[Webkit-unassigned] [Bug 172338] SVG mask is not applied as a group effect

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=172338

--- Comment #2 from Simon Fraser (smfr) <simon.fraser at apple.com> ---
RenderSVGResourceMasker::applyResource) is painting the mask into a buffer, and then calling SVGRenderingContext::clipToImageBuffer() with that.

Interestingly, GraphicsContext::clipToImageBuffer() has a comment:

    // FIXME: This image needs to be grayscale to be used as an alpha mask here.

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