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189 } 190 191 div.refsect2 table { 192 margin-top: 0; 193 background-color: #e6e6e6; 194 width: 100%; 195 border: 0 solid #000; 196 padding: 2px; 197 font: normal 16px courier new, monospace !important; 198 } 199 200 div.refsect2 td { 201 background-color: #e6e6e6; 202 font: normal 16px courier new, monospace !important; 203 white-space:pre; 204 } 205 206 /* COPYRIGHT: This style formats the text of the copyright statement at the bottom of the page */ 207 div.refsect3 { 208 font: normal 11px verdana, sans-serif; 209 margin-top: 50px; 210 margin-bottom: 20px; 211 padding-top: 0; 212 padding-bottom: 0; 213 } 214 215</style> 216 <title>eglGetProcAddress</title> 217 <meta name="generator" content="DocBook XSL Stylesheets V1.78.1" /> 218 </head> 219 <body> 220 <div class="refentry"> 221 <a id="eglGetProcAddress"></a> 222 <div class="titlepage"></div> 223 <div xmlns="" class="refnamediv"> 224 <h1>eglGetProcAddress</h1> 225 <p> 226 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> 227 extension function 228 </p> 229 </div> 230 <div class="refsynopsisdiv"> 231 <h2>C Specification</h2> 232 <div class="funcsynopsis"> 233 <table xmlns="" border="0" summary="Function synopsis" cellspacing="0" cellpadding="0"> 234 <tr valign="bottom"> 235 <td> 236 <code xmlns="http://www.w3.org/1999/xhtml" class="funcdef">void (* <strong class="fsfunc">eglGetProcAddress</strong>)()(</code> 237 <td>char const * <var xmlns="http://www.w3.org/1999/xhtml" class="pdparam">procname</var><code>)</code></td> 238 </td> 239 </tr> 240 </table> 241 </div> 242 </div> 243 <div class="refsect1"> 244 <a id="parameters"></a> 245 <h2>Parameters</h2> 246 <div class="variablelist"> 247 <dl class="variablelist"> 248 <dt> 249 <span class="term"> 250 <em class="parameter"> 251 <code>procname</code> 252 </em> 253 </span> 254 </dt> 255 <dd> 256 <p> 257 Specifies the name of the function to return. 258 </p> 259 </dd> 260 </dl> 261 </div> 262 </div> 263 <div class="refsect1"> 264 <a id="description"></a> 265 <h2>Description</h2> 266 <p> 267 <code class="function">eglGetProcAddress</code> returns the address of 268 the extension function named by <em class="parameter"><code>procname</code></em>. 269 <em class="parameter"><code>procname</code></em> 270 must be a null-terminated string. The pointer returned 271 should be cast to a function pointer type matching the extension 272 function's definition in that extension specification. A return value 273 of <code class="constant">NULL</code> indicates that the specific 274 function does not exist for the <acronym class="acronym">EGL</acronym> implementation. 275 </p> 276 <p> 277 A non-<code class="constant">NULL</code> return value does not guarantee 278 that an extension function is actually supported at runtime. The client 279 must also query 280 <a class="citerefentry" href="glGetString.html"><span class="citerefentry"><span class="refentrytitle">glGetString</span></span></a>(<code class="constant">GL_EXTENSIONS</code>) or 281 <a class="citerefentry" href="eglQueryString.html"><span class="citerefentry"><span class="refentrytitle">eglQueryString</span></span></a>(<em class="parameter"><code>display</code></em>, 282 <code class="constant">EGL_EXTENSIONS</code>) to determine if an 283 extension is supported by a particular context or display. 284 </p> 285 <p> 286 Function pointers returned by 287 <code class="function">eglGetProcAddress</code> are independent of the 288 display and the currently bound context and may be used by any context 289 which supports the extension. 290 </p> 291 <p> 292 <code class="function">eglGetProcAddress</code> may be queried for all 293 <acronym class="acronym">GL</acronym> and <acronym class="acronym">EGL</acronym> extension functions. 294 </p> 295 </div> 296 <div class="refsect1"> 297 <a id="seealso"></a> 298 <h2>See Also</h2> 299 <p> 300 <a class="citerefentry" href="glGetString.html"><span class="citerefentry"><span class="refentrytitle">glGetString</span></span></a>, 301 <a class="citerefentry" href="eglQueryString.html"><span class="citerefentry"><span class="refentrytitle">eglQueryString</span></span></a> </p> 302 </div> 303 <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> 304Copyright © 2003-2014 The Khronos Group Inc. 305Permission is hereby granted, free of charge, to any person obtaining a 306copy of this software and/or associated documentation files (the 307"Materials"), to deal in the Materials without restriction, including 308without limitation the rights to use, copy, modify, merge, publish, 309distribute, sublicense, and/or sell copies of the Materials, and to 310permit persons to whom the Materials are furnished to do so, subject to 311the condition that this copyright notice and permission notice shall be included 312in all copies or substantial portions of the Materials. 313</div> 314 </div> 315 </body> 316</html> 317
