/// <summary>
/// Maps image pixels to lat-long values.
/// </summary>
/// <param name="tileMap">Tile mapper.</param>
/// <param name="hasData">Boolean indicates whether the coordinates maps to valid color.</param>
/// <returns>List of color values.</returns>
private List <Color> MapToColors(OctTileMap tileMap, out bool hasData)
{
List <Color> colors = new List <Color>(Constants.TileSize * Constants.TileSize);
Vector2d point = new Vector2d();
hasData = false;
for (int pixelY = 0; pixelY < Constants.TileSize; pixelY++)
{
point.Y = ((double)pixelY + 0.5) / Constants.TileSize;
for (int pixelX = 0; pixelX < Constants.TileSize; pixelX++)
{
point.X = ((double)pixelX + 0.5) / Constants.TileSize;
var v = tileMap.PointToRaDec(point);
Color color = (this.colorMap.GetColor(v.X, v.Y));
if (color != Color.Transparent)
{
hasData = true;
}
colors.Add(color);
}
}
return(colors);
}
public Task <Stream> GetOctTileAsync(int level, int tileX, int tileY, bool enforceBoundary, CancellationToken token)
{
var map = new OctTileMap(level, tileX, tileY);
// SDSS boundaries
// RA: 105 deg <-> 270 deg
// DEC: -3 deg <-> + 75 deg
if (enforceBoundary)
{
if (map.raMin > 270 | map.decMax < -3 | map.raMax < 105 | map.decMin > 75)
{
return(null);
}
}
Int32 sqSide = 256;
using Bitmap bmpOutput = new Bitmap(sqSide, sqSide);
FastBitmap bmpOutputFast = new FastBitmap(bmpOutput);
SdssImage sdim = new SdssImage(map.raMin, map.decMax, map.raMax, map.decMin, true);
sdim.LoadImage();
if (sdim.image != null)
{
sdim.Lock();
bmpOutputFast.LockBitmap();
// Fill up bmp from sdim
Vector2d vxy, vradec;
unsafe
{
PixelData *pPixel;
for (int y = 0; y < sqSide; y++)
{
pPixel = bmpOutputFast[0, y];
vxy.Y = (y / 255.0);
for (int x = 0; x < sqSide; x++)
{
vxy.X = (x / 255.0);
vradec = map.PointToRaDec(vxy);
*pPixel = sdim.GetPixelDataAtRaDec(vradec);
pPixel++;
}
}
}
sdim.Unlock();
sdim.image.Dispose();
bmpOutputFast.UnlockBitmap();
}
var result = bmpOutput.SaveToStream(ImageFormat.Png);
return(Task.FromResult(result));
}
/// <summary>
/// Creates the tile specified by level.
/// </summary>
/// <param name="level">
/// Zoom level.
/// </param>
/// <param name="tileX">
/// X tile coordinate.
/// </param>
/// <param name="tileY">
/// Y tile coordinate.
/// </param>
public void Create(int level, int tileX, int tileY)
{
// Map to convert from pixel position to global (longitude, latitude).
OctTileMap tileMap = new OctTileMap(level, tileX, tileY);
int[] colors = new int[Constants.TileSize * Constants.TileSize];
bool hasData = false;
int position = -1;
for (int pixelY = 0; pixelY < Constants.TileSize; pixelY++)
{
for (int pixelX = 0; pixelX < Constants.TileSize; pixelX++)
{
// Map pixel (u, v) position to (longitude, latitude).
double u = (0.5 + pixelX) / ((double)Constants.TileSize);
double v = (0.5 + pixelY) / ((double)Constants.TileSize);
Vector2d location = tileMap.PointToRaDec(new Vector2d(u, v));
double latitude = location.Y;
double longitude = location.X;
if (this.LookAtOutsideSurface)
{
longitude -= 180.0;
}
// Map geo location to an ARGB value.
Color color = this.ColorMap.GetColor(longitude, latitude);
// Store and update bit indicating whether actual data is present or not.
position++;
colors[position] = color.ToArgb();
if (hasData == false)
{
hasData = (color != Color.Transparent);
}
}
}
if (hasData)
{
TileHelper.ToBitmap(level, tileX, tileY, colors, this.TileSerializer, this.ReferenceTileSerializer);
}
}
public override void Run(IWwtContext context)
{
string query = context.Request.Params["Q"];
string[] values = query.Split(',');
int level = Convert.ToInt32(values[0]);
int tileX = Convert.ToInt32(values[1]);
int tileY = Convert.ToInt32(values[2]);
string filename;
string path;
string wwtTilesDir = ConfigurationManager.AppSettings["WWTTilesDir"];
string DSSTileCache = WWTUtil.GetCurrentConfigShare("DSSTileCache", true);
filename = String.Format(DSSTileCache + "\\SDSSToast\\{0}\\{2}\\{2}_{1}.png", level, tileX, tileY);
path = String.Format(DSSTileCache + "\\SDSSToast\\{0}\\{2}", level, tileX, tileY);
if (level > 14)
{
context.Response.Write("No image");
context.Response.Close();
return;
}
if (level < 9)
{
context.Response.ContentType = "image/png";
Stream s = PlateTilePyramid.GetFileStream(wwtTilesDir + "\\sdss_8.plate", level, tileX, tileY);
int length = (int)s.Length;
byte[] data = new byte[length];
s.Read(data, 0, length);
context.Response.OutputStream.Write(data, 0, length);
context.Response.Flush();
context.Response.End();
return;
}
/*
* if (!sdssTile )
* {
* // todo return black tile
* using (Bitmap bmp = Bitmap(256, 256))
* {
* using (Graphics g = Graphics.FromImage(bmp))
* {
* g.Clear(Color.Black);
* }
* bmp.Save(filename);
* context.Response.WriteFile(filename);
* }
* return;
* }
*/
if (File.Exists(filename))
{
try
{
context.Response.WriteFile(filename);
return;
}
catch
{
}
}
else
{
OctTileMap map = new OctTileMap(level, tileX, tileY);
Int32 sqSide = 256;
//Vector2d topLeft = map.PointToRaDec(new Vector2d(0, 0))
//map.PointToRaDec(new Vector2d(0, 1))
//map.PointToRaDec(new Vector2d(1, 0))
//map.PointToRaDec(new Vector2d(1, 1))
// SDSS boundaries
// RA: 105 deg <-> 270 deg
// DEC: -3 deg <-> + 75 deg
if (!(map.raMin > 270 | map.decMax < -3 | map.raMax < 105 | map.decMin > 75))
{
Bitmap bmpOutput = new Bitmap(sqSide, sqSide);
FastBitmap bmpOutputFast = new FastBitmap(bmpOutput);
SdssImage sdim = new SdssImage(map.raMin, map.decMax, map.raMax, map.decMin);
sdim.LoadImage();
sdim.Lock();
bmpOutputFast.LockBitmap();
// Fill up bmp from sdim
Vector2d vxy, vradec;
unsafe
{
PixelData *pPixel;
for (int y = 0; y < sqSide; y++)
{
pPixel = bmpOutputFast[0, y];
vxy.Y = (y / 255.0);
for (int x = 0; x < sqSide; x++)
{
vxy.X = (x / 255.0);
vradec = map.PointToRaDec(vxy);
*pPixel = sdim.GetPixelDataAtRaDec(vradec);
pPixel++;
}
}
}
bmpOutputFast.UnlockBitmap();
if (!Directory.Exists(path))
{
Directory.CreateDirectory(path);
}
bmpOutput.Save(filename, ImageFormat.Png);
bmpOutput.Dispose();
try
{
context.Response.WriteFile(filename);
}
catch
{
}
}
else
{
//context.Response.WriteFile(@"c:\inetpub\cache\empty.png");
context.Response.Write("No Image");
}
}
context.Response.End();
}
public override void Run(IWwtContext context)
{
if (context.Request.UserAgent.ToLower().Contains("wget"))
{
context.Response.Write("You are not allowed to bulk download imagery thru the tile service. Please contact [email protected] for more information.");
context.Response.End();
return;
}
string query = context.Request.Params["Q"];
string[] values = query.Split(',');
//++
// 2014-09-26 security fix.
//
int level = 0;
int tileX = 0;
int tileY = 0;
try
{
level = Convert.ToInt32(values[0]);
tileX = Convert.ToInt32(values[1]);
tileY = Convert.ToInt32(values[2]);
}
catch
{
context.Response.Write("Invalid query string.");
context.Response.End();
return;
}
string filename;
string path;
string wwtTilesDir = ConfigurationManager.AppSettings["WWTTilesDir"];
string DSSTileCache = WWTUtil.GetCurrentConfigShare("DSSTileCache", true);
filename = String.Format(DSSTileCache + "\\SDSSToast12\\{0}\\{2}\\{2}_{1}.png", level, tileX, tileY);
path = String.Format(DSSTileCache + "\\SDSSToast12\\{0}\\{2}", level, tileX, tileY);
if (level > 14)
{
context.Response.Write("No image");
context.Response.End();
return;
}
if (level < 8)
{
context.Response.ContentType = "image/png";
Stream s = PlateTilePyramid.GetFileStream(wwtTilesDir + "\\sdssdr12_7.plate", level, tileX, tileY);
int length = (int)s.Length;
if (length == 0)
{
context.Response.Clear();
context.Response.ContentType = "text/plain";
context.Response.Write("No image");
context.Response.End();
return;
}
byte[] data = new byte[length];
s.Read(data, 0, length);
context.Response.OutputStream.Write(data, 0, length);
context.Response.Flush();
context.Response.End();
return;
}
if (File.Exists(filename))
{
try
{
context.Response.WriteFile(filename);
return;
}
catch
{
}
}
else
{
OctTileMap map = new OctTileMap(level, tileX, tileY);
Int32 sqSide = 256;
Bitmap bmpOutput = new Bitmap(sqSide, sqSide);
FastBitmap bmpOutputFast = new FastBitmap(bmpOutput);
SdssImage sdim = new SdssImage(map.raMin, map.decMax, map.raMax, map.decMin, true);
sdim.LoadImage();
if (sdim.image != null)
{
sdim.Lock();
bmpOutputFast.LockBitmap();
// Fill up bmp from sdim
Vector2d vxy, vradec;
unsafe
{
PixelData *pPixel;
for (int y = 0; y < sqSide; y++)
{
pPixel = bmpOutputFast[0, y];
vxy.Y = (y / 255.0);
for (int x = 0; x < sqSide; x++)
{
vxy.X = (x / 255.0);
vradec = map.PointToRaDec(vxy);
*pPixel = sdim.GetPixelDataAtRaDec(vradec);
pPixel++;
}
}
}
sdim.Unlock();
sdim.image.Dispose();
bmpOutputFast.UnlockBitmap();
}
if (!Directory.Exists(path))
{
Directory.CreateDirectory(path);
}
bmpOutput.Save(filename, ImageFormat.Png);
bmpOutput.Dispose();
try
{
context.Response.WriteFile(filename);
}
catch
{
}
}
context.Response.End();
}