chore: initial commit

2021-12-29 14:31:45 -05:00
commit f17a913405
29 changed files with 2677 additions and 0 deletions
@@ -0,0 +1,36 @@
+using System.Numerics;
+
+namespace ChatTwo.Util;
+
+internal static class ColourUtil {
+    private static (byte r, byte g, byte b, byte a) RgbaToComponents(uint rgba) {
+        var r = (byte) ((rgba & 0xFF000000) >> 24);
+        var g = (byte) ((rgba & 0xFF0000) >> 16);
+        var b = (byte) ((rgba & 0xFF00) >> 8);
+        var a = (byte) (rgba & 0xFF);
+        return (r, g, b, a);
+    }
+
+    internal static uint RgbaToAbgr(uint rgba) {
+        var (r, g, b, a) = RgbaToComponents(rgba);
+        return (uint) ((a << 24) | (b << 16) | (g << 8) | r);
+    }
+
+    internal static Vector3 RgbaToVector3(uint rgba) {
+        var (r, g, b, _) = RgbaToComponents(rgba);
+        return new Vector3((float) r / 255, (float) g / 255, (float) b / 255);
+    }
+
+    internal static uint Vector3ToRgba(Vector3 col) {
+        return ComponentsToRgba(
+            (byte) Math.Round(col.X * 255),
+            (byte) Math.Round(col.Y * 255),
+            (byte) Math.Round(col.Z * 255)
+        );
+    }
+
+    internal static uint ComponentsToRgba(byte red, byte green, byte blue, byte alpha = 0xFF) => alpha
+                                                                                                 | (uint) (red << 24)
+                                                                                                 | (uint) (green << 16)
+                                                                                                 | (uint) (blue << 8);
+}