From fd2e9a004968f622d8219d3768c631ca008ef2e9 Mon Sep 17 00:00:00 2001
From: Darth Affe <darthaffe@wyrez.org>
Date: Sat, 5 Sep 2020 23:47:05 +0200
Subject: [PATCH] Added color-extension to calculate the distance between two
 colors

---
 RGB.NET.Core/Extensions/ColorExtensions.cs | 30 ++++++++++++++++++++++
 1 file changed, 30 insertions(+)
 create mode 100644 RGB.NET.Core/Extensions/ColorExtensions.cs

diff --git a/RGB.NET.Core/Extensions/ColorExtensions.cs b/RGB.NET.Core/Extensions/ColorExtensions.cs
new file mode 100644
index 0000000..15d0c80
--- /dev/null
+++ b/RGB.NET.Core/Extensions/ColorExtensions.cs
@@ -0,0 +1,30 @@
+using System;
+
+namespace RGB.NET.Core
+{
+    public static class ColorExtensions
+    {
+        #region Methods
+
+        /// <summary>
+        /// Calculates the distance between the two given colors using the redmean algorithm.
+        /// For more infos check https://www.compuphase.com/cmetric.htm
+        /// </summary>
+        /// <param name="color1">The start color of the distance calculation.</param>
+        /// <param name="color2">The end color fot the distance calculation.</param>
+        /// <returns></returns>
+        public static double DistanceTo(this Color color1, Color color2)
+        {
+            (_, byte r1, byte g1, byte b1) = color1.GetRGBBytes();
+            (_, byte r2, byte g2, byte b2) = color2.GetRGBBytes();
+
+            long rmean = (r1 + r2) / 2;
+            long r = r1 - r2;
+            long g = g1 - g2;
+            long b = b1 - b2;
+            return Math.Sqrt((((512 + rmean) * r * r) >> 8) + (4 * g * g) + (((767 - rmean) * b * b) >> 8));
+        }
+
+        #endregion
+    }
+}