[Webkit-unassigned] [Bug 201019] Migrate from m_styleRecalcTimer to scheduled rendering updates

bugzilla-daemon at webkit.org bugzilla-daemon at webkit.org
Tue Dec 22 12:20:54 PST 2020


https://bugs.webkit.org/show_bug.cgi?id=201019

--- Comment #3 from Ryosuke Niwa <rniwa at webkit.org> ---
(In reply to Simon Fraser (smfr) from comment #2)
> I think we’d have to move layer tree freezing into webcore, and have
> Page::updateRendering() do the first layout, but bail early when the tree is
> frozen

I think this is backwards. Instead of moving layer tree freezing into WebCore and letting TiledCoreAnimationDrawingArea::triggerRenderingUpdate invoke updateRendering just to make a progress in the "visually non-empty" state, TiledCoreAnimationDrawingArea::updateRendering should just know this is happening and trigger the initial layout anyway. So add something like Page::updateRenderingForFirstTimeIfNeeded and always call that when the layer tree is frozen.

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