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  • Author : jsg
    Date : 2020-01-22 02:07:15
    Hash : 18af3bca
    Message : Import Mesa 19.2.8

  • lib/mesa/docs/debugging.html 
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  <title>Debugging Tips</title>
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<div class="header">
  The Mesa 3D Graphics Library
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<iframe src="contents.html"></iframe>
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<h1>Debugging Tips</h1>

<p>
   Normally Mesa (and OpenGL) records but does not notify the user of
   errors.  It is up to the application to call
   <code>glGetError</code> to check for errors.  Mesa supports an
   environment variable, <code>MESA_DEBUG</code>, to help with debugging.  If
   <code>MESA_DEBUG</code> is defined, a message will be printed to stdout
   whenever an error occurs.
</p>

<p>
   More extensive error checking is done in DEBUG builds
   (<code>--buildtype debug</code> for meson, <code>build=debug</code> for scons).
</p>
<p>
   In your debugger you can set a breakpoint in <code>_mesa_error()</code> to trap
   Mesa errors.
</p>
<p>
   There is a display list printing/debugging facility.  See the end of
   <code>src/dlist.c</code> for details.
</p>

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