639911 - porsche.com - Colors overlap labels during car configuration

Status: RESOLVED WORKSFORME

(Web Compatibility :: Site Reports, defect)

Description

[Marcia Knous [:marcia]]

Attachment: Screenshot of issue

Seen while running Mozilla/5.0 (Windows NT 6.1; WOW64; rv:2.0) Gecko/20100101 Firefox/4.0

STR:
1. Load http://cc.porsche.com/pva_new/ccCall.do?userID=US&lang=us&PARAM=parameter_internet_us&vLevel=2
2. Notice how the colors overlap the labels

Happens on Mac as well using the same build ID. On Mac I checked Safari and Chrome and in both browsers it displayed correctly.

Comment 1

[Boris Zbarsky [:bzbarsky]]

Did this work in 3.6?  The site serves somewhat different styles to us and Chrome, as far as I can tell...

Comment 2

[(mostly gone) XtC4UaLL [:xtc4uall]]

Hmm, this is WFM on Mozilla/5.0 (Windows NT 5.1; rv:2.0b13pre) Gecko/20110303 Firefox/4.0b13pre ID:20110303122446 and Mozilla/5.0 (Windows; U; Windows NT 5.1; de; rv:1.9.2.16pre) Gecko/20110308 Namoroka/3.6.16pre ID:20110308033207.

Comment 3

[Boris Zbarsky [:bzbarsky]]

Might depend on your default fonts, the fonts installed on your machine, the minimum font size, on Windows on whether you're getting dwrite or not, etc...

Comment 4

[Marcia Knous [:marcia]]

Using Mozilla/5.0 (Windows; U; Windows NT 6.1; en-US; rv:1.9.2.15) Gecko/20110303 Firefox/3.6.15 on the same machine it does work for me.

Comment 5

[(mostly gone) XtC4UaLL [:xtc4uall]]

Using on Mozilla/5.0 (Windows NT 6.1; WOW64; rv:2.0b13pre) Gecko/20110303 Firefox/4.0b13pre ID:20110303122446 I can repro the Issue.

With gfx.direct2d.disabled;true & gfx.font_rendering.directwrite.enabled;true => Issue

With gfx.direct2d.disabled;true & gfx.font_rendering.directwrite.enabled;false => no Issue

=> DirectWrite Issue or expected due to different Font Rendering?
What could cause this happen on MacOS too?

Comment 6

[Boris Zbarsky [:bzbarsky]]

The site is assuming that a particular pixel width will fit text with a particular font-family and font-size style.

In other words it's making assumptions about the fonts horizontal metrics.

This is a bogus assumption if the font is slightly different (e.g. Windows vs Mac) or the font rasterization engine does different glyph positioning (e.g. dwrite vs gdi).

This is really looking like an evangelism bug to me...

Comment 7

[anthonydam]

If you disable the hardware acceleration, it works fine.

Go to option > advanced > uncheck "use hardware acceleration when available".

Comment 8

[Kevin Brosnan [Ex-Mozilla]]

> TE

Comment 9

[Ed Morley [:emorley]]

Adjusting title to TE preferred format.

Comment 10

[Anders Pedersen]

WFM.

Windows Vista 32-bit.
Build identifier: Mozilla/5.0 (Windows NT 6.0; rv:2.2a1pre) Gecko/20110331 Firefox/4.2a1pre
Shockwave Flash 10.3.180.65 Beta 2

Comment 11

[u279076]

Marcia, can you still reproduce this in Minefield (as per comment 10)?

Comment 12

[anthonydam]

(In reply to comment #10)
> WFM.
> 
> Windows Vista 32-bit.
> Build identifier: Mozilla/5.0 (Windows NT 6.0; rv:2.2a1pre) Gecko/20110331
> Firefox/4.2a1pre
> Shockwave Flash 10.3.180.65 Beta 2

With HA on?

Comment 13

[Anders Pedersen]

(In reply to comment #12)
> (In reply to comment #10)
> > WFM.
> > 
> > Windows Vista 32-bit.
> > Build identifier: Mozilla/5.0 (Windows NT 6.0; rv:2.2a1pre) Gecko/20110331
> > Firefox/4.2a1pre
> > Shockwave Flash 10.3.180.65 Beta 2
> 
> With HA on?

Yes.

Comment 14

[Marcia Knous [:marcia]]

Using the latest trunk nightly on one Windows 7 machine, I am unable to reproduce. I will try the other machines I have as well.

(In reply to comment #11)
> Marcia, can you still reproduce this in Minefield (as per comment 10)?

Comment 15

[Marcia Knous [:marcia]]

Mozilla/5.0 (Windows NT 6.1; WOW64; rv:2.2a1pre) Gecko/20110401 Firefox/4.2a1pre on another machine, I still see the issue. When I pref off Hardware acceleration the issue does not occur.

Comment 16

[Marcia Knous [:marcia]]

This was on a different machine from the one tested in Comment 14.

(In reply to comment #15)
> Mozilla/5.0 (Windows NT 6.1; WOW64; rv:2.2a1pre) Gecko/20110401
> Firefox/4.2a1pre on another machine, I still see the issue. When I pref off
> Hardware acceleration the issue does not occur.

Comment 17

[Marcia Knous [:marcia]]

On this Windows 7 laptop, hardware acceleration is pref'd on and the issue does not manifest itself. So it might be machine dependent.

(In reply to comment #14)
> Using the latest trunk nightly on one Windows 7 machine, I am unable to
> reproduce. I will try the other machines I have as well.
> 
> (In reply to comment #11)
> > Marcia, can you still reproduce this in Minefield (as per comment 10)?

Comment 18

[Karl Dubost💡 :karlcow]

This site doesn't seem to be maintained anymore in any browsers. I have a consistent result with a broken header. As for the bug, I didn't notice anything wrong.