ASSIGNED132100
Subpixel rendering: RenderLayer's dirtyrect/clipping should device pixelsnap the same way painting does. 
https://bugs.webkit.org/show_bug.cgi?id=132100
Summary Subpixel rendering: RenderLayer's dirtyrect/clipping should device pixelsnap ...
alan
Reported 2014-04-23 19:37:11 PDT
Currently it uses enclosingrect. (selfClipRect(), childrenClipRect(). see paintDirtyRect = selfClipRect(); at RenderLayer::paintLayerContents (when css overflow: scroll etc is present, it results in wrong cliprects) <div id='foo' style="overflow: scroll; display: none; border: 1px solid black; position: fixed; left: 10px; top: 10.3px; width: 20px; height: 20.1px;"></div>
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