From 029fb64837173b70b31ac579cb005c2995806c49 Mon Sep 17 00:00:00 2001
From: Volpeon <git@volpeon.ink>
Date: Mon, 24 Jun 2024 09:14:43 +0200
Subject: Update

---
 src/_functions.scss | 101 +++++++++++++++++++++++-----------------------------
 1 file changed, 45 insertions(+), 56 deletions(-)

(limited to 'src/_functions.scss')

diff --git a/src/_functions.scss b/src/_functions.scss
index 2d4aeef..9c29285 100644
--- a/src/_functions.scss
+++ b/src/_functions.scss
@@ -7,8 +7,9 @@
 @use '@oddbird/blend';
 @use '@oddbird/blend/sass/convert' as blend-convert;
 
-@use 'functions/colors' as iro-colors;
 @use 'iro-sass/src/index' as iro;
+@use 'iro-sass/src/easing' as easing;
+@use 'functions/colors' as iro-colors;
 @use 'config';
 
 @function color($key, $tree: iro.$props-default-tree, $default: null, $global: false) {
@@ -66,51 +67,6 @@
     @return list.nth(blend-convert.lin_sRGB_to_XYZ(blend-convert.lin_sRGB(blend-convert.sassToRgb($color))), 2) + .05;
 }
 
-@function multi-contrast($base-color, $colors, $wanted-contrasts, $reference-color: $base-color) {
-    $ref-lum: lum($reference-color);
-
-    $result:     ();
-    $colors-len: list.length($colors);
-    $colors-idx: 1;
-    $wanted-len: list.length($wanted-contrasts);
-    $wanted-idx: 1;
-
-    @while $colors-idx <= $colors-len and $wanted-idx <= $wanted-len {
-        $color:    list.nth($colors, $colors-idx);
-        $lum:      lum($color);
-        $contrast: math.div(math.max($ref-lum, $lum), math.min($lum, $ref-lum));
-
-        @if $contrast != 1 {
-            @if $lum <= $ref-lum {
-                $contrast: -1 * $contrast;
-            }
-        }
-
-        $wanted:          list.nth($wanted-contrasts, $wanted-idx);
-        $wanted-key:      list.nth($wanted, 1);
-        $wanted-contrast: list.nth($wanted, 2);
-
-        @if $contrast >= $wanted-contrast {
-            $result:     map.set($result, $wanted-key, $color);
-            $wanted-idx: $wanted-idx + 1;
-        } @else {
-            $colors-idx: $colors-idx + 1;
-        }
-    }
-
-    $last-color: list.nth($colors, $colors-len);
-
-    @if $wanted-idx <= $wanted-len {
-        @for $i from $wanted-idx through $wanted-len {
-            $wanted:     list.nth($wanted-contrasts, $i);
-            $wanted-key: list.nth($wanted, 1);
-            $result:     map.set($result, $wanted-key, $last-color);
-        }
-    }
-
-    @return $result;
-}
-
 @function palette-old($base-color, $contrasts, $chroma-range: 1, $reference-color: $base-color) {
     $chroma-range: 1 - $chroma-range;
 
@@ -159,17 +115,33 @@
             )
         )
     );
+    $ref-lch: blend-convert.Lab_to_LCH(
+        iro-colors.lin_sRGB_to_Oklab(
+            blend-convert.lin_sRGB(
+                blend-convert.sassToRgb($reference-color)
+            )
+        )
+    );
+    $ref-l: list.nth($ref-lch, 1);
     $ref-y: iro-colors.apca_sRGB_to_Y($reference-color);
 
+    $cmax: math.max(map.values($contrasts)...);
+    $cmax: math.max($cmax, math.abs(math.min(map.values($contrasts)...)));
+
+    $black-y: iro-colors.apca_sRGB_to_Y(#000);
+    $white-y: iro-colors.apca_sRGB_to_Y(#fff);
+
     $palette: ();
 
+    $chroma-easing: meta.get-function(config.$palette-chroma-easing, $module: easing);
+
     @each $key, $contrast in $contrasts {
+        //$i: math.div(list.length($palette), 2 * (list.length($contrasts) - 1));
         $y: iro-colors.apcaReverse($contrast, $ref-y);
         $l: list.nth($base-lch, 1);
+        $c: 1;
 
         @if $y != false {
-            @debug $contrast, $ref-y, $y, iro-colors.apca_Y_to_sRGB($y);
-    
             $y-lch: blend-convert.Lab_to_LCH(
                 iro-colors.lin_sRGB_to_Oklab(
                     blend-convert.lin_sRGB(
@@ -181,20 +153,37 @@
             );
             $l: list.nth($y-lch, 1);
         } @else {
-            @debug $contrast, $ref-y, $y;
+            $y: $ref-y;
+        }
+
+        @if $chroma-range != 1 {
+            $c: if(
+                $ref-l > .5,
+                math.clamp(0, math.div($contrast, $cmax), 1),
+                -1 * math.clamp(-1, math.div($contrast, $cmax), 0)
+            );
+            $c: meta.call($chroma-easing, $c);
+            $c: $chroma-range + (1 - $chroma-range) * $c;
         }
 
-        $color: oklch($l * 100% list.nth($base-lch, 2) list.nth($base-lch, 3));
-        //$color: blend-convert.LCH_to_Lab($color);
-        //$color: iro-colors.Oklab_to_lin_sRGB($color);
-        //$color: blend-convert();
+        $color: oklch(($l * 100%) ($c * list.nth($base-lch, 2)) list.nth($base-lch, 3));
+        //$color: $l, $c * list.nth($base-lch, 2), list.nth($base-lch, 3);
+        //$color: blend-convert.rgbToSass(
+        //    blend-convert.gam_sRGB(
+        //        iro-colors.Oklab_to_lin_sRGB(
+        //            blend-convert.LCH_to_Lab($color)
+        //        )
+        //    )
+        //);
+
+        $contrast-black: iro-colors.apcaContrast($black-y, $y);
+        $contrast-white: iro-colors.apcaContrast($white-y, $y);
 
         $palette: map.set($palette, $key, $color);
-        $palette: map.set($palette, #{$key}-text, if($l > 50%, #000, #fff));
+        $palette: map.set($palette, #{$key}-text, if(math.abs($contrast-black) > math.abs($contrast-white), #000, #fff));
+        //$palette: map.set($palette, #{$key}-text, blend.contrast($color));
     }
 
-    @debug '-------------------------------------------';
-
     @return $palette;
 }
 
-- 
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