1944975 - [wpt-sync] Sync PR 50395 - Calculate TimeToEffectChange for active reverse animations

Status: RESOLVED FIXED

(Core :: DOM: Animation, task, P4)

Description

[Web Platform Test Sync Bot [:wpt-sync] (Matrix: #interop:mozilla.org)]

Sync web-platform-tests PR 50395 into mozilla-central (this bug is closed when the sync is complete).

PR: https://github.com/web-platform-tests/wpt/pull/50395
Details from upstream follow.

Claire Chambers <[e-mail]> wrote:

Calculate TimeToEffectChange for active reverse animations

This change fixes a long-standing issue where TimeToEffectChange would
always resolve zero for playback rates \<0. Instead, they now resolve
similarly to animations with positive delays.

This CL adds tests to ensure composited paint worklet animations work
correctly with the new behavior, as well as editing a unit test for
KeyframeEffect to match the new behavior.

Additionally, reverse-running-animation.html, which tested step timing
functions with reverse playback rates, never operated correctly due
to a typo. This is now fixed.

Change-Id: I1002c319c34b4a7f713c71a76dcd4e6292b33771
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/6179078
Reviewed-by: Kevin Ellis \<[e-mail]>
Commit-Queue: Claire Chambers \<[e-mail]>
Cr-Commit-Position: refs/heads/main@{#1413710}

Comment 1

[Web Platform Test Sync Bot [:wpt-sync] (Matrix: #interop:mozilla.org)]

Pushed to try (stability) https://treeherder.mozilla.org/#/jobs?repo=try&revision=f36e7aa16acc2861fa90736801957b2b47e5df0d

Comment 2

[Web Platform Test Sync Bot [:wpt-sync] (Matrix: #interop:mozilla.org)]

CI Results

Ran 0 Firefox configurations based on mozilla-central, and Firefox, Chrome, and Safari on GitHub CI

Total 1 tests

Status Summary

Firefox

PASS: 1

Chrome

FAIL: 1

Safari

PASS: 1

Links

GitHub PR Head
GitHub PR Base

Comment 3

[Pulsebot]

Pushed by [e-mail]:
https://hg.mozilla.org/integration/autoland/rev/3bf680261565
[wpt PR 50395] - Calculate TimeToEffectChange for active reverse animations, a=testonly

Comment 4

[Cristian Tuns]

https://hg.mozilla.org/mozilla-central/rev/3bf680261565