glIsEnabled : PyOpenGL 3.0.1b2 GL Man Pages

test whether a capability is enabled

Signature

glIsEnabled( GLenum ( cap ) )-> GLboolean

glIsEnabled( cap ) -> <class 'ctypes.c_ubyte'>

glIsEnabled( GLenum(cap) ) -> GLboolean

glIsEnabledi( target , index ) -> <class 'ctypes.c_ubyte'>

glIsEnabledi(GLenum(target), GLuint(index)) -> constants.GLboolean

Parameters

Variables	Description
cap	Specifies a symbolic constant indicating a GL capability.

Description

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_PLANE i	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_LIGHT i	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

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_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 .

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 .

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/ .

Sample Code References

The following code samples have been found which appear to reference the functions described here. Take care that the code may be old, broken or not even use PyOpenGL.

glIsEnabled

Glinter Core.py Lines: 207, 247