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102 lines
5.5 KiB
XML
102 lines
5.5 KiB
XML
<?xml version="1.0" encoding="UTF-8"?>
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<!DOCTYPE book PUBLIC "-//OASIS//DTD DocBook MathML Module V1.1b1//EN"
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"http://www.oasis-open.org/docbook/xml/mathml/1.1CR1/dbmathml.dtd">
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<refentry id="glActiveTexture">
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<refmeta>
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<refmetainfo>
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<copyright>
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<year>1991-2006</year>
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<holder>Silicon Graphics, Inc.</holder>
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</copyright>
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</refmetainfo>
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<refentrytitle>glActiveTexture</refentrytitle>
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<manvolnum>3G</manvolnum>
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</refmeta>
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<refnamediv>
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<refname>glActiveTexture</refname>
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<refpurpose>select active texture unit</refpurpose>
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</refnamediv>
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<refsynopsisdiv><title>C Specification</title>
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<funcsynopsis>
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<funcprototype>
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<funcdef>void <function>glActiveTexture</function></funcdef>
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<paramdef>GLenum <parameter>texture</parameter></paramdef>
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</funcprototype>
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</funcsynopsis>
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</refsynopsisdiv>
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<!-- eqn: ignoring delim $$ -->
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<refsect1 id="parameters"><title>Parameters</title>
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<variablelist>
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<varlistentry>
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<term><parameter>texture</parameter></term>
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<listitem>
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<para>
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Specifies which texture unit to make active. The number
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of texture units is implementation dependent, but must be at least
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two. <parameter>texture</parameter> must be one of
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<constant>GL_TEXTURE<emphasis>i</emphasis></constant>,
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where
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<emphasis>i</emphasis> ranges from 0 (<constant>GL_MAX_COMBINED_TEXTURE_IMAGE_UNITS</constant> - 1).
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The initial value is <constant>GL_TEXTURE0</constant>.
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</para>
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</listitem>
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</varlistentry>
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</variablelist>
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</refsect1>
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<refsect1 id="description"><title>Description</title>
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<para>
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<function>glActiveTexture</function> selects which texture unit subsequent texture state calls will
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affect. The number of texture units an implementation supports is
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implementation dependent, but must be at least 48.
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</para>
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</refsect1>
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<refsect1 id="errors"><title>Errors</title>
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<para>
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<constant>GL_INVALID_ENUM</constant> is generated if <parameter>texture</parameter> is not one of
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<constant>GL_TEXTURE<emphasis>i</emphasis></constant>,
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where <emphasis>i</emphasis> ranges from 0 to (<constant>GL_MAX_COMBINED_TEXTURE_IMAGE_UNITS</constant> - 1).
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</para>
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</refsect1>
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<refsect1 id="associatedgets"><title>Associated Gets</title>
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<para>
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<citerefentry><refentrytitle>glGet</refentrytitle></citerefentry> with argument <constant>GL_ACTIVE_TEXTURE</constant>, or <constant>GL_MAX_COMBINED_TEXTURE_IMAGE_UNITS</constant>.
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</para>
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</refsect1>
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<refsect1 id="seealso"><title>See Also</title>
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<para>
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<citerefentry><refentrytitle>glGenTextures</refentrytitle></citerefentry>,
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<citerefentry><refentrytitle>glBindTexture</refentrytitle></citerefentry>,
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<citerefentry><refentrytitle>glCompressedTexImage1D</refentrytitle></citerefentry>,
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<citerefentry><refentrytitle>glCompressedTexImage2D</refentrytitle></citerefentry>,
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<citerefentry><refentrytitle>glCompressedTexImage3D</refentrytitle></citerefentry>,
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<citerefentry><refentrytitle>glCompressedTexSubImage1D</refentrytitle></citerefentry>,
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<citerefentry><refentrytitle>glCompressedTexSubImage2D</refentrytitle></citerefentry>,
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<citerefentry><refentrytitle>glCompressedTexSubImage3D</refentrytitle></citerefentry>,
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<citerefentry><refentrytitle>glCopyTexImage1D</refentrytitle></citerefentry>,
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<citerefentry><refentrytitle>glCopyTexImage2D</refentrytitle></citerefentry>,
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<citerefentry><refentrytitle>glCopyTexSubImage1D</refentrytitle></citerefentry>,
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<citerefentry><refentrytitle>glCopyTexSubImage2D</refentrytitle></citerefentry>,
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<citerefentry><refentrytitle>glCopyTexSubImage3D</refentrytitle></citerefentry>,
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<citerefentry><refentrytitle>glDeleteTextures</refentrytitle></citerefentry>
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<citerefentry><refentrytitle>glIsTexture</refentrytitle></citerefentry>,
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<citerefentry><refentrytitle>glTexImage1D</refentrytitle></citerefentry>,
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<citerefentry><refentrytitle>glTexImage2D</refentrytitle></citerefentry>,
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<citerefentry><refentrytitle>glTexImage2DMultisample</refentrytitle></citerefentry>,
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<citerefentry><refentrytitle>glTexImage3D</refentrytitle></citerefentry>,
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<citerefentry><refentrytitle>glTexImage3DMultisample</refentrytitle></citerefentry>,
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<citerefentry><refentrytitle>glTexSubImage1D</refentrytitle></citerefentry>,
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<citerefentry><refentrytitle>glTexSubImage2D</refentrytitle></citerefentry>,
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<citerefentry><refentrytitle>glTexSubImage3D</refentrytitle></citerefentry>,
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<citerefentry><refentrytitle>glTexParameter</refentrytitle></citerefentry>,
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</para>
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</refsect1>
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<refsect1 id="Copyright"><title>Copyright</title>
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<para>
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Copyright <trademark class="copyright"></trademark> 1991-2006
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Silicon Graphics, Inc. This document is licensed under the SGI
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Free Software B License. For details, see
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<ulink url="http://oss.sgi.com/projects/FreeB/">http://oss.sgi.com/projects/FreeB/</ulink>.
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</para>
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</refsect1>
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</refentry>
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