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215</style>
216    <title>eglReleaseTexImage</title>
217    <meta name="generator" content="DocBook XSL Stylesheets V1.78.1" />
218  </head>
219  <body>
220    <div class="refentry">
221      <a id="eglReleaseTexImage"></a>
222      <div class="titlepage"></div>
223      <div xmlns="" class="refnamediv">
224        <h1>eglReleaseTexImage</h1>
225        <p>
226            Releases a color buffer that is being used as a texture
227        </p>
228      </div>
229      <div class="refsynopsisdiv">
230        <h2>C Specification</h2>
231        <div class="funcsynopsis">
232          <table xmlns="" border="0" summary="Function synopsis" cellspacing="0" cellpadding="0">
233            <tr valign="bottom">
234              <td>
235                <code xmlns="http://www.w3.org/1999/xhtml" class="funcdef">EGLBoolean <strong class="fsfunc">eglReleaseTexImage</strong>(</code>
236                <td>EGLDisplay  <var xmlns="http://www.w3.org/1999/xhtml" class="pdparam">display</var>, </td>
237              </td>
238            </tr>
239            <tr valign="top">
240              <td> </td>
241              <td>EGLSurface  <var xmlns="http://www.w3.org/1999/xhtml" class="pdparam">surface</var>, </td>
242            </tr>
243            <tr valign="top">
244              <td> </td>
245              <td>EGLint  <var xmlns="http://www.w3.org/1999/xhtml" class="pdparam">buffer</var><code>)</code></td>
246            </tr>
247          </table>
248        </div>
249      </div>
250      <div class="refsect1">
251        <a id="parameters"></a>
252        <h2>Parameters</h2>
253        <div class="variablelist">
254          <dl class="variablelist">
255            <dt>
256              <span class="term">
257                <em class="parameter">
258                  <code>display</code>
259                </em>
260              </span>
261            </dt>
262            <dd>
263              <p>Specifies the EGL display connection.</p>
264            </dd>
265            <dt>
266              <span class="term">
267                <em class="parameter">
268                  <code>surface</code>
269                </em>
270              </span>
271            </dt>
272            <dd>
273              <p>
274                        Specifies the EGL surface.
275                    </p>
276            </dd>
277            <dt>
278              <span class="term">
279                <em class="parameter">
280                  <code>buffer</code>
281                </em>
282              </span>
283            </dt>
284            <dd>
285              <p>Specifies the texture image data.</p>
286            </dd>
287          </dl>
288        </div>
289      </div>
290      <div class="refsect1">
291        <a id="description"></a>
292        <h2>Description</h2>
293        <p>
294            The specified color buffer is released back to the surface. The surface is made
295            available for reading and writing when it no longer has any color buffers bound as
296            textures.
297        </p>
298      </div>
299      <div class="refsect1">
300        <a id="notes"></a>
301        <h2>Notes</h2>
302        <p>
303            If the specified color buffer is no longer bound to a texture (e.g., because the
304            texture object was deleted) then eglReleaseTexImage has no effect. No error is
305            generated.
306        </p>
307        <p>
308            The contents of the color buffer are undefined when it is first released. In particular,
309            there is no guarantee that the texture image is still present. However, the contents of
310            other color buffers are unaffected by this call. Also, the contents of the depth and stencil buffers
311            are not affected by <a class="citerefentry" href="eglBindTexImage.html"><span class="citerefentry"><span class="refentrytitle">eglBindTexImage</span></span></a>
312            and <code class="function">eglReleaseTexImage</code>.
313        </p>
314        <p>
315            After a color buffer is released from a texture (either explicitly by calling
316            <code class="function">eglReleaseTexImage</code> or implicitly by calling a routine such as
317            <a class="citerefentry" href="glTexImage2D.html"><span class="citerefentry"><span class="refentrytitle">glTexImage2D</span></span></a>),
318            all texture images that were defined by the color buffer become <code class="constant">NULL</code>
319            (it is as if <a class="citerefentry" href="glTexImage.html"><span class="citerefentry"><span class="refentrytitle">glTexImage</span></span></a> was called with an image of zero width).
320        </p>
321      </div>
322      <div class="refsect1">
323        <a id="errors"></a>
324        <h2>Errors</h2>
325        <p>
326            <code class="constant">EGL_BAD_MATCH</code> is generated if the
327            surface attribute <code class="constant">EGL_TEXTURE_FORMAT</code> is
328            set to <code class="constant">EGL_NO_TEXTURE</code>.
329        </p>
330        <p>
331            <code class="constant">EGL_BAD_MATCH</code> is generated if
332            <em class="parameter"><code>buffer</code></em> is not a valid buffer
333            (currently only <code class="constant">EGL_BACK_BUFFER</code> may be
334            specified).
335        </p>
336        <p>
337            <code class="constant">EGL_BAD_SURFACE</code> is generated if
338            <em class="parameter"><code>surface</code></em> is not an EGL surface, or is
339            not a bound pbuffer surface.
340        </p>
341      </div>
342      <div class="refsect1">
343        <a id="seealso"></a>
344        <h2>See Also</h2>
345        <p>
346            <a class="citerefentry" href="eglBindTexImage.html"><span class="citerefentry"><span class="refentrytitle">eglBindTexImage</span></span></a>
347        </p>
348      </div>
349      <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>
350Copyright © 2003-2014 The Khronos Group Inc.
351Permission is hereby granted, free of charge, to any person obtaining a
352copy of this software and/or associated documentation files (the
353"Materials"), to deal in the Materials without restriction, including
354without limitation the rights to use, copy, modify, merge, publish,
355distribute, sublicense, and/or sell copies of the Materials, and to
356permit persons to whom the Materials are furnished to do so, subject to
357the condition that this copyright notice and permission notice shall be included
358in all copies or substantial portions of the Materials.
359</div>
360    </div>
361  </body>
362</html>
363