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.Platforms.Default/Sdl2HardwareCursor.cs

@@ -0,0 +1,73 @@
+#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;
+using System.IO;
+using System.Runtime.InteropServices;
+using OpenRA.Primitives;
+using SDL2;
+
+namespace OpenRA.Platforms.Default
+{
+	sealed class Sdl2HardwareCursor : IHardwareCursor
+	{
+		public IntPtr Cursor { get; private set; }
+		IntPtr surface;
+
+		public Sdl2HardwareCursor(Size size, byte[] data, int2 hotspot)
+		{
+			try
+			{
+				surface = SDL.SDL_CreateRGBSurface(0, size.Width, size.Height, 32, 0x00FF0000, 0x0000FF00, 0x000000FF, 0xFF000000);
+				if (surface == IntPtr.Zero)
+					throw new InvalidDataException($"Failed to create surface: {SDL.SDL_GetError()}");
+
+				var sur = Marshal.PtrToStructure<SDL.SDL_Surface>(surface);
+				Marshal.Copy(data, 0, sur.pixels, data.Length);
+
+				// This call very occasionally fails on Windows, but often works when retried.
+				for (var retries = 0; retries < 3 && Cursor == IntPtr.Zero; retries++)
+					Cursor = SDL.SDL_CreateColorCursor(surface, hotspot.X, hotspot.Y);
+			}
+			catch
+			{
+				Dispose();
+				throw;
+			}
+		}
+
+		public void Dispose()
+		{
+			Dispose(true);
+			GC.SuppressFinalize(this);
+		}
+
+		void Dispose(bool _)
+		{
+			if (Cursor != IntPtr.Zero)
+			{
+				SDL.SDL_FreeCursor(Cursor);
+				Cursor = IntPtr.Zero;
+			}
+
+			if (surface != IntPtr.Zero)
+			{
+				SDL.SDL_FreeSurface(surface);
+				surface = IntPtr.Zero;
+			}
+		}
+
+		~Sdl2HardwareCursor()
+		{
+			Dispose(false);
+		}
+	}
+}