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glEnableClientState.xml
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glEnableClientState.xml
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<?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="glEnableClientState">
<refmeta>
<refmetainfo>
<copyright>
<year>1991-2006</year>
<holder>Silicon Graphics, Inc.</holder>
</copyright>
</refmetainfo>
<refentrytitle>glEnableClientState</refentrytitle>
<manvolnum>3G</manvolnum>
</refmeta>
<refnamediv>
<refname>glEnableClientState</refname>
<refpurpose>enable or disable client-side capability</refpurpose>
</refnamediv>
<refsynopsisdiv><title>C Specification</title>
<funcsynopsis>
<funcprototype>
<funcdef>void <function>glEnableClientState</function></funcdef>
<paramdef>GLenum <parameter>cap</parameter></paramdef>
</funcprototype>
</funcsynopsis>
</refsynopsisdiv>
<!-- eqn: ignoring delim $$ -->
<refsect1 id="parameters"><title>Parameters</title>
<variablelist>
<varlistentry>
<term><parameter>cap</parameter></term>
<listitem>
<para>
Specifies the capability to enable.
Symbolic constants
<constant>GL_COLOR_ARRAY</constant>,
<constant>GL_EDGE_FLAG_ARRAY</constant>,
<constant>GL_FOG_COORD_ARRAY</constant>,
<constant>GL_INDEX_ARRAY</constant>,
<constant>GL_NORMAL_ARRAY</constant>,
<constant>GL_SECONDARY_COLOR_ARRAY</constant>,
<constant>GL_TEXTURE_COORD_ARRAY</constant>, and
<constant>GL_VERTEX_ARRAY</constant>
are accepted.
</para>
</listitem>
</varlistentry>
</variablelist>
</refsect1>
<refsynopsisdiv><title>C Specification</title>
<funcsynopsis>
<funcprototype>
<funcdef>void <function>glDisableClientState</function></funcdef>
<paramdef>GLenum <parameter>cap</parameter></paramdef>
</funcprototype>
</funcsynopsis>
</refsynopsisdiv>
<refsect1 id="parameters2"><title>Parameters</title>
<variablelist>
<varlistentry>
<term><parameter>cap</parameter></term>
<listitem>
<para>
Specifies the capability to disable.
</para>
</listitem>
</varlistentry>
</variablelist>
</refsect1>
<refsect1 id="description"><title>Description</title>
<para>
<function>glEnableClientState</function> and <citerefentry><refentrytitle>glDisableClientState</refentrytitle></citerefentry>
enable or disable individual client-side capabilities. By default, all
client-side capabilities are disabled.
Both
<function>glEnableClientState</function> and <citerefentry><refentrytitle>glDisableClientState</refentrytitle></citerefentry> take a
single argument, <parameter>cap</parameter>, which can assume one of the following
values:
</para>
<variablelist>
<varlistentry>
<term><constant>GL_COLOR_ARRAY</constant></term>
<listitem>
<para>
If enabled, the color array is enabled for writing and used during
rendering when <citerefentry><refentrytitle>glArrayElement</refentrytitle></citerefentry>, <citerefentry><refentrytitle>glDrawArrays</refentrytitle></citerefentry>, <citerefentry><refentrytitle>glDrawElements</refentrytitle></citerefentry>,
<citerefentry><refentrytitle>glDrawRangeElements</refentrytitle></citerefentry> <citerefentry><refentrytitle>glMultiDrawArrays</refentrytitle></citerefentry>, or
<citerefentry><refentrytitle>glMultiDrawElements</refentrytitle></citerefentry> is called. See <citerefentry><refentrytitle>glColorPointer</refentrytitle></citerefentry>.
</para>
</listitem>
</varlistentry>
<varlistentry>
<term><constant>GL_EDGE_FLAG_ARRAY</constant></term>
<listitem>
<para>
If enabled, the edge flag array is enabled for writing and used during
rendering when <citerefentry><refentrytitle>glArrayElement</refentrytitle></citerefentry>, <citerefentry><refentrytitle>glDrawArrays</refentrytitle></citerefentry>, <citerefentry><refentrytitle>glDrawElements</refentrytitle></citerefentry>,
<citerefentry><refentrytitle>glDrawRangeElements</refentrytitle></citerefentry> <citerefentry><refentrytitle>glMultiDrawArrays</refentrytitle></citerefentry>, or
<citerefentry><refentrytitle>glMultiDrawElements</refentrytitle></citerefentry> is called. See <citerefentry><refentrytitle>glEdgeFlagPointer</refentrytitle></citerefentry>.
</para>
</listitem>
</varlistentry>
<varlistentry>
<term><constant>GL_FOG_COORD_ARRAY</constant></term>
<listitem>
<para>
If enabled, the fog coordinate array is enabled for writing and used during
rendering when <citerefentry><refentrytitle>glArrayElement</refentrytitle></citerefentry>, <citerefentry><refentrytitle>glDrawArrays</refentrytitle></citerefentry>, <citerefentry><refentrytitle>glDrawElements</refentrytitle></citerefentry>,
<citerefentry><refentrytitle>glDrawRangeElements</refentrytitle></citerefentry> <citerefentry><refentrytitle>glMultiDrawArrays</refentrytitle></citerefentry>, or
<citerefentry><refentrytitle>glMultiDrawElements</refentrytitle></citerefentry> is called. See <citerefentry><refentrytitle>glFogCoordPointer</refentrytitle></citerefentry>.
</para>
</listitem>
</varlistentry>
<varlistentry>
<term><constant>GL_INDEX_ARRAY</constant></term>
<listitem>
<para>
If enabled, the index array is enabled for writing and used during
rendering when <citerefentry><refentrytitle>glArrayElement</refentrytitle></citerefentry>, <citerefentry><refentrytitle>glDrawArrays</refentrytitle></citerefentry>, <citerefentry><refentrytitle>glDrawElements</refentrytitle></citerefentry>,
<citerefentry><refentrytitle>glDrawRangeElements</refentrytitle></citerefentry> <citerefentry><refentrytitle>glMultiDrawArrays</refentrytitle></citerefentry>, or
<citerefentry><refentrytitle>glMultiDrawElements</refentrytitle></citerefentry> is called. See <citerefentry><refentrytitle>glIndexPointer</refentrytitle></citerefentry>.
</para>
</listitem>
</varlistentry>
<varlistentry>
<term><constant>GL_NORMAL_ARRAY</constant></term>
<listitem>
<para>
If enabled, the normal array is enabled for writing and used during
rendering when <citerefentry><refentrytitle>glArrayElement</refentrytitle></citerefentry>, <citerefentry><refentrytitle>glDrawArrays</refentrytitle></citerefentry>, <citerefentry><refentrytitle>glDrawElements</refentrytitle></citerefentry>,
<citerefentry><refentrytitle>glDrawRangeElements</refentrytitle></citerefentry> <citerefentry><refentrytitle>glMultiDrawArrays</refentrytitle></citerefentry>, or
<citerefentry><refentrytitle>glMultiDrawElements</refentrytitle></citerefentry> is called. See <citerefentry><refentrytitle>glNormalPointer</refentrytitle></citerefentry>.
</para>
</listitem>
</varlistentry>
<varlistentry>
<term><constant>GL_SECONDARY_COLOR_ARRAY</constant></term>
<listitem>
<para>
If enabled, the secondary color array is enabled for writing and used
during rendering when <citerefentry><refentrytitle>glArrayElement</refentrytitle></citerefentry>, <citerefentry><refentrytitle>glDrawArrays</refentrytitle></citerefentry>,
<citerefentry><refentrytitle>glDrawElements</refentrytitle></citerefentry>, <citerefentry><refentrytitle>glDrawRangeElements</refentrytitle></citerefentry> <citerefentry><refentrytitle>glMultiDrawArrays</refentrytitle></citerefentry>, or
<citerefentry><refentrytitle>glMultiDrawElements</refentrytitle></citerefentry> is called. See <citerefentry><refentrytitle>glColorPointer</refentrytitle></citerefentry>.
</para>
</listitem>
</varlistentry>
<varlistentry>
<term><constant>GL_TEXTURE_COORD_ARRAY</constant></term>
<listitem>
<para>
If enabled, the texture coordinate array is enabled for writing and used
during rendering when <citerefentry><refentrytitle>glArrayElement</refentrytitle></citerefentry>, <citerefentry><refentrytitle>glDrawArrays</refentrytitle></citerefentry>,
<citerefentry><refentrytitle>glDrawElements</refentrytitle></citerefentry>, <citerefentry><refentrytitle>glDrawRangeElements</refentrytitle></citerefentry> <citerefentry><refentrytitle>glMultiDrawArrays</refentrytitle></citerefentry>, or
<citerefentry><refentrytitle>glMultiDrawElements</refentrytitle></citerefentry> is called. See <citerefentry><refentrytitle>glTexCoordPointer</refentrytitle></citerefentry>.
</para>
</listitem>
</varlistentry>
<varlistentry>
<term><constant>GL_VERTEX_ARRAY</constant></term>
<listitem>
<para>
If enabled, the vertex array is enabled for writing and used during
rendering when <citerefentry><refentrytitle>glArrayElement</refentrytitle></citerefentry>, <citerefentry><refentrytitle>glDrawArrays</refentrytitle></citerefentry>, <citerefentry><refentrytitle>glDrawElements</refentrytitle></citerefentry>,
<citerefentry><refentrytitle>glDrawRangeElements</refentrytitle></citerefentry> <citerefentry><refentrytitle>glMultiDrawArrays</refentrytitle></citerefentry>, or
<citerefentry><refentrytitle>glMultiDrawElements</refentrytitle></citerefentry> is called. See <citerefentry><refentrytitle>glVertexPointer</refentrytitle></citerefentry>.
</para>
</listitem>
</varlistentry>
</variablelist>
</refsect1>
<refsect1 id="notes"><title>Notes</title>
<para>
<function>glEnableClientState</function> is available only if the GL version is 1.1 or greater.
</para>
<para>
<constant>GL_FOG_COORD_ARRAY</constant> and <constant>GL_SECONDARY_COLOR_ARRAY</constant> are available only if the GL version is 1.4 or
greater.
</para>
<para>
For OpenGL versions 1.3 and greater, or when <code>ARB_multitexture</code> is supported, enabling and disabling
<constant>GL_TEXTURE_COORD_ARRAY</constant> affects the active client texture unit.
The active client texture unit is controlled with
<citerefentry><refentrytitle>glClientActiveTexture</refentrytitle></citerefentry>.
</para>
</refsect1>
<refsect1 id="errors"><title>Errors</title>
<para>
<constant>GL_INVALID_ENUM</constant> is generated if <parameter>cap</parameter> is not an accepted value.
</para>
<para>
<function>glEnableClientState</function> is not allowed between the execution of <citerefentry><refentrytitle>glBegin</refentrytitle></citerefentry> and the
corresponding <citerefentry><refentrytitle>glEnd</refentrytitle></citerefentry>, but an error may or may not be generated. If
no error is generated, the behavior is undefined.
</para>
</refsect1>
<refsect1 id="seealso"><title>See Also</title>
<para>
<citerefentry><refentrytitle>glArrayElement</refentrytitle></citerefentry>,
<citerefentry><refentrytitle>glClientActiveTexture</refentrytitle></citerefentry>,
<citerefentry><refentrytitle>glColorPointer</refentrytitle></citerefentry>,
<citerefentry><refentrytitle>glDrawArrays</refentrytitle></citerefentry>,
<citerefentry><refentrytitle>glDrawElements</refentrytitle></citerefentry>,
<citerefentry><refentrytitle>glEdgeFlagPointer</refentrytitle></citerefentry>,
<citerefentry><refentrytitle>glFogCoordPointer</refentrytitle></citerefentry>,
<citerefentry><refentrytitle>glEnable</refentrytitle></citerefentry>,
<citerefentry><refentrytitle>glGetPointerv</refentrytitle></citerefentry>,
<citerefentry><refentrytitle>glIndexPointer</refentrytitle></citerefentry>,
<citerefentry><refentrytitle>glInterleavedArrays</refentrytitle></citerefentry>,
<citerefentry><refentrytitle>glNormalPointer</refentrytitle></citerefentry>,
<citerefentry><refentrytitle>glSecondaryColorPointer</refentrytitle></citerefentry>,
<citerefentry><refentrytitle>glTexCoordPointer</refentrytitle></citerefentry>,
<citerefentry><refentrytitle>glVertexPointer</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>