
<refentry id="glGetPointerv">
    <refmeta>
        <refmetainfo>
            <copyright>
                <year>1991-2006</year>
                <holder>Silicon Graphics, Inc.</holder>
            </copyright>
        </refmetainfo>
        <refentrytitle>glGetPointerv</refentrytitle>
        <manvolnum>3G</manvolnum>
    </refmeta>
    <refnamediv>
        <refname>glGetPointerv</refname>
        <refpurpose>return the address of the specified pointer</refpurpose>
    </refnamediv>
    <refsynopsisdiv><title>C Specification</title>
        <funcsynopsis>
            <funcprototype>
                <funcdef>void <function>glGetPointerv</function></funcdef>
                <paramdef>GLenum <parameter>pname</parameter></paramdef>
                <paramdef>GLvoid ** <parameter>params</parameter></paramdef>
            </funcprototype>
        </funcsynopsis>
    </refsynopsisdiv>
    <!-- eqn: ignoring delim $$ -->
    <refsect1 id="parameters"><title>Parameters</title>
        <variablelist>
        <varlistentry>
            <term><parameter>pname</parameter></term>
            <listitem>
                <para>
                    Specifies the array or buffer pointer to be returned.
                    Symbolic constants
                    <constant>GL_COLOR_ARRAY_POINTER</constant>,
                    <constant>GL_EDGE_FLAG_ARRAY_POINTER</constant>,
                    <constant>GL_FOG_COORD_ARRAY_POINTER</constant>,
                    <constant>GL_FEEDBACK_BUFFER_POINTER</constant>,
                    <constant>GL_INDEX_ARRAY_POINTER</constant>,
                    <constant>GL_NORMAL_ARRAY_POINTER</constant>,
                    <constant>GL_SECONDARY_COLOR_ARRAY_POINTER</constant>,
                    <constant>GL_SELECTION_BUFFER_POINTER</constant>,
                    <constant>GL_TEXTURE_COORD_ARRAY_POINTER</constant>,
                    or
                    <constant>GL_VERTEX_ARRAY_POINTER</constant>
                    are accepted.
                </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>glGetPointerv</function> returns pointer information. <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>
            For all <parameter>pname</parameter> arguments except <constant>GL_FEEDBACK_BUFFER_POINTER</constant> and <constant>GL_SELECTION_BUFFER_POINTER</constant>,
            if a non-zero named buffer object was bound to the <constant>GL_ARRAY_BUFFER</constant> target 
            (see <citerefentry><refentrytitle>glBindBuffer</refentrytitle></citerefentry>) when the desired pointer was previously
            specified, the pointer returned is a byte offset into the buffer object's data store.
            Buffer objects are only available in OpenGL versions 1.5 and greater.
        </para>
    </refsect1>
    <refsect1 id="notes"><title>Notes</title>
        <para>
            <function>glGetPointerv</function> is available only if the GL version is 1.1 or greater.
        </para>
        <para>
            <constant>GL_FOG_COORD_ARRAY_POINTER</constant> and <constant>GL_SECONDARY_COLOR_ARRAY_POINTER</constant> 
            are available only if the GL version is 1.4 or greater.
        </para>
        <para>
            The pointers are all client-side state.
        </para>
        <para>
            The initial value for each pointer is 0.
        </para>
        <para>
            For OpenGL versions 1.3 and greater, or when the <code>ARB_multitexture</code>
            extension is supported, querying the <constant>GL_TEXTURE_COORD_ARRAY_POINTER</constant>
            returns the value for the active client texture unit.
        </para>
    </refsect1>
    <refsect1 id="errors"><title>Errors</title>
        <para>
            <constant>GL_INVALID_ENUM</constant> is generated if <parameter>pname</parameter> is not an accepted value.
        </para>
    </refsect1>
    <refsect1 id="seealso"><title>See Also</title>
        <para>
            <citerefentry><refentrytitle>glBindBuffer</refentrytitle></citerefentry>,
            <citerefentry><refentrytitle>glClientActiveTexture</refentrytitle></citerefentry>,
            <citerefentry><refentrytitle>glColorPointer</refentrytitle></citerefentry>,
            <citerefentry><refentrytitle>glEdgeFlagPointer</refentrytitle></citerefentry>,
            <citerefentry><refentrytitle>glFogCoordPointer</refentrytitle></citerefentry>,
            <citerefentry><refentrytitle>glFeedbackBuffer</refentrytitle></citerefentry>,
            <citerefentry><refentrytitle>glGetVertexAttribPointerv</refentrytitle></citerefentry>,
            <citerefentry><refentrytitle>glIndexPointer</refentrytitle></citerefentry>,
            <citerefentry><refentrytitle>glNormalPointer</refentrytitle></citerefentry>,
            <citerefentry><refentrytitle>glSecondaryColorPointer</refentrytitle></citerefentry>,
            <citerefentry><refentrytitle>glSelectBuffer</refentrytitle></citerefentry>,
            <citerefentry><refentrytitle>glTexCoordPointer</refentrytitle></citerefentry>,
            <citerefentry><refentrytitle>glVertexAttribPointer</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>
