[Webkit-unassigned] [Bug 74025] New: FEDropShadow calls ImageBuffer::putPremultipliedImageData with non-premultiplied pixels

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=74025

           Summary: FEDropShadow calls
                    ImageBuffer::putPremultipliedImageData with
                    non-premultiplied pixels
           Product: WebKit
           Version: 528+ (Nightly build)
          Platform: All
        OS/Version: All
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: SVG
        AssignedTo: webkit-unassigned at lists.webkit.org
        ReportedBy: bsalomon at google.com
                CC: zimmermann at kde.org, krit at webkit.org,
                    simon.fraser at apple.com, reed at google.com,
                    senorblanco at chromium.org


This can be demonstrated by running the svg/dynamic-updates/SVGFEDropShadow* layout tests with an assert that r, g, and b are <= a in an implementation of ImageBuffer::putPremultipliedImageData. 

The call to putPremultipliedImageData is here: http://trac.webkit.org/browser/trunk/Source/WebCore/platform/graphics/filters/FEDropShadow.cpp#L108

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