SoGLExtension Class Reference

Contains methods to query and disable OpenGL extensions. More...

#include <Inventor/devices/SoGLExtension.h>

Static Public Member Functions
static SbBool	isAvailable (const char *extension)
	Returns true if the extension is available.
static SbBool	isAvailable (const SbString &extension)
	Returns true if the extension is available.
static void	disableExtension (const SbString &extension)
	Disable a specific extension in software.

Detailed Description

Contains methods to query and disable OpenGL extensions.

SoGLExtension is based on GLEW (the OpenGL Extension Wrangler library). The OpenGL Extension Wrangler Library (GLEW) is a cross-platform, open-source extension loading library. GLEW provides efficient run-time mechanisms for determining which OpenGL extensions are supported on the current platform. Once an extension is known to be present, the function linked to that extension can be called directly.

EXAMPLE

Here is an example of checking if a GL extension is present.
Note that the isAvailable() method will normally succeed even if no context is currently bound. In that case it creates its own temporary context automatically, but a warning message is posted when using a debug build of Open Inventor.

SoRef<SoGLContext> context = new SoGLContext( true );
context->bind();
  SbBool ok = SoGLExtension::isAvailable( "GL_ARB_vertex_program" );
context->unbind();

NOTES

The SoGLExtension header file must be included before any OpenGL header files.

The following list categorizes the extensions that can be queried with isAvailable():

• GL_VERSION_1_1
• GL_VERSION_1_2
• GL_VERSION_1_3
• GL_VERSION_1_4
• GL_VERSION_1_5
• GL_VERSION_2_0
• GL_VERSION_2_1
• GL_VERSION_3_0
• GL_VERSION_3_1
• GL_VERSION_3_2
• GL_VERSION_3_3
• GL_VERSION_4_0
• GL_VERSION_4_1

3DFX

• GL_3DFX_multisample
• GL_3DFX_tbuffer
• GL_3DFX_texture_compression_FXT1

AMD

• GL_AMD_draw_buffers_blend
• GL_AMD_performance_monitor
• GL_AMD_texture_texture4
• GL_AMD_vertex_shader_tessellator
• GL_AMD_seamless_cubemap_per_texture
• GL_AMD_shader_stencil_export
• GL_AMD_conservative_depth
• GL_AMD_debug_output
• GL_AMD_name_gen_delete
• GL_AMD_transform_feedback3_lines_triangles
• GL_AMD_depth_clamp_separate

APPLE

• GL_APPLE_aux_depth_stencil
• GL_APPLE_client_storage
• GL_APPLE_element_array
• GL_APPLE_fence
• GL_APPLE_float_pixels
• GL_APPLE_flush_buffer_range
• GL_APPLE_object_purgeable
• GL_APPLE_pixel_buffer
• GL_APPLE_rgb_422
• GL_APPLE_row_bytes
• GL_APPLE_specular_vector
• GL_APPLE_texture_range
• GL_APPLE_transform_hint
• GL_APPLE_vertex_array_object
• GL_APPLE_vertex_array_range
• GL_APPLE_vertex_program_evaluators
• GL_APPLE_ycbcr_422

ARB

• GL_ARB_color_buffer_float
• GL_ARB_compatibility
• GL_ARB_copy_buffer
• GL_ARB_depth_buffer_float
• GL_ARB_depth_clamp
• GL_ARB_depth_texture
• GL_ARB_draw_buffers
• GL_ARB_draw_buffers_blend
• GL_ARB_draw_elements_base_vertex
• GL_ARB_draw_instanced
• GL_ARB_fragment_coord_conventions
• GL_ARB_fragment_program
• GL_ARB_fragment_program_shadow
• GL_ARB_fragment_shader
• GL_ARB_framebuffer_object
• GL_ARB_framebuffer_sRGB
• GL_ARB_geometry_shader4
• GL_ARB_half_float_pixel
• GL_ARB_half_float_vertex
• GL_ARB_imaging
• GL_ARB_instanced_arrays
• GL_ARB_map_buffer_range
• GL_ARB_matrix_palette
• GL_ARB_multisample
• GL_ARB_multitexture
• GL_ARB_occlusion_query
• GL_ARB_pixel_buffer_object
• GL_ARB_point_parameters
• GL_ARB_point_sprite
• GL_ARB_provoking_vertex
• GL_ARB_sample_shading
• GL_ARB_seamless_cube_map
• GL_ARB_shader_objects
• GL_ARB_shader_texture_lod
• GL_ARB_shading_language_100
• GL_ARB_shadow
• GL_ARB_shadow_ambient
• GL_ARB_sync
• GL_ARB_texture_border_clamp
• GL_ARB_texture_buffer_object
• GL_ARB_texture_compression
• GL_ARB_texture_compression_rgtc
• GL_ARB_texture_cube_map
• GL_ARB_texture_cube_map_array
• GL_ARB_texture_env_add
• GL_ARB_texture_env_combine
• GL_ARB_texture_env_crossbar
• GL_ARB_texture_env_dot3
• GL_ARB_texture_float
• GL_ARB_texture_gather
• GL_ARB_texture_mirrored_repeat
• GL_ARB_texture_multisample
• GL_ARB_texture_non_power_of_two
• GL_ARB_texture_query_lod
• GL_ARB_texture_rectangle
• GL_ARB_texture_rg
• GL_ARB_transpose_matrix
• GL_ARB_uniform_buffer_object
• GL_ARB_vertex_array_bgra
• GL_ARB_vertex_array_object
• GL_ARB_vertex_blend
• GL_ARB_vertex_buffer_object
• GL_ARB_vertex_program
• GL_ARB_vertex_shader
• GL_ARB_window_pos
• GL_ARB_blend_func_extended
• GL_ARB_draw_indirect
• GL_ARB_explicit_attrib_location
• GL_ARB_gpu_shader5
• GL_ARB_gpu_shader_fp64
• GL_ARB_occlusion_query2
• GL_ARB_sampler_objects
• GL_ARB_shader_bit_encoding
• GL_ARB_shader_subroutine
• GL_ARB_shading_language_include
• GL_ARB_tessellation_shader
• GL_ARB_texture_buffer_object_rgb32
• GL_ARB_texture_compression_bptc
• GL_ARB_texture_rgb10_a2ui
• GL_ARB_texture_swizzle
• GL_ARB_timer_query
• GL_ARB_transform_feedback2
• GL_ARB_transform_feedback3
• GL_ARB_vertex_type_2_10_10_10_rev
• GL_ARB_ES2_compatibility
• GL_ARB_cl_event
• GL_ARB_debug_output
• GL_ARB_get_program_binary
• GL_ARB_robustness
• GL_ARB_separate_shader_objects
• GL_ARB_shader_precision
• GL_ARB_shader_stencil_export
• GL_ARB_vertex_attrib_64bit
• GL_ARB_viewport_array
  

ATI

• GL_ATIX_point_sprites
• GL_ATIX_texture_env_combine3
• GL_ATIX_texture_env_route
• GL_ATIX_vertex_shader_output_point_size
• GL_ATI_draw_buffers
• GL_ATI_element_array
• GL_ATI_envmap_bumpmap
• GL_ATI_fragment_shader
• GL_ATI_map_object_buffer
• GL_ATI_meminfo
• GL_ATI_pn_triangles
• GL_ATI_separate_stencil
• GL_ATI_shader_texture_lod
• GL_ATI_text_fragment_shader
• GL_ATI_texture_compression_3dc
• GL_ATI_texture_env_combine3
• GL_ATI_texture_float
• GL_ATI_texture_mirror_once
• GL_ATI_vertex_array_object
• GL_ATI_vertex_attrib_array_object
• GL_ATI_vertex_streams

EXT

• GL_EXT_422_pixels
• GL_EXT_Cg_shader
• GL_EXT_abgr
• GL_EXT_bgra
• GL_EXT_bindable_uniform
• GL_EXT_blend_color
• GL_EXT_blend_equation_separate
• GL_EXT_blend_func_separate
• GL_EXT_blend_logic_op
• GL_EXT_blend_minmax
• GL_EXT_blend_subtract
• GL_EXT_clip_volume_hint
• GL_EXT_cmyka
• GL_EXT_color_subtable
• GL_EXT_compiled_vertex_array
• GL_EXT_convolution
• GL_EXT_coordinate_frame
• GL_EXT_copy_texture
• GL_EXT_cull_vertex
• GL_EXT_depth_bounds_test
• GL_EXT_direct_state_access
• GL_EXT_draw_buffers2
• GL_EXT_draw_instanced
• GL_EXT_draw_range_elements
• GL_EXT_fog_coord
• GL_EXT_fragment_lighting
• GL_EXT_framebuffer_blit
• GL_EXT_framebuffer_multisample
• GL_EXT_framebuffer_object
• GL_EXT_framebuffer_sRGB
• GL_EXT_geometry_shader4
• GL_EXT_gpu_program_parameters
• GL_EXT_gpu_shader4
• GL_EXT_histogram
• GL_EXT_index_array_formats
• GL_EXT_index_func
• GL_EXT_index_material
• GL_EXT_index_texture
• GL_EXT_light_texture
• GL_EXT_misc_attribute
• GL_EXT_multi_draw_arrays
• GL_EXT_multisample
• GL_EXT_packed_depth_stencil
• GL_EXT_packed_float
• GL_EXT_packed_pixels
• GL_EXT_paletted_texture
• GL_EXT_pixel_buffer_object
• GL_EXT_pixel_transform
• GL_EXT_pixel_transform_color_table
• GL_EXT_point_parameters
• GL_EXT_polygon_offset
• GL_EXT_provoking_vertex
• GL_EXT_rescale_normal
• GL_EXT_separate_shader_objects
• GL_EXT_scene_marker
• GL_EXT_secondary_color
• GL_EXT_separate_specular_color
• GL_EXT_shadow_funcs
• GL_EXT_shared_texture_palette
• GL_EXT_stencil_clear_tag
• GL_EXT_stencil_two_side
• GL_EXT_stencil_wrap
• GL_EXT_subtexture
• GL_EXT_texture
• GL_EXT_texture3D
• GL_EXT_texture_array
• GL_EXT_texture_buffer_object
• GL_EXT_texture_compression_dxt1
• GL_EXT_texture_compression_latc
• GL_EXT_texture_compression_rgtc
• GL_EXT_texture_compression_s3tc
• GL_EXT_texture_cube_map
• GL_EXT_texture_edge_clamp
• GL_EXT_texture_env
• GL_EXT_texture_env_add
• GL_EXT_texture_env_combine
• GL_EXT_texture_env_dot3
• GL_EXT_texture_filter_anisotropic
• GL_EXT_texture_integer
• GL_EXT_texture_lod_bias
• GL_EXT_texture_mirror_clamp
• GL_EXT_texture_object
• GL_EXT_texture_perturb_normal
• GL_EXT_texture_rectangle
• GL_EXT_texture_snorm
• GL_EXT_texture_sRGB
• GL_EXT_texture_shared_exponent
• GL_EXT_texture_swizzle
• GL_EXT_timer_query
• GL_EXT_transform_feedback
• GL_EXT_vertex_array
• GL_EXT_vertex_array_bgra
• GL_EXT_vertex_shader
• GL_EXT_vertex_weighting
• GL_EXT_shader_image_load_store
• GL_EXT_vertex_attrib_64bit
• GL_EXT_texture_sRGB_decode
  

GRemedy

• GL_GREMEDY_frame_terminator
• GL_GREMEDY_string_marker

HP

• GL_HP_convolution_border_modes
• GL_HP_image_transform
• GL_HP_occlusion_test
• GL_HP_texture_lighting

IBM

• GL_IBM_cull_vertex
• GL_IBM_multimode_draw_arrays
• GL_IBM_rasterpos_clip
• GL_IBM_static_data
• GL_IBM_texture_mirrored_repeat
• GL_IBM_vertex_array_lists

INGR

• GL_INGR_color_clamp
• GL_INGR_interlace_read

Intel

• GL_INTEL_parallel_arrays
• GL_INTEL_texture_scissor

KTX

• GL_KTX_buffer_region

MESA

• GL_MESAX_texture_stack
• GL_MESA_pack_invert
• GL_MESA_resize_buffers
• GL_MESA_window_pos
• GL_MESA_ycbcr_texture

NVidia

• GL_NV_blend_square
• GL_NV_conditional_render
• GL_NV_copy_depth_to_color
• GL_NV_copy_image
• GL_NV_depth_buffer_float
• GL_NV_depth_clamp
• GL_NV_depth_range_unclamped
• GL_NV_evaluators
• GL_NV_explicit_multisample
• GL_NV_fence
• GL_NV_float_buffer
• GL_NV_fog_distance
• GL_NV_fragment_program
• GL_NV_fragment_program2
• GL_NV_fragment_program4
• GL_NV_fragment_program_option
• GL_NV_framebuffer_multisample_coverage
• GL_NV_geometry_program4
• GL_NV_geometry_shader4
• GL_NV_gpu_program4
• GL_NV_half_float
• GL_NV_light_max_exponent
• GL_NV_multisample_filter_hint
• GL_NV_occlusion_query
• GL_NV_packed_depth_stencil
• GL_NV_parameter_buffer_object
• GL_NV_parameter_buffer_object2
• GL_NV_pixel_data_range
• GL_NV_point_sprite
• GL_NV_present_video
• GL_NV_primitive_restart
• GL_NV_register_combiners
• GL_NV_register_combiners2
• GL_NV_shader_buffer_load
• GL_NV_texgen_emboss
• GL_NV_texgen_reflection
• GL_NV_texture_barrier
• GL_NV_texture_compression_vtc
• GL_NV_texture_env_combine4
• GL_NV_texture_expand_normal
• GL_NV_texture_rectangle
• GL_NV_texture_shader
• GL_NV_texture_shader2
• GL_NV_texture_shader3
• GL_NV_transform_feedback
• GL_NV_transform_feedback2
• GL_NV_vertex_array_range
• GL_NV_vertex_array_range2
• GL_NV_vertex_buffer_unified_memory
• GL_NV_vertex_program
• GL_NV_vertex_program1_1
• GL_NV_vertex_program2
• GL_NV_vertex_program2_option
• GL_NV_vertex_program3
• GL_NV_vertex_program4
• GL_NV_gpu_program5
• GL_NV_gpu_program_fp64
• GL_NV_gpu_shader5
• GL_NV_tessellation_program5
• GL_NV_vertex_attrib_integer_64bit
• GL_NV_multisample_coverage
• GL_NV_vdpau_interop
• GL_NVX_gpu_memory_info
  

OES

• GL_OES_byte_coordinates
• GL_OES_compressed_paletted_texture
• GL_OES_read_format
• GL_OES_single_precision

OML

• GL_OML_interlace
• GL_OML_resample
• GL_OML_subsample

PGI

• GL_PGI_misc_hints
• GL_PGI_vertex_hints

Rend

• GL_REND_screen_coordinates

S3

• GL_S3_s3tc

SGI

• GL_SGIS_color_range
• GL_SGIS_detail_texture
• GL_SGIS_fog_function
• GL_SGIS_generate_mipmap
• GL_SGIS_multisample
• GL_SGIS_pixel_texture
• GL_SGIS_point_line_texgen
• GL_SGIS_sharpen_texture
• GL_SGIS_texture4D
• GL_SGIS_texture_border_clamp
• GL_SGIS_texture_edge_clamp
• GL_SGIS_texture_filter4
• GL_SGIS_texture_lod
• GL_SGIS_texture_select
• GL_SGIX_async
• GL_SGIX_async_histogram
• GL_SGIX_async_pixel
• GL_SGIX_blend_alpha_minmax
• GL_SGIX_clipmap
• GL_SGIX_convolution_accuracy
• GL_SGIX_depth_texture
• GL_SGIX_flush_raster
• GL_SGIX_fog_offset
• GL_SGIX_fog_texture
• GL_SGIX_fragment_specular_lighting
• GL_SGIX_framezoom
• GL_SGIX_interlace
• GL_SGIX_ir_instrument1
• GL_SGIX_list_priority
• GL_SGIX_pixel_texture
• GL_SGIX_pixel_texture_bits
• GL_SGIX_reference_plane
• GL_SGIX_resample
• GL_SGIX_shadow
• GL_SGIX_shadow_ambient
• GL_SGIX_sprite
• GL_SGIX_tag_sample_buffer
• GL_SGIX_texture_add_env
• GL_SGIX_texture_coordinate_clamp
• GL_SGIX_texture_lod_bias
• GL_SGIX_texture_multi_buffer
• GL_SGIX_texture_range
• GL_SGIX_texture_scale_bias
• GL_SGIX_vertex_preclip
• GL_SGIX_vertex_preclip_hint
• GL_SGIX_ycrcb
• GL_SGI_color_matrix
• GL_SGI_color_table
• GL_SGI_texture_color_table

Sun

• GL_SUNX_constant_data
• GL_SUN_convolution_border_modes
• GL_SUN_global_alpha
• GL_SUN_mesh_array
• GL_SUN_read_video_pixels
• GL_SUN_slice_accum
• GL_SUN_triangle_list
• GL_SUN_vertex

Win

• GL_WIN_phong_shading
• GL_WIN_specular_fog
• GL_WIN_swap_hint

WGL

• WGL_3DFX_multisample
• WGL_3DL_stereo_control
• WGL_AMD_gpu_association
• WGL_ARB_buffer_region
• WGL_ARB_create_context
• WGL_ARB_create_context_profile
• WGL_ARB_extensions_string
• WGL_ARB_framebuffer_sRGB
• WGL_ARB_make_current_read
• WGL_ARB_multisample
• WGL_ARB_pbuffer
• WGL_ARB_pixel_format
• WGL_ARB_pixel_format_float
• WGL_ARB_render_texture
• WGL_ATI_pixel_format_float
• WGL_ATI_render_texture_rectangle
• WGL_EXT_depth_float
• WGL_EXT_display_color_table
• WGL_EXT_extensions_string
• WGL_EXT_framebuffer_sRGB
• WGL_EXT_make_current_read
• WGL_EXT_multisample
• WGL_EXT_pbuffer
• WGL_EXT_pixel_format
• WGL_EXT_pixel_format_packed_float
• WGL_EXT_swap_control
• WGL_I3D_digital_video_control
• WGL_I3D_gamma
• WGL_I3D_genlock
• WGL_I3D_image_buffer
• WGL_I3D_swap_frame_lock
• WGL_I3D_swap_frame_usage
• WGL_NV_copy_image
• WGL_NV_float_buffer
• WGL_NV_gpu_affinity
• WGL_NV_present_video
• WGL_NV_render_depth_texture
• WGL_NV_render_texture_rectangle
• WGL_NV_swap_group
• WGL_NV_vertex_array_range
• WGL_NV_video_output
• WGL_OML_sync_control
• WGL_NV_multisample_coverage
• WGL_ARB_create_context_robustness
• WGL_EXT_create_context_es2_profile

GLX

• GLX_VERSION_1_2
• GLX_VERSION_1_3
• GLX_VERSION_1_4
• GLX_3DFX_multisample
• GLX_ARB_create_context
• GLX_ARB_create_context_profile
• GLX_ARB_fbconfig_float
• GLX_ARB_framebuffer_sRGB
• GLX_ARB_get_proc_address
• GLX_ARB_multisample
• GLX_ARB_vertex_buffer_object
• GLX_ATI_pixel_format_float
• GLX_ATI_render_texture
• GLX_EXT_fbconfig_packed_float
• GLX_EXT_framebuffer_sRGB
• GLX_EXT_import_context
• GLX_EXT_scene_marker
• GLX_EXT_texture_from_pixmap
• GLX_EXT_visual_info
• GLX_EXT_visual_rating
• GLX_EXT_swap_control
• GLX_INTEL_swap_event
• GLX_MESA_agp_offset
• GLX_MESA_copy_sub_buffer
• GLX_MESA_pixmap_colormap
• GLX_MESA_release_buffers
• GLX_MESA_set_3dfx_mode
• GLX_NV_copy_image
• GLX_NV_float_buffer
• GLX_NV_present_video
• GLX_NV_swap_group
• GLX_NV_vertex_array_range
• GLX_NV_video_output
• GLX_OML_swap_method
• GLX_OML_sync_control
• GLX_SGIS_blended_overlay
• GLX_SGIS_color_range
• GLX_SGIS_multisample
• GLX_SGIS_shared_multisample
• GLX_SGIX_fbconfig
• GLX_SGIX_hyperpipe
• GLX_SGIX_pbuffer
• GLX_SGIX_swap_barrier
• GLX_SGIX_swap_group
• GLX_SGIX_video_resize
• GLX_SGIX_visual_select_group
• GLX_SGI_cushion
• GLX_SGI_make_current_read
• GLX_SGI_swap_control
• GLX_SGI_video_sync
• GLX_SUN_get_transparent_index
• GLX_SUN_video_resize
• GLX_AMD_gpu_association
• GLX_NV_multisample_coverage
• GLX_ARB_create_context_robustness
• GLX_EXT_create_context_es2_profile
  

Definition at line 668 of file SoGLExtension.h.

Member Function Documentation

disableExtension()

static void SoGLExtension::disableExtension ( const SbString &  extension )

static

Disable a specific extension in software.

The given extension will be disabled for any subsequent calls to isAvailable and for any existing contexts.

A list of extensions can be disabled using the environment variable OIV_DISABLED_GL_EXTENSION_LIST ( see SoPreferences ).

isAvailable() [1/2]

static SbBool SoGLExtension::isAvailable ( const char *  extension )

static

Returns true if the extension is available.

isAvailable() [2/2]

static SbBool SoGLExtension::isAvailable ( const SbString &  extension )

static

Returns true if the extension is available.

---

The documentation for this class was generated from the following file:

• Inventor/devices/SoGLExtension.h