600978 - Font rendering degradation since layers.accelerate-all=true

Status: RESOLVED DUPLICATE of bug 582223

(Firefox :: General, defect)

Description

[Jürgen Kreileder]

User-Agent:       Mozilla/5.0 (Macintosh; Intel Mac OS X 10.6; rv:2.0b7pre) Gecko/20100930 Firefox/4.0b7pre
Build Identifier: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.6; rv:2.0b7pre) Gecko/20100930 Firefox/4.0b7pre

Since layers.accelerate-all has been turned on, some fonts are displayed rather ugly.

I'm attaching a screenshot which shows the problem on http://www.w3.org/TR/xbl/
Left side shows layers.accelerate-all=false, right side shows layers.accelerate-all=true.

The bad rendering is visible on the black and, especially, the blue text.  (The two header lines seem to be unaffected by the change.)

It looks like with layers.accelerate-all=true the font is rendered with non-subpixel anti-aliasing, layers.accelerate-all=false used subpixel anti-aliasing.

The default sans-serif font on the profile is Lucida Grande but I also see the problem on a new profile with Helvetica.


Reproducible: Always

Comment 1

[Jürgen Kreileder]

Attachment: Screenshot

Comment 3

[Jürgen Kreileder]

This is no duplicate of bug 594325.  This is about OS X, not Windows.  And the text doesn't look blurry, it looks blocky.

Comment 4

[philippe (part-time)]

This looks like a dupe of bug 582223.