[Webkit-unassigned] [Bug 84306] [Qt][WK2] Fixed layers are shaking when zoom level is not 1.0 due to a rounding error.

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=84306





--- Comment #11 from Noam Rosenthal <noam.rosenthal at nokia.com>  2012-04-26 12:59:09 PST ---
(From update of attachment 139036)
View in context: https://bugs.webkit.org/attachment.cgi?id=139036&action=review

> Source/WebKit2/UIProcess/API/qt/qquickwebview.cpp:796
> +    if (layerTreeHostProxy->layerTreeRenderer())
> +        layerTreeHostProxy->layerTreeRenderer()->setRoundingAdjustment(FloatSize(accurateVisibleRect.x() - visibleRect.x() * scale, accurateVisibleRect.y() - visibleRect.y() * scale));

Are you sure this should happen in commitScale? Seems like it would cause a small flicker since the rounding adjustment is only needed a bit later, after the committed scale has been actually rendered in the web process.

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