Bug 304911

Summary: SVG filter referencing element with huge stroke fails to display
Product: WebKit Reporter: Simon Fraser (smfr) <simon.fraser>
Component: SVGAssignee: Simon Fraser (smfr) <simon.fraser>
Status: RESOLVED FIXED    
Severity: Normal CC: ana.tudor.lhnh, sabouhallawa, simon.fraser, webkit-bug-importer, zimmermann
Priority: P2 Keywords: InRadar
Version: WebKit Nightly Build   
Hardware: Unspecified   
OS: Unspecified   
See Also: https://github.com/web-platform-tests/wpt/pull/59111
Attachments:
Description Flags
Test none

Simon Fraser (smfr)
Reported 2026-01-04 11:42:44 PST
Created attachment 477899 [details] Test The attachment shows a bug where a filter referencing an SVG element with a huge stroke fails to display. The same SVG stand-alone displays fine. Works: ``` <line x1="-50%" x2="150%" transform="rotate(45)" stroke="blue" stroke-width="300%" stroke-dasharray="15%"></line> ``` Fails: ``` <line x1="-50%" x2="150%" transform="rotate(45)" stroke="blue" stroke-width="100%" stroke-dasharray="15%"></line> ``` Even when the blue dashes show, the red rectangle has the wrong size.
Attachments
Test (1.52 KB, text/html)
2026-01-04 11:42 PST, Simon Fraser (smfr) 		no flags
Details
View All Add attachment proposed patch, testcase, etc.
Simon Fraser (smfr)
Comment 1 2026-01-04 12:02:19 PST
This happens because the input image to the `<feImage>` becomes huge, and we start scaling down incorrectly.
Radar WebKit Bug Importer
Comment 2 2026-01-04 12:02:36 PST
<rdar://problem/167516452>
Simon Fraser (smfr)
Comment 3 2026-01-05 11:34:01 PST
Pull request: https://github.com/WebKit/WebKit/pull/56096
EWS
Comment 4 2026-01-05 17:48:04 PST
Committed 305136@main (c08dafc2c51a): <https://commits.webkit.org/305136@main> Reviewed commits have been landed. Closing PR #56096 and removing active labels.
Ahmad Saleem
Comment 5 2026-04-10 13:03:11 PDT
Submitted web-platform-tests pull request: https://github.com/web-platform-tests/wpt/pull/59111
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