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renderer=
"mathplayer-dl"><head><meta http-equiv=
"Content-Type" content=
"text/html; charset=UTF-8" /><title>glIsEnabled
</title><meta name=
"generator" content=
"DocBook XSL Stylesheets V1.73.2" /></head><body><div class=
"refentry" lang=
"en" xml:
lang=
"en"><a id=
"glIsEnabled"></a><div class=
"titlepage"></div><div class=
"refnamediv"><h2>Name
</h2><p>glIsEnabled — test whether a capability is enabled
</p></div><div class=
"refsynopsisdiv"><h2>C Specification
</h2><div class=
"funcsynopsis"><table border=
"0" summary=
"Function synopsis" cellspacing=
"0" cellpadding=
"0"><tr><td><code class=
"funcdef">GLboolean
<b class=
"fsfunc">glIsEnabled
</b>(
</code></td><td>GLenum
</td><td><var class=
"pdparam">cap
</var><code>)
</code>;
</td></tr></table></div></div><div class=
"refsect1" lang=
"en" xml:
lang=
"en"><a id=
"parameters"></a><h2>Parameters
</h2><div class=
"variablelist"><dl><dt><span class=
"term"><em class=
"parameter"><code>cap
</code></em></span></dt><dd><p>
4 Specifies a symbolic constant indicating a GL capability.
5 </p></dd></dl></div></div><div class=
"refsect1" lang=
"en" xml:
lang=
"en"><a id=
"description"></a><h2>Description
</h2><p>
6 <code class=
"function">glIsEnabled
</code> returns
<code class=
"constant">GL_TRUE
</code> if
<em class=
"parameter"><code>cap
</code></em> is an enabled capability
7 and returns
<code class=
"constant">GL_FALSE
</code> otherwise.
8 Initially all capabilities except
<code class=
"constant">GL_DITHER
</code> are disabled;
9 <code class=
"constant">GL_DITHER
</code> is initially enabled.
11 The following capabilities are accepted for
<em class=
"parameter"><code>cap
</code></em>:
13 </p><div class=
"informaltable"><table border=
"1"><colgroup><col align=
"left" /><col align=
"left" /></colgroup><thead><tr><th align=
"left"><span class=
"bold"><strong>
15 </strong></span></th><th align=
"left"><span class=
"bold"><strong>
17 </strong></span></th></tr></thead><tbody><tr><td align=
"left">
18 <code class=
"constant">GL_ALPHA_TEST
</code>
19 </td><td align=
"left">
20 <a class=
"citerefentry" href=
"glAlphaFunc.xml"><span class=
"citerefentry"><span class=
"refentrytitle">glAlphaFunc
</span></span></a>
21 </td></tr><tr><td align=
"left">
22 <code class=
"constant">GL_AUTO_NORMAL
</code>
23 </td><td align=
"left">
24 <a class=
"citerefentry" href=
"glEvalCoord.xml"><span class=
"citerefentry"><span class=
"refentrytitle">glEvalCoord
</span></span></a>
25 </td></tr><tr><td align=
"left">
26 <code class=
"constant">GL_BLEND
</code>
27 </td><td align=
"left">
28 <a class=
"citerefentry" href=
"glBlendFunc.xml"><span class=
"citerefentry"><span class=
"refentrytitle">glBlendFunc
</span></span></a>,
<a class=
"citerefentry" href=
"glLogicOp.xml"><span class=
"citerefentry"><span class=
"refentrytitle">glLogicOp
</span></span></a>
29 </td></tr><tr><td align=
"left">
30 <code class=
"constant">GL_CLIP_PLANE
</code><span class=
"emphasis"><em>i
</em></span>
31 </td><td align=
"left">
32 <a class=
"citerefentry" href=
"glClipPlane.xml"><span class=
"citerefentry"><span class=
"refentrytitle">glClipPlane
</span></span></a>
33 </td></tr><tr><td align=
"left">
34 <code class=
"constant">GL_COLOR_ARRAY
</code>
35 </td><td align=
"left">
36 <a class=
"citerefentry" href=
"glColorPointer.xml"><span class=
"citerefentry"><span class=
"refentrytitle">glColorPointer
</span></span></a>
37 </td></tr><tr><td align=
"left">
38 <code class=
"constant">GL_COLOR_LOGIC_OP
</code>
39 </td><td align=
"left">
40 <a class=
"citerefentry" href=
"glLogicOp.xml"><span class=
"citerefentry"><span class=
"refentrytitle">glLogicOp
</span></span></a>
41 </td></tr><tr><td align=
"left">
42 <code class=
"constant">GL_COLOR_MATERIAL
</code>
43 </td><td align=
"left">
44 <a class=
"citerefentry" href=
"glColorMaterial.xml"><span class=
"citerefentry"><span class=
"refentrytitle">glColorMaterial
</span></span></a>
45 </td></tr><tr><td align=
"left">
46 <code class=
"constant">GL_COLOR_SUM
</code>
47 </td><td align=
"left">
48 <a class=
"citerefentry" href=
"glSecondaryColor.xml"><span class=
"citerefentry"><span class=
"refentrytitle">glSecondaryColor
</span></span></a>
49 </td></tr><tr><td align=
"left">
50 <code class=
"constant">GL_COLOR_TABLE
</code>
51 </td><td align=
"left">
52 <a class=
"citerefentry" href=
"glColorTable.xml"><span class=
"citerefentry"><span class=
"refentrytitle">glColorTable
</span></span></a>
53 </td></tr><tr><td align=
"left">
54 <code class=
"constant">GL_CONVOLUTION_1D
</code>
55 </td><td align=
"left">
56 <a class=
"citerefentry" href=
"glConvolutionFilter1D.xml"><span class=
"citerefentry"><span class=
"refentrytitle">glConvolutionFilter1D
</span></span></a>
57 </td></tr><tr><td align=
"left">
58 <code class=
"constant">GL_CONVOLUTION_2D
</code>
59 </td><td align=
"left">
60 <a class=
"citerefentry" href=
"glConvolutionFilter2D.xml"><span class=
"citerefentry"><span class=
"refentrytitle">glConvolutionFilter2D
</span></span></a>
61 </td></tr><tr><td align=
"left">
62 <code class=
"constant">GL_CULL_FACE
</code>
63 </td><td align=
"left">
64 <a class=
"citerefentry" href=
"glCullFace.xml"><span class=
"citerefentry"><span class=
"refentrytitle">glCullFace
</span></span></a>
65 </td></tr><tr><td align=
"left">
66 <code class=
"constant">GL_DEPTH_TEST
</code>
67 </td><td align=
"left">
68 <a class=
"citerefentry" href=
"glDepthFunc.xml"><span class=
"citerefentry"><span class=
"refentrytitle">glDepthFunc
</span></span></a>,
<a class=
"citerefentry" href=
"glDepthRange.xml"><span class=
"citerefentry"><span class=
"refentrytitle">glDepthRange
</span></span></a>
69 </td></tr><tr><td align=
"left">
70 <code class=
"constant">GL_DITHER
</code>
71 </td><td align=
"left">
72 <a class=
"citerefentry" href=
"glEnable.xml"><span class=
"citerefentry"><span class=
"refentrytitle">glEnable
</span></span></a>
73 </td></tr><tr><td align=
"left">
74 <code class=
"constant">GL_EDGE_FLAG_ARRAY
</code>
75 </td><td align=
"left">
76 <a class=
"citerefentry" href=
"glEdgeFlagPointer.xml"><span class=
"citerefentry"><span class=
"refentrytitle">glEdgeFlagPointer
</span></span></a>
77 </td></tr><tr><td align=
"left">
78 <code class=
"constant">GL_FOG
</code>
79 </td><td align=
"left">
80 <a class=
"citerefentry" href=
"glFog.xml"><span class=
"citerefentry"><span class=
"refentrytitle">glFog
</span></span></a>
81 </td></tr><tr><td align=
"left">
82 <code class=
"constant">GL_FOG_COORD_ARRAY
</code>
83 </td><td align=
"left">
84 <a class=
"citerefentry" href=
"glFogCoordPointer.xml"><span class=
"citerefentry"><span class=
"refentrytitle">glFogCoordPointer
</span></span></a>
85 </td></tr><tr><td align=
"left">
86 <code class=
"constant">GL_HISTOGRAM
</code>
87 </td><td align=
"left">
88 <a class=
"citerefentry" href=
"glHistogram.xml"><span class=
"citerefentry"><span class=
"refentrytitle">glHistogram
</span></span></a>
89 </td></tr><tr><td align=
"left">
90 <code class=
"constant">GL_INDEX_ARRAY
</code>
91 </td><td align=
"left">
92 <a class=
"citerefentry" href=
"glIndexPointer.xml"><span class=
"citerefentry"><span class=
"refentrytitle">glIndexPointer
</span></span></a>
93 </td></tr><tr><td align=
"left">
94 <code class=
"constant">GL_INDEX_LOGIC_OP
</code>
95 </td><td align=
"left">
96 <a class=
"citerefentry" href=
"glLogicOp.xml"><span class=
"citerefentry"><span class=
"refentrytitle">glLogicOp
</span></span></a>
97 </td></tr><tr><td align=
"left">
98 <code class=
"constant">GL_LIGHT
</code><span class=
"emphasis"><em>i
</em></span>
99 </td><td align=
"left">
100 <a class=
"citerefentry" href=
"glLightModel.xml"><span class=
"citerefentry"><span class=
"refentrytitle">glLightModel
</span></span></a>,
<a class=
"citerefentry" href=
"glLight.xml"><span class=
"citerefentry"><span class=
"refentrytitle">glLight
</span></span></a>
101 </td></tr><tr><td align=
"left">
102 <code class=
"constant">GL_LIGHTING
</code>
103 </td><td align=
"left">
104 <a class=
"citerefentry" href=
"glMaterial.xml"><span class=
"citerefentry"><span class=
"refentrytitle">glMaterial
</span></span></a>,
<a class=
"citerefentry" href=
"glLightModel.xml"><span class=
"citerefentry"><span class=
"refentrytitle">glLightModel
</span></span></a>,
<a class=
"citerefentry" href=
"glLight.xml"><span class=
"citerefentry"><span class=
"refentrytitle">glLight
</span></span></a>
105 </td></tr><tr><td align=
"left">
106 <code class=
"constant">GL_LINE_SMOOTH
</code>
107 </td><td align=
"left">
108 <a class=
"citerefentry" href=
"glLineWidth.xml"><span class=
"citerefentry"><span class=
"refentrytitle">glLineWidth
</span></span></a>
109 </td></tr><tr><td align=
"left">
110 <code class=
"constant">GL_LINE_STIPPLE
</code>
111 </td><td align=
"left">
112 <a class=
"citerefentry" href=
"glLineStipple.xml"><span class=
"citerefentry"><span class=
"refentrytitle">glLineStipple
</span></span></a>
113 </td></tr><tr><td align=
"left">
114 <code class=
"constant">GL_MAP1_COLOR_4
</code>
115 </td><td align=
"left">
116 <a class=
"citerefentry" href=
"glMap1.xml"><span class=
"citerefentry"><span class=
"refentrytitle">glMap1
</span></span></a>
117 </td></tr><tr><td align=
"left">
118 <code class=
"constant">GL_MAP1_INDEX
</code>
119 </td><td align=
"left">
120 <a class=
"citerefentry" href=
"glMap1.xml"><span class=
"citerefentry"><span class=
"refentrytitle">glMap1
</span></span></a>
121 </td></tr><tr><td align=
"left">
122 <code class=
"constant">GL_MAP1_NORMAL
</code>
123 </td><td align=
"left">
124 <a class=
"citerefentry" href=
"glMap1.xml"><span class=
"citerefentry"><span class=
"refentrytitle">glMap1
</span></span></a>
125 </td></tr><tr><td align=
"left">
126 <code class=
"constant">GL_MAP1_TEXTURE_COORD_1
</code>
127 </td><td align=
"left">
128 <a class=
"citerefentry" href=
"glMap1.xml"><span class=
"citerefentry"><span class=
"refentrytitle">glMap1
</span></span></a>
129 </td></tr><tr><td align=
"left">
130 <code class=
"constant">GL_MAP1_TEXTURE_COORD_2
</code>
131 </td><td align=
"left">
132 <a class=
"citerefentry" href=
"glMap1.xml"><span class=
"citerefentry"><span class=
"refentrytitle">glMap1
</span></span></a>
133 </td></tr><tr><td align=
"left">
134 <code class=
"constant">GL_MAP1_TEXTURE_COORD_3
</code>
135 </td><td align=
"left">
136 <a class=
"citerefentry" href=
"glMap1.xml"><span class=
"citerefentry"><span class=
"refentrytitle">glMap1
</span></span></a>
137 </td></tr><tr><td align=
"left">
138 <code class=
"constant">GL_MAP1_TEXTURE_COORD_4
</code>
139 </td><td align=
"left">
140 <a class=
"citerefentry" href=
"glMap1.xml"><span class=
"citerefentry"><span class=
"refentrytitle">glMap1
</span></span></a>
141 </td></tr><tr><td align=
"left">
142 <code class=
"constant">GL_MAP2_COLOR_4
</code>
143 </td><td align=
"left">
144 <a class=
"citerefentry" href=
"glMap2.xml"><span class=
"citerefentry"><span class=
"refentrytitle">glMap2
</span></span></a>
145 </td></tr><tr><td align=
"left">
146 <code class=
"constant">GL_MAP2_INDEX
</code>
147 </td><td align=
"left">
148 <a class=
"citerefentry" href=
"glMap2.xml"><span class=
"citerefentry"><span class=
"refentrytitle">glMap2
</span></span></a>
149 </td></tr><tr><td align=
"left">
150 <code class=
"constant">GL_MAP2_NORMAL
</code>
151 </td><td align=
"left">
152 <a class=
"citerefentry" href=
"glMap2.xml"><span class=
"citerefentry"><span class=
"refentrytitle">glMap2
</span></span></a>
153 </td></tr><tr><td align=
"left">
154 <code class=
"constant">GL_MAP2_TEXTURE_COORD_1
</code>
155 </td><td align=
"left">
156 <a class=
"citerefentry" href=
"glMap2.xml"><span class=
"citerefentry"><span class=
"refentrytitle">glMap2
</span></span></a>
157 </td></tr><tr><td align=
"left">
158 <code class=
"constant">GL_MAP2_TEXTURE_COORD_2
</code>
159 </td><td align=
"left">
160 <a class=
"citerefentry" href=
"glMap2.xml"><span class=
"citerefentry"><span class=
"refentrytitle">glMap2
</span></span></a>
161 </td></tr><tr><td align=
"left">
162 <code class=
"constant">GL_MAP2_TEXTURE_COORD_3
</code>
163 </td><td align=
"left">
164 <a class=
"citerefentry" href=
"glMap2.xml"><span class=
"citerefentry"><span class=
"refentrytitle">glMap2
</span></span></a>
165 </td></tr><tr><td align=
"left">
166 <code class=
"constant">GL_MAP2_TEXTURE_COORD_4
</code>
167 </td><td align=
"left">
168 <a class=
"citerefentry" href=
"glMap2.xml"><span class=
"citerefentry"><span class=
"refentrytitle">glMap2
</span></span></a>
169 </td></tr><tr><td align=
"left">
170 <code class=
"constant">GL_MAP2_VERTEX_3
</code>
171 </td><td align=
"left">
172 <a class=
"citerefentry" href=
"glMap2.xml"><span class=
"citerefentry"><span class=
"refentrytitle">glMap2
</span></span></a>
173 </td></tr><tr><td align=
"left">
174 <code class=
"constant">GL_MAP2_VERTEX_4
</code>
175 </td><td align=
"left">
176 <a class=
"citerefentry" href=
"glMap2.xml"><span class=
"citerefentry"><span class=
"refentrytitle">glMap2
</span></span></a>
177 </td></tr><tr><td align=
"left">
178 <code class=
"constant">GL_MINMAX
</code>
179 </td><td align=
"left">
180 <a class=
"citerefentry" href=
"glMinmax.xml"><span class=
"citerefentry"><span class=
"refentrytitle">glMinmax
</span></span></a>
181 </td></tr><tr><td align=
"left">
182 <code class=
"constant">GL_MULTISAMPLE
</code>
183 </td><td align=
"left">
184 <a class=
"citerefentry" href=
"glSampleCoverage.xml"><span class=
"citerefentry"><span class=
"refentrytitle">glSampleCoverage
</span></span></a>
185 </td></tr><tr><td align=
"left">
186 <code class=
"constant">GL_NORMAL_ARRAY
</code>
187 </td><td align=
"left">
188 <a class=
"citerefentry" href=
"glNormalPointer.xml"><span class=
"citerefentry"><span class=
"refentrytitle">glNormalPointer
</span></span></a>
189 </td></tr><tr><td align=
"left">
190 <code class=
"constant">GL_NORMALIZE
</code>
191 </td><td align=
"left">
192 <a class=
"citerefentry" href=
"glNormal.xml"><span class=
"citerefentry"><span class=
"refentrytitle">glNormal
</span></span></a>
193 </td></tr><tr><td align=
"left">
194 <code class=
"constant">GL_POINT_SMOOTH
</code>
195 </td><td align=
"left">
196 <a class=
"citerefentry" href=
"glPointSize.xml"><span class=
"citerefentry"><span class=
"refentrytitle">glPointSize
</span></span></a>
197 </td></tr><tr><td align=
"left">
198 <code class=
"constant">GL_POINT_SPRITE
</code>
199 </td><td align=
"left">
200 <a class=
"citerefentry" href=
"glEnable.xml"><span class=
"citerefentry"><span class=
"refentrytitle">glEnable
</span></span></a>
201 </td></tr><tr><td align=
"left">
202 <code class=
"constant">GL_POLYGON_SMOOTH
</code>
203 </td><td align=
"left">
204 <a class=
"citerefentry" href=
"glPolygonMode.xml"><span class=
"citerefentry"><span class=
"refentrytitle">glPolygonMode
</span></span></a>
205 </td></tr><tr><td align=
"left">
206 <code class=
"constant">GL_POLYGON_OFFSET_FILL
</code>
207 </td><td align=
"left">
208 <a class=
"citerefentry" href=
"glPolygonOffset.xml"><span class=
"citerefentry"><span class=
"refentrytitle">glPolygonOffset
</span></span></a>
209 </td></tr><tr><td align=
"left">
210 <code class=
"constant">GL_POLYGON_OFFSET_LINE
</code>
211 </td><td align=
"left">
212 <a class=
"citerefentry" href=
"glPolygonOffset.xml"><span class=
"citerefentry"><span class=
"refentrytitle">glPolygonOffset
</span></span></a>
213 </td></tr><tr><td align=
"left">
214 <code class=
"constant">GL_POLYGON_OFFSET_POINT
</code>
215 </td><td align=
"left">
216 <a class=
"citerefentry" href=
"glPolygonOffset.xml"><span class=
"citerefentry"><span class=
"refentrytitle">glPolygonOffset
</span></span></a>
217 </td></tr><tr><td align=
"left">
218 <code class=
"constant">GL_POLYGON_STIPPLE
</code>
219 </td><td align=
"left">
220 <a class=
"citerefentry" href=
"glPolygonStipple.xml"><span class=
"citerefentry"><span class=
"refentrytitle">glPolygonStipple
</span></span></a>
221 </td></tr><tr><td align=
"left">
222 <code class=
"constant">GL_POST_COLOR_MATRIX_COLOR_TABLE
</code>
223 </td><td align=
"left">
224 <a class=
"citerefentry" href=
"glColorTable.xml"><span class=
"citerefentry"><span class=
"refentrytitle">glColorTable
</span></span></a>
225 </td></tr><tr><td align=
"left">
226 <code class=
"constant">GL_POST_CONVOLUTION_COLOR_TABLE
</code>
227 </td><td align=
"left">
228 <a class=
"citerefentry" href=
"glColorTable.xml"><span class=
"citerefentry"><span class=
"refentrytitle">glColorTable
</span></span></a>
229 </td></tr><tr><td align=
"left">
230 <code class=
"constant">GL_RESCALE_NORMAL
</code>
231 </td><td align=
"left">
232 <a class=
"citerefentry" href=
"glNormal.xml"><span class=
"citerefentry"><span class=
"refentrytitle">glNormal
</span></span></a>
233 </td></tr><tr><td align=
"left">
234 <code class=
"constant">GL_SAMPLE_ALPHA_TO_COVERAGE
</code>
235 </td><td align=
"left">
236 <a class=
"citerefentry" href=
"glSampleCoverage.xml"><span class=
"citerefentry"><span class=
"refentrytitle">glSampleCoverage
</span></span></a>
237 </td></tr><tr><td align=
"left">
238 <code class=
"constant">GL_SAMPLE_ALPHA_TO_ONE
</code>
239 </td><td align=
"left">
240 <a class=
"citerefentry" href=
"glSampleCoverage.xml"><span class=
"citerefentry"><span class=
"refentrytitle">glSampleCoverage
</span></span></a>
241 </td></tr><tr><td align=
"left">
242 <code class=
"constant">GL_SAMPLE_COVERAGE
</code>
243 </td><td align=
"left">
244 <a class=
"citerefentry" href=
"glSampleCoverage.xml"><span class=
"citerefentry"><span class=
"refentrytitle">glSampleCoverage
</span></span></a>
245 </td></tr><tr><td align=
"left">
246 <code class=
"constant">GL_SCISSOR_TEST
</code>
247 </td><td align=
"left">
248 <a class=
"citerefentry" href=
"glScissor.xml"><span class=
"citerefentry"><span class=
"refentrytitle">glScissor
</span></span></a>
249 </td></tr><tr><td align=
"left">
250 <code class=
"constant">GL_SECONDARY_COLOR_ARRAY
</code>
251 </td><td align=
"left">
252 <a class=
"citerefentry" href=
"glSecondaryColorPointer.xml"><span class=
"citerefentry"><span class=
"refentrytitle">glSecondaryColorPointer
</span></span></a>
253 </td></tr><tr><td align=
"left">
254 <code class=
"constant">GL_SEPARABLE_2D
</code>
255 </td><td align=
"left">
256 <a class=
"citerefentry" href=
"glSeparableFilter2D.xml"><span class=
"citerefentry"><span class=
"refentrytitle">glSeparableFilter2D
</span></span></a>
257 </td></tr><tr><td align=
"left">
258 <code class=
"constant">GL_STENCIL_TEST
</code>
259 </td><td align=
"left">
260 <a class=
"citerefentry" href=
"glStencilFunc.xml"><span class=
"citerefentry"><span class=
"refentrytitle">glStencilFunc
</span></span></a>,
<a class=
"citerefentry" href=
"glStencilOp.xml"><span class=
"citerefentry"><span class=
"refentrytitle">glStencilOp
</span></span></a>
261 </td></tr><tr><td align=
"left">
262 <code class=
"constant">GL_TEXTURE_1D
</code>
263 </td><td align=
"left">
264 <a class=
"citerefentry" href=
"glTexImage1D.xml"><span class=
"citerefentry"><span class=
"refentrytitle">glTexImage1D
</span></span></a>
265 </td></tr><tr><td align=
"left">
266 <code class=
"constant">GL_TEXTURE_2D
</code>
267 </td><td align=
"left">
268 <a class=
"citerefentry" href=
"glTexImage2D.xml"><span class=
"citerefentry"><span class=
"refentrytitle">glTexImage2D
</span></span></a>
269 </td></tr><tr><td align=
"left">
270 <code class=
"constant">GL_TEXTURE_3D
</code>
271 </td><td align=
"left">
272 <a class=
"citerefentry" href=
"glTexImage3D.xml"><span class=
"citerefentry"><span class=
"refentrytitle">glTexImage3D
</span></span></a>
273 </td></tr><tr><td align=
"left">
274 <code class=
"constant">GL_TEXTURE_COORD_ARRAY
</code>
275 </td><td align=
"left">
276 <a class=
"citerefentry" href=
"glTexCoordPointer.xml"><span class=
"citerefentry"><span class=
"refentrytitle">glTexCoordPointer
</span></span></a>
277 </td></tr><tr><td align=
"left">
278 <code class=
"constant">GL_TEXTURE_CUBE_MAP
</code>
279 </td><td align=
"left">
280 <a class=
"citerefentry" href=
"glTexImage2D.xml"><span class=
"citerefentry"><span class=
"refentrytitle">glTexImage2D
</span></span></a>
281 </td></tr><tr><td align=
"left">
282 <code class=
"constant">GL_TEXTURE_GEN_Q
</code>
283 </td><td align=
"left">
284 <a class=
"citerefentry" href=
"glTexGen.xml"><span class=
"citerefentry"><span class=
"refentrytitle">glTexGen
</span></span></a>
285 </td></tr><tr><td align=
"left">
286 <code class=
"constant">GL_TEXTURE_GEN_R
</code>
287 </td><td align=
"left">
288 <a class=
"citerefentry" href=
"glTexGen.xml"><span class=
"citerefentry"><span class=
"refentrytitle">glTexGen
</span></span></a>
289 </td></tr><tr><td align=
"left">
290 <code class=
"constant">GL_TEXTURE_GEN_S
</code>
291 </td><td align=
"left">
292 <a class=
"citerefentry" href=
"glTexGen.xml"><span class=
"citerefentry"><span class=
"refentrytitle">glTexGen
</span></span></a>
293 </td></tr><tr><td align=
"left">
294 <code class=
"constant">GL_TEXTURE_GEN_T
</code>
295 </td><td align=
"left">
296 <a class=
"citerefentry" href=
"glTexGen.xml"><span class=
"citerefentry"><span class=
"refentrytitle">glTexGen
</span></span></a>
297 </td></tr><tr><td align=
"left">
298 <code class=
"constant">GL_VERTEX_ARRAY
</code>
299 </td><td align=
"left">
300 <a class=
"citerefentry" href=
"glVertexPointer.xml"><span class=
"citerefentry"><span class=
"refentrytitle">glVertexPointer
</span></span></a>
301 </td></tr><tr><td align=
"left">
302 <code class=
"constant">GL_VERTEX_PROGRAM_POINT_SIZE
</code>
303 </td><td align=
"left">
304 <a class=
"citerefentry" href=
"glEnable.xml"><span class=
"citerefentry"><span class=
"refentrytitle">glEnable
</span></span></a>
305 </td></tr><tr><td align=
"left">
306 <code class=
"constant">GL_VERTEX_PROGRAM_TWO_SIDE
</code>
307 </td><td align=
"left">
308 <a class=
"citerefentry" href=
"glEnable.xml"><span class=
"citerefentry"><span class=
"refentrytitle">glEnable
</span></span></a>
309 </td></tr></tbody></table></div><p>
310 </p></div><div class=
"refsect1" lang=
"en" xml:
lang=
"en"><a id=
"notes"></a><h2>Notes
</h2><p>
311 If an error is generated,
312 <code class=
"function">glIsEnabled
</code> returns
0.
314 <code class=
"constant">GL_COLOR_LOGIC_OP
</code>,
315 <code class=
"constant">GL_COLOR_ARRAY
</code>,
316 <code class=
"constant">GL_EDGE_FLAG_ARRAY
</code>,
317 <code class=
"constant">GL_INDEX_ARRAY
</code>,
318 <code class=
"constant">GL_INDEX_LOGIC_OP
</code>,
319 <code class=
"constant">GL_NORMAL_ARRAY
</code>,
320 <code class=
"constant">GL_POLYGON_OFFSET_FILL
</code>,
321 <code class=
"constant">GL_POLYGON_OFFSET_LINE
</code>,
322 <code class=
"constant">GL_POLYGON_OFFSET_POINT
</code>,
323 <code class=
"constant">GL_TEXTURE_COORD_ARRAY
</code>, and
324 <code class=
"constant">GL_VERTEX_ARRAY
</code>
326 if the GL version is
1.1 or greater.
328 <code class=
"constant">GL_RESCALE_NORMAL
</code>, and
<code class=
"constant">GL_TEXTURE_3D
</code> are available only if the GL
329 version is
1.2 or greater.
331 <code class=
"constant">GL_MULTISAMPLE
</code>,
332 <code class=
"constant">GL_SAMPLE_ALPHA_TO_COVERAGE
</code>,
333 <code class=
"constant">GL_SAMPLE_ALPHA_TO_ONE
</code>,
334 <code class=
"constant">GL_SAMPLE_COVERAGE
</code>,
335 <code class=
"constant">GL_TEXTURE_CUBE_MAP
</code>
336 are available only if the GL version is
1.3 or greater.
338 <code class=
"constant">GL_FOG_COORD_ARRAY
</code> and
<code class=
"constant">GL_SECONDARY_COLOR_ARRAY
</code>
339 are available only if the GL version is
1.4 or greater.
341 <code class=
"constant">GL_POINT_SPRITE
</code>,
342 <code class=
"constant">GL_VERTEX_PROGRAM_POINT_SIZE
</code>, and
343 <code class=
"constant">GL_VERTEX_PROGRAM_TWO_SIDE
</code>
344 are available only if the GL version is
2.0 or greater.
346 <code class=
"constant">GL_COLOR_TABLE
</code>,
<code class=
"constant">GL_CONVOLUTION_1D
</code>,
<code class=
"constant">GL_CONVOLUTION_2D
</code>,
347 <code class=
"constant">GL_HISTOGRAM
</code>,
<code class=
"constant">GL_MINMAX
</code>,
348 <code class=
"constant">GL_POST_COLOR_MATRIX_COLOR_TABLE
</code>,
349 <code class=
"constant">GL_POST_CONVOLUTION_COLOR_TABLE
</code>, and
350 <code class=
"constant">GL_SEPARABLE_2D
</code> are available only if
<code class=
"code">ARB_imaging
</code> is
351 returned when
<a class=
"citerefentry" href=
"glGet.xml"><span class=
"citerefentry"><span class=
"refentrytitle">glGet
</span></span></a> is called with
<code class=
"constant">GL_EXTENSIONS
</code>.
353 For OpenGL versions
1.3 and greater, or when the
<code class=
"code">ARB_multitexture
</code> extension is supported, the following
354 parameters return the associated value for the active texture unit:
355 <code class=
"constant">GL_TEXTURE_1D
</code>,
356 <code class=
"constant">GL_TEXTURE_2D
</code>,
357 <code class=
"constant">GL_TEXTURE_3D
</code>,
358 <code class=
"constant">GL_TEXTURE_CUBE_MAP
</code>,
359 <code class=
"constant">GL_TEXTURE_GEN_S
</code>,
360 <code class=
"constant">GL_TEXTURE_GEN_T
</code>,
361 <code class=
"constant">GL_TEXTURE_GEN_R
</code>,
362 <code class=
"constant">GL_TEXTURE_GEN_Q
</code>,
363 <code class=
"constant">GL_TEXTURE_MATRIX
</code>, and
364 <code class=
"constant">GL_TEXTURE_STACK_DEPTH
</code>.
365 Likewise, the following parameters return the associated value for the
366 active client texture unit:
367 <code class=
"constant">GL_TEXTURE_COORD_ARRAY
</code>,
368 <code class=
"constant">GL_TEXTURE_COORD_ARRAY_SIZE
</code>,
369 <code class=
"constant">GL_TEXTURE_COORD_ARRAY_STRIDE
</code>,
370 <code class=
"constant">GL_TEXTURE_COORD_ARRAY_TYPE
</code>.
371 </p></div><div class=
"refsect1" lang=
"en" xml:
lang=
"en"><a id=
"errors"></a><h2>Errors
</h2><p>
372 <code class=
"constant">GL_INVALID_ENUM
</code> is generated if
<em class=
"parameter"><code>cap
</code></em> is not an accepted value.
374 <code class=
"constant">GL_INVALID_OPERATION
</code> is generated if
<code class=
"function">glIsEnabled
</code>
375 is executed between the execution of
<a class=
"citerefentry" href=
"glBegin.xml"><span class=
"citerefentry"><span class=
"refentrytitle">glBegin
</span></span></a>
376 and the corresponding execution of
<a class=
"citerefentry" href=
"glEnd.xml"><span class=
"citerefentry"><span class=
"refentrytitle">glEnd
</span></span></a>.
377 </p></div><div class=
"refsect1" lang=
"en" xml:
lang=
"en"><a id=
"seealso"></a><h2>See Also
</h2><p>
378 <a class=
"citerefentry" href=
"glEnable.xml"><span class=
"citerefentry"><span class=
"refentrytitle">glEnable
</span></span></a>,
379 <a class=
"citerefentry" href=
"glEnableClientState.xml"><span class=
"citerefentry"><span class=
"refentrytitle">glEnableClientState
</span></span></a>,
380 <a class=
"citerefentry" href=
"glGet.xml"><span class=
"citerefentry"><span class=
"refentrytitle">glGet
</span></span></a>
381 </p></div><div class=
"refsect1" lang=
"en" xml:
lang=
"en"><a id=
"Copyright"></a><h2>Copyright
</h2><p>
382 Copyright
<span class=
"trademark"></span>©
1991-
2006
383 Silicon Graphics, Inc. This document is licensed under the SGI
384 Free Software B License. For details, see
385 <a class=
"ulink" href=
"http://oss.sgi.com/projects/FreeB/" target=
"_top">http://oss.sgi.com/projects/FreeB/
</a>.
386 </p></div></div></body></html>