187553 2018-07-11 07:02:17 -0700 REGRESSION (r232356): After zooming a page in and out, it's possible to temporarily have missing tiles (google.com, apple.com) 2018-07-12 13:11:39 -0700 1 1 1 Unclassified WebKit Layout and Rendering WebKit Nightly Build Unspecified Unspecified RESOLVED FIXED InRadar P2 Normal --- 1 koivisto webkit-unassigned bfulgham commit-queue simon.fraser zalan oldest_to_newest 1441155 0 koivisto 2018-07-11 07:02:17 -0700 We ignore zoom scale from UI process if it doesn't match the last remote layer tree transaction. However nothing guarantees that we receive the real scale again until user interacts with the page. After r232356 this can cause visibly missing tiles, before the problem was covered by creating too many of them. 1441461 1 koivisto 2018-07-12 05:08:03 -0700 <rdar://problem/30404627> 1441462 2 koivisto 2018-07-12 05:08:33 -0700 I mean <rdar://problem/41863803> 1441463 3 344839 koivisto 2018-07-12 05:27:19 -0700 Created attachment 344839 patch 1441591 4 344839 simon.fraser 2018-07-12 11:26:57 -0700 Comment on attachment 344839 patch View in context: https://bugs.webkit.org/attachment.cgi?id=344839&action=review > Source/WebKit/WebProcess/WebPage/WebPage.h:1669 > + float m_lastTransactionPageScaleFactor { 0 }; We store page scale as a double in RemoteLayerTreeTransaction and we've certainly had bugs with float/double precision mismatch before, so should this be a double, and/or do matching with epsilon? > Source/WebKit/WebProcess/WebPage/WebPage.h:1670 > + uint64_t m_lastTransactionIDWithScaleChange { 0 }; I wish we had a typedef for transactionIDs :( 1441606 5 344865 koivisto 2018-07-12 11:41:55 -0700 Created attachment 344865 patch 1441646 6 344865 commit-queue 2018-07-12 13:11:37 -0700 Comment on attachment 344865 patch Clearing flags on attachment: 344865 Committed r233780: <https://trac.webkit.org/changeset/233780> 1441647 7 commit-queue 2018-07-12 13:11:39 -0700 All reviewed patches have been landed. Closing bug. 344839 2018-07-12 05:27:19 -0700 2018-07-12 11:41:55 -0700 patch out-of-sync-scale-2.patch text/plain 4252 koivisto SW5kZXg6IFNvdXJjZS9XZWJLaXQvQ2hhbmdlTG9nCj09PT09PT09PT09PT09PT09PT09PT09PT09 PT09PT09PT09PT09PT09PT09PT09PT09PT09PT09PT09PT09PT09PT0KLS0tIFNvdXJjZS9XZWJL aXQvQ2hhbmdlTG9nCShyZXZpc2lvbiAyMzM3NjUpCisrKyBTb3VyY2UvV2ViS2l0L0NoYW5nZUxv Zwkod29ya2luZyBjb3B5KQpAQCAtMSwzICsxLDMyIEBACisyMDE4LTA3LTEyICBBbnR0aSBLb2l2 aXN0byAgPGFudHRpQGFwcGxlLmNvbT4KKworICAgICAgICBSRUdSRVNTSU9OIChyMjMyMzU2KTog QWZ0ZXIgem9vbWluZyBhIHBhZ2UgaW4gYW5kIG91dCwgaXQncyBwb3NzaWJsZSB0byB0ZW1wb3Jh cmlseSBoYXZlIG1pc3NpbmcgdGlsZXMgKGdvb2dsZS5jb20sIGFwcGxlLmNvbSkKKyAgICAgICAg aHR0cHM6Ly9idWdzLndlYmtpdC5vcmcvc2hvd19idWcuY2dpP2lkPTE4NzU1MworICAgICAgICA8 cmRhcjovL3Byb2JsZW0vNDE4NjM4MDM+CisKKyAgICAgICAgUmV2aWV3ZWQgYnkgTk9CT0RZIChP T1BTISkuCisKKyAgICAgICAgV2UgaWdub3JlIHpvb20gc2NhbGUgZnJvbSBVSSBwcm9jZXNzIGlm IGl0IGRvZXNuJ3QgbWF0Y2ggdGhlIGxhc3QgcmVtb3RlIGxheWVyIHRyZWUgdHJhbnNhY3Rpb24u 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