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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>glFlush
</title><meta name=
"generator" content=
"DocBook XSL Stylesheets V1.73.2" /></head><body><div class=
"refentry" lang=
"en" xml:
lang=
"en"><a id=
"glFlush"></a><div class=
"titlepage"></div><div class=
"refnamediv"><h2>Name
</h2><p>glFlush — force execution of GL commands in finite time
</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">void
<b class=
"fsfunc">glFlush
</b>(
</code></td><td> </td><td><var class=
"pdparam">void
</var><code>)
</code>;
</td></tr></table></div></div><div class=
"refsect1" lang=
"en" xml:
lang=
"en"><a id=
"description"></a><h2>Description
</h2><p>
4 Different GL implementations buffer commands in several different locations,
5 including network buffers and the graphics accelerator itself.
6 <code class=
"function">glFlush
</code> empties all of these buffers,
7 causing all issued commands to be executed as quickly as
8 they are accepted by the actual rendering engine.
9 Though this execution may not be completed in any particular
11 it does complete in finite time.
13 Because any GL program might be executed over a network,
14 or on an accelerator that buffers commands,
15 all programs should call
<code class=
"function">glFlush
</code> whenever they count on having
16 all of their previously issued commands completed.
18 call
<code class=
"function">glFlush
</code> before waiting for user input that depends on
20 </p></div><div class=
"refsect1" lang=
"en" xml:
lang=
"en"><a id=
"notes"></a><h2>Notes
</h2><p>
21 <code class=
"function">glFlush
</code> can return at any time.
22 It does not wait until the execution of all previously
23 issued GL commands is complete.
24 </p></div><div class=
"refsect1" lang=
"en" xml:
lang=
"en"><a id=
"errors"></a><h2>Errors
</h2><p>
25 <code class=
"constant">GL_INVALID_OPERATION
</code> is generated if
<code class=
"function">glFlush
</code>
26 is executed between the execution of
<a class=
"citerefentry" href=
"glBegin.xml"><span class=
"citerefentry"><span class=
"refentrytitle">glBegin
</span></span></a>
27 and the corresponding execution of
<a class=
"citerefentry" href=
"glEnd.xml"><span class=
"citerefentry"><span class=
"refentrytitle">glEnd
</span></span></a>.
28 </p></div><div class=
"refsect1" lang=
"en" xml:
lang=
"en"><a id=
"seealso"></a><h2>See Also
</h2><p>
29 <a class=
"citerefentry" href=
"glFinish.xml"><span class=
"citerefentry"><span class=
"refentrytitle">glFinish
</span></span></a>
30 </p></div><div class=
"refsect1" lang=
"en" xml:
lang=
"en"><a id=
"Copyright"></a><h2>Copyright
</h2><p>
31 Copyright
<span class=
"trademark"></span>©
1991-
2006
32 Silicon Graphics, Inc. This document is licensed under the SGI
33 Free Software B License. For details, see
34 <a class=
"ulink" href=
"http://oss.sgi.com/projects/FreeB/" target=
"_top">http://oss.sgi.com/projects/FreeB/
</a>.
35 </p></div></div></body></html>