[Webkit-unassigned] [Bug 202826] New: Outsets for referenced SVG filters are always zero

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=202826

            Bug ID: 202826
           Summary: Outsets for referenced SVG filters are always zero
           Product: WebKit
           Version: WebKit Nightly Build
          Hardware: Unspecified
                OS: Unspecified
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: Layout and Rendering
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: sabouhallawa at apple.com
                CC: bfulgham at webkit.org, simon.fraser at apple.com,
                    zalan at apple.com

Created attachment 380688

  --> https://bugs.webkit.org/attachment.cgi?id=380688&action=review

test case

Open the attached test case.

Result: A blurred green rectangle.
Expected: A solid green rectangle.

In the test case, there is an 800x800 <div> element filled with "background-color: green;". An SVG filter applied to this <div> with the effect: "<fegaussianblur stdDeviation="100">". This filtered element is transformed by: "translate(-300px, -300px)" and it is placed inside another container 100x100 <div> whose "overflow: hidden;". So the container element shows only the rectangle { location = { 300, 300 }, size = { 100, 100 } } of the filtered element. This means none of the filter blurred pixels should be shown.

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