Version 4.10.0: Updated target framework versions. Cleanup of TypeConverters, ImageLoader, MBTileSource.

MapControl/Shared/ImageLoader.cs

@@ -0,0 +1,69 @@
+// XAML Map Control - https://github.com/ClemensFischer/XAML-Map-Control
+// © 2018 Clemens Fischer
+// Licensed under the Microsoft Public License (Ms-PL)
+
+using System;
+using System.Diagnostics;
+using System.Threading.Tasks;
+#if WINDOWS_UWP
+using Windows.Web.Http;
+using Windows.UI.Xaml.Media;
+using Windows.UI.Xaml.Media.Imaging;
+#else
+using System.Net.Http;
+using System.Windows.Media;
+using System.Windows.Media.Imaging;
+#endif
+
+namespace MapControl
+{
+    public static partial class ImageLoader
+    {
+        /// <summary>
+        /// The HttpClient instance used when image data is downloaded from a web resource.
+        /// </summary>
+        public static HttpClient HttpClient { get; set; } = new HttpClient();
+
+        public static async Task<ImageSource> LoadImageAsync(Uri uri, bool isTileImage)
+        {
+            ImageSource imageSource = null;
+
+            if (!uri.IsAbsoluteUri || uri.Scheme == "file")
+            {
+                imageSource = await LoadLocalImageAsync(uri);
+            }
+            else if (uri.Scheme == "http")
+            {
+                imageSource = await LoadHttpImageAsync(uri, isTileImage);
+            }
+            else
+            {
+                imageSource = new BitmapImage(uri);
+            }
+
+            return imageSource;
+        }
+
+        public static async Task<ImageSource> LoadHttpImageAsync(Uri uri, bool isTileImage)
+        {
+            ImageSource imageSource = null;
+
+            using (var response = await HttpClient.GetAsync(uri))
+            {
+                if (!response.IsSuccessStatusCode)
+                {
+                    Debug.WriteLine("ImageLoader: {0}: {1} {2}", uri, (int)response.StatusCode, response.ReasonPhrase);
+                }
+                else if (!isTileImage || IsTileAvailable(response.Headers))
+                {
+                    using (var stream = await GetResponseStreamAsync(response.Content))
+                    {
+                        imageSource = await CreateImageSourceAsync(stream);
+                    }
+                }
+
+                return imageSource;
+            }
+        }
+    }
+}