From 0adc2b7014d9909869bc9888ac90a3ec142d9488 Mon Sep 17 00:00:00 2001
From: Volpeon <git@volpeon.ink>
Date: Tue, 8 Oct 2024 12:36:57 +0200
Subject: Replace Oddbird with native SASS color functions

---
 src/functions/colors/_apca.scss | 54 ++++++++++++++++++++---------------------
 1 file changed, 27 insertions(+), 27 deletions(-)

(limited to 'src/functions/colors/_apca.scss')

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);
-- 
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