[Webkit-unassigned] [Bug 258740] Fix shadow invalidation rect issue in vertical-rl mode

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=258740

--- Comment #3 from Ahmad Saleem <ahmad.saleem792 at gmail.com> ---
(In reply to zalan from comment #2)
> I'd look at the history of those flipped lines to see why we originally
> thought they needed flipping. Blink's commit message does not explain that
> (it just says it's erroneous)

Original bugs refer this:

Shadows and border images should be unrelated to writing-mode. Should not flip the edges when invalidating them despite writing-mode.

and in spec:

https://drafts.csswg.org/css-writing-modes-3/#physical-only

"The following values are purely physical in their definitions and do not respond to changes in writing mode:"

-> the offsets of the box-shadow and text-shadow properties

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