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107 lines
4.9 KiB
XML
107 lines
4.9 KiB
XML
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<?xml version="1.0" encoding="UTF-8"?>
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<!DOCTYPE book PUBLIC "-//OASIS//DTD DocBook MathML Module V1.1b1//EN"
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"http://www.oasis-open.org/docbook/xml/mathml/1.1CR1/dbmathml.dtd">
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<refentry id="glXImportContextEXT">
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<refmeta>
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<refmetainfo>
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<copyright>
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<year>1991-2006</year>
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<holder>Silicon Graphics, Inc.</holder>
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</copyright>
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</refmetainfo>
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<refentrytitle>glXImportContextEXT</refentrytitle>
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<manvolnum>3G</manvolnum>
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</refmeta>
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<refnamediv>
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<refname>glXImportContextEXT</refname>
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<refpurpose>import another process's indirect rendering context.</refpurpose>
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</refnamediv>
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<refsynopsisdiv><title>C Specification</title>
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<funcsynopsis>
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<funcprototype>
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<funcdef>GLXContext <function>glXImportContextEXT</function></funcdef>
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<paramdef>Display * <parameter>dpy</parameter></paramdef>
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<paramdef>GLXContextID <parameter>contextID</parameter></paramdef>
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</funcprototype>
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</funcsynopsis>
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</refsynopsisdiv>
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<!-- eqn: ignoring delim $$ -->
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<refsect1 id="parameters"><title>Parameters</title>
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<variablelist>
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<varlistentry>
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<term><parameter>dpy</parameter></term>
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<listitem>
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<para>
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Specifies the connection to the X server.
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</para>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term><parameter>contextID</parameter></term>
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<listitem>
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<para>
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Specifies a GLX rendering context.
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</para>
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</listitem>
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</varlistentry>
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</variablelist>
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</refsect1>
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<refsect1 id="description"><title>Description</title>
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<para>
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<function>glXImportContextEXT</function> creates a GLXContext given the XID of an existing GLXContext.
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It may be used in place of <citerefentry><refentrytitle>glXCreateContext</refentrytitle></citerefentry>,
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to share another process's indirect rendering context.
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</para>
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<para>
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Only the server-side context information can be shared between
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X clients; client-side state, such as pixel storage modes,
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cannot be shared. Thus, <function>glXImportContextEXT</function> must allocate memory to store
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client-side information. This memory is freed by calling
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<citerefentry><refentrytitle>glXFreeContextEXT</refentrytitle></citerefentry>.
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</para>
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<para>
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This call does not create a new XID. It merely makes an
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existing object available to the importing client (Display *).
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Like any XID, it goes away when the creating client drops its
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connection or the ID is explicitly deleted. Note that this is
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when the XID goes away. The object goes away when the XID
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goes away AND the context is not current to any thread.
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</para>
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<para>
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If <parameter>contextID</parameter> refers to a
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direct rendering context then no error is generated but
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<function>glXImportContextEXT</function> returns NULL.
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</para>
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<para>
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<function>glXImportContextEXT</function> is part of the <code>EXT_import_context</code> extension,
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not part of the core GLX command set. If _glxextstring(EXT_import_context)
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is included in the string returned by <citerefentry><refentrytitle>glXQueryExtensionsString</refentrytitle></citerefentry>,
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when called with argument <constant>GLX_EXTENSIONS</constant>,
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extension <code>EXT_import_context</code> is supported.
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</para>
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</refsect1>
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<refsect1 id="errors"><title>Errors</title>
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<para>
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<constant>GLXBadContext</constant> is generated if <parameter>contextID</parameter> does not
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refer to a valid context.
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</para>
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</refsect1>
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<refsect1 id="seealso"><title>See Also</title>
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<para>
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<citerefentry><refentrytitle>glXCreateContext</refentrytitle></citerefentry>,
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<citerefentry><refentrytitle>glXQueryVersion</refentrytitle></citerefentry>,
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<citerefentry><refentrytitle>glXQueryExtensionsString</refentrytitle></citerefentry>,
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<citerefentry><refentrytitle>glXGetContextIDEXT</refentrytitle></citerefentry>,
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<citerefentry><refentrytitle>glXFreeContextEXT</refentrytitle></citerefentry>
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</para>
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</refsect1>
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<refsect1 id="Copyright"><title>Copyright</title>
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<para>
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Copyright <trademark class="copyright"></trademark> 1991-2006
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Silicon Graphics, Inc. This document is licensed under the SGI
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Free Software B License. For details, see
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<ulink url="http://oss.sgi.com/projects/FreeB/">http://oss.sgi.com/projects/FreeB/</ulink>.
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</para>
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</refsect1>
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</refentry>
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