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