docs/postprocess.html

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   3 <TITLE>Gallium Post-processing</TITLE>
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   9 <H1>Gallium Post-processing</H1>
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  11 <p>
  12 The Gallium drivers support user-defined image post-processing.
  13 At the end of drawing a frame a post-processing filter can be applied to
  14 the rendered image.
  15 Example filters include morphological antialiasing and cell shading.
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  19 The filters can be toggled per-app via driconf, or per-session via the
  20 corresponding environment variables.
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  24 Multiple filters can be used together.
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  28 <H2>PP environment variables</H2>
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  30 <ul>
  31 <li>PP_DEBUG - If defined debug information will be printed to stderr.
  32 </ul>
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  34 <h2>Current filters</h2>
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  36 <ul>
  37 <li>pp_nored, pp_nogreen, pp_noblue - set to 1 to remove the corresponding color channel.
  38 These are basic filters for easy testing of the PP queue.
  39 <li>pp_jimenezmlaa, pp_jimenezmlaa_color -
  40 <a href="http://www.iryokufx.com/mlaa/" target=_blank>Jimenez's MLAA</a>
  41 is a morphological antialiasing filter.
  42 The two versions use depth and color data, respectively.
  43 Which works better depends on the app - depth will not blur text, but it will
  44 miss transparent textures for example.
  45 Set to a number from 2 to 32, roughly corresponding to quality.
  46 Numbers higher than 8 see minimizing gains.
  47 <li>pp_celshade - set to 1 to enable cell shading (a more complex color filter).
  48 </ul>
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