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89 lines
3.7 KiB
XML
89 lines
3.7 KiB
XML
<!DOCTYPE refentry [ <!ENTITY % mathent SYSTEM "math.ent"> %mathent; ]>
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<!-- Converted by db4-upgrade version 1.1 -->
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<refentry xmlns="http://docbook.org/ns/docbook" version="5.0" xml:id="glFlush">
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<info>
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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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<copyright>
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<year>2010-2014</year>
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<holder>Khronos Group</holder>
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</copyright>
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</info>
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<refmeta>
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<refentrytitle>glFlush</refentrytitle>
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<manvolnum>3G</manvolnum>
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</refmeta>
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<refnamediv>
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<refname>glFlush</refname>
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<refpurpose>force execution of GL commands in finite time</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>void <function>glFlush</function></funcdef>
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<paramdef> <parameter>void</parameter></paramdef>
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</funcprototype>
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</funcsynopsis>
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</refsynopsisdiv>
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<refsect1 xml:id="description"><title>Description</title>
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<para>
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Different GL implementations buffer commands in several different locations,
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including network buffers and the graphics accelerator itself.
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<function>glFlush</function> empties all of these buffers,
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causing all issued commands to be executed as quickly as
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they are accepted by the actual rendering engine.
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Though this execution may not be completed in any particular
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time period,
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it does complete in finite time.
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</para>
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<para>
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Because any GL program might be executed over a network,
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or on an accelerator that buffers commands,
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all programs should call <function>glFlush</function> whenever they count on having
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all of their previously issued commands completed.
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For example,
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call <function>glFlush</function> before waiting for user input that depends on
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the generated image.
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</para>
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</refsect1>
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<refsect1 xml:id="notes"><title>Notes</title>
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<para>
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<function>glFlush</function> can return at any time.
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It does not wait until the execution of all previously
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issued GL commands is complete.
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</para>
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</refsect1>
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<refsect1 xml:id="versions">
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<title>API Version Support</title>
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<informaltable>
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<tgroup cols="3" align="left">
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<xi:include xmlns:xi="http://www.w3.org/2001/XInclude" href="apifunchead.xml" xpointer="xpointer(/*/*)"/>
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<tbody>
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<row>
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<entry>glFlush</entry>
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<xi:include xmlns:xi="http://www.w3.org/2001/XInclude" href="apiversion.xml" xpointer="xpointer(/*/*[@role='es20']/*)"/>
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</row>
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</tbody>
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</tgroup>
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</informaltable>
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</refsect1>
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<refsect1 xml:id="seealso"><title>See Also</title>
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<para>
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<citerefentry><refentrytitle>glFinish</refentrytitle></citerefentry>
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</para>
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</refsect1>
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<refsect1 xml:id="Copyright"><title>Copyright</title>
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<para>
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Copyright <trademark class="copyright"/> 1991-2006 Silicon Graphics, Inc.
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Copyright <trademark class="copyright"/> 2010-2014 Khronos Group.
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This document is licensed under the SGI Free Software B License.
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For details, see
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<link xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="http://oss.sgi.com/projects/FreeB/">http://oss.sgi.com/projects/FreeB/</link>.
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</para>
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</refsect1>
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</refentry>
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