614555 - Blurred fonts on some websites

Status: RESOLVED FIXED

(Core :: Graphics, defect)

Description

[horvathd]

User-Agent:       Mozilla/5.0 (Windows NT 5.1; rv:2.0b8pre) Gecko/20101124 Firefox/4.0b8pre
Build Identifier: Mozilla/5.0 (Windows NT 5.1; rv:2.0b8pre) Gecko/20101124 Firefox/4.0b8pre

On some websites, some of the font are blurred, making it hard to read.

On http://www.hello-online.org/ almost the whole page is blurred.
On http://www.kongregate.com/ the text in the login field is blurred.

With Firefox 3.6.12 both of the sites looks normal.

Reproducible: Always




My video card's details:

Graphics
Adapter Description: Intel(R) 82852/82855 GM/GME Graphics Controller
Vendor ID: 8086
Device ID: 3582
Adapter RAM: Unknown
Adapter Drivers: ialmrnt5
Driver Version: 6.14.10.4497
Driver Date: 2-7-2006
Direct2D Enabled: false
DirectWrite Enabled: false
GPU Accelerated Windows: 0/1

I tried to disable the hardware acceleration but no success.

Comment 1

[horvathd]

Attachment: With Firefox 3.6.12

Comment 2

[horvathd]

Attachment: With Firefox 4 nightly 20101124

Comment 3

[Csaba Kozák [:WonderCsabo]]

It's a dupe of Bug 594325

Comment 5

[horvathd]

I my opinion this bug is not related to Bug 594325 because my PC doesn't have hardware accelerated video card, and it happening only on some webpages.

Comment 6

[Michael Lefevre]

Ok, that might have been a bit hasty...

Comment 7

[Csaba Kozák [:WonderCsabo]]

New fresh profile?

Comment 8

[horvathd]

No difference with a new profile.

Comment 9

[Csaba Kozák [:WonderCsabo]]

Is this the latest driver for that card?

Comment 10

[horvathd]

Yes, it is.

Comment 11

[Jonathan Kew [:jfkthame]]

Comparing the light-on-dark text in the login area of the FF3.6 and 4.0beta screenshots, it looks like 3.6 is using ClearType, while 4.0beta is using "standard" (grayscale) antialiasing, which is giving it a much weaker and less consistent look.

cc'ing roc and bas, who may have ideas about why we'd be getting different antialiasing modes here -  is this a known issue? Something related to layers, maybe?

Comment 12

[(mostly gone) XtC4UaLL [:xtc4uall]]

horvathd, what happens if you explicitly set layers.accelerate-none to "true" via about:config?

Comment 13

[horvathd]

No change.

Comment 14

[Robert O'Callahan (:roc) (email my personal email if necessary)]

Bug 363861 will change things here. Let's wait for that to land and reevaluate. Any fix to this bug would certainly depend on the changes in bug 363861.

Comment 15

[horvathd]

No change after the fix of https://bugzilla.mozilla.org/show_bug.cgi?id=363861.

Comment 16

[Robert O'Callahan (:roc) (email my personal email if necessary)]

Jonathan, do I understand correctly that you could reproduce this? Can you still reproduce it?

Comment 17

[Jonathan Kew [:jfkthame]]

(In reply to comment #16)
> Jonathan, do I understand correctly that you could reproduce this?

I didn't reproduce this locally, I only commented on the screenshots that were provided.

Comment 18

[horvathd]

I was playing with Firebug and I found that if I disable on kongregate.com the border-top-left-radius and border-top-right-radius properties in the #welcome div then the anti-aliasing looks good. If one of the properties is enabled then Firefox only uses grey-scale anti-aliasing for some reason.

Comment 19

[horvathd]

I checked www.hello-online.org too and the problem was the same I had to disable the border-bottom-left-radius and border-bottom-right-radius properties in the #content div.

Comment 20

[Timothy Nikkel (:tnikkel)]

Border radius causing grayscale aa should be fixed by bug 613040.

Comment 21

[horvathd]

Fixed with the latest nightly build.