
<refentry id="glXQueryExtensionsString">
    <refmeta>
        <refmetainfo>
            <copyright>
                <year>1991-2006</year>
                <holder>Silicon Graphics, Inc.</holder>
            </copyright>
        </refmetainfo>
        <refentrytitle>glXQueryExtensionsString</refentrytitle>
        <manvolnum>3G</manvolnum>
    </refmeta>
    <refnamediv>
        <refname>glXQueryExtensionsString</refname>
        <refpurpose>return list of supported extensions</refpurpose>
    </refnamediv>
    <refsynopsisdiv><title>C Specification</title>
        <funcsynopsis>
            <funcprototype>
                <funcdef>const char * <function>glXQueryExtensionsString</function></funcdef>
                <paramdef>Display * <parameter>dpy</parameter></paramdef>
                <paramdef>int <parameter>screen</parameter></paramdef>
            </funcprototype>
        </funcsynopsis>
    </refsynopsisdiv>
    <!-- eqn: ignoring delim $$ -->
    <refsect1 id="parameters"><title>Parameters</title>
        <variablelist>
        <varlistentry>
            <term><parameter>dpy</parameter></term>
            <listitem>
                <para>
                    Specifies the connection to the X server.
                </para>
            </listitem>
        </varlistentry>
        <varlistentry>
            <term><parameter>screen</parameter></term>
            <listitem>
                <para>
                    Specifies the screen number.
                </para>
            </listitem>
        </varlistentry>
        </variablelist>
    </refsect1>
    <refsect1 id="description"><title>Description</title>
        <para>
            <function>glXQueryExtensionsString</function>  returns a pointer to a string describing
            which GLX extensions are supported on the connection. The string
            is null-terminated and contains a space-separated list of 
            extension names.  (The extension names themselves never contain 
            spaces.) If there are no extensions to GLX, then the empty string is 
            returned. 
        </para>
    </refsect1>
    <refsect1 id="notes"><title>Notes</title>
        <para>
            <function>glXQueryExtensionsString</function> is available only if the GLX version is 1.1 or greater.
        </para>
        <para>
            <function>glXQueryExtensionsString</function> only returns information about GLX extensions. Call 
            <citerefentry><refentrytitle>glGetString</refentrytitle></citerefentry> to get a list of GL extensions.
        </para>
    </refsect1>
    <refsect1 id="seealso"><title>See Also</title>
        <para>
            <citerefentry><refentrytitle>glGetString</refentrytitle></citerefentry>,
            <citerefentry><refentrytitle>glXQueryVersion</refentrytitle></citerefentry>, 
            <citerefentry><refentrytitle>glXQueryServerString</refentrytitle></citerefentry>,
            <citerefentry><refentrytitle>glXGetClientString</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>
