT_texture_compression_dxt1	done
EXT_texture_format_BGRA8888	done
EXT_read_format_bgra	done
EXT_multi_draw_arrays	done
EXT_debug_label	see above
EXT_debug_marker	done
EXT_separate_shader_objects	only direct uniform binding
EXT_multisampled_render_to_texture	only renderbuffer storage
EXT_robustness	done
EXT_shader_framebuffer_fetch	missing limit query
EXT_disjoint_timer_query	only time elapsed query
EXT_texture_sRGB_decode	done
EXT_sRGB_write_control	done
EXT_texture_compression_s3tc	done
EXT_pvrtc_sRGB	done
EXT_shader_integer_mix	done (shading language only)
EXT_texture_view	done
EXT_draw_elements_base_vertex	done
EXT_texture_norm16	done
EXT_texture_sRGB_R8	done
EXT_texture_sRGB_RG8	done
EXT_buffer_storage	done
EXT_blend_func_extended	done
EXT_polygon_offset_clamp
EXT_clip_cull_distance	done
EXT_texture_compression_rgtc	done
EXT_texture_compression_bptc	done
EXT_texture_compression_s3tc_srgb	done
EXT_clip_control	done
EXT_texture_mirror_clamp_to_edge	done
EXT_depth_clamp	done
IMG_texture_compression_pvrtc	done
INTEL_blackhole_render	done
KHR_texture_compression_astc_hdr	done
KHR_blend_equation_advanced_coherent	done
KHR_context_flush_control
KHR_no_error	done
KHR_texture_compression_astc_sliced_3d	done (nothing to do)
KHR_parallel_shader_compile	missing thread count setting
NV_read_buffer_front	done
NV_read_depth	done
NV_read_stencil	done
NV_read_depth_stencil	done
NV_texture_border_clamp	done
NV_shader_noperspective_interpolation	done (shading language only)
NV_geometry_shader_passthrough	done (shading language only)
NV_sample_locations
NV_polygon_mode	done
OES_depth32	done
OES_mapbuffer	done
OES_stencil1	done
OES_stencil4	done
OES_texture_float_linear	done
OES_texture_view	done
OES_draw_elements_base_vertex	done
OVR_multiview
OVR_multiview2

Extension	Status
ANGLE_instanced_arrays	done
EXT_frag_depth	done (shading language only)
EXT_sRGB	done
EXT_blend_minmax	done
EXT_shader_texture_lod	done (shading language only)
`MAGNUM_shader_vertex_id` Pseudo-extension denoting support for the `gl_VertexID` GLSL builtin. Exposed on WebGL 2 builds only.	done
OES_texture_float	done
OES_texture_half_float	done
OES_standard_derivatives	done
OES_vertex_array_object	done
OES_element_index_uint	done
OES_texture_half_float_linear	done
OES_fbo_render_mipmap	done
WEBGL_depth_texture	done
WEBGL_color_buffer_float
WEBGL_draw_buffers	done

WebGL extensions

Extension	Status
EXT_texture_filter_anisotropic	done
EXT_color_buffer_half_float
EXT_disjoint_timer_query	only time elapsed query
EXT_disjoint_timer_query_webgl2	done
EXT_color_buffer_float
EXT_float_blend
EXT_texture_compression_rgtc	done
EXT_texture_compression_bptc	done
EXT_texture_norm16	done
EXT_polygon_offset_clamp
EXT_clip_control	done
EXT_depth_clamp	done
EXT_texture_mirror_clamp_to_edge	done
KHR_parallel_shader_compile	done
`MAGNUM_compressed_texture_astc_ldr`, `MAGNUM_compressed_texture_astc_hdr` Pseudo-extension denoting support for WEBGL_compressed_texture_astc LDR and HDR profile	done
NV_shader_noperspective_interpolation	done (shading language only)
OES_texture_float_linear	done
OES_draw_buffers_indexed (originally named `EXT_draw_buffers_indexed`)	done
OVR_multiview2
WEBGL_lose_context
WEBGL_debug_renderer_info	done
WEBGL_debug_shaders
WEBGL_compressed_texture_s3tc	done
WEBGL_compressed_texture_pvrtc	done
WEBGL_compressed_texture_etc	done
WEBGL_compressed_texture_astc	done
WEBGL_compressed_texture_s3tc_srgb	done
WEBGL_multi_draw	done
WEBGL_blend_equation_advanced_coherent	done
WEBGL_clip_cull_distance (originally named `EXT_clip_cull_distance`)	done
WEBGL_draw_instanced_base_vertex_base_instance	done
WEBGL_multi_draw_instanced_base_vertex_base_instance	done
WEBGL_provoking_vertex	missing support in Emscripten
WEBGL_polygon_mode	done
WEBGL_blend_func_extended	done
WEBGL_stencil_texturing	done

Unsupported OpenGL features

Some functionality, which is either soon-to-be deprecated or isn't proven to add any performance gains, is not supported in Magnum. See also Deprecated OpenGL API list.

Unsupported features

API that is not part of core profile or is marked as deprecated (but still supported in core profile) in the latest version of OpenGL specification is not supported. The only exception are features that are needed for some OpenGL ES 2.0 implementations (such as luminance texture formats).
State queries (various glIs*(), glGet*() functions) are not supported. Magnum API is designed to prevent the need for majority of them, many of them are tracked internally to avoid redundant state changes and in many cases it is easier to set the state to some value rather than query it and then decide on the result. For detailed state introspection please use external debugger (such as ApiTrace), which is more convenient to use than manual queries. Queries of implementation-defined values (various limits etc.) and queries of generated values (buffer data, texture data) are supported.
Line and polygon smoothing (GL_LINE_SMOOTH, GL_POLYGON_SMOOTH) and related functions are not supported, as the driver might do it in software with serious performance drops. Multisampling is far superior solution.
Fixed precision data types (GL_FIXED in OpenGL ES) are not supported, as they occupy the same memory as floats and they aren't faster than floats on current hardware anymore. They are also not available in WebGL or desktop GL.
Shader compiler is assumed to be present (GL_SHADER_COMPILER returning true), as all desktop GL implementations and also ES3 are required to support it.
Querying shader attribute locations using glGetAttribLocation() and other resources using glGetProgramResource(), glGetProgramResourceIndex(), glGetProgramResourceLocation(), glGetProgramResourceLocationIndex() or glGetProgramResourceName() (as opposed to setting them) is not supported, as newer GL versions encourage setting them explicitly in shader code.
Direct vertex data specification (as opposed to using buffers) is not supported, as it encourages bad practices.
glPixelStore() with GL_PACK_SWAP_BYTES / GL_UNPACK_SWAP_BYTES. Too much burden imposed on every API that deals with pixel storage. Use Corrade::Utility::Endianness instead. Note that this state is also not tracked, so it won't get reset in case a 3rd party code enables it.

Unsupported ARB / Khronos extensions

ARB_shading_language_include is overly complicated and supported exclusively by NVidia. However, see the GlslangShaderConverter plugin for shader preprocessing/compilation that does support #include directives.
ARB_cl_event seems to be not supported anywhere
ARB_shader_stencil_export is supported exclusively by AMD
EXT_texture_compression_latc is superseded by EXT_texture_compression_rgtc, available in OpenGL 3.0.

Unsupported vendor extensions

INTEL_map_texture negatively affects texture access performance. Combination of buffer mapping and pixel buffers might be of the same or better performance, without affecting texture access speed.
NV_draw_texture can be done with framebuffer blitting and doesn't make any full-screen postprocessing easier, as shaders are excluded.
IMG_texture_compression_pvrtc2 OpenGL ES extension is not supported as there is no equivalent in WebGL nor Metal and all hardware having support for it suppors other formats as well.

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