1325235 - Graphical artifacts remain after end of animation

Status: NEW

(Core :: Graphics: Layers, defect, P3)

Description

[Brian Birtles (:birtles, Feb 26~ parental leave)]

Splitting this off from bug 1316764 since that bug covers two independent regressions. This bug tracks the Windows-specific graphics regression from bug 1107297.

See the test case in attachment 8809735 [details].

After running the test several times graphical artifacts remain (see attachment 8809736 [details]).

Bas, can you have a look at this? This appears to be independent of any changes on the animation side.

Comment 1

[Brian Birtles (:birtles, Feb 26~ parental leave)]

This might dupe part of bug 1316236 but I think that bug is now tracking the tech evangelism side of that bug.

Comment 2

[Bas Schouten (:bas.schouten)]

I can see this bug happen 'some of the time', as far as I can tell this is not actually a graphics bug though, but a case of layout not passing in that area of the page as 'invalidated', which causes us not to recomposite it to the screen. Yes, recompositing the whole screen does 'fix' this bug, but that's just because we then ignore the invalid rect.

Comment 3

[Milan Sreckovic [:milan] (needinfo for best results)]

Xidorn, is this still visible for you with the fix you put up in bug 1316236?

Comment 4

[Mike Taylor [:miketaylr]]

FWIW, this doesn't repro for me in the latest Nightly.

Comment 5

[Xidorn Quan [:xidorn] UTC+11]

I tested the reduced testcase there, and there is no issue anymore.

But this issue is unrelated to that one. If you change the perspective(0) to something like perspective(1px), this issue would probably still reproduce.

Comment 6

[Liz Henry (:lizzard) (relman/hg->git project)]

Still an issue we want to investigate, or is this just part of the backlog now? 
Is this a layout bug or a graphics one?

Comment 7

[Xidorn Quan [:xidorn] UTC+11]

It is just part of the backlog. We've fixed the webcompat issue by using the same approach for perspective function as other browsers, so this issue itself isn't that high priority.