[Webkit-unassigned] [Bug 193665] [iOS] Tiles not created in large scrollable iframes

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=193665

Antti Koivisto <koivisto at iki.fi> changed:

           What    |Removed                     |Added
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 Attachment #359730|0                           |1
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--- Comment #10 from Antti Koivisto <koivisto at iki.fi> ---
Created attachment 360596

  --> https://bugs.webkit.org/attachment.cgi?id=360596&action=review

wip

This adds a concept of "scroll container layer" to the scrolling tree and uses it for frames. This layer then maps to UIScrollView when async scrolling is enabled. In this setup "scroll layer" is always the layer that moves during scrolling. This matches the existing pure layer based scrolling code and so requires way fewer hacks.

Scroll container layer replaces the existing clip layer as it serves that function as well.

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