<?xml version="1.0" encoding="UTF-8"?> <!DOCTYPE book PUBLIC "-//OASIS//DTD DocBook MathML Module V1.1b1//EN" "http://www.oasis-open.org/docbook/xml/mathml/1.1CR1/dbmathml.dtd"> <refentry id="gluGetString"> <refmeta> <refmetainfo> <copyright> <year>1991-2006</year> <holder>Silicon Graphics, Inc.</holder> </copyright> </refmetainfo> <refentrytitle>gluGetString</refentrytitle> <manvolnum>3G</manvolnum> </refmeta> <refnamediv> <refname>gluGetString</refname> <refpurpose>return a string describing the GLU version or GLU extensions </refpurpose> </refnamediv> <refsynopsisdiv><title>C Specification</title> <funcsynopsis> <funcprototype> <funcdef>const GLubyte * <function>gluGetString</function></funcdef> <paramdef>GLenum <parameter>name</parameter></paramdef> </funcprototype> </funcsynopsis> </refsynopsisdiv> <refsect1 id="parameters"><title>Parameters</title> <variablelist> <varlistentry> <term><parameter>name</parameter></term> <listitem> <para> Specifies a symbolic constant, one of <constant>GLU_VERSION</constant>, or <constant>GLU_EXTENSIONS</constant>. </para> </listitem> </varlistentry> </variablelist> </refsect1> <refsect1 id="description"><title>Description</title> <para> <function>gluGetString</function> returns a pointer to a static string describing the GLU version or the GLU extensions that are supported. </para> <para> The version number is one of the following forms: </para> <para> <emphasis>major_number.minor_number</emphasis> <emphasis>major_number.minor_number.release_number</emphasis>. </para> <para> The version string is of the following form: </para> <para> <emphasis>version number<space>vendor-specific information</emphasis> </para> <para> Vendor-specific information is optional. Its format and contents depend on the implementation. </para> <para> The standard GLU contains a basic set of features and capabilities. If a company or group of companies wish to support other features, these may be included as extensions to the GLU. If <parameter>name</parameter> is <constant>GLU_EXTENSIONS</constant>, then <function>gluGetString</function> returns a space-separated list of names of supported GLU extensions. (Extension names never contain spaces.) </para> <para> All strings are null-terminated. </para> </refsect1> <refsect1 id="notes"><title>Notes</title> <para> <function>gluGetString</function> only returns information about GLU extensions. Call <function>glGetString</function> to get a list of GL extensions. </para> <para> <function>gluGetString</function> is an initialization routine. Calling it after a <citerefentry><refentrytitle>glNewList</refentrytitle></citerefentry> results in undefined behavior. </para> </refsect1> <refsect1 id="errors"><title>Errors</title> <para> NULL is returned if <parameter>name</parameter> is not <constant>GLU_VERSION</constant> or <constant>GLU_EXTENSIONS</constant>. </para> <para> </para> </refsect1> <refsect1 id="seealso"><title>See Also</title> <para> <citerefentry><refentrytitle>glGetString</refentrytitle></citerefentry> </para> </refsect1> <refsect1 id="Copyright"><title>Copyright</title> <para> Copyright <trademark class="copyright"></trademark> 1991-2006 Silicon Graphics, Inc. This document is licensed under the SGI Free Software B License. For details, see <ulink url="http://oss.sgi.com/projects/FreeB/">http://oss.sgi.com/projects/FreeB/</ulink>. </para> </refsect1> </refentry>