1774521 - Codepen demo "shimmers" while animating

Status: RESOLVED FIXED

(Core :: Graphics: WebRender, defect)

Description

[Mayank Bansal]

Go to https://codepen.io/danwilson/pen/MWQXJmN

ER: Smooth animations
AR: The horizontal bars sort of "shimmer" while animating

Regression:
pushes?changeset=b7f88e5c537bb7d64ba9d4cb58b052650d510638&full=1 HTTP/1.1" 200 None
2022-06-16T08:48:59.294000: DEBUG : Found commit message:
Bug 1749380 - Improve how WR handles bounding rects for off-screen surfaces r=gfx-reviewers,kvark
Differential Revision: https://phabricator.services.mozilla.com/D137569

2022-06-16T08:48:59.294000: DEBUG : Did not find a branch, checking all integration branches
2022-06-16T08:48:59.310000: INFO : The bisection is done.
2022-06-16T08:48:59.310000: INFO : Stopped

Comment 1

[Mayank Bansal]

Attachment: about:support

Comment 2

[Mayank Bansal]

Attachment: Standalone testcase.html

Comment 3

[BugBot [:suhaib / :marco/ :calixte]]

Set release status flags based on info from the regressing bug 1749380

Comment 4

[BugBot [:suhaib / :marco/ :calixte]]

:gw, since you are the author of the regressor, bug 1749380, could you take a look?
For more information, please visit auto_nag documentation.

Comment 5

[BugBot [:suhaib / :marco/ :calixte]]

Set release status flags based on info from the regressing bug 1749380

Comment 6

[Glenn Watson [:gw]]

I suspect this will be fixed by the patch in https://bugzilla.mozilla.org/show_bug.cgi?id=1768678 when it lands.

Comment 7

[Mayank Bansal]

This was not fixed by bug 1768678. I can still repro on nightly from https://hg.mozilla.org/mozilla-central/rev/1da938652f57c170dfd689128fc7d09006417410

Comment 8

[Glenn Watson [:gw]]

Does this look better to you after https://bugzilla.mozilla.org/show_bug.cgi?id=1782405 (it's still on autoland, though there is a try run with it at https://treeherder.mozilla.org/jobs?repo=try&revision=681a4f0b5b2c79f3058a54e5a13e5c59c4ad4a46)?

Comment 9

[Mayank Bansal]

(In reply to Glenn Watson [:gw] from comment #8)

Does this look better to you after https://bugzilla.mozilla.org/show_bug.cgi?id=1782405 (it's still on autoland, though there is a try run with it at https://treeherder.mozilla.org/jobs?repo=try&revision=681a4f0b5b2c79f3058a54e5a13e5c59c4ad4a46)?

This bug is fixed with the above build. Thanks!