[Webkit-unassigned] [Bug 141731] New: The origin of SVG clip-path is not calculated correctly when it is applied outside the SVG

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=141731

            Bug ID: 141731
           Summary: The origin of SVG clip-path is not calculated
                    correctly when it is applied outside 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 246774
  --> https://bugs.webkit.org/attachment.cgi?id=246774&action=review
Test case

Open the attached test case. It has four inline <div> tags. Inside each tag, there is a nested <div> which is clipped using an SVG <clipPath>. The same <clipPath> is applied to an item in the SVG itself.

Results: When applying the clipPath outside the SVG, the clipping is only applied on the first <div> and its origin is not correct. It shifted to the top and the left of the <div>.  Also it is applied for the first time only. From the second time, the clip-path clips the whole element, i.e. nothing is displayed from it.

When the transform: translateZ(0); is added to the style of the nested <div>, no clipping is applied, i.e.the whole element is rendered.

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