private static async Task <Stream> GetPhotoStreamAsync(MediaCapture mediaCapture)
{
InMemoryRandomAccessStream photoStream = new InMemoryRandomAccessStream();
await mediaCapture.CapturePhotoToStreamAsync(ImageEncodingProperties.CreateJpeg(), photoStream);
photoStream.AsStreamForRead().Seek(0, SeekOrigin.Begin);
return(photoStream.AsStreamForRead());
}
internal async Task <Stream> PlatformOpenReadAsync(ScreenshotFormat format)
{
if (bytes == null)
{
var pixels = await bmp.GetPixelsAsync().AsTask().ConfigureAwait(false);
bytes = pixels.ToArray();
}
var f = format switch
{
ScreenshotFormat.Jpeg => BitmapEncoder.JpegEncoderId,
_ => BitmapEncoder.PngEncoderId
};
var ms = new InMemoryRandomAccessStream();
var encoder = await BitmapEncoder.CreateAsync(f, ms).AsTask().ConfigureAwait(false);
encoder.SetPixelData(BitmapPixelFormat.Bgra8, BitmapAlphaMode.Ignore, (uint)Width, (uint)Height, 96, 96, bytes);
await encoder.FlushAsync().AsTask().ConfigureAwait(false);
return(ms.AsStreamForRead());
}
}
/// <inheritdoc/>
public override async Task <(Stream stream, Exception error)> OpenEntryAsync(string entry)
{
var(irs, error) = await this.OpenEntryAsRandomAccessStreamAsync(entry);
if (error != null)
{
return(null, error);
}
var decoder = await BitmapDecoder.CreateAsync(irs);
var bitmap = decoder.GetSoftwareBitmapAsync();
var outputIrs = new InMemoryRandomAccessStream();
var encoder = await BitmapEncoder.CreateAsync(BitmapEncoder.PngEncoderId, outputIrs);
encoder.SetSoftwareBitmap(await bitmap);
await encoder.FlushAsync();
var outputStream = new MemoryStream();
outputIrs.Seek(0);
outputIrs.AsStreamForRead().CopyTo(outputStream);
outputIrs.Dispose();
outputStream.Seek(0, SeekOrigin.Begin);
return(outputStream, null);
}
public async Task <Stream> GetCurrentFrameAsync()
{
if (CurrentState != ScenarioState.Streaming)
{
return(null);
}
// If a lock is being held it means we're still waiting for processing work on the previous frame to complete.
// In this situation, don't wait on the semaphore but exit immediately.
if (!frameProcessingSemaphore.Wait(0))
{
return(null);
}
try
{
var stream = new InMemoryRandomAccessStream();
await mediaCapture.CapturePhotoToStreamAsync(ImageEncodingProperties.CreateJpeg(), stream);
stream.Seek(0);
return(stream.AsStreamForRead());
}
catch
{
}
finally
{
frameProcessingSemaphore.Release();
}
return(null);
}
private async Task <IDictionary <string, float> > GetPredictionFromServiceAsync(IList <InkStroke> strokes)
{
var bitmap = strokes.DrawInk();
using (IRandomAccessStream stream = new InMemoryRandomAccessStream())
{
BitmapEncoder encoder = await BitmapEncoder.CreateAsync(BitmapEncoder.JpegEncoderId, stream);
encoder.SetSoftwareBitmap(bitmap);
encoder.BitmapTransform.InterpolationMode = BitmapInterpolationMode.Fant;
try
{
await encoder.FlushAsync();
var result = await _prediction.GetPredictionAsync(stream.AsStreamForRead(), _state.CurrentProject.Id, SelectedIteration.Id);
return(result);
}
catch (Exception err)
{
return(null);
}
}
}
public async Task <byte[]> CaptureAsync()
{
var rtb = new RenderTargetBitmap();
await rtb.RenderAsync(Window.Current.Content);
var pixelBuffer = await rtb.GetPixelsAsync();
byte[] pixels;
CryptographicBuffer.CopyToByteArray(pixelBuffer, out pixels);
// Useful for rendering in the correct DPI
var displayInformation = DisplayInformation.GetForCurrentView();
var stream = new InMemoryRandomAccessStream();
var encoder = await BitmapEncoder.CreateAsync(BitmapEncoder.JpegEncoderId, stream);
encoder.SetPixelData(BitmapPixelFormat.Bgra8,
BitmapAlphaMode.Premultiplied,
(uint)rtb.PixelWidth,
(uint)rtb.PixelHeight,
displayInformation.RawDpiX,
displayInformation.RawDpiY,
pixels);
await encoder.FlushAsync();
stream.Seek(0);
var readStram = stream.AsStreamForRead();
var bytes = new byte[readStram.Length];
readStram.Read(bytes, 0, bytes.Length);
return(bytes);
}
public async Task <Stream> PickImage(ImageLocation location = ImageLocation.All, int maxSize = int.MaxValue)
{
var raw = await PickImageRaw(location);
if (raw == null)
{
return(null);
}
using (var stream = await raw.OpenReadAsync())
{
var decoder = await BitmapDecoder.CreateAsync(stream);
var size = MediaHelper.Crop((int)decoder.PixelWidth, (int)decoder.PixelHeight, maxSize);
if (size.Item1 != decoder.PixelWidth || size.Item2 != decoder.PixelHeight)
{
var ms = new InMemoryRandomAccessStream();
var encoder = await BitmapEncoder.CreateForTranscodingAsync(ms, decoder);
encoder.BitmapTransform.ScaledWidth = (uint)size.Item1;
encoder.BitmapTransform.ScaledHeight = (uint)size.Item2;
await encoder.FlushAsync();
return(ms.AsStreamForRead());
}
}
return(await raw.OpenStreamForReadAsync());
}
// encodes bytes into a b64 string in png format, must also specify height and width
public static async Task <string> EncodeBytesToPNGString(byte[] bytes, uint width, uint height)
{
using (IRandomAccessStream destStream = new InMemoryRandomAccessStream())
{
// encoder, assumes input bytes are Bgra8
var encoder = await BitmapEncoder.CreateAsync(BitmapEncoder.PngEncoderId, destStream);
encoder.SetPixelData(
BitmapPixelFormat.Bgra8,
BitmapAlphaMode.Straight,
width,
height,
96,
96,
bytes
);
// encode
await encoder.FlushAsync();
// convert the stream to bytes
byte[] encodedBytes = new byte[destStream.Size];
destStream.AsStreamForRead().Read(encodedBytes, 0, (int)destStream.Size);
// and finally encode the bytes to a string
return(Convert.ToBase64String(encodedBytes.ToArray()));
}
}
/// <summary>
/// Convert WriteableBitmap to byte
/// </summary>
/// <param name="writeableBitmap"></param>
/// <returns></returns>
public async static Task <byte[]> GetPhotoBytesAsync(this WriteableBitmap writeableBitmap)
{
if (writeableBitmap == null)
{
return new byte[0] {
}
}
;
Stream stream = writeableBitmap.PixelBuffer.AsStream();
byte[] pixels = new byte[stream.Length];
await stream.ReadAsync(pixels, 0, pixels.Length);
ConvertToRGBA(writeableBitmap.PixelHeight, writeableBitmap.PixelWidth, pixels);
InMemoryRandomAccessStream ims = new InMemoryRandomAccessStream();
var imsWriter = ims.AsStreamForWrite();
await Task.Factory.StartNew(() => stream.CopyTo(imsWriter));
stream.Flush();
stream.Dispose();
BitmapEncoder encoder = await BitmapEncoder.CreateAsync(BitmapEncoder.JpegEncoderId, ims);
encoder.SetPixelData(BitmapPixelFormat.Rgba8, BitmapAlphaMode.Premultiplied, (uint)writeableBitmap.PixelWidth, (uint)writeableBitmap.PixelHeight, 96, 96, pixels);
await encoder.FlushAsync();
stream = ims.AsStreamForRead();
byte[] pixeBuffer = new byte[ims.Size];
await stream.ReadAsync(pixeBuffer, 0, pixeBuffer.Length);
stream.Flush();
stream.Dispose();
return(pixeBuffer);
}
async Task <Stream> PlatformOpenReadAsync(ScreenshotFormat format, int quality)
{
var ms = new InMemoryRandomAccessStream();
await EncodeAsync(format, ms).ConfigureAwait(false);
return(ms.AsStreamForRead());
}
private async Task <Dictionary <TimeSpan, Face[]> > DetectFace_Video(StorageFile fileData)
{
// Process configs
const int frameJumpSize = 15;
const int frameQuota = 20;
const int frameTimeout = 60_000;
// Video
var videoProperties = await fileData.Properties.GetVideoPropertiesAsync();
var videoTime = TimeSpan.FromSeconds(0);
var videoFrame = 0;
// DetectedFaces
var detectedFaces = new Dictionary <TimeSpan, Face[]>();
// Process every frame
while (videoTime < videoProperties.Duration)
{
// Frame cut
var mediaClip = await MediaClip.CreateFromFileAsync(fileData);
var mediaComposition = new MediaComposition();
mediaComposition.Clips.Add(mediaClip);
var frame = await mediaComposition.GetThumbnailAsync(
videoTime,
0,
0,
VideoFramePrecision.NearestFrame
);
// Stream conversion
var randomAccessStream = new InMemoryRandomAccessStream();
await RandomAccessStream.CopyAsync(frame, randomAccessStream);
randomAccessStream.Seek(0);
// Process and add image
var detectedFace = await DetectFace_Image(randomAccessStream.AsStreamForRead());
if (detectedFace != null)
{
detectedFaces.Add(videoTime, detectedFace);
}
// Quota overflow
if (videoFrame != 0 && videoFrame % frameQuota == 0)
{
await Task.Delay(frameTimeout);
}
// Frame and time incrementation
videoTime += TimeSpan.FromSeconds(frameJumpSize);
videoFrame += 1;
}
return(detectedFaces);
}
internal static async Task <Stream> GetStreamFromVideoFrameAsync(VideoFrame frame)
{
InMemoryRandomAccessStream stream = new InMemoryRandomAccessStream();
BitmapEncoder encoder = await BitmapEncoder.CreateAsync(BitmapEncoder.JpegEncoderId, stream);
encoder.SetSoftwareBitmap(frame.SoftwareBitmap);
await encoder.FlushAsync();
return(stream.AsStreamForRead());
}
// TODO: in x64 Release mode doesn't work
// with the current SixLabors.ImageSharp.Drawing beta version
//public Image<Rgba32> SearchAndReplace(Image<Rgba32> masterImage, int ratio = 5)
//{
// var text = GenerateText(masterImage, ratio);
// var font = SystemFonts.CreateFont("Courier New", 14);
// var size = TextMeasurer.Measure(text, new RendererOptions(font));
// var finalImage = new Image<Rgba32>((int)size.Width, (int)size.Height);
// finalImage.Mutate(i =>
// {
// i.Fill(Color.White);
// i.DrawText(text, font, Color.Black, new PointF(0, 0));
// });
// return finalImage;
//}
private async Task <Image <Rgba32> > Generate(CanvasRenderTarget renderTarget)
{
Image <Rgba32> finalImage;
IRandomAccessStream inputRandomAccessStream = new InMemoryRandomAccessStream();
await renderTarget.SaveAsync(inputRandomAccessStream, CanvasBitmapFileFormat.Png);
finalImage = Image.Load <Rgba32>(inputRandomAccessStream.AsStreamForRead());
return(finalImage);
}
public static async Task <string> ToBase64String(this CanvasBitmap bitmap)
{
using var ms = new InMemoryRandomAccessStream();
await bitmap.SaveAsync(ms, CanvasBitmapFileFormat.Png);
using var ms2 = new MemoryStream();
await ms.AsStreamForRead().CopyToAsync(ms2);
return(Convert.ToBase64String(ms2.ToArray()));
}
public Stream CompressBitmap(byte[] data, int w, int h)
{
var memStream = new InMemoryRandomAccessStream();
Encode(data, (uint)w, (uint)h, memStream);
var stream = memStream.AsStreamForRead();
Logger($"Log Encode stream for bugfix:{memStream.Size} => {stream.Length} bytes");
return(stream);
}
public void WriteJpeg(InMemoryRandomAccessStream imageStream)
{
Write("Content-Length: " + imageStream.Size.ToString() + "\r\n\r\n");
Stream s = imageStream.AsStreamForRead();
s.Position = 0;
s.CopyTo(_httpSocketStream);
_httpSocketStream.Flush();
_httpSocketStream.Close();
}
/// <summary>
/// Handle a face detected event
/// </summary>
/// <param name="sender"></param>
/// <param name="args"></param>
private async void FaceDetectionEffect_FaceDetected(FaceDetectionEffect sender, FaceDetectedEventArgs args)
{
// Only run one face detection call to Cognitive Services at a time
if (!_isRecognizing)
{
//If we need the box for the detected face we can get them here
//foreach (Windows.Media.FaceAnalysis.DetectedFace face in args.ResultFrame.DetectedFaces)
//{
// BitmapBounds faceRect = face.FaceBox;
//}
_isRecognizing = true;
var lowLagCapture = await _mediaCapture.PrepareLowLagPhotoCaptureAsync(ImageEncodingProperties.CreateUncompressed(MediaPixelFormat.Bgra8));
var capturedPhoto = await lowLagCapture.CaptureAsync();
var softwareBitmap = capturedPhoto.Frame.SoftwareBitmap;
await lowLagCapture.FinishAsync();
using (IRandomAccessStream randomAccessStream = new InMemoryRandomAccessStream())
{
BitmapEncoder encoder = await BitmapEncoder.CreateAsync(BitmapEncoder.JpegEncoderId, randomAccessStream);
encoder.SetSoftwareBitmap(softwareBitmap);
await encoder.FlushAsync();
var stream = randomAccessStream.AsStreamForRead();
try
{
//This call the Cognitive Services face API to detect the faces
var faces = await FaceService.DetectAsync(stream, true, false);
List <Guid> faceList = new List <Guid>();
foreach (var face in faces)
{
faceList.Add(face.FaceId);
}
LastFaces = faceList.ToArray();
}
catch
{
//We could not detect faces using Cognitive Services
}
}
_isRecognizing = false;
}
}
public static async Task LoadImages()
{
double dpiMultiplier = Windows.Graphics.Display.DisplayInformation.GetForCurrentView().LogicalDpi / 96.0;
for (int i = 0; i < NUM_ICON_SIZES; i++)
{
for (int j = 0; j < NUM_ICON_TYPES; j++)
{
//string postfix;
//if (j >= 1 && j <= 8)
// postfix = "BusDirection" + ((StopDirection)j).ToString();
//else if (j == 0)
// postfix = "BusBase";
//else
// postfix = j == 9 ? "BusAlert" : "BusClosed";
//postfix += (i == 0 ? "20" : "40");
//var sprite = new Sprite() { ImageUri = new Uri($"ms-appx:///Assets/Icons/{postfix}.png") };
//await sprite.Load();
//sprite.Unlock();
//var buffer1 = new SpriteBitmapStream(sprite).GetFullBuffer();
//using (MemoryStream stream1 = new MemoryStream(buffer1, true))
//{
// BusIconStreams[i * NUM_ICON_TYPES + j] = stream1.AsRandomAccessStream();
//}
//var bitmap = await WriteableBitmapExtensions.FromContent(null, new Uri($"ms-appx:///Assets/Icons/{postfix}.png"));
WriteableBitmap bitmap;
if (j >= 1 && j <= 8)
{
bitmap = await MapIconImageGenerator.GenerateBusMapIcon((StopDirection)j);
}
else
{
bitmap = await MapIconImageGenerator.GenerateBusMapIcon();
}
double size = (i + 1) * 20 * dpiMultiplier;
bitmap = bitmap.Resize((int)size, (int)size, WriteableBitmapExtensions.Interpolation.Bilinear);
InMemoryRandomAccessStream stream = new InMemoryRandomAccessStream();
await bitmap.ToStream(stream, BitmapEncoder.PngEncoderId);
BusIconStreams[i * NUM_ICON_TYPES + j] = stream;
byte[] buffer = new byte[stream.Size];
stream.AsStreamForRead().Read(buffer, 0, buffer.Length);
for (int k = 0; k < buffer.Length; k++)
{
//if (buffer[k] != buffer1[k])
//{
// //System.Diagnostics.Debug.WriteLine($"{buffer[k]} vs {buffer1[k]}");
//}
}
}
}
}
private async void AnalyzeButton_Click(object sender, RoutedEventArgs e)
{
if (processingImage)
{
// Ignore button presses while processing the image
return;
}
if (inCaptureState)
{
processingImage = true;
inCaptureState = false;
// Make the 'Processing...' label visible
canvasControl.Visibility = Visibility.Visible;
AnalyzeButton.Content = "...";
canvasControl.Invalidate();
var originalPhoto = new InMemoryRandomAccessStream();
var reencodedPhoto = new InMemoryRandomAccessStream();
await mediaCapture.CapturePhotoToStreamAsync(ImageEncodingProperties.CreateJpeg(), originalPhoto);
await originalPhoto.FlushAsync();
originalPhoto.Seek(0);
captureElement.Visibility = Visibility.Collapsed;
// Store the captured photo as a Win2D type for later use
photoCanvasBitmap = await CanvasBitmap.LoadAsync(canvasControl, originalPhoto);
// Send the photo to Project Oxford to detect the faces
lastCapturedFaces = await faceServiceClient.DetectAsync(originalPhoto.AsStreamForRead(), true, true, true, false);
// Force the canvasControl to be redrawn now that the photo is available
canvasControl.Invalidate();
processingImage = false;
AnalyzeButton.Content = "Restart";
}
else
{
canvasControl.Visibility = Visibility.Collapsed;
captureElement.Visibility = Visibility.Visible;
AnalyzeButton.Content = "Capture Photo";
photoCanvasBitmap = null;
canvasControl.Invalidate();
inCaptureState = true;
}
}
// Convert frame from mediacapture into byte array
public async Task <byte[]> CaptureImageToByteArray()
{
var stream = new InMemoryRandomAccessStream();
await _video.CapturePhotoToStreamAsync(ImageEncodingProperties.CreateJpeg(), stream);
stream.Seek(0);
var readStream = stream.AsStreamForRead();
var byteArray = new byte[readStream.Length];
await readStream.ReadAsync(byteArray, 0, byteArray.Length);
return(byteArray);
}
public static async Task <string> CreateColorError(this CanvasBitmap bitmap, string message)
{
using var ms = new InMemoryRandomAccessStream();
await bitmap.SaveAsync(ms, CanvasBitmapFileFormat.Png);
using var ms2 = new MemoryStream();
await ms.AsStreamForRead().CopyToAsync(ms2);
var imageAsString = Convert.ToBase64String(ms2.ToArray());
return($"{message}. This is what it looked like:<img>{imageAsString}</img>");
}
private async Task <Stream> ResizeImage(Stream imageData, int desiredWidth, int desiredHeight, CancellationToken cancellationToken)
{
IRandomAccessStream imageStream = imageData.AsRandomAccessStream();
BitmapDecoder decoder = await BitmapDecoder.CreateAsync(imageStream);
cancellationToken.ThrowIfCancellationRequested();
if (decoder.PixelWidth > desiredWidth || decoder.PixelHeight > desiredHeight)
{
using (imageData)
using (imageStream)
{
InMemoryRandomAccessStream resizedStream = new InMemoryRandomAccessStream();
BitmapEncoder encoder = await BitmapEncoder.CreateForTranscodingAsync(resizedStream, decoder);
cancellationToken.ThrowIfCancellationRequested();
double widthRatio = (double)desiredWidth / decoder.PixelWidth;
double heightRatio = (double)desiredHeight / decoder.PixelHeight;
double scaleRatio = Math.Min(widthRatio, heightRatio);
if (desiredWidth == 0)
{
scaleRatio = heightRatio;
}
if (desiredHeight == 0)
{
scaleRatio = widthRatio;
}
uint aspectHeight = (uint)Math.Floor(decoder.PixelHeight * scaleRatio);
uint aspectWidth = (uint)Math.Floor(decoder.PixelWidth * scaleRatio);
encoder.BitmapTransform.InterpolationMode = BitmapInterpolationMode.Linear;
encoder.BitmapTransform.ScaledHeight = aspectHeight;
encoder.BitmapTransform.ScaledWidth = aspectWidth;
await encoder.FlushAsync();
cancellationToken.ThrowIfCancellationRequested();
resizedStream.Seek(0);
return(resizedStream.AsStreamForRead());
}
}
return(imageData);
}
public static async Task <Image <TColor, TDepth> > FromMediaCapture(MediaCapture _mediaCapture)
{
using (InMemoryRandomAccessStream stream = new InMemoryRandomAccessStream())
{
await _mediaCapture.CapturePhotoToStreamAsync(Windows.Media.MediaProperties.ImageEncodingProperties.CreateJpeg(), stream);
stream.Seek(0);
byte[] data = new byte[stream.Size];
await stream.AsStreamForRead().ReadAsync(data, 0, data.Length);
return(Image <TColor, TDepth> .FromRawImageData(data));
}
}
private static async Task <Bitmap> GetBitmapFromSoftwareBitmap(SoftwareBitmap softwareBitmap)
{
using (IRandomAccessStream ras = new InMemoryRandomAccessStream())
{
BitmapEncoder encoder = await BitmapEncoder.CreateAsync(BitmapEncoder.BmpEncoderId, ras);
encoder.SetSoftwareBitmap(SoftwareBitmap.Convert(softwareBitmap, BitmapPixelFormat.Bgra8));
await encoder.FlushAsync();
Bitmap bmp = new Bitmap(ras.AsStreamForRead());
return(bmp.Clone(new Rectangle(Point.Empty, bmp.Size), PixelFormat.Format32bppArgb));
}
}
public static async Task ToMat(this MediaCapture mediaCapture, Mat result)
{
using (InMemoryRandomAccessStream stream = new InMemoryRandomAccessStream())
{
await mediaCapture.CapturePhotoToStreamAsync(Windows.Media.MediaProperties.ImageEncodingProperties.CreateJpeg(), stream);
stream.Seek(0);
byte[] data = new byte[stream.Size];
await stream.AsStreamForRead().ReadAsync(data, 0, data.Length);
CvInvoke.Imdecode(data, ImreadModes.Color, result);
}
}
public static async Task<Mat> FromMediaCapture(MediaCapture _mediaCapture)
{
using (InMemoryRandomAccessStream stream = new InMemoryRandomAccessStream())
{
await _mediaCapture.CapturePhotoToStreamAsync(Windows.Media.MediaProperties.ImageEncodingProperties.CreateJpeg(), stream);
stream.Seek(0);
byte[] data = new byte[stream.Size];
await stream.AsStreamForRead().ReadAsync(data, 0, data.Length);
Mat result = new Mat();
CvInvoke.Imdecode(data, LoadImageType.Color, result);
return result;
}
}
private int PreparePacket()
{
Stream stream;
int offset = CEEnum.BMP == config.Encoder ? 54 : 0;
int size = (int)inMemStream.Size - offset;
stream = inMemStream.AsStreamForRead();
stream.Seek(offset, SeekOrigin.Begin);
int read_size = stream.Read(buffer, OVERHEAD_SIZE, size); //removing BMP header
if (size != read_size)
{
throw new Exception(string.Format("Reading error: read {0} on {1}.", read_size, size));
}
Array.Copy(BitConverter.GetBytes(photoIndex), 0, buffer, 4, 4);
Array.Copy(BitConverter.GetBytes(size), 0, buffer, 8, 4);
//Debug.Log(string.Format("\nSending {0} bytes, index {1}, STX {2}.\n", size, BitConverter.ToInt32(buffer, 4), BitConverter.ToInt32(buffer, 0)));
return(size);
}
/// <summary>
/// Converts this SoftwareBitmap instance to a Stream.
/// </summary>
/// <param name="softwareBitmap"></param>
/// <returns></returns>
public static async Task <Stream> AsStream(this SoftwareBitmap softwareBitmap)
{
var stream = new InMemoryRandomAccessStream();
BitmapEncoder encoder = await BitmapEncoder.CreateAsync(BitmapEncoder.PngEncoderId, stream);
encoder.SetSoftwareBitmap(softwareBitmap);
encoder.BitmapTransform.ScaledWidth = (uint)softwareBitmap.PixelWidth;
encoder.BitmapTransform.ScaledHeight = (uint)softwareBitmap.PixelHeight;
encoder.BitmapTransform.InterpolationMode = BitmapInterpolationMode.Fant;
await encoder.FlushAsync();
return(stream.AsStreamForRead());
}
private async Task ExecuteAddPersonCommand()
{
if (NewFaceName != string.Empty && Pictures.Count > 0 && SelectedPersonGroup != null)
{
IsLoading = true;
try
{
List <AddPersistedFaceResult> faces = new List <AddPersistedFaceResult>();
var result = await FaceService.CreatePersonAsync(SelectedPersonGroup.PersonGroupId, NewFaceName);
foreach (var picture in Pictures)
{
var currentPicture = picture.Bitmap;
IRandomAccessStream randomAccessStream = new InMemoryRandomAccessStream();
BitmapEncoder encoder = await BitmapEncoder.CreateAsync(BitmapEncoder.JpegEncoderId, randomAccessStream);
encoder.SetSoftwareBitmap(currentPicture);
await encoder.FlushAsync();
var stream = randomAccessStream.AsStreamForRead();
faces.Add(await FaceService.AddPersonFaceAsync(SelectedPersonGroup.PersonGroupId, result.PersonId, stream));
}
await new MessageDialog($"Successfully added {faces.Count} faces for person {NewFaceName} ({result.PersonId}).").ShowAsync();
//Reset the form
Pictures.Clear();
NewFaceName = "";
}
catch (FaceAPIException e)
{
await new MessageDialog(e.ErrorMessage).ShowAsync();
//await new MessageDialog(loader.GetString("AddFace_CompleteInformation")).ShowAsync();
}
finally
{
IsLoading = false;
}
}
else
{
await new MessageDialog(loader.GetString("AddFace_CompleteInformation")).ShowAsync();
}
}
/// <summary>
/// Uploads a photo as a WriteableBitmap. This methods converts the given bitmap to a PNG file before sending it to the server.
/// </summary>
/// <param name="uri"></param>
/// <param name="bmp"></param>
/// <returns></returns>
public static async Task UploadImage(string uri, WriteableBitmap bmp)
{
InMemoryRandomAccessStream memoryStream = new InMemoryRandomAccessStream();
BitmapEncoder encoder = await BitmapEncoder.CreateAsync(BitmapEncoder.PngEncoderId, memoryStream);
encoder.SetPixelData(BitmapPixelFormat.Bgra8, BitmapAlphaMode.Premultiplied, (uint)bmp.PixelWidth, (uint)bmp.PixelHeight, 96, 96, bmp.PixelBuffer.ToArray());
await encoder.FlushAsync();
Stream stream = memoryStream.AsStreamForRead();
byte[] pngBuffer = new byte[stream.Length];
stream.Read(pngBuffer, 0, pngBuffer.Length);
await UploadImage(uri, pngBuffer);
}