[Webkit-unassigned] [Bug 136418] New: SVG filter effect feGaussianBlur unexpectedly lightens image using linearRGB

bugzilla-daemon at webkit.org bugzilla-daemon at webkit.org
Sun Aug 31 10:45:05 PDT 2014


           Summary: SVG filter effect feGaussianBlur unexpectedly lightens
                    image using linearRGB
           Product: WebKit
           Version: 528+ (Nightly build)
          Platform: Unspecified
        OS/Version: Unspecified
            Status: NEW
          Severity: Normal
          Priority: P3
         Component: SVG
        AssignedTo: webkit-unassigned at lists.webkit.org
        ReportedBy: david at bonnet.cc
                CC: zimmermann at kde.org

Created an attachment (id=237428)
 --> (https://bugs.webkit.org/attachment.cgi?id=237428&action=review)
SVG example showing the blur effect with sRGB and linearRGB

When using a gaussian blur filter effect, the resulting image is lightened when using linearRGB for color interpolation. The attached file shows the color alteration. When using the sRGB for color interpolation, results are consistent across browsers, yet the blur effect is less desirable.

This bug has been witnessed on several occasions:
- http://stackoverflow.com/questions/24295043/svg-gaussian-blur-in-safari-unexpectedly-lightens-image
- http://stackoverflow.com/questions/22615663/safari-renders-wrong-colors-when-using-blur-filter

>From the comments on the pages mentioned above, it seems to have been introduced since Safari 7.

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