Replace Oddbird with native SASS color functions

3 files changed, 27 insertions, 116 deletions

diff --git a/src/functions/colors/_apca.scss b/src/functions/colors/_apca.scss
index d9236b2..c848db7 100644
--- a/src/functions/colors/_apca.scss
+++ b/src/functions/colors/_apca.scss
@@ -9,34 +9,36 @@
 $SA98G: (
     mainTRC:     2.4,
 
-    sRco:        0.2126729, 
-    sGco:        0.7151522, 
-    sBco:        0.0721750,
+    sRco:        .2126729, 
+    sGco:        .7151522, 
+    sBco:        .072175,
 
-    normBG:      0.56, 
-    normTXT:     0.57,
-    revTXT:      0.62,
-    revBG:       0.65,
+    normBG:      .56, 
+    normTXT:     .57,
+    revTXT:      .62,
+    revBG:       .65,
 
-    blkThrs:     0.022,
+    blkThrs:     .022,
     blkClmp:     1.414,
     scaleBoW:    1.14,
     scaleWoB:    1.14,
-    loBoWoffset: 0.027,
-    loWoBoffset: 0.027,
-    deltaYmin:   0.0005,
-    loClip:      0.0001,
-
-    mFactor:     1.94685544331710,
-    mOffsetIn:   0.03873938165714010,
-    mExpAdj:     0.2833433964208690,
-    mOffsetOut:  0.3128657958707580,
+    loBoWoffset: .027,
+    loWoBoffset: .027,
+    deltaYmin:   .0005,
+    loClip:      .0001,
+
+    mFactor:     1.9468554433171,
+    mOffsetIn:   .0387393816571401,
+    mExpAdj:     .283343396420869,
+    mOffsetOut:  .312865795870758,
 );
 
 @function apca_sRGB_to_Y($color) {
-    @return map.get($SA98G, sRco) * math.pow(math.div(color.red($color), 255), map.get($SA98G, mainTRC)) +
-        map.get($SA98G, sGco) * math.pow(math.div(color.green($color), 255), map.get($SA98G, mainTRC)) +
-        map.get($SA98G, sBco) * math.pow(math.div(color.blue($color), 255), map.get($SA98G, mainTRC));
+    $rgb: color.to-space($color, rgb);
+
+    @return map.get($SA98G, sRco) * math.pow(math.div(color.channel($rgb, 'red'), 255), map.get($SA98G, mainTRC)) +
+        map.get($SA98G, sGco) * math.pow(math.div(color.channel($rgb, 'green'), 255), map.get($SA98G, mainTRC)) +
+        map.get($SA98G, sBco) * math.pow(math.div(color.channel($rgb, 'blue'), 255), map.get($SA98G, mainTRC));
 }
 
 @function apca_Y_to_sRGB($y) {
@@ -45,7 +47,7 @@ $SA98G: (
 }
 
 @function apcaContrast($txtY, $bgY) {
-    $icp: 0.0 1.1;
+    $icp:  1.1;
 
     @if math.min($txtY, $bgY) < list.nth($icp, 1) or math.max($txtY, $bgY) > list.nth($icp, 2) {
         @return 0;
@@ -78,7 +80,7 @@ $SA98G: (
         }
     }
 
-    @return $outputContrast * 100.0;
+    @return $outputContrast * 100;
 }
 
 @function apcaReverse($contrast, $knownY, $knownType: 'bg') {
@@ -90,7 +92,7 @@ $SA98G: (
     $scale:  map.get($SA98G, if($contrast > 0, scaleBoW, scaleWoB));
     $offset: map.get($SA98G, if($contrast > 0, loBoWoffset, loWoBoffset));
 
-    $contrast: math.div($contrast * 0.01 + $offset, $scale);
+    $contrast: math.div($contrast * .01 + $offset, $scale);
 
     @if $knownY <= map.get($SA98G, blkThrs) {
         $knownY: $knownY + math.pow(map.get($SA98G, blkThrs) - $knownY, map.get($SA98G, blkClmp));
@@ -115,10 +117,8 @@ $SA98G: (
     }
 
     @if $unknownY <= map.get($SA98G, blkThrs) {
-        $unknownY: math.pow(
-            ($unknownY + map.get($SA98G, mOffsetIn)) * map.get($SA98G, mFactor),
-            math.div(map.get($SA98G, mExpAdj), map.get($SA98G, blkClmp))
-        ) * math.div(1, map.get($SA98G, mFactor)) - map.get($SA98G, mOffsetOut);
+        $unknownY: math.pow(($unknownY + map.get($SA98G, mOffsetIn)) * map.get($SA98G, mFactor),
+            math.div(map.get($SA98G, mExpAdj), map.get($SA98G, blkClmp))) * math.div(1, map.get($SA98G, mFactor)) - map.get($SA98G, mOffsetOut);
     }
 
     $unknownY: math.max(math.min($unknownY, 1), 0);
diff --git a/src/functions/colors/_index.scss b/src/functions/colors/_index.scss
index 26c3027..9dad0f9 100644
--- a/src/functions/colors/_index.scss
+++ b/src/functions/colors/_index.scss
@@ -1,2 +1 @@
 @forward 'apca';
-@forward 'oklch';
diff --git a/src/functions/colors/_oklch.scss b/src/functions/colors/_oklch.scss
deleted file mode 100644
index e3df041..0000000
--- a/src/functions/colors/_oklch.scss
+++ /dev/null
@@ -1,88 +0,0 @@
-/* stylelint-disable scss/dollar-variable-pattern */
-/* stylelint-disable scss/at-function-pattern */
-
-@use 'sass:list';
-@use 'sass:math';
-@use 'sass:meta';
-@use 'sass:string';
-@use '@oddbird/blend/sass/convert' as blend-convert;
-@use '@oddbird/blend/sass/utils/pow';
-@use 'iro-sass/src/index' as iro;
-
-@function lin_sRGB_to_Oklab($color) {
-    $r_: list.nth($color, 1);
-    $g_: list.nth($color, 2);
-    $b_: list.nth($color, 3);
-
-    $l: pow.cbrt(0.4122214708 * $r_ + 0.5363325363 * $g_ + 0.0514459929 * $b_);
-    $m: pow.cbrt(0.2119034982 * $r_ + 0.6806995451 * $g_ + 0.1073969566 * $b_);
-        $s: pow.cbrt(0.0883024619 * $r_ + 0.2817188376 * $g_ + 0.6299787005 * $b_);
-    
-    @return (
-        0.2104542553 * $l + 0.7936177850 * $m - 0.0040720468 * $s,
-        1.9779984951 * $l - 2.4285922050 * $m + 0.4505937099 * $s,
-        0.0259040371 * $l + 0.7827717662 * $m - 0.8086757660 * $s,
-    );
-}
-
-@function Oklab_to_lin_sRGB($color) {
-    $l_: list.nth($color, 1);
-    $a_: list.nth($color, 2);
-    $b_: list.nth($color, 3);
-
-    $l: $l_ + 0.3963377774 * $a_ + 0.2158037573 * $b_;
-    $m: $l_ - 0.1055613458 * $a_ - 0.0638541728 * $b_;
-    $s: $l_ - 0.0894841775 * $a_ - 1.2914855480 * $b_;
-
-    $l: $l * $l * $l;
-    $m: $m * $m * $m;
-    $s: $s * $s * $s;
-    
-    @return (
-                 4.0767416621 * $l - 3.3077115913 * $m + 0.2309699292 * $s,
-                -1.2684380046 * $l + 2.6097574011 * $m - 0.3413193965 * $s,
-                -0.0041960863 * $l - 0.7034186147 * $m + 1.7076147010 * $s,
-    );
-}
-
-@function oklch($arg) {
-    $l: math.div(list.nth($arg, 1), 100%);
-    $c: list.nth($arg, 2);
-    $h: list.nth($arg, 3);
-
-    @return blend-convert.rgbToSass(
-        blend-convert.gam_sRGB(
-            Oklab_to_lin_sRGB(
-                blend-convert.LCH_to_Lab($l $c $h)
-            )
-        )
-    );
-}
-
-@function parse-oklch($color) {
-    @if meta.type-of($color) == 'color' {
-        @return blend-convert.Lab_to_LCH(
-            lin_sRGB_to_Oklab(
-                blend-convert.lin_sRGB(
-                    blend-convert.sassToRgb($color)
-                )
-            )
-        );
-    }
-
-    @if meta.type-of($color) != 'string' {
-        @return null;
-    }
-
-    @if string.slice($color, 1, 6) == 'oklch(' {
-        $args: string.split(string.slice($color, 7, -2), ' ');
-
-        $l: math.div(iro.fn-to-number(list.nth($args, 1)), 100%);
-        $c: iro.fn-to-number(list.nth($args, 2));
-        $h: iro.fn-to-number(list.nth($args, 3));
-
-        @return $l $c $h;
-    }
-
-    @return null;
-}