Bug 294571

Summary: Make subpixel-positioned iframes paint and hit-test correctly
Product: WebKit Reporter: Simon Fraser (smfr) <simon.fraser>
Component: Layout and RenderingAssignee: Simon Fraser (smfr) <simon.fraser>
Status: RESOLVED FIXED    
Severity: Normal CC: ahmad.saleem792, bfulgham, simon.fraser, webkit-bug-importer, zalan
Priority: P2 Keywords: InRadar
Version: WebKit Nightly Build   
Hardware: Unspecified   
OS: Unspecified   
See Also: https://bugs.webkit.org/show_bug.cgi?id=294570
Bug Depends on:    
Bug Blocks: 132000    

Simon Fraser (smfr)
Reported 2025-06-16 11:19:10 PDT
Currently you can get pixel gaps with subpixel-positioned iframes, because we snap their painting coordinates to integral units.
Attachments
Radar WebKit Bug Importer
Comment 1 2025-06-16 11:33:38 PDT
Simon Fraser (smfr)
Comment 2 2025-06-16 11:37:22 PDT
Simon Fraser (smfr)
Comment 3 2025-06-16 11:42:45 PDT
Ahmad Saleem
Comment 4 2025-06-16 23:13:41 PDT
*** Bug 284698 has been marked as a duplicate of this bug. ***
EWS
Comment 5 2025-06-18 17:47:00 PDT
Committed 296407@main (79b2e213326c): <https://commits.webkit.org/296407@main> Reviewed commits have been landed. Closing PR #46816 and removing active labels.
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