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82 lines
3.6 KiB
XML
82 lines
3.6 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="glGetFragDataIndex">
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<refentryinfo>
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<copyright>
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<year>2010-2013</year>
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<holder>Khronos Group</holder>
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</copyright>
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</refentryinfo>
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<refmeta>
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<refentrytitle>glGetFragDataIndex</refentrytitle>
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<manvolnum>3G</manvolnum>
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</refmeta>
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<refnamediv>
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<refname>glGetFragDataIndex</refname>
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<refpurpose>query the bindings of color indices to user-defined varying out variables</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>GLint <function>glGetFragDataIndex</function></funcdef>
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<paramdef>GLuint <parameter>program</parameter></paramdef>
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<paramdef>const char * <parameter>name</parameter></paramdef>
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</funcprototype>
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</funcsynopsis>
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</refsynopsisdiv>
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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>program</parameter></term>
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<listitem>
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<para>
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The name of the program containing varying out variable whose binding to query
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</para>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term><parameter>name</parameter></term>
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<listitem>
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<para>
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The name of the user-defined varying out variable whose index to query
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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>glGetFragDataIndex</function> returns the index of the fragment color to which the variable <parameter>name</parameter>
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was bound when the program object <parameter>program</parameter> was last linked. If <parameter>name</parameter> is not a varying out
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variable of <parameter>program</parameter>, or if an error occurs, -1 will be returned.
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</para>
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</refsect1>
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<refsect1 id="notes"><title>Notes</title>
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<para>
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<function>glGetFragDataIndex</function> is available only if the GL version is 3.3 or greater.
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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_OPERATION</constant> is generated if <parameter>program</parameter> is not the name of a program object.
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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>glCreateProgram</refentrytitle></citerefentry>,
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<citerefentry><refentrytitle>glBindFragDataLocation</refentrytitle></citerefentry>,
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<citerefentry><refentrytitle>glBindFragDataLocationIndexed</refentrytitle></citerefentry>,
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<citerefentry><refentrytitle>glGetFragDataLocation</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> 2010-2013 Khronos Group.
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This material may be distributed subject to the terms and conditions set forth in
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the Open Publication License, v 1.0, 8 June 1999.
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<ulink url="http://opencontent.org/openpub/">http://opencontent.org/openpub/</ulink>.
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</para>
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</refsect1>
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</refentry>
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