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| <title xmlns:xlink="http://www.w3.org/1999/xlink">eglGetProcAddress - EGL Reference Pages</title> |
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| <header/> |
| <div class="refentry" id="eglGetProcAddress"> |
| <div class="titlepage"/> |
| <div class="refnamediv"> |
| <h2>Name</h2> |
| <p>eglGetProcAddress — |
| return a <abbr class="acronym">GL</abbr> or an <abbr class="acronym">EGL</abbr> |
| extension function |
| </p> |
| </div> |
| <div class="refsynopsisdiv"> |
| <h2>C Specification</h2> |
| <div class="funcsynopsis"> |
| <table style="border: 0; cellspacing: 0; cellpadding: 0;" class="funcprototype-table"> |
| <tr> |
| <td> |
| <code class="funcdef">void (* <strong class="fsfunc">eglGetProcAddress</strong>)()(</code> |
| </td> |
| <td>char const * <var class="pdparam">procname</var><code>)</code>;</td> |
| </tr> |
| </table> |
| <div class="funcprototype-spacer"> </div> |
| </div> |
| </div> |
| <div class="refsect1" id="parameters"> |
| <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" id="description"> |
| <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 <abbr class="acronym">EGL</abbr> 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.xhtml"><span class="citerefentry"><span class="refentrytitle">glGetString</span></span></a>(<code class="constant">GL_EXTENSIONS</code>) or |
| <a class="citerefentry" href="eglQueryString.xhtml"><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 |
| <abbr class="acronym">GL</abbr> and <abbr class="acronym">EGL</abbr> extension functions. |
| </p> |
| </div> |
| <div class="refsect1" id="seealso"> |
| <h2>See Also</h2> |
| <p> |
| <a class="citerefentry" href="glGetString.xhtml"><span class="citerefentry"><span class="refentrytitle">glGetString</span></span></a>, |
| <a class="citerefentry" href="eglQueryString.xhtml"><span class="citerefentry"><span class="refentrytitle">eglQueryString</span></span></a> </p> |
| </div> |
| <p> |
| </p> |
| <div class="refsect3" id="copyright"> |
| <img src="KhronosLogo.jpg"/> |
| <p> |
| Copyright © 2003-2014 The Khronos Group Inc. |
| Permission is hereby granted, free of charge, to any person obtaining a |
| 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 |
| the condition that this copyright notice and permission notice shall be included |
| in all copies or substantial portions of the Materials. |
| </p> |
| </div> |
| <p> |
| </p> |
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