295538 2025-07-07 12:49:38 -0700 REGRESSION(287399@main): [Skia] Broke rendering of various PDFs 2026-01-06 11:27:08 -0800 1 1 1 Unclassified WebKit WebKitGTK WebKit Nightly Build PC Linux RESOLVED FIXED https://bugs.webkit.org/show_bug.cgi?id=283704 P2 Normal --- 1 mcatanzaro zimmermann bugs-noreply mcatanzaro plampe webkit-bug-importer zimmermann oldest_to_newest 2128237 0 mcatanzaro 2025-07-07 12:49:38 -0700 Load https://www.transitchicago.com/assets/1/6/Slow_Zone_Map_-_June_2025.pdf and scroll down to the second page. Notice the rendering is garbled and broken. I finally bisected it; sorry it took so long. This is a regression from 287399@main "[GTK][WPE][Skia] Allow cross-thread transfer of accelerated ImageBitmap". 2161243 1 mcatanzaro 2025-11-25 06:10:34 -0800 We should probably revert 287399@main. 2164861 2 mcatanzaro 2025-12-10 11:51:09 -0800 A revert actually does fix this bug, so let's do that for now. 2165092 3 plampe 2025-12-11 06:52:05 -0800 Yes, a revert is very good idea especially that the commit in question is just a performance improvement. Unless already reverted, I'll revert tomorrow. 2165137 4 mcatanzaro 2025-12-11 09:54:38 -0800 I prepared a revert in https://github.com/WebKit/WebKit/pull/55184 but I see I failed to link it to this bug report, oops. 2165787 5 zimmermann 2025-12-14 15:54:10 -0800 I got a fix for this, will need to clean it up tomorrow and will submit a PR. 2165898 6 zimmermann 2025-12-15 06:31:57 -0800 Pull request: https://github.com/WebKit/WebKit/pull/55405 2165901 7 zimmermann 2025-12-15 06:34:55 -0800 Michael, I'd be glad if you could confirm that this fully fixes the regression for you as well -- the PR is still lacking a test, I'm thinking about a proper way to capture the problem in a layout test.. 2166977 8 ews-feeder 2025-12-18 09:24:34 -0800 Committed 304687@main (48db7480703c): <https://commits.webkit.org/304687@main> Reviewed commits have been landed. Closing PR #55405 and removing active labels. 2169670 9 mcatanzaro 2026-01-06 11:27:08 -0800 Confirmed fixed, thank you!