[Webkit-unassigned] [Bug 228896] CSS animation timing is broken

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=228896

--- Comment #6 from Simon Fraser (smfr) <simon.fraser at apple.com> ---
This is about interpolation via matrix decomposition.

We decompose the scaleX(0) matrix to:
(WebCore::TransformationMatrix::Decomposed2Type) $1 = (scaleX = 0, scaleY = 1, translateX = 0, translateY = 0, angle = 0, m11 = 0, m12 = 0, m21 = 0, m22 = 1)

and the scale(1) matrix to:
(WebCore::TransformationMatrix::Decomposed2Type) $2 = (scaleX = 1, scaleY = 1, translateX = 0, translateY = 0, angle = 0, m11 = 1, m12 = 0, m21 = 0, m22 = 1)

then interpolate scaleX and m11. Recomposing the matrix then causes m11 to affect scaleX in matrix[0][0]

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