[Webkit-unassigned] [Bug 89519] Elements absolutely positioned to bottom or right may be off by one pixel with sub-pixel layout

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=89519


Levi Weintraub <leviw at chromium.org> changed:

           What    |Removed                     |Added
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                 CC|                            |jamesr at chromium.org




--- Comment #6 from Levi Weintraub <leviw at chromium.org>  2012-06-21 14:50:16 PST ---
(In reply to comment #5)
> The changes to RenderLayer.cpp are similar to what I've been trying, while it might not be the right place for it the concept seems reasonable in that we want to ensure that the values are aligned based on the bottom/right edges.

I was troubled by the change to Length to round the value, but prior to our change to make Lengths floats, this was what occurred anyways. This makes me feel a little more comfortable.

The test case attached is fine for the RenderLayer change (which I'm still not very proud of, but I haven't come up with a better solution), but I have no idea how to write a test to ensure we aren't triggering jittering during an animation... Adding Jamesr who may have advice?

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