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1 | <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "xhtml1-transitional.dtd"> |
2 | <!-- saved from url=(0013)about:internet --> | |
3 | <?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" pref:renderer="mathplayer-dl"><head><meta http-equiv="Content-Type" content="text/html; charset=UTF-8" /><title>glXImportContextEXT</title><meta name="generator" content="DocBook XSL Stylesheets V1.73.2" /></head><body><div class="refentry" lang="en" xml:lang="en"><a id="glXImportContextEXT"></a><div class="titlepage"></div><div class="refnamediv"><h2>Name</h2><p>glXImportContextEXT — import another process's indirect rendering context.</p></div><div class="refsynopsisdiv"><h2>C Specification</h2><div class="funcsynopsis"><table border="0" summary="Function synopsis" cellspacing="0" cellpadding="0"><tr><td><code class="funcdef">GLXContext <b class="fsfunc">glXImportContextEXT</b>(</code></td><td>Display * </td><td><var class="pdparam">dpy</var>, </td></tr><tr><td> </td><td>GLXContextID </td><td><var class="pdparam">contextID</var><code>)</code>;</td></tr></table></div></div><div class="refsect1" lang="en" xml:lang="en"><a id="parameters"></a><h2>Parameters</h2><div class="variablelist"><dl><dt><span class="term"><em class="parameter"><code>dpy</code></em></span></dt><dd><p> | |
4 | Specifies the connection to the X server. | |
5 | </p></dd><dt><span class="term"><em class="parameter"><code>contextID</code></em></span></dt><dd><p> | |
6 | Specifies a GLX rendering context. | |
7 | </p></dd></dl></div></div><div class="refsect1" lang="en" xml:lang="en"><a id="description"></a><h2>Description</h2><p> | |
8 | <code class="function">glXImportContextEXT</code> creates a GLXContext given the XID of an existing GLXContext. | |
9 | It may be used in place of <a class="citerefentry" href="glXCreateContext.xml"><span class="citerefentry"><span class="refentrytitle">glXCreateContext</span></span></a>, | |
10 | to share another process's indirect rendering context. | |
11 | </p><p> | |
12 | Only the server-side context information can be shared between | |
13 | X clients; client-side state, such as pixel storage modes, | |
14 | cannot be shared. Thus, <code class="function">glXImportContextEXT</code> must allocate memory to store | |
15 | client-side information. This memory is freed by calling | |
16 | <a class="citerefentry" href="glXFreeContextEXT.xml"><span class="citerefentry"><span class="refentrytitle">glXFreeContextEXT</span></span></a>. | |
17 | </p><p> | |
18 | This call does not create a new XID. It merely makes an | |
19 | existing object available to the importing client (Display *). | |
20 | Like any XID, it goes away when the creating client drops its | |
21 | connection or the ID is explicitly deleted. Note that this is | |
22 | when the XID goes away. The object goes away when the XID | |
23 | goes away AND the context is not current to any thread. | |
24 | </p><p> | |
25 | If <em class="parameter"><code>contextID</code></em> refers to a | |
26 | direct rendering context then no error is generated but | |
27 | <code class="function">glXImportContextEXT</code> returns NULL. | |
28 | </p><p> | |
29 | <code class="function">glXImportContextEXT</code> is part of the <code class="code">EXT_import_context</code> extension, | |
30 | not part of the core GLX command set. If _glxextstring(EXT_import_context) | |
31 | is included in the string returned by <a class="citerefentry" href="glXQueryExtensionsString.xml"><span class="citerefentry"><span class="refentrytitle">glXQueryExtensionsString</span></span></a>, | |
32 | when called with argument <code class="constant">GLX_EXTENSIONS</code>, | |
33 | extension <code class="code">EXT_import_context</code> is supported. | |
34 | </p></div><div class="refsect1" lang="en" xml:lang="en"><a id="errors"></a><h2>Errors</h2><p> | |
35 | <code class="constant">GLXBadContext</code> is generated if <em class="parameter"><code>contextID</code></em> does not | |
36 | refer to a valid context. | |
37 | </p></div><div class="refsect1" lang="en" xml:lang="en"><a id="seealso"></a><h2>See Also</h2><p> | |
38 | <a class="citerefentry" href="glXCreateContext.xml"><span class="citerefentry"><span class="refentrytitle">glXCreateContext</span></span></a>, | |
39 | <a class="citerefentry" href="glXQueryVersion.xml"><span class="citerefentry"><span class="refentrytitle">glXQueryVersion</span></span></a>, | |
40 | <a class="citerefentry" href="glXQueryExtensionsString.xml"><span class="citerefentry"><span class="refentrytitle">glXQueryExtensionsString</span></span></a>, | |
41 | <a class="citerefentry" href="glXGetContextIDEXT.xml"><span class="citerefentry"><span class="refentrytitle">glXGetContextIDEXT</span></span></a>, | |
42 | <a class="citerefentry" href="glXFreeContextEXT.xml"><span class="citerefentry"><span class="refentrytitle">glXFreeContextEXT</span></span></a> | |
43 | </p></div><div class="refsect1" lang="en" xml:lang="en"><a id="Copyright"></a><h2>Copyright</h2><p> | |
44 | Copyright <span class="trademark"></span>© 1991-2006 | |
45 | Silicon Graphics, Inc. This document is licensed under the SGI | |
46 | Free Software B License. For details, see | |
47 | <a class="ulink" href="http://oss.sgi.com/projects/FreeB/" target="_top">http://oss.sgi.com/projects/FreeB/</a>. | |
48 | </p></div></div></body></html> |