[cairo] freetype font rendering difference between cairo 1.4 and 1.5

[Sylvain Pasche]

Hi,

I first saw this problem while using Firefox 3. The fonts it renders do 
not look that same as the other applications. I investigated this issue 
and found out that the difference is coming from the cairo version.

When using rgba aliasing and full hinting, cairo 1.5 is hinting fonts 
more aggressively and color fringes can appear.
Screenshot 1: [1] [2]
Screenshot 2: [3] (top is ff2 = cairo 1.4, bottom ff3 = cairo 1.5) [4]
another related mozilla bug: [5]

Is this considered a bug?

Sylvain


[1] https://bugzilla.mozilla.org/attachment.cgi?id=289646
[2] https://bugzilla.mozilla.org/show_bug.cgi?id=375591

[3] https://bugzilla.mozilla.org/attachment.cgi?id=289559
[4] https://bugzilla.mozilla.org/show_bug.cgi?id=404637

[5] https://bugzilla.mozilla.org/show_bug.cgi?id=400265