<div class="refentry" title="glClientActiveTexture"><a id="glClientActiveTexture"></a><div class="titlepage"></div><div class="refnamediv"><h2>Name</h2><p>glClientActiveTexture — select client-side active texture unit</p></div><div class="refsynopsisdiv" title="C Specification"><h2>C Specification</h2><div class="funcsynopsis"><table class="funcprototype-table"><tr><td><code class="funcdef">void <b class="fsfunc">glClientActiveTexture</b>(</code></td><td>GLenum <var class="pdparam">texture</var><code>)</code>;</td></tr></table><div class="funcprototype-spacer"> </div></div></div><div class="refsect1" title="Parameters"><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>

Specifies which texture unit to make active. The

number of texture units is implementation dependent, but

must be at least two.

<em class="parameter"><code>texture</code></em> must be one of

<code class="constant">GL_TEXTURE</code><em class="replaceable"><code>i</code></em>,

<math overflow="scroll">

<mn>0</mn>

<mo>&lt;=</mo>

<mi>i</mi>

<mo>&lt;</mo>

<mi>GL_MAX_TEXTURE_UNITS</mi>

</math>,

which is an implementation-dependent value. The initial

value is <code class="constant">GL_TEXTURE0</code>.

</p></dd></dl></div></div><div class="refsect1" title="Description"><a id="description"></a><h2>Description</h2><p>

<code class="function">glClientActiveTexture</code>

selects the vertex array client state parameters to be modified

by

<a class="citerefentry" href="glTexCoordPointer"><span class="citerefentry"><span class="refentrytitle">glTexCoordPointer</span></span></a>,

and enabled or disabled with

<a class="citerefentry" href="glEnableClientState"><span class="citerefentry"><span class="refentrytitle">glEnableClientState</span></span></a>

or

<a class="citerefentry" href="glDisableClientState"><span class="citerefentry"><span class="refentrytitle">glDisableClientState</span></span></a>,

respectively, when called with a parameter of

<code class="constant">GL_TEXTURE_COORD_ARRAY</code>.</p></div><div class="refsect1" title="Errors"><a id="errors"></a><h2>Errors</h2><p>

<code class="constant">GL_INVALID_ENUM</code> is generated if

<em class="parameter"><code>texture</code></em> is not one of

<code class="constant">GL_TEXTURE</code><em class="replaceable"><code>i</code></em>,

where

<math overflow="scroll">

<mn>0</mn>

<mo>&lt;=</mo>

<mi>i</mi>

<mo>&lt;</mo>

<mi>GL_MAX_TEXTURE_UNITS</mi>

</math>.

</p></div><div class="refsect1" title="Notes"><a id="notes"></a><h2>Notes</h2><p>It is always the case that

<math overflow="scroll">

<mi>GL_TEXTURE</mi><mi>i</mi> <mo>=</mo>

<mi>GL_TEXTURE0</mi><mo>+</mo><mi>i</mi>

</math>.</p></div><div class="refsect1" title="Associated Gets"><a id="associatedgets"></a><h2>Associated Gets</h2><p>

<a class="citerefentry" href="glGet"><span class="citerefentry"><span class="refentrytitle">glGet</span></span></a>

with argument <code class="constant">GL_CLIENT_ACTIVE_TEXTURE</code> or

<code class="constant">GL_MAX_TEXTURE_UNITS</code>

</p></div><div class="refsect1" title="See Also"><a id="seealso"></a><h2>See Also</h2><p>

<a class="citerefentry" href="glActiveTexture"><span class="citerefentry"><span class="refentrytitle">glActiveTexture</span></span></a>,

<a class="citerefentry" href="glEnableClientState"><span class="citerefentry"><span class="refentrytitle">glEnableClientState</span></span></a>,

<a class="citerefentry" href="glGet"><span class="citerefentry"><span class="refentrytitle">glGet</span></span></a>,

<a class="citerefentry" href="glMultiTexCoord"><span class="citerefentry"><span class="refentrytitle">glMultiTexCoord</span></span></a>,

<a class="citerefentry" href="glTexCoordPointer"><span class="citerefentry"><span class="refentrytitle">glTexCoordPointer</span></span></a>

</p></div><div class="refsect1" title="Copyright"><a id="copyright"></a><h2>Copyright</h2><p>

Copyright © 2003-2004

Silicon Graphics, Inc. This document is licensed under the SGI

Free Software B License. For details, see

<a class="ulink" href="https://web.archive.org/web/20171022161616/http://oss.sgi.com/projects/FreeB/" target="_top">https://web.archive.org/web/20171022161616/http://oss.sgi.com/projects/FreeB/</a>.

</p></div></div>