[Webkit-unassigned] [Bug 204885] [LFC][IFC] Many render tree dump tests show 1px too narrow runs
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bugzilla-daemon at webkit.org
Thu Dec 5 06:43:29 PST 2019
https://bugs.webkit.org/show_bug.cgi?id=204885
zalan <zalan at apple.com> changed:
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--- Comment #2 from zalan <zalan at apple.com> ---
Comment on attachment 384899
--> https://bugs.webkit.org/attachment.cgi?id=384899
patch
View in context: https://bugs.webkit.org/attachment.cgi?id=384899&action=review
> Source/WebCore/layout/inlineformatting/text/TextUtil.cpp:74
> + return std::max(0_lu, LayoutUnit::fromFloatRound(width));
Please add a some words here so that it's clear why we do this random (and presumably temporary) rounding. So I guess the reason why SLL uses float everywhere is to match ComplexLineLayout results. This is very unfortunate and probably fails over time with accumulated rounding. I wish we could essentiallyEqual the layout tests the same way LayoutContext::verifyAndOutputMismatchingLayoutTree does. :(
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