[Webkit-unassigned] [Bug 31960] New: SVG: DOM animation of <svg> elements fails to redraw properly

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=31960

           Summary: SVG: DOM animation of <svg> elements fails to redraw
                    properly
           Product: WebKit
           Version: 528+ (Nightly build)
          Platform: Macintosh
        OS/Version: Mac OS X 10.5
            Status: UNCONFIRMED
          Severity: Normal
          Priority: P2
         Component: SVG
        AssignedTo: webkit-unassigned at lists.webkit.org
        ReportedBy: rich at indieimage.com


Created an attachment (id=43990)
 --> (https://bugs.webkit.org/attachment.cgi?id=43990)
Test case

Animating an <svg> element via the DOM leaves ugly tearing artifacts on the
screen that remain until a redraw is forced (i.e. by resizing the window).

The included SVG file causes a blue rectangle to move continuously (and
randomly) around the screen, leaving plenty of tearing artifacts. The blue
rectangle is represented by an <svg> object containing a <rect>:

    <svg id="card" width="100" height="140" x="50" y="100">
        <rect class="card-back" width="100" height="140" rx="10" ry="10"
fill="blue" stroke="black" stroke-width="2" />
    </svg>

if the animation were applied directo to the <rect> element, no tearing occurs.
The tearing only happens when the target of the animation is the <svg> element.

If the <svg id="card"> element is placed inside a <g> element (strangely
enough), this bug disappears.

(Tested on Mac OS X 10.5 and both Safari 4.0.4 and nightly r51397, the latest
version as of 11/29/2009.)

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