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authorsotech117 <michael_foiani@brown.edu>2024-04-09 03:14:17 -0400
committersotech117 <michael_foiani@brown.edu>2024-04-09 03:14:17 -0400
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+<?xml version="1.0" encoding="UTF-8" standalone="no"?>
+<!DOCTYPE html><html xmlns="http://www.w3.org/1999/xhtml">
+ <head>
+ <title xmlns:xlink="http://www.w3.org/1999/xlink">eglSurfaceAttrib - EGL Reference Pages</title>
+ <link rel="stylesheet" type="text/css" href="khronos-man.css"/>
+ <meta name="generator" content="DocBook XSL Stylesheets V1.79.1"/>
+ </head>
+ <body>
+ <header/>
+ <div class="refentry" id="eglSurfaceAttrib">
+ <div class="titlepage"/>
+ <div class="refnamediv">
+ <h2>Name</h2>
+ <p>eglSurfaceAttrib —
+ set an <abbr class="acronym">EGL</abbr> surface attribute
+ </p>
+ </div>
+ <div class="refsynopsisdiv">
+ <h2>C Specification</h2>
+ <div class="funcsynopsis">
+ <table style="border: 0; cellspacing: 0; cellpadding: 0;" class="funcprototype-table">
+ <tr>
+ <td>
+ <code class="funcdef">EGLBoolean <strong class="fsfunc">eglSurfaceAttrib</strong>(</code>
+ </td>
+ <td>EGLDisplay <var class="pdparam">display</var>, </td>
+ </tr>
+ <tr>
+ <td> </td>
+ <td>EGLSurface <var class="pdparam">surface</var>, </td>
+ </tr>
+ <tr>
+ <td> </td>
+ <td>EGLint <var class="pdparam">attribute</var>, </td>
+ </tr>
+ <tr>
+ <td> </td>
+ <td>EGLint <var class="pdparam">value</var><code>)</code>;</td>
+ </tr>
+ </table>
+ <div class="funcprototype-spacer"> </div>
+ </div>
+ </div>
+ <div class="refsect1" id="parameters">
+ <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>surface</code>
+ </em>
+ </span>
+ </dt>
+ <dd>
+ <p>
+ Specifies the EGL surface.
+ </p>
+ </dd>
+ <dt>
+ <span class="term">
+ <em class="parameter">
+ <code>attribute</code>
+ </em>
+ </span>
+ </dt>
+ <dd>
+ <p>
+ Specifies the EGL surface attribute to set.
+ </p>
+ </dd>
+ <dt>
+ <span class="term">
+ <em class="parameter">
+ <code>value</code>
+ </em>
+ </span>
+ </dt>
+ <dd>
+ <p>
+ Specifies the attributes required value.
+ </p>
+ </dd>
+ </dl>
+ </div>
+ </div>
+ <div class="refsect1" id="description">
+ <h2>Description</h2>
+ <p>
+ <code class="function">eglSurfaceAttrib</code> sets the value of
+ <em class="parameter"><code>attribute</code></em> for
+ <em class="parameter"><code>surface</code></em> to
+ <em class="parameter"><code>value</code></em>.
+ <em class="parameter"><code>attribute</code></em> can be one of the
+ following:
+ </p>
+ <div class="variablelist">
+ <dl class="variablelist">
+ <dt>
+ <span class="term">
+ <code class="constant">EGL_MIPMAP_LEVEL</code>
+ </span>
+ </dt>
+ <dd>
+ <p>
+ For mipmap textures, the
+ <code class="constant">EGL_MIPMAP_LEVEL</code> attribute
+ indicates which level of the mipmap should be
+ rendered. If the value of this attribute is outside
+ the range of supported mipmap levels, the closest
+ valid mipmap level is selected for rendering. The
+ default value is <code class="constant">0</code>.
+ </p>
+ </dd>
+ <dt>
+ <span class="term">
+ <code class="constant">EGL_MULTISAMPLE_RESOLVE</code>
+ </span>
+ </dt>
+ <dd>
+ <p>
+ Specifies the filter to use when resolving the
+ multisample buffer (this may occur when swapping or
+ copying the surface, or when changing the client API
+ context bound to the surface). A
+ <em class="parameter"><code>value</code></em> of
+ <code class="constant">EGL_MULTISAMPLE_RESOLVE_DEFAULT</code>
+ chooses the default implementation-defined filtering
+ method, while
+ <code class="constant">EGL_MULTISAMPLE_RESOLVE_BOX</code>
+ chooses a one-pixel wide box filter placing equal
+ weighting on all multisample values.
+ </p>
+ <p>
+ The initial value of
+ <code class="constant">EGL_MULTISAMPLE_RESOLVE</code> is
+ <code class="constant">EGL_MULTISAMPLE_RESOLVE_DEFAULT</code>.
+ </p>
+ </dd>
+ <dt>
+ <span class="term">
+ <code class="constant">EGL_SWAP_BEHAVIOR</code>
+ </span>
+ </dt>
+ <dd>
+ <p>
+ Specifies the effect on the color buffer of posting
+ a surface with
+ <a class="citerefentry" href="eglSwapBuffers.xhtml"><span class="citerefentry"><span class="refentrytitle">eglSwapBuffers</span></span></a>.
+ A <em class="parameter"><code>value</code></em> of
+ <code class="constant">EGL_BUFFER_PRESERVED</code> indicates
+ that color buffer contents are unaffected, while
+ <code class="constant">EGL_BUFFER_DESTROYED</code> indicates
+ that color buffer contents may be destroyed or
+ changed by the operation.
+ </p>
+ <p>
+ The initial value of
+ <code class="constant">EGL_SWAP_BEHAVIOR</code> is chosen by
+ the implementation.
+ </p>
+ </dd>
+ </dl>
+ </div>
+ </div>
+ <div class="refsect1" id="notes">
+ <h2>Notes</h2>
+ <p>
+ Attribute <code class="constant">EGL_MULTISAMPLE_RESOLVE</code> is
+ supported only if the EGL version is 1.4 or greater.
+ </p>
+ <p>
+ Attribute <code class="constant">EGL_SWAP_BEHAVIOR</code> is
+ supported only if the EGL version is 1.2 or greater.
+ </p>
+ <p>
+ If the value of pbuffer attribute
+ <code class="constant">EGL_TEXTURE_FORMAT</code> is
+ <code class="constant">EGL_NO_TEXTURE</code>, the value of attribute
+ <code class="constant">EGL_TEXTURE_TARGET</code> is
+ <code class="constant">EGL_NO_TEXTURE</code>, or
+ <em class="parameter"><code>surface</code></em> is not a pbuffer, then
+ attribute <code class="constant">EGL_MIPMAP_LEVEL</code> may be set,
+ but has no effect.
+ </p>
+ </div>
+ <div class="refsect1" id="errors">
+ <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_DISPLAY</code> is generated if
+ <em class="parameter"><code>display</code></em> is not an EGL display connection.
+ </p>
+ <p>
+ <code class="constant">EGL_BAD_MATCH</code> is generated if
+ <em class="parameter"><code>attribute</code></em> is
+ <code class="constant">EGL_MULTISAMPLE_RESOLVE</code>,
+ <em class="parameter"><code>value</code></em> is
+ <code class="constant">EGL_MULTISAMPLE_RESOLVE_BOX</code>, and the
+ <code class="constant">EGL_SURFACE_TYPE</code> attribute of the
+ <span class="type">EGLConfig</span> used to create
+ <em class="parameter"><code>surface</code></em> does not contain
+ <code class="constant">EGL_MULTISAMPLE_RESOLVE_BOX_BIT</code>.
+ </p>
+ <p>
+ <code class="constant">EGL_BAD_MATCH</code> is generated if
+ <em class="parameter"><code>attribute</code></em> is
+ <code class="constant">EGL_SWAP_BEHAVIOR</code>,
+ <em class="parameter"><code>value</code></em> is
+ <code class="constant">EGL_BUFFER_PRESERVED</code>, and the
+ <code class="constant">EGL_SURFACE_TYPE</code> attribute of the
+ <span class="type">EGLConfig</span> used to create
+ <em class="parameter"><code>surface</code></em> does not contain
+ <code class="constant">EGL_SWAP_BEHAVIOR_PRESERVED_BIT</code>.
+ </p>
+ <p>
+ <code class="constant">EGL_NOT_INITIALIZED</code> is generated if
+ <em class="parameter"><code>display</code></em> has not been initialized.
+ </p>
+ <p>
+ <code class="constant">EGL_BAD_SURFACE</code> is generated if
+ <em class="parameter"><code>surface</code></em> is not an EGL surface.
+ </p>
+ <p>
+ <code class="constant">EGL_BAD_ATTRIBUTE</code> is generated if
+ <em class="parameter"><code>attribute</code></em> is not a valid surface attribute.
+ </p>
+ </div>
+ <div class="refsect1" id="seealso">
+ <h2>See Also</h2>
+ <p>
+ <a class="citerefentry" href="eglCreatePbufferSurface.xhtml"><span class="citerefentry"><span class="refentrytitle">eglCreatePbufferSurface</span></span></a>,
+ <a class="citerefentry" href="eglCreatePixmapSurface.xhtml"><span class="citerefentry"><span class="refentrytitle">eglCreatePixmapSurface</span></span></a>,
+ <a class="citerefentry" href="eglCreateWindowSurface.xhtml"><span class="citerefentry"><span class="refentrytitle">eglCreateWindowSurface</span></span></a>,
+ <a class="citerefentry" href="eglQuerySurface.xhtml"><span class="citerefentry"><span class="refentrytitle">eglQuerySurface</span></span></a>
+ </p>
+ </div>
+ <p>
+ </p>
+ <div class="refsect3" id="copyright">
+ <img src="KhronosLogo.jpg"/>
+ <p>
+ Copyright © 2003-2014 The Khronos Group Inc.
+ Permission is hereby granted, free of charge, to any person obtaining a
+ 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,
+ distribute, sublicense, and/or sell copies of the Materials, and to
+ permit persons to whom the Materials are furnished to do so, subject to
+ the condition that this copyright notice and permission notice shall be included
+ in all copies or substantial portions of the Materials.
+ </p>
+ </div>
+ <p>
+</p>
+ </div>
+ <footer/>
+ </body>
+</html>
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