private Bitmap createTileAsync(uint level, uint tileX, uint tileY)
{
//Console.WriteLine("Creating tile. x: {0}, y: {1}, level: {2}", tileX, tileY, level);
// check if we're at the base of the pyramid
if (level == 0)
{
//Console.WriteLine("Writing tile to file - level: {0}, tileX: {1}, tileY: {2}", level, tileX, tileY);
Bitmap tile = tileReader.read(tileX, tileY);
// write tile to file
tile.Save(File.Create(outputDir + @"\" + string.Format("{0}_{1}_{2}.jpg", level, tileX, tileY)), ImageFormat.Jpeg);
// read a tile at the given coordinates and return the image
return(tile);
}
// create tasks for the four child tiles in the level below this one
Bitmap scaledImage = null;
uint[] xs = { 2 * tileX, 2 * tileX + 1 };
uint[] ys = { 2 * tileY, 2 * tileY + 1 };
using (var topLeft = Task <Bitmap> .Factory.StartNew(() => { return(createTileAsync(level - 1, xs[0], ys[0])); }))
using (var topRight = Task <Bitmap> .Factory.StartNew(() => { return(createTileAsync(level - 1, xs[1], ys[0])); }))
using (var bottomLeft = Task <Bitmap> .Factory.StartNew(() => { return(createTileAsync(level - 1, xs[0], ys[1])); }))
using (var bottomRight = Task <Bitmap> .Factory.StartNew(() => { return(createTileAsync(level - 1, xs[1], ys[1])); }))
{
// wait for the tasks to finish
Task.WaitAll(topLeft, topRight, bottomLeft, bottomRight);
// stitch the four subtiles into one
using (Bitmap image = ImageUtils.combine(topLeft.Result, topRight.Result, bottomLeft.Result, bottomRight.Result))
{
// scale to half the size
scaledImage = new Bitmap(image, image.Width / 2, image.Height / 2);
}
}
//Console.WriteLine("Writing tile to file - level: {0}, tileX: {1}, tileY: {2}", level, tileX, tileY);
// write tile to file
scaledImage.Save(File.Create(outputDir + @"\" + string.Format("{0}_{1}_{2}.jpg", level, tileX, tileY)), ImageFormat.Jpeg);
return(scaledImage);
}
private Bitmap createTile(uint level, uint tileX, uint tileY)
{
// check if we're at the base of the pyramid
if (level == 0)
{
//Console.WriteLine("Writing tile to file - level: {0}, tileX: {1}, tileY: {2}", level, tileX, tileY);
Bitmap tile = tileReader.read(tileX, tileY);
// write tile to file
tile.Save(File.Create(outputDir + @"\" + string.Format("{0}_{1}_{2}.jpg", level, tileX, tileY)), ImageFormat.Jpeg);
// read a tile at the given coordinates and return the image
return(tile);
}
// create tasks for the four child tiles in the level below this one
uint[] xs = { 2 * tileX, 2 * tileX + 1 };
uint[] ys = { 2 * tileY, 2 * tileY + 1 };
Bitmap scaledImage = null;
using (var topLeft = createTile(level - 1, xs[0], ys[0]))
using (var topRight = createTile(level - 1, xs[1], ys[0]))
using (var bottomLeft = createTile(level - 1, xs[0], ys[1]))
using (var bottomRight = createTile(level - 1, xs[1], ys[1]))
using (var image = ImageUtils.combine(topLeft, topRight, bottomLeft, bottomRight))
{
// scale to half the size
scaledImage = new Bitmap(image, image.Width / 2, image.Height / 2);
}
//Console.WriteLine("Writing tile to file - level: {0}, tileX: {1}, tileY: {2}", level, tileX, tileY);
// write tile to file
scaledImage.Save(File.Create(outputDir + @"\" + string.Format("{0}_{1}_{2}.jpg", level, tileX, tileY)), ImageFormat.Jpeg);
return(scaledImage);
}
