302900 2025-11-20 15:18:37 -0800 When cascading CSS drop-shadow filters with the same color, the first filter is only drawn 2026-03-16 10:36:07 -0700 1 1 1 Unclassified WebKit Layout and Rendering WebKit Nightly Build Unspecified Unspecified RESOLVED FIXED https://bugs.webkit.org/show_bug.cgi?id=303430 https://bugs.webkit.org/show_bug.cgi?id=310021 InRadar P2 Normal --- 1 sabouhallawa mattwoodrow bfulgham simon.fraser webkit-bug-importer zalan oldest_to_newest 2160387 0 477457 sabouhallawa 2025-11-20 15:18:37 -0800 Created attachment 477457 test case Open the attached test case which includes two <div> elements with cascading drop-shadow filters Result: The filter of the first element is drawn incorrectly. The filter of the second element is drawn correctly. Expected: The filters of the two <div> elements are cascaded correctly even if the colors of the drop-shadow filters are the same. 2160388 1 webkit-bug-importer 2025-11-20 15:19:01 -0800 <rdar://problem/165163823> 2160398 2 sabouhallawa 2025-11-20 15:41:42 -0800 This bugs happens only on Apple platforms. It does not happen also if software filters are used instead of using CoreGraphics. This is an issue below WebKit, tracked by Apple internally as rdar://165163823. 2164227 3 mattwoodrow 2025-12-08 15:01:54 -0800 Re-opening for pull request https://github.com/WebKit/WebKit/pull/55061 2164353 4 ews-feeder 2025-12-09 00:10:43 -0800 Committed 304143@main (c887d10d6123): <https://commits.webkit.org/304143@main> Reviewed commits have been landed. Closing PR #55061 and removing active labels. 477457 2025-11-20 15:18:37 -0800 2025-11-20 15:18:37 -0800 test case repeated-drop-shadow.html text/html 628 sabouhallawa PHN0eWxlPgoJLmJveCB7CgkJd2lkdGg6IDIwMHB4OwoJCWhlaWdodDogMjAwcHg7CgkJYmFja2dy b3VuZC1jb2xvcjogZ3JlZW47CgkJcG9zaXRpb246IGFic29sdXRlOwoJfQoJLnNoYWRvdy1ib3R0 b20tbGVmdC1yZWQgewoJCWZpbHRlcjogZHJvcC1zaGFkb3coLTEwcHggMTBweCAwcHggcmVkKSBk cm9wLXNoYWRvdygtMTBweCAxMHB4IDBweCByZWQpIGRyb3Atc2hhZG93KC0xMHB4IDEwcHggMHB4 IHJlZCkgZHJvcC1zaGFkb3coLTEwcHggMTBweCAwcHggcmVkKTsKCX0KCS5zaGFkb3ctYm90dG9t LWxlZnQtY29sb3JzIHsKCQlmaWx0ZXI6IGRyb3Atc2hhZG93KC0xMHB4IDEwcHggMHB4IHJlZCkg ZHJvcC1zaGFkb3coLTEwcHggMTBweCAwcHggYmx1ZSkgZHJvcC1zaGFkb3coLTEwcHggMTBweCAw cHggY3lhbikgZHJvcC1zaGFkb3coLTEwcHggMTBweCAwcHggZ3JheSk7Cjwvc3R5bGU+Cjxib2R5 PgoJPGRpdiBjbGFzcz0ic2hhZG93LWJvdHRvbS1sZWZ0LXJlZCBib3giIHN0eWxlPSJ0b3A6IDEw cHg7IGxlZnQ6IDUwcHg7Ij48L2Rpdj4KCTxkaXYgY2xhc3M9InNoYWRvdy1ib3R0b20tbGVmdC1j b2xvcnMgYm94IiBzdHlsZT0idG9wOiAxMHB4OyBsZWZ0OiAzNTBweDsiPjwvZGl2Pgo8L2JvZHk+ Cg==