370429 - text antialiasing broken

Status: RESOLVED DUPLICATE of bug 363861

(Core :: Layout: Text and Fonts, defect)

Description

[Carlo Alberto Ferraris]

User-Agent:       Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9a3pre) Gecko/20070214 Minefield/3.0a3pre
Build Identifier: Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9a3pre) Gecko/20070214 Minefield/3.0a3pre

The linked page shows a problem with 3.0a3 that is not present in 2.0.
Text in a div with opacity <> 1 looks ugly (due to wrong antialiasing, I guess).

Reproducible: Always

Steps to Reproduce:
Open the linked page
Actual Results:  
Text is rendered incorrectly

Expected Results:  
Text should be rendered as in fx2

Comment 1

[Carlo Alberto Ferraris]

Screenshots of the problem:
fx3.0a3 -> http://img59.imageshack.us/img59/3371/immaginejy7.jpg (text antialiasing broken)
fx2.0.0.1 -> http://img59.imageshack.us/img59/2952/immagine2lm1.jpg (text antialiasing working)

Comment 2

[Carlo Alberto Ferraris]

corrected page URL

Comment 3

[Carlo Alberto Ferraris]

After playing around with my CSS I discovered something more. The misbehaviour is linked with the opacity attribute.
Removing the opacity attribute from the CSS, the text is rendered correctly, otherwise it is not.
This is still true in fx3.0a7, even if it's a pretty serious layout bug.

Comment 4

[Carlo Alberto Ferraris]

fx3.0a7, <div> opacity not specfied
http://img209.imageshack.us/img209/2184/bugui4.png
fx3.0a7, <div> opacity set to 85%
http://img209.imageshack.us/img209/794/bug2vs3.png

Comment 5

[Carlo Alberto Ferraris]

Attachment: screenshot of the problem in fx3.0b1 (compared to IE7)

This still holds for fx3.0b1. IE7 shows no such problem.

Comment 6

[Martijn Wargers (dead)]

Is this still an issue?

Comment 7

[Carlo Alberto Ferraris]

Attachment: Screenshots of fx3 RC2

Top is with windows antialiasing set to standard, and opacity=0.5
Middle is with windows antialiasing set to cleartype, and opacity=0.5
Bottom is with windows antialiasing set to cleartype, and opacity=1
The problem is present even if a solid color is used as background (in the screenshot, an image is used)

Comment 8

[Carlo Alberto Ferraris]

Attachment: html file used for the screenshots above

Comment 10

[Carlo Alberto Ferraris]

forgot to mention: the problem depicted in the first attachment to this bug still exists in RC2 (see http://www.kimeraboats.it for example)