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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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8
Tests/LibWeb/Layout/expected/css-font-size-calc.txt
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@ -1,7 +1,7 @@
Viewport <#document> at (0,0) content-size 800x600 children: not-inline
BlockContainer <html> at (0,0) content-size 800x125.179687 [BFC] children: not-inline
BlockContainer <body> at (8,8) content-size 784x109.179687 children: inline
line 0 width: 644.628906, height: 109.179687, bottom: 109.179687, baseline: 84.570312
frag 0 from TextNode start: 0, length: 13, rect: [8,8 644.628906x109.179687]
BlockContainer <html> at (0,0) content-size 800x125.171875 [BFC] children: not-inline
BlockContainer <body> at (8,8) content-size 784x109.171875 children: inline
line 0 width: 644.609375, height: 109.171875, bottom: 109.171875, baseline: 84.546875
frag 0 from TextNode start: 0, length: 13, rect: [8,8 644.609375x109.171875]
"Hello friends"
TextNode <#text>