/// <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)
{
// Pre-compute tables to map from pixel position to global (longitude, latitude).
// Map size at this level.
double tileSize = (double)(((long)Constants.TileSize) << level);
// Compute longitudes across the tile (px = 0 at left edge);
double[] longitudes = new double[Constants.TileSize];
long pixelX = checked (tileX * Constants.TileSize);
for (int px = 0; px < Constants.TileSize; px++)
{
double x = ((pixelX + px) + 0.5) / tileSize;
longitudes[px] = 360.0 * x - 180.0;
}
// Compute latitudes across the tile (py = 0 at top edge).
double[] latitudes = new double[Constants.TileSize];
long pixelY = checked (tileY * Constants.TileSize);
for (int py = 0; py < Constants.TileSize; py++)
{
double y = 0.5 - (((pixelY + py) + 0.5) / tileSize);
latitudes[py] = 90.0 - (360.0 * Math.Atan(Math.Exp(-y * 2.0 * Math.PI)) / Math.PI);
}
int[] colors = new int[Constants.TileSize * Constants.TileSize];
bool hasData = false;
int position = -1;
for (int py = 0; py < Constants.TileSize; py++)
{
for (int px = 0; px < Constants.TileSize; px++)
{
// Map geo location to an ARGB value.
Color color = this.ColorMap.GetColor(longitudes[px], latitudes[py]);
// 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);
}
colors = null;
longitudes = null;
latitudes = null;
}
/// <summary>
/// Creates base tiles and the pyramid.
/// </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)
{
// Size of the image to extract before scaling it down to (side x side)
int tileSize = Constants.TileSize * (int)Math.Pow(2, MaximumLevelsOfDetail - level);
Bitmap tile = this.ExtractTile((tileX * tileSize), (tileY * tileSize), tileSize);
if (tile != null)
{
if (tileSize > Constants.TileSize)
{
tile = TileHelper.ResizeBitmap(tile, Constants.TileSize, Constants.TileSize);
}
this.TileSerializer.Serialize(tile, level, tileX, tileY);
}
}
/// <summary>
/// Creates a DEM tile creator instance for the specified projection type.
/// </summary>
/// <param name="map">
/// Color map used.
/// </param>
/// <param name="projectionType">
/// Projection type desired.
/// </param>
/// <param name="path">
/// Location where the tiles should be serialized.
/// </param>
/// <returns>
/// ITileCreator instance.
/// </returns>
public static ITileCreator CreateImageTileCreator(IColorMap map, ProjectionTypes projectionType, string path)
{
if (map == null)
{
throw new ArgumentNullException("map");
}
if (string.IsNullOrEmpty(path))
{
throw new ArgumentNullException("path");
}
IImageTileSerializer serializer = new ImageTileSerializer(TileHelper.GetDefaultImageTilePathTemplate(path), ImageFormat.Png);
return(CreateImageTileCreator(map, projectionType, serializer));
}
private void Initialize(Bitmap bitmap)
{
this.imageWidth = bitmap.Width;
this.imageHeight = bitmap.Height;
// Compute the maximum level of detail that this image supports.
// This is a function of size of the image.
this.MaximumLevelsOfDetail = TileHelper.CalculateMaximumLevel(this.imageHeight, this.imageWidth, this.inputBoundary);
// Get starting pixel values for x and y
Helper.LatLongToPixelXY(this.inputBoundary.Bottom, this.inputBoundary.Left, this.MaximumLevelsOfDetail, out startX, out startY);
// Get ending pixel values for x and y
Helper.LatLongToPixelXY(this.inputBoundary.Top, this.inputBoundary.Right, this.MaximumLevelsOfDetail, out endX, out endY);
// Get image data
this.imageData = TileHelper.BitmapToBytes(bitmap);
}
/// <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;
// For Toast projection, Longitude spans from 0 to +360 and latitude from +90 to -90.
// So we need to convert from -180 to +180 => 0 to +360.
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);
}
colors = null;
}
public static void ToBitmap(int level, int tileX, int tileY, int[] values, IImageTileSerializer serializer, IImageTileSerializer referenceImageSerializer)
{
byte[] referenceImage = null;
using (Bitmap image = new Bitmap(Constants.TileSize, Constants.TileSize, PixelFormat.Format32bppArgb))
{
// Set the data row by row
Rectangle dimension = new Rectangle(0, 0, Constants.TileSize, Constants.TileSize);
BitmapData imageData = image.LockBits(dimension, ImageLockMode.ReadWrite, PixelFormat.Format32bppArgb);
byte[] rgb = new byte[imageData.Stride];
int position = -1;
if (referenceImageSerializer != null)
{
referenceImage = TileHelper.BitmapToBytes(referenceImageSerializer.Deserialize(level, tileX, tileY));
}
for (int pixelY = 0; pixelY < Constants.TileSize; pixelY++)
{
Array.Clear(rgb, 0, rgb.Length);
int pos = 0;
Color referenceColor = Color.White;
for (int pixelX = 0; pixelX < Constants.TileSize; pixelX++)
{
Color color = Color.Transparent;
position++;
if (referenceImage != null)
{
if (referenceImage != null &&
referenceImage[(position * 4)] == referenceColor.B &&
referenceImage[(position * 4) + 1] == referenceColor.G &&
referenceImage[(position * 4) + 2] == referenceColor.R)
{
if (values != null)
{
color = Color.FromArgb(values[position]);
}
}
}
else
{
if (values != null)
{
color = Color.FromArgb(values[position]);
}
}
rgb[pos++] = color.B;
rgb[pos++] = color.G;
rgb[pos++] = color.R;
rgb[pos++] = color.A;
}
IntPtr p = new IntPtr(imageData.Scan0.ToInt64() + (pixelY * imageData.Stride));
System.Runtime.InteropServices.Marshal.Copy(rgb, 0, p, rgb.Length);
}
image.UnlockBits(imageData);
if (serializer != null)
{
serializer.Serialize(image, level, tileX, tileY);
}
imageData = null;
rgb = null;
}
}
public static void ToBitmap(int level, int tileX, int tileY, int[] values, IImageTileSerializer serializer)
{
TileHelper.ToBitmap(level, tileX, tileY, values, serializer, null);
}
/// <summary>
/// Aggregates lower level image tiles to construct upper level tiles.
/// </summary>
/// <param name="level">
/// Zoom level.
/// </param>
/// <param name="tileX">
/// X coordinate.
/// </param>
/// <param name="tileY">
/// Y coordinate.
/// </param>
public void CreateParent(int level, int tileX, int tileY)
{
TileHelper.CreateParent(level, tileX, tileY, this.TileSerializer);
}
