102f4aeb0Sopenharmony_ci<?xml version="1.0" encoding="UTF-8" standalone="no"?> 202f4aeb0Sopenharmony_ci<!DOCTYPE html><html xmlns="http://www.w3.org/1999/xhtml"> 302f4aeb0Sopenharmony_ci <head> 402f4aeb0Sopenharmony_ci <title xmlns:xlink="http://www.w3.org/1999/xlink">eglSwapInterval - EGL Reference Pages</title> 502f4aeb0Sopenharmony_ci <link rel="stylesheet" type="text/css" href="khronos-man.css"/> 602f4aeb0Sopenharmony_ci <meta name="generator" content="DocBook XSL Stylesheets V1.79.1"/> 702f4aeb0Sopenharmony_ci </head> 802f4aeb0Sopenharmony_ci <body> 902f4aeb0Sopenharmony_ci <header/> 1002f4aeb0Sopenharmony_ci <div class="refentry" id="eglSwapInterval"> 1102f4aeb0Sopenharmony_ci <div class="titlepage"/> 1202f4aeb0Sopenharmony_ci <div class="refnamediv"> 1302f4aeb0Sopenharmony_ci <h2>Name</h2> 1402f4aeb0Sopenharmony_ci <p>eglSwapInterval — 1502f4aeb0Sopenharmony_ci specifies the minimum number of video frame periods 1602f4aeb0Sopenharmony_ci per buffer swap for the window associated with the current context. 1702f4aeb0Sopenharmony_ci </p> 1802f4aeb0Sopenharmony_ci </div> 1902f4aeb0Sopenharmony_ci <div class="refsynopsisdiv"> 2002f4aeb0Sopenharmony_ci <h2>C Specification</h2> 2102f4aeb0Sopenharmony_ci <div class="funcsynopsis"> 2202f4aeb0Sopenharmony_ci <table style="border: 0; cellspacing: 0; cellpadding: 0;" class="funcprototype-table"> 2302f4aeb0Sopenharmony_ci <tr> 2402f4aeb0Sopenharmony_ci <td> 2502f4aeb0Sopenharmony_ci <code class="funcdef">EGLBoolean <strong class="fsfunc">eglSwapInterval</strong>(</code> 2602f4aeb0Sopenharmony_ci </td> 2702f4aeb0Sopenharmony_ci <td>EGLDisplay <var class="pdparam">display</var>, </td> 2802f4aeb0Sopenharmony_ci </tr> 2902f4aeb0Sopenharmony_ci <tr> 3002f4aeb0Sopenharmony_ci <td> </td> 3102f4aeb0Sopenharmony_ci <td>EGLint <var class="pdparam">interval</var><code>)</code>;</td> 3202f4aeb0Sopenharmony_ci </tr> 3302f4aeb0Sopenharmony_ci </table> 3402f4aeb0Sopenharmony_ci <div class="funcprototype-spacer"> </div> 3502f4aeb0Sopenharmony_ci </div> 3602f4aeb0Sopenharmony_ci </div> 3702f4aeb0Sopenharmony_ci <div class="refsect1" id="parameters"> 3802f4aeb0Sopenharmony_ci <h2>Parameters</h2> 3902f4aeb0Sopenharmony_ci <div class="variablelist"> 4002f4aeb0Sopenharmony_ci <dl class="variablelist"> 4102f4aeb0Sopenharmony_ci <dt> 4202f4aeb0Sopenharmony_ci <span class="term"> 4302f4aeb0Sopenharmony_ci <em class="parameter"> 4402f4aeb0Sopenharmony_ci <code>display</code> 4502f4aeb0Sopenharmony_ci </em> 4602f4aeb0Sopenharmony_ci </span> 4702f4aeb0Sopenharmony_ci </dt> 4802f4aeb0Sopenharmony_ci <dd> 4902f4aeb0Sopenharmony_ci <p> 5002f4aeb0Sopenharmony_ci Specifies the EGL display connection. 5102f4aeb0Sopenharmony_ci </p> 5202f4aeb0Sopenharmony_ci </dd> 5302f4aeb0Sopenharmony_ci <dt> 5402f4aeb0Sopenharmony_ci <span class="term"> 5502f4aeb0Sopenharmony_ci <em class="parameter"> 5602f4aeb0Sopenharmony_ci <code>interval</code> 5702f4aeb0Sopenharmony_ci </em> 5802f4aeb0Sopenharmony_ci </span> 5902f4aeb0Sopenharmony_ci </dt> 6002f4aeb0Sopenharmony_ci <dd> 6102f4aeb0Sopenharmony_ci <p> 6202f4aeb0Sopenharmony_ci Specifies the minimum number of video frames that are displayed before 6302f4aeb0Sopenharmony_ci a buffer swap will occur. 6402f4aeb0Sopenharmony_ci </p> 6502f4aeb0Sopenharmony_ci </dd> 6602f4aeb0Sopenharmony_ci </dl> 6702f4aeb0Sopenharmony_ci </div> 6802f4aeb0Sopenharmony_ci </div> 6902f4aeb0Sopenharmony_ci <div class="refsect1" id="description"> 7002f4aeb0Sopenharmony_ci <h2>Description</h2> 7102f4aeb0Sopenharmony_ci <p> 7202f4aeb0Sopenharmony_ci The interval takes effect when <a class="citerefentry" href="eglSwapBuffers.xhtml"><span class="citerefentry"><span class="refentrytitle">eglSwapBuffers</span></span></a> is 7302f4aeb0Sopenharmony_ci first called subsequent to the <code class="function">eglSwapInterval</code> call. 7402f4aeb0Sopenharmony_ci </p> 7502f4aeb0Sopenharmony_ci <p> 7602f4aeb0Sopenharmony_ci The <em class="parameter"><code>interval</code></em> specified by the function applies to the draw surface 7702f4aeb0Sopenharmony_ci bound to the context that is current on the calling thread. 7802f4aeb0Sopenharmony_ci </p> 7902f4aeb0Sopenharmony_ci <p> 8002f4aeb0Sopenharmony_ci 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 8102f4aeb0Sopenharmony_ci video frame, and the swap happens as soon as the render is complete. interval 8202f4aeb0Sopenharmony_ci is silently clamped to minimum and maximum implementation dependent 8302f4aeb0Sopenharmony_ci valuesbefore being stored; these values are defined by <span class="type">EGLConfig</span> attributes 8402f4aeb0Sopenharmony_ci <code class="constant">EGL_MIN_SWAP_INTERVAL</code> and <code class="constant">EGL_MAX_SWAP_INTERVAL</code> respectively. 8502f4aeb0Sopenharmony_ci </p> 8602f4aeb0Sopenharmony_ci </div> 8702f4aeb0Sopenharmony_ci <div class="refsect1" id="notes"> 8802f4aeb0Sopenharmony_ci <h2>Notes</h2> 8902f4aeb0Sopenharmony_ci <p> 9002f4aeb0Sopenharmony_ci The swap interval has no effect on <a class="citerefentry" href="eglCopyBuffers.xhtml"><span class="citerefentry"><span class="refentrytitle">eglCopyBuffers</span></span></a>. 9102f4aeb0Sopenharmony_ci </p> 9202f4aeb0Sopenharmony_ci <p> 9302f4aeb0Sopenharmony_ci The default swap interval is 1. 9402f4aeb0Sopenharmony_ci </p> 9502f4aeb0Sopenharmony_ci </div> 9602f4aeb0Sopenharmony_ci <div class="refsect1" id="errors"> 9702f4aeb0Sopenharmony_ci <h2>Errors</h2> 9802f4aeb0Sopenharmony_ci <p> 9902f4aeb0Sopenharmony_ci <code class="constant">EGL_FALSE</code> is returned on failure, <code class="constant">EGL_TRUE</code> otherwise. 10002f4aeb0Sopenharmony_ci </p> 10102f4aeb0Sopenharmony_ci <p> 10202f4aeb0Sopenharmony_ci <code class="constant">EGL_BAD_CONTEXT</code> is generated if there is no current context 10302f4aeb0Sopenharmony_ci on the calling thread. 10402f4aeb0Sopenharmony_ci </p> 10502f4aeb0Sopenharmony_ci <p> 10602f4aeb0Sopenharmony_ci <code class="constant">EGL_BAD_SURFACE</code> is generated if there is no surface 10702f4aeb0Sopenharmony_ci bound to the current context. 10802f4aeb0Sopenharmony_ci </p> 10902f4aeb0Sopenharmony_ci </div> 11002f4aeb0Sopenharmony_ci <div class="refsect1" id="seealso"> 11102f4aeb0Sopenharmony_ci <h2>See Also</h2> 11202f4aeb0Sopenharmony_ci <p> 11302f4aeb0Sopenharmony_ci <a class="citerefentry" href="eglSwapBuffers.xhtml"><span class="citerefentry"><span class="refentrytitle">eglSwapBuffers</span></span></a> 11402f4aeb0Sopenharmony_ci </p> 11502f4aeb0Sopenharmony_ci </div> 11602f4aeb0Sopenharmony_ci <p> 11702f4aeb0Sopenharmony_ci </p> 11802f4aeb0Sopenharmony_ci <div class="refsect3" id="copyright"> 11902f4aeb0Sopenharmony_ci <img src="KhronosLogo.jpg"/> 12002f4aeb0Sopenharmony_ci <p> 12102f4aeb0Sopenharmony_ci Copyright © 2003-2014 The Khronos Group Inc. 12202f4aeb0Sopenharmony_ci Permission is hereby granted, free of charge, to any person obtaining a 12302f4aeb0Sopenharmony_ci copy of this software and/or associated documentation files (the 12402f4aeb0Sopenharmony_ci "Materials"), to deal in the Materials without restriction, including 12502f4aeb0Sopenharmony_ci without limitation the rights to use, copy, modify, merge, publish, 12602f4aeb0Sopenharmony_ci distribute, sublicense, and/or sell copies of the Materials, and to 12702f4aeb0Sopenharmony_ci permit persons to whom the Materials are furnished to do so, subject to 12802f4aeb0Sopenharmony_ci the condition that this copyright notice and permission notice shall be included 12902f4aeb0Sopenharmony_ci in all copies or substantial portions of the Materials. 13002f4aeb0Sopenharmony_ci </p> 13102f4aeb0Sopenharmony_ci </div> 13202f4aeb0Sopenharmony_ci <p> 13302f4aeb0Sopenharmony_ci</p> 13402f4aeb0Sopenharmony_ci </div> 13502f4aeb0Sopenharmony_ci <footer/> 13602f4aeb0Sopenharmony_ci </body> 13702f4aeb0Sopenharmony_ci</html> 138
