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4 Reference Pages
</title><meta name=
"generator" content=
"DocBook XSL Stylesheets V1.69.1" /></head><body><div class=
"refentry" lang=
"en" xml:
lang=
"en"><a id=
"glActiveTexture"></a><div class=
"titlepage"></div><div class=
"refnamediv"><h2>Name
</h2><p>glActiveTexture — select active texture unit
</p></div><div class=
"refsynopsisdiv"><h2>C Specification
</h2><div class=
"funcsynopsis"><p><code class=
"funcdef">void
<b class=
"fsfunc">glActiveTexture
</b>(
</code>GLenum
<var class=
"pdparam">texture
</var><code>)
</code>;
</p></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>texture
</code></em></span></dt><dd><p>
5 Specifies which texture unit to make active. The number
6 of texture units is implementation dependent, but must be at least
7 80.
<em class=
"parameter"><code>texture
</code></em> must be one of
8 <code class=
"constant">GL_TEXTURE
<span class=
"emphasis"><em>i
</em></span></code>,
10 <span class=
"emphasis"><em>i
</em></span> ranges from
0 (
<code class=
"constant">GL_MAX_COMBINED_TEXTURE_IMAGE_UNITS
</code> -
1).
11 The initial value is
<code class=
"constant">GL_TEXTURE0
</code>.
12 </p></dd></dl></div></div><div class=
"refsect1" lang=
"en" xml:
lang=
"en"><a id=
"description"></a><h2>Description
</h2><p>
13 <code class=
"function">glActiveTexture
</code> selects which texture unit subsequent texture state calls will
14 affect. The number of texture units an implementation supports is
15 implementation dependent, but must be at least
80.
16 </p></div><div class=
"refsect1" lang=
"en" xml:
lang=
"en"><a id=
"errors"></a><h2>Errors
</h2><p>
17 <code class=
"constant">GL_INVALID_ENUM
</code> is generated if
<em class=
"parameter"><code>texture
</code></em> is not one of
18 <code class=
"constant">GL_TEXTURE
<span class=
"emphasis"><em>i
</em></span></code>,
19 where
<span class=
"emphasis"><em>i
</em></span> ranges from
0 to (
<code class=
"constant">GL_MAX_COMBINED_TEXTURE_IMAGE_UNITS
</code> -
1).
20 </p></div><div class=
"refsect1" lang=
"en" xml:
lang=
"en"><a id=
"associatedgets"></a><h2>Associated Gets
</h2><p>
21 <a href=
"glGet.xml"><span class=
"citerefentry"><span class=
"refentrytitle">glGet
</span></span></a> with argument
<code class=
"constant">GL_ACTIVE_TEXTURE
</code>, or
<code class=
"constant">GL_MAX_COMBINED_TEXTURE_IMAGE_UNITS
</code>.
22 </p></div><div class=
"refsect1" lang=
"en" xml:
lang=
"en"><a id=
"seealso"></a><h2>See Also
</h2><p>
23 <a href=
"glGenTextures.xml"><span class=
"citerefentry"><span class=
"refentrytitle">glGenTextures
</span></span></a>,
24 <a href=
"glBindTexture.xml"><span class=
"citerefentry"><span class=
"refentrytitle">glBindTexture
</span></span></a>,
25 <a href=
"glCompressedTexImage1D.xml"><span class=
"citerefentry"><span class=
"refentrytitle">glCompressedTexImage1D
</span></span></a>,
26 <a href=
"glCompressedTexImage2D.xml"><span class=
"citerefentry"><span class=
"refentrytitle">glCompressedTexImage2D
</span></span></a>,
27 <a href=
"glCompressedTexImage3D.xml"><span class=
"citerefentry"><span class=
"refentrytitle">glCompressedTexImage3D
</span></span></a>,
28 <a href=
"glCompressedTexSubImage1D.xml"><span class=
"citerefentry"><span class=
"refentrytitle">glCompressedTexSubImage1D
</span></span></a>,
29 <a href=
"glCompressedTexSubImage2D.xml"><span class=
"citerefentry"><span class=
"refentrytitle">glCompressedTexSubImage2D
</span></span></a>,
30 <a href=
"glCompressedTexSubImage3D.xml"><span class=
"citerefentry"><span class=
"refentrytitle">glCompressedTexSubImage3D
</span></span></a>,
31 <a href=
"glCopyTexImage1D.xml"><span class=
"citerefentry"><span class=
"refentrytitle">glCopyTexImage1D
</span></span></a>,
32 <a href=
"glCopyTexImage2D.xml"><span class=
"citerefentry"><span class=
"refentrytitle">glCopyTexImage2D
</span></span></a>,
33 <a href=
"glCopyTexSubImage1D.xml"><span class=
"citerefentry"><span class=
"refentrytitle">glCopyTexSubImage1D
</span></span></a>,
34 <a href=
"glCopyTexSubImage2D.xml"><span class=
"citerefentry"><span class=
"refentrytitle">glCopyTexSubImage2D
</span></span></a>,
35 <a href=
"glCopyTexSubImage3D.xml"><span class=
"citerefentry"><span class=
"refentrytitle">glCopyTexSubImage3D
</span></span></a>,
36 <a href=
"glDeleteTextures.xml"><span class=
"citerefentry"><span class=
"refentrytitle">glDeleteTextures
</span></span></a>
37 <a href=
"glIsTexture.xml"><span class=
"citerefentry"><span class=
"refentrytitle">glIsTexture
</span></span></a>,
38 <a href=
"glTexImage1D.xml"><span class=
"citerefentry"><span class=
"refentrytitle">glTexImage1D
</span></span></a>,
39 <a href=
"glTexImage2D.xml"><span class=
"citerefentry"><span class=
"refentrytitle">glTexImage2D
</span></span></a>,
40 <a href=
"glTexImage2DMultisample.xml"><span class=
"citerefentry"><span class=
"refentrytitle">glTexImage2DMultisample
</span></span></a>,
41 <a href=
"glTexImage3D.xml"><span class=
"citerefentry"><span class=
"refentrytitle">glTexImage3D
</span></span></a>,
42 <a href=
"glTexImage3DMultisample.xml"><span class=
"citerefentry"><span class=
"refentrytitle">glTexImage3DMultisample
</span></span></a>,
43 <a href=
"glTexSubImage1D.xml"><span class=
"citerefentry"><span class=
"refentrytitle">glTexSubImage1D
</span></span></a>,
44 <a href=
"glTexSubImage2D.xml"><span class=
"citerefentry"><span class=
"refentrytitle">glTexSubImage2D
</span></span></a>,
45 <a href=
"glTexSubImage3D.xml"><span class=
"citerefentry"><span class=
"refentrytitle">glTexSubImage3D
</span></span></a>,
46 <a href=
"glTexParameter.xml"><span class=
"citerefentry"><span class=
"refentrytitle">glTexParameter
</span></span></a>,
47 </p></div><div class=
"refsect1" lang=
"en" xml:
lang=
"en"><a id=
"Copyright"></a><h2>Copyright
</h2><p>
48 Copyright
<span class=
"trademark"></span>©
1991-
2006
49 Silicon Graphics, Inc. This document is licensed under the SGI
50 Free Software B License. For details, see
51 <a href=
"http://oss.sgi.com/projects/FreeB/" target=
"_top">http://oss.sgi.com/projects/FreeB/
</a>.
52 </p></div></div></body></html>