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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/block-and-inline/inline-box-positioned-with-top-left.txt
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@ -4,13 +4,13 @@ Viewport <#document> at (0,0) content-size 800x600 children: not-inline
line 0 width: 352.34375, height: 20, bottom: 20, baseline: 13.53125
frag 0 from TextNode start: 0, length: 14, rect: [8,8 112.421875x17.46875]
"text text text"
frag 1 from BlockContainer start: 0, length: 0, rect: [120,8 110.375x20]
frag 2 from TextNode start: 0, length: 16, rect: [231,8 129.546875x17.46875]
frag 1 from BlockContainer start: 0, length: 0, rect: [120.421875,8 110.375x20]
frag 2 from TextNode start: 0, length: 16, rect: [230.796875,8 129.546875x17.46875]
"more inline text"
TextNode <#text>
BlockContainer <span.displaced_text> at (150,48) content-size 110.375x20 positioned inline-block [BFC] children: inline
BlockContainer <span.displaced_text> at (150.421875,48) content-size 110.375x20 positioned inline-block [BFC] children: inline
line 0 width: 110.375, height: 17.46875, bottom: 17.46875, baseline: 13.53125
frag 0 from TextNode start: 0, length: 14, rect: [150,48 110.375x17.46875]
frag 0 from TextNode start: 0, length: 14, rect: [150.421875,48 110.375x17.46875]
"displaced text"
TextNode <#text>
TextNode <#text>