Updated MapsforgeTiles

MapsforgeTiles/WinUI/MapsforgeTileSource.cs

@@ -0,0 +1,49 @@
+using System;
+using System.IO;
+using System.Runtime.InteropServices.WindowsRuntime;
+using System.Threading.Tasks;
+using MapsforgeWrapper;
+#if UWP
+using Windows.UI.Xaml.Media;
+using Windows.UI.Xaml.Media.Imaging;
+#elif WINUI
+using Microsoft.UI.Xaml.Media;
+using Microsoft.UI.Xaml.Media.Imaging;
+#endif
+
+namespace MapControl.MapsforgeTiles
+{
+    public class MapsforgeTileSource(string theme, int cacheCapacity = 200) : TileSource
+    {
+        private readonly TileRenderer renderer = new(theme, cacheCapacity);
+
+        public static void Initialize(string mapFilePath, float dpiScale)
+        {
+            TileRenderer.Initialize(mapFilePath, dpiScale);
+        }
+
+        public override Task<ImageSource> LoadImageAsync(int zoomLevel, int column, int row)
+        {
+            var pixels = renderer.RenderTile(zoomLevel, column, row);
+            ImageSource image = pixels != null ? CreateImage(pixels) : null;
+
+            return Task.FromResult(image);
+        }
+
+        private static WriteableBitmap CreateImage(int[] pixels)
+        {
+            var size = (int)Math.Sqrt(pixels.Length);
+            var bitmap = new WriteableBitmap(size, size);
+
+            using var stream = bitmap.PixelBuffer.AsStream();
+            using var writer = new BinaryWriter(stream);
+
+            foreach (var pixel in pixels)
+            {
+                writer.Write(pixel);
+            }
+
+            return bitmap;
+        }
+    }
+}