[Webkit-unassigned] [Bug 110357] ClippPath artifacts due to mask image clamping

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=110357





--- Comment #3 from Matt <matt.liberty at gmail.com>  2013-02-23 10:03:31 PST ---
I reported the original issue in chromium.  I mentioned there that I hit this when using a scale transform but reduced it to having large coordinates in the reproducer I filed.  I made a slightly different reproducer that is closer to my original problem and uses a scale transform.  You can see it at http://jsfiddle.net/maliberty/KAxLq

It shows the same clipping artifact but the untransformed clippath is small enough to fit in a 4096x4096 buffer.  It is applied to shapes that are themselves inside the same transform group.  It would seem you could apply the clippath pre-transform and then transform the result without any of these issues.  It would solve my particular issue though not the more general problem that has been discussed here.  Is this reasonable?

Note that Safari 5.1.7 doesn't have a problem with either case.  That was surprising to some but it is verifiable and it would be nice to understand why it works there.

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