Initial Commit

node_modules/color-space/cmyk.js

@@ -0,0 +1,42 @@
+/**
+ * @module color-space/cmyk
+ */
+import rgb from './rgb.js';
+
+const cmyk = {
+	name: 'cmyk',
+	min: [0, 0, 0, 0],
+	max: [100, 100, 100, 100],
+	channel: ['cyan', 'magenta', 'yellow', 'black'],
+	alias: ['CMYK'],
+
+	rgb: (cmyk) => {
+		let c = cmyk[0] / 100,
+			m = cmyk[1] / 100,
+			y = cmyk[2] / 100,
+			k = cmyk[3] / 100,
+			r, g, b;
+
+		r = 1 - Math.min(1, c * (1 - k) + k),
+			g = 1 - Math.min(1, m * (1 - k) + k),
+			b = 1 - Math.min(1, y * (1 - k) + k);
+
+		return [r * 255, g * 255, b * 255];
+	}
+};
+
+rgb.cmyk = (rgb) => {
+	let r = rgb[0] / 255,
+		g = rgb[1] / 255,
+		b = rgb[2] / 255,
+		c, m, y, k;
+
+	k = Math.min(1 - r, 1 - g, 1 - b);
+	c = (1 - r - k) / (1 - k) || 0;
+	m = (1 - g - k) / (1 - k) || 0;
+	y = (1 - b - k) / (1 - k) || 0;
+
+	return [c * 100, m * 100, y * 100, k * 100];
+};
+
+export default cmyk;