1 files changed, 91 insertions, 0 deletions
diff --git a/color-utils.c b/color-utils.c
new file mode 100755
index 0000000..d01da3a
--- /dev/null
+++ b/color-utils.c
@@ -0,0 +1,91 @@
+#ifndef color_utils_c
+#define color_utils_c
+#include <math.h>
+
+struct RGB
+{
+	unsigned char R;
+	unsigned char G;
+	unsigned char B;
+};
+struct HSV
+{
+	double H;
+	double S;
+	double V;
+};
+struct RGB HSVToRGB(struct HSV hsv) {
+	double r = 0, g = 0, b = 0;
+
+	if (hsv.S == 0)
+	{
+		r = hsv.V;
+		g = hsv.V;
+		b = hsv.V;
+	}
+	else
+	{
+		int i;
+		double f, p, q, t;
+
+		if (hsv.H == 360)
+			hsv.H = 0;
+		else
+			hsv.H = hsv.H / 60;
+
+		i = (int)trunc(hsv.H);
+		f = hsv.H - i;
+
+		p = hsv.V * (1.0 - hsv.S);
+		q = hsv.V * (1.0 - (hsv.S * f));
+		t = hsv.V * (1.0 - (hsv.S * (1.0 - f)));
+
+		switch (i)
+		{
+		case 0:
+			r = hsv.V;
+			g = t;
+			b = p;
+			break;
+
+        case 1:
+            r = q;
+            g = hsv.V;
+            b = p;
+            break;
+
+		case 2:
+			r = p;
+			g = hsv.V;
+			b = t;
+			break;
+
+		case 3:
+			r = p;
+			g = q;
+			b = hsv.V;
+			break;
+
+		case 4:
+			r = t;
+			g = p;
+			b = hsv.V;
+			break;
+
+		default:
+			r = hsv.V;
+			g = p;
+			b = q;
+			break;
+		}
+
+	}
+
+	struct RGB rgb;
+	rgb.R = r * 255;
+	rgb.G = g * 255;
+	rgb.B = b * 255;
+
+	return rgb;
+}
+#endif