| 1 | <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
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| 2 | <html lang="en">
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| 3 | <head>
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| 4 | <meta http-equiv="content-type" content="text/html; charset=utf-8">
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| 5 | <title>Gallium Post-processing</title>
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| 6 | <link rel="stylesheet" type="text/css" href="mesa.css">
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| 7 | </head>
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| 8 | <body>
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| 9 |
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| 10 | <div class="header">
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| 11 | <h1>The Mesa 3D Graphics Library</h1>
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| 12 | </div>
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| 13 |
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| 14 | <iframe src="contents.html"></iframe>
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| 15 | <div class="content">
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| 16 |
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| 17 | <h1>Gallium Post-processing</h1>
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| 18 |
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| 19 | <p>
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| 20 | The Gallium drivers support user-defined image post-processing.
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| 21 | At the end of drawing a frame a post-processing filter can be applied to
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| 22 | the rendered image.
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| 23 | Example filters include morphological antialiasing and cell shading.
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| 24 | </p>
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| 25 |
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| 26 | <p>
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| 27 | The filters can be toggled per-app via driconf, or per-session via the
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| 28 | corresponding environment variables.
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| 29 | </p>
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| 30 |
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| 31 | <p>
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| 32 | Multiple filters can be used together.
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| 33 | </p>
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| 34 |
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| 35 |
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| 36 | <h2>PP environment variables</h2>
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| 37 |
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| 38 | <ul>
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| 39 | <li>PP_DEBUG - If defined debug information will be printed to stderr.
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| 40 | </ul>
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| 41 |
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| 42 | <h2>Current filters</h2>
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| 43 |
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| 44 | <ul>
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| 45 | <li>pp_nored, pp_nogreen, pp_noblue - set to 1 to remove the corresponding color channel.
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| 46 | These are basic filters for easy testing of the PP queue.
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| 47 | <li>pp_jimenezmlaa, pp_jimenezmlaa_color -
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| 48 | <a href="https://www.iryokufx.com/mlaa/" target=_blank>Jimenez's MLAA</a>
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| 49 | is a morphological antialiasing filter.
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| 50 | The two versions use depth and color data, respectively.
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| 51 | Which works better depends on the app - depth will not blur text, but it will
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| 52 | miss transparent textures for example.
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| 53 | Set to a number from 2 to 32, roughly corresponding to quality.
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| 54 | Numbers higher than 8 see minimizing gains.
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| 55 | <li>pp_celshade - set to 1 to enable cell shading (a more complex color filter).
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| 56 | </ul>
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| 57 |
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| 58 |
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| 59 | <br>
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| 60 | <br>
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| 61 |
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| 62 | </div>
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| 63 | </body>
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| 64 | </html>
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