1991-2006 Silicon Graphics, Inc. glIsEnabled 3G glIsEnabled test whether a capability is enabled GLboolean glIsEnabled GLenum cap cap Specifies a symbolic constant indicating a GL capability. glIsEnabled returns GL_TRUE if cap is an enabled capability and returns GL_FALSE otherwise. Initially all capabilities except GL_DITHER are disabled; GL_DITHER is 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 glSecondaryColor GL_COLOR_TABLE glColorTable GL_CONVOLUTION_1D glConvolutionFilter1D GL_CONVOLUTION_2D glConvolutionFilter2D GL_CULL_FACE glCullFace GL_DEPTH_TEST glDepthFunc, glDepthRange GL_DITHER glEnable GL_EDGE_FLAG_ARRAY glEdgeFlagPointer GL_FOG glFog GL_FOG_COORD_ARRAY glFogCoordPointer GL_HISTOGRAM glHistogram 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 GL_MAP1_INDEX glMap1 GL_MAP1_NORMAL glMap1 GL_MAP1_TEXTURE_COORD_1 glMap1 GL_MAP1_TEXTURE_COORD_2 glMap1 GL_MAP1_TEXTURE_COORD_3 glMap1 GL_MAP1_TEXTURE_COORD_4 glMap1 GL_MAP2_COLOR_4 glMap2 GL_MAP2_INDEX glMap2 GL_MAP2_NORMAL glMap2 GL_MAP2_TEXTURE_COORD_1 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 glMinmax GL_MULTISAMPLE glSampleCoverage GL_NORMAL_ARRAY glNormalPointer GL_NORMALIZE glNormal GL_POINT_SMOOTH glPointSize GL_POINT_SPRITE glEnable GL_POLYGON_SMOOTH glPolygonMode GL_POLYGON_OFFSET_FILL glPolygonOffset GL_POLYGON_OFFSET_LINE glPolygonOffset GL_POLYGON_OFFSET_POINT glPolygonOffset GL_POLYGON_STIPPLE glPolygonStipple GL_POST_COLOR_MATRIX_COLOR_TABLE glColorTable GL_POST_CONVOLUTION_COLOR_TABLE glColorTable GL_RESCALE_NORMAL glNormal GL_SAMPLE_ALPHA_TO_COVERAGE glSampleCoverage GL_SAMPLE_ALPHA_TO_ONE glSampleCoverage GL_SAMPLE_COVERAGE glSampleCoverage GL_SCISSOR_TEST glScissor GL_SECONDARY_COLOR_ARRAY glSecondaryColorPointer GL_SEPARABLE_2D glSeparableFilter2D GL_STENCIL_TEST glStencilFunc, glStencilOp GL_TEXTURE_1D glTexImage1D GL_TEXTURE_2D glTexImage2D GL_TEXTURE_3D glTexImage3D GL_TEXTURE_COORD_ARRAY glTexCoordPointer GL_TEXTURE_CUBE_MAP glTexImage2D 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_POINT_SIZE glEnable GL_VERTEX_PROGRAM_TWO_SIDE glEnable 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_FILL, GL_POLYGON_OFFSET_LINE, GL_POLYGON_OFFSET_POINT, GL_TEXTURE_COORD_ARRAY, and GL_VERTEX_ARRAY are available only if the GL version is 1.1 or greater. GL_RESCALE_NORMAL, and GL_TEXTURE_3D are available only if the GL version is 1.2 or greater. GL_MULTISAMPLE, GL_SAMPLE_ALPHA_TO_COVERAGE, GL_SAMPLE_ALPHA_TO_ONE, GL_SAMPLE_COVERAGE, GL_TEXTURE_CUBE_MAP are available only if the GL version is 1.3 or greater. GL_FOG_COORD_ARRAY and GL_SECONDARY_COLOR_ARRAY are available only if the GL version is 1.4 or greater. GL_POINT_SPRITE, GL_VERTEX_PROGRAM_POINT_SIZE, and GL_VERTEX_PROGRAM_TWO_SIDE are available only if the GL version is 2.0 or greater. GL_COLOR_TABLE, GL_CONVOLUTION_1D, GL_CONVOLUTION_2D, GL_HISTOGRAM, GL_MINMAX, GL_POST_COLOR_MATRIX_COLOR_TABLE, GL_POST_CONVOLUTION_COLOR_TABLE, and GL_SEPARABLE_2D are available only if ARB_imaging is returned when glGet is called with GL_EXTENSIONS. For OpenGL versions 1.3 and greater, or when the ARB_multitexture extension is supported, the following parameters return the associated value for the active texture unit: GL_TEXTURE_1D, GL_TEXTURE_2D, GL_TEXTURE_3D, GL_TEXTURE_CUBE_MAP, GL_TEXTURE_GEN_S, GL_TEXTURE_GEN_T, GL_TEXTURE_GEN_R, GL_TEXTURE_GEN_Q, GL_TEXTURE_MATRIX, and GL_TEXTURE_STACK_DEPTH. Likewise, the following parameters return the associated value for the active client texture unit: GL_TEXTURE_COORD_ARRAY, GL_TEXTURE_COORD_ARRAY_SIZE, GL_TEXTURE_COORD_ARRAY_STRIDE, GL_TEXTURE_COORD_ARRAY_TYPE. 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. glEnable, glEnableClientState, glGet Copyright 1991-2006 Silicon Graphics, Inc. This document is licensed under the SGI Free Software B License. For details, see http://oss.sgi.com/projects/FreeB/.