async private Task <byte[]> GetTile(IServiceRequestContext context, TileServiceMetadata metadata, int epsg, double scale, int row, int col, string format, GridOrientation orientation)
{
if (!metadata.EPSGCodes.Contains(epsg))
{
throw new ArgumentException("Wrong epsg argument");
}
//if (!metadata.Scales.Contains(scale))
// throw new ArgumentException("Wrong scale argument");
scale = metadata.Scales.GetScale(scale);
if (scale <= 0.0)
{
throw new ArgumentException("Wrong scale argument");
}
//IEnvelope bounds = metadata.GetEPSGEnvelope(epsg);
//if (bounds == null || bounds.Width == 0.0 || bounds.Height == 0.0)
// throw new Exception("No bounds defined for EPSG:" + epsg);
format = format.ToLower();
if (format != ".png" && format != ".jpg")
{
throw new Exception("Unsupported image format");
}
if (format == ".png" && metadata.FormatPng == false)
{
throw new Exception("Format image/png not supported");
}
if (format == ".jpg" && metadata.FormatJpg == false)
{
throw new Exception("Format image/jpeg no supported");
}
string path = _mapServer.TileCachePath + @"/" + MapName(context) + @"/_alllayers/" +
TileServiceMetadata.TilePath(orientation, epsg, scale, row, col) + format;
if ((orientation == GridOrientation.UpperLeft && metadata.UpperLeftCacheTiles) ||
(orientation == GridOrientation.LowerLeft && metadata.LowerLeftCacheTiles))
{
FileInfo fi = new FileInfo(path);
if (fi.Exists)
{
//context.ServiceRequest.Response = fi.FullName;
using (FileStream fs = File.Open(fi.FullName, FileMode.Open, FileAccess.Read, FileShare.Read)) //new FileStream(bundleFilename, FileMode.Open, FileAccess.Read))
{
byte[] data = new byte[fi.Length];
await fs.ReadAsync(data, 0, data.Length);
return(data);
}
}
}
return(null);
}
private void GetTile(IServiceRequestContext context, TileServiceMetadata metadata, int epsg, double scale, int row, int col, string format, GridOrientation orientation, bool renderOnTheFly)
{
if (!metadata.EPSGCodes.Contains(epsg))
{
throw new ArgumentException("Wrong epsg argument");
}
//if (!metadata.Scales.Contains(scale))
// throw new ArgumentException("Wrong scale argument");
scale = metadata.Scales.GetScale(scale);
if (scale <= 0.0)
{
throw new ArgumentException("Wrong scale argument");
}
//IEnvelope bounds = metadata.GetEPSGEnvelope(epsg);
//if (bounds == null || bounds.Width == 0.0 || bounds.Height == 0.0)
// throw new Exception("No bounds defined for EPSG:" + epsg);
format = format.ToLower();
if (format != ".png" && format != ".jpg")
{
throw new Exception("Unsupported image format");
}
if (format == ".png" && metadata.FormatPng == false)
{
throw new Exception("Format image/png not supported");
}
if (format == ".jpg" && metadata.FormatJpg == false)
{
throw new Exception("Format image/jpeg no supported");
}
string path = _mapServer.TileCachePath + @"\" + context.ServiceMap.Name + @"\_alllayers\" +
TileServiceMetadata.TilePath(orientation, epsg, scale, row, col) + format;
if ((orientation == GridOrientation.UpperLeft && metadata.UpperLeftCacheTiles) ||
(orientation == GridOrientation.LowerLeft && metadata.LowerLeftCacheTiles))
{
FileInfo fi = new FileInfo(path);
if (fi.Exists)
{
context.ServiceRequest.Response = fi.FullName;
return;
}
else if (!renderOnTheFly && !metadata.RenderTilesOnTheFly)
{
return; // Empty
}
if (!fi.Directory.Exists)
{
fi.Directory.Create();
}
}
else
{
path = _mapServer.OutputPath + @"\tile_" + Guid.NewGuid().ToString("N").ToLower() + format;
}
ISpatialReference sRef = SpatialReference.FromID("epsg:" + epsg);
using (IServiceMap map = context.ServiceMap)
{
map.Display.SpatialReference = sRef;
map.Display.dpi = metadata.Dpi;
map.Display.iWidth = metadata.TileWidth;
map.Display.iHeight = metadata.TileHeight;
double res = (double)scale / (metadata.Dpi / 0.0254);
if (map.Display.MapUnits != GeoUnits.Meters)
{
GeoUnitConverter converter = new GeoUnitConverter();
res = converter.Convert(res, GeoUnits.Meters, map.Display.MapUnits);
}
var origin = orientation == GridOrientation.UpperLeft ? metadata.GetOriginUpperLeft(epsg) : metadata.GetOriginLowerLeft(epsg);
double H = metadata.TileHeight * res;
double y = (orientation == GridOrientation.UpperLeft ?
origin.Y - H * (row + 1) :
origin.Y + H * row);
double W = metadata.TileWidth * res;
//if (map.Display.MapUnits == GeoUnits.DecimalDegrees)
//{
// double phi = (2 * y + H) / 2.0;
// W /= Math.Cos(phi / 180.0 * Math.PI);
//}
double x = origin.X + W * col;
map.Display.ZoomTo(new Envelope(x, y, x + W, y + H));
map.Render();
bool maketrans = map.Display.MakeTransparent;
map.Display.MakeTransparent = true;
map.SaveImage(path, format == ".jpg" ? System.Drawing.Imaging.ImageFormat.Jpeg : System.Drawing.Imaging.ImageFormat.Png);
map.Display.MakeTransparent = maketrans;
context.ServiceRequest.Response = path;
_mapServer.Log("CreateTile:", loggingMethod.request_detail, path);
}
}
