Add player badges.

OpenRA.Game/PlayerDatabase.cs

@@ -9,10 +9,79 @@
  */
 #endregion
 
+using System;
+using System.Collections.Generic;
+using System.Drawing;
+using System.IO;
+using System.Linq;
+using System.Net;
+using OpenRA.Graphics;
+
 namespace OpenRA
 {
 	public class PlayerDatabase : IGlobalModData
 	{
 		public readonly string Profile = "https://forum.openra.net/openra/info/";
+
+		[FieldLoader.Ignore]
+		readonly object syncObject = new object();
+
+		[FieldLoader.Ignore]
+		readonly Dictionary<string, Sprite> spriteCache = new Dictionary<string, Sprite>();
+
+		// 128x128 is large enough for 25 unique 24x24 sprites
+		[FieldLoader.Ignore]
+		SheetBuilder sheetBuilder;
+
+		public PlayerBadge LoadBadge(MiniYaml yaml)
+		{
+			if (sheetBuilder == null)
+			{
+				sheetBuilder = new SheetBuilder(SheetType.BGRA, 128);
+
+				// We must manually force the buffer creation to avoid a crash
+				// that is indirectly triggered by rendering from a Sheet that
+				// has not yet been written to.
+				sheetBuilder.Current.CreateBuffer();
+			}
+
+			var labelNode = yaml.Nodes.FirstOrDefault(n => n.Key == "Label");
+			var icon24Node = yaml.Nodes.FirstOrDefault(n => n.Key == "Icon24");
+			if (labelNode == null || icon24Node == null)
+				return null;
+
+			Sprite sprite;
+			lock (syncObject)
+			{
+				if (!spriteCache.TryGetValue(icon24Node.Value.Value, out sprite))
+				{
+					sprite = spriteCache[icon24Node.Value.Value] = sheetBuilder.Allocate(new Size(24, 24));
+
+					Action<DownloadDataCompletedEventArgs> onComplete = i =>
+					{
+						if (i.Error != null)
+							return;
+
+						try
+						{
+							var icon = new Bitmap(new MemoryStream(i.Result));
+							if (icon.Width == 24 && icon.Height == 24)
+							{
+								Game.RunAfterTick(() =>
+								{
+									Util.FastCopyIntoSprite(sprite, icon);
+									sprite.Sheet.CommitBufferedData();
+								});
+							}
+						}
+						catch { }
+					};
+
+					new Download(icon24Node.Value.Value, _ => { }, onComplete);
+				}
+			}
+
+			return new PlayerBadge(labelNode.Value.Value, sprite);
+		}
 	}
 }