Open Bug 1325235 Opened 4 years ago Updated 4 years ago

Graphical artifacts remain after end of animation


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

Windows 10



Tracking Status
firefox50 --- wontfix
firefox51 --- wontfix
firefox52 --- wontfix
firefox53 --- wontfix
firefox54 --- fix-optional


(Reporter: birtles, Unassigned)




(Keywords: regression, Whiteboard: [gfx-noted])

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.
Flags: needinfo?(bas)
This might dupe part of bug 1316236 but I think that bug is now tracking the tech evangelism side of that bug.
See Also: → 1316764
Priority: -- → P3
Whiteboard: [gfx-noted]
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.
Flags: needinfo?(bas)
Xidorn, is this still visible for you with the fix you put up in bug 1316236?
Flags: needinfo?(xidorn+moz)
FWIW, this doesn't repro for me in the latest Nightly.
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.
Flags: needinfo?(xidorn+moz)
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?
Flags: needinfo?(xidorn+moz)
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.
Flags: needinfo?(xidorn+moz)
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