[Webkit-unassigned] [Bug 196608] Update touch-action region on property changes

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=196608

Simon Fraser (smfr) <simon.fraser at apple.com> changed:

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--- Comment #4 from Simon Fraser (smfr) <simon.fraser at apple.com> ---
Comment on attachment 366934
  --> https://bugs.webkit.org/attachment.cgi?id=366934
patch

View in context: https://bugs.webkit.org/attachment.cgi?id=366934&action=review

> Source/WebCore/rendering/RenderLayerBacking.cpp:2489
> +    m_owningLayer.invalidateEventRegion();

It's a shame to trigger expensive event region building for non-layout changes like color changes. Can we use a StyleDiff somewhere instead? Imagine an animation of background-color triggering region rebuilds every frame :(

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