1GLISENABLED(3G)                                                GLISENABLED(3G)
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NAME

6       glIsEnabled - test whether a capability is enabled
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C SPECIFICATION

10       GLboolean glIsEnabled( GLenum cap )
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PARAMETERS

14       cap  Specifies a symbolic constant indicating a GL capability.
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DESCRIPTION

17       glIsEnabled returns GL_TRUE if cap is an enabled capability and returns
18       GL_FALSE otherwise.  Initially all capabilities  except  GL_DITHER  are
19       disabled; GL_DITHER is initially enabled.
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21       The following capabilities are accepted for cap:
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23       ─────────────────────────────────────────────────────────────────────
24       Constant                           See
25       ─────────────────────────────────────────────────────────────────────
26       GL_ALPHA_TEST                      glAlphaFunc
27       GL_AUTO_NORMAL                     glEvalCoord
28       GL_BLEND                           glBlendFunc, glLogicOp
29       GL_CLIP_PLANEi                     glClipPlane
30       GL_COLOR_ARRAY                     glColorPointer
31       GL_COLOR_LOGIC_OP                  glLogicOp
32       GL_COLOR_MATERIAL                  glColorMaterial
33       GL_COLOR_TABLE                     glColorTable
34       GL_CONVOLUTION_1D                  glConvolutionFilter1D
35       GL_CONVOLUTION_2D                  glConvolutionFilter2D
36       GL_CULL_FACE                       glCullFace
37       GL_DEPTH_TEST                      glDepthFunc, glDepthRange
38       GL_DITHER                          glEnable
39       GL_EDGE_FLAG_ARRAY                 glEdgeFlagPointer
40       GL_FOG                             glFog
41       GL_HISTOGRAM                       glHistogram
42       GL_INDEX_ARRAY                     glIndexPointer
43       GL_INDEX_LOGIC_OP                  glLogicOp
44       GL_LIGHTi                          glLightModel, glLight
45       GL_LIGHTING                        glMaterial, glLightModel, glLight
46       GL_LINE_SMOOTH                     glLineWidth
47       GL_LINE_STIPPLE                    glLineStipple
48       GL_MAP1_COLOR_4                    glMap1
49       GL_MAP1_INDEX                      glMap1
50       GL_MAP1_NORMAL                     glMap1
51       GL_MAP1_TEXTURE_COORD_1            glMap1
52       GL_MAP1_TEXTURE_COORD_2            glMap1
53       GL_MAP1_TEXTURE_COORD_3            glMap1
54       GL_MAP1_TEXTURE_COORD_4            glMap1
55       GL_MAP2_COLOR_4                    glMap2
56       GL_MAP2_INDEX                      glMap2
57       GL_MAP2_NORMAL                     glMap2
58       GL_MAP2_TEXTURE_COORD_1            glMap2
59       GL_MAP2_TEXTURE_COORD_2            glMap2
60       GL_MAP2_TEXTURE_COORD_3            glMap2
61       GL_MAP2_TEXTURE_COORD_4            glMap2
62       GL_MAP2_VERTEX_3                   glMap2
63       GL_MAP2_VERTEX_4                   glMap2
64       GL_MINMAX                          glMinmax
65       GL_NORMAL_ARRAY                    glNormalPointer
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67       GL_NORMALIZE                       glNormal
68       GL_POINT_SMOOTH                    glPointSize
69       GL_POLYGON_SMOOTH                  glPolygonMode
70       GL_POLYGON_OFFSET_FILL             glPolygonOffset
71       GL_POLYGON_OFFSET_LINE             glPolygonOffset
72       GL_POLYGON_OFFSET_POINT            glPolygonOffset
73       GL_POLYGON_STIPPLE                 glPolygonStipple
74       GL_POST_COLOR_MATRIX_COLOR_TABLE   glColorTable
75       GL_POST_CONVOLUTION_COLOR_TABLE    glColorTable
76       GL_RESCALE_NORMAL                  glNormal
77       GL_SCISSOR_TEST                    glScissor
78       GL_SEPARABLE_2D                    glSeparableFilter2D
79       GL_STENCIL_TEST                    glStencilFunc, glStencilOp
80       GL_TEXTURE_1D                      glTexImage1D
81       GL_TEXTURE_2D                      glTexImage2D
82       GL_TEXTURE_3D                      glTexImage3D
83       GL_TEXTURE_COORD_ARRAY             glTexCoordPointer
84       GL_TEXTURE_GEN_Q                   glTexGen
85       GL_TEXTURE_GEN_R                   glTexGen
86       GL_TEXTURE_GEN_S                   glTexGen
87       GL_TEXTURE_GEN_T                   glTexGen
88       GL_VERTEX_ARRAY                    glVertexPointer
89       ─────────────────────────────────────────────────────────────────────
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NOTES

93       If an error is generated, glIsEnabled returns 0.
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95       GL_COLOR_LOGIC_OP,  GL_COLOR_ARRAY, GL_EDGE_FLAG_ARRAY, GL_INDEX_ARRAY,
96       GL_INDEX_LOGIC_OP,       GL_NORMAL_ARRAY,       GL_POLYGON_OFFSET_FILL,
97       GL_POLYGON_OFFSET_LINE,                        GL_POLYGON_OFFSET_POINT,
98       GL_TEXTURE_COORD_ARRAY, and GL_VERTEX_ARRAY are available only  if  the
99       GL version is 1.1 or greater
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101       GL_RESCALE_NORMAL,  and GL_TEXTURE_3D are available only if the GL ver‐
102       sion is 1.2 or greater.
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104       GL_COLOR_TABLE,  GL_CONVOLUTION_1D,  GL_CONVOLUTION_2D,   GL_HISTOGRAM,
105       GL_MINMAX,                            GL_POST_COLOR_MATRIX_COLOR_TABLE,
106       GL_POST_CONVOLUTION_COLOR_TABLE, and GL_SEPARABLE_2D are available only
107       if GL_ARB_imaging is returned when glGet is called with GL_EXTENSIONS.
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109       When  the  GL_ARB_multitexture  extension  is  supported, the following
110       parameters return the associated value for  the  active  texture  unit.
111       GL_TEXTURE_1D,           GL_TEXTURE_BINDING_1D,          GL_TEXTURE_2D,
112       GL_TEXTURE_BINDING_2D,      GL_TEXTURE_3D,       GL_TEXTURE_BINDING_3D,
113       GL_TEXTURE_GEN_S, GL_TEXTURE_GEN_T, GL_TEXTURE_GEN_R, GL_TEXTURE_GEN_Q,
114       GL_TEXTURE_MATRIX, and GL_TEXTURE_STACK_DEPTH.  Likewise, the following
115       parameters  return  the  associated value for the active client texture
116       unit:       GL_TEXTURE_COORD_ARRAY,        GL_TEXTURE_COORD_ARRAY_SIZE,
117       GL_TEXTURE_COORD_ARRAY_STRIDE, GL_TEXTURE_COORD_ARRAY_TYPE.
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ERRORS

120       GL_INVALID_ENUM is generated if cap is not an accepted value.
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122       GL_INVALID_OPERATION  is  generated  if glIsEnabled is executed between
123       the execution of glBegin and the corresponding execution of glEnd.
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SEE ALSO

126       glEnable(3G), glEnableClientState(3G), glGet(3G)
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131                                                               GLISENABLED(3G)