First Commit

node_modules/culori/src/hsi/convertHsiToRgb.js

@@ -0,0 +1,59 @@
+import normalizeHue from '../util/normalizeHue.js';
+
+// Based on: https://en.wikipedia.org/wiki/HSL_and_HSV#Converting_to_RGB
+
+export default function convertHsiToRgb({ h, s, i, alpha }) {
+	h = normalizeHue(h);
+	let f = Math.abs(((h / 60) % 2) - 1);
+	let res;
+	switch (Math.floor(h / 60)) {
+		case 0:
+			res = {
+				r: i * (1 + s * (3 / (2 - f) - 1)),
+				g: i * (1 + s * ((3 * (1 - f)) / (2 - f) - 1)),
+				b: i * (1 - s)
+			};
+			break;
+		case 1:
+			res = {
+				r: i * (1 + s * ((3 * (1 - f)) / (2 - f) - 1)),
+				g: i * (1 + s * (3 / (2 - f) - 1)),
+				b: i * (1 - s)
+			};
+			break;
+		case 2:
+			res = {
+				r: i * (1 - s),
+				g: i * (1 + s * (3 / (2 - f) - 1)),
+				b: i * (1 + s * ((3 * (1 - f)) / (2 - f) - 1))
+			};
+			break;
+		case 3:
+			res = {
+				r: i * (1 - s),
+				g: i * (1 + s * ((3 * (1 - f)) / (2 - f) - 1)),
+				b: i * (1 + s * (3 / (2 - f) - 1))
+			};
+			break;
+		case 4:
+			res = {
+				r: i * (1 + s * ((3 * (1 - f)) / (2 - f) - 1)),
+				g: i * (1 - s),
+				b: i * (1 + s * (3 / (2 - f) - 1))
+			};
+			break;
+		case 5:
+			res = {
+				r: i * (1 + s * (3 / (2 - f) - 1)),
+				g: i * (1 - s),
+				b: i * (1 + s * ((3 * (1 - f)) / (2 - f) - 1))
+			};
+			break;
+		default:
+			res = { r: i * (1 - s), g: i * (1 - s), b: i * (1 - s) };
+	}
+
+	res.mode = 'rgb';
+	if (alpha !== undefined) res.alpha = alpha;
+	return res;
+}