59035 2011-04-20 16:28:43 -0700 WebKit2: Need a way to get a snapshot of the visible contents of a page from the UI Process 2011-04-21 11:24:35 -0700 1 1 1 Unclassified WebKit WebKit2 528+ (Nightly build) All All RESOLVED FIXED InRadar P2 Normal --- 1 jberlin jberlin abarth andersca eric jberlin sam webkit.review.bot oldest_to_newest 389610 0 jberlin 2011-04-20 16:28:43 -0700 <rdar://problem/8607239> 389628 1 90443 jberlin 2011-04-20 16:40:29 -0700 Created attachment 90443 Patch 389656 2 90443 bweinstein 2011-04-20 17:11:18 -0700 Comment on attachment 90443 Patch View in context: https://bugs.webkit.org/attachment.cgi?id=90443&action=review I'm going to let Sam review this, just a couple comments I had. > Source/WebKit2/ChangeLog:22 > + with a scale factor of 1. Is this correct if the view is currently scaled when we ask for the snapshot? The visible contents might be at a scale factor of 2, would we expect the snapshot to show that? > Source/WebKit2/UIProcess/WebPageProxy.cpp:3032 > + process()->sendSync(Messages::WebPage::VisibleContentsSnapshot(), Messages::WebPage::VisibleContentsSnapshot::Reply(snapshotHandle), m_pageID, 1); A constant would be nice for the 1 here. > Source/WebKit2/WebProcess/WebPage/WebPage.cpp:854 > + RefPtr<WebImage> snapshotImage = scaledSnapshotInDocumentCoordinates(contentRect, 1, ImageOptionsShareable); Do we want the 1 here? Or do we want the current scale factor of the frame? (Repeat of question in ChangeLog). 390082 3 jberlin 2011-04-21 09:26:17 -0700 (In reply to comment #2) > (From update of attachment 90443 [details]) > View in context: https://bugs.webkit.org/attachment.cgi?id=90443&action=review > > I'm going to let Sam review this, just a couple comments I had. Thanks for the feedback! > > > Source/WebKit2/ChangeLog:22 > > + with a scale factor of 1. > > Is this correct if the view is currently scaled when we ask for the snapshot? The visible contents might be at a scale factor of 2, would we expect the snapshot to show that? That is already taken into account when the snapshot is made of that rect. The scale factor is any additional scaling that is desired. > > > Source/WebKit2/UIProcess/WebPageProxy.cpp:3032 > > + process()->sendSync(Messages::WebPage::VisibleContentsSnapshot(), Messages::WebPage::VisibleContentsSnapshot::Reply(snapshotHandle), m_pageID, 1); > > A constant would be nice for the 1 here. Changed to be: // Do not wait for more than a second (arbitrary) for the WebProcess to get the snapshot so // that the UI Process is not permanently stuck waiting on a potentially crashing Web Process. static const double visibleContentsSnapshotSyncMessageTimeout = 1.0; process()->sendSync(Messages::WebPage::VisibleContentsSnapshot(), Messages::WebPage::VisibleContentsSnapshot::Reply(snapshotHandle), m_pageID, visibleContentsSnapshotSyncMessageTimeout); > > > Source/WebKit2/WebProcess/WebPage/WebPage.cpp:854 > > + RefPtr<WebImage> snapshotImage = scaledSnapshotInDocumentCoordinates(contentRect, 1, ImageOptionsShareable); > > Do we want the 1 here? Or do we want the current scale factor of the frame? (Repeat of question in ChangeLog). See earlier response. I will update the Changelog comment to say that using a scale factor of one preserves any scaling already done on the web page (e.g. by zooming in or out). 390115 4 90443 sam 2011-04-21 10:17:23 -0700 Comment on attachment 90443 Patch View in context: https://bugs.webkit.org/attachment.cgi?id=90443&action=review > Source/WebKit2/UIProcess/API/C/WKPagePrivate.h:69 > +WK_EXPORT WKImageRef WKPageVisibleContentsSnapshot(WKPageRef pageRef); This function name needs to Create in its name to indicate the ownership model. I think WKPageCreateSnapshotOfVisibleContent() to match the one in the bundle, would be good. We usually leave the Ref off the parameter name in the header. 390132 5 jberlin 2011-04-21 10:31:22 -0700 (In reply to comment #4) > (From update of attachment 90443 [details]) > View in context: https://bugs.webkit.org/attachment.cgi?id=90443&action=review > > > Source/WebKit2/UIProcess/API/C/WKPagePrivate.h:69 > > +WK_EXPORT WKImageRef WKPageVisibleContentsSnapshot(WKPageRef pageRef); > > This function name needs to Create in its name to indicate the ownership model. I think WKPageCreateSnapshotOfVisibleContent() to match the one in the bundle, would be good. Done (and changed all the other instances of visibleContentsSnapshot to createSnapshotOfVisibleContent). > > We usually leave the Ref off the parameter name in the header. I was wondering what our official style was for that. Fixed. 390146 6 90443 jberlin 2011-04-21 10:45:19 -0700 Comment on attachment 90443 Patch Committed in http://trac.webkit.org/changeset/84519 390177 7 webkit.review.bot 2011-04-21 11:24:35 -0700 http://trac.webkit.org/changeset/84519 might have broken Qt Linux ARMv7 Release and Qt Windows 32-bit Debug 90443 2011-04-20 16:40:29 -0700 2011-04-21 10:45:19 -0700 Patch visibleContentsSnapshotOpensource.patch text/plain 6922 jberlin SW5kZXg6IFNvdXJjZS9XZWJLaXQyL0NoYW5nZUxvZwo9PT09PT09PT09PT09PT09PT09PT09PT09 PT09PT09PT09PT09PT09PT09PT09PT09PT09PT09PT09PT09PT09PT09Ci0tLSBTb3VyY2UvV2Vi S2l0Mi9DaGFuZ2VMb2cJKHJldmlzaW9uIDg0NDMxKQorKysgU291cmNlL1dlYktpdDIvQ2hhbmdl TG9nCSh3b3JraW5nIGNvcHkpCkBAIC0xLDMgKzEsMjggQEAKKzIwMTEtMDQtMjAgIEplc3NpZSBC ZXJsaW4gIDxqYmVybGluQGFwcGxlLmNvbT4KKworICAgICAgICBSZXZpZXdlZCBieSBOT0JPRFkg KE9PUFMhKS4KKworICAgICAgICBXZWJLaXQyOiBOZWVkIGEgd2F5IHRvIGdldCBhIHNuYXBzaG90 IG9mIHRoZSB2aXNpYmxlIGNvbnRlbnRzIG9mIGEgcGFnZSBmcm9tIHRoZSBVSSBQcm9jZXNzLgor 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