[Webkit-unassigned] [Bug 105458] [chromium] Add WebLayer::setIgnoresContinuousPainting() API and use it to ignore the PageOverlay's layer.

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=105458





--- Comment #11 from egraether at chromium.org  2013-01-08 10:06:24 PST ---
(In reply to comment #9)
> (From update of attachment 181560 [details])
> View in context: https://bugs.webkit.org/attachment.cgi?id=181560&action=review
> 
> In talking with Nat it came up that rather than exposing per-layer bits and spreading logic for what layers have what behavior in this mode, it might make more sense to to have all of the continuous painting logic dependent on specific layers driven completely by the WebKit side.  Then any changes in what things you want to include or exclude can be made purely in WebKit.  You can see an example of code that iterates through GraphicsLayers to do things in WebViewBenchmarkSupportImpl.cpp (although I suspect that particular file is on its way out, but it's not much code).  If you handled the invalidations in that way instead of doing them in cc/layer_tree_host.cc, you could decide to invalidate or not invalidate layers based on any information available in WebKit.  If it turns out that there isn't too much code spread around then having it split across cc/ and WebKit might be OK, but it will make iterating on it more difficult.
> 
> What do you think, Eberhard?

Makes sense. I uploaded a new patch with a working draft, please have a look.

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