Initial Commit

node_modules/color-space/hsv.js

@@ -0,0 +1,119 @@
+/**
+ * @module color-space/hsv
+ */
+import rgb from './rgb.js';
+import hsl from './hsl.js';
+
+
+var hsv = {
+	name: 'hsv',
+	min: [0, 0, 0],
+	max: [360, 100, 100],
+	channel: ['hue', 'saturation', 'value'],
+	alias: ['HSV', 'HSB'],
+
+	rgb: function (hsv) {
+		var h = hsv[0] / 60,
+			s = hsv[1] / 100,
+			v = hsv[2] / 100,
+			hi = (Math.floor(h) % 6);
+
+		var f = h - Math.floor(h),
+			p = 255 * v * (1 - s),
+			q = 255 * v * (1 - (s * f)),
+			t = 255 * v * (1 - (s * (1 - f)));
+		v *= 255;
+
+		switch (hi) {
+			case 0:
+				return [v, t, p];
+			case 1:
+				return [q, v, p];
+			case 2:
+				return [p, v, t];
+			case 3:
+				return [p, q, v];
+			case 4:
+				return [t, p, v];
+			case 5:
+				return [v, p, q];
+		}
+	},
+
+	hsl: function (hsv) {
+		var h = hsv[0],
+			s = hsv[1] / 100,
+			v = hsv[2] / 100,
+			sl, l;
+
+		l = (2 - s) * v;
+		sl = s * v;
+		sl /= (l <= 1) ? l : 2 - l;
+		sl = sl || 0;
+		l /= 2;
+
+		return [h, sl * 100, l * 100];
+	}
+};
+
+export default (hsv);
+
+
+//append rgb
+rgb.hsv = function (rgb) {
+	var r = rgb[0],
+		g = rgb[1],
+		b = rgb[2],
+		min = Math.min(r, g, b),
+		max = Math.max(r, g, b),
+		delta = max - min,
+		h, s, v;
+
+	if (max === 0) {
+		s = 0;
+	}
+	else {
+		s = (delta / max * 100);
+	}
+
+	if (max === min) {
+		h = 0;
+	}
+	else if (r === max) {
+		h = (g - b) / delta;
+	}
+	else if (g === max) {
+		h = 2 + (b - r) / delta;
+	}
+	else if (b === max) {
+		h = 4 + (r - g) / delta;
+	}
+
+	//FIXME h is possibly undefined
+	//@ts-ignore
+	h = Math.min(h * 60, 360);
+
+	if (h < 0) {
+		h += 360;
+	}
+
+	v = ((max / 255) * 1000) / 10;
+
+	return [h, s, v];
+};
+
+
+
+//extend hsl
+hsl.hsv = function (hsl) {
+	var h = hsl[0],
+		s = hsl[1] / 100,
+		l = hsl[2] / 100,
+		sv, v;
+	l *= 2;
+	s *= (l <= 1) ? l : 2 - l;
+	v = (l + s) / 2;
+	sv = (2 * s) / (l + s) || 0;
+
+	return [h, sv * 100, v * 100];
+};