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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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16
Tests/LibWeb/Layout/expected/grid/item-column-span-2.txt
View file

@ -1,21 +1,21 @@
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 784x35.40625 children: not-inline
Box <div.container> at (8,8) content-size 784x35.40625 [GFC] children: not-inline
BlockContainer <body> at (8,8) content-size 784x34.9375 children: not-inline
Box <div.container> at (8,8) content-size 784x34.9375 [GFC] children: not-inline
BlockContainer <(anonymous)> (not painted) [BFC] children: inline
TextNode <#text>
BlockContainer <div.item-left> at (8,8) content-size 100x35.40625 [BFC] children: not-inline
BlockContainer <div.item-left> at (8,8) content-size 100x34.9375 [BFC] children: not-inline
BlockContainer <(anonymous)> (not painted) [BFC] children: inline
TextNode <#text>
BlockContainer <div.item-right> at (108,8) content-size 683.999999x35.40625 [BFC] children: inline
BlockContainer <div.item-right> at (108.03125,8) content-size 683.96875x34.9375 [BFC] children: inline
line 0 width: 625.953125, height: 17.46875, bottom: 17.46875, baseline: 13.53125
frag 0 from TextNode start: 0, length: 77, rect: [108,8 625.953125x17.46875]
frag 0 from TextNode start: 0, length: 77, rect: [108.03125,8 625.953125x17.46875]
"Lorem ipsum dolor sit amet, consectetur adipiscing elit. Ut iaculis venenatis"
line 1 width: 304.0625, height: 17.9375, bottom: 35.40625, baseline: 13.53125
frag 0 from TextNode start: 78, length: 39, rect: [108,25 304.0625x17.46875]
line 1 width: 304.0625, height: 17.46875, bottom: 34.9375, baseline: 13.53125
frag 0 from TextNode start: 78, length: 39, rect: [108.03125,25.46875 304.0625x17.46875]
"purus, eget blandit velit venenatis at."
TextNode <#text>
BlockContainer <(anonymous)> (not painted) [BFC] children: inline
TextNode <#text>
BlockContainer <(anonymous)> at (8,43.40625) content-size 784x0 children: inline
BlockContainer <(anonymous)> at (8,42.9375) content-size 784x0 children: inline
TextNode <#text>