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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/flex/calc-flex-basis.txt
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@ -3,22 +3,22 @@ Viewport <#document> at (0,0) content-size 800x600 children: not-inline
BlockContainer <body> at (10,10) content-size 780x62 children: not-inline
Box <div.flex-container> at (11,11) content-size 778x60 flex-container(row) [FFC] children: not-inline
BlockContainer <div.flex-item> at (12,12) content-size 386x28 flex-item [BFC] children: inline
line 0 width: 58.398437, height: 21.835937, bottom: 21.835937, baseline: 16.914062
frag 0 from TextNode start: 0, length: 6, rect: [12,12 58.398437x21.835937]
line 0 width: 58.390625, height: 21.828125, bottom: 21.828125, baseline: 16.890625
frag 0 from TextNode start: 0, length: 6, rect: [12,12 58.390625x21.828125]
"Item 1"
TextNode <#text>
BlockContainer <div.flex-item> at (401,12) content-size 386x28 flex-item [BFC] children: inline
line 0 width: 61.484375, height: 21.835937, bottom: 21.835937, baseline: 16.914062
frag 0 from TextNode start: 0, length: 6, rect: [401,12 61.484375x21.835937]
line 0 width: 61.484375, height: 21.828125, bottom: 21.828125, baseline: 16.890625
frag 0 from TextNode start: 0, length: 6, rect: [401,12 61.484375x21.828125]
"Item 2"
TextNode <#text>
BlockContainer <div.flex-item> at (12,42) content-size 386x28 flex-item [BFC] children: inline
line 0 width: 61.835937, height: 21.835937, bottom: 21.835937, baseline: 16.914062
frag 0 from TextNode start: 0, length: 6, rect: [12,42 61.835937x21.835937]
line 0 width: 61.828125, height: 21.828125, bottom: 21.828125, baseline: 16.890625
frag 0 from TextNode start: 0, length: 6, rect: [12,42 61.828125x21.828125]
"Item 3"
TextNode <#text>
BlockContainer <div.flex-item> at (401,42) content-size 386x28 flex-item [BFC] children: inline
line 0 width: 60.15625, height: 21.835937, bottom: 21.835937, baseline: 16.914062
frag 0 from TextNode start: 0, length: 6, rect: [401,42 60.15625x21.835937]
line 0 width: 60.15625, height: 21.828125, bottom: 21.828125, baseline: 16.890625
frag 0 from TextNode start: 0, length: 6, rect: [401,42 60.15625x21.828125]
"Item 4"
TextNode <#text>