[Webkit-unassigned] [Bug 221471] CSS transform @keyframes animation breaks full screen video

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=221471

--- Comment #6 from Andrew Hawkes <mail at andrewhawkes.co.uk> ---
(In reply to Antoine Quint from comment #5)
> Changing the animation to use "margin-left" (not accelerated) or "opacity"
> (accelerated) does not reproduce the issue. Removing the animation and
> setting "will-change: transform" or setting "transform: translateZ(0)" does
> not reproduce the issue. So it does seem specific to animations of transform.

When I was debugging the original issue I was having I did find removing "will-change: opacity" fixed one instance of this but I couldn't replicate it. I'm not super clued up on how it works but I assume it's happening under GPU acceleration.

I thought I'd note that anyway, just in case. If I get some time, I'll try to replicate it.

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