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<?xml-stylesheet type="text/xsl" href="mathml.xsl"?><html xmlns="http://www.w3.org/1999/xhtml" xmlns:pref="http://www.w3.org/2002/Math/preference" pref:renderer="mathplayer-dl"><head><meta http-equiv="Content-Type" content="text/html; charset=UTF-8" /><title>glXGetVisualFromFBConfig</title><meta name="generator" content="DocBook XSL Stylesheets V1.73.2" /></head><body><div class="refentry" lang="en" xml:lang="en"><a id="glXGetVisualFromFBConfig"></a><div class="titlepage"></div><div class="refnamediv"><h2>Name</h2><p>glXGetVisualFromFBConfig — return visual that is associated with the frame buffer configuration</p></div><div class="refsynopsisdiv"><h2>C Specification</h2><div class="funcsynopsis"><table border="0" summary="Function synopsis" cellspacing="0" cellpadding="0"><tr><td><code class="funcdef">XVisualInfo * <b class="fsfunc">glXGetVisualFromFBConfig</b>(</code></td><td>Display *  </td><td><var class="pdparam">dpy</var>, </td></tr><tr><td> </td><td>GLXFBConfig  </td><td><var class="pdparam">config</var><code>)</code>;</td></tr></table></div></div><div class="refsect1" lang="en" xml:lang="en"><a id="parameters"></a><h2>Parameters</h2><div class="variablelist"><dl><dt><span class="term"><em class="parameter"><code>dpy</code></em></span></dt><dd><p>
                    Specifies the connection to the X server. 
                </p></dd><dt><span class="term"><em class="parameter"><code>config</code></em></span></dt><dd><p>
                    Specifies the GLX frame buffer configuration.
                </p></dd></dl></div></div><div class="refsect1" lang="en" xml:lang="en"><a id="description"></a><h2>Description</h2><p>
            If <em class="parameter"><code>config</code></em> is a valid GLX frame buffer configuration
            and it has an associated X Visual, then
            information describing that visual is returned; otherwise <code class="constant">NULL</code>
            is returned. Use <code class="function">XFree</code> to free the data returned.
        </p></div><div class="refsect1" lang="en" xml:lang="en"><a id="notes"></a><h2>Notes</h2><p>
            <code class="function">glXGetVisualFromFBConfig</code> is available only if the GLX version is 1.3 or greater.
        </p><p>
            If the GLX version is 1.1 or 1.0, the GL version must be 1.0.
            If the GLX version is 1.2, then the GL version must be 1.1.
            If the GLX version is 1.3, then the GL version must be 1.2.
        </p><p>
            <code class="constant">XVisualInfo</code> is defined in <span class="emphasis"><em>Xutil.h.</em></span>
            It is a structure that includes <span class="emphasis"><em>visual</em></span>, <span class="emphasis"><em>visualID</em></span>, 
            <span class="emphasis"><em>screen</em></span>, and <span class="emphasis"><em>depth</em></span> elements.
        </p></div><div class="refsect1" lang="en" xml:lang="en"><a id="errors"></a><h2>Errors</h2><p>
            Returns <code class="constant">NULL</code> if <em class="parameter"><code>config</code></em> is not a valid GLXFBConfig.
        </p></div><div class="refsect1" lang="en" xml:lang="en"><a id="seealso"></a><h2>See Also</h2><p>
            <a class="citerefentry" href="glXGetFBConfigAttrib.xml"><span class="citerefentry"><span class="refentrytitle">glXGetFBConfigAttrib</span></span></a>,
            <a class="citerefentry" href="glXChooseFBConfig.xml"><span class="citerefentry"><span class="refentrytitle">glXChooseFBConfig</span></span></a>,
            <a class="citerefentry" href="glXChooseVisual.xml"><span class="citerefentry"><span class="refentrytitle">glXChooseVisual</span></span></a>,
            <a class="citerefentry" href="glXGetConfig.xml"><span class="citerefentry"><span class="refentrytitle">glXGetConfig</span></span></a>
        </p></div><div class="refsect1" lang="en" xml:lang="en"><a id="Copyright"></a><h2>Copyright</h2><p>
            Copyright <span class="trademark"></span>© 1991-2006
            Silicon Graphics, Inc. This document is licensed under the SGI
            Free Software B License. For details, see
            <a class="ulink" href="http://oss.sgi.com/projects/FreeB/" target="_top">http://oss.sgi.com/projects/FreeB/</a>.
        </p></div></div></body></html>
