[Webkit-unassigned] [Bug 139282] New: feConvolveMatrix does not work correctly when it is defined in the <defs> section and referenced by an svg element

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=139282

            Bug ID: 139282
           Summary: feConvolveMatrix does not work correctly when it is
                    defined in the <defs> section and referenced by an svg
                    element
    Classification: Unclassified
           Product: WebKit
           Version: 528+ (Nightly build)
          Hardware: Unspecified
                OS: Unspecified
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: SVG
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: sabouhallawa at apple.com
                CC: zimmermann at kde.org

Open the following svg in WebKit:

<svg xmlns="http://www.w3.org/2000/svg"
     xmlns:xlink="http://www.w3.org/1999/xlink">

  <defs>
    <image id="MyImage" width="10" height="10" xlink:href="data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAoAAAAKCAYAAACNMs+9AAAAAXNSR0IArs4c6QAAADdJREFUGNNjZGD4/5+BCMDCwMDAwNDQiF9VQz0DEwORgPoKGRkY/v9fe+M5XkXBGpID7kZiFAIAEbULDl5w/68AAAAASUVORK5CYII="/>
    <filter id="noop" x="0%" y="0%" width="100%" height="100%">
      <feConvolveMatrix order="1" kernelMatrix="1"/>
    </filter>
  </defs>

  <g transform="translate(10, 10)">
    <use x="0" y="0" xlink:href="#MyImage" />
    <use x="20" y="0" xlink:href="#MyImage">
      <filter id="noop" x="0%" y="0%" width="100%" height="100%">
        <feConvolveMatrix order="1" kernelMatrix="1"/>
      </filter>
    </use>
    <g filter="url(#noop)">
      <use x="40" y="0" xlink:href="#MyImage" />
    </g>
  </g>
</svg>

Result: The last image looks different from the first two images.
Expected: The three images should look exactly the same. The first image is the row image. The second image has a convolution matrix filter with no-opertaion matrix so the image should not be affected by this filter. The third image has the same filter but it references it from the <defs> section. So It should look the same as the first two but it does not.

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