Bug 57318 – Incorrect offset of svg <use> element which is in <symbol> element

• Component: SVG
• Status: RESOLVED FIXED

[Leo Yang]

When a svg <use> is in <symbol> webkit won't take offset into account. The following code should be rendered
as a 100*100 green rectangle visually. Patch is coming soon...

<?xml version="1.0" standalone="no"?>
<svg xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" version="1.0" width="100" height="100">
    <defs>
        <symbol id="s" viewBox="0 0 1 2">
            <rect fill="green" width="1" height="2" />
        </symbol>
        <symbol id="s1" viewBox="0 0 2 2">
            <use xlink:href="#s" x="0" y="0" width="1" height="2" />
            <use xlink:href="#s" x="1" y="0" width="1" height="2" />
        </symbol>
    </defs>
    <use xlink:href="#s1" x="0" y="0" width="100" height="100" />
</svg>

[Leo Yang]

Created attachment 87291 [details]
Patch

[Dirk Schulze]

Comment on attachment 87291 [details]
Patch

Why does it just affect symbol? what about svg or other elements?

[Nikolas Zimmermann]

Comment on attachment 87291 [details]
Patch

Great catch again! Dirk: SVGShadowTreeContainerElement is only used for symbols, thus that's the only way the bug can be triggered.
Leo, does this affect Sierpinski carpet?

[WebKit Commit Bot]

Comment on attachment 87291 [details]
Patch

Clearing flags on attachment: 87291

Committed r82242: <http://trac.webkit.org/changeset/82242>

[WebKit Commit Bot]

All reviewed patches have been landed.  Closing bug.

[Leo Yang]

(In reply to comment #3)
> (From update of attachment 87291 [details])
> Great catch again! Dirk: SVGShadowTreeContainerElement is only used for symbols, thus that's the only way the bug can be triggered.
> Leo, does this affect Sierpinski carpet?

Yes, webkit renders Sierpinski_carpet_6.svg fine with this patch.