private async Task<IRandomAccessStream> ResizeStreamAsync(IRandomAccessStream stream, Size size, PhotoOrientation orientation) { var rotation = 0; switch (orientation) { case PhotoOrientation.Rotate180: { rotation = -180; }; break; case PhotoOrientation.Rotate270: { rotation = -270; }; break; case PhotoOrientation.Rotate90: { rotation = -90; }; break; } using (var resizedStream = new InMemoryRandomAccessStream()) { var buffer = new byte[stream.Size].AsBuffer(); stream.Seek(0); await stream.ReadAsync(buffer, buffer.Length, InputStreamOptions.None); var resizeConfiguration = new AutoResizeConfiguration( (uint)(size.Width * size.Height * 4 * 2), size, new Size(0, 0), AutoResizeMode.Automatic, 0.7, ColorSpace.Yuv420); buffer = await JpegTools.AutoResizeAsync(buffer, resizeConfiguration); await resizedStream.WriteAsync(buffer); await resizedStream.FlushAsync(); if (rotation != 0) { resizedStream.Seek(0); var filters = new List<IFilter>() { new RotationFilter(rotation) }; using (var source = new RandomAccessStreamImageSource(resizedStream)) using (var effect = new FilterEffect(source) { Filters = filters }) using (var renderer = new JpegRenderer(effect)) { buffer = await renderer.RenderAsync(); using (var rotatedResizedStream = new InMemoryRandomAccessStream()) { await rotatedResizedStream.WriteAsync(buffer); await rotatedResizedStream.FlushAsync(); return rotatedResizedStream.CloneStream(); } } } else { return resizedStream.CloneStream(); } } }
private async void SendInk() { if (!this.isConnect) return; InMemoryRandomAccessStream randomAccessStream = new InMemoryRandomAccessStream(); await inkCanvas.InkPresenter.StrokeContainer.SaveAsync(randomAccessStream); Stream stream = randomAccessStream.CloneStream().AsStream(); byte[] data = new byte[stream.Length]; stream.Read(data, 0, (int)stream.Length); SendData(data); }
private async Task<IRandomAccessStream> GetThumbnailStreamAsync() { #if DEBUG System.Diagnostics.Debug.WriteLine("GetThumbnailStreamAsync invoked " + this.GetHashCode()); #endif var maximumSide = (int)Windows.UI.Xaml.Application.Current.Resources["ThumbnailSide"]; var orientation = await GetPhotoOrientationAsync(); var orientationValue = orientation.HasValue ? orientation.Value : PhotoOrientation.Unspecified; #if WINDOWS_PHONE_APP // TODO Getting platform thumbnails is currently broken in the WP8.1 preview SDK, // thus generating thumbnails from the large original photos. Change to platform // thumbnails again when platform is live & fine. var size = await GetPhotoResolutionAsync(); using (var stream = await GetPhotoAsync()) { return await ResizeStreamAsync(stream, new Size(maximumSide, maximumSide), orientationValue); } #else using (var stream = await _file.GetThumbnailAsync(Windows.Storage.FileProperties.ThumbnailMode.PicturesView)) { if (stream.ContentType == "image/jpeg") { if (stream.OriginalWidth <= maximumSide || stream.OriginalHeight <= maximumSide) { using (var memoryStream = new InMemoryRandomAccessStream()) { using (var reader = new DataReader(stream)) using (var writer = new DataWriter(memoryStream)) { await reader.LoadAsync((uint)stream.Size); var buffer = reader.ReadBuffer((uint)stream.Size); writer.WriteBuffer(buffer); await writer.StoreAsync(); await writer.FlushAsync(); return memoryStream.CloneStream(); } } } else { return await ResizeStreamAsync(stream, new Size(maximumSide, maximumSide), orientationValue); } } else { using (var preview = await GetPreviewAsync()) { return await ResizeStreamAsync(preview, new Size(maximumSide, maximumSide), orientationValue); } } } #endif }