void BitmapRequested(CustomMapTileDataSource sender, MapTileBitmapRequestedEventArgs args)
{
var deferral = args.Request.GetDeferral();
IRandomAccessStreamReference referenceStream;
double lat, lon = 0;
int pixelX, pixelY = 0;
Microsoft.MapPoint.TileSystem.TileXYToPixelXY(args.X, args.Y, out pixelX, out pixelY);
Microsoft.MapPoint.TileSystem.PixelXYToLatLong(pixelX, pixelY, args.ZoomLevel, out lat, out lon);
BasicGeoposition northWest = new BasicGeoposition {
Latitude = lat, Longitude = lon
};
Microsoft.MapPoint.TileSystem.PixelXYToLatLong(pixelX + (int)sizeOfMapTile, pixelY + (int)sizeOfMapTile, args.ZoomLevel, out lat, out lon);
BasicGeoposition southEast = new BasicGeoposition {
Latitude = lat, Longitude = lon
};
GeoboundingBox tileBox = new GeoboundingBox(northWest, southEast);
if (tileBox.CollidesWith(PathBox))
{
if (PathCache.pointInPolygon(northWest.Longitude, northWest.Latitude) &&
PathCache.pointInPolygon(southEast.Longitude, southEast.Latitude) &&
PathCache.pointInPolygon(northWest.Longitude, southEast.Latitude) &&
PathCache.pointInPolygon(southEast.Longitude, northWest.Latitude))
{
referenceStream = RandomAccessStreamReference.CreateFromStream(InTile);
}
else
{
var cutter = new Windows.Storage.Streams.InMemoryRandomAccessStream();
cutTile(cutter, pixelX, pixelY, args.ZoomLevel);
referenceStream = RandomAccessStreamReference.CreateFromStream(cutter);
}
}
else
{
referenceStream = RandomAccessStreamReference.CreateFromStream(OutTile);
}
args.Request.PixelData = referenceStream;
deferral.Complete();
}
