Bug 247961

Summary: filter:blur on an absolutely positioned image loses overflow:hidden
Product: WebKit Reporter: Ahmad Saleem <ahmad.saleem792>
Component: Layout and RenderingAssignee: Nobody <webkit-unassigned>
Status: RESOLVED FIXED    
Severity: Normal CC: bfulgham, simon.fraser, webkit-bug-importer, zalan
Priority: P2 Keywords: InRadar
Version: Safari Technology Preview   
Hardware: Unspecified   
OS: Unspecified   
See Also: https://bugs.webkit.org/show_bug.cgi?id=118411

Description Ahmad Saleem 2022-11-15 14:47:41 PST 
Hi Team,

Another bug and testcase, which we are failing:

Link - https://jsfiddle.net/gbarnett/wxbaw/

It works better in Safari Tech Preview 157 but does not do any transition and both Chrome Canary 110 and Firefox Nightly 109 do and also STP 157 also has second phase of blurring kind of like trying to do more blur in this case.

I am creating this bug to merge following commit:

Blink Commit - https://src.chromium.org/viewvc/blink?view=revision&revision=180361

Webkit GitHub Source - https://github.com/WebKit/WebKit/blob/5730d5c8fb455166bc00aaaef3689b3d07dcdc34/Source/WebCore/rendering/RenderLayer.cpp#L3266 & https://github.com/WebKit/WebKit/blob/5730d5c8fb455166bc00aaaef3689b3d07dcdc34/Source/WebCore/rendering/RenderLayer.cpp#L3292

Note - the attached test case with the change does not reflect any by default but it is broken when blur is added even in STP157:

Link - https://jsfiddle.net/cwgLm1e3/

Just creating bug.

Thanks!
Comment 1 EWS 2022-11-18 01:19:49 PST 
Committed 256825@main (3894c75f5f9f): <https://commits.webkit.org/256825@main>

Reviewed commits have been landed. Closing PR #6531 and removing active labels.
Comment 2 Radar WebKit Bug Importer 2022-11-18 01:20:18 PST 
<rdar://problem/102506142>