+<?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="glGetBufferPointerv">
+ <refmeta>
+ <refmetainfo>
+ <copyright>
+ <year>2005</year>
+ <holder>Sams Publishing</holder>
+ </copyright>
+ </refmetainfo>
+ <refentrytitle>glGetBufferPointerv</refentrytitle>
+ <manvolnum>3G</manvolnum>
+ </refmeta>
+ <refnamediv>
+ <refname>glGetBufferPointerv</refname>
+ <refpurpose>return the pointer to a mapped buffer object's data store</refpurpose>
+ </refnamediv>
+ <refsynopsisdiv><title>C Specification</title>
+ <funcsynopsis>
+ <funcprototype>
+ <funcdef>void <function>glGetBufferPointerv</function></funcdef>
+ <paramdef>GLenum <parameter>target</parameter></paramdef>
+ <paramdef>GLenum <parameter>pname</parameter></paramdef>
+ <paramdef>GLvoid ** <parameter>params</parameter></paramdef>
+ </funcprototype>
+ </funcsynopsis>
+ </refsynopsisdiv>
+ <refsect1 id="parameters"><title>Parameters</title>
+ <variablelist>
+ <varlistentry>
+ <term><parameter>target</parameter></term>
+ <listitem>
+ <para>
+ Specifies the target buffer object.
+ The symbolic constant must be <constant>GL_ARRAY_BUFFER</constant>,
+ <constant>GL_ELEMENT_ARRAY_BUFFER</constant>,
+ <constant>GL_PIXEL_PACK_BUFFER</constant>, or
+ <constant>GL_PIXEL_UNPACK_BUFFER</constant>.
+ </para>
+ </listitem>
+ </varlistentry>
+ <varlistentry>
+ <term><parameter>pname</parameter></term>
+ <listitem>
+ <para>
+ Specifies the pointer to be returned. The symbolic constant must be <constant>GL_BUFFER_MAP_POINTER</constant>.
+ </para>
+ </listitem>
+ </varlistentry>
+ <varlistentry>
+ <term><parameter>params</parameter></term>
+ <listitem>
+ <para>
+ Returns the pointer value specified by <parameter>pname</parameter>.
+ </para>
+ </listitem>
+ </varlistentry>
+ </variablelist>
+ </refsect1>
+ <refsect1 id="description"><title>Description</title>
+ <para>
+ <function>glGetBufferPointerv</function> returns pointer information. <parameter>pname</parameter> is a symbolic constant
+ indicating the pointer to be returned, which must be <constant>GL_BUFFER_MAP_POINTER</constant>, the pointer
+ to which the buffer object's data store is mapped. If the data store is not currently mapped, <constant>NULL</constant> is returned.
+ <parameter>params</parameter> is a pointer to a location in which to place the returned pointer value.
+ </para>
+ </refsect1>
+ <refsect1 id="notes"><title>Notes</title>
+ <para>
+ If an error is generated,
+ no change is made to the contents of <parameter>params</parameter>.
+ </para>
+ <para>
+ <function>glGetBufferPointerv</function> is available only if the GL version is 1.5 or greater.
+ </para>
+ <para>
+ Targets <constant>GL_PIXEL_PACK_BUFFER</constant> and <constant>GL_PIXEL_UNPACK_BUFFER</constant> are available
+ only if the GL version is 2.1 or greater.
+ </para>
+ <para>
+ The initial value for the pointer is <constant>NULL</constant>.
+ </para>
+ </refsect1>
+ <refsect1 id="errors"><title>Errors</title>
+ <para>
+ <constant>GL_INVALID_ENUM</constant> is generated if <parameter>target</parameter> or <parameter>pname</parameter> is not an
+ accepted value.
+ </para>
+ <para>
+ <constant>GL_INVALID_OPERATION</constant> is generated if the reserved buffer object name 0 is bound to <parameter>target</parameter>.
+ </para>
+ <para>
+ <constant>GL_INVALID_OPERATION</constant> is generated if <function>glGetBufferPointerv</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>glBindBuffer</refentrytitle></citerefentry>,
+ <citerefentry><refentrytitle>glMapBuffer</refentrytitle></citerefentry>
+ </para>
+ </refsect1>
+ <refsect1 id="Copyright"><title>Copyright</title>
+ <para>
+ Copyright <trademark class="copyright"></trademark> 2005 Addison-Wesley.
+ This material may be distributed subject to the terms and conditions set forth in
+ the Open Publication License, v 1.0, 8 June 1999.
+ <ulink url="http://opencontent.org/openpub/">http://opencontent.org/openpub/</ulink>.
+ </para>
+ </refsect1>
+</refentry>