public override TileData GetTile(TiledMapSession.Key key, IMapRenderer renderer, System.Threading.WaitCallback callback, object state)
{
if (key == Key.Root && !TileCache.ContainsKey(key))
{
TileCache.Add(Key.Root, new TileData(new StandardBitmap(Assembly.GetExecutingAssembly().GetManifestResourceStream("TiledMaps.VirtualEarth.msvesatellite.png"))));
}
return(base.GetTile(key, renderer, callback, state));
}
public abstract TileData GetTile(TiledMapSession.Key key, IMapRenderer renderer, System.Threading.WaitCallback callback, object state);
public override TileData GetTile(TiledMapSession.Key key, IMapRenderer renderer, System.Threading.WaitCallback callback, object state)
{
TileData tileData = null;
// try to get the tile
if (TileCache.TryGetValue(key, out tileData))
{
if (tileData != InvalidTile)
{
return(tileData);
}
TileCache.Remove(key);
}
// check if it is in the file cache
string tilePath = GetTilePathForKey(key);
if (File.Exists(tilePath))
{
FileInfo finfo = new FileInfo(tilePath);
if (DateTime.Now - finfo.CreationTime > new TimeSpan(2, 0, 0, 0))
{
// tile is old, expire it
File.Delete(tilePath);
}
else
{
TileCache[key] = null;
ThreadPool.QueueUserWorkItem((o) =>
{
try
{
using (FileStream fstream = new FileStream(tilePath, FileMode.Open))
{
IMapDrawable bitmap = renderer.GetBitmapFromStream(this, fstream);
TileCache[key] = new TileData(bitmap);
if (callback != null)
{
callback(state);
}
}
}
catch (Exception)
{
File.Delete(tilePath);
}
});
return(null);
}
}
// check if its a bad key
Uri uri = GetUriForKey(key);
if (uri != null)
{
// mark tile as being downloaded
TileCache[key] = null;
GetTileData data = new GetTileData();
data.Renderer = renderer;
data.Key = key;
data.Callback = callback;
data.State = state;
data.Uri = uri;
ThreadPool.QueueUserWorkItem(new WaitCallback(GetTile), data);
//GetTile(data);
}
return(tileData);
}
public override TileData GetTile(TiledMapSession.Key key, IMapRenderer renderer, System.Threading.WaitCallback callback, object state)
{
// make sure there's something to blend
if (mySessions.Count == 0)
{
return(null);
}
// see if we need to update this tile at all
int currentBlend = 0;
if (mySessionBlend.TryGetValue(key, out currentBlend) && currentBlend == myTotalBlend)
{
return(TileCache[key]);
}
// see how many tiles we can blend
int canBlend = 0;
for (int i = 0; i < mySessions.Count; i++)
{
if (!mySessionEnabled[i])
{
continue;
}
TileData data = mySessions[i].GetTile(key, renderer, callback, state);
if (data != null && data.Bitmap != null)
{
canBlend++;
}
}
// if there's nothing new to blend, don't
if (canBlend == currentBlend)
{
return(null);
}
mySessionBlend[key] = canBlend;
// get the target bitmap ready
if (RefreshBitmap == null)
{
throw new InvalidOperationException("You must provide a RefreshBitmap");
}
StandardBitmap refreshBitmap = RefreshBitmap as StandardBitmap;
int width = refreshBitmap.Width;
int height = refreshBitmap.Height;
StandardBitmap bitmap = new StandardBitmap(new Bitmap(width, height));
using (Graphics graphics = Graphics.FromImage(bitmap.Bitmap))
{
refreshBitmap.Draw(graphics, new Rectangle(0, 0, width, height), new Rectangle(0, 0, width, height));
}
// draw the bitmaps
using (Graphics graphics = Graphics.FromImage(bitmap.Bitmap))
{
for (int i = 0; i < mySessions.Count; i++)
{
TiledMapSession session = mySessions[i];
if (!mySessionEnabled[i])
{
continue;
}
TileData tile = mySessions[i].GetTile(key, renderer, callback, state);
if (tile == null)
{
continue;
}
IGraphicsDrawable tileBitmap = tile.Bitmap as IGraphicsDrawable;
tileBitmap.Draw(graphics, new Rectangle(0, 0, 256, 256), new Rectangle(0, 0, 256, 256));
if (ClearBlendedTiles && canBlend == myTotalBlend)
{
tileBitmap.Dispose();
mySessions[i].TileCache.Remove(key);
}
}
}
TileData ret;
if (!TileCache.TryGetValue(key, out ret))
{
ret = new TileData();
TileCache.Add(key, ret);
}
else if (ret.Bitmap != null)
{
ret.Bitmap.Dispose();
ret.Bitmap = null;
}
// TODO: optimize to do a lock/read load
MemoryStream mem = new MemoryStream();
bitmap.Bitmap.Save(mem, System.Drawing.Imaging.ImageFormat.Bmp);
mem.Seek(0, SeekOrigin.Begin);
ret.Bitmap = myRenderer.LoadBitmap(mem, false);
return(ret);
}
