[Webkit-unassigned] [Bug 93290] New: getBBox() returns (0, 0) when width or height is zero.

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=93290

           Summary: getBBox() returns (0,0) when width or height is zero.
           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


Created an attachment (id=156745)
 --> (https://bugs.webkit.org/attachment.cgi?id=156745&action=review)
Testcase

Original bug: http://code.google.com/p/chromium/issues/detail?id=140472

For rects/ellipses with width or height of 0, we incorrectly return the bounding box as being empty.

Fixing this is a two step process:
1) Rects/Ellipses currently have an isEmpty() check in updateShapeFromElement() that should be changed to isZero()
2) When rects/ellipses fall back to renderSVGShape, their fill bounding box should not fall back. The reason is: the fill bounding box does not care about non-scaling-strokes or rounded corners, so we do not have to rely on Skia's path bounding box calculation (which, because it is a pixel library, will return (0,0)).

This is a good starter bug.

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