[Webkit-unassigned] [Bug 113666] New: SVG outline property is broken and inefficient

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=113666

           Summary: SVG outline property is broken and inefficient
           Product: WebKit
           Version: 528+ (Nightly build)
          Platform: Unspecified
        OS/Version: Unspecified
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: SVG
        AssignedTo: webkit-unassigned at lists.webkit.org
        ReportedBy: pdr at google.com
                CC: zimmermann at kde.org, krit at webkit.org, pdr at google.com,
                    schenney at chromium.org, fmalita at chromium.org


Created an attachment (id=195909)
 --> (https://bugs.webkit.org/attachment.cgi?id=195909&action=review)
Outline testcase

WebKit is the only rendering engine that supports outlines on SVG elements:
<rect x="0" y="0" width="100" height="300" style="outline: 1px solid #000"/>

Furthermore, our implementation is broken as we paint outlines in a separate paintphase so they always render on top of other siblings (see attached: outlineTest.html).
Note: Presto does this for HTML divs as well, whereas WebKit, Gecko, and Trident all render HTML div outlines below a later sibling's background.

Do we even want to support outlines? In supporting it we are making two passes over the render tree which includes a matrix multiply at each node!

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