java.lang.Object
- com.openinventor.inventor.Inventor
- - com.openinventor.inventor.devices.SoGLExtension

```
public class SoGLExtension
extends Inventor
```
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.
```
 SoGLContext glContext = new SoGLContext( true );
 glContext.bind();
     boolean ok = SoGLExtension.isAvailable( "GL_ARB_vertex_program" );
 glContext.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

Nested Class Summary
- Nested classes/interfaces inherited from class com.openinventor.inventor.Inventor
  Inventor.ConstructorCommand

Field Summary
- Fields inherited from class com.openinventor.inventor.Inventor
  VERBOSE_LEVEL, ZeroHandle

Method Summary

All Methods Static Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`static void`	`disableExtension(java.lang.String extension)`	Disable a specific extension in software.
`static boolean`	`isAvailable(java.lang.String extension)`	Returns true if the extension is available.
`void`	`setValue(SoGLExtension copyFrom)`

Methods inherited from class com.openinventor.inventor.Inventor
dispose, getNativeResourceHandle

Methods inherited from class java.lang.Object
equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- Method Detail
  - setValue
```
public void setValue(SoGLExtension copyFrom)
```
  - disableExtension
```
public static void disableExtension(java.lang.String extension)
```
    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
```
public static boolean isAvailable(java.lang.String extension)
```
    Returns true if the extension is available.

Class SoGLExtension

Nested Class Summary

Nested classes/interfaces inherited from class com.openinventor.inventor.Inventor

Field Summary

Fields inherited from class com.openinventor.inventor.Inventor

Method Summary

Methods inherited from class com.openinventor.inventor.Inventor

Methods inherited from class java.lang.Object

Method Detail

setValue

disableExtension

isAvailable