public TileScalerRunner(TileScaler baseScaler, string basePath, int zoom, Size renderScale, Size tileSize)
{
Scaler = baseScaler;
BasePath = basePath;
Zoom = zoom;
Scale = 1 << Zoom;
RegionTileSize = new Size((renderScale.Width * (1 << 9)) / Scale, (renderScale.Height * (1 << 9)) / Scale);
TileSize = tileSize;
_timer = new Timer(TimerCallback, null, ExecInterval, ExecInterval);
}
public TileScaler(string basePath, Size renderScale, Size tileSize, int minZoom, int maxZoom, string levelId, string layerId)
{
LevelId = levelId;
LayerId = layerId;
var size = maxZoom - minZoom + 1;
_runners = new TileScalerRunner[size];
var i = 0;
for (int z = minZoom; z <= maxZoom; z++)
{
_runners[i] = new TileScalerRunner(this, basePath, z, renderScale, tileSize);
i++;
}
//Log.InfoFormat("TileScaler created with id {0} {1}->{2} ({3} - {4}) {5}", layerId, minZoom, maxZoom, tileSize, renderScale, basePath);
}
private void Load()
{
var size = new Size(Layer.Renderer.RenderScale.Width * (1 << 9),
Layer.Renderer.RenderScale.Height * (1 << 9));
lock (_ioSync)
{
//Log.InfoFormat("Loading Tile {0},{1}@{2}", Position.X, Position.Z, Position.Zoom);
Bitmap bitmap = null;
if (File.Exists(FilePath))
{
using (var fs = new FileStream(FilePath, FileMode.Open, FileAccess.ReadWrite))
{
using (var img = Image.FromStream(fs))
{
if (img.Width == size.Width && img.Height == size.Height)
{
bitmap = new Bitmap(img);
}
}
}
}
if (bitmap == null)
{
bitmap = new Bitmap(size.Width, size.Height);
IsNew = true;
}
lock (_bitmapSync)
{
Bitmap = bitmap;
BitmapBounds = new RectangleF(0, 0, Bitmap.Width, Bitmap.Height);
Graphics = bitmap.GetGraphics();
if (IsNew)
{
Graphics.Clear(Layer.Renderer.Background);
}
}
}
}