Bug 219520

Summary: overflow:hidden should not clip filter: drop-shadow()
Product: WebKit Reporter: Simon Fraser (smfr) <simon.fraser>
Component: Layout and RenderingAssignee: Matt Woodrow <mattwoodrow>
Status: RESOLVED FIXED    
Severity: Normal CC: bfulgham, bramus, sabouhallawa, simon.fraser, stearns, webkit-bug-importer, zalan, znaykaznaykovich
Priority: P2 Keywords: InRadar
Version: Safari Technology Preview   
Hardware: Unspecified   
OS: Unspecified   
See Also: https://bugs.webkit.org/show_bug.cgi?id=305032
Attachments:
Description Flags
Testcase
none
Another test none

Simon Fraser (smfr)
Reported 2020-12-03 17:44:22 PST
Overflow:hidden is clipping the drop-shadow filter, and should not.
Attachments
Testcase (856 bytes, text/html)
2020-12-03 17:44 PST, Simon Fraser (smfr) 		no flags
Details
Another test (491 bytes, text/html)
2025-06-05 16:40 PDT, Simon Fraser (smfr) 		no flags
Details
View All Add attachment proposed patch, testcase, etc.
Simon Fraser (smfr)
Comment 1 2020-12-03 17:44:45 PST
Created attachment 415369 [details] Testcase
Radar WebKit Bug Importer
Comment 2 2020-12-10 17:45:36 PST
<rdar://problem/72205047>
Simon Fraser (smfr)
Comment 3 2023-10-26 15:43:31 PDT
*** Bug 263741 has been marked as a duplicate of this bug. ***
Simon Fraser (smfr)
Comment 4 2025-06-05 16:37:57 PDT
*** Bug 285872 has been marked as a duplicate of this bug. ***
Simon Fraser (smfr)
Comment 5 2025-06-05 16:40:52 PDT
Created attachment 475491 [details] Another test
Simon Fraser (smfr)
Comment 6 2025-06-05 16:48:14 PDT
Actually I'm not sure we're wrong here. https://drafts.fxtf.org/filter-effects/#FilterProperty says: "The compositing model follows the SVG compositing model [SVG11]: first any filter effect is applied, then any clipping, masking and opacity. As per SVG, the application of filter has no effect on hit-testing."
Simon Fraser (smfr)
Comment 7 2025-06-05 17:09:41 PDT
I filed https://github.com/w3c/csswg-drafts/issues/12291
Matt Woodrow
Comment 8 2025-06-05 20:34:39 PDT
Pull request: https://github.com/WebKit/WebKit/pull/46344
EWS
Comment 9 2025-06-30 18:02:18 PDT
Committed 296844@main (c9651d6e97ae): <https://commits.webkit.org/296844@main> Reviewed commits have been landed. Closing PR #46344 and removing active labels.
Simon Fraser (smfr)
Comment 10 2025-08-05 18:33:21 PDT
*** Bug 296800 has been marked as a duplicate of this bug. ***
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