Bug 176830

Summary: Combining `mix-blend-mode` and `-webkit-backdrop-filter` leads to unexpected results
Product: WebKit Reporter: eelco
Component: Layout and RenderingAssignee: Matt Woodrow <mattwoodrow>
Status: RESOLVED FIXED    
Severity: Normal CC: bfulgham, commit-queue, jonlee, simon.fraser, thisiskatewinslet, webkit-bug-importer, zalan
Priority: P2 Keywords: InRadar
Version: Safari Technology Preview   
Hardware: Unspecified   
OS: Unspecified   
Bug Depends on: 261708, 267438    
Bug Blocks:    
Attachments:
Description Flags
Example to reproduce the bugs. none

eelco
Reported 2017-09-13 03:26:53 PDT
Created attachment 320632 [details] Example to reproduce the bugs. See attachment for a demo. There are 9 possible states I found, 4 of them are correct, the rest is broken (there are multiple broken states for the same combinations, depending on order). 1. After loading: broken: blend mode works, blur works for border, but square is covered 2. Click Disable Blend: correct! only blur (blur on, blend off) 3. Click Enable Blend, Disable Blur: broken: blend mode is also disabled 4. Click Enable Blur: broken: blend mode still disabled 5. Click Disable Blur, Disable Blend, Enable Blend: correct! only blend mode 6. Click Enable Blur: correct! both blend mode and blur 7. Click Disable Blend: broken: blend mode not removed 8. Click Enable Blend: broken: double invert plus square covering blur 9. Click Disable Blend, Disable Blur: correct! (no effects)
Attachments
Example to reproduce the bugs. (1.01 KB, text/html)
2017-09-13 03:26 PDT, eelco 		no flags
Details
View All Add attachment proposed patch, testcase, etc.
Radar WebKit Bug Importer
Comment 1 2017-09-15 16:09:44 PDT
<rdar://problem/34470317>
Matt Woodrow
Comment 3 2023-09-21 14:59:26 PDT
Pull request: https://github.com/WebKit/WebKit/pull/18044
EWS
Comment 4 2023-09-25 19:05:41 PDT
Committed 268426@main (ad353604370c): <https://commits.webkit.org/268426@main> Reviewed commits have been landed. Closing PR #18044 and removing active labels.
WebKit Commit Bot
Comment 5 2024-01-11 17:23:32 PST
Re-opened since this is blocked by bug 267438
Matt Woodrow
Comment 6 2024-01-15 19:08:53 PST
Pull request: https://github.com/WebKit/WebKit/pull/22804
EWS
Comment 7 2024-03-20 16:35:00 PDT
Committed 276430@main (72a54445957d): <https://commits.webkit.org/276430@main> Reviewed commits have been landed. Closing PR #22804 and removing active labels.
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