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; 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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>eglQuerySurface</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="eglQuerySurface"></a> 22202f4aeb0Sopenharmony_ci <div class="titlepage"></div> 22302f4aeb0Sopenharmony_ci <div xmlns="" class="refnamediv"> 22402f4aeb0Sopenharmony_ci <h1>eglQuerySurface</h1> 22502f4aeb0Sopenharmony_ci <p> 22602f4aeb0Sopenharmony_ci return <acronym xmlns="http://www.w3.org/1999/xhtml" class="acronym">EGL</acronym> surface information 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">EGLBoolean <strong class="fsfunc">eglQuerySurface</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>EGLSurface <var xmlns="http://www.w3.org/1999/xhtml" class="pdparam">surface</var>, </td> 24202f4aeb0Sopenharmony_ci </tr> 24302f4aeb0Sopenharmony_ci <tr valign="top"> 24402f4aeb0Sopenharmony_ci <td> </td> 24502f4aeb0Sopenharmony_ci <td>EGLint <var xmlns="http://www.w3.org/1999/xhtml" class="pdparam">attribute</var>, </td> 24602f4aeb0Sopenharmony_ci </tr> 24702f4aeb0Sopenharmony_ci <tr valign="top"> 24802f4aeb0Sopenharmony_ci <td> </td> 24902f4aeb0Sopenharmony_ci <td>EGLint * <var xmlns="http://www.w3.org/1999/xhtml" class="pdparam">value</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> 26802f4aeb0Sopenharmony_ci Specifies the EGL display connection. 26902f4aeb0Sopenharmony_ci </p> 27002f4aeb0Sopenharmony_ci </dd> 27102f4aeb0Sopenharmony_ci <dt> 27202f4aeb0Sopenharmony_ci <span class="term"> 27302f4aeb0Sopenharmony_ci <em class="parameter"> 27402f4aeb0Sopenharmony_ci <code>surface</code> 27502f4aeb0Sopenharmony_ci </em> 27602f4aeb0Sopenharmony_ci </span> 27702f4aeb0Sopenharmony_ci </dt> 27802f4aeb0Sopenharmony_ci <dd> 27902f4aeb0Sopenharmony_ci <p> 28002f4aeb0Sopenharmony_ci Specifies the EGL surface to query. 28102f4aeb0Sopenharmony_ci </p> 28202f4aeb0Sopenharmony_ci </dd> 28302f4aeb0Sopenharmony_ci <dt> 28402f4aeb0Sopenharmony_ci <span class="term"> 28502f4aeb0Sopenharmony_ci <em class="parameter"> 28602f4aeb0Sopenharmony_ci <code>attribute</code> 28702f4aeb0Sopenharmony_ci </em> 28802f4aeb0Sopenharmony_ci </span> 28902f4aeb0Sopenharmony_ci </dt> 29002f4aeb0Sopenharmony_ci <dd> 29102f4aeb0Sopenharmony_ci <p> 29202f4aeb0Sopenharmony_ci Specifies the EGL surface attribute to be returned. 29302f4aeb0Sopenharmony_ci </p> 29402f4aeb0Sopenharmony_ci </dd> 29502f4aeb0Sopenharmony_ci <dt> 29602f4aeb0Sopenharmony_ci <span class="term"> 29702f4aeb0Sopenharmony_ci <em class="parameter"> 29802f4aeb0Sopenharmony_ci <code>value</code> 29902f4aeb0Sopenharmony_ci </em> 30002f4aeb0Sopenharmony_ci </span> 30102f4aeb0Sopenharmony_ci </dt> 30202f4aeb0Sopenharmony_ci <dd> 30302f4aeb0Sopenharmony_ci <p> 30402f4aeb0Sopenharmony_ci Returns the requested value. 30502f4aeb0Sopenharmony_ci </p> 30602f4aeb0Sopenharmony_ci </dd> 30702f4aeb0Sopenharmony_ci </dl> 30802f4aeb0Sopenharmony_ci </div> 30902f4aeb0Sopenharmony_ci </div> 31002f4aeb0Sopenharmony_ci <div class="refsect1"> 31102f4aeb0Sopenharmony_ci <a id="description"></a> 31202f4aeb0Sopenharmony_ci <h2>Description</h2> 31302f4aeb0Sopenharmony_ci <p> 31402f4aeb0Sopenharmony_ci <code class="function">eglQuerySurface</code> returns in 31502f4aeb0Sopenharmony_ci <em class="parameter"><code>value</code></em> the value of 31602f4aeb0Sopenharmony_ci <em class="parameter"><code>attribute</code></em> for <em class="parameter"><code>surface</code></em>. 31702f4aeb0Sopenharmony_ci <em class="parameter"><code>attribute</code></em> can be one of the following: 31802f4aeb0Sopenharmony_ci </p> 31902f4aeb0Sopenharmony_ci <div class="variablelist"> 32002f4aeb0Sopenharmony_ci <dl class="variablelist"> 32102f4aeb0Sopenharmony_ci <dt> 32202f4aeb0Sopenharmony_ci <span class="term"> 32302f4aeb0Sopenharmony_ci <code class="constant">EGL_CONFIG_ID</code> 32402f4aeb0Sopenharmony_ci </span> 32502f4aeb0Sopenharmony_ci </dt> 32602f4aeb0Sopenharmony_ci <dd> 32702f4aeb0Sopenharmony_ci <p> 32802f4aeb0Sopenharmony_ci Returns the ID of the EGL frame buffer configuration 32902f4aeb0Sopenharmony_ci with respect to which the surface was created. 33002f4aeb0Sopenharmony_ci </p> 33102f4aeb0Sopenharmony_ci </dd> 33202f4aeb0Sopenharmony_ci <dt> 33302f4aeb0Sopenharmony_ci <span class="term"> 33402f4aeb0Sopenharmony_ci <code class="constant">EGL_HEIGHT</code> 33502f4aeb0Sopenharmony_ci </span> 33602f4aeb0Sopenharmony_ci </dt> 33702f4aeb0Sopenharmony_ci <dd> 33802f4aeb0Sopenharmony_ci <p> 33902f4aeb0Sopenharmony_ci Returns the height of the surface in pixels. 34002f4aeb0Sopenharmony_ci </p> 34102f4aeb0Sopenharmony_ci </dd> 34202f4aeb0Sopenharmony_ci <dt> 34302f4aeb0Sopenharmony_ci <span class="term"> 34402f4aeb0Sopenharmony_ci <code class="constant">EGL_HORIZONTAL_RESOLUTION</code> 34502f4aeb0Sopenharmony_ci </span> 34602f4aeb0Sopenharmony_ci </dt> 34702f4aeb0Sopenharmony_ci <dd> 34802f4aeb0Sopenharmony_ci <p> 34902f4aeb0Sopenharmony_ci Returns the horizontal dot pitch of the display on 35002f4aeb0Sopenharmony_ci which a window surface is visible. The value 35102f4aeb0Sopenharmony_ci returned is equal to the actual dot pitch, in 35202f4aeb0Sopenharmony_ci pixels/meter, multiplied by the constant value 35302f4aeb0Sopenharmony_ci <code class="constant">EGL_DISPLAY_SCALING</code>. 35402f4aeb0Sopenharmony_ci </p> 35502f4aeb0Sopenharmony_ci </dd> 35602f4aeb0Sopenharmony_ci <dt> 35702f4aeb0Sopenharmony_ci <span class="term"> 35802f4aeb0Sopenharmony_ci <code class="constant">EGL_LARGEST_PBUFFER</code> 35902f4aeb0Sopenharmony_ci </span> 36002f4aeb0Sopenharmony_ci </dt> 36102f4aeb0Sopenharmony_ci <dd> 36202f4aeb0Sopenharmony_ci <p> 36302f4aeb0Sopenharmony_ci Returns the same attribute value specified when the 36402f4aeb0Sopenharmony_ci surface was created with 36502f4aeb0Sopenharmony_ci <a class="citerefentry" href="eglCreatePbufferSurface.html"><span class="citerefentry"><span class="refentrytitle">eglCreatePbufferSurface</span></span></a>. 36602f4aeb0Sopenharmony_ci For a window or pixmap surface, 36702f4aeb0Sopenharmony_ci <em class="parameter"><code>value</code></em> is not modified. 36802f4aeb0Sopenharmony_ci </p> 36902f4aeb0Sopenharmony_ci </dd> 37002f4aeb0Sopenharmony_ci <dt> 37102f4aeb0Sopenharmony_ci <span class="term"> 37202f4aeb0Sopenharmony_ci <code class="constant">EGL_MIPMAP_LEVEL</code> 37302f4aeb0Sopenharmony_ci </span> 37402f4aeb0Sopenharmony_ci </dt> 37502f4aeb0Sopenharmony_ci <dd> 37602f4aeb0Sopenharmony_ci <p> 37702f4aeb0Sopenharmony_ci Returns which level of the mipmap to render to, if 37802f4aeb0Sopenharmony_ci texture has mipmaps. 37902f4aeb0Sopenharmony_ci </p> 38002f4aeb0Sopenharmony_ci </dd> 38102f4aeb0Sopenharmony_ci <dt> 38202f4aeb0Sopenharmony_ci <span class="term"> 38302f4aeb0Sopenharmony_ci <code class="constant">EGL_MIPMAP_TEXTURE</code> 38402f4aeb0Sopenharmony_ci </span> 38502f4aeb0Sopenharmony_ci </dt> 38602f4aeb0Sopenharmony_ci <dd> 38702f4aeb0Sopenharmony_ci <p> 38802f4aeb0Sopenharmony_ci Returns <code class="constant">EGL_TRUE</code> if texture has 38902f4aeb0Sopenharmony_ci mipmaps, <code class="constant">EGL_FALSE</code> otherwise. 39002f4aeb0Sopenharmony_ci </p> 39102f4aeb0Sopenharmony_ci </dd> 39202f4aeb0Sopenharmony_ci <dt> 39302f4aeb0Sopenharmony_ci <span class="term"> 39402f4aeb0Sopenharmony_ci <code class="constant">EGL_MULTISAMPLE_RESOLVE</code> 39502f4aeb0Sopenharmony_ci </span> 39602f4aeb0Sopenharmony_ci </dt> 39702f4aeb0Sopenharmony_ci <dd> 39802f4aeb0Sopenharmony_ci <p> 39902f4aeb0Sopenharmony_ci Returns the filter used when resolving the 40002f4aeb0Sopenharmony_ci multisample buffer. The filter may be either 40102f4aeb0Sopenharmony_ci <code class="constant">EGL_MULTISAMPLE_RESOLVE_DEFAULT</code> 40202f4aeb0Sopenharmony_ci or <code class="constant">EGL_MULTISAMPLE_RESOLVE_BOX</code>, 40302f4aeb0Sopenharmony_ci as described for 40402f4aeb0Sopenharmony_ci <a class="citerefentry" href="eglSurfaceAttrib.html"><span class="citerefentry"><span class="refentrytitle">eglSurfaceAttrib</span></span></a>. 40502f4aeb0Sopenharmony_ci </p> 40602f4aeb0Sopenharmony_ci </dd> 40702f4aeb0Sopenharmony_ci <dt> 40802f4aeb0Sopenharmony_ci <span class="term"> 40902f4aeb0Sopenharmony_ci <code class="constant">EGL_PIXEL_ASPECT_RATIO</code> 41002f4aeb0Sopenharmony_ci </span> 41102f4aeb0Sopenharmony_ci </dt> 41202f4aeb0Sopenharmony_ci <dd> 41302f4aeb0Sopenharmony_ci <p> 41402f4aeb0Sopenharmony_ci Returns the aspect ratio of an individual pixel (the 41502f4aeb0Sopenharmony_ci ratio of a pixel's width to its height). The value 41602f4aeb0Sopenharmony_ci returned is equal to the actual aspect ratio 41702f4aeb0Sopenharmony_ci multiplied by the constant value 41802f4aeb0Sopenharmony_ci <code class="constant">EGL_DISPLAY_SCALING</code>. 41902f4aeb0Sopenharmony_ci </p> 42002f4aeb0Sopenharmony_ci </dd> 42102f4aeb0Sopenharmony_ci <dt> 42202f4aeb0Sopenharmony_ci <span class="term"> 42302f4aeb0Sopenharmony_ci <code class="constant">EGL_RENDER_BUFFER</code> 42402f4aeb0Sopenharmony_ci </span> 42502f4aeb0Sopenharmony_ci </dt> 42602f4aeb0Sopenharmony_ci <dd> 42702f4aeb0Sopenharmony_ci <p> 42802f4aeb0Sopenharmony_ci Returns the buffer which client API rendering is 42902f4aeb0Sopenharmony_ci requested to use. For a window surface, this is the 43002f4aeb0Sopenharmony_ci same attribute value specified when the surface was 43102f4aeb0Sopenharmony_ci created. For a pbuffer surface, it is always 43202f4aeb0Sopenharmony_ci <code class="constant">EGL_BACK_BUFFER</code>. For a pixmap 43302f4aeb0Sopenharmony_ci surface, it is always 43402f4aeb0Sopenharmony_ci <code class="constant">EGL_SINGLE_BUFFER</code>. To determine 43502f4aeb0Sopenharmony_ci the actual buffer being rendered to by a context, 43602f4aeb0Sopenharmony_ci call 43702f4aeb0Sopenharmony_ci <a class="citerefentry" href="eglQueryContext.html"><span class="citerefentry"><span class="refentrytitle">eglQueryContext</span></span></a>. 43802f4aeb0Sopenharmony_ci </p> 43902f4aeb0Sopenharmony_ci </dd> 44002f4aeb0Sopenharmony_ci <dt> 44102f4aeb0Sopenharmony_ci <span class="term"> 44202f4aeb0Sopenharmony_ci <code class="constant">EGL_SWAP_BEHAVIOR</code> 44302f4aeb0Sopenharmony_ci </span> 44402f4aeb0Sopenharmony_ci </dt> 44502f4aeb0Sopenharmony_ci <dd> 44602f4aeb0Sopenharmony_ci <p> 44702f4aeb0Sopenharmony_ci Returns the effect on the color buffer when posting 44802f4aeb0Sopenharmony_ci a surface with 44902f4aeb0Sopenharmony_ci <a class="citerefentry" href="eglSwapBuffers.html"><span class="citerefentry"><span class="refentrytitle">eglSwapBuffers</span></span></a>. 45002f4aeb0Sopenharmony_ci Swap behavior may be either 45102f4aeb0Sopenharmony_ci <code class="constant">EGL_BUFFER_PRESERVED</code> or 45202f4aeb0Sopenharmony_ci <code class="constant">EGL_BUFFER_DESTROYED</code>, as 45302f4aeb0Sopenharmony_ci described for 45402f4aeb0Sopenharmony_ci <a class="citerefentry" href="eglSurfaceAttrib.html"><span class="citerefentry"><span class="refentrytitle">eglSurfaceAttrib</span></span></a>. 45502f4aeb0Sopenharmony_ci </p> 45602f4aeb0Sopenharmony_ci </dd> 45702f4aeb0Sopenharmony_ci <dt> 45802f4aeb0Sopenharmony_ci <span class="term"> 45902f4aeb0Sopenharmony_ci <code class="constant">EGL_TEXTURE_FORMAT</code> 46002f4aeb0Sopenharmony_ci </span> 46102f4aeb0Sopenharmony_ci </dt> 46202f4aeb0Sopenharmony_ci <dd> 46302f4aeb0Sopenharmony_ci <p> 46402f4aeb0Sopenharmony_ci Returns format of texture. Possible values are 46502f4aeb0Sopenharmony_ci <code class="constant">EGL_NO_TEXTURE</code>, 46602f4aeb0Sopenharmony_ci <code class="constant">EGL_TEXTURE_RGB</code>, and 46702f4aeb0Sopenharmony_ci <code class="constant">EGL_TEXTURE_RGBA</code>. 46802f4aeb0Sopenharmony_ci </p> 46902f4aeb0Sopenharmony_ci </dd> 47002f4aeb0Sopenharmony_ci <dt> 47102f4aeb0Sopenharmony_ci <span class="term"> 47202f4aeb0Sopenharmony_ci <code class="constant">EGL_TEXTURE_TARGET</code> 47302f4aeb0Sopenharmony_ci </span> 47402f4aeb0Sopenharmony_ci </dt> 47502f4aeb0Sopenharmony_ci <dd> 47602f4aeb0Sopenharmony_ci <p> 47702f4aeb0Sopenharmony_ci Returns type of texture. Possible values are 47802f4aeb0Sopenharmony_ci <code class="constant">EGL_NO_TEXTURE</code>, or 47902f4aeb0Sopenharmony_ci <code class="constant">EGL_TEXTURE_2D</code>. 48002f4aeb0Sopenharmony_ci </p> 48102f4aeb0Sopenharmony_ci </dd> 48202f4aeb0Sopenharmony_ci <dt> 48302f4aeb0Sopenharmony_ci <span class="term"> 48402f4aeb0Sopenharmony_ci <code class="constant">EGL_VERTICAL_RESOLUTION</code> 48502f4aeb0Sopenharmony_ci </span> 48602f4aeb0Sopenharmony_ci </dt> 48702f4aeb0Sopenharmony_ci <dd> 48802f4aeb0Sopenharmony_ci <p> 48902f4aeb0Sopenharmony_ci Returns the vertical dot pitch of the display on 49002f4aeb0Sopenharmony_ci which a window surface is visible. The value 49102f4aeb0Sopenharmony_ci returned is equal to the actual dot pitch, in 49202f4aeb0Sopenharmony_ci pixels/meter, multiplied by the constant value 49302f4aeb0Sopenharmony_ci <code class="constant">EGL_DISPLAY_SCALING</code>. 49402f4aeb0Sopenharmony_ci </p> 49502f4aeb0Sopenharmony_ci </dd> 49602f4aeb0Sopenharmony_ci <dt> 49702f4aeb0Sopenharmony_ci <span class="term"> 49802f4aeb0Sopenharmony_ci <code class="constant">EGL_WIDTH</code> 49902f4aeb0Sopenharmony_ci </span> 50002f4aeb0Sopenharmony_ci </dt> 50102f4aeb0Sopenharmony_ci <dd> 50202f4aeb0Sopenharmony_ci <p> 50302f4aeb0Sopenharmony_ci Returns the width of the surface in pixels. 50402f4aeb0Sopenharmony_ci </p> 50502f4aeb0Sopenharmony_ci </dd> 50602f4aeb0Sopenharmony_ci </dl> 50702f4aeb0Sopenharmony_ci </div> 50802f4aeb0Sopenharmony_ci </div> 50902f4aeb0Sopenharmony_ci <div class="refsect1"> 51002f4aeb0Sopenharmony_ci <a id="notes"></a> 51102f4aeb0Sopenharmony_ci <h2>Notes</h2> 51202f4aeb0Sopenharmony_ci <p> 51302f4aeb0Sopenharmony_ci Attribute <code class="constant">EGL_MULTISAMPLE_RESOLVE</code> is 51402f4aeb0Sopenharmony_ci supported only if the EGL version is 1.4 or greater. 51502f4aeb0Sopenharmony_ci </p> 51602f4aeb0Sopenharmony_ci <p> 51702f4aeb0Sopenharmony_ci Attributes <code class="constant">EGL_DISPLAY_SCALING</code>. 51802f4aeb0Sopenharmony_ci <code class="constant">EGL_HORIZONTAL_RESOLUTION</code>, 51902f4aeb0Sopenharmony_ci <code class="constant">EGL_PIXEL_ASPECT_RATIO</code>, 52002f4aeb0Sopenharmony_ci <code class="constant">EGL_RENDER_BUFFER</code>, 52102f4aeb0Sopenharmony_ci <code class="constant">EGL_SWAP_BEHAVIOR</code>, and 52202f4aeb0Sopenharmony_ci <code class="constant">EGL_VERTICAL_RESOLUTION</code> are supported 52302f4aeb0Sopenharmony_ci only if the EGL version is 1.2 or greater. 52402f4aeb0Sopenharmony_ci </p> 52502f4aeb0Sopenharmony_ci <p> 52602f4aeb0Sopenharmony_ci Querying attributes <code class="constant">EGL_TEXTURE_FORMAT</code>, 52702f4aeb0Sopenharmony_ci <code class="constant">EGL_TEXTURE_TARGET</code>, 52802f4aeb0Sopenharmony_ci <code class="constant">EGL_MIPMAP_TEXTURE</code>, or 52902f4aeb0Sopenharmony_ci <code class="constant">EGL_MIPMAP_LEVEL</code> for a non-pbuffer 53002f4aeb0Sopenharmony_ci surface is not an error, but <em class="parameter"><code>value</code></em> is 53102f4aeb0Sopenharmony_ci not modified. 53202f4aeb0Sopenharmony_ci </p> 53302f4aeb0Sopenharmony_ci <p> 53402f4aeb0Sopenharmony_ci <code class="constant">EGL_DISPLAY_SCALING</code> is the constant 53502f4aeb0Sopenharmony_ci value 10000. Floating-point values such as resolution and 53602f4aeb0Sopenharmony_ci pixel aspect ratio are scaled by this value before being 53702f4aeb0Sopenharmony_ci returned as integers so that sufficient precision to be 53802f4aeb0Sopenharmony_ci meaningful will be retained in the returned value. 53902f4aeb0Sopenharmony_ci </p> 54002f4aeb0Sopenharmony_ci <p> 54102f4aeb0Sopenharmony_ci For an offscreen (pbuffer or pixmap) surface, or a surface 54202f4aeb0Sopenharmony_ci whose pixel dot pitch or aspect ratio are unknown, querying 54302f4aeb0Sopenharmony_ci <code class="constant">EGL_HORIZONTAL_RESOLUTION</code>, 54402f4aeb0Sopenharmony_ci <code class="constant">EGL_PIXEL_ASPECT_RATIO</code>, or 54502f4aeb0Sopenharmony_ci <code class="constant">EGL_VERTICAL_RESOLUTION</code> will return the 54602f4aeb0Sopenharmony_ci constant value <code class="constant">EGL_UNKNOWN</code> (-1). 54702f4aeb0Sopenharmony_ci </p> 54802f4aeb0Sopenharmony_ci </div> 54902f4aeb0Sopenharmony_ci <div class="refsect1"> 55002f4aeb0Sopenharmony_ci <a id="errors"></a> 55102f4aeb0Sopenharmony_ci <h2>Errors</h2> 55202f4aeb0Sopenharmony_ci <p> 55302f4aeb0Sopenharmony_ci <code class="constant">EGL_FALSE</code> is returned on failure, 55402f4aeb0Sopenharmony_ci <code class="constant">EGL_TRUE</code> otherwise. 55502f4aeb0Sopenharmony_ci <em class="parameter"><code>value</code></em> is not modified when 55602f4aeb0Sopenharmony_ci <code class="constant">EGL_FALSE</code> is returned. 55702f4aeb0Sopenharmony_ci </p> 55802f4aeb0Sopenharmony_ci <p> 55902f4aeb0Sopenharmony_ci <code class="constant">EGL_BAD_DISPLAY</code> is generated if 56002f4aeb0Sopenharmony_ci <em class="parameter"><code>display</code></em> is not an EGL display connection. 56102f4aeb0Sopenharmony_ci </p> 56202f4aeb0Sopenharmony_ci <p> 56302f4aeb0Sopenharmony_ci <code class="constant">EGL_NOT_INITIALIZED</code> is generated if 56402f4aeb0Sopenharmony_ci <em class="parameter"><code>display</code></em> has not been initialized. 56502f4aeb0Sopenharmony_ci </p> 56602f4aeb0Sopenharmony_ci <p> 56702f4aeb0Sopenharmony_ci <code class="constant">EGL_BAD_SURFACE</code> is generated if 56802f4aeb0Sopenharmony_ci <em class="parameter"><code>surface</code></em> is not an EGL surface. 56902f4aeb0Sopenharmony_ci </p> 57002f4aeb0Sopenharmony_ci <p> 57102f4aeb0Sopenharmony_ci <code class="constant">EGL_BAD_ATTRIBUTE</code> is generated if 57202f4aeb0Sopenharmony_ci <em class="parameter"><code>attribute</code></em> is not a valid surface attribute. 57302f4aeb0Sopenharmony_ci </p> 57402f4aeb0Sopenharmony_ci </div> 57502f4aeb0Sopenharmony_ci <div class="refsect1"> 57602f4aeb0Sopenharmony_ci <a id="seealso"></a> 57702f4aeb0Sopenharmony_ci <h2>See Also</h2> 57802f4aeb0Sopenharmony_ci <p> 57902f4aeb0Sopenharmony_ci <a class="citerefentry" href="eglCreatePbufferSurface.html"><span class="citerefentry"><span class="refentrytitle">eglCreatePbufferSurface</span></span></a>, 58002f4aeb0Sopenharmony_ci <a class="citerefentry" href="eglCreatePixmapSurface.html"><span class="citerefentry"><span class="refentrytitle">eglCreatePixmapSurface</span></span></a>, 58102f4aeb0Sopenharmony_ci <a class="citerefentry" href="eglCreateWindowSurface.html"><span class="citerefentry"><span class="refentrytitle">eglCreateWindowSurface</span></span></a>, 58202f4aeb0Sopenharmony_ci <a class="citerefentry" href="eglSurfaceAttrib.html"><span class="citerefentry"><span class="refentrytitle">eglSurfaceAttrib</span></span></a>, 58302f4aeb0Sopenharmony_ci <a class="citerefentry" href="eglSwapBuffers.html"><span class="citerefentry"><span class="refentrytitle">eglSwapBuffers</span></span></a> 58402f4aeb0Sopenharmony_ci </p> 58502f4aeb0Sopenharmony_ci </div> 58602f4aeb0Sopenharmony_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> 58702f4aeb0Sopenharmony_ciCopyright © 2003-2014 The Khronos Group Inc. 58802f4aeb0Sopenharmony_ciPermission is hereby granted, free of charge, to any person obtaining a 58902f4aeb0Sopenharmony_cicopy of this software and/or associated documentation files (the 59002f4aeb0Sopenharmony_ci"Materials"), to deal in the Materials without restriction, including 59102f4aeb0Sopenharmony_ciwithout limitation the rights to use, copy, modify, merge, publish, 59202f4aeb0Sopenharmony_cidistribute, sublicense, and/or sell copies of the Materials, and to 59302f4aeb0Sopenharmony_cipermit persons to whom the Materials are furnished to do so, subject to 59402f4aeb0Sopenharmony_cithe condition that this copyright notice and permission notice shall be included 59502f4aeb0Sopenharmony_ciin all copies or substantial portions of the Materials. 59602f4aeb0Sopenharmony_ci</div> 59702f4aeb0Sopenharmony_ci </div> 59802f4aeb0Sopenharmony_ci </body> 59902f4aeb0Sopenharmony_ci</html> 600
