[Webkit-unassigned] [Bug 58054] REGRESSION (WebKit2): Accelerated CSS animations have a lower framerate than in WebKit1

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=58054





--- Comment #10 from Adam Roben (:aroben) <aroben at apple.com>  2011-05-31 13:59:15 PST ---
(In reply to comment #9)
> (In reply to comment #4)
> > And we need to make sure [windowed plugins] still get scrolled correctly.
> 
> This is a little tricky to get right. We need to scroll them when the WKCACFView renders to the screen, which can happen on a background thread.

I tried making WKCACFView call ::SetWindowRgn/::DeferWindowPos from its background thread. This causes a deadlock because this causes the background thread to block on the main thread, but the main thread may already be blocked on a mutex that is held by the background thread.

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