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LibWeb: Make CSSPixels and Length use 64-bit (double) floating point

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This fixes a plethora of rounding problems on many websites.
In the future, we may want to replace this with fixed-point arithmetic
(bug #18566) for performance (and consistency with other engines),
but in the meantime this makes the web look a bit better. :^)

There's a lot more things that could be converted to doubles, which
would reduce the amount of casting necessary in this patch.
We can do that incrementally, however.
This commit is contained in:
Andreas Kling 2023-05-24 10:50:57 +02:00
parent 30262d7023
commit 655d9d1462
80 changed files with 298 additions and 299 deletions
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10
Tests/LibWeb/Layout/expected/flex-shrink-2.txt
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@ -4,23 +4,23 @@ Viewport <#document> at (0,0) content-size 800x600 children: not-inline
Box <div.container> at (9,9) content-size 500x102 flex-container(row) [FFC] children: not-inline
BlockContainer <(anonymous)> at (9,9) content-size 0x0 [BFC] children: inline
TextNode <#text>
BlockContainer <div.box> at (10,10) content-size 47.000030x100 flex-item [BFC] children: inline
BlockContainer <div.box> at (10,10) content-size 47.000011x100 flex-item [BFC] children: inline
line 0 width: 6.34375, height: 17.46875, bottom: 17.46875, baseline: 13.53125
frag 0 from TextNode start: 0, length: 1, rect: [10,10 6.34375x17.46875]
"1"
TextNode <#text>
BlockContainer <(anonymous)> at (9,9) content-size 0x0 [BFC] children: inline
TextNode <#text>
BlockContainer <div.box> at (59.000030,10) content-size 164.666671x100 flex-item [BFC] children: inline
BlockContainer <div.box> at (59.000011,10) content-size 164.666666x100 flex-item [BFC] children: inline
line 0 width: 8.8125, height: 17.46875, bottom: 17.46875, baseline: 13.53125
frag 0 from TextNode start: 0, length: 1, rect: [59.000030,10 8.8125x17.46875]
frag 0 from TextNode start: 0, length: 1, rect: [59.000011,10 8.8125x17.46875]
"2"
TextNode <#text>
BlockContainer <(anonymous)> at (9,9) content-size 0x0 [BFC] children: inline
TextNode <#text>
BlockContainer <div.box> at (225.666702,10) content-size 282.333312x100 flex-item [BFC] children: inline
BlockContainer <div.box> at (225.666678,10) content-size 282.333321x100 flex-item [BFC] children: inline
line 0 width: 9.09375, height: 17.46875, bottom: 17.46875, baseline: 13.53125
frag 0 from TextNode start: 0, length: 1, rect: [225.666702,10 9.09375x17.46875]
frag 0 from TextNode start: 0, length: 1, rect: [225.666678,10 9.09375x17.46875]
"3"
TextNode <#text>
BlockContainer <(anonymous)> at (9,9) content-size 0x0 [BFC] children: inline