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<!DOCTYPE refentry [ <!ENTITY % mathent SYSTEM "math.ent"> %mathent; ]>
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<refentry xmlns="http://docbook.org/ns/docbook" version="5.0" xml:id="glGetVertexAttribPointerv">
<info>
<copyright>
<year>2003-2005</year>
<holder>3Dlabs Inc. Ltd.</holder>
</copyright>
<copyright>
<year>2010-2014</year>
<holder>Khronos Group</holder>
</copyright>
</info>
<refmeta>
<refentrytitle>glGetVertexAttribPointerv</refentrytitle>
<manvolnum>3G</manvolnum>
</refmeta>
<refnamediv>
<refname>glGetVertexAttribPointerv</refname>
<refpurpose>return the address of the specified generic vertex attribute pointer</refpurpose>
</refnamediv>
<refsynopsisdiv><title>C Specification</title>
<funcsynopsis>
<funcprototype>
<funcdef>void <function>glGetVertexAttribPointerv</function></funcdef>
<paramdef>GLuint <parameter>index</parameter></paramdef>
<paramdef>GLenum <parameter>pname</parameter></paramdef>
<paramdef>GLvoid **<parameter>pointer</parameter></paramdef>
</funcprototype>
</funcsynopsis>
</refsynopsisdiv>
<refsect1 xml:id="parameters"><title>Parameters</title>
<variablelist>
<varlistentry>
<term><parameter>index</parameter></term>
<listitem>
<para>Specifies the generic vertex attribute
parameter to be returned.</para>
</listitem>
</varlistentry>
<varlistentry>
<term><parameter>pname</parameter></term>
<listitem>
<para>Specifies the symbolic name of the generic
vertex attribute parameter to be returned. Must be
<constant>GL_VERTEX_ATTRIB_ARRAY_POINTER</constant>.</para>
</listitem>
</varlistentry>
<varlistentry>
<term><parameter>pointer</parameter></term>
<listitem>
<para>Returns the pointer value.</para>
</listitem>
</varlistentry>
</variablelist>
</refsect1>
<refsect1 xml:id="description"><title>Description</title>
<para><function>glGetVertexAttribPointerv</function> returns
pointer information. <parameter>index</parameter> is the generic
vertex attribute to be queried, <parameter>pname</parameter> is
a symbolic constant indicating the pointer to be returned, and
<parameter>params</parameter> is a pointer to a location in
which to place the returned data.</para>
<para>The <parameter>pointer</parameter> returned is a byte offset into the data store of the buffer object
that was bound to the <constant>GL_ARRAY_BUFFER</constant> target
(see <citerefentry><refentrytitle>glBindBuffer</refentrytitle></citerefentry>) when the desired pointer was previously specified.
</para>
</refsect1>
<refsect1 xml:id="notes"><title>Notes</title>
<para>The state returned is retrieved from the currently bound vertex array object.</para>
<para>The initial value for each pointer is 0.</para>
</refsect1>
<refsect1 xml:id="errors"><title>Errors</title>
<para><constant>GL_INVALID_OPERATION</constant> is generated if no vertex array object is currently bound.</para>
<para><constant>GL_INVALID_VALUE</constant>
is generated if <parameter>index</parameter>
is greater than or equal to <constant>GL_MAX_VERTEX_ATTRIBS</constant>.</para>
<para><constant>GL_INVALID_ENUM</constant>
is generated if <parameter>pname</parameter>
is not an accepted value.</para>
</refsect1>
<refsect1 xml:id="associatedgets"><title>Associated Gets</title>
<para><citerefentry><refentrytitle>glGet</refentrytitle></citerefentry>
with argument <constant>GL_MAX_VERTEX_ATTRIBS</constant></para>
</refsect1>
<refsect1 xml:id="versions"><title>Version Support</title>
<informaltable>
<tgroup cols="13" align="left">
<xi:include xmlns:xi="http://www.w3.org/2001/XInclude" href="apifunchead.xml" xpointer="xpointer(/*/*)"/>
<tbody>
<row>
<entry><function>glGetVertexAttribPointerv</function></entry>
<xi:include xmlns:xi="http://www.w3.org/2001/XInclude" href="apiversion.xml" xpointer="xpointer(/*/*[@role='20']/*)"/>
</row>
</tbody>
</tgroup>
</informaltable>
</refsect1>
<refsect1 xml:id="seealso"><title>See Also</title>
<para><citerefentry><refentrytitle>glGetVertexAttrib</refentrytitle></citerefentry>,
<citerefentry><refentrytitle>glVertexAttribPointer</refentrytitle></citerefentry></para>
</refsect1>
<refsect1 xml:id="Copyright"><title>Copyright</title>
<para>
Copyright <trademark class="copyright"/> 2003-2005 3Dlabs Inc. Ltd.
Copyright <trademark class="copyright"/> 2010-2014 Khronos Group.
This material may be distributed subject to the terms and conditions set forth in
the Open Publication License, v 1.0, 8 June 1999.
<link xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="http://opencontent.org/openpub/">http://opencontent.org/openpub/</link>.
</para>
</refsect1>
</refentry>
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