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| <title>eglSwapInterval</title> |
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| <body> |
| <div class="refentry"> |
| <a id="eglSwapInterval"></a> |
| <div class="titlepage"></div> |
| <div xmlns="" class="refnamediv"> |
| <h1>eglSwapInterval</h1> |
| <p> |
| specifies the minimum number of video frame periods |
| per buffer swap for the window associated with the current context. |
| </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">EGLBoolean <strong class="fsfunc">eglSwapInterval</strong>(</code> |
| <td>EGLDisplay <var xmlns="http://www.w3.org/1999/xhtml" class="pdparam">display</var>, </td> |
| </td> |
| </tr> |
| <tr valign="top"> |
| <td> </td> |
| <td>EGLint <var xmlns="http://www.w3.org/1999/xhtml" class="pdparam">interval</var><code>)</code></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>display</code> |
| </em> |
| </span> |
| </dt> |
| <dd> |
| <p> |
| Specifies the EGL display connection. |
| </p> |
| </dd> |
| <dt> |
| <span class="term"> |
| <em class="parameter"> |
| <code>interval</code> |
| </em> |
| </span> |
| </dt> |
| <dd> |
| <p> |
| Specifies the minimum number of video frames that are displayed before |
| a buffer swap will occur. |
| </p> |
| </dd> |
| </dl> |
| </div> |
| </div> |
| <div class="refsect1"> |
| <a id="description"></a> |
| <h2>Description</h2> |
| <p> |
| The interval takes effect when <a class="citerefentry" href="eglSwapBuffers.html"><span class="citerefentry"><span class="refentrytitle">eglSwapBuffers</span></span></a> is |
| first called subsequent to the <code class="function">eglSwapInterval</code> call. |
| </p> |
| <p> |
| The <em class="parameter"><code>interval</code></em> specified by the function applies to the draw surface |
| bound to the context that is current on the calling thread. |
| </p> |
| <p> |
| If <em class="parameter"><code>interval</code></em> is set to a value of <code class="constant">0</code>, buffer swaps are not synchronized to a |
| video frame, and the swap happens as soon as the render is complete. interval |
| is silently clamped to minimum and maximum implementation dependent |
| valuesbefore being stored; these values are defined by <span class="type">EGLConfig</span> attributes |
| <code class="constant">EGL_MIN_SWAP_INTERVAL</code> and <code class="constant">EGL_MAX_SWAP_INTERVAL</code> respectively. |
| </p> |
| </div> |
| <div class="refsect1"> |
| <a id="notes"></a> |
| <h2>Notes</h2> |
| <p> |
| The swap interval has no effect on <a class="citerefentry" href="eglCopyBuffers.html"><span class="citerefentry"><span class="refentrytitle">eglCopyBuffers</span></span></a>. |
| </p> |
| <p> |
| The default swap interval is 1. |
| </p> |
| </div> |
| <div class="refsect1"> |
| <a id="errors"></a> |
| <h2>Errors</h2> |
| <p> |
| <code class="constant">EGL_FALSE</code> is returned on failure, <code class="constant">EGL_TRUE</code> otherwise. |
| </p> |
| <p> |
| <code class="constant">EGL_BAD_CONTEXT</code> is generated if there is no current context |
| on the calling thread. |
| </p> |
| <p> |
| <code class="constant">EGL_BAD_SURFACE</code> is generated if there is no surface |
| bound to the current context. |
| </p> |
| </div> |
| <div class="refsect1"> |
| <a id="seealso"></a> |
| <h2>See Also</h2> |
| <p> |
| <a class="citerefentry" href="eglSwapBuffers.html"><span class="citerefentry"><span class="refentrytitle">eglSwapBuffers</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, |
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| permit persons to whom the Materials are furnished to do so, subject to |
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