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LibWeb: Use fixed-point saturated arithmetics for CSSPixels

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Using fixed-point saturated arithmetics for CSSPixels allows to avoid
accumulating floating-point errors.

This implementation is not complete yet: currently saturated
arithmetics implemented only for addition. But it is enough to not
regress any of layout tests we have :)

See https://github.com/SerenityOS/serenity/issues/18566
This commit is contained in:
Aliaksandr Kalenik 2023-07-23 01:09:39 +02:00 • committed by Andreas Kling
parent 5cdd03fc53
commit bec07d4af7
136 changed files with 1938 additions and 1844 deletions
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2
Tests/LibWeb/Layout/expected/block-and-inline/float-stress-1.txt
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@ -40,7 +40,7 @@ Viewport <#document> at (0,0) content-size 800x600 children: not-inline
line 11 width: 239.203125, height: 16, bottom: 180, baseline: 12.796875
frag 0 from TextNode start: 57, length: 16, rect: [61,173 141.203125x16]
"baz foo bar baz "
frag 1 from TextNode start: 1, length: 11, rect: [202,173 98x16]
frag 1 from TextNode start: 1, length: 11, rect: [202.203125,173 98x16]
"foo bar baz"
line 12 width: 204, height: 16, bottom: 196, baseline: 12.796875
frag 0 from TextNode start: 13, length: 12, rect: [61,189 106x16]