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

bugzilla-daemon at webkit.org bugzilla-daemon at webkit.org
Fri Feb 11 13:22:42 PST 2011


--- Comment #23 from Adam Roben (aroben) <aroben at apple.com>  2011-02-11 13:22:42 PST ---
(In reply to comment #22)
> One case I didn't cover in comment 20:
> If DrawingAreaImpl sends an Update message between (1) and (2), DrawingAreaProxyImpl won't have a backing store to draw it into. But just creating a new backing store at that point won't be good enough, as the UpdateInfo will only contain images of parts of the page (whatever was invalid just before the Update was sent). We'll need to ignore that Update and send a DisplayNow message to the DrawingAreaImpl so it will send us another Update after it gets the InvalidateEverything message.

If we detect that the UpdateInfo does in fact contain an image of the entire page, we should just use it and skip the DisplayNow message.

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