public async Task <string> GetThumbnail(IRandomAccessStream stream, string filename, int width = 250, int height = 250)
{
byte[] thumbnailData = null;
var success = false;
while (!success)
{
try
{
thumbnailData = await _client.GetThumbnailAsync(stream.AsStream(), width, height);
success = true;
}
catch (Exception ex)
{
// wait out the limitation in the API
await Task.Delay(TimeSpan.FromSeconds(60));
}
}
var file = await(await AdventureObjectStorageHelper.GetDataSaveFolder()).CreateFileAsync(filename, CreationCollisionOption.GenerateUniqueName);
using (var writeStream = await file.OpenAsync(FileAccessMode.ReadWrite))
{
await writeStream.WriteAsync(thumbnailData.AsBuffer());
}
return(file.Path);
}
private async Task <MyData> LoadDummyData()
{
var file = await StorageFile.GetFileFromApplicationUriAsync(new Uri("ms-appx:///Data/data.json"));
await file.CopyAsync(await AdventureObjectStorageHelper.GetDataSaveFolder(), _filename, NameCollisionOption.ReplaceExisting);
var data = await _localStorageService.ReadFileAsync <MyData>(_filename);
return(data);
}
public async static Task <string> SaveInkToFile(this InkCanvas inker, string filename)
{
if (inker == null || inker.InkPresenter.StrokeContainer.GetStrokes().Count == 0)
{
return(null);
}
var file = await(await AdventureObjectStorageHelper.GetDataSaveFolder()).CreateFileAsync(filename, CreationCollisionOption.ReplaceExisting);
if (file == null)
{
return(null);
}
using (var outputStream = await file.OpenAsync(FileAccessMode.ReadWrite))
{
await inker.InkPresenter.StrokeContainer.SaveAsync(outputStream);
}
return(file.Path);
}
public static async Task <string> RenderImageWithInkToFileAsync(InkCanvas inker, IRandomAccessStream imageStream, string filename)
{
if (inker.InkPresenter.StrokeContainer.GetStrokes().Count == 0)
{
return(null);
}
CanvasDevice device = CanvasDevice.GetSharedDevice();
CanvasRenderTarget renderTarget = new CanvasRenderTarget(device, (int)inker.ActualWidth, (int)inker.ActualHeight, 96);
var image = await CanvasBitmap.LoadAsync(device, imageStream);
using (var ds = renderTarget.CreateDrawingSession())
{
var imageBounds = image.GetBounds(device);
var min = Math.Min(imageBounds.Height, imageBounds.Width);
imageBounds.X = (imageBounds.Width - min) / 2;
imageBounds.Y = (imageBounds.Height - min) / 2;
imageBounds.Height = min;
imageBounds.Width = min;
ds.Clear(Colors.White);
ds.DrawImage(image, new Rect(0, 0, inker.ActualWidth, inker.ActualWidth), imageBounds);
ds.DrawInk(inker.InkPresenter.StrokeContainer.GetStrokes());
}
var file = await(await AdventureObjectStorageHelper.GetDataSaveFolder()).CreateFileAsync(filename, CreationCollisionOption.ReplaceExisting);
using (var stream = await file.OpenAsync(FileAccessMode.ReadWrite))
{
await renderTarget.SaveAsync(stream, CanvasBitmapFileFormat.Jpeg, 1f);
}
return(file.Path);
}