Bug 114578 – vector-effect: non-scaling-stroke not recognized when animating

• Status: RESOLVED
• Resolution: FIXED
• Component: SVG

[Stuart P. Bentley]

Created attachment 197972 [details]
Test case

Strokes with the style {vector-effect: non-scaling-stroke} are scaled when transforming an SVG by setting an otherwise-unspecified viewBox via animation.

Tested on Windows 7 @ Chrome stable, Windows 8 @ Chrome dev, Arch Linux @ Chromium 26.0.1410.63, and Android 4.2.1 @ Chrome latest.

See attached test case.

In writing this test case, I found that the "Desired behavior" (employing a workaround by setting the viewBox attribute to the end result) produces artifacts when animating on Windows and Linux. This is not part of the desired behavior, and I will file a bug summarily.

[Stuart P. Bentley]

Created attachment 197973 [details]
Unrelated artifacts

When noting the desired behavior, ignore the creation of artifacts like those outlined in red in this screenshot.

[Stuart P. Bentley]

Unrelated artifact bug filed as Bug 114579.

[Stuart P. Bentley]

(In reply to comment #0)

> Tested on Windows 7 @ Chrome stable, Windows 8 @ Chrome dev, Arch Linux @ Chromium 26.0.1410.63, and Android 4.2.1 @ Chrome latest.

s/Windows 7 @ Chrome stable, Windows 8 @ Chrome dev/Windows 7 @ Chrome dev, Windows 8 @ Chrome stable/

[Stuart P. Bentley]

Created attachment 197978 [details]
Test case

Further testing has revealed that *any* value on the viewBox attribute will inhibit this bug. Uploading simplified test case with viewBox="".

[Dirk Schulze]

I agree that this is a bug. It looks like we do not take the viewBox transform into account for reverse transforming.

Thanks for reporting.

[Andreas Kling]

Merged the fix for this from blink in <http://trac.webkit.org/changeset/149102> (thanks pdr!)

[Philip Rogers]

(In reply to comment #6)
> Merged the fix for this from blink in <http://trac.webkit.org/changeset/149102> (thanks pdr!)

Aww man, I was preparing a patch for WebKit.

Thanks for merging this though.