1557437 - getOMTAStyle should return a valid string in delay phase

Status: NEW

(Core :: CSS Transitions and Animations, enhancement, P4)

Description

[Boris Chiou [:boris]]

It seems getOMTAStyle() returns an empty string in delay phase (even though we send the animations into the compositor) [1]. It'd be better to return a valid string to know its status.

Note: In this case, the SampleResult is None.

[1] https://searchfox.org/mozilla-central/rev/153172de0c5bfca31ef861bd8fc0995f44cada6a/dom/base/nsDOMWindowUtils.cpp#3424

Comment 1

[Hiroyuki Ikezoe (:hiro)]

I just happened to remember there is an API to get transform values on the compositor, its name is getOMTCTransform, it might be sufficient for the test case in question.

Comment 2

[Boris Chiou [:boris]]

Oh yes. I got a matrix like this matrix(1.25, 0, 0, 1.25, 87.5, -12.5). It seems there is a -1.25 offset on the translate part (note: what I expected is matrix(1.25, 0, 0, 1.25, 100, 0)). I haven't checked the code yet, but this works in delay phase (though it's a little bit different from the expected matrix).