Initial commit: OpenRA game engine

Fork from OpenRA/OpenRA with one-click launch script (start-ra.cmd)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

OpenRA.Game/Primitives/Size.cs

@@ -0,0 +1,79 @@
+#region Copyright & License Information
+/*
+ * Copyright (c) The OpenRA Developers and Contributors
+ * This file is part of OpenRA, which is free software. It is made
+ * available to you under the terms of the GNU General Public License
+ * as published by the Free Software Foundation, either version 3 of
+ * the License, or (at your option) any later version. For more
+ * information, see COPYING.
+ */
+#endregion
+
+using System;
+
+namespace OpenRA.Primitives
+{
+	public readonly struct Size : IEquatable<Size>
+	{
+		public readonly int Width;
+		public readonly int Height;
+
+		public static Size operator +(Size left, Size right)
+		{
+			return new Size(left.Width + right.Width, left.Height + right.Height);
+		}
+
+		public static bool operator ==(Size left, Size right)
+		{
+			return left.Width == right.Width && left.Height == right.Height;
+		}
+
+		public static bool operator !=(Size left, Size right)
+		{
+			return !(left == right);
+		}
+
+		public static Size operator -(Size sz1, Size sz2)
+		{
+			return new Size(sz1.Width - sz2.Width, sz1.Height - sz2.Height);
+		}
+
+		public Size(int width, int height)
+		{
+			Width = width;
+			Height = height;
+		}
+
+		public bool IsEmpty => Width == 0 && Height == 0;
+
+		public int2 ToInt2()
+		{
+			return new(Width, Height);
+		}
+
+		public static Size FromInt2(int2 xy)
+		{
+			return new(xy.X, xy.Y);
+		}
+
+		public bool Equals(Size other)
+		{
+			return this == other;
+		}
+
+		public override bool Equals(object obj)
+		{
+			if (obj is not Size)
+				return false;
+
+			return this == (Size)obj;
+		}
+
+		public override int GetHashCode()
+		{
+			return Width ^ Height;
+		}
+
+		public override string ToString() { return Width + "," + Height; }
+	}
+}