Bug 188486

Summary: CSS reference filter with feDisplacementMap shows buffer corruption on Retina displays
Product: WebKit Reporter: Simon Fraser (smfr) <simon.fraser>
Component: SVGAssignee: Simon Fraser (smfr) <simon.fraser>
Status: RESOLVED FIXED    
Severity: Normal CC: commit-queue, dino, ews-watchlist, kondapallykalyan, mmaxfield, sabouhallawa, simon.fraser, webkit-bug-importer, zimmermann
Priority: P2 Keywords: InRadar
Version: WebKit Nightly Build   
Hardware: Unspecified   
OS: Unspecified   
Attachments:
Description Flags
Screenshot
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Testcase
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Patch none

Description Simon Fraser (smfr) 2018-08-11 17:35:59 PDT 
https://codepen.io/yoksel/pen/VBVRWa

Looks very wrong on Mac and iOS.
Comment 1 Simon Fraser (smfr) 2018-08-11 17:37:03 PDT 
Created attachment 346974 [details]
Screenshot
Comment 2 Radar WebKit Bug Importer 2018-08-11 17:37:25 PDT 
<rdar://problem/43189750>
Comment 3 Simon Fraser (smfr) 2018-09-19 16:53:36 PDT 
Only happens on Retina displays.
Comment 4 Simon Fraser (smfr) 2018-09-23 11:24:33 PDT 
Created attachment 350576 [details]
Testcase

I think this is mostly about feDisplacementMap
Comment 5 Simon Fraser (smfr) 2018-09-23 11:44:29 PDT 
Created attachment 350577 [details]
Patch
Comment 6 WebKit Commit Bot 2018-09-24 11:20:33 PDT 
Comment on attachment 350577 [details]
Patch

Clearing flags on attachment: 350577

Committed r236415: <https://trac.webkit.org/changeset/236415>
Comment 7 WebKit Commit Bot 2018-09-24 11:20:34 PDT 
All reviewed patches have been landed.  Closing bug.