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third_party_mesa3d/docs/postprocess.html
Erik Faye-Lund ecdab0dfea docs: drop h1 in header
It's generally frowned upon to have more than one H1 per document in
HTML4. So let's put the text directly inside the header. This means we
can drop the flex-based centering, which makes things a bit easier. We
also need to change the padding to rem instead of em, because the em has
now changed.

Signed-off-by: Erik Faye-Lund <erik.faye-lund@collabora.com>
Reviewed-by: Eric Engestrom <eric.engestrom@intel.com>
2019-05-08 07:18:15 +00:00

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HTML

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html lang="en">
<head>
<meta http-equiv="content-type" content="text/html; charset=utf-8">
<title>Gallium Post-processing</title>
<link rel="stylesheet" type="text/css" href="mesa.css">
</head>
<body>
<div class="header">
The Mesa 3D Graphics Library
</div>
<iframe src="contents.html"></iframe>
<div class="content">
<h1>Gallium Post-processing</h1>
<p>
The Gallium drivers support user-defined image post-processing.
At the end of drawing a frame a post-processing filter can be applied to
the rendered image.
Example filters include morphological antialiasing and cell shading.
</p>
<p>
The filters can be toggled per-app via driconf, or per-session via the
corresponding environment variables.
</p>
<p>
Multiple filters can be used together.
</p>
<h2>PP environment variables</h2>
<ul>
<li>PP_DEBUG - If defined debug information will be printed to stderr.
</ul>
<h2>Current filters</h2>
<ul>
<li>pp_nored, pp_nogreen, pp_noblue - set to 1 to remove the corresponding color channel.
These are basic filters for easy testing of the PP queue.
<li>pp_jimenezmlaa, pp_jimenezmlaa_color -
<a href="https://www.iryokufx.com/mlaa/" target=_blank>Jimenez's MLAA</a>
is a morphological antialiasing filter.
The two versions use depth and color data, respectively.
Which works better depends on the app - depth will not blur text, but it will
miss transparent textures for example.
Set to a number from 2 to 32, roughly corresponding to quality.
Numbers higher than 8 see minimizing gains.
<li>pp_celshade - set to 1 to enable cell shading (a more complex color filter).
</ul>
<br>
<br>
</div>
</body>
</html>