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author | Jason Smith <jason.smith@xamarin.com> | 2016-03-22 13:02:25 -0700 |
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committer | Jason Smith <jason.smith@xamarin.com> | 2016-03-22 16:13:41 -0700 |
commit | 17fdde66d94155fc62a034fa6658995bef6fd6e5 (patch) | |
tree | b5e5073a2a7b15cdbe826faa5c763e270a505729 /Xamarin.Forms.Platform.WinRT/ImageLoaderSourceHandler.cs | |
download | xamarin-forms-17fdde66d94155fc62a034fa6658995bef6fd6e5.tar.gz xamarin-forms-17fdde66d94155fc62a034fa6658995bef6fd6e5.tar.bz2 xamarin-forms-17fdde66d94155fc62a034fa6658995bef6fd6e5.zip |
Initial import
Diffstat (limited to 'Xamarin.Forms.Platform.WinRT/ImageLoaderSourceHandler.cs')
-rw-r--r-- | Xamarin.Forms.Platform.WinRT/ImageLoaderSourceHandler.cs | 52 |
1 files changed, 52 insertions, 0 deletions
diff --git a/Xamarin.Forms.Platform.WinRT/ImageLoaderSourceHandler.cs b/Xamarin.Forms.Platform.WinRT/ImageLoaderSourceHandler.cs new file mode 100644 index 00000000..c9c711e0 --- /dev/null +++ b/Xamarin.Forms.Platform.WinRT/ImageLoaderSourceHandler.cs @@ -0,0 +1,52 @@ +using System; +using System.Diagnostics; +using System.IO; +using System.Threading; +using System.Threading.Tasks; +using Windows.Storage.Streams; +using Windows.UI.Xaml.Media.Imaging; + +#if WINDOWS_UWP + +namespace Xamarin.Forms.Platform.UWP +#else + +namespace Xamarin.Forms.Platform.WinRT +#endif +{ + public sealed class ImageLoaderSourceHandler : IImageSourceHandler + { + public async Task<Windows.UI.Xaml.Media.ImageSource> LoadImageAsync(ImageSource imagesoure, CancellationToken cancellationToken = new CancellationToken()) + { + var imageLoader = imagesoure as UriImageSource; + if (imageLoader?.Uri == null) + return null; + + Stream streamImage = await imageLoader.GetStreamAsync(cancellationToken); + if (streamImage == null || !streamImage.CanRead) + { + return null; + } + + using(IRandomAccessStream stream = streamImage.AsRandomAccessStream()) + { + try + { + var image = new BitmapImage(); + await image.SetSourceAsync(stream); + return image; + } + catch (Exception ex) + { + Debug.WriteLine(ex); + + // Because this literally throws System.Exception + // According to https://msdn.microsoft.com/library/windows/apps/jj191522 + // this can happen if the image data is bad or the app is close to its + // memory limit + return null; + } + } + } + } +}
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