[Webkit-unassigned] [Bug 164949] -webkit-overflow-scrolling: touch completely breaks 3D perspective functionality

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=164949

--- Comment #6 from Frédéric Wang (:fredw) <fred.wang at free.fr> ---
(In reply to Ali Juma from comment #5)
> I'd suggest looking at the corresponding RenderLayerBacking to see which
> GraphicsLayers are created, and which of these GraphicsLayers have
> preserves3D() true. Probably in the overflow-scrolling:touch case, there's a
> GraphicsLayer which ends up flattening the transform (because of
> preserves3D() being false), so the Z component ends up having no visual
> effect.

Thanks for the hint! Indeed I started to debug RenderLayerBacking this morning and the perspective / z-translate transform seemed to be correctly taken into account. I'll check preserves3D later...

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