public VectorMbTilesProvider(string path, string stylePath, string cachePath)
{
this.cachePath = cachePath;
style = new Style(stylePath);
style.FontFallbackDirectory = @"styles/fonts/";
provider = new VectorTileRenderer.Sources.MbTilesSource(path);
style.SetSourceProvider(0, provider);
}
public VectorMbTilesProvider(string path, string stylePath, string cachePath)
{
style = new Style(stylePath);
style.FontDirectory = @"styles/fonts/";
this.cachePath = cachePath;
provider = new VectorTileRenderer.Sources.MbTilesSource(path);
style.SetSourceProvider(0, provider);
this.BypassCache = true;
}
public MainWindow()
{
InitializeComponent();
// first, we extract necessary pbf tiles from mbtiles db
var coords = gmt.LatLonToTile(47.371143, 8.543924, 14);
var tileSource = new VectorTileRenderer.Sources.MbTilesSource(mainDir + @"tiles/zurich.mbtiles");
tileSource.ExtractTile(coords.X, coords.Y, 14, mainDir + @"tiles/zurich.pbf.gz");
coords = gmt.LatLonToTile(33.693189, 73.061415, 11);
tileSource = new VectorTileRenderer.Sources.MbTilesSource(mainDir + @"tiles/islamabad.mbtiles");
tileSource.ExtractTile(coords.X, coords.Y, 11, mainDir + @"tiles/islamabad.pbf.gz");
}
async void showMbTiles(string path, string stylePath, int minX, int minY, int maxX, int maxY, int zoom, double size = 512, double scale = 1)
{
var watch = System.Diagnostics.Stopwatch.StartNew();
// load style and font
var style = new VectorTileRenderer.Style(stylePath);
style.FontDirectory = mainDir + @"styles/fonts/";
// set pbf as tile provider
var provider = new VectorTileRenderer.Sources.MbTilesSource(path);
style.SetSourceProvider(0, provider);
BitmapSource[,] bitmapSources = new BitmapSource[maxX - minX + 1, maxY - minY + 1];
// loop through tiles and render them
Parallel.For(minX, maxX + 1, (int x) =>
{
Parallel.For(minY, maxY + 1, async(int y) =>
{
var canvas = new SkiaCanvas();
var bitmapR = await Renderer.Render(style, canvas, x, y, zoom, size, size, scale);
if (bitmapR == null)
{
}
bitmapSources[x - minX, maxY - y] = bitmapR;
});
});
// merge the tiles and show it
var bitmap = mergeBitmaps(bitmapSources);
demoImage.Source = bitmap;
scrollViewer.Background = new SolidColorBrush(style.GetBackgroundColor(zoom));
watch.Stop();
var elapsedMs = watch.ElapsedMilliseconds;
Console.WriteLine(elapsedMs + "ms time");
}
