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_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_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_NORMAL_ARRAY glNormalPointer |
| GL_NORMALIZE glNormal |
| GL_POINT_SMOOTH glPointSize |
| 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_SCISSOR_TEST glScissor |
| 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_GEN_Q glTexGen |
| GL_TEXTURE_GEN_R glTexGen |
| GL_TEXTURE_GEN_S glTexGen |
| GL_TEXTURE_GEN_T glTexGen |
| GL_VERTEX_ARRAY glVertexPointer |
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_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 GL_ARB_imaging is returned when glGet is called with GL_EXTENSIONS.
When the GL_ARB_multitexture extension is supported, the following parameters return the associated value for the active texture unit. GL_TEXTURE_1D, GL_TEXTURE_BINDING_1D, GL_TEXTURE_2D, GL_TEXTURE_BINDING_2D, GL_TEXTURE_3D, GL_TEXTURE_BINDING_3D, 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_OPERATION is generated if glIsEnabled is executed between the execution of glBegin and the corresponding execution of glEnd.