Bug 227679

Summary: Fieldset elements can incorrectly get treated as opaque with async scrolling overflow areas enabled
Product: WebKit Reporter: Chris Lord <clord>
Component: Layout and RenderingAssignee: Chris Lord <clord>
Status: RESOLVED FIXED    
Severity: Normal CC: bfulgham, changseok, darin, esprehn+autocc, ews-watchlist, fred.wang, glenn, graouts, kondapallykalyan, pdr, sam, simon.fraser, svillar, webkit-bug-importer, zalan
Priority: P2 Keywords: InRadar
Version: WebKit Nightly Build   
Hardware: Unspecified   
OS: Unspecified   
Bug Depends on:    
Bug Blocks: 224596    
Attachments:
Description Flags
Patch
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Description Chris Lord 2021-07-05 02:23:38 PDT 
imported/w3c/web-platform-tests/html/rendering/non-replaced-elements/the-fieldset-and-legend-elements/fieldset-overflow.html is failing because the 'actual' result image has a transparent area that should be opaque white (it otherwise matches the expected image). I assume this is happening because the fieldset area that overlaps this transparent area is being treated as an opaque rectangle, when its actual opaque area is determined by its children. This bug almost certainly isn't WPE-specific, but only WPE has async overflow scrolling enabled for all tests.
Comment 1 Chris Lord 2021-07-06 08:30:07 PDT 
Created attachment 432935 [details]
Patch
Comment 2 Chris Lord 2021-07-06 08:33:22 PDT 
Created attachment 432936 [details]
Patch
Comment 3 Chris Lord 2021-07-06 08:35:44 PDT 
Created attachment 432937 [details]
Patch
Comment 4 EWS 2021-07-07 01:12:32 PDT 
Committed r279640 (239454@main): <https://commits.webkit.org/239454@main>

All reviewed patches have been landed. Closing bug and clearing flags on attachment 432937 [details].
Comment 5 Radar WebKit Bug Importer 2021-07-07 01:13:18 PDT 
<rdar://problem/80254981>