[Webkit-unassigned] [Bug 155029] Blur filter escapes an enclosing overflow:hidden

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=155029

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

           What    |Removed                     |Added
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                 CC|                            |krit at webkit.org

--- Comment #1 from Simon Fraser (smfr) <simon.fraser at apple.com> ---
The clipping that RenderLayer::applyFilters() does is all wrong. The current code happens to never clip, because inside clipToRect(), clipRect.rect() == paintingInfo.paintDirtyRect. However, fixing that breaks filters that draw outside their bounds (blur, drop-shadow) because the backgroundRect used to clip is the pre-filtered background rect, taken from the paintDirtyRect.

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