[Webkit-unassigned] [Bug 255368] Bring slerp interpolation in line with spec

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=255368

--- Comment #1 from Ahmad Saleem <ahmad.saleem792 at gmail.com> ---
Blink regressed this: Safari was doing correctly due to relying on system for doing animations (but if we are planning to change, we might have same bug):

After this change, will Blink match Safari?
If not, Safari can't change its behavior since it relies on the operation
system to do animations...

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Test Case mentioned in the Spec Discussion - https://jsfiddle.net/bpLx7gtq/show

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Blink regressed it here (as per documentation):

I think so, yes.  We got the "bad" behavior when we switched from
WebCore::TransformationMatrix to gfx::Transform, according to
<https://code.google.com/p/chromium/issues/detail?id=236018>.  A quick
test in Safari with the example code in my first post has it doing the
short-path animation.

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Another test case - https://jsfiddle.net/f2hxo9k6/

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