From 64a841c69ead262666dd0754218585d0f05cf735 Mon Sep 17 00:00:00 2001
From: Volpeon <git@volpeon.ink>
Date: Sun, 23 Jun 2024 19:05:33 +0200
Subject: WIP: New color calculations

---
 src/_functions.scss | 82 +++++++++++++++++++++++++++++++++++++++++++++++------
 1 file changed, 74 insertions(+), 8 deletions(-)

(limited to 'src/_functions.scss')

diff --git a/src/_functions.scss b/src/_functions.scss
index 8553833..2d4aeef 100644
--- a/src/_functions.scss
+++ b/src/_functions.scss
@@ -2,11 +2,15 @@
 @use 'sass:math';
 @use 'sass:map';
 @use 'sass:list';
-@use 'iro-sass/src/index' as iro;
-@use 'config';
+@use 'sass:meta';
+
 @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 'config';
+
 @function color($key, $tree: iro.$props-default-tree, $default: null, $global: false) {
     @return iro.props-get(list.join(--colors, $key), $tree, $default, $global);
 }
@@ -107,7 +111,9 @@
     @return $result;
 }
 
-@function palette($base-color, $contrasts, $range: 1, $desaturate: true, $reference-color: $base-color) {
+@function palette-old($base-color, $contrasts, $chroma-range: 1, $reference-color: $base-color) {
+    $chroma-range: 1 - $chroma-range;
+
     $palette: ();
 
     @if list.nth(list.nth($contrasts, 1), 2) > list.nth(list.nth($contrasts, list.length($contrasts)), 2) {
@@ -115,12 +121,25 @@
     }
 
     $reference-lightness: blend.lightness($reference-color);
-    $i: -100%;
+    $i: 0;
+
+    @while $i <= 1 {
+        $l: $i * 200% - 100%;
+        $c: 0%;
+
+        @if $chroma-range != 0 {
+            $c: $i * 2 - 1;
+            $c: if(
+                $reference-lightness >= 50%,
+                math.clamp(0, $c, 1),
+                math.clamp(0, -1 * $c, 1)
+            );
+            $c: $chroma-range * $c * -100%;
+        }
+
+        $palette: list.append($palette, blend.scale($base-color, $l: $l, $c: $c));
 
-    @while $i <= 100% {
-        $c:       if($desaturate, .8 * if($reference-lightness >= 50%, -1 * math.clamp(0%, $i, 100%), math.clamp(-100%, $i, 0%)), 0%);
-        $palette: list.append($palette, blend.scale($base-color, $l: $range * $i, $c: $c));
-        $i:       $i + config.$palette-precision;
+        $i: $i + config.$palette-precision;
     }
 
     $palette: multi-contrast($base-color, $palette, $contrasts, $reference-color);
@@ -132,6 +151,53 @@
     @return $palette;
 }
 
+@function palette($base-color, $contrasts, $chroma-range: 1, $reference-color: $base-color) {
+    $base-lch: blend-convert.Lab_to_LCH(
+        iro-colors.lin_sRGB_to_Oklab(
+            blend-convert.lin_sRGB(
+                blend-convert.sassToRgb($base-color)
+            )
+        )
+    );
+    $ref-y: iro-colors.apca_sRGB_to_Y($reference-color);
+
+    $palette: ();
+
+    @each $key, $contrast in $contrasts {
+        $y: iro-colors.apcaReverse($contrast, $ref-y);
+        $l: list.nth($base-lch, 1);
+
+        @if $y != false {
+            @debug $contrast, $ref-y, $y, iro-colors.apca_Y_to_sRGB($y);
+    
+            $y-lch: blend-convert.Lab_to_LCH(
+                iro-colors.lin_sRGB_to_Oklab(
+                    blend-convert.lin_sRGB(
+                        blend-convert.sassToRgb(
+                            iro-colors.apca_Y_to_sRGB($y)
+                        )
+                    )
+                )
+            );
+            $l: list.nth($y-lch, 1);
+        } @else {
+            @debug $contrast, $ref-y, $y;
+        }
+
+        $color: oklch($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();
+
+        $palette: map.set($palette, $key, $color);
+        $palette: map.set($palette, #{$key}-text, if($l > 50%, #000, #fff));
+    }
+
+    @debug '-------------------------------------------';
+
+    @return $palette;
+}
+
 @function px-to-em($size, $base: iro.$vars-root-size) {
     @return math.div($size, $base) * 1em;
 }
-- 
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