/// <summary>
/// Gets tile image for the specified tile id.
/// </summary>
/// <param name="id">Tile details id.</param>
/// <param name="level">Level of the image.</param>
/// <param name="x">X axis image.</param>
/// <param name="y">Y axis image.</param>
/// <returns>Tile image for the specified image.</returns>
public Stream GetTileImage(string id, int level, int x, int y)
{
Stream outputStream = null;
try
{
string pyramidFolderPath = Path.Combine(this.PyramidLocation, id, Constants.PyramidFolder);
string platesFolderPath = Path.Combine(this.PyramidLocation, id, Constants.PlatesFolder);
DirectoryInfo pyramidFolder = new DirectoryInfo(pyramidFolderPath);
DirectoryInfo platesFolder = new DirectoryInfo(platesFolderPath);
if (pyramidFolder.Exists)
{
string pyramidPath = Path.Combine(this.PyramidLocation, id, Constants.TileImagePath);
string filename = string.Format(CultureInfo.InvariantCulture, pyramidPath, level, x, y, ImageFormat.Png.ToString());
if (File.Exists(filename))
{
using (Bitmap bmp = new Bitmap(filename, false))
{
if (bmp != null)
{
outputStream = new MemoryStream();
bmp.Save(outputStream, ImageFormat.Png);
outputStream.Seek(0, SeekOrigin.Begin);
}
}
}
}
else if (platesFolder.Exists)
{
outputStream = PlateFileHelper.GetTileFromMultiplePlates(level, x, y, platesFolder.FullName);
}
else
{
// If Pyramid folder is not available, then try to read from plate file.
FileInfo plateFile = pyramidFolder.Parent.GetFiles(Constants.PlateFileSearchPattern).FirstOrDefault();
if (plateFile != null && plateFile.Exists)
{
PlateFile plateFileInstance = new PlateFile(plateFile.FullName, level);
outputStream = plateFileInstance.GetFileStream(level, x, y);
}
}
}
catch (ArgumentException ex)
{
ErrorHandler.LogException(ex);
throw new FaultException(ex.Message);
}
catch (IOException ex)
{
ErrorHandler.LogException(ex);
throw new FaultException(ex.Message);
}
catch (ObjectDisposedException ex)
{
ErrorHandler.LogException(ex);
throw new FaultException(ex.Message);
}
return(outputStream);
}
