RESOLVED FIXED299270
REGRESSION (296827@main): Opacity/filter render incorrectly 
https://bugs.webkit.org/show_bug.cgi?id=299270
Summary REGRESSION (296827@main): Opacity/filter render incorrectly
Nathan Manceaux-Panot
Reported 2025-09-21 23:37:29 PDT
Created attachment 476819 [details] Before/after screenshots On iOS 26, an picture with opacity and filter CSS properties renders incorrectly (opacity is not applied, only grayscale filter), whereas it rendered correctly on iOS 18. You can see the glitch on https://retcon.app/ . The logo in the top left corner should be slightly dimmed, instead of fully contrasted. (also see attached before/after screenshots)
Attachments
Before/after screenshots (2.71 MB, application/zip)
2025-09-21 23:37 PDT, Nathan Manceaux-Panot 		no flags
Details
Testcase (762 bytes, text/html)
2025-09-23 11:32 PDT, Simon Fraser (smfr) 		no flags
Details
View All Add attachment proposed patch, testcase, etc.
Radar WebKit Bug Importer
Comment 1 2025-09-22 16:43:52 PDT
<rdar://problem/161130683>
Simon Fraser (smfr)
Comment 2 2025-09-23 11:32:29 PDT
Created attachment 476840 [details] Testcase
Simon Fraser (smfr)
Comment 3 2025-09-23 13:38:02 PDT
This regressed at https://commits.webkit.org/296827@main
Matt Woodrow
Comment 4 2025-09-23 19:39:52 PDT
Pull request: https://github.com/WebKit/WebKit/pull/51232
EWS
Comment 5 2025-09-25 21:07:11 PDT
Committed 300549@main (f06618676171): <https://commits.webkit.org/300549@main> Reviewed commits have been landed. Closing PR #51232 and removing active labels.
EWS
Comment 6 2025-09-30 23:25:24 PDT
Committed 297297.495@safari-7622-branch (fc2ae3837566): <https://commits.webkit.org/297297.495@safari-7622-branch> Reviewed commits have been landed. Closing PR #3737 and removing active labels.
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