Module info

This module provide information about the current GL context.

The functions provided in here map largely 1:1 to OpenGL calls to glGet in varying capacities.

Structs

• ExtensionIter
  An iterator over the extensions supported by the current GL context.

Functions

• extension
  Returns the name of the extension at the given index.
• extensions
  Returns an iterator over all the extensions supported by the current GL context.
• max_3d_texture_size
  Gets a rough estimate of the largest 3D texture that the GL can handle. The value must be at least 64.
• max_3d_texture_size_checked
  Gets a rough estimate of the largest 3D texture that the GL can handle. The value must be at least 64.
• max_array_texture_layers
  Gets the maximum number of layers allowed in an array texture, and must be at least 256.
• max_array_texture_layers_checked
  Gets the maximum number of layers allowed in an array texture, and must be at least 256.
• max_clip_distances
  Gets the maximum number of texture units that can be used in a fragment shader.
• max_color_attachments
  Gets the maximum number of color attachments that can be used in a fragment shader.
• max_color_texture_samples
  Gets the maximum number of samples in a color multisample texture.
• max_combined_atomic_counters
  Gets the maximum number of atomic counters available to all active shaders.
• max_combined_fragment_uniform_components
  Gets the number of words for fragment shader uniform variables in all uniform blocks (including default). The value must be at least 1.
• max_combined_geometry_uniform_components
  Gets the number of words for geometry shader uniform variables in all uniform blocks (including default). The value must be at least 1.
• max_combined_texture_image_units
  Gets the maximum supported texture image units that can be used to access texture maps from the vertex shader and the fragment processor combined. If both the vertex shader and the fragment processing stage access the same texture image unit, then that counts as using two texture image units against this limit. The value must be at least 48.
• max_combined_uniform_blocks
  Gets the maximum number of uniform blocks per program. The value must be at least 70.
• max_combined_vertex_uniform_components
  Gets the number of words for vertex shader uniform variables in all uniform blocks (including default). The value must be at least 1.
• max_cube_map_texture_size
  Gets the max cube map texture size.
• max_depth_texture_samples
  Gets the maximum depth texture samples.
• max_draw_buffers
  Gets the maximum draw buffers.
• max_dual_source_draw_buffers
  Gets the maximum dual-source draw buffers.
• max_elements_indices
  Gets the max elements indices that can be used in a draw call.
• max_elements_vertices
  Gets the max elements vertices that can be used in a draw call.
• max_fragment_input_components
  Gets the maximum fragment input components.
• max_fragment_shader_storage_blocks
  Gets the maximum fragment shader storage block.
• max_fragment_uniform_blocks
  Gets the maximum fragment output components.
• max_fragment_uniform_components
  Gets the maximum fragment uniform components.
• max_fragment_uniform_vectors
  Gets the maximum fragment uniform vectors.
• max_framebuffer_height
  Gets the maximum frame-buffer height.
• max_framebuffer_layers
  Gets the maximum frame-buffer layers.
• max_framebuffer_samples
  Gets the maximum frame-buffer samples.
• max_framebuffer_width
  Gets the maximum frame-buffer width.
• max_geometry_atomic_counters
  Gets the maximum atomic counters for geometry shaders.
• max_geometry_input_components
  Gets the maximum geometry input components.
• max_geometry_output_components
  Gets the maximum geometry-shader output components.
• max_geometry_output_vertices
  Gets the maximum geometry-shader output vertices.
• max_geometry_shader_storage_blocks
  Gets the maximum geometry shader storage blocks.
• max_geometry_texture_image_units
  Gets the maximum geometry shader texture image units.
• max_geometry_uniform_blocks
  Gets the maximum geometry shader uniform blocks.
• max_geometry_uniform_components
  Gets the maximum geometry shader uniform components.
• max_integer_samples
  Gets the maximum integer samples.
• max_label_length
  Gets the max label length.
• max_program_texel_offset
  Gets the max progarm texel offset.
• max_rectangle_texture_size
  Gets the max rectangular texture size.
• max_renderbuffer_size
  Gets the max render-buffer size.
• max_sample_mask_words
  Gets the max sample mask words.
• max_server_wait_timeout
  Gets the max server-wait timeout
• max_shader_storage_buffer_bindings
  Gets the max shader storage buffer bindings.
• max_tess_control_atomic_counters
  Gets the max tesselation control atomic counters.
• max_tess_control_shader_storage_blocks
  Gets the max tesselation control shader storage blocks.
• max_tess_evaluation_atomic_counters
  Gets the max tesselation evaluation atomic counters.
• max_tess_evaluation_shader_storage_blocks
  Gets the max tesselation evaluation shader storage blocks.
• max_texture_buffer_size
  Gets the max texture buffer size.
• max_texture_image_units
  Gets the max texture image units.
• max_texture_lod_bias
  Gets the max texture LOD bias.
• max_texture_size
  Gets the maximum number of texture units that can be used in a fragment shader.
• max_texture_size_checked
  Gets the maximum number of texture units that can be used in a fragment shader.
• max_uniform_block_size
  Gets the maximum size in basic machine units of a uniform block.
• max_uniform_buffer_bindings
  Gets the maximum number of uniform buffer bindings that can be used in a vertex shader.
• max_uniform_locations
  Gets the maximum number of uniform locations that can be used in a vertex shader.
• max_varying_components
  Gets the maximum number of vertex shader storage blocks that can be used in a vertex shader.
• max_varying_floats
  Gets the maximum number of varying floats that can be used.
• max_varying_vectors
  Gets the maximum number of varying vectors that can be used in a vertex shader.
• max_vertex_attribs
  Gets the maximum number of vertex attributes that can be used.
• max_vertex_output_components
  Gets the maximum number of vertex output components.
• max_vertex_shader_storage_blocks
  Gets the maximum number of vertex shader storage blocks.
• max_vertex_texture_image_units
  Gets the maximum number of vertex texture image units.
• max_vertex_uniform_blocks
  Gets the maximum number of vertex shader uniform blocks.
• max_vertex_uniform_components
  Gets the maximum number of vertex uniform components.
• max_vertex_uniform_vectors
  Gets the maximum number of vertex uniform vectors.
• max_viewport_dimensions
  Gets the maximum number of dimensions the viewport can have.
• max_viewports
  Gets the maximum number of viewports that can be used.
• min_map_buffer_alignment
  Gets the min-map buffer alignment.
• num_extensions
  Gets the number of extensions supported by the current GL context.
• renderer
  Gets a string for the renderer name.
• shading_language_version
  Gets a string for the shading language version.
• supported_version
  Gets the supported version of OpenGL as defined by the GL_MAJOR_VERSION and GL_MINOR_VERSION values returned from the current context.
• supported_version_checked
  Gets the supported version of OpenGL as defined by the GL_MAJOR_VERSION and GL_MINOR_VERSION values returned from the current context.
• vendor
  Gets a string for the vendor name.
• version
  Gets a string for the version.