new chrome stuff

OpenRa.Game/Graphics/Sheet.cs

@@ -1,6 +1,7 @@
 using System.Drawing;
 using System.IO;
 using Ijw.DirectX;
+using OpenRa.FileFormats;
 
 namespace OpenRa.Game.Graphics
 {
@@ -18,6 +19,12 @@ namespace OpenRa.Game.Graphics
 			this.bitmap = new Bitmap(size.Width, size.Height);
 		}
 
+		public Sheet(Renderer renderer, string filename)
+		{
+			this.renderer = renderer;
+			this.bitmap = (Bitmap)Image.FromStream(FileSystem.Open(filename));
+		}
+
 		void Resolve()
 		{
 			string filename = string.Format("../../../sheet-{0}.png", suffix++);