675497 - Rendering Artifact in Direct2D

Status: RESOLVED DUPLICATE of bug 701528

(Core :: Graphics, defect)

Description

[henryfhchan]

User Agent: Mozilla/5.0 (Windows NT 6.1) AppleWebKit/534.30 (KHTML, like Gecko) Chrome/12.0.742.122 Safari/534.30

Steps to reproduce:

At 123got-it.com, clicking on the user name drop down causes a white border to appear over the <header>.


Actual results:

The <header> has a margin-bottom of 5px.  An absolutely-positioned div is shown when the user name is clicked.  The absolutely-positioned div is a child of the <header>.  When the div is shown, a white border overlaps the <header> but the gradient does not shift.  The border is 2px wide but the inner pixel looks half translucent (1.5px?).  Sometimes the whole gradient disappears and the <header> looks as if there's a mask on top (especially if the page has not finished loading).

This doesn't occur when gfx.direct2d.disabled is enabled.
The border disappears if i remove the margin in firebug.

Swapping the gradient for a background color is the same (via firebug)

A username and password to login to see can be provided on request.
Thank you :)

Comment 1

[henryfhchan]

Useragent: "Mozilla/5.0 (Windows NT 6.1; rv:8.0a1) Gecko/20110730 Firefox/8.0a1"

Comment 2

[henryfhchan]

happens in firefox 5 as well.

Comment 3

[henryfhchan]

Also in trunk, clicking the [Login] button a ghost image at the top is also seen.
Does not appear with direct2d off.

Comment 4

[henryfhchan]

Attachment: showing the bug

Comment 5

[henryfhchan]

i have not gotten round to recovering the old code, however the issue shows up on Facebook as well.

Comment 6

[henryfhchan]

Attachment: white "border" at top, left and right

scrolling or moving parts of the page seem to fix the problem, but comes back intermittently.

Comment 7

[Bas Schouten (:bas.schouten)]

Probably bug 701528.

Comment 9

[henryfhchan]

(ghost image went with one of the other gfx bugs.)