upstream-man-pages/man4/xhtml/glFlush.xml

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   4 <?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" /><link rel="stylesheet" type="text/css" href="opengl-man.css" /><title>glFlush - OpenGL 4 Reference Pages</title><meta name="generator" content="DocBook XSL Stylesheets V1.69.1" /></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"><p><code class="funcdef">void <b class="fsfunc">glFlush</b>(</code> <var class="pdparam">void</var><code>)</code>;</p></div></div><div class="refsect1" lang="en" xml:lang="en"><a id="description"></a><h2>Description</h2><p>
   5             Different GL implementations buffer commands in several different locations,
   6             including network buffers and the graphics accelerator itself.
   7             <code class="function">glFlush</code> empties all of these buffers,
   8             causing all issued commands to be executed as quickly as
   9             they are accepted by the actual rendering engine.
  10             Though this execution may not be completed in any particular
  11             time period,
  12             it does complete in finite time.
  13         </p><p>
  14             Because any GL program might be executed over a network,
  15             or on an accelerator that buffers commands,
  16             all programs should call <code class="function">glFlush</code> whenever they count on having
  17             all of their previously issued commands completed.
  18             For example,
  19             call <code class="function">glFlush</code> before waiting for user input that depends on
  20             the generated image.
  21         </p></div><div class="refsect1" lang="en" xml:lang="en"><a id="notes"></a><h2>Notes</h2><p>
  22             <code class="function">glFlush</code> can return at any time.
  23             It does not wait until the execution of all previously
  24             issued GL commands is complete.
  25         </p></div><div class="refsect1" lang="en" xml:lang="en"><a id="seealso"></a><h2>See Also</h2><p>
  26             <a href="glFinish.xml"><span class="citerefentry"><span class="refentrytitle">glFinish</span></span></a>
  27         </p></div><div class="refsect1" lang="en" xml:lang="en"><a id="Copyright"></a><h2>Copyright</h2><p>
  28             Copyright <span class="trademark"></span>© 1991-2006
  29             Silicon Graphics, Inc. This document is licensed under the SGI
  30             Free Software B License. For details, see
  31             <a href="http://oss.sgi.com/projects/FreeB/" target="_top">http://oss.sgi.com/projects/FreeB/</a>.
  32         </p></div></div></body></html>