mostly fixes openra startup time

git-svn-id: svn://svn.ijw.co.nz/svn/OpenRa@1928 993157c7-ee19-0410-b2c4-bb4e9862e678

OpenRa.Game/Sprite.cs

@@ -10,30 +10,23 @@ namespace OpenRa.Game
 		public readonly Rectangle bounds;
 		public readonly Sheet sheet;
 		public readonly TextureChannel channel;
+		public readonly RectangleF uv;
 
 		internal Sprite(Sheet sheet, Rectangle bounds, TextureChannel channel)
 		{
 			this.bounds = bounds;
 			this.sheet = sheet;
 			this.channel = channel;
-		}
 
-		RectangleF TextureCoords
-		{
-			get
-			{
-				return new RectangleF(
+			uv = new RectangleF(
 					(float)(bounds.Left + 0.5f) / sheet.Size.Width,
 					(float)(bounds.Top + 0.5f) / sheet.Size.Height,
 					(float)(bounds.Width) / sheet.Size.Width,
 					(float)(bounds.Height) / sheet.Size.Height);
-			}
 		}
 
 		public float2 MapTextureCoords(float2 p)
 		{
-			RectangleF uv = TextureCoords;
-
 			return new float2(
 				p.X > 0 ? uv.Right : uv.Left,
 				p.Y > 0 ? uv.Bottom : uv.Top);
@@ -42,9 +35,9 @@ namespace OpenRa.Game
 
 	public enum TextureChannel
 	{
-		Red,
-		Green,
-		Blue,
-		Alpha,
+		Red = 0,
+		Green = 1,
+		Blue = 2,
+		Alpha = 3,
 	}
 }