Bug 227594

Summary: [Legacy line layout] Inline content on subpixel position makes the table cell scroll
Product: WebKit Reporter: zalan <zalan>
Component: Layout and RenderingAssignee: zalan <zalan>
Status: RESOLVED FIXED    
Severity: Normal CC: bfulgham, changseok, eric.carlson, esprehn+autocc, ews-watchlist, glenn, jbedard, jer.noble, kondapallykalyan, mmaxfield, pdr, philipj, sergio, simon.fraser, zalan
Priority: P2 Keywords: InRadar
Version: WebKit Nightly Build   
Hardware: Unspecified   
OS: Unspecified   
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Description zalan 2021-07-01 13:34:06 PDT 
<rdar://74884402>
Comment 1 zalan 2021-07-01 13:42:17 PDT 
Created attachment 432721 [details]
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Comment 2 zalan 2021-07-01 13:46:02 PDT 
Created attachment 432722 [details]
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Comment 3 zalan 2021-07-01 18:20:00 PDT 
Created attachment 432761 [details]
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Comment 4 zalan 2021-07-02 12:43:35 PDT 
Created attachment 432812 [details]
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Comment 5 zalan 2021-07-06 16:38:58 PDT 
Created attachment 432987 [details]
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Comment 6 zalan 2021-07-06 16:55:12 PDT 
Created attachment 432989 [details]
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Comment 7 zalan 2021-07-06 18:57:18 PDT 
Created attachment 432997 [details]
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Comment 8 zalan 2021-07-06 21:08:40 PDT 
Created attachment 433006 [details]
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Comment 9 zalan 2021-07-07 06:41:08 PDT 
Created attachment 433024 [details]
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Comment 10 Simon Fraser (smfr) 2021-07-07 08:53:08 PDT 
Comment on attachment 433024 [details]
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View in context: https://bugs.webkit.org/attachment.cgi?id=433024&action=review

> Source/WebCore/rendering/LegacyInlineFlowBox.cpp:659
> +        // FIXME: Let's do device pixel snapping at paint time instead.

Can you reference a bugzilla bug in the comment? The "Let's do" makes it hard to judge how important this is; it should be more like "we should not do integral rounding here".

> Source/WebCore/rendering/LegacyInlineFlowBox.cpp:771
>      if (isRootBox) {

Sucks how there's if (isRootBox) logic way up at the start of this function, and here. Would be nice to factor the middle part into separate function.
Comment 11 zalan 2021-07-07 11:19:02 PDT 
Created attachment 433050 [details]
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Comment 12 EWS 2021-07-07 14:35:27 PDT 
Committed r279673 (239480@main): <https://commits.webkit.org/239480@main>

All reviewed patches have been landed. Closing bug and clearing flags on attachment 433050 [details].