[Webkit-unassigned] [Bug 110355] Get rid of "non-composited contents" in CoordinatedLayerTreeHost

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=110355





--- Comment #5 from Noam Rosenthal <noam at webkit.org>  2013-03-04 07:15:17 PST ---
(In reply to comment #4)
> Currently, two CoordinatedTiles use the same UpdateAtlas in the same time. It is a bug that can crash in some platforms.
> 
> For example,
> 1. m_nonCompositedContentLayer->flushCompositingStateForThisLayerOnly();
> 2. CoordinatedTile::updateBackBuffer()
> 3. FrameView::paintContents()
> 4. FrameView::flushCompositingStateForThisFrame()
> 5. CoordinatedGraphicsLayer::flushCompositingStateForThisLayerOnly()
> 6. CoordinatedTile::updateBackBuffer()
> 
> #2 calls UpdateAtlas::beginPaint and #6 also calls UpdateAtlas::beginPaint before #2 is completed.
> 
> I think if this bug is resolved, above bug is also resolved.
You can probably fix this one by changing CoordinatedLayerTreeHost to call 
    bool didSync = m_webPage->corePage()->mainFrame()->view()->flushCompositingStateIncludingSubframes();
before the other flushes.

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