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/Graphics/RgbaSpriteRenderer.cs

@@ -0,0 +1,57 @@
+#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.Graphics
+{
+	public class RgbaSpriteRenderer
+	{
+		readonly SpriteRenderer parent;
+
+		public RgbaSpriteRenderer(SpriteRenderer parent)
+		{
+			this.parent = parent;
+		}
+
+		public void DrawSprite(Sprite s, in float3 location, in float3 scale, float rotation = 0f)
+		{
+			if (s.Channel != TextureChannel.RGBA)
+				throw new InvalidOperationException("DrawRGBASprite requires a RGBA sprite.");
+
+			parent.DrawSprite(s, 0, location, scale, rotation);
+		}
+
+		public void DrawSprite(Sprite s, in float3 location, float scale = 1f, float rotation = 0f)
+		{
+			if (s.Channel != TextureChannel.RGBA)
+				throw new InvalidOperationException("DrawRGBASprite requires a RGBA sprite.");
+
+			parent.DrawSprite(s, 0, location, scale, rotation);
+		}
+
+		public void DrawSprite(Sprite s, in float3 location, float scale, in float3 tint, float alpha, float rotation = 0f)
+		{
+			if (s.Channel != TextureChannel.RGBA)
+				throw new InvalidOperationException("DrawRGBASprite requires a RGBA sprite.");
+
+			parent.DrawSprite(s, 0, location, scale, tint, alpha, rotation);
+		}
+
+		public void DrawSprite(Sprite s, in float3 a, in float3 b, in float3 c, in float3 d, in float3 tint, float alpha)
+		{
+			if (s.Channel != TextureChannel.RGBA)
+				throw new InvalidOperationException("DrawRGBASprite requires a RGBA sprite.");
+
+			parent.DrawSprite(s, 0, a, b, c, d, tint, alpha);
+		}
+	}
+}