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<title>eglGetProcAddress</title>
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<div class="refentry">
<a id="eglGetProcAddress"></a>
<div class="titlepage"></div>
<div xmlns="" class="refnamediv">
<h1>eglGetProcAddress</h1>
<p>
return a <acronym xmlns="http://www.w3.org/1999/xhtml" class="acronym">GL</acronym> or an <acronym xmlns="http://www.w3.org/1999/xhtml" class="acronym">EGL</acronym>
extension function
</p>
</div>
<div class="refsynopsisdiv">
<h2>C Specification</h2>
<div class="funcsynopsis">
<table xmlns="" border="0" summary="Function synopsis" cellspacing="0" cellpadding="0">
<tr valign="bottom">
<td>
<code xmlns="http://www.w3.org/1999/xhtml" class="funcdef">void (* <strong class="fsfunc">eglGetProcAddress</strong>)()(</code>
<td>char const *  <var xmlns="http://www.w3.org/1999/xhtml" class="pdparam">procname</var><code>)</code></td>
</td>
</tr>
</table>
</div>
</div>
<div class="refsect1">
<a id="parameters"></a>
<h2>Parameters</h2>
<div class="variablelist">
<dl class="variablelist">
<dt>
<span class="term">
<em class="parameter">
<code>procname</code>
</em>
</span>
</dt>
<dd>
<p>
Specifies the name of the function to return.
</p>
</dd>
</dl>
</div>
</div>
<div class="refsect1">
<a id="description"></a>
<h2>Description</h2>
<p>
<code class="function">eglGetProcAddress</code> returns the address of
the extension function named by <em class="parameter"><code>procname</code></em>.
<em class="parameter"><code>procname</code></em>
must be a null-terminated string. The pointer returned
should be cast to a function pointer type matching the extension
function's definition in that extension specification. A return value
of <code class="constant">NULL</code> indicates that the specific
function does not exist for the <acronym class="acronym">EGL</acronym> implementation.
</p>
<p>
A non-<code class="constant">NULL</code> return value does not guarantee
that an extension function is actually supported at runtime. The client
must also query
<a class="citerefentry" href="glGetString.html"><span class="citerefentry"><span class="refentrytitle">glGetString</span></span></a>(<code class="constant">GL_EXTENSIONS</code>) or
<a class="citerefentry" href="eglQueryString.html"><span class="citerefentry"><span class="refentrytitle">eglQueryString</span></span></a>(<em class="parameter"><code>display</code></em>,
<code class="constant">EGL_EXTENSIONS</code>) to determine if an
extension is supported by a particular context or display.
</p>
<p>
Function pointers returned by
<code class="function">eglGetProcAddress</code> are independent of the
display and the currently bound context and may be used by any context
which supports the extension.
</p>
<p>
<code class="function">eglGetProcAddress</code> may be queried for all
<acronym class="acronym">GL</acronym> and <acronym class="acronym">EGL</acronym> extension functions.
</p>
</div>
<div class="refsect1">
<a id="seealso"></a>
<h2>See Also</h2>
<p>
<a class="citerefentry" href="glGetString.html"><span class="citerefentry"><span class="refentrytitle">glGetString</span></span></a>,
<a class="citerefentry" href="eglQueryString.html"><span class="citerefentry"><span class="refentrytitle">eglQueryString</span></span></a> </p>
</div>
<div xmlns="" class="refsect3" lang="en" xml:lang="en"><a xmlns="http://www.w3.org/1999/xhtml" id="Copyright"></a><h4 xmlns="http://www.w3.org/1999/xhtml"></h4><img xmlns="http://www.w3.org/1999/xhtml" src="KhronosLogo.jpg" /><p xmlns="http://www.w3.org/1999/xhtml"></p>
Copyright © 2003-2014 The Khronos Group Inc.
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copy of this software and/or associated documentation files (the
"Materials"), to deal in the Materials without restriction, including
without limitation the rights to use, copy, modify, merge, publish,
distribute, sublicense, and/or sell copies of the Materials, and to
permit persons to whom the Materials are furnished to do so, subject to
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