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108 lines
4.3 KiB
XML
108 lines
4.3 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="gluGetString">
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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>gluGetString</refentrytitle>
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<manvolnum>3G</manvolnum>
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</refmeta>
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<refnamediv>
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<refname>gluGetString</refname>
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<refpurpose>return a string describing the GLU version or GLU extensions </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>const GLubyte * <function>gluGetString</function></funcdef>
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<paramdef>GLenum <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>name</parameter></term>
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<listitem>
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<para>
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Specifies a symbolic constant, one of
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<constant>GLU_VERSION</constant>, or <constant>GLU_EXTENSIONS</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>gluGetString</function> returns a pointer to a static string describing the
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GLU version or the GLU extensions that are supported.
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</para>
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<para>
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The version number is one of the following
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forms:
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</para>
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<para>
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<emphasis>major_number.minor_number</emphasis>
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<emphasis>major_number.minor_number.release_number</emphasis>.
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</para>
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<para>
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The version string is of the following form:
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</para>
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<para>
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<emphasis>version number<space>vendor-specific information</emphasis>
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</para>
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<para>
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Vendor-specific information is optional.
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Its format and contents depend on the implementation.
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</para>
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<para>
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The standard GLU contains a basic set of features and capabilities.
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If a company or group of companies wish to support other features,
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these may be included as extensions to the GLU.
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If <parameter>name</parameter> is
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<constant>GLU_EXTENSIONS</constant>, then <function>gluGetString</function>
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returns a space-separated list of names of supported GLU extensions.
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(Extension names never contain spaces.)
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</para>
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<para>
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All strings are null-terminated.
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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>gluGetString</function> only returns information about GLU extensions. Call <function>glGetString</function>
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to get a list of GL extensions.
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</para>
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<para>
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<function>gluGetString</function> is an initialization routine. Calling it after
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a <citerefentry><refentrytitle>glNewList</refentrytitle></citerefentry> results in undefined behavior.
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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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NULL is returned if <parameter>name</parameter> is not
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<constant>GLU_VERSION</constant> or <constant>GLU_EXTENSIONS</constant>.
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</para>
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<para>
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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>glGetString</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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