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;
}
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);
}