[Webkit-unassigned] [Bug 55257] Support creating compositing layers for scrollable and overflowing objects

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=55257





--- Comment #30 from Simon Fraser (smfr) <simon.fraser at apple.com>  2011-03-07 17:05:29 PST ---
(From update of attachment 85000)
View in context: https://bugs.webkit.org/attachment.cgi?id=85000&action=review

> Source/WebCore/rendering/RenderLayerCompositor.cpp:1262
> +bool RenderLayerCompositor::requiresCompositingForScrollableOverflow(RenderObject* renderer) const
> +{
> +    if (!(m_compositingTriggers & ChromeClient::ScrollableOverflowTrigger))
> +        return false;
> +
> +    if (!renderer->isRenderBlock() || renderer->isTextControl())
> +        return false;
> +
> +    RenderBox* box = toRenderBox(renderer);

I think you should treat iframes and overflow:scroll totally separately, rather than mushing "scrollable areas" together.

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