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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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6
Tests/LibWeb/Layout/expected/grid/borders.txt
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@ -103,14 +103,14 @@ Viewport <#document> at (0,0) content-size 800x600 children: not-inline
Box <div.grid-container> at (8,275.34375) content-size 784x90.9375 [GFC] children: not-inline
BlockContainer <(anonymous)> (not painted) [BFC] children: inline
TextNode <#text>
BlockContainer <div.grid-item> at (444.2,285.34375) content-size 337.8x17.46875 [BFC] children: inline
BlockContainer <div.grid-item> at (444.1875,285.34375) content-size 337.796875x17.46875 [BFC] children: inline
line 0 width: 6.34375, height: 17.46875, bottom: 17.46875, baseline: 13.53125
frag 0 from TextNode start: 0, length: 1, rect: [444.2,285.34375 6.34375x17.46875]
frag 0 from TextNode start: 0, length: 1, rect: [444.1875,285.34375 6.34375x17.46875]
"1"
TextNode <#text>
BlockContainer <(anonymous)> (not painted) [BFC] children: inline
TextNode <#text>
BlockContainer <div.grid-item> at (18,338.8125) content-size 337.8x17.46875 [BFC] children: inline
BlockContainer <div.grid-item> at (18,338.8125) content-size 337.796875x17.46875 [BFC] children: inline
line 0 width: 8.8125, height: 17.46875, bottom: 17.46875, baseline: 13.53125
frag 0 from TextNode start: 0, length: 1, rect: [18,338.8125 8.8125x17.46875]
"2"