1569795 - [motion-1] Motion path is overridden when we have transform animations

Status: RESOLVED FIXED

(Core :: CSS Transitions and Animations, defect, P3)

Description

[Boris Chiou [:boris]]

This is a known issue when I worked on compositor animations for individual transforms. We don't support compositor animations for motion path, so for now, if we have motion-path, we should block compositor animations of other transform-like properties.

Comment 1

[Boris Chiou [:boris]]

Bug 1429305 will fix this, but that bug may not be fixed in this quarter, so I'd like to make transform animations fall-back to the main thread if the element has an offset-path property value (i.e. non-none value).

Comment 2

[Boris Chiou [:boris]]

Attachment: Bug 1569795 - Block compositor animations of transform-like properties if offset-path is not none.

The animations of motion path are not running on the compositor, and the
properties in [motion-1] is not part of transform-like properties (i.e.
nsCSSProperties::TransformLikeProperties()) for now, so transform animations
should fall back to main thread if offset-path is not none.

Comment 3

[Pulsebot]

Pushed by [e-mail]:
https://hg.mozilla.org/integration/autoland/rev/da1b2c17a9e5
Block compositor animations of transform-like properties if offset-path is not none. r=hiro

Comment 4

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

Created web-platform-tests PR https://github.com/web-platform-tests/wpt/pull/18258 for changes under testing/web-platform/tests

Comment 5

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

Upstream web-platform-tests status checks passed, PR will merge once commit reaches central.

Comment 6

[Oana Pop-Rus]

https://hg.mozilla.org/mozilla-central/rev/da1b2c17a9e5

Comment 7

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

Upstream PR merged