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">eglQueryString - 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="eglQueryString"> 1102f4aeb0Sopenharmony_ci <div class="titlepage"/> 1202f4aeb0Sopenharmony_ci <div class="refnamediv"> 1302f4aeb0Sopenharmony_ci <h2>Name</h2> 1402f4aeb0Sopenharmony_ci <p>eglQueryString — 1502f4aeb0Sopenharmony_ci return a string describing properties of the EGL client or of an 1602f4aeb0Sopenharmony_ci <abbr class="acronym">EGL</abbr> display connection 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">char const * <strong class="fsfunc">eglQueryString</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">name</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>name</code> 5702f4aeb0Sopenharmony_ci </em> 5802f4aeb0Sopenharmony_ci </span> 5902f4aeb0Sopenharmony_ci </dt> 6002f4aeb0Sopenharmony_ci <dd> 6102f4aeb0Sopenharmony_ci <p> 6202f4aeb0Sopenharmony_ci Specifies a symbolic constant, one of 6302f4aeb0Sopenharmony_ci <code class="constant">EGL_CLIENT_APIS</code>, 6402f4aeb0Sopenharmony_ci <code class="constant">EGL_VENDOR</code>, 6502f4aeb0Sopenharmony_ci <code class="constant">EGL_VERSION</code>, or 6602f4aeb0Sopenharmony_ci <code class="constant">EGL_EXTENSIONS</code>. 6702f4aeb0Sopenharmony_ci </p> 6802f4aeb0Sopenharmony_ci </dd> 6902f4aeb0Sopenharmony_ci </dl> 7002f4aeb0Sopenharmony_ci </div> 7102f4aeb0Sopenharmony_ci </div> 7202f4aeb0Sopenharmony_ci <div class="refsect1" id="description"> 7302f4aeb0Sopenharmony_ci <h2>Description</h2> 7402f4aeb0Sopenharmony_ci <p> 7502f4aeb0Sopenharmony_ci <code class="function">eglQueryString</code> returns a pointer to a 7602f4aeb0Sopenharmony_ci static, zero-terminated string describing properties of the EGL 7702f4aeb0Sopenharmony_ci client or of an EGL display connection. 7802f4aeb0Sopenharmony_ci <em class="parameter"><code>name</code></em> may be one of the following: 7902f4aeb0Sopenharmony_ci </p> 8002f4aeb0Sopenharmony_ci <div class="variablelist"> 8102f4aeb0Sopenharmony_ci <dl class="variablelist"> 8202f4aeb0Sopenharmony_ci <dt> 8302f4aeb0Sopenharmony_ci <span class="term"> 8402f4aeb0Sopenharmony_ci <code class="constant">EGL_CLIENT_APIS</code> 8502f4aeb0Sopenharmony_ci </span> 8602f4aeb0Sopenharmony_ci </dt> 8702f4aeb0Sopenharmony_ci <dd> 8802f4aeb0Sopenharmony_ci <p> 8902f4aeb0Sopenharmony_ci Returns a string describing which client rendering 9002f4aeb0Sopenharmony_ci APIs are supported. The string contains a 9102f4aeb0Sopenharmony_ci space-separated list of API names. The list must 9202f4aeb0Sopenharmony_ci include at least one of <code class="code">OpenGL</code>, 9302f4aeb0Sopenharmony_ci <code class="code">OpenGL_ES</code>, or <code class="code">OpenVG</code>. 9402f4aeb0Sopenharmony_ci These strings correspond respectively to values 9502f4aeb0Sopenharmony_ci <code class="constant">EGL_OPENGL_API</code>, 9602f4aeb0Sopenharmony_ci <code class="constant">EGL_OPENGL_ES_API</code>, and 9702f4aeb0Sopenharmony_ci <code class="constant">EGL_OPENVG_API</code> of the 9802f4aeb0Sopenharmony_ci <a class="citerefentry" href="eglBindAPI.xhtml"><span class="citerefentry"><span class="refentrytitle">eglBindAPI</span></span></a>, 9902f4aeb0Sopenharmony_ci <em class="parameter"><code>api</code></em> argument. 10002f4aeb0Sopenharmony_ci </p> 10102f4aeb0Sopenharmony_ci </dd> 10202f4aeb0Sopenharmony_ci <dt> 10302f4aeb0Sopenharmony_ci <span class="term"> 10402f4aeb0Sopenharmony_ci <code class="constant">EGL_VENDOR</code> 10502f4aeb0Sopenharmony_ci </span> 10602f4aeb0Sopenharmony_ci </dt> 10702f4aeb0Sopenharmony_ci <dd> 10802f4aeb0Sopenharmony_ci <p> 10902f4aeb0Sopenharmony_ci Returns the name of the vendor responsible for this EGL 11002f4aeb0Sopenharmony_ci implementation. The format and contents of the string 11102f4aeb0Sopenharmony_ci are implementation-dependent. 11202f4aeb0Sopenharmony_ci </p> 11302f4aeb0Sopenharmony_ci </dd> 11402f4aeb0Sopenharmony_ci <dt> 11502f4aeb0Sopenharmony_ci <span class="term"> 11602f4aeb0Sopenharmony_ci <code class="constant">EGL_VERSION</code> 11702f4aeb0Sopenharmony_ci </span> 11802f4aeb0Sopenharmony_ci </dt> 11902f4aeb0Sopenharmony_ci <dd> 12002f4aeb0Sopenharmony_ci <p> 12102f4aeb0Sopenharmony_ci Returns a version or release number. The 12202f4aeb0Sopenharmony_ci <code class="constant">EGL_VERSION</code> string is laid out 12302f4aeb0Sopenharmony_ci as follows: 12402f4aeb0Sopenharmony_ci </p> 12502f4aeb0Sopenharmony_ci <p> 12602f4aeb0Sopenharmony_ci <em class="replaceable"><code>major_version</code></em>.<em class="replaceable"><code>minor_version</code></em> 12702f4aeb0Sopenharmony_ci space 12802f4aeb0Sopenharmony_ci <em class="replaceable"><code>vendor_specific_info</code></em> 12902f4aeb0Sopenharmony_ci </p> 13002f4aeb0Sopenharmony_ci <p> 13102f4aeb0Sopenharmony_ci Both the major and minor portions of the version 13202f4aeb0Sopenharmony_ci number are numeric. Their values must match the 13302f4aeb0Sopenharmony_ci <em class="parameter"><code>major</code></em> and 13402f4aeb0Sopenharmony_ci <em class="parameter"><code>minor</code></em> values returned by 13502f4aeb0Sopenharmony_ci <a class="citerefentry" href="eglInitialize.xhtml"><span class="citerefentry"><span class="refentrytitle">eglInitialize</span></span></a>. 13602f4aeb0Sopenharmony_ci </p> 13702f4aeb0Sopenharmony_ci <p> 13802f4aeb0Sopenharmony_ci The vendor-specific information is optional; if 13902f4aeb0Sopenharmony_ci present, its format and contents are 14002f4aeb0Sopenharmony_ci implementation-specific. 14102f4aeb0Sopenharmony_ci </p> 14202f4aeb0Sopenharmony_ci </dd> 14302f4aeb0Sopenharmony_ci <dt> 14402f4aeb0Sopenharmony_ci <span class="term"> 14502f4aeb0Sopenharmony_ci <code class="constant">EGL_EXTENSIONS</code> 14602f4aeb0Sopenharmony_ci </span> 14702f4aeb0Sopenharmony_ci </dt> 14802f4aeb0Sopenharmony_ci <dd> 14902f4aeb0Sopenharmony_ci <p> 15002f4aeb0Sopenharmony_ci Returns a space separated list of supported 15102f4aeb0Sopenharmony_ci extensions to EGL. If there are no extensions, then 15202f4aeb0Sopenharmony_ci the empty string is returned. 15302f4aeb0Sopenharmony_ci </p> 15402f4aeb0Sopenharmony_ci <p> 15502f4aeb0Sopenharmony_ci If <em class="parameter"><code>display</code></em> is 15602f4aeb0Sopenharmony_ci <code class="constant">EGL_NO_DISPLAY</code>, then the 15702f4aeb0Sopenharmony_ci <code class="constant">EGL_EXTENSIONS</code> string describes 15802f4aeb0Sopenharmony_ci the set of supported <em class="firstterm">client 15902f4aeb0Sopenharmony_ci extensions</em>. If 16002f4aeb0Sopenharmony_ci <em class="parameter"><code>display</code></em> is a valid, 16102f4aeb0Sopenharmony_ci initialized display, then the 16202f4aeb0Sopenharmony_ci <code class="constant">EGL_EXTENSIONS</code> string describes 16302f4aeb0Sopenharmony_ci the set of <em class="firstterm">display extensions</em> 16402f4aeb0Sopenharmony_ci supported by that display. The set of supported 16502f4aeb0Sopenharmony_ci client extensions is disjoint from the set of 16602f4aeb0Sopenharmony_ci extensions supported by any given display. 16702f4aeb0Sopenharmony_ci </p> 16802f4aeb0Sopenharmony_ci </dd> 16902f4aeb0Sopenharmony_ci </dl> 17002f4aeb0Sopenharmony_ci </div> 17102f4aeb0Sopenharmony_ci </div> 17202f4aeb0Sopenharmony_ci <div class="refsect1" id="notes"> 17302f4aeb0Sopenharmony_ci <h2>Notes</h2> 17402f4aeb0Sopenharmony_ci <p> 17502f4aeb0Sopenharmony_ci <code class="constant">EGL_CLIENT_APIS</code> is supported only if 17602f4aeb0Sopenharmony_ci the EGL version is 1.2 or greater. 17702f4aeb0Sopenharmony_ci </p> 17802f4aeb0Sopenharmony_ci <p> 17902f4aeb0Sopenharmony_ci A <em class="parameter"><code>display</code></em> of 18002f4aeb0Sopenharmony_ci <code class="constant">EGL_NO_DISPLAY</code> is supported only if the EGL 18102f4aeb0Sopenharmony_ci version is 1.5 or greater. 18202f4aeb0Sopenharmony_ci </p> 18302f4aeb0Sopenharmony_ci </div> 18402f4aeb0Sopenharmony_ci <div class="refsect1" id="errors"> 18502f4aeb0Sopenharmony_ci <h2>Errors</h2> 18602f4aeb0Sopenharmony_ci <p> 18702f4aeb0Sopenharmony_ci <code class="constant">NULL</code> is returned on failure. 18802f4aeb0Sopenharmony_ci </p> 18902f4aeb0Sopenharmony_ci <p> 19002f4aeb0Sopenharmony_ci <code class="constant">EGL_BAD_DISPLAY</code> is generated if 19102f4aeb0Sopenharmony_ci <em class="parameter"><code>display</code></em> is not an EGL display connection, 19202f4aeb0Sopenharmony_ci unless <em class="parameter"><code>display</code></em> is 19302f4aeb0Sopenharmony_ci <code class="constant">EGL_NO_DISPLAY</code> and 19402f4aeb0Sopenharmony_ci <em class="parameter"><code>name</code></em> is 19502f4aeb0Sopenharmony_ci <code class="constant">EGL_EXTENSIONS</code>. 19602f4aeb0Sopenharmony_ci </p> 19702f4aeb0Sopenharmony_ci <p> 19802f4aeb0Sopenharmony_ci <code class="constant">EGL_NOT_INITIALIZED</code> is generated if 19902f4aeb0Sopenharmony_ci <em class="parameter"><code>display</code></em> is a valid but uninitialized 20002f4aeb0Sopenharmony_ci EGLDisplay. 20102f4aeb0Sopenharmony_ci </p> 20202f4aeb0Sopenharmony_ci <p> 20302f4aeb0Sopenharmony_ci <code class="constant">EGL_BAD_PARAMETER</code> is generated if 20402f4aeb0Sopenharmony_ci <em class="parameter"><code>name</code></em> is not an accepted value. 20502f4aeb0Sopenharmony_ci </p> 20602f4aeb0Sopenharmony_ci </div> 20702f4aeb0Sopenharmony_ci <div class="refsect1" id="seealso"> 20802f4aeb0Sopenharmony_ci <h2>See Also</h2> 20902f4aeb0Sopenharmony_ci <p> 21002f4aeb0Sopenharmony_ci <a class="citerefentry" href="eglBindAPI.xhtml"><span class="citerefentry"><span class="refentrytitle">eglBindAPI</span></span></a>, 21102f4aeb0Sopenharmony_ci <a class="citerefentry" href="eglGetDisplay.xhtml"><span class="citerefentry"><span class="refentrytitle">eglGetDisplay</span></span></a>, 21202f4aeb0Sopenharmony_ci <a class="citerefentry" href="eglInitialize.xhtml"><span class="citerefentry"><span class="refentrytitle">eglInitialize</span></span></a> 21302f4aeb0Sopenharmony_ci </p> 21402f4aeb0Sopenharmony_ci </div> 21502f4aeb0Sopenharmony_ci <p> 21602f4aeb0Sopenharmony_ci </p> 21702f4aeb0Sopenharmony_ci <div class="refsect3" id="copyright"> 21802f4aeb0Sopenharmony_ci <img src="KhronosLogo.jpg"/> 21902f4aeb0Sopenharmony_ci <p> 22002f4aeb0Sopenharmony_ci Copyright © 2003-2014 The Khronos Group Inc. 22102f4aeb0Sopenharmony_ci Permission is hereby granted, free of charge, to any person obtaining a 22202f4aeb0Sopenharmony_ci copy of this software and/or associated documentation files (the 22302f4aeb0Sopenharmony_ci "Materials"), to deal in the Materials without restriction, including 22402f4aeb0Sopenharmony_ci without limitation the rights to use, copy, modify, merge, publish, 22502f4aeb0Sopenharmony_ci distribute, sublicense, and/or sell copies of the Materials, and to 22602f4aeb0Sopenharmony_ci permit persons to whom the Materials are furnished to do so, subject to 22702f4aeb0Sopenharmony_ci the condition that this copyright notice and permission notice shall be included 22802f4aeb0Sopenharmony_ci in all copies or substantial portions of the Materials. 22902f4aeb0Sopenharmony_ci </p> 23002f4aeb0Sopenharmony_ci </div> 23102f4aeb0Sopenharmony_ci <p> 23202f4aeb0Sopenharmony_ci</p> 23302f4aeb0Sopenharmony_ci </div> 23402f4aeb0Sopenharmony_ci <footer/> 23502f4aeb0Sopenharmony_ci </body> 23602f4aeb0Sopenharmony_ci</html> 237
