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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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12
Tests/LibWeb/Layout/expected/grid/minmax-with-max-function-inside.txt
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@ -2,22 +2,22 @@ Viewport <#document> at (0,0) content-size 800x600 children: not-inline
BlockContainer <html> at (0,0) content-size 800x600 [BFC] children: not-inline
BlockContainer <body> at (8,8) content-size 784x34.9375 children: not-inline
Box <div.grid> at (8,8) content-size 784x34.9375 [GFC] children: not-inline
BlockContainer <div> at (8,8) content-size 261.333333x17.46875 [BFC] children: inline
BlockContainer <div> at (8,8) content-size 261.328125x17.46875 [BFC] children: inline
line 0 width: 9.34375, height: 17.46875, bottom: 17.46875, baseline: 13.53125
frag 0 from TextNode start: 0, length: 1, rect: [8,8 9.34375x17.46875]
"a"
TextNode <#text>
BlockContainer <div> at (269.333333,8) content-size 261.333333x17.46875 [BFC] children: inline
BlockContainer <div> at (269.328125,8) content-size 261.328125x17.46875 [BFC] children: inline
line 0 width: 9.46875, height: 17.46875, bottom: 17.46875, baseline: 13.53125
frag 0 from TextNode start: 0, length: 1, rect: [269.333333,8 9.46875x17.46875]
frag 0 from TextNode start: 0, length: 1, rect: [269.328125,8 9.46875x17.46875]
"b"
TextNode <#text>
BlockContainer <div> at (530.666666,8) content-size 261.333333x17.46875 [BFC] children: inline
BlockContainer <div> at (530.65625,8) content-size 261.328125x17.46875 [BFC] children: inline
line 0 width: 8.890625, height: 17.46875, bottom: 17.46875, baseline: 13.53125
frag 0 from TextNode start: 0, length: 1, rect: [530.666666,8 8.890625x17.46875]
frag 0 from TextNode start: 0, length: 1, rect: [530.65625,8 8.890625x17.46875]
"c"
TextNode <#text>
BlockContainer <div> at (8,25.46875) content-size 261.333333x17.46875 [BFC] children: inline
BlockContainer <div> at (8,25.46875) content-size 261.328125x17.46875 [BFC] children: inline
line 0 width: 7.859375, height: 17.46875, bottom: 17.46875, baseline: 13.53125
frag 0 from TextNode start: 0, length: 1, rect: [8,25.46875 7.859375x17.46875]
"d"