/// <summary>
/// Adds a new tile.
/// </summary>
/// <param name="tile"></param>
/// <returns></returns>
public void Add(Tile tile)
{
if (tile.Zoom < _range.Zoom && _range.Zoom - tile.Zoom < 3)
{ // add this tile to all the subtiles.
var subTiles = tile.GetSubTiles(_range.Zoom);
foreach (var subTile in subTiles)
{
if (_range.Contains(subTile))
{ // ok, this tile is in this range.
this.Add(subTile.Id, tile);
}
}
}
else if (tile.Zoom > _range.Zoom && tile.Zoom - _range.Zoom < 3)
{ // find the tile that this subtile belongs to.
foreach (var rangedTile in _range)
{
if (rangedTile.Overlaps(tile))
{ // add this this tile here.
this.Add(rangedTile.Id, tile);
// this tile can only belong in one place.
return;
}
}
}
if (_range.Contains(tile))
{ // this tile is already the correct zoom.
this.Add(tile.Id, tile);
}
}
public void TestTileId()
{
var tile0 = new Tile(0, 0, 0);
Assert.AreEqual(0, tile0.Id);
var tile1_0_0 = new Tile(0, 0, 1);
Assert.AreEqual(1, tile1_0_0.Id);
var tile2_0_0 = new Tile(0, 0, 2);
Assert.AreEqual(5, tile2_0_0.Id);
var tile3_0_0 = new Tile(0, 0, 3);
Assert.AreEqual(5 + 16, tile3_0_0.Id);
var tile4_0_0 = new Tile(0, 0, 4);
Assert.AreEqual(5 + 16 + 64, tile4_0_0.Id);
var tile2_1_1 = new Tile(1, 1, 2);
Assert.AreEqual(5 + 1 + 4, tile2_1_1.Id);
var tile2_1_1_fromId = new Tile(5 + 1 + 4);
Assert.AreEqual(tile2_1_1.Zoom, tile2_1_1_fromId.Zoom);
Assert.AreEqual(tile2_1_1.X, tile2_1_1_fromId.X);
Assert.AreEqual(tile2_1_1.Y, tile2_1_1_fromId.Y);
for (ulong id = 0; id < 1000; id++)
{
Tile tile = new Tile(id);
Assert.AreEqual(id, tile.Id);
}
}
public void TestTileCreation()
{
// 51.27056&lon=4.78849
// http://tile.deltamedia.local/tile/16/33639/21862.png
Tile tile = new Tile(33639, 21862, 16);
Tile tile2 = Tile.CreateAroundLocation(tile.Box.Center, 16);
Assert.AreEqual(tile.X, tile2.X);
Assert.AreEqual(tile.Y, tile2.Y);
Assert.AreEqual(tile.Zoom, tile2.Zoom);
}
private static byte[] Download(string url, Tile tile)
{
// load the tile.
url = url.Replace("{z}", tile.Zoom.ToString())
.Replace("{x}", tile.X.ToString())
.Replace("{y}", tile.Y.ToString());
var request = (HttpWebRequest)HttpWebRequest.Create(
url);
request.Accept = "text/html, image/png, image/jpeg, image/gif, */*";
request.UserAgent = "OsmSharp/4.0";
OsmSharp.Logging.Log.TraceEvent(string.Empty, TraceEventType.Information, "Request tile@" + url);
return ReadToEnd(request.GetResponse().GetResponseStream());
}
public void TestTileBox()
{
Tile tile = new Tile(33639, 21862, 16);
for (double longitude = tile.Box.MinLon; longitude < tile.Box.MaxLon;
longitude = longitude + tile.Box.DeltaLon / 100)
{
for (double latitude = tile.Box.MinLat; latitude < tile.Box.MaxLat;
latitude = latitude + tile.Box.DeltaLon / 100)
{
Tile tile2 = Tile.CreateAroundLocation(new GeoCoordinate(
latitude, longitude), tile.Zoom);
Assert.AreEqual(tile.X, tile2.X);
Assert.AreEqual(tile.Y, tile2.Y);
Assert.AreEqual(tile.Zoom, tile2.Zoom);
}
}
}
public void TestTileSubtiles()
{
var tile = new Tile(0, 0, 0);
var subtiles = tile.SubTiles;
Assert.AreEqual(0, subtiles.XMin);
Assert.AreEqual(0, subtiles.YMin);
Assert.AreEqual(1, subtiles.XMax);
Assert.AreEqual(1, subtiles.YMax);
Assert.AreEqual(1, subtiles.Zoom);
subtiles = tile.GetSubTiles(1);
Assert.AreEqual(0, subtiles.XMin);
Assert.AreEqual(0, subtiles.YMin);
Assert.AreEqual(1, subtiles.XMax);
Assert.AreEqual(1, subtiles.YMax);
Assert.AreEqual(1, subtiles.Zoom);
subtiles = tile.GetSubTiles(2);
Assert.AreEqual(0, subtiles.XMin);
Assert.AreEqual(0, subtiles.YMin);
Assert.AreEqual(3, subtiles.XMax);
Assert.AreEqual(3, subtiles.YMax);
Assert.AreEqual(2, subtiles.Zoom);
tile = new Tile(1, 1, 1);
subtiles = tile.SubTiles;
Assert.AreEqual(2, subtiles.XMin);
Assert.AreEqual(2, subtiles.YMin);
Assert.AreEqual(3, subtiles.XMax);
Assert.AreEqual(3, subtiles.YMax);
Assert.AreEqual(2, subtiles.Zoom);
subtiles = tile.GetSubTiles(2);
Assert.AreEqual(2, subtiles.XMin);
Assert.AreEqual(2, subtiles.YMin);
Assert.AreEqual(3, subtiles.XMax);
Assert.AreEqual(3, subtiles.YMax);
Assert.AreEqual(2, subtiles.Zoom);
subtiles = tile.GetSubTiles(3);
Assert.AreEqual(4, subtiles.XMin);
Assert.AreEqual(4, subtiles.YMin);
Assert.AreEqual(7, subtiles.XMax);
Assert.AreEqual(7, subtiles.YMax);
Assert.AreEqual(3, subtiles.Zoom);
}
public void TestTileOverlaps()
{
var tile = new Tile(1, 1, 1);
Assert.IsTrue(tile.Overlaps(new Tile(1, 1, 1)));
Assert.IsTrue(tile.Overlaps(new Tile(3, 3, 2)));
Assert.IsTrue(tile.Overlaps(new Tile(8, 8, 4)));
Assert.IsFalse(tile.Overlaps(new Tile(0, 0, 3)));
Assert.IsFalse(tile.Overlaps(new Tile(0, 0, 4)));
}
/// <summary>
/// Renders a tile for the given zoom, x and y.
/// </summary>
/// <param name="x"></param>
/// <param name="y"></param>
/// <param name="zoom"></param>
/// <param name="type"></param>
/// <returns></returns>
protected virtual Stream Render(int x, int y, int scale, ushort zoom, ImageType type)
{
var tile = new Tile(x, y, zoom);
var projection = _map.Projection;
var zoomFactor = (float)projection.ToZoomFactor(zoom);
var center = tile.Box.Center;
var sizeInPixels = scale * 256;
// get target/image.
Bitmap image = null;
Graphics target = null;
lock(_targetsPerScale)
{
Tuple<Bitmap, Graphics> tuple;
if(!_targetsPerScale.TryGetValue(scale, out tuple))
{ // not there yet!
// build the target to render to.
image = new Bitmap(sizeInPixels, sizeInPixels);
target = Graphics.FromImage(image);
target.SmoothingMode = SmoothingMode.HighQuality;
target.PixelOffsetMode = PixelOffsetMode.HighQuality;
target.CompositingQuality = CompositingQuality.HighQuality;
target.InterpolationMode = InterpolationMode.HighQualityBicubic;
tuple = new Tuple<Bitmap, Graphics>(image, target);
_targetsPerScale[scale] = tuple;
}
target = tuple.Item2;
image = tuple.Item1;
}
var stream = new MemoryStream();
lock (target)
{
target.FillRectangle(Brushes.White, 0, 0, sizeInPixels, sizeInPixels);
var visibleView = _renderer.Create(256, 256, _map, zoomFactor, center, false, true);
var renderingView = _renderer.Create(256 * 3, 256 * 3, _map, zoomFactor, center, false, true);
_map.ViewChanged(zoomFactor, center, renderingView, renderingView);
_renderer.Render(target, _map, visibleView, renderingView, (float)_map.Projection.ToZoomFactor(zoom));
switch (type)
{
case ImageType.Png:
image.Save(stream, ImageFormat.Png);
break;
case ImageType.Bmp:
image.Save(stream, ImageFormat.Bmp);
break;
case ImageType.Jpeg:
image.Save(stream, ImageFormat.Jpeg);
break;
}
}
stream.Seek(0, SeekOrigin.Begin);
return stream;
}
/// <summary>
/// Chooses the best tile(s) for the given tile.
/// </summary>
/// <param name="tile">The tile to search tiles for.</param>
/// <param name="higherFirst">Choose tiles with a higher zoom level first, otherwise choose lower first.</param>
/// <returns></returns>
public IEnumerable<Tile> ChooseBest(Tile tile, bool higherFirst)
{
var tiles = new List<Tile>(this.Get(tile.Id));
tiles.Sort(delegate(Tile x, Tile y)
{
return TileRangeIndex.TileWeight(tile.Zoom, x.Zoom, higherFirst).CompareTo(
TileRangeIndex.TileWeight(tile.Zoom, y.Zoom, higherFirst));
});
return tiles;
}
/// <summary>
/// Returns true if this tiles cache contains the given tile.
/// </summary>
/// <param name="tile">The tile.</param>
/// <param name="scale">The scale.</param>
/// <param name="type">The type of image.</param>
/// <returns></returns>
public bool Has(Tile tile, int scale, ImageType type)
{
var fileInfo = this.GetTileFile(tile, scale, type);
lock (fileInfo.FullName)
{
return fileInfo.Exists && (DateTime.Now - fileInfo.CreationTime).TotalMilliseconds < _maxAge;
}
}
/// <summary>
/// Returns a file info object for a given tile.
/// </summary>
/// <param name="tile">The tile.</param>
/// <param name="scale">The scale.</param>
/// <param name="type">The type of image.</param>
/// <returns></returns>
private FileInfo GetTileFile(Tile tile, int scale, ImageType type)
{
string extension = string.Empty;
switch (type)
{
case ImageType.Png:
extension = ".png";
break;
case ImageType.Bmp:
extension = ".bmp";
break;
case ImageType.Jpeg:
extension = ".jpg";
break;
}
if(scale != 0)
{ // add scale if needed.
extension = string.Format("{0}x", scale) + extension;
}
return new FileInfo(Path.Combine(_cacheDir.FullName, tile.Zoom.ToString(), tile.X.ToInvariantString(), tile.Y.ToInvariantString() + extension));
}
/// <summary>
/// Writes a new file to cache.
/// </summary>
/// <param name="tile"></param>
/// <param name="scale"></param>
/// <param name="type"></param>
/// <param name="image"></param>
public void Write(Tile tile, int scale, ImageType type, Stream image)
{
var fileInfo = this.GetTileFile(tile, scale, type);
lock (fileInfo.FullName)
{
if (fileInfo.Exists)
{
fileInfo.Delete();
}
if (!fileInfo.Directory.Exists)
{
fileInfo.Directory.Create();
}
using (var outputStream = fileInfo.OpenWrite())
{
CopyStream(image, outputStream);
}
}
}
/// <summary>
/// Tries to get a tile and returns true if successfull.
/// </summary>
/// <param name="tile"></param>
/// <param name="scale"></param>
/// <param name="type"></param>
/// <param name="image"></param>
/// <returns></returns>
public bool TryGet(Tile tile, int scale, ImageType type, out Stream image)
{
var fileInfo = this.GetTileFile(tile, scale, type);
lock (fileInfo.FullName)
{
image = null;
if (fileInfo.Exists && (DateTime.Now - fileInfo.CreationTime).TotalMilliseconds < _maxAge)
{
using (var fileStream = fileInfo.OpenRead())
{
image = new MemoryStream();
CopyStream(fileStream, image);
image.Seek(0, SeekOrigin.Begin);
}
return true;
}
return false;
}
}
/// <summary>
/// Adds the given tile as the best tile for the given tileId.
/// </summary>
/// <param name="tileId"></param>
/// <param name="tile"></param>
private void Add(ulong tileId, Tile tile)
{
HashSet<Tile> tilesSet;
if (!_tilesIndex.TryGetValue(tileId, out tilesSet))
{ // create the tiles set.
tilesSet = new HashSet<Tile>();
_tilesIndex.Add(tileId, tilesSet);
}
tilesSet.Add(tile);
}
/// <summary>
/// Returns true if this tile overlaps the given tile.
/// </summary>
/// <param name="tile"></param>
/// <returns></returns>
public bool Overlaps(Tile tile)
{
if (tile == null) { throw new ArgumentNullException("tile"); }
if (tile.Zoom == this.Zoom)
{ // only overlaps when identical.
return tile.Equals(this);
}
else if (tile.Zoom > this.Zoom)
{ // the zoom is bigger.
var range = this.GetSubTiles(tile.Zoom);
return range.Contains(tile);
}
return false;
}
/// <summary>
/// Returns a tile for the given zoom, x and y.
/// </summary>
/// <param name="x"></param>
/// <param name="y"></param>
/// <param name="zoom"></param>
/// <param name="scale">Scale parameter, 1 = 256, 2 = 512, ...</param>
/// <param name="type"></param>
/// <returns></returns>
public virtual Stream Get(int x, int y, ushort zoom, int scale, ImageType type = ImageType.Png)
{
Stream cachedImage;
var tile = new Tile(x, y, zoom);
if (_cache != null &&
_cache.TryGet(tile, scale, type, out cachedImage))
{ // read from cache.
OsmSharp.Logging.Log.TraceEvent("RenderingInstance", OsmSharp.Logging.TraceEventType.Information,
string.Format("Returning cached image @ {0}", tile.ToInvariantString()));
return cachedImage;
}
var renderedImage = this.Render(x, y, scale, zoom, type);
if(_cache != null)
{ // cache image.
_cache.Write(tile, scale, type, renderedImage);
renderedImage.Seek(0, SeekOrigin.Begin);
}
OsmSharp.Logging.Log.TraceEvent("RenderingInstance", OsmSharp.Logging.TraceEventType.Information,
string.Format("Rendered new image @ {0}", tile.ToInvariantString()));
return renderedImage;
}
/// <summary>
/// Returns all data within the given tile
/// </summary>
/// <param name="tile">The tile to fetch geometries from</param>
/// <param name="filter">Filtering options for the results</param>
/// <returns>An OsmGeoCollection object containing the data within the given tile</returns>
public virtual OsmGeoCollection GetCollection(Tile tile, Filter filter)
{
throw new NotImplementedException();
}