[Webkit-unassigned] [Bug 94359] New: [CI][CSS Masking] apply luminance mask to context

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=94359

           Summary: [CI][CSS Masking] apply luminance mask to context
           Product: WebKit
           Version: 528+ (Nightly build)
          Platform: Unspecified
        OS/Version: Unspecified
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: CSS
        AssignedTo: webkit-unassigned at lists.webkit.org
        ReportedBy: krit at webkit.org
                CC: eoconnor at apple.com


CSS masking just supported alpha masks at the moment. For compatibility reasons to SVG and to support the general harmonization process with bug 90738, it looks reasonable to support luminance masks as well. This is currently described by the proposal for CSS Masking [1].

The old SVG masking code used to work with CI to transform a luminance mask to an alpha mask [2].

[1] http://dvcs.w3.org/hg/FXTF/raw-file/tip/masking/index.html#the-mask-type
[2] http://trac.webkit.org/browser/trunk/WebCore/svg/graphics/cg/SVGResourceMaskerCg.mm?rev=35895

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