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authorjjesswan <jessica_wan@brown.edu>2024-04-22 21:56:26 -0400
committerjjesswan <jessica_wan@brown.edu>2024-04-22 21:56:26 -0400
commita556b45abf18f1bd509daaf63b66b7d55e9fd291 (patch)
treebc9b8a2d184c12aee236e7f9f276a34b84ca552d /engine-ocean/External/glew/auto/EGL-Registry/sdk/docs/man/xhtml/eglCreateContext.html
parentcd7c76017a12bb548036571c1ff13e551369d06d (diff)
add engine version
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+ <title>eglCreateContext</title>
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+ </head>
+ <body>
+ <div class="refentry">
+ <a id="eglCreateContext"></a>
+ <div class="titlepage"></div>
+ <div xmlns="" class="refnamediv">
+ <h1>eglCreateContext</h1>
+ <p>
+ create a new <acronym xmlns="http://www.w3.org/1999/xhtml" class="acronym">EGL</acronym> rendering context
+ </p>
+ </div>
+ <div class="refsynopsisdiv">
+ <h2>C Specification</h2>
+ <div class="funcsynopsis">
+ <table xmlns="" border="0" summary="Function synopsis" cellspacing="0" cellpadding="0">
+ <tr valign="bottom">
+ <td>
+ <code xmlns="http://www.w3.org/1999/xhtml" class="funcdef">EGLContext <strong class="fsfunc">eglCreateContext</strong>(</code>
+ <td>EGLDisplay  <var xmlns="http://www.w3.org/1999/xhtml" class="pdparam">display</var>, </td>
+ </td>
+ </tr>
+ <tr valign="top">
+ <td> </td>
+ <td>EGLConfig  <var xmlns="http://www.w3.org/1999/xhtml" class="pdparam">config</var>, </td>
+ </tr>
+ <tr valign="top">
+ <td> </td>
+ <td>EGLContext  <var xmlns="http://www.w3.org/1999/xhtml" class="pdparam">share_context</var>, </td>
+ </tr>
+ <tr valign="top">
+ <td> </td>
+ <td>EGLint const *  <var xmlns="http://www.w3.org/1999/xhtml" class="pdparam">attrib_list</var><code>)</code></td>
+ </tr>
+ </table>
+ </div>
+ </div>
+ <div class="refsect1">
+ <a id="parameters"></a>
+ <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
+ <acronym class="acronym">EGL</acronym>
+ display connection.
+ </p>
+ </dd>
+ <dt>
+ <span class="term">
+ <em class="parameter">
+ <code>config</code>
+ </em>
+ </span>
+ </dt>
+ <dd>
+ <p>Specifies the EGL frame buffer configuration that
+ defines the frame buffer resource available to the rendering context.
+ </p>
+ </dd>
+ <dt>
+ <span class="term">
+ <em class="parameter">
+ <code>share_context</code>
+ </em>
+ </span>
+ </dt>
+ <dd>
+ <p>
+ Specifies another
+ <acronym class="acronym">EGL</acronym>
+ rendering context with which to share data, as
+ defined by the client API corresponding to the
+ contexts. Data is also shared with all other
+ contexts with which
+ <em class="parameter"><code>share_context</code></em> shares data.
+ <code class="constant">EGL_NO_CONTEXT</code> indicates that
+ no sharing is to take place.
+ </p>
+ </dd>
+ <dt>
+ <span class="term">
+ <em class="parameter">
+ <code>attrib_list</code>
+ </em>
+ </span>
+ </dt>
+ <dd>
+ <p>
+ Specifies attributes and attribute values for the
+ context being created. Only the attribute
+ <code class="constant">EGL_CONTEXT_CLIENT_VERSION</code> may
+ be specified.
+ </p>
+ </dd>
+ </dl>
+ </div>
+ </div>
+ <div class="refsect1">
+ <a id="description"></a>
+ <h2>Description</h2>
+ <p>
+ <code class="function">eglCreateContext</code> creates an EGL
+ rendering context for the current rendering API (as set with
+ <code class="function">eglBindAPI</code>) and returns a handle to the
+ context. The context can then be used to render into an EGL
+ drawing surface. If <code class="function">eglCreateContext</code>
+ fails to create a rendering context,
+ <code class="constant">EGL_NO_CONTEXT</code> is returned.
+ </p>
+ <p>
+ If <em class="parameter"><code>share_context</code></em> is not
+ <code class="constant">EGL_NO_CONTEXT</code>, then all shareable data
+ in the context (as defined by the client API specification
+ for the current rendering API) are shared by context
+ <em class="parameter"><code>share_context</code></em>, all other contexts
+ <em class="parameter"><code>share_context</code></em> already shares with,
+ and the newly created context. An arbitrary number of
+ rendering contexts can share data. However, all rendering
+ contexts that share data must themselves exist in the same
+ address space. Two rendering contexts share an address space
+ if both are owned by a single process.
+ </p>
+ <p>
+ <em class="parameter"><code>attrib_list</code></em> specifies a list of
+ attributes for the context. The list has the same structure
+ as described for <code class="function">eglChooseConfig</code>. The
+ attributes and attribute values which may be specified are
+ as follows:
+ </p>
+ <div class="variablelist">
+ <dl class="variablelist">
+ <dt>
+ <span class="term">
+ <code class="constant">EGL_CONTEXT_CLIENT_VERSION</code>
+ </span>
+ </dt>
+ <dd>
+ <p>
+ Must be followed by an integer that determines which
+ version of an OpenGL ES context to create. A value
+ of 1 specifies creation of an OpenGL ES 1.x context.
+ An attribute value of 2 specifies creation of an
+ OpenGL ES 2.x context. The default value is 1. This
+ attribute can only be specified when creating a
+ OpenGL ES context (e.g. when the current rendering
+ API is <code class="constant">EGL_OPENGL_ES_API</code>).
+ </p>
+ </dd>
+ </dl>
+ </div>
+ </div>
+ <div class="refsect1">
+ <a id="notes"></a>
+ <h2>Notes</h2>
+ <p>
+ The current rendering API is only respected if the EGL
+ version is 1.2 or greater. Otherwise, an OpenGL ES context
+ will always be created.
+ </p>
+ <p>
+ The <code class="constant">EGL_CONTEXT_CLIENT_VERSION</code>
+ attribute is only supported if the EGL version is 1.3 or
+ greater.
+ </p>
+ <p>
+ A <em class="firstterm">process</em> is a single execution environment,
+ implemented in a single address space, consisting of one or more threads.
+ </p>
+ <p>
+ A <em class="firstterm">thread</em> is one of a set of subprocesses that
+ share a single address space, but maintain separate program counters,
+ stack spaces, and other related global data.
+ A thread is the only member of its subprocess group is equivalent to a
+ process.
+ </p>
+ </div>
+ <div class="refsect1">
+ <a id="errors"></a>
+ <h2>Errors</h2>
+ <p>
+ <code class="constant">EGL_NO_CONTEXT</code> is returned if creation of
+ the context fails.
+ </p>
+ <p>
+ <code class="constant">EGL_BAD_MATCH</code> is generated if the
+ current rendering API is <code class="constant">EGL_NONE</code> (this
+ can only arise in an EGL implementation which does not
+ support OpenGL ES, prior to the first call to
+ <code class="function">eglBindAPI</code>).
+ </p>
+ <p>
+ <code class="constant">EGL_BAD_MATCH</code> is generated if the
+ server context state for
+ <em class="parameter"><code>share_context</code></em> exists in an address
+ space which cannot be shared with the newly created context,
+ if <em class="parameter"><code>share_context</code></em> was created on a
+ different display than the one referenced by
+ <em class="parameter"><code>config</code></em>, or if the contexts are
+ otherwise incompatible.
+ </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_NOT_INITIALIZED</code> is generated if
+ <em class="parameter"><code>display</code></em> has not been initialized.
+ </p>
+ <p>
+ <code class="constant">EGL_BAD_CONFIG</code> is generated if
+ <em class="parameter"><code>config</code></em> is not an EGL frame buffer
+ configuration, or does not support the current rendering
+ API. This includes requesting creation of an OpenGL ES 1.x
+ context when the <code class="constant">EGL_RENDERABLE_TYPE</code>
+ attribute of <em class="parameter"><code>config</code></em> does not contain
+ <code class="constant">EGL_OPENGL_ES_BIT</code>, or creation of an
+ OpenGL ES 2.x context when the attribute does not contain
+ <code class="constant">EGL_OPENGL_ES2_BIT</code>.
+ </p>
+ <p>
+ <code class="constant">EGL_BAD_CONTEXT</code> is generated if
+ <em class="parameter"><code>share_context</code></em> is not an EGL rendering
+ context of the same client API type as the newly created
+ context and is not <code class="constant">EGL_NO_CONTEXT</code>.
+ </p>
+ <p>
+ <code class="constant">EGL_BAD_ATTRIBUTE</code> is generated if
+ <em class="parameter"><code>attrib_list</code></em> contains an invalid
+ context attribute or if an attribute is not recognized or
+ out of range. Note that attribute
+ <code class="constant">EGL_CONTEXT_CLIENT_VERSION</code> is
+ only valid when the current rendering API is
+ <code class="constant">EGL_OPENGL_ES_API</code>.
+ </p>
+ <p>
+ <code class="constant">EGL_BAD_ALLOC</code> is generated if there are not
+ enough resources to allocate the new context.
+ </p>
+ </div>
+ <div class="refsect1">
+ <a id="seealso"></a>
+ <h2>See Also</h2>
+ <p>
+ <a class="citerefentry" href="eglDestroyContext.html"><span class="citerefentry"><span class="refentrytitle">eglDestroyContext</span></span></a>,
+ <a class="citerefentry" href="eglChooseConfig.html"><span class="citerefentry"><span class="refentrytitle">eglChooseConfig</span></span></a>,
+ <a class="citerefentry" href="eglGetConfigs.html"><span class="citerefentry"><span class="refentrytitle">eglGetConfigs</span></span></a>,
+ <a class="citerefentry" href="eglMakeCurrent.html"><span class="citerefentry"><span class="refentrytitle">eglMakeCurrent</span></span></a>
+ </p>
+ </div>
+ <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>
+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.
+</div>
+ </div>
+ </body>
+</html>
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