[Webkit-unassigned] [Bug 139237] New: SVG filter effect does not respect its region when its ancestor filter is referenced in the svg

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=139237

            Bug ID: 139237
           Summary: SVG filter effect does not respect its region when its
                    ancestor filter is referenced in the svg
    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

Created attachment 242533
  --> https://bugs.webkit.org/attachment.cgi?id=242533&action=review
Safari-Rendering

Open the following svg in WebKit:

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

  <filter id="f2" filterUnits="objectBoundingBox" primitiveUnits="objectBoundingBox" 
         x="0" y="0" width="1" height="1">
    <feFlood flood-color="#ff0000" result="flood"/>
    <feComposite x="10%" y="10%" width="80%" height="80%" style="color-interpolation-filters:sRGB"
         in="flood" operator="in" in2="SourceGraphic"/>
  </filter>
  <g filter="url(#f2)">
    <rect x="0" y="0" width="100" height="100" fill="#00ff00"/>
  </g>

</svg>

Result: The region applied on the filter effect <feComposite> is ignored. The red rectangle is displayed at position = (0,0) with size = (100,100).
Expected: The red rectangle should be displayed at position = (10,10) with size (80,80). See the attached screen-shots for how Safari and FireFox are displaying the above svg.

NOTE: Chrome and FireFox respect the filter effect region and they behave exactly the same.

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