/// <summary>
/// Translates virtual texture address to physical rectangle in physical texture.
/// </summary>
/// <param name="address"></param>
/// <param name="rectangle"></param>
/// <returns>False if address is not presented in cache</returns>
public bool TranslateAddress(VTAddress address, VTTile tile, out Rectangle rectangle)
{
Page page;
if (cache.TryGetValue(address, out page))
{
var pa = page.Address;
var ppc = pageCount;
var size = VTConfig.PageSizeBordered;
int x = (pa % ppc) * size;
int y = (pa / ppc) * size;
int w = size;
int h = size;
rectangle = new Rectangle(x, y, w, h);
page.Tile = tile;
return(true);
}
else
{
rectangle = new Rectangle();
return(false);
}
}
/// <summary>
/// Functionas running in separate thread
/// </summary>
void LoaderTask()
{
while (!stopLoader)
{
VTAddress address;
#if USE_PRIORITY_QUEUE
address = default(VTAddress);
KeyValuePair <int, VTAddress> result;
if (!requestQueue.TryDequeue(out result))
{
//Thread.Sleep(1);
continue;
}
else
{
address = result.Value;
}
#else
if (!requestQueue.TryDequeue(out address))
{
//Thread.Sleep(1);
continue;
}
#endif
var fileName = address.GetFileNameWithoutExtension(".tile");
//Log.Message("...vt tile load : {0}", fileName );
try {
var tile = new VTTile(address);
tile.Read(storage.OpenFile(fileName, FileMode.Open, FileAccess.Read));
loadedTiles.Enqueue(tile);
} catch (IOException ioex) {
var tile = new VTTile(address);
tile.Clear(Color.Magenta);
loadedTiles.Enqueue(tile);
Log.Warning("{0}", ioex);
}
}
}
/// <summary>
/// Gets loaded tile or zero
/// </summary>
/// <returns></returns>
public bool TryGetTile(out VTTile image)
{
return(loadedTiles.TryDequeue(out image));
}
/// <summary>
/// Add tile to stamp queue
/// </summary>
/// <param name="tile"></param>
/// <param name="rect"></param>
public void Add(VTTile tile, Rectangle rect)
{
stamps[rect] = new Stamp(tile, rect);
}
/// <summary>
///
/// </summary>
/// <param name="tile"></param>
/// <param name="rect"></param>
public Stamp(VTTile tile, Rectangle rect)
{
this.Tile = tile;
this.Rectangle = rect;
}
