GLISENABLED(3gl)GLISENABLED(3gl)NAMEglIsEnabled - test whether a capability is enabled
C SPECIFICATION
GLboolean glIsEnabled( GLenum cap )
PARAMETERS
cap Specifies a symbolic constant indicating a GL capability.
DESCRIPTIONglIsEnabled returns GL_TRUE if cap is an enabled capability and returns
GL_FALSE otherwise. Initially all capabilities except GL_DITHER and
GL_VIDEO_RESIZE_COMPENSATION_SUN are disabled; GL_DITHER and
GL_VIDEO_RESIZE_COMPENSATION_SUN are initially enabled.
The following capabilities are accepted for cap:
Constant See
────────────────────────────────────────────────────────────────────────────────────────────
GL_ALPHA_TEST glAlphaFunc
GL_AUTO_NORMAL glEvalCoord
GL_BLEND glBlendFunc, glLogicOp
GL_CLIP_PLANEi glClipPlane
GL_COLOR_ARRAY glColorPointer
GL_COLOR_LOGIC_OP glLogicOp
GL_COLOR_MATERIAL glColorMaterial
GL_COLOR_SUM_ARB glSecondaryColor
GL_CONVOLUTION_1D_EXT glConvolutionFilter1DEXT
GL_CONVOLUTION_2D_EXT glConvolutionFilter2DEXT
GL_CULL_FACE glCullFace
GL_DEPTH_TEST glDepthFunc, glDepthRange
GL_DITHER glEnable
GL_EDGE_FLAG_ARRAY glEdgeFlagPointer
GL_FOG glFog
GL_FRAGMENT_PROGRAM_ARB glProgramStringARB, glBindProgramARB
GL_GLOBAL_ALPHA_SUN glGlobalAlphaFactorSUN
GL_HISTOGRAM_EXT glHistogramEXT
GL_INDEX_ARRAY glIndexPointer
GL_INDEX_LOGIC_OP glLogicOp
GL_LIGHTi glLightModel, glLight
GL_LIGHTING glMaterial, glLightModel, glLight
GL_LINE_SMOOTH glLineWidth
GL_LINE_STIPPLE glLineStipple
GL_MAP1_COLOR_4 glMap1, glMap2
GL_MAP2_TEXTURE_COORD_2 glMap2
GL_MAP2_TEXTURE_COORD_3 glMap2
GL_MAP2_TEXTURE_COORD_4 glMap2
GL_MAP2_VERTEX_3 glMap2
GL_MAP2_VERTEX_4 glMap2
GL_MINMAX_EXT glMinmaxEXT
GL_NORMAL_ARRAY glNormalPointer
GL_NORMALIZE glNormal
GL_POINT_SMOOTH glPointSize
GL_POLYGON_SMOOTH glPolygonMode
GL_POLYGON_OFFSET_EXT glPolygonOffsetEXT
GL_POLYGON_OFFSET_FILL glPolygonOffset
GL_POLYGON_OFFSET_LINE glPolygonOffset
GL_POLYGON_OFFSET_POINT glPolygonOffset
GL_POLYGON_STIPPLE glPolygonStipple
GL_POST_CONVOLUTION_COLOR_TABLE_SGI glColorTableSGI
GL_SCISSOR_TEST glScissor
GL_SEPARABLE_2D_EXT glSeparableFilter2DEXT
GL_STENCIL_TEST glStencilFunc, glStencilOp
GL_TEXTURE_1D glTexImage1D
GL_TEXTURE_2D glTexImage2D
GL_TEXTURE_CUBE_MAP glTexImage2D
GL_TEXTURE_COORD_ARRAY glTexCoordPointer
GL_TEXTURE_GEN_Q glTexGen
GL_TEXTURE_GEN_R glTexGen
GL_TEXTURE_GEN_S glTexGen
GL_TEXTURE_GEN_T glTexGen
GL_VERTEX_ARRAY glVertexPointer
GL_VERTEX_PROGRAM_ARB glProgramStringARB, glBindProgramARB
GL_VERTEX_PROGRAM_POINT_SIZE_ARB glProgramStringARB, glBindProgramARB
GL_VERTEX_PROGRAM_TWO_SIDE_ARB glProgramStringARB, glBindProgramARB
GL_MULTISAMPLE_ARB glSampleCoverageARB
GL_SAMPLE_ALPHA_TO_COVERAGE_ARB glSampleCoverageARB
GL_SAMPLE_ALPHA_TO_ONE_ARB glSampleCoverageARB
GL_SAMPLE_COVERAGE_ARB glSampleCoverageARB
GL_VIDEO_RESIZE_COMPENSATION_SUN glXVideoResizeSUN
GL_TEXTURE_TARGET_SUN glSetTextureTargetiSUN, glSetTextureTargetModeSUN
NOTES
If an error is generated, glIsEnabled returns 0.
GL_COLOR_LOGIC_OP, GL_COLOR_ARRAY, GL_EDGE_FLAG_ARRAY, GL_INDEX_ARRAY,
GL_INDEX_LOGIC_OP, GL_NORMAL_ARRAY, GL_POLYGON_OFFSET_EXT, GL_POLY‐
GON_OFFSET_FILL, GL_POLYGON_OFFSET_LINE, GL_POLYGON_OFFSET_POINT,
GL_TEXTURE_COORD_ARRAY, and GL_VERTEX_ARRAY are only available if the
GL version is 1.1 or greater
GL_VIDEO_RESIZE_COMPENSATION_SUN is only available if the GL implemeta‐
tion supports GLX_SUN_video_resize extension.
ERRORS
GL_INVALID_ENUM is generated if cap is not an accepted value.
GL_INVALID_OPERATION is generated if glIsEnabled is executed between
the execution of glBegin and the corresponding execution of glEnd.
SEE ALSO
glEnable, glEnableClientState
1 June 01 GLISENABLED(3gl)