diff options
Diffstat (limited to 'src/functions/colors')
-rw-r--r-- | src/functions/colors/_apca.scss | 127 | ||||
-rw-r--r-- | src/functions/colors/_index.scss | 2 | ||||
-rw-r--r-- | src/functions/colors/_oklch.scss | 88 |
3 files changed, 217 insertions, 0 deletions
diff --git a/src/functions/colors/_apca.scss b/src/functions/colors/_apca.scss new file mode 100644 index 0000000..d9236b2 --- /dev/null +++ b/src/functions/colors/_apca.scss | |||
@@ -0,0 +1,127 @@ | |||
1 | /* stylelint-disable scss/dollar-variable-pattern */ | ||
2 | /* stylelint-disable scss/at-function-pattern */ | ||
3 | |||
4 | @use 'sass:color'; | ||
5 | @use 'sass:list'; | ||
6 | @use 'sass:map'; | ||
7 | @use 'sass:math'; | ||
8 | |||
9 | $SA98G: ( | ||
10 | mainTRC: 2.4, | ||
11 | |||
12 | sRco: 0.2126729, | ||
13 | sGco: 0.7151522, | ||
14 | sBco: 0.0721750, | ||
15 | |||
16 | normBG: 0.56, | ||
17 | normTXT: 0.57, | ||
18 | revTXT: 0.62, | ||
19 | revBG: 0.65, | ||
20 | |||
21 | blkThrs: 0.022, | ||
22 | blkClmp: 1.414, | ||
23 | scaleBoW: 1.14, | ||
24 | scaleWoB: 1.14, | ||
25 | loBoWoffset: 0.027, | ||
26 | loWoBoffset: 0.027, | ||
27 | deltaYmin: 0.0005, | ||
28 | loClip: 0.0001, | ||
29 | |||
30 | mFactor: 1.94685544331710, | ||
31 | mOffsetIn: 0.03873938165714010, | ||
32 | mExpAdj: 0.2833433964208690, | ||
33 | mOffsetOut: 0.3128657958707580, | ||
34 | ); | ||
35 | |||
36 | @function apca_sRGB_to_Y($color) { | ||
37 | @return map.get($SA98G, sRco) * math.pow(math.div(color.red($color), 255), map.get($SA98G, mainTRC)) + | ||
38 | map.get($SA98G, sGco) * math.pow(math.div(color.green($color), 255), map.get($SA98G, mainTRC)) + | ||
39 | map.get($SA98G, sBco) * math.pow(math.div(color.blue($color), 255), map.get($SA98G, mainTRC)); | ||
40 | } | ||
41 | |||
42 | @function apca_Y_to_sRGB($y) { | ||
43 | $c: math.round(math.pow($y, math.div(1, map.get($SA98G, mainTRC))) * 255); | ||
44 | @return rgb($c, $c, $c); | ||
45 | } | ||
46 | |||
47 | @function apcaContrast($txtY, $bgY) { | ||
48 | $icp: 0.0 1.1; | ||
49 | |||
50 | @if math.min($txtY, $bgY) < list.nth($icp, 1) or math.max($txtY, $bgY) > list.nth($icp, 2) { | ||
51 | @return 0; | ||
52 | } | ||
53 | |||
54 | @if $txtY <= map.get($SA98G, blkThrs) { | ||
55 | $txtY: $txtY + math.pow(map.get($SA98G, blkThrs) - $txtY, map.get($SA98G, blkClmp)); | ||
56 | } | ||
57 | @if $bgY <= map.get($SA98G, blkThrs) { | ||
58 | $bgY: $bgY + math.pow(map.get($SA98G, blkThrs) - $bgY, map.get($SA98G, blkClmp)); | ||
59 | } | ||
60 | |||
61 | @if math.abs($bgY - $txtY) < map.get($SA98G, deltaYmin) { | ||
62 | @return 0; | ||
63 | } | ||
64 | |||
65 | $outputContrast: 0; | ||
66 | |||
67 | @if $bgY > $txtY { | ||
68 | $SAPC: map.get($SA98G, scaleBoW) * (math.pow($bgY, map.get($SA98G, normBG)) - math.pow($txtY, map.get($SA98G, normTXT))); | ||
69 | |||
70 | @if $SAPC >= map.get($SA98G, loClip) { | ||
71 | $outputContrast: $SAPC - map.get($SA98G, loBoWoffset); | ||
72 | } | ||
73 | } @else { | ||
74 | $SAPC: map.get($SA98G, scaleWoB) * (math.pow($bgY, map.get($SA98G, revBG)) - math.pow($txtY, map.get($SA98G, revTXT))); | ||
75 | |||
76 | @if $SAPC <= -1 * map.get($SA98G, loClip) { | ||
77 | $outputContrast: $SAPC + map.get($SA98G, loWoBoffset); | ||
78 | } | ||
79 | } | ||
80 | |||
81 | @return $outputContrast * 100.0; | ||
82 | } | ||
83 | |||
84 | @function apcaReverse($contrast, $knownY, $knownType: 'bg') { | ||
85 | $unknownY: $knownY; | ||
86 | |||
87 | $knownExp: 0; | ||
88 | $unknownExp: 0; | ||
89 | |||
90 | $scale: map.get($SA98G, if($contrast > 0, scaleBoW, scaleWoB)); | ||
91 | $offset: map.get($SA98G, if($contrast > 0, loBoWoffset, loWoBoffset)); | ||
92 | |||
93 | $contrast: math.div($contrast * 0.01 + $offset, $scale); | ||
94 | |||
95 | @if $knownY <= map.get($SA98G, blkThrs) { | ||
96 | $knownY: $knownY + math.pow(map.get($SA98G, blkThrs) - $knownY, map.get($SA98G, blkClmp)); | ||
97 | } | ||
98 | |||
99 | @if $knownType == 'bg' { | ||
100 | $knownExp: map.get($SA98G, if($contrast > 0, normBG, revBG)); | ||
101 | $unknownExp: map.get($SA98G, if($contrast > 0, normTXT, revTXT)); | ||
102 | $unknownY: math.pow(math.pow($knownY, $knownExp) - $contrast, math.div(1, $unknownExp)); | ||
103 | } @else { | ||
104 | $knownExp: map.get($SA98G, if($contrast > 0, normTXT, revTXT)); | ||
105 | $unknownExp: map.get($SA98G, if($contrast > 0, normBG, revBG)); | ||
106 | $unknownY: math.pow($contrast + math.pow($knownY, $knownExp), math.div(1, $unknownExp)); | ||
107 | } | ||
108 | |||
109 | @if '#{$unknownY}' == '#{math.sqrt(-1)}' { | ||
110 | @return false; | ||
111 | } | ||
112 | |||
113 | @if $unknownY > 1.06 or $unknownY < 0 { | ||
114 | @return false; | ||
115 | } | ||
116 | |||
117 | @if $unknownY <= map.get($SA98G, blkThrs) { | ||
118 | $unknownY: math.pow( | ||
119 | ($unknownY + map.get($SA98G, mOffsetIn)) * map.get($SA98G, mFactor), | ||
120 | math.div(map.get($SA98G, mExpAdj), map.get($SA98G, blkClmp)) | ||
121 | ) * math.div(1, map.get($SA98G, mFactor)) - map.get($SA98G, mOffsetOut); | ||
122 | } | ||
123 | |||
124 | $unknownY: math.max(math.min($unknownY, 1), 0); | ||
125 | |||
126 | @return $unknownY; | ||
127 | } | ||
diff --git a/src/functions/colors/_index.scss b/src/functions/colors/_index.scss new file mode 100644 index 0000000..26c3027 --- /dev/null +++ b/src/functions/colors/_index.scss | |||
@@ -0,0 +1,2 @@ | |||
1 | @forward 'apca'; | ||
2 | @forward 'oklch'; | ||
diff --git a/src/functions/colors/_oklch.scss b/src/functions/colors/_oklch.scss new file mode 100644 index 0000000..e3df041 --- /dev/null +++ b/src/functions/colors/_oklch.scss | |||
@@ -0,0 +1,88 @@ | |||
1 | /* stylelint-disable scss/dollar-variable-pattern */ | ||
2 | /* stylelint-disable scss/at-function-pattern */ | ||
3 | |||
4 | @use 'sass:list'; | ||
5 | @use 'sass:math'; | ||
6 | @use 'sass:meta'; | ||
7 | @use 'sass:string'; | ||
8 | @use '@oddbird/blend/sass/convert' as blend-convert; | ||
9 | @use '@oddbird/blend/sass/utils/pow'; | ||
10 | @use 'iro-sass/src/index' as iro; | ||
11 | |||
12 | @function lin_sRGB_to_Oklab($color) { | ||
13 | $r_: list.nth($color, 1); | ||
14 | $g_: list.nth($color, 2); | ||
15 | $b_: list.nth($color, 3); | ||
16 | |||
17 | $l: pow.cbrt(0.4122214708 * $r_ + 0.5363325363 * $g_ + 0.0514459929 * $b_); | ||
18 | $m: pow.cbrt(0.2119034982 * $r_ + 0.6806995451 * $g_ + 0.1073969566 * $b_); | ||
19 | $s: pow.cbrt(0.0883024619 * $r_ + 0.2817188376 * $g_ + 0.6299787005 * $b_); | ||
20 | |||
21 | @return ( | ||
22 | 0.2104542553 * $l + 0.7936177850 * $m - 0.0040720468 * $s, | ||
23 | 1.9779984951 * $l - 2.4285922050 * $m + 0.4505937099 * $s, | ||
24 | 0.0259040371 * $l + 0.7827717662 * $m - 0.8086757660 * $s, | ||
25 | ); | ||
26 | } | ||
27 | |||
28 | @function Oklab_to_lin_sRGB($color) { | ||
29 | $l_: list.nth($color, 1); | ||
30 | $a_: list.nth($color, 2); | ||
31 | $b_: list.nth($color, 3); | ||
32 | |||
33 | $l: $l_ + 0.3963377774 * $a_ + 0.2158037573 * $b_; | ||
34 | $m: $l_ - 0.1055613458 * $a_ - 0.0638541728 * $b_; | ||
35 | $s: $l_ - 0.0894841775 * $a_ - 1.2914855480 * $b_; | ||
36 | |||
37 | $l: $l * $l * $l; | ||
38 | $m: $m * $m * $m; | ||
39 | $s: $s * $s * $s; | ||
40 | |||
41 | @return ( | ||
42 | 4.0767416621 * $l - 3.3077115913 * $m + 0.2309699292 * $s, | ||
43 | -1.2684380046 * $l + 2.6097574011 * $m - 0.3413193965 * $s, | ||
44 | -0.0041960863 * $l - 0.7034186147 * $m + 1.7076147010 * $s, | ||
45 | ); | ||
46 | } | ||
47 | |||
48 | @function oklch($arg) { | ||
49 | $l: math.div(list.nth($arg, 1), 100%); | ||
50 | $c: list.nth($arg, 2); | ||
51 | $h: list.nth($arg, 3); | ||
52 | |||
53 | @return blend-convert.rgbToSass( | ||
54 | blend-convert.gam_sRGB( | ||
55 | Oklab_to_lin_sRGB( | ||
56 | blend-convert.LCH_to_Lab($l $c $h) | ||
57 | ) | ||
58 | ) | ||
59 | ); | ||
60 | } | ||
61 | |||
62 | @function parse-oklch($color) { | ||
63 | @if meta.type-of($color) == 'color' { | ||
64 | @return blend-convert.Lab_to_LCH( | ||
65 | lin_sRGB_to_Oklab( | ||
66 | blend-convert.lin_sRGB( | ||
67 | blend-convert.sassToRgb($color) | ||
68 | ) | ||
69 | ) | ||
70 | ); | ||
71 | } | ||
72 | |||
73 | @if meta.type-of($color) != 'string' { | ||
74 | @return null; | ||
75 | } | ||
76 | |||
77 | @if string.slice($color, 1, 6) == 'oklch(' { | ||
78 | $args: string.split(string.slice($color, 7, -2), ' '); | ||
79 | |||
80 | $l: math.div(iro.fn-to-number(list.nth($args, 1)), 100%); | ||
81 | $c: iro.fn-to-number(list.nth($args, 2)); | ||
82 | $h: iro.fn-to-number(list.nth($args, 3)); | ||
83 | |||
84 | @return $l $c $h; | ||
85 | } | ||
86 | |||
87 | @return null; | ||
88 | } | ||