'\" et '\"macro stdmacro .ds Vn Version 1.2 .ds Dt 24 September 1999 .ds Re Release 1.2.1 .ds Dp May 22 14:45 .ds Dm 9 May 22 14: .ds Xs 14538 7 .TH GLISENABLED 3G .SH NAME .B "glIsEnabled \- test whether a capability is enabled .SH C SPECIFICATION GLboolean \f3glIsEnabled\fP( GLenum \fIcap\fP ) .nf .fi .SH PARAMETERS .TP \w'\f2cap\fP\ \ 'u \f2cap\fP Specifies a symbolic constant indicating a GL capability. .SH DESCRIPTION \%\f3glIsEnabled\fP returns \%\f3GL_TRUE\fP if \f2cap\fP is an enabled capability and returns \%\f3GL_FALSE\fP otherwise. Initially all capabilities except \%\f3GL_DITHER\fP are disabled; \%\f3GL_DITHER\fP is initially enabled. .P The following capabilities are accepted for \f2cap\fP: .P .TS lb lb l l. _ Constant See _ \%\f3GL_ALPHA_TEST\fP \%\f3glAlphaFunc\fP \%\f3GL_AUTO_NORMAL\fP \%\f3glEvalCoord\fP \%\f3GL_BLEND\fP \%\f3glBlendFunc\fP, \%\f3glLogicOp\fP \%\f3GL_CLIP_PLANE\fP\f2i\fP \%\f3glClipPlane\fP \%\f3GL_COLOR_ARRAY\fP \%\f3glColorPointer\fP \%\f3GL_COLOR_LOGIC_OP\fP \%\f3glLogicOp\fP \%\f3GL_COLOR_MATERIAL\fP \%\f3glColorMaterial\fP \%\f3GL_COLOR_TABLE\fP \%\f3glColorTable\fP \%\f3GL_CONVOLUTION_1D\fP \%\f3glConvolutionFilter1D\fP \%\f3GL_CONVOLUTION_2D\fP \%\f3glConvolutionFilter2D\fP \%\f3GL_CULL_FACE\fP \%\f3glCullFace\fP \%\f3GL_DEPTH_TEST\fP \%\f3glDepthFunc\fP, \%\f3glDepthRange\fP \%\f3GL_DITHER\fP \%\f3glEnable\fP \%\f3GL_EDGE_FLAG_ARRAY\fP \%\f3glEdgeFlagPointer\fP \%\f3GL_FOG\fP \%\f3glFog\fP \%\f3GL_HISTOGRAM\fP \%\f3glHistogram\fP \%\f3GL_INDEX_ARRAY\fP \%\f3glIndexPointer\fP \%\f3GL_INDEX_LOGIC_OP\fP \%\f3glLogicOp\fP \%\f3GL_LIGHT\fP\f2i\fP \%\f3glLightModel\fP, \%\f3glLight\fP \%\f3GL_LIGHTING\fP \%\f3glMaterial\fP, \%\f3glLightModel\fP, \%\f3glLight\fP \%\f3GL_LINE_SMOOTH\fP \%\f3glLineWidth\fP \%\f3GL_LINE_STIPPLE\fP \%\f3glLineStipple\fP \%\f3GL_MAP1_COLOR_4\fP \%\f3glMap1\fP \%\f3GL_MAP1_INDEX\fP \%\f3glMap1\fP \%\f3GL_MAP1_NORMAL\fP \%\f3glMap1\fP \%\f3GL_MAP1_TEXTURE_COORD_1\fP \%\f3glMap1\fP \%\f3GL_MAP1_TEXTURE_COORD_2\fP \%\f3glMap1\fP \%\f3GL_MAP1_TEXTURE_COORD_3\fP \%\f3glMap1\fP \%\f3GL_MAP1_TEXTURE_COORD_4\fP \%\f3glMap1\fP \%\f3GL_MAP2_COLOR_4\fP \%\f3glMap2\fP \%\f3GL_MAP2_INDEX\fP \%\f3glMap2\fP \%\f3GL_MAP2_NORMAL\fP \%\f3glMap2\fP \%\f3GL_MAP2_TEXTURE_COORD_1\fP \%\f3glMap2\fP \%\f3GL_MAP2_TEXTURE_COORD_2\fP \%\f3glMap2\fP \%\f3GL_MAP2_TEXTURE_COORD_3\fP \%\f3glMap2\fP \%\f3GL_MAP2_TEXTURE_COORD_4\fP \%\f3glMap2\fP \%\f3GL_MAP2_VERTEX_3\fP \%\f3glMap2\fP \%\f3GL_MAP2_VERTEX_4\fP \%\f3glMap2\fP \%\f3GL_MINMAX\fP \%\f3glMinmax\fP \%\f3GL_NORMAL_ARRAY\fP \%\f3glNormalPointer\fP \%\f3GL_NORMALIZE\fP \%\f3glNormal\fP \%\f3GL_POINT_SMOOTH\fP \%\f3glPointSize\fP \%\f3GL_POLYGON_SMOOTH\fP \%\f3glPolygonMode\fP \%\f3GL_POLYGON_OFFSET_FILL\fP \%\f3glPolygonOffset\fP \%\f3GL_POLYGON_OFFSET_LINE\fP \%\f3glPolygonOffset\fP \%\f3GL_POLYGON_OFFSET_POINT\fP \%\f3glPolygonOffset\fP \%\f3GL_POLYGON_STIPPLE\fP \%\f3glPolygonStipple\fP \%\f3GL_POST_COLOR_MATRIX_COLOR_TABLE\fP \%\f3glColorTable\fP \%\f3GL_POST_CONVOLUTION_COLOR_TABLE\fP \%\f3glColorTable\fP \%\f3GL_RESCALE_NORMAL\fP \%\f3glNormal\fP \%\f3GL_SCISSOR_TEST\fP \%\f3glScissor\fP \%\f3GL_SEPARABLE_2D\fP \%\f3glSeparableFilter2D\fP \%\f3GL_STENCIL_TEST\fP \%\f3glStencilFunc\fP, \%\f3glStencilOp\fP \%\f3GL_TEXTURE_1D\fP \%\f3glTexImage1D\fP \%\f3GL_TEXTURE_2D\fP \%\f3glTexImage2D\fP \%\f3GL_TEXTURE_3D\fP \%\f3glTexImage3D\fP \%\f3GL_TEXTURE_COORD_ARRAY\fP \%\f3glTexCoordPointer\fP \%\f3GL_TEXTURE_GEN_Q\fP \%\f3glTexGen\fP \%\f3GL_TEXTURE_GEN_R\fP \%\f3glTexGen\fP \%\f3GL_TEXTURE_GEN_S\fP \%\f3glTexGen\fP \%\f3GL_TEXTURE_GEN_T\fP \%\f3glTexGen\fP \%\f3GL_VERTEX_ARRAY\fP \%\f3glVertexPointer\fP _ .TE .SH NOTES If an error is generated, \%\f3glIsEnabled\fP returns 0. .P \%\f3GL_COLOR_LOGIC_OP\fP, \%\f3GL_COLOR_ARRAY\fP, \%\f3GL_EDGE_FLAG_ARRAY\fP, \%\f3GL_INDEX_ARRAY\fP, \%\f3GL_INDEX_LOGIC_OP\fP, \%\f3GL_NORMAL_ARRAY\fP, \%\f3GL_POLYGON_OFFSET_FILL\fP, \%\f3GL_POLYGON_OFFSET_LINE\fP, \%\f3GL_POLYGON_OFFSET_POINT\fP, \%\f3GL_TEXTURE_COORD_ARRAY\fP, and \%\f3GL_VERTEX_ARRAY\fP are available only if the GL version is 1.1 or greater .P \%\f3GL_RESCALE_NORMAL\fP, and \%\f3GL_TEXTURE_3D\fP are available only if the GL version is 1.2 or greater. .P \%\f3GL_COLOR_TABLE\fP, \%\f3GL_CONVOLUTION_1D\fP, \%\f3GL_CONVOLUTION_2D\fP, \%\f3GL_HISTOGRAM\fP, \%\f3GL_MINMAX\fP, \%\f3GL_POST_COLOR_MATRIX_COLOR_TABLE\fP, \%\f3GL_POST_CONVOLUTION_COLOR_TABLE\fP, and \%\f3GL_SEPARABLE_2D\fP are available only if \%\f3GL_ARB_imaging\fP is returned when \%\f3glGet\fP is called with \%\f3GL_EXTENSIONS\fP. .P When the \%\f3GL_ARB_multitexture\fP extension is supported, the following parameters return the associated value for the active texture unit. \%\f3GL_TEXTURE_1D\fP, \%\f3GL_TEXTURE_BINDING_1D\fP, \%\f3GL_TEXTURE_2D\fP, \%\f3GL_TEXTURE_BINDING_2D\fP, \%\f3GL_TEXTURE_3D\fP, \%\f3GL_TEXTURE_BINDING_3D\fP, \%\f3GL_TEXTURE_GEN_S\fP, \%\f3GL_TEXTURE_GEN_T\fP, \%\f3GL_TEXTURE_GEN_R\fP, \%\f3GL_TEXTURE_GEN_Q\fP, \%\f3GL_TEXTURE_MATRIX\fP, and \%\f3GL_TEXTURE_STACK_DEPTH\fP. Likewise, the following parameters return the associated value for the active client texture unit: \%\f3GL_TEXTURE_COORD_ARRAY\fP, \%\f3GL_TEXTURE_COORD_ARRAY_SIZE\fP, \%\f3GL_TEXTURE_COORD_ARRAY_STRIDE\fP, \%\f3GL_TEXTURE_COORD_ARRAY_TYPE\fP. .SH ERRORS \%\f3GL_INVALID_ENUM\fP is generated if \f2cap\fP is not an accepted value. .P \%\f3GL_INVALID_OPERATION\fP is generated if \%\f3glIsEnabled\fP is executed between the execution of \%\f3glBegin\fP and the corresponding execution of \%\f3glEnd\fP. .SH SEE ALSO \%\f3glEnable\fP, \%\f3glEnableClientState\fP, \%\f3glGet\fP