AGG: "fuzzy" lines at near horizontal/vertical angles ...

[Steve Lime]

There was an interesting thread on this topic on the Cairo mailing list
this past July. One of the drawbacks of the analytical AA approach is
with coincident lines of the same color. An alternative supersampling
approach was presented...

Check out the "polygon rasterization" threads here:

  http://lists.cairographics.org/archives/cairo/2007-July/thread.html#11092

It probably spills into August too.

Steve

>>> Flavio Hendry <flavio at TYDAC.CH> 01/08/08 9:57 AM >>>
Hi Thomas

> that's how the agg antialiasing works ...

Thanks. I was suspecting that ... The problem in this case is
"magnified" by the harsh contrast between black and white (on smooth
colors it does not "hit the eye" as much). I do not see any
amplification effect if there are two lines or just one however (same
layer, once as single lines and once as doubles looks exactly the same).

Mit freundlichem Gruss / Best Regards
Flavio Hendry

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