GLISENABLED

Section: Misc. Reference Manual Pages (3G)
Index Return to Main Contents
 

NAME

glIsEnabled - test whether a capability is enabled

 

C SPECIFICATION

GLboolean glIsEnabled( GLenum cap )


 

PARAMETERS

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:


ConstantSee

GL_ALPHA_TESTglAlphaFunc
GL_AUTO_NORMALglEvalCoord
GL_BLENDglBlendFunc, glLogicOp
GL_CLIP_PLANEiglClipPlane
GL_COLOR_ARRAYglColorPointer
GL_COLOR_LOGIC_OPglLogicOp
GL_COLOR_MATERIALglColorMaterial
GL_COLOR_TABLEglColorTable
GL_CONVOLUTION_1DglConvolutionFilter1D
GL_CONVOLUTION_2DglConvolutionFilter2D
GL_CULL_FACEglCullFace
GL_DEPTH_TESTglDepthFunc, glDepthRange
GL_DITHERglEnable
GL_EDGE_FLAG_ARRAYglEdgeFlagPointer
GL_FOGglFog
GL_HISTOGRAMglHistogram
GL_INDEX_ARRAYglIndexPointer
GL_INDEX_LOGIC_OPglLogicOp
GL_LIGHTiglLightModel, glLight
GL_LIGHTINGglMaterial, glLightModel, glLight
GL_LINE_SMOOTHglLineWidth
GL_LINE_STIPPLEglLineStipple
GL_MAP1_COLOR_4glMap1
GL_MAP1_INDEXglMap1
GL_MAP1_NORMALglMap1
GL_MAP1_TEXTURE_COORD_1glMap1
GL_MAP1_TEXTURE_COORD_2glMap1
GL_MAP1_TEXTURE_COORD_3glMap1
GL_MAP1_TEXTURE_COORD_4glMap1
GL_MAP2_COLOR_4glMap2
GL_MAP2_INDEXglMap2
GL_MAP2_NORMALglMap2
GL_MAP2_TEXTURE_COORD_1glMap2
GL_MAP2_TEXTURE_COORD_2glMap2
GL_MAP2_TEXTURE_COORD_3glMap2
GL_MAP2_TEXTURE_COORD_4glMap2
GL_MAP2_VERTEX_3glMap2
GL_MAP2_VERTEX_4glMap2
GL_MINMAXglMinmax
GL_NORMAL_ARRAYglNormalPointer
GL_NORMALIZEglNormal
GL_POINT_SMOOTHglPointSize
GL_POLYGON_SMOOTHglPolygonMode
GL_POLYGON_OFFSET_FILL glPolygonOffset
GL_POLYGON_OFFSET_LINE glPolygonOffset
GL_POLYGON_OFFSET_POINT glPolygonOffset
GL_POLYGON_STIPPLEglPolygonStipple
GL_POST_COLOR_MATRIX_COLOR_TABLEglColorTable
GL_POST_CONVOLUTION_COLOR_TABLEglColorTable
GL_RESCALE_NORMALglNormal
GL_SCISSOR_TESTglScissor
GL_SEPARABLE_2DglSeparableFilter2D
GL_STENCIL_TESTglStencilFunc, glStencilOp
GL_TEXTURE_1DglTexImage1D
GL_TEXTURE_2DglTexImage2D
GL_TEXTURE_3DglTexImage3D
GL_TEXTURE_COORD_ARRAYglTexCoordPointer
GL_TEXTURE_GEN_QglTexGen
GL_TEXTURE_GEN_RglTexGen
GL_TEXTURE_GEN_SglTexGen
GL_TEXTURE_GEN_TglTexGen
GL_VERTEX_ARRAYglVertexPointer

 

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_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.  

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(3G), glEnableClientState(3G), glGet(3G)


 

Index

NAME
C SPECIFICATION
PARAMETERS
DESCRIPTION
NOTES
ERRORS
SEE ALSO

linux.jgfs.net manual pages