Bug 88198 – Non-scaling strokes in patterns assert / render incorrectly

• Component: SVG
• Status: RESOLVED FIXED

[Philip Rogers]

Created attachment 145494 [details]
Testcase

See the attached testcase.

The assert is:
SHOULD NEVER BE REACHED
third_party/WebKit/Source/WebCore/svg/SVGStyledElement.cpp(454) : virtual WebCore::AffineTransform WebCore::SVGStyledElement::localCoordinateSpaceTransform(SVGLocatable::CTMScope) const

Patch forthcoming.

[Philip Rogers]

Created attachment 145495 [details]
Expose SVGPatternElement's transform, fixing an assertion

[Dirk Schulze]

Comment on attachment 145495 [details]
Expose SVGPatternElement's transform, fixing an assertion

According to your description, the same assertion should happen on Mask and ClipPath(maybe not ClipPath), no? r=me for this one. If clipPath and Mask are affected as well, we might refactor the code again.

[WebKit Review Bot]

Comment on attachment 145495 [details]
Expose SVGPatternElement's transform, fixing an assertion

Clearing flags on attachment: 145495

Committed r119391: <http://trac.webkit.org/changeset/119391>

[WebKit Review Bot]

All reviewed patches have been landed.  Closing bug.

[János Badics]

Unfortunately this new test:
svg/stroke/non-scaling-stroke-pattern.svg
fails on Qt, GTK and EFL ports. A new bug has been created for the issue:
https://bugs.webkit.org/show_bug.cgi?id=88230

[Philip Rogers]

Fix for broken Qt/Efl/Gtk failures landed: http://trac.webkit.org/changeset/119402


Dirk,
I looked into doing the same for SVGMaskElement and SVGClipPathElement and this turns out to not be required.
SVGClipPathElement is spec'ed to extend from SVGLocatable which handles the CTM call. SVGMaskElement is spec'ed to _not_ extend from SVGLocatable but in WebKit it actually does extend from SVGStyledLocatableElement so everything works as expected.