<?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="glIsList"> <refmeta> <refmetainfo> <copyright> <year>1991-2006</year> <holder>Silicon Graphics, Inc.</holder> </copyright> </refmetainfo> <refentrytitle>glIsList</refentrytitle> <manvolnum>3G</manvolnum> </refmeta> <refnamediv> <refname>glIsList</refname> <refpurpose>determine if a name corresponds to a display list</refpurpose> </refnamediv> <refsynopsisdiv><title>C Specification</title> <funcsynopsis> <funcprototype> <funcdef>GLboolean <function>glIsList</function></funcdef> <paramdef>GLuint <parameter>list</parameter></paramdef> </funcprototype> </funcsynopsis> </refsynopsisdiv> <refsect1 id="parameters"><title>Parameters</title> <variablelist> <varlistentry> <term><parameter>list</parameter></term> <listitem> <para> Specifies a potential display list name. </para> </listitem> </varlistentry> </variablelist> </refsect1> <refsect1 id="description"><title>Description</title> <para> <function>glIsList</function> returns <constant>GL_TRUE</constant> if <parameter>list</parameter> is the name of a display list and returns <constant>GL_FALSE</constant> if it is not, or if an error occurs. </para> <para> A name returned by <citerefentry><refentrytitle>glGenLists</refentrytitle></citerefentry>, but not yet associated with a display list by calling <citerefentry><refentrytitle>glNewList</refentrytitle></citerefentry>, is not the name of a display list. </para> </refsect1> <refsect1 id="errors"><title>Errors</title> <para> <constant>GL_INVALID_OPERATION</constant> is generated if <function>glIsList</function> is executed between the execution of <citerefentry><refentrytitle>glBegin</refentrytitle></citerefentry> and the corresponding execution of <citerefentry><refentrytitle>glEnd</refentrytitle></citerefentry>. </para> </refsect1> <refsect1 id="seealso"><title>See Also</title> <para> <citerefentry><refentrytitle>glCallList</refentrytitle></citerefentry>, <citerefentry><refentrytitle>glCallLists</refentrytitle></citerefentry>, <citerefentry><refentrytitle>glDeleteLists</refentrytitle></citerefentry>, <citerefentry><refentrytitle>glGenLists</refentrytitle></citerefentry>, <citerefentry><refentrytitle>glNewList</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>