221067 2021-01-27 16:37:23 -0800 [GTK] Page scrolling by wheel events doesn't work in non-AC mode pages if Hardware Acceleration Policy is changed dynamically from "always" to "never" 2021-05-09 19:13:54 -0700 1 1 1 Unclassified WebKit Scrolling WebKit Nightly Build Unspecified Unspecified RESOLVED DUPLICATE 225512 InRadar P2 Normal --- 186364 1 fujii fujii alicem cgarcia don.olmstead magomez simon.fraser tsavell webkit-bug-importer oldest_to_newest 1723204 0 fujii 2021-01-27 16:37:23 -0800 Page scrolling by wheel events doesn't work in non-AC mode pages if async scrolling is enabled (WinCairo) I'm trying to enable Async Scrolling for WinCairo. Attachment#418496 is the WIP patch. 1. Start MiniBrowser 2. Go to a non-AC mode page. For example, https://trac.webkit.org/wiki Or, disable Accelerated Compositing by using menu. 3. Rolling the wheel of the mouse 4. the page doesn't scroll as expected Mac port is setting setForceCompositingMode(true). There was a similar issue: Bug 219547 – REGRESSION(r270425) [GTK] wheel scrolling stopped working 1723205 1 418598 fujii 2021-01-27 16:38:28 -0800 Created attachment 418598 WIP patch 1723242 2 fujii 2021-01-27 18:06:01 -0800 GTK port disables Threaded Scrolling in the default mode WEBKIT_HARDWARE_ACCELERATION_POLICY_ON_DEMAND. https://github.com/WebKit/WebKit/blob/409d2a1d7c100ee0b7996b26a3b12ec2207609fc/Source/WebKit/UIProcess/gtk/WebPreferencesGtk.cpp#L49 So, a scrolling tree isn't generated for the page. https://github.com/WebKit/WebKit/blob/409d2a1d7c100ee0b7996b26a3b12ec2207609fc/Source/WebKit/WebProcess/WebPage/WebPage.cpp#L742 1723245 3 fujii 2021-01-27 18:26:19 -0800 See also: Bug 202449 – [GTK][WPE] Enable async scrolling 1723260 4 fujii 2021-01-27 19:43:04 -0800 setForceCompositingMode | setThreadedScrollingEnabled | | v v true true : Good (Mac, GTK, WPE) false false : Good (GTK) false true : Bad (WinCairo) It seems that WinCairo should align with other ports. There are WKPreferencesSetAcceleratedCompositingEnabled and WKPreferencesSetThreadedScrollingEnabled. However, no API corresponding to setForceCompositingMode. 1723270 5 418609 fujii 2021-01-27 20:22:37 -0800 Created attachment 418609 WIP patch 1725300 6 418609 fujii 2021-02-03 12:59:21 -0800 Comment on attachment 418609 WIP patch View in context: https://bugs.webkit.org/attachment.cgi?id=418609&action=review > Source/WebKit/WebProcess/WebPage/CoordinatedGraphics/DrawingAreaCoordinatedGraphics.cpp:256 > + settings.setForceCompositingMode(store.getBoolValueForKey(WebPreferencesKey::acceleratedCompositingEnabledKey())); This patch doesn't work well in the case of disabling AC in runtime by using WKPreferencesSetAcceleratedCompositingEnabled(pref, false) because the WebKit::WebPage already has a scrolling tree. This problem can be reproduced with GTK MiniBrowser by switching compositing policy from 'always' to 'never' in runtime. 1726527 7 fujii 2021-02-07 18:37:15 -0800 (In reply to Fujii Hironori from comment #6) > This problem can be reproduced with GTK MiniBrowser by switching > compositing policy from 'always' to 'never' in runtime. I'm going to fix the GTK problem in this bug ticket. 1. Start GTK MiniBrowser 2. Set Hardware Acceleration Policy to "always" in Preferences 3. Go to a non-AC mode page. For example, https://trac.webkit.org/wiki 4. Set Hardware Acceleration Policy to "never" in Preferences 5. Reload 6. Roll the mouse wheel 7. The page scrolling doesn't work as expected. 1726538 8 419553 fujii 2021-02-07 20:24:51 -0800 Created attachment 419553 Patch 1726561 9 cgarcia 2021-02-08 01:40:33 -0800 hmm, does this mean that it would be possible to always use the async scrolling for AC mode? We currently enable it only when forced, assuming that it was needed to be enabled from the very beginning and it couldn't be enabled/disabled on demand. 1726714 10 simon.fraser 2021-02-08 11:22:17 -0800 It would be much more reliable if AC were always enabled in GTK. 1726721 11 fujii 2021-02-08 11:49:33 -0800 (In reply to Carlos Garcia Campos from comment #9) > hmm, does this mean that it would be possible to always use the async > scrolling for AC mode? We currently enable it only when forced, assuming > that it was needed to be enabled from the very beginning and it couldn't be > enabled/disabled on demand. Good point. But, I don't know the answer. I will test and check more the case. Do you think that dynamically changing Hardware Acceleration Policy isn't supported in GTK port? 1726722 12 fujii 2021-02-08 11:49:44 -0800 (In reply to Simon Fraser (smfr) from comment #10) > It would be much more reliable if AC were always enabled in GTK. Yeah, I know Appple devs want to remove non-AC mode support from WebKit2. However, GTK, WPE, PlayStation and WinCairo is still using non-AC mode in WebKit2. WPE port is disabling accelerated compositing if it failed to create EGL context. https://github.com/WebKit/WebKit/blob/f0f02bbbc09b40caf023955b32ca5c37639346f2/Source/WebKit/WebProcess/WebPage/CoordinatedGraphics/DrawingAreaCoordinatedGraphics.cpp#L251,L252 1726934 13 fujii 2021-02-08 20:15:18 -0800 (In reply to Fujii Hironori from comment #11) > (In reply to Carlos Garcia Campos from comment #9) > > hmm, does this mean that it would be possible to always use the async > > scrolling for AC mode? We currently enable it only when forced, assuming > > that it was needed to be enabled from the very beginning and it couldn't be > > enabled/disabled on demand. > > Good point. But, I don't know the answer. I will test and check more the > case. I tested dynamically enabling/disabling force compositing mode by changing Hardware Acceleration Policy in GTK MiniBrowser. It works nicely. Also tested setThreadedScrollingEnabled(true) in "ondemand" Hardware Acceleration Policy. It also works nicely. 1726967 14 cgarcia 2021-02-09 00:30:57 -0800 (In reply to Simon Fraser (smfr) from comment #10) > It would be much more reliable if AC were always enabled in GTK. We tried once and it didn't work for several reasons. First problem was memory consumption, the GL context created in every web process increases the memory usage. That's not a problem when you have just a few web views, but it became a problem when the browser had lots of tabs opened. Second problem was dealing with graphics drivers in linux. Our plan is to switch to AC mode only when building with GTK4, and try to improve the memory consumption (with tab suspension, for example). Or maybe the memory consumption is no longer a problem when using the GPU process. But for now, we have to keep the ondemand mode (note also that now ondemand never goes back to non-AC for a page after entering AC mode). 1726968 15 cgarcia 2021-02-09 00:31:52 -0800 (In reply to Fujii Hironori from comment #13) > (In reply to Fujii Hironori from comment #11) > > (In reply to Carlos Garcia Campos from comment #9) > > > hmm, does this mean that it would be possible to always use the async > > > scrolling for AC mode? We currently enable it only when forced, assuming > > > that it was needed to be enabled from the very beginning and it couldn't be > > > enabled/disabled on demand. > > > > Good point. But, I don't know the answer. I will test and check more the > > case. > > I tested dynamically enabling/disabling force compositing mode by > changing Hardware Acceleration Policy in GTK MiniBrowser. It > works nicely. > > Also tested setThreadedScrollingEnabled(true) in "ondemand" > Hardware Acceleration Policy. It also works nicely. That's great, we should always enable async scrolling then, after this patch lands. Thanks! 1729002 16 fujii 2021-02-14 12:18:54 -0800 Darin asked me no to add a platform prefix "[GTK]" in the bug title for cross-platform code change. 1729003 17 420247 fujii 2021-02-14 12:22:54 -0800 Created attachment 420247 Patch 1729254 18 420247 fujii 2021-02-15 11:14:54 -0800 Comment on attachment 420247 Patch Clearing flags on attachment: 420247 Committed r272867 (234101@main): <https://commits.webkit.org/234101@main> 1729255 19 fujii 2021-02-15 11:14:59 -0800 All reviewed patches have been landed. Closing bug. 1729258 20 webkit-bug-importer 2021-02-15 11:17:04 -0800 <rdar://problem/74357679> 1729446 21 tsavell 2021-02-15 16:24:01 -0800 It looks like the changes in https://trac.webkit.org/changeset/272867/webkit broke 50+ tests on Mac Debug wk2 https://build.webkit.org/results/Apple-BigSur-Debug-WK2-Tests/r272879%20(158)/results.html I am able to reproduce this on r272867 but not r272866 1729447 22 tsavell 2021-02-15 16:27:22 -0800 Reverted r272867 for reason: Broke 50+ fast/layoutformattingcontext/ tests on Mac Debug WK2 Committed r272891 (234124@main): <https://commits.webkit.org/234124@main> 1730082 23 420581 fujii 2021-02-16 18:57:00 -0800 Created attachment 420581 absolute-positioned-box-with-inline-sibling-crash-log.txt Thank you for reverting my patch. fast/layoutformattingcontext tests were failing because WebPage::enterAcceleratedCompositingMode was called twice. The first time by RenderLayerCompositor::attachRootLayer, the second time by LayerController::attachRootLayer. These tests are setting LayoutFormattingContextEnabled=true in the test header. 1734298 24 fujii 2021-02-28 13:28:05 -0800 I'm still investigating the assertion failure. I need more time. I'm going to split the patch and land the part of it. Bug 222529 – EventDispatcher::wheelEvent is accessing m_scrollingTrees without locking m_scrollingTreesMutex since r271235 1758413 25 fujii 2021-05-09 19:13:54 -0700 *** This bug has been marked as a duplicate of bug 225512 *** 418598 2021-01-27 16:38:28 -0800 2021-02-07 20:24:42 -0800 WIP patch scrolling-tree.diff text/plain 1795 fujii ZGlmZiAtLWdpdCBhL1NvdXJjZS9XZWJLaXQvV2ViUHJvY2Vzcy9XZWJQYWdlL1dlYlBhZ2UuY3Bw IGIvU291cmNlL1dlYktpdC9XZWJQcm9jZXNzL1dlYlBhZ2UvV2ViUGFnZS5jcHAKaW5kZXggOWU1 MDkxMDQ0NzU5Li4wZGQxZWY4YTU1OTIgMTAwNjQ0Ci0tLSBhL1NvdXJjZS9XZWJLaXQvV2ViUHJv Y2Vzcy9XZWJQYWdlL1dlYlBhZ2UuY3BwCisrKyBiL1NvdXJjZS9XZWJLaXQvV2ViUHJvY2Vzcy9X ZWJQYWdlL1dlYlBhZ2UuY3BwCkBAIC03MzgsMTEgKzczOCw2IEBAIFdlYlBhZ2U6OldlYlBhZ2Uo UGFnZUlkZW50aWZpZXIgcGFnZUlELCBXZWJQYWdlQ3JlYXRpb25QYXJhbWV0ZXJzJiYgcGFyYW1l dGVycykKICAgICB3ZWJQYWdlQ291bnRlci5pbmNyZW1lbnQoKTsKICNlbmRpZgogCi0jaWYgRU5B QkxFKFNDUk9MTElOR19USFJFQUQpCi0gICAgaWYgKG1fdXNlQXN5bmNTY3JvbGxpbmcpCi0gICAg 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