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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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10
Tests/LibWeb/Layout/expected/flex-column-height-constrained-width-constrained.txt
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@ -4,23 +4,23 @@ Viewport <#document> at (0,0) content-size 800x600 children: not-inline
Box <div.container.column> at (9,9) content-size 250x250 flex-container(column) [FFC] children: not-inline
BlockContainer <(anonymous)> (not painted) [BFC] children: inline
TextNode <#text>
BlockContainer <div.box> at (10,10) content-size 100x81.333333 flex-item [BFC] children: inline
BlockContainer <div.box> at (10,10) content-size 100x81.34375 flex-item [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: [10,10 6.34375x17.46875]
"1"
TextNode <#text>
BlockContainer <(anonymous)> (not painted) [BFC] children: inline
TextNode <#text>
BlockContainer <div.box> at (10,93.333333) content-size 100x81.333333 flex-item [BFC] children: inline
BlockContainer <div.box> at (10,93.34375) content-size 100x81.34375 flex-item [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: [10,93.333333 8.8125x17.46875]
frag 0 from TextNode start: 0, length: 1, rect: [10,93.34375 8.8125x17.46875]
"2"
TextNode <#text>
BlockContainer <(anonymous)> (not painted) [BFC] children: inline
TextNode <#text>
BlockContainer <div.box> at (10,176.666666) content-size 100x81.333333 flex-item [BFC] children: inline
BlockContainer <div.box> at (10,176.6875) content-size 100x81.34375 flex-item [BFC] children: inline
line 0 width: 9.09375, height: 17.46875, bottom: 17.46875, baseline: 13.53125
frag 0 from TextNode start: 0, length: 1, rect: [10,176.666666 9.09375x17.46875]
frag 0 from TextNode start: 0, length: 1, rect: [10,176.6875 9.09375x17.46875]
"3"
TextNode <#text>
BlockContainer <(anonymous)> (not painted) [BFC] children: inline