Initial Commit

node_modules/color-space/xyy.js

@@ -0,0 +1,37 @@
+/**
+ * Additional xyY space, where xy are relative chromacity params
+ *
+ * @module color-space/xyy
+ */
+import xyz from './xyz.js';
+
+var xyy = {
+	name: 'xyy',
+	min: [0, 0, 0],
+	max: [1, 1, 100],
+	channel: ['x', 'y', 'Y'],
+	alias: ['xyY', 'Yxy', 'yxy']
+};
+
+xyy.xyz = function (arg) {
+	var X, Y, Z, x, y;
+	x = arg[0]; y = arg[1]; Y = arg[2];
+	if (y === 0) {
+		return [0, 0, 0];
+	}
+	X = x * Y / y;
+	Z = (1 - x - y) * Y / y;
+	return [X, Y, Z];
+};
+
+xyz.xyy = function (arg) {
+	var sum, X, Y, Z;
+	X = arg[0]; Y = arg[1]; Z = arg[2];
+	sum = X + Y + Z;
+	if (sum === 0) {
+		return [0, 0, Y];
+	}
+	return [X / sum, Y / sum, Y];
+};
+
+export default (xyy);