/[gzz]/manuscripts/AniFont/SCRATCH
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revision 1.2 by tjl, Wed Oct 22 09:38:05 2003 UTC revision 1.3 by tjl, Mon Oct 27 15:45:19 2003 UTC
# Line 66  methods, including trilinear, stretch-sq Line 66  methods, including trilinear, stretch-sq
66    stretch the texture in one direction, squish back by texture coordinates. activate    stretch the texture in one direction, squish back by texture coordinates. activate
67    the aniso filter. Aniso filters planned so that they don't flicker, either.    the aniso filter. Aniso filters planned so that they don't flicker, either.
68    
69    
70    
71    Recently, we were looking at increasing the resolution of the page
72    textures in our FenPDF system which shows PDF files in a fisheye view, using
73    2048x2048 textures for the pages.  
74    Hardware anisotropic filtering was
75    enabled in order for the fisheye transformation not to blur the textures.  
76    The pages were approximately
77    letter-size and already scaled vertically nearly to the maximum size,
78    but scaled isotropically in the texture.  
79    We decided to try to scale both axes to
80    the maximum extent, anisotropically, even though we suspected it might
81    degrade the image quality.
82    
83    However, it did not. To our great surprise, the image quality (the
84    readability of the text) actually \emph{improved significantly}.
85    

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