61808 2011-05-31 14:35:54 -0700 REGRESSION (5.0.5-ToT, WebKit2): Flash to white when navigating between pages on wsj.com, other sites (when navigating away from composited page) 2011-05-31 15:12:09 -0700 1 1 1 Unclassified WebKit WebKit2 528+ (Nightly build) Unspecified Unspecified RESOLVED FIXED InRadar, Regression P1 Normal --- 1 mitz mitz darin simon.fraser oldest_to_newest 412867 0 mitz 2011-05-31 14:35:54 -0700 REGRESSION (5.0.5-ToT, WebKit2): Flash to white when navigating between pages on wsj.com, other sites (when navigating away from composited page) 412868 1 mitz 2011-05-31 14:36:50 -0700 <rdar://problem/9523192> 412881 2 95487 mitz 2011-05-31 14:46:42 -0700 Created attachment 95487 Patch 412892 3 95487 darin 2011-05-31 14:56:30 -0700 Comment on attachment 95487 Patch If neither Anders nor Simon plans to review this, I would be willing to. 412893 4 95487 simon.fraser 2011-05-31 14:59:08 -0700 Comment on attachment 95487 Patch View in context: https://bugs.webkit.org/attachment.cgi?id=95487&action=review > Source/WebKit2/ChangeLog:9 > + WebKit1 has a mechanism to prevent the stale bits from the outgoing page from being erased > + until the incoming page has layout. Adapt this in WebKit2 to prevent the composited layer tree Ironically the WK1 mechanism doesn't do anything with the layer tree, causing layers to get torn down prematurely. > Source/WebKit2/WebProcess/WebCoreSupport/WebFrameLoaderClient.cpp:1032 > void WebFrameLoaderClient::frameLoadCompleted() > { > - notImplemented(); > + WebPage* webPage = m_frame->page(); > + if (!webPage) > + return; > + > + if (m_frame == m_frame->page()->mainFrame()) > + webPage->drawingArea()->setLayerTreeStateIsFrozen(false); > } What's the timing of frameLoadCompleted(), relative to load events etc? Keeping the layer tree frozen until the load event fires would be bad, I think. > Source/WebKit2/WebProcess/WebPage/ca/mac/LayerTreeHostCAMac.mm:99 > + if (m_layerFlushSchedulingEnabled) > + return; I wonder if we should detect that a flush should have been scheduled, and schedule one here? It seems that we could have have layer changes early in the load that will never get flushed with the current code. 412913 5 95487 simon.fraser 2011-05-31 15:10:16 -0700 Comment on attachment 95487 Patch View in context: https://bugs.webkit.org/attachment.cgi?id=95487&action=review >> Source/WebKit2/WebProcess/WebCoreSupport/WebFrameLoaderClient.cpp:1032 >> } > > What's the timing of frameLoadCompleted(), relative to load events etc? Keeping the layer tree frozen until the load event fires would be bad, I think. Oh, I see the above call in dispatchDidFirstLayout() now. This is OK. 412915 6 mitz 2011-05-31 15:12:09 -0700 Fixed in r87755. <http://trac.webkit.org/changeset/87755> 95487 2011-05-31 14:46:42 -0700 2011-05-31 15:10:16 -0700 Patch bug-61808-20110531144640.patch text/plain 15408 mitz SW5kZXg6IFNvdXJjZS9XZWJLaXQyL0NoYW5nZUxvZwo9PT09PT09PT09PT09PT09PT09PT09PT09 PT09PT09PT09PT09PT09PT09PT09PT09PT09PT09PT09PT09PT09PT09Ci0tLSBTb3VyY2UvV2Vi S2l0Mi9DaGFuZ2VMb2cJKHJldmlzaW9uIDg3NzUxKQorKysgU291cmNlL1dlYktpdDIvQ2hhbmdl TG9nCSh3b3JraW5nIGNvcHkpCkBAIC0xLDMgKzEsNTUgQEAKKzIwMTEtMDUtMzEgIERhbiBCZXJu c3RlaW4gIDxtaXR6QGFwcGxlLmNvbT4KKworICAgICAgICBSZXZpZXdlZCBieSBOT0JPRFkgKE9P UFMhKS4KKworICAgICAgICA8cmRhcjovL3Byb2JsZW0vOTUyMzE5Mj4gUkVHUkVTU0lPTiAoNS4w LjUtVG9ULCBXZWJLaXQyKTogRmxhc2ggdG8gd2hpdGUgd2hlbiBuYXZpZ2F0aW5nIGJldHdlZW4g cGFnZXMgb24gd3NqLmNvbSwgb3RoZXIgc2l0ZXMgKHdoZW4gbmF2aWdhdGluZyBhd2F5IGZyb20g Y29tcG9zaXRlZCBwYWdlKQorICAgICAgICBodHRwczovL2J1Z3Mud2Via2l0Lm9yZy9zaG93X2J1 Zy5jZ2k/aWQ9NjE4MDgKKworICAgICAgICBXZWJLaXQxIGhhcyBhIG1lY2hhbmlzbSB0byBwcmV2 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