102f4aeb0Sopenharmony_ci<?xml version="1.0" encoding="UTF-8"?> 202f4aeb0Sopenharmony_ci<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "xhtml1-transitional.dtd"> 302f4aeb0Sopenharmony_ci<!-- saved from url=(0013)about:internet --> 402f4aeb0Sopenharmony_ci<?xml-stylesheet type="text/xsl" href="mathml.xsl"?><html xmlns="http://www.w3.org/1999/xhtml" xmlns:pref="http://www.w3.org/2002/Math/preference" xmlns:xlink="http://www.w3.org/1999/xlink" pref:renderer="mathplayer-dl"> 502f4aeb0Sopenharmony_ci <head> 602f4aeb0Sopenharmony_ci <meta http-equiv="Content-Type" content="text/html; charset=UTF-8" /> 702f4aeb0Sopenharmony_ci <style xmlns="" type="text/css"> 802f4aeb0Sopenharmony_ci /* This style sets a margin around the entire page */ 902f4aeb0Sopenharmony_ci html, body { 1002f4aeb0Sopenharmony_ci margin: 10px; 1102f4aeb0Sopenharmony_ci } 1202f4aeb0Sopenharmony_ci 1302f4aeb0Sopenharmony_ci p { 1402f4aeb0Sopenharmony_ci font: normal 16px verdana, sans-serif; 1502f4aeb0Sopenharmony_ci margin: 0; 1602f4aeb0Sopenharmony_ci padding-bottom:12px; 1702f4aeb0Sopenharmony_ci } 1802f4aeb0Sopenharmony_ci 1902f4aeb0Sopenharmony_ci h1 { 2002f4aeb0Sopenharmony_ci font: bold 25px verdana, sans-serif; 2102f4aeb0Sopenharmony_ci margin-top: 0; 2202f4aeb0Sopenharmony_ci margin-bottom: 3px; 2302f4aeb0Sopenharmony_ci padding-top: 0; 2402f4aeb0Sopenharmony_ci padding-bottom: 0; 2502f4aeb0Sopenharmony_ci } 2602f4aeb0Sopenharmony_ci 2702f4aeb0Sopenharmony_ci h2 { 2802f4aeb0Sopenharmony_ci font: bold 19px verdana, sans-serif; 2902f4aeb0Sopenharmony_ci margin-top: 28px; 3002f4aeb0Sopenharmony_ci margin-bottom: 3px; 3102f4aeb0Sopenharmony_ci padding-top: 0; 3202f4aeb0Sopenharmony_ci padding-bottom: 0; 3302f4aeb0Sopenharmony_ci } 3402f4aeb0Sopenharmony_ci 3502f4aeb0Sopenharmony_ci h3 { 3602f4aeb0Sopenharmony_ci font: bold 19px verdana, sans-serif !important; 3702f4aeb0Sopenharmony_ci margin-top: 28px; 3802f4aeb0Sopenharmony_ci margin-bottom: 3px; 3902f4aeb0Sopenharmony_ci padding-top: 0; 4002f4aeb0Sopenharmony_ci padding-bottom: 0; 4102f4aeb0Sopenharmony_ci } 4202f4aeb0Sopenharmony_ci 4302f4aeb0Sopenharmony_ci li { 4402f4aeb0Sopenharmony_ci font: normal 16px verdana, sans-serif; 4502f4aeb0Sopenharmony_ci margin-top: 0; 4602f4aeb0Sopenharmony_ci margin-bottom: 18px; 4702f4aeb0Sopenharmony_ci padding-top: 0; 4802f4aeb0Sopenharmony_ci padding-bottom: 0; 4902f4aeb0Sopenharmony_ci } 5002f4aeb0Sopenharmony_ci 5102f4aeb0Sopenharmony_ci .pdparam { 5202f4aeb0Sopenharmony_ci font: italic 16px verdana, sans-serif; 5302f4aeb0Sopenharmony_ci } 5402f4aeb0Sopenharmony_ci 5502f4aeb0Sopenharmony_ci .term { 5602f4aeb0Sopenharmony_ci font: italic 16px verdana, sans-serif; 5702f4aeb0Sopenharmony_ci font-weight: normal; 5802f4aeb0Sopenharmony_ci } 5902f4aeb0Sopenharmony_ci 6002f4aeb0Sopenharmony_ci .type { 6102f4aeb0Sopenharmony_ci font: normal 16px verdana, sans-serif !important; 6202f4aeb0Sopenharmony_ci } 6302f4aeb0Sopenharmony_ci 6402f4aeb0Sopenharmony_ci .parameter { 6502f4aeb0Sopenharmony_ci font-style: italic; 6602f4aeb0Sopenharmony_ci } 6702f4aeb0Sopenharmony_ci 6802f4aeb0Sopenharmony_ci a:link, a:visited { 6902f4aeb0Sopenharmony_ci color: blue; 7002f4aeb0Sopenharmony_ci text-decoration: none; 7102f4aeb0Sopenharmony_ci font: normal 16px; 7202f4aeb0Sopenharmony_ci } 7302f4aeb0Sopenharmony_ci 7402f4aeb0Sopenharmony_ci a:hover { 7502f4aeb0Sopenharmony_ci background-color: #FFFF99; 7602f4aeb0Sopenharmony_ci font: normal 16px; 7702f4aeb0Sopenharmony_ci } 7802f4aeb0Sopenharmony_ci 7902f4aeb0Sopenharmony_ci div.funcsynopsis { 8002f4aeb0Sopenharmony_ci text-align: left; 8102f4aeb0Sopenharmony_ci background-color: #e6e6e6; 8202f4aeb0Sopenharmony_ci font: normal 16px verdana, sans-serif; 8302f4aeb0Sopenharmony_ci padding-top: 10px; 8402f4aeb0Sopenharmony_ci padding-bottom: 10px; 8502f4aeb0Sopenharmony_ci } 8602f4aeb0Sopenharmony_ci 8702f4aeb0Sopenharmony_ci div.funcsynopsis table { 8802f4aeb0Sopenharmony_ci border-collapse: separate; 8902f4aeb0Sopenharmony_ci font: normal 16px verdana, sans-serif; 9002f4aeb0Sopenharmony_ci } 9102f4aeb0Sopenharmony_ci 9202f4aeb0Sopenharmony_ci div.funcsynopsis td { 9302f4aeb0Sopenharmony_ci background-color: #e6e6e6; 9402f4aeb0Sopenharmony_ci border: 0 solid #000; 9502f4aeb0Sopenharmony_ci padding: 1px; 9602f4aeb0Sopenharmony_ci font: normal 16px verdana, sans-serif; 9702f4aeb0Sopenharmony_ci } 9802f4aeb0Sopenharmony_ci 9902f4aeb0Sopenharmony_ci div.refsect1 { 10002f4aeb0Sopenharmony_ci font-family: verdana, sans-serif; 10102f4aeb0Sopenharmony_ci font-size: 16px; 10202f4aeb0Sopenharmony_ci } 10302f4aeb0Sopenharmony_ci 10402f4aeb0Sopenharmony_ci code.constant { 10502f4aeb0Sopenharmony_ci font: normal 16px courier new, monospace !important; 10602f4aeb0Sopenharmony_ci } 10702f4aeb0Sopenharmony_ci 10802f4aeb0Sopenharmony_ci span.errorname { 10902f4aeb0Sopenharmony_ci font: normal 16px verdana, sans-serif !important; 11002f4aeb0Sopenharmony_ci } 11102f4aeb0Sopenharmony_ci 11202f4aeb0Sopenharmony_ci code.function { 11302f4aeb0Sopenharmony_ci font: bold 16px verdana, sans-serif !important; 11402f4aeb0Sopenharmony_ci } 11502f4aeb0Sopenharmony_ci 11602f4aeb0Sopenharmony_ci b.fsfunc { 11702f4aeb0Sopenharmony_ci font: bold 16px verdana, sans-serif !important; 11802f4aeb0Sopenharmony_ci } 11902f4aeb0Sopenharmony_ci 12002f4aeb0Sopenharmony_ci code.varname { 12102f4aeb0Sopenharmony_ci font: italic 16px verdana, sans-serif; 12202f4aeb0Sopenharmony_ci } 12302f4aeb0Sopenharmony_ci 12402f4aeb0Sopenharmony_ci code.replaceable { 12502f4aeb0Sopenharmony_ci font: italic 16px courier new, monospace; 12602f4aeb0Sopenharmony_ci } 12702f4aeb0Sopenharmony_ci 12802f4aeb0Sopenharmony_ci code.funcdef { 12902f4aeb0Sopenharmony_ci font: normal 16px verdana, sans-serif !important; 13002f4aeb0Sopenharmony_ci } 13102f4aeb0Sopenharmony_ci 13202f4aeb0Sopenharmony_ci .citerefentry { 13302f4aeb0Sopenharmony_ci font: normal 16px verdana, sans-serif !important; 13402f4aeb0Sopenharmony_ci } 13502f4aeb0Sopenharmony_ci 13602f4aeb0Sopenharmony_ci .parameter { 13702f4aeb0Sopenharmony_ci font-style: italic; 13802f4aeb0Sopenharmony_ci } 13902f4aeb0Sopenharmony_ci 14002f4aeb0Sopenharmony_ci code.fsfunc { 14102f4aeb0Sopenharmony_ci font: normal 16px verdana, sans-serif !important; 14202f4aeb0Sopenharmony_ci } 14302f4aeb0Sopenharmony_ci 14402f4aeb0Sopenharmony_ci /* PARAMETER: This style controls spacing between the terms in Parameter section */ 14502f4aeb0Sopenharmony_ci dt { 14602f4aeb0Sopenharmony_ci margin-top: 15px; 14702f4aeb0Sopenharmony_ci } 14802f4aeb0Sopenharmony_ci 14902f4aeb0Sopenharmony_ci /* TABLES: These styles apply to all tables OTHER than the Synopsis and Example tables */ 15002f4aeb0Sopenharmony_ci div.refsect1 table { 15102f4aeb0Sopenharmony_ci width: 100%; 15202f4aeb0Sopenharmony_ci margin-top: 10px; 15302f4aeb0Sopenharmony_ci background-color: #FFF; 15402f4aeb0Sopenharmony_ci border-collapse: collapse; 15502f4aeb0Sopenharmony_ci border-color: #000; 15602f4aeb0Sopenharmony_ci border-width: 1px; 15702f4aeb0Sopenharmony_ci font: normal 16px verdana, sans-serif; 15802f4aeb0Sopenharmony_ci } 15902f4aeb0Sopenharmony_ci 16002f4aeb0Sopenharmony_ci div.refsect1 th { 16102f4aeb0Sopenharmony_ci border-collapse: collapse; 16202f4aeb0Sopenharmony_ci border-color: #000; 16302f4aeb0Sopenharmony_ci border-width: 1px; 16402f4aeb0Sopenharmony_ci font: bold 16px verdana, sans-serif; 16502f4aeb0Sopenharmony_ci } 16602f4aeb0Sopenharmony_ci 16702f4aeb0Sopenharmony_ci div.refsect1 td { 16802f4aeb0Sopenharmony_ci background-color: #FFF; 16902f4aeb0Sopenharmony_ci padding: 5px; 17002f4aeb0Sopenharmony_ci vertical-align: text-top; 17102f4aeb0Sopenharmony_ci border-collapse: collapse; 17202f4aeb0Sopenharmony_ci border-color: #000; 17302f4aeb0Sopenharmony_ci border-width: 1px; 17402f4aeb0Sopenharmony_ci font: normal 16px verdana, sans-serif; 17502f4aeb0Sopenharmony_ci } 17602f4aeb0Sopenharmony_ci 17702f4aeb0Sopenharmony_ci div.refsect1 p{ 17802f4aeb0Sopenharmony_ci font: normal 16px verdana, sans-serif; 17902f4aeb0Sopenharmony_ci margin-top: 8px; 18002f4aeb0Sopenharmony_ci margin-bottom: 8px; 18102f4aeb0Sopenharmony_ci padding-top: 0; 18202f4aeb0Sopenharmony_ci padding-bottom: 0; 18302f4aeb0Sopenharmony_ci } 18402f4aeb0Sopenharmony_ci 18502f4aeb0Sopenharmony_ci 18602f4aeb0Sopenharmony_ci /* EXAMPLE: These styles apply only to the Example section */ 18702f4aeb0Sopenharmony_ci div.refsect2 { 18802f4aeb0Sopenharmony_ci font: normal 16px courier new, monospace !important; 18902f4aeb0Sopenharmony_ci } 19002f4aeb0Sopenharmony_ci 19102f4aeb0Sopenharmony_ci div.refsect2 table { 19202f4aeb0Sopenharmony_ci margin-top: 0; 19302f4aeb0Sopenharmony_ci background-color: #e6e6e6; 19402f4aeb0Sopenharmony_ci width: 100%; 19502f4aeb0Sopenharmony_ci border: 0 solid #000; 19602f4aeb0Sopenharmony_ci padding: 2px; 19702f4aeb0Sopenharmony_ci font: normal 16px courier new, monospace !important; 19802f4aeb0Sopenharmony_ci } 19902f4aeb0Sopenharmony_ci 20002f4aeb0Sopenharmony_ci div.refsect2 td { 20102f4aeb0Sopenharmony_ci background-color: #e6e6e6; 20202f4aeb0Sopenharmony_ci font: normal 16px courier new, monospace !important; 20302f4aeb0Sopenharmony_ci white-space:pre; 20402f4aeb0Sopenharmony_ci } 20502f4aeb0Sopenharmony_ci 20602f4aeb0Sopenharmony_ci /* COPYRIGHT: This style formats the text of the copyright statement at the bottom of the page */ 20702f4aeb0Sopenharmony_ci div.refsect3 { 20802f4aeb0Sopenharmony_ci font: normal 11px verdana, sans-serif; 20902f4aeb0Sopenharmony_ci margin-top: 50px; 21002f4aeb0Sopenharmony_ci margin-bottom: 20px; 21102f4aeb0Sopenharmony_ci padding-top: 0; 21202f4aeb0Sopenharmony_ci padding-bottom: 0; 21302f4aeb0Sopenharmony_ci } 21402f4aeb0Sopenharmony_ci 21502f4aeb0Sopenharmony_ci</style> 21602f4aeb0Sopenharmony_ci <title>eglCreateWindowSurface</title> 21702f4aeb0Sopenharmony_ci <meta name="generator" content="DocBook XSL Stylesheets V1.78.1" /> 21802f4aeb0Sopenharmony_ci </head> 21902f4aeb0Sopenharmony_ci <body> 22002f4aeb0Sopenharmony_ci <div class="refentry"> 22102f4aeb0Sopenharmony_ci <a id="eglCreateWindowSurface"></a> 22202f4aeb0Sopenharmony_ci <div class="titlepage"></div> 22302f4aeb0Sopenharmony_ci <div xmlns="" class="refnamediv"> 22402f4aeb0Sopenharmony_ci <h1>eglCreateWindowSurface</h1> 22502f4aeb0Sopenharmony_ci <p> 22602f4aeb0Sopenharmony_ci create a new <acronym xmlns="http://www.w3.org/1999/xhtml" class="acronym">EGL</acronym> window surface 22702f4aeb0Sopenharmony_ci </p> 22802f4aeb0Sopenharmony_ci </div> 22902f4aeb0Sopenharmony_ci <div class="refsynopsisdiv"> 23002f4aeb0Sopenharmony_ci <h2>C Specification</h2> 23102f4aeb0Sopenharmony_ci <div class="funcsynopsis"> 23202f4aeb0Sopenharmony_ci <table xmlns="" border="0" summary="Function synopsis" cellspacing="0" cellpadding="0"> 23302f4aeb0Sopenharmony_ci <tr valign="bottom"> 23402f4aeb0Sopenharmony_ci <td> 23502f4aeb0Sopenharmony_ci <code xmlns="http://www.w3.org/1999/xhtml" class="funcdef">EGLSurface <strong class="fsfunc">eglCreateWindowSurface</strong>(</code> 23602f4aeb0Sopenharmony_ci <td>EGLDisplay <var xmlns="http://www.w3.org/1999/xhtml" class="pdparam">display</var>, </td> 23702f4aeb0Sopenharmony_ci </td> 23802f4aeb0Sopenharmony_ci </tr> 23902f4aeb0Sopenharmony_ci <tr valign="top"> 24002f4aeb0Sopenharmony_ci <td> </td> 24102f4aeb0Sopenharmony_ci <td>EGLConfig <var xmlns="http://www.w3.org/1999/xhtml" class="pdparam">config</var>, </td> 24202f4aeb0Sopenharmony_ci </tr> 24302f4aeb0Sopenharmony_ci <tr valign="top"> 24402f4aeb0Sopenharmony_ci <td> </td> 24502f4aeb0Sopenharmony_ci <td>NativeWindowType <var xmlns="http://www.w3.org/1999/xhtml" class="pdparam">native_window</var>, </td> 24602f4aeb0Sopenharmony_ci </tr> 24702f4aeb0Sopenharmony_ci <tr valign="top"> 24802f4aeb0Sopenharmony_ci <td> </td> 24902f4aeb0Sopenharmony_ci <td>EGLint const * <var xmlns="http://www.w3.org/1999/xhtml" class="pdparam">attrib_list</var><code>)</code></td> 25002f4aeb0Sopenharmony_ci </tr> 25102f4aeb0Sopenharmony_ci </table> 25202f4aeb0Sopenharmony_ci </div> 25302f4aeb0Sopenharmony_ci </div> 25402f4aeb0Sopenharmony_ci <div class="refsect1"> 25502f4aeb0Sopenharmony_ci <a id="parameters"></a> 25602f4aeb0Sopenharmony_ci <h2>Parameters</h2> 25702f4aeb0Sopenharmony_ci <div class="variablelist"> 25802f4aeb0Sopenharmony_ci <dl class="variablelist"> 25902f4aeb0Sopenharmony_ci <dt> 26002f4aeb0Sopenharmony_ci <span class="term"> 26102f4aeb0Sopenharmony_ci <em class="parameter"> 26202f4aeb0Sopenharmony_ci <code>display</code> 26302f4aeb0Sopenharmony_ci </em> 26402f4aeb0Sopenharmony_ci </span> 26502f4aeb0Sopenharmony_ci </dt> 26602f4aeb0Sopenharmony_ci <dd> 26702f4aeb0Sopenharmony_ci <p>Specifies the EGL display connection.</p> 26802f4aeb0Sopenharmony_ci </dd> 26902f4aeb0Sopenharmony_ci <dt> 27002f4aeb0Sopenharmony_ci <span class="term"> 27102f4aeb0Sopenharmony_ci <em class="parameter"> 27202f4aeb0Sopenharmony_ci <code>config</code> 27302f4aeb0Sopenharmony_ci </em> 27402f4aeb0Sopenharmony_ci </span> 27502f4aeb0Sopenharmony_ci </dt> 27602f4aeb0Sopenharmony_ci <dd> 27702f4aeb0Sopenharmony_ci <p>Specifies the EGL frame buffer configuration that defines the 27802f4aeb0Sopenharmony_ci frame buffer resource available to the surface.</p> 27902f4aeb0Sopenharmony_ci </dd> 28002f4aeb0Sopenharmony_ci <dt> 28102f4aeb0Sopenharmony_ci <span class="term"> 28202f4aeb0Sopenharmony_ci <em class="parameter"> 28302f4aeb0Sopenharmony_ci <code>native_window</code> 28402f4aeb0Sopenharmony_ci </em> 28502f4aeb0Sopenharmony_ci </span> 28602f4aeb0Sopenharmony_ci </dt> 28702f4aeb0Sopenharmony_ci <dd> 28802f4aeb0Sopenharmony_ci <p>Specifies the native window.</p> 28902f4aeb0Sopenharmony_ci </dd> 29002f4aeb0Sopenharmony_ci <dt> 29102f4aeb0Sopenharmony_ci <span class="term"> 29202f4aeb0Sopenharmony_ci <em class="parameter"> 29302f4aeb0Sopenharmony_ci <code>attrib_list</code> 29402f4aeb0Sopenharmony_ci </em> 29502f4aeb0Sopenharmony_ci </span> 29602f4aeb0Sopenharmony_ci </dt> 29702f4aeb0Sopenharmony_ci <dd> 29802f4aeb0Sopenharmony_ci <p> 29902f4aeb0Sopenharmony_ci Specifies window surface attributes. 30002f4aeb0Sopenharmony_ci May be <code class="constant">NULL</code> or empty 30102f4aeb0Sopenharmony_ci (first attribute is <code class="constant">EGL_NONE</code>). 30202f4aeb0Sopenharmony_ci </p> 30302f4aeb0Sopenharmony_ci </dd> 30402f4aeb0Sopenharmony_ci </dl> 30502f4aeb0Sopenharmony_ci </div> 30602f4aeb0Sopenharmony_ci </div> 30702f4aeb0Sopenharmony_ci <div class="refsect1"> 30802f4aeb0Sopenharmony_ci <a id="description"></a> 30902f4aeb0Sopenharmony_ci <h2>Description</h2> 31002f4aeb0Sopenharmony_ci <p> 31102f4aeb0Sopenharmony_ci <code class="function">eglCreateWindowSurface</code> creates an EGL 31202f4aeb0Sopenharmony_ci window surface and returns its handle. If 31302f4aeb0Sopenharmony_ci <code class="function">eglCreateWindowSurface</code> fails to create 31402f4aeb0Sopenharmony_ci a window surface, <code class="constant">EGL_NO_SURFACE</code> is 31502f4aeb0Sopenharmony_ci returned. 31602f4aeb0Sopenharmony_ci </p> 31702f4aeb0Sopenharmony_ci <p> 31802f4aeb0Sopenharmony_ci Surface attributes are specified as a list of 31902f4aeb0Sopenharmony_ci attribute-value pairs, terminated with 32002f4aeb0Sopenharmony_ci <code class="constant">EGL_NONE</code>. Accepted attributes 32102f4aeb0Sopenharmony_ci are: 32202f4aeb0Sopenharmony_ci </p> 32302f4aeb0Sopenharmony_ci <div class="variablelist"> 32402f4aeb0Sopenharmony_ci <dl class="variablelist"> 32502f4aeb0Sopenharmony_ci <dt> 32602f4aeb0Sopenharmony_ci <span class="term"> 32702f4aeb0Sopenharmony_ci <code class="constant">EGL_RENDER_BUFFER</code> 32802f4aeb0Sopenharmony_ci </span> 32902f4aeb0Sopenharmony_ci </dt> 33002f4aeb0Sopenharmony_ci <dd> 33102f4aeb0Sopenharmony_ci <p> 33202f4aeb0Sopenharmony_ci Specifies which buffer should be used for client API 33302f4aeb0Sopenharmony_ci rendering to the window. If its value is 33402f4aeb0Sopenharmony_ci <code class="constant">EGL_SINGLE_BUFFER</code>, then client 33502f4aeb0Sopenharmony_ci APIs should render directly into the visible window. 33602f4aeb0Sopenharmony_ci If its value is 33702f4aeb0Sopenharmony_ci <code class="constant">EGL_BACK_BUFFER</code>, then client 33802f4aeb0Sopenharmony_ci APIs should render into the back buffer. The default 33902f4aeb0Sopenharmony_ci value of <code class="constant">EGL_RENDER_BUFFER</code> is 34002f4aeb0Sopenharmony_ci <code class="constant">EGL_BACK_BUFFER</code>. 34102f4aeb0Sopenharmony_ci </p> 34202f4aeb0Sopenharmony_ci <p> 34302f4aeb0Sopenharmony_ci Client APIs may not be able to respect the requested 34402f4aeb0Sopenharmony_ci rendering buffer. To determine the actual buffer 34502f4aeb0Sopenharmony_ci being rendered to by a context, call 34602f4aeb0Sopenharmony_ci <a class="citerefentry" href="eglQueryContext.html"><span class="citerefentry"><span class="refentrytitle">eglQueryContext</span></span></a>. 34702f4aeb0Sopenharmony_ci </p> 34802f4aeb0Sopenharmony_ci </dd> 34902f4aeb0Sopenharmony_ci <dt> 35002f4aeb0Sopenharmony_ci <span class="term"> 35102f4aeb0Sopenharmony_ci <code class="constant">EGL_VG_ALPHA_FORMAT</code> 35202f4aeb0Sopenharmony_ci </span> 35302f4aeb0Sopenharmony_ci </dt> 35402f4aeb0Sopenharmony_ci <dd> 35502f4aeb0Sopenharmony_ci <p> 35602f4aeb0Sopenharmony_ci Specifies how alpha values are interpreted by OpenVG 35702f4aeb0Sopenharmony_ci when rendering to the surface. If its value is 35802f4aeb0Sopenharmony_ci <code class="constant">EGL_VG_ALPHA_FORMAT_NONPRE</code>, 35902f4aeb0Sopenharmony_ci then alpha values are not premultipled. If its value 36002f4aeb0Sopenharmony_ci is <code class="constant">EGL_VG_ALPHA_FORMAT_PRE</code>, 36102f4aeb0Sopenharmony_ci then alpha values are premultiplied. The default 36202f4aeb0Sopenharmony_ci value of <code class="constant">EGL_VG_ALPHA_FORMAT</code> is 36302f4aeb0Sopenharmony_ci <code class="constant">EGL_VG_ALPHA_FORMAT_NONPRE</code>. 36402f4aeb0Sopenharmony_ci </p> 36502f4aeb0Sopenharmony_ci </dd> 36602f4aeb0Sopenharmony_ci <dt> 36702f4aeb0Sopenharmony_ci <span class="term"> 36802f4aeb0Sopenharmony_ci <code class="constant">EGL_VG_COLORSPACE</code> 36902f4aeb0Sopenharmony_ci </span> 37002f4aeb0Sopenharmony_ci </dt> 37102f4aeb0Sopenharmony_ci <dd> 37202f4aeb0Sopenharmony_ci <p> 37302f4aeb0Sopenharmony_ci Specifies the color space used by OpenVG when 37402f4aeb0Sopenharmony_ci rendering to the surface. If its value is 37502f4aeb0Sopenharmony_ci <code class="constant">EGL_VG_COLORSPACE_sRGB</code>, then a 37602f4aeb0Sopenharmony_ci non-linear, perceptually uniform color space is 37702f4aeb0Sopenharmony_ci assumed, with a corresponding 37802f4aeb0Sopenharmony_ci <span class="type">VGImageFormat</span> of form 37902f4aeb0Sopenharmony_ci <code class="constant">VG_s*</code>. If its value is 38002f4aeb0Sopenharmony_ci <code class="constant">EGL_VG_COLORSPACE_LINEAR</code>, then 38102f4aeb0Sopenharmony_ci a linear color space is assumed, with a 38202f4aeb0Sopenharmony_ci corresponding <span class="type">VGImageFormat</span> of form 38302f4aeb0Sopenharmony_ci <code class="constant">VG_l*</code>. The default value of 38402f4aeb0Sopenharmony_ci <code class="constant">EGL_VG_COLORSPACE</code> is 38502f4aeb0Sopenharmony_ci <code class="constant">EGL_VG_COLORSPACE_sRGB</code>. 38602f4aeb0Sopenharmony_ci </p> 38702f4aeb0Sopenharmony_ci </dd> 38802f4aeb0Sopenharmony_ci </dl> 38902f4aeb0Sopenharmony_ci </div> 39002f4aeb0Sopenharmony_ci <p> 39102f4aeb0Sopenharmony_ci Any EGL rendering context that was created with respect to 39202f4aeb0Sopenharmony_ci <em class="parameter"><code>config</code></em> can be used to render into the 39302f4aeb0Sopenharmony_ci surface. Use 39402f4aeb0Sopenharmony_ci <a class="citerefentry" href="eglMakeCurrent.html"><span class="citerefentry"><span class="refentrytitle">eglMakeCurrent</span></span></a> 39502f4aeb0Sopenharmony_ci to attach an EGL rendering context to the surface. 39602f4aeb0Sopenharmony_ci </p> 39702f4aeb0Sopenharmony_ci <p> 39802f4aeb0Sopenharmony_ci Use 39902f4aeb0Sopenharmony_ci <a class="citerefentry" href="eglQuerySurface.html"><span class="citerefentry"><span class="refentrytitle">eglQuerySurface</span></span></a> 40002f4aeb0Sopenharmony_ci to retrieve the ID of <em class="parameter"><code>config</code></em>. 40102f4aeb0Sopenharmony_ci </p> 40202f4aeb0Sopenharmony_ci <p> 40302f4aeb0Sopenharmony_ci Use 40402f4aeb0Sopenharmony_ci <a class="citerefentry" href="eglDestroySurface.html"><span class="citerefentry"><span class="refentrytitle">eglDestroySurface</span></span></a> 40502f4aeb0Sopenharmony_ci to destroy the surface. 40602f4aeb0Sopenharmony_ci </p> 40702f4aeb0Sopenharmony_ci </div> 40802f4aeb0Sopenharmony_ci <div class="refsect1"> 40902f4aeb0Sopenharmony_ci <a id="notes"></a> 41002f4aeb0Sopenharmony_ci <h2>Notes</h2> 41102f4aeb0Sopenharmony_ci <p> 41202f4aeb0Sopenharmony_ci Attributes <code class="constant">EGL_RENDER_BUFFER</code>, 41302f4aeb0Sopenharmony_ci <code class="constant">EGL_VG_ALPHA_FORMAT</code>, and 41402f4aeb0Sopenharmony_ci <code class="constant">EGL_VG_COLORSPACE</code>, and the 41502f4aeb0Sopenharmony_ci corresponding attribute values, are supported only if the 41602f4aeb0Sopenharmony_ci EGL version is 1.2 or greater. 41702f4aeb0Sopenharmony_ci </p> 41802f4aeb0Sopenharmony_ci <p> 41902f4aeb0Sopenharmony_ci The <code class="constant">EGL_VG_ALPHA_FORMAT</code> and 42002f4aeb0Sopenharmony_ci <code class="constant">EGL_VG_COLORSPACE</code> attributes are used 42102f4aeb0Sopenharmony_ci only by OpenVG. EGL itself, and other client APIs such as 42202f4aeb0Sopenharmony_ci OpenGL and OpenGL ES , do not distinguish multiple 42302f4aeb0Sopenharmony_ci colorspace models. Refer to section 11.2 of the OpenVG 1.0 42402f4aeb0Sopenharmony_ci specification for more information. The native window 42502f4aeb0Sopenharmony_ci system's use and interpretation of alpha values is outside 42602f4aeb0Sopenharmony_ci the scope of EGL, although the preferred behavior is for the 42702f4aeb0Sopenharmony_ci window system to ignore the value of 42802f4aeb0Sopenharmony_ci <code class="constant">EGL_VG_ALPHA_FORMAT</code> when compositing 42902f4aeb0Sopenharmony_ci window surfaces. 43002f4aeb0Sopenharmony_ci </p> 43102f4aeb0Sopenharmony_ci </div> 43202f4aeb0Sopenharmony_ci <div class="refsect1"> 43302f4aeb0Sopenharmony_ci <a id="errors"></a> 43402f4aeb0Sopenharmony_ci <h2>Errors</h2> 43502f4aeb0Sopenharmony_ci <p> 43602f4aeb0Sopenharmony_ci <code class="constant">EGL_NO_SURFACE</code> is returned if creation of 43702f4aeb0Sopenharmony_ci the context fails. 43802f4aeb0Sopenharmony_ci </p> 43902f4aeb0Sopenharmony_ci <p> 44002f4aeb0Sopenharmony_ci <code class="constant">EGL_BAD_DISPLAY</code> is generated if 44102f4aeb0Sopenharmony_ci <em class="parameter"><code>display</code></em> is not an EGL display connection. 44202f4aeb0Sopenharmony_ci </p> 44302f4aeb0Sopenharmony_ci <p> 44402f4aeb0Sopenharmony_ci <code class="constant">EGL_NOT_INITIALIZED</code> is generated if 44502f4aeb0Sopenharmony_ci <em class="parameter"><code>display</code></em> has not been initialized. 44602f4aeb0Sopenharmony_ci </p> 44702f4aeb0Sopenharmony_ci <p> 44802f4aeb0Sopenharmony_ci <code class="constant">EGL_BAD_CONFIG</code> is generated if 44902f4aeb0Sopenharmony_ci <em class="parameter"><code>config</code></em> is not an EGL frame buffer configuration. 45002f4aeb0Sopenharmony_ci </p> 45102f4aeb0Sopenharmony_ci <p> 45202f4aeb0Sopenharmony_ci <code class="constant">EGL_BAD_NATIVE_WINDOW</code> may be generated if 45302f4aeb0Sopenharmony_ci <em class="parameter"><code>native_window</code></em> is not a valid native window. 45402f4aeb0Sopenharmony_ci </p> 45502f4aeb0Sopenharmony_ci <p> 45602f4aeb0Sopenharmony_ci <code class="constant">EGL_BAD_ATTRIBUTE</code> is generated if 45702f4aeb0Sopenharmony_ci <em class="parameter"><code>attrib_list</code></em> contains an invalid window attribute 45802f4aeb0Sopenharmony_ci or if an attribute value is not recognized or is out of range. 45902f4aeb0Sopenharmony_ci </p> 46002f4aeb0Sopenharmony_ci <p> 46102f4aeb0Sopenharmony_ci <code class="constant">EGL_BAD_ALLOC</code> is generated if there are not 46202f4aeb0Sopenharmony_ci enough resources to allocate the new surface. 46302f4aeb0Sopenharmony_ci </p> 46402f4aeb0Sopenharmony_ci <p> 46502f4aeb0Sopenharmony_ci <code class="constant">EGL_BAD_MATCH</code> is generated if the attributes of 46602f4aeb0Sopenharmony_ci <em class="parameter"><code>native_window</code></em> do not correspond to 46702f4aeb0Sopenharmony_ci <em class="parameter"><code>config</code></em> or if 46802f4aeb0Sopenharmony_ci <em class="parameter"><code>config</code></em> does not support rendering to windows 46902f4aeb0Sopenharmony_ci (the <code class="constant">EGL_SURFACE_TYPE</code> attribute does not contain 47002f4aeb0Sopenharmony_ci <code class="constant">EGL_WINDOW_BIT</code>). 47102f4aeb0Sopenharmony_ci </p> 47202f4aeb0Sopenharmony_ci <p> 47302f4aeb0Sopenharmony_ci <code class="constant">EGL_BAD_MATCH</code> is generated if 47402f4aeb0Sopenharmony_ci <em class="parameter"><code>config</code></em> does not support the specified 47502f4aeb0Sopenharmony_ci OpenVG alpha format attribute (the value of 47602f4aeb0Sopenharmony_ci <code class="constant">EGL_VG_ALPHA_FORMAT</code> is 47702f4aeb0Sopenharmony_ci <code class="constant">EGL_VG_ALPHA_FORMAT_PRE</code> and the 47802f4aeb0Sopenharmony_ci <code class="constant">EGL_VG_ALPHA_FORMAT_PRE_BIT</code> is not set 47902f4aeb0Sopenharmony_ci in the <code class="constant">EGL_SURFACE_TYPE</code> attribute of 48002f4aeb0Sopenharmony_ci <em class="parameter"><code>config</code></em>) or colorspace attribute (the 48102f4aeb0Sopenharmony_ci value of <code class="constant">EGL_VG_COLORSPACE</code> is 48202f4aeb0Sopenharmony_ci <code class="constant">EGL_VG_COLORSPACE_LINEAR</code> and the 48302f4aeb0Sopenharmony_ci <code class="constant">EGL_VG_COLORSPACE_LINEAR_IT</code> is not set 48402f4aeb0Sopenharmony_ci in the <code class="constant">EGL_SURFACE_TYPE</code> attribute of 48502f4aeb0Sopenharmony_ci <em class="parameter"><code>config</code></em>). 48602f4aeb0Sopenharmony_ci </p> 48702f4aeb0Sopenharmony_ci </div> 48802f4aeb0Sopenharmony_ci <div class="refsect1"> 48902f4aeb0Sopenharmony_ci <a id="seealso"></a> 49002f4aeb0Sopenharmony_ci <h2>See Also</h2> 49102f4aeb0Sopenharmony_ci <p> 49202f4aeb0Sopenharmony_ci <a class="citerefentry" href="eglDestroySurface.html"><span class="citerefentry"><span class="refentrytitle">eglDestroySurface</span></span></a>, 49302f4aeb0Sopenharmony_ci <a class="citerefentry" href="eglChooseConfig.html"><span class="citerefentry"><span class="refentrytitle">eglChooseConfig</span></span></a>, 49402f4aeb0Sopenharmony_ci <a class="citerefentry" href="eglGetConfigs.html"><span class="citerefentry"><span class="refentrytitle">eglGetConfigs</span></span></a>, 49502f4aeb0Sopenharmony_ci <a class="citerefentry" href="eglMakeCurrent.html"><span class="citerefentry"><span class="refentrytitle">eglMakeCurrent</span></span></a>, 49602f4aeb0Sopenharmony_ci <a class="citerefentry" href="eglQuerySurface.html"><span class="citerefentry"><span class="refentrytitle">eglQuerySurface</span></span></a> 49702f4aeb0Sopenharmony_ci </p> 49802f4aeb0Sopenharmony_ci </div> 49902f4aeb0Sopenharmony_ci <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> 50002f4aeb0Sopenharmony_ciCopyright © 2003-2014 The Khronos Group Inc. 50102f4aeb0Sopenharmony_ciPermission is hereby granted, free of charge, to any person obtaining a 50202f4aeb0Sopenharmony_cicopy of this software and/or associated documentation files (the 50302f4aeb0Sopenharmony_ci"Materials"), to deal in the Materials without restriction, including 50402f4aeb0Sopenharmony_ciwithout limitation the rights to use, copy, modify, merge, publish, 50502f4aeb0Sopenharmony_cidistribute, sublicense, and/or sell copies of the Materials, and to 50602f4aeb0Sopenharmony_cipermit persons to whom the Materials are furnished to do so, subject to 50702f4aeb0Sopenharmony_cithe condition that this copyright notice and permission notice shall be included 50802f4aeb0Sopenharmony_ciin all copies or substantial portions of the Materials. 50902f4aeb0Sopenharmony_ci</div> 51002f4aeb0Sopenharmony_ci </div> 51102f4aeb0Sopenharmony_ci </body> 51202f4aeb0Sopenharmony_ci</html> 513
