[Webkit-unassigned] [Bug 51262] WebPageProxy should delete its backing store after not painting for a while

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=51262





--- Comment #25 from Adam Roben (aroben) <aroben at apple.com>  2011-02-11 14:06:41 PST ---
(In reply to comment #20)
> 3) The next time DrawingAreaProxyImpl::paint is called, if we still don't have a backing store and we're not waiting for a DidSetSize message, send the DrawingAreaImpl a DisplayNow message (again, better names are welcome!) and use the waitForAndDispatchImmediately logic to block for up to some small amount of time until we receive the next Update message. Then proceed with painting.

This could be problematic. If there's already an Update message in the queue from before the InvalidateEverything message reached DrawingAreaImpl, the Update won't contain an image of the entire view. Maybe we need to use a different message (i.e., DidDisplayNow). If we do that, we *will* need to generalize the m_lastDidSetSizeSequenceNumber logic.

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