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Call CheckCanStartAnimationOnCompositor at paint #27747

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merged 1 commit into from Feb 26, 2021

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@chromium-wpt-export-bot chromium-wpt-export-bot commented Feb 23, 2021

Note: this is for background-color animation only, not for other
properties.

When composite background-color animation, the paint stage collect
some parameters such as animated colors for the animation. If this
step is successful, then we will paint the element off the main
thread. After that, we can have CheckCanStartAnimationOnCompositor
returning false and refuse to run the background-color animation
on the compositor thread. In this case, the paint of the element
off the main thread won't work.

So in this CL, we call CheckCanStartAnimationOnCompositor during
the paint step. This ensures the consistency of the paint and
compositor animation.

Bug: 1178987
Change-Id: I737b1e290730637977bc6fcff65cab9b4651aa8a
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2713344
Commit-Queue: Xida Chen <xidachen@chromium.org>
Reviewed-by: Kevin Ellis <kevers@chromium.org>
Cr-Commit-Position: refs/heads/master@{#858271}

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The review process for this patch is being conducted in the Chromium project.

@chromium-wpt-export-bot chromium-wpt-export-bot force-pushed the chromium-export-cl-2713344 branch 5 times, most recently from 68c005e to 9fe5526 Compare February 26, 2021 19:41
Note: this is for background-color animation only, not for other
properties.

When composite background-color animation, the paint stage collect
some parameters such as animated colors for the animation. If this
step is successful, then we will paint the element off the main
thread. After that, we can have CheckCanStartAnimationOnCompositor
returning false and refuse to run the background-color animation
on the compositor thread. In this case, the paint of the element
off the main thread won't work.

So in this CL, we call CheckCanStartAnimationOnCompositor during
the paint step. This ensures the consistency of the paint and
compositor animation.

Bug: 1178987
Change-Id: I737b1e290730637977bc6fcff65cab9b4651aa8a
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2713344
Commit-Queue: Xida Chen <xidachen@chromium.org>
Reviewed-by: Kevin Ellis <kevers@chromium.org>
Cr-Commit-Position: refs/heads/master@{#858271}
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3 participants