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  • Committer: Bazaar Package Importer
  • Author(s): Morten Kjeldgaard
  • Date: 2008-05-06 16:19:15 UTC
  • Revision ID: james.westby@ubuntu.com-20080506161915-uynz7nftmfixu6bq
Tags: upstream-7.0.3
Import upstream version 7.0.3

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docs/pbuffers.html
 
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<HTML>
 
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<TITLE>PBuffer Rendering</TITLE>
 
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<link rel="stylesheet" type="text/css" href="mesa.css"></head>
 
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<BODY>
 
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<H1>PBuffer Rendering</H1>
 
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<p>
 
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Basically, FBconfigs and PBuffers allow you to do off-screen rendering
 
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with OpenGL.  The OSMesa interface does basically the same thing, but
 
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fbconfigs and pbuffers are supported by more vendors.
 
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PBuffer rendering may also be hardware accelerated.
 
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</p>
 
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<p>
 
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PBuffers are getting more use nowadays, though they've actually been
 
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around for a long time on IRIX systems and other workstations.
 
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</p>
 
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<p>
 
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The
 
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<a href="http://oss.sgi.com/projects/ogl-sample/registry/SGIX/fbconfig.txt"
 
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target="_parent">GL_SGIX_fbconfig</a>
 
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and
 
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<a href="http://oss.sgi.com/projects/ogl-sample/registry/SGIX/pbuffer.txt"
 
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target="_parent">
 
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GL_SGIX_pbuffer</a> extensions describe the functionality.
 
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More recently, these extensions have been promoted to ARB extensions (on
 
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Windows at least).
 
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</p>
 
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<p>
 
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The Mesa/progs/xdemos/ directory has some useful code for working
 
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with pbuffers:
 
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</p>
 
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<ul>
 
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<li><b>pbinfo.c</b> - like glxinfo, it prints a list of available
 
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    fbconfigs and whether each supports pbuffers.
 
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<li><b>pbutil.c</b> - a few utility functions for dealing with
 
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    fbconfigs and pbuffers.
 
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<li><b>pbdemo.c</b> - a demonstration of off-screen rendering with pbuffers.
 
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</ul>
 
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<p>
 
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Mesa 4.1 and later support GL_SGIX_fbconfig and GL_SGIX_pbuffer (software
 
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rendering only).
 
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</p>
 
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</BODY>
 
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</HTML>