[Webkit-unassigned] [Bug 185863] New: Empty filter changes appearance of SVG group element containing mask

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=185863

            Bug ID: 185863
           Summary: Empty filter changes appearance of SVG group element
                    containing mask
           Product: WebKit
           Version: Safari 11
          Hardware: Unspecified
                OS: Unspecified
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: SVG
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: jan.boesenberg at incors.com
                CC: zimmermann at kde.org

Created attachment 340973

  --> https://bugs.webkit.org/attachment.cgi?id=340973&action=review

Test case showing the group without and with empty filter applied

In the attached test case (online version at http://jsbin.com/mewosoteya ) an empty filter is applied to a group element that contains two rect elements, of which one is masked.

It would be expected that the filter has no effect at all, but the empty filter changes the appearance of the displayed gradient. It does not make any difference if the filter's "color-interpolation-filters" attribute is set to "sRGB" or "linearRGB".

On Safari only the left square is displayed correctly. The other two squares show a wrong gradient. On all other browsers all squares look the same.

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