private async void ButtonFilePick_Click(object sender, RoutedEventArgs e)
{
var picker = new FileOpenPicker();
picker.ViewMode = PickerViewMode.Thumbnail;
picker.SuggestedStartLocation = PickerLocationId.PicturesLibrary;
picker.FileTypeFilter.Add(".jpg");
picker.FileTypeFilter.Add(".jpeg");
picker.FileTypeFilter.Add(".png");
StorageFile file = await picker.PickSingleFileAsync();
if (file != null)
{
ImageProperties imgProp = await file.Properties.GetImagePropertiesAsync();
var savedPictureStream = await file.OpenAsync(FileAccessMode.Read);
//set image properties and show the taken photo
bitmap = new WriteableBitmap((int)imgProp.Width, (int)imgProp.Height);
await bitmap.SetSourceAsync(savedPictureStream);
BBQImage.Source = bitmap;
BBQImage.Visibility = Visibility.Visible;
(this.DataContext as BBQRecipeViewModel).imageSource = file.Path;
}
}
private async void Page_Loaded(object sender, RoutedEventArgs e)
{
await InitializeQrCode();
var imgProp = new ImageEncodingProperties { Subtype = "BMP", Width = 600, Height = 800 };
var bcReader = new BarcodeReader();
while (true)
{
var stream = new InMemoryRandomAccessStream();
await _mediaCapture.CapturePhotoToStreamAsync(imgProp, stream);
stream.Seek(0);
var wbm = new WriteableBitmap(600, 800);
await wbm.SetSourceAsync(stream);
var result = bcReader.Decode(wbm);
if (result != null)
{
var msgbox = new MessageDialog(result.Text);
await msgbox.ShowAsync();
}
}
}
async Task<string> OCRAsync(byte[] buffer, uint width, uint height)
{
var bitmap = new WriteableBitmap((int)width, (int)height);
var memoryStream = new MemoryStream(buffer);
await bitmap.SetSourceAsync(memoryStream.AsRandomAccessStream());
if (bitmap.PixelHeight < 40 ||
bitmap.PixelHeight > 2600 ||
bitmap.PixelWidth < 40 ||
bitmap.PixelWidth > 2600)
bitmap = await ResizeImage(bitmap, (uint)(bitmap.PixelWidth * .7), (uint)(bitmap.PixelHeight * .7));
var ocrResult = await ocrEngine.RecognizeAsync((uint)bitmap.PixelHeight, (uint)bitmap.PixelWidth, bitmap.PixelBuffer.ToArray());
if (ocrResult.Lines != null)
{
var extractedText = new StringBuilder();
foreach (var line in ocrResult.Lines)
{
foreach (var word in line.Words)
extractedText.Append(word.Text + " ");
extractedText.Append(Environment.NewLine);
}
return extractedText.ToString();
}
return null;
}
public async Task ScanBarcodeAsync(Windows.Storage.StorageFile file)
{
WriteableBitmap bitmap;
BitmapDecoder decoder;
using (IRandomAccessStream str = await file.OpenReadAsync())
{
decoder = await BitmapDecoder.CreateAsync(str);
bitmap = new WriteableBitmap(Convert.ToInt32(decoder.PixelWidth), Convert.ToInt32(decoder.PixelHeight));
await bitmap.SetSourceAsync(str);
}
lock (locker)
{
ZXing.BarcodeReader reader = new ZXing.BarcodeReader();
reader.Options.PossibleFormats = new ZXing.BarcodeFormat[] { ZXing.BarcodeFormat.CODE_128, ZXing.BarcodeFormat.QR_CODE, ZXing.BarcodeFormat.CODE_39 };
reader.Options.TryHarder = true;
reader.AutoRotate = true;
var results = reader.Decode(bitmap);
if (results == null)
{
this.OnBarcodeScannCompleted(new BarcodeScanCompletedEventArgs(false, string.Empty));
}
else
{
this.OnBarcodeScannCompleted(new BarcodeScanCompletedEventArgs(true, results.Text));
}
}
}
async Task<WriteableBitmap> SelectImageFromPicker()
{
var picker = new FileOpenPicker();
picker.ViewMode = PickerViewMode.Thumbnail;
picker.SuggestedStartLocation = PickerLocationId.PicturesLibrary;
picker.FileTypeFilter.Add(".jpg");
picker.FileTypeFilter.Add(".jpeg");
picker.FileTypeFilter.Add(".png");
StorageFile file = await picker.PickSingleFileAsync();
if (file != null)
{
ImageProperties imgProp = await file.Properties.GetImagePropertiesAsync();
var savedPictureStream = await file.OpenAsync(FileAccessMode.Read);
//set image properties and show the taken photo
bitmap = new WriteableBitmap((int)imgProp.Width, (int)imgProp.Height);
await bitmap.SetSourceAsync(savedPictureStream);
bitmap.Invalidate();
SaveImageAsync(file);
return bitmap;
}
else return null;
}
private async Task<BandIcon> LoadIcon(string uri)
{
StorageFile imageFile = await StorageFile.GetFileFromApplicationUriAsync(new Uri(uri));
using (IRandomAccessStream fileStream = await imageFile.OpenAsync(FileAccessMode.Read))
{
WriteableBitmap bitmap = new WriteableBitmap(1, 1);
await bitmap.SetSourceAsync(fileStream);
return bitmap.ToBandIcon();
}
}
private static async Task<WriteableBitmap> GetWriteableBitmap(Uri uri)
{
var imageFile = await StorageFile.GetFileFromApplicationUriAsync(uri);
using (var fileStream = await imageFile.OpenAsync(FileAccessMode.Read))
{
var writeableBitmap = new WriteableBitmap(1, 1);
await writeableBitmap.SetSourceAsync(fileStream);
return writeableBitmap;
}
}
public static async Task<WriteableBitmap> GetPictureAsync(StorageFile ImageFile)
{
using (IRandomAccessStream stream = await ImageFile.OpenAsync(FileAccessMode.Read))
{
BitmapDecoder decoder = await BitmapDecoder.CreateAsync(stream);
WriteableBitmap bmp = new WriteableBitmap((int)decoder.PixelWidth, (int)decoder.PixelHeight);
await bmp.SetSourceAsync(stream);
return bmp;
}
}
private async void GetThumbnail()
{
DeviceThumbnail thumb = await _information.GetGlyphThumbnailAsync();
Stream s = thumb.AsStreamForRead();
MemoryStream ms = new MemoryStream();
await s.CopyToAsync(ms);
ms.Seek(0, SeekOrigin.Begin);
WriteableBitmap wb = new WriteableBitmap(1, 1);
await wb.SetSourceAsync(ms.AsRandomAccessStream());
_thumbnail = wb;
OnPropertyChanged("Thumbnail");
}
public async void Quadraliteral(StorageFile file, IList<WF.Point> points)
{
var data = await FileIO.ReadBufferAsync(file);
OpencvImageProcess opencv = new OpencvImageProcess();
// create a stream from the file
var ms = new InMemoryRandomAccessStream();
var dw = new DataWriter(ms);
dw.WriteBuffer(data);
await dw.StoreAsync();
ms.Seek(0);
// find out how big the image is, don't need this if you already know
var bm = new BitmapImage();
await bm.SetSourceAsync(ms);
// create a writable bitmap of the right size
var wb = new WriteableBitmap(bm.PixelWidth, bm.PixelHeight);
ms.Seek(0);
// load the writable bitpamp from the stream
await wb.SetSourceAsync(ms);
Bitmap bmp = (Bitmap)wb;
var wb1 = opencv.GetImageCorners(wb);
wb1.Invalidate();
//wb.Invalidate();
// define quadrilateral's corners
//List<IntPoint> corners = new List<IntPoint>();
//foreach (var point in points)
//{
// corners.Add(new IntPoint((int)point.X, (int)point.Y));
//}
//// create filter
//var filter =
// new SimpleQuadrilateralTransformation(corners);
//// apply the filter
//Bitmap newImage = filter.Apply(bmp);
//wb = (WriteableBitmap)newImage;
var f = await this.WriteableBitmapToStorageFile(wb1, FileFormat.Jpeg);
}
public ReportPhoto(StorageFile file)
{
FilePath = file.Path;
StorageItemThumbnail thumbnail = file.GetThumbnailAsync(ThumbnailMode.ListView).AsTask().Result;
BitmapImage thumbnailImage = new BitmapImage();
var ignore = thumbnailImage.SetSourceAsync(thumbnail);
ThumbnailSource = thumbnailImage;
StorageItemThumbnail imageAsThumbnail = file.GetScaledImageAsThumbnailAsync(ThumbnailMode.SingleItem).AsTask().Result;
WriteableBitmap bitmap = new WriteableBitmap((int)imageAsThumbnail.OriginalWidth, (int)imageAsThumbnail.OriginalHeight);
ignore = bitmap.SetSourceAsync(imageAsThumbnail);
Bitmap = bitmap;
}
private async Task<StorageFile> TakePhoto()
{
StorageFile filestr = await USBCam.TakePhotoAsync("picture.jpg");
Debug.WriteLine(string.Format("File name: {0}", filestr.Name));
using (IRandomAccessStream myfileStream = await filestr.OpenAsync(FileAccessMode.Read))
{
WriteableBitmap bitmap = new WriteableBitmap(1, 1);
await bitmap.SetSourceAsync(myfileStream);
FacePhoto.Source = bitmap;
}
return filestr;
}
public static async Task<ImageSource> FromBase64(string base64)
{
// read stream
var bytes = Convert.FromBase64String(base64);
var image = bytes.AsBuffer().AsStream().AsRandomAccessStream();
// decode image
var decoder = await BitmapDecoder.CreateAsync(image);
image.Seek(0);
// create bitmap
var output = new WriteableBitmap((int) decoder.PixelHeight, (int) decoder.PixelWidth);
await output.SetSourceAsync(image);
return output;
}
public async Task<object> ConvertFromEncodedStream(Stream encodedStream, int width, int height)
{
if (encodedStream == null)
return null;
var image = new WriteableBitmap(width, height);
encodedStream.Seek(0, SeekOrigin.Begin);
await image.SetSourceAsync(encodedStream.AsRandomAccessStream());
return image;
//var writeableImage = new WriteableBitmap(image.PixelWidth, image.PixelHeight);
//image.SetSource(encodedStream.AsRandomAccessStream());
//return writeableImage;
}
public async Task LoadImageAsync()
{
using (var stream = await file.OpenReadAsync())
{
WriteableBitmap bitmap = new WriteableBitmap(width, height);
await bitmap.SetSourceAsync(stream);
using (var buffer = bitmap.PixelBuffer.AsStream())
{
pixels = new Byte[4 * width * height];
buffer.Read(pixels, 0, pixels.Length);
}
this.bitmap = bitmap;
}
}
private async void ViewFinder_OnTapped()
{
ImageEncodingProperties imageProperties = ImageEncodingProperties.CreateJpeg();
var stream = new InMemoryRandomAccessStream();
await captureManager.CapturePhotoToStreamAsync(imageProperties, stream);
_bitmap = new WriteableBitmap(300, 300);
stream.Seek(0);
await _bitmap.SetSourceAsync(stream);
stream.Seek(0);
var buffer = new global::Windows.Storage.Streams.Buffer((uint)stream.Size);
stream.ReadAsync(buffer, (uint)stream.Size, InputStreamOptions.None);
await captureManager.StopPreviewAsync();
}
public async static Task<WriteableBitmap> ToBitmapImageAsync(this Stream imageStream, Tuple<int, int> downscale, bool downscaleDipUnits, InterpolationMode mode, ImageInformation imageInformation = null)
{
if (imageStream == null)
return null;
using (IRandomAccessStream image = imageStream.AsRandomAccessStream())
{
if (downscale != null && (downscale.Item1 > 0 || downscale.Item2 > 0))
{
using (var downscaledImage = await image.ResizeImage(downscale.Item1, downscale.Item2, mode, downscaleDipUnits, imageInformation).ConfigureAwait(false))
{
BitmapDecoder decoder = await BitmapDecoder.CreateAsync(downscaledImage);
downscaledImage.Seek(0);
WriteableBitmap resizedBitmap = null;
await MainThreadDispatcher.Instance.PostAsync(async () =>
{
resizedBitmap = new WriteableBitmap((int)decoder.PixelWidth, (int)decoder.PixelHeight);
await resizedBitmap.SetSourceAsync(downscaledImage);
});
return resizedBitmap;
}
}
else
{
BitmapDecoder decoder = await BitmapDecoder.CreateAsync(image);
image.Seek(0);
WriteableBitmap bitmap = null;
if (imageInformation != null)
{
imageInformation.SetCurrentSize((int)decoder.PixelWidth, (int)decoder.PixelHeight);
imageInformation.SetOriginalSize((int)decoder.PixelWidth, (int)decoder.PixelHeight);
}
await MainThreadDispatcher.Instance.PostAsync(async () =>
{
bitmap = new WriteableBitmap((int)decoder.PixelWidth, (int)decoder.PixelHeight);
await bitmap.SetSourceAsync(image);
});
return bitmap;
}
}
}
public static async Task<WriteableBitmap> ToWriteableBitmapAsync(this Stream stream)
{
var randomAccessStream = stream.AsRandomAccessStream();
var decoder = await BitmapDecoder.CreateAsync(randomAccessStream);
// Get the first frame from the decoder
var frame = await decoder.GetFrameAsync(0);
var wid = (int) frame.PixelWidth;
var hgt = (int) frame.PixelHeight;
var target = new WriteableBitmap(wid, hgt);
randomAccessStream.Seek(0);
await target.SetSourceAsync(randomAccessStream);
return target;
}
private async Task OnHearbeat(CameraHeartBeat heartbeat)
{
await _dispatcher.RunAsync(CoreDispatcherPriority.Normal, async () =>
{
var cameras = (IEnumerable<RemoteCameraModel>) Cameras.Source;
var camera = cameras.FirstOrDefault(x => x.IPAddress.ToString() == heartbeat.CameraId);
if (camera != null)
{
var decoder = await BitmapDecoder.CreateAsync(heartbeat.ViewBuffer.AsStream().AsRandomAccessStream());
var f = await decoder.GetFrameAsync(0);
var bmp = new WriteableBitmap((int) f.PixelWidth, (int) f.PixelHeight);
await bmp.SetSourceAsync(heartbeat.ViewBuffer.AsStream().AsRandomAccessStream());
camera.View.Value = bmp;
}
});
}
public async Task<WriteableBitmap> CaptureJpegImageAsync()
{
var bitmap = new WriteableBitmap(400,300);
using (var memoryStream = new InMemoryRandomAccessStream())
{
var file = await Windows.Storage.KnownFolders.PicturesLibrary.CreateFileAsync(IMAGECAPTURE_FILENAME, Windows.Storage.CreationCollisionOption.ReplaceExisting);
await _exceptionHandler.Run(async () =>
{
await _mediaCapture.CapturePhotoToStorageFileAsync(_imageEncodingProperties, file);
var photoStream = await file.OpenAsync(Windows.Storage.FileAccessMode.Read);
await bitmap.SetSourceAsync(photoStream);
});
}
return bitmap;
}
/// <summary>
/// Scales the image in the given memory stream.
/// </summary>
/// <param name="originalStream">The original image stream to scale.</param>
/// <param name="originalResolutionWidth">The original width.</param>
/// <param name="originalResolutionHeight">The original height.</param>
/// <param name="scaledStream">Stream where the scaled image is stored.</param>
/// <param name="scaleWidth">The target width.</param>
/// <param name="scaleHeight">The target height.</param>
/// <returns></returns>
public static async Task ScaleImageStreamAsync(MemoryStream originalStream,
int originalResolutionWidth,
int originalResolutionHeight,
MemoryStream scaledStream,
int scaleWidth,
int scaleHeight)
{
System.Diagnostics.Debug.WriteLine(DebugTag + "ScaleImageStreamAsync() ->");
// Create a bitmap containing the full resolution image
var bitmap = new WriteableBitmap(originalResolutionWidth, originalResolutionHeight);
originalStream.Seek(0, SeekOrigin.Begin);
await bitmap.SetSourceAsync(originalStream.AsRandomAccessStream());
/* Construct a JPEG encoder with the newly created
* InMemoryRandomAccessStream as target
*/
IRandomAccessStream previewResolutionStream = new InMemoryRandomAccessStream();
previewResolutionStream.Size = 0;
BitmapEncoder encoder = await BitmapEncoder.CreateAsync(
BitmapEncoder.JpegEncoderId, previewResolutionStream);
// Copy the full resolution image data into a byte array
Stream pixelStream = bitmap.PixelBuffer.AsStream();
var pixelArray = new byte[pixelStream.Length];
await pixelStream.ReadAsync(pixelArray, 0, pixelArray.Length);
// Set the scaling properties
encoder.BitmapTransform.ScaledWidth = (uint)scaleWidth;
encoder.BitmapTransform.ScaledHeight = (uint)scaleHeight;
encoder.BitmapTransform.InterpolationMode = BitmapInterpolationMode.Fant;
encoder.IsThumbnailGenerated = true;
// Set the image data and the image format setttings to the encoder
encoder.SetPixelData(BitmapPixelFormat.Bgra8, BitmapAlphaMode.Ignore,
(uint)originalResolutionWidth, (uint)originalResolutionHeight,
96.0, 96.0, pixelArray);
await encoder.FlushAsync();
previewResolutionStream.Seek(0);
await previewResolutionStream.AsStream().CopyToAsync(scaledStream);
System.Diagnostics.Debug.WriteLine(DebugTag + "<- ScaleImageStreamAsync()");
}
public async static Task<WriteableBitmap> ToBitmapImageAsync(this byte[] imageBytes, Tuple<int, int> downscale, bool downscaleDipUnits, InterpolationMode mode)
{
if (imageBytes == null)
return null;
using (var imageStream = imageBytes.AsBuffer().AsStream())
using (IRandomAccessStream image = imageStream.AsRandomAccessStream())
{
if (downscale != null && (downscale.Item1 > 0 || downscale.Item2 > 0))
{
using (var downscaledImage = await image.ResizeImage(downscale.Item1, downscale.Item2, mode, downscaleDipUnits).ConfigureAwait(false))
{
BitmapDecoder decoder = await BitmapDecoder.CreateAsync(downscaledImage);
downscaledImage.Seek(0);
WriteableBitmap resizedBitmap = null;
await CoreApplication.MainView.CoreWindow.Dispatcher.RunAsync(Windows.UI.Core.CoreDispatcherPriority.Low, async () =>
{
resizedBitmap = new WriteableBitmap((int)decoder.PixelWidth, (int)decoder.PixelHeight);
await resizedBitmap.SetSourceAsync(downscaledImage);
});
return resizedBitmap;
}
}
else
{
BitmapDecoder decoder = await BitmapDecoder.CreateAsync(image);
image.Seek(0);
WriteableBitmap bitmap = null;
await CoreApplication.MainView.CoreWindow.Dispatcher.RunAsync(Windows.UI.Core.CoreDispatcherPriority.Low, async () =>
{
bitmap = new WriteableBitmap((int)decoder.PixelWidth, (int)decoder.PixelHeight);
await bitmap.SetSourceAsync(image);
});
return bitmap;
}
}
}
protected async Task<WriteableBitmap> GetImage(string url)
{
try
{
IBuffer buffer = await BaseService.SendGetRequestAsBytes(url);
if (buffer != null)
{
BitmapImage bi = new BitmapImage();
WriteableBitmap wb = null; Stream stream2Write;
using (InMemoryRandomAccessStream stream = new InMemoryRandomAccessStream())
{
stream2Write = stream.AsStreamForWrite();
await stream2Write.WriteAsync(buffer.ToArray(), 0, (int)buffer.Length);
await stream2Write.FlushAsync();
stream.Seek(0);
await bi.SetSourceAsync(stream);
wb = new WriteableBitmap(bi.PixelWidth, bi.PixelHeight);
stream.Seek(0);
await wb.SetSourceAsync(stream);
return wb;
}
}
else
{
return null;
}
}
catch
{
return null;
}
}
private async Task<Stream> CreateThumb(Stream orgStm, int width, int height, string filePath) {
var ras = orgStm.AsRandomAccessStream();
var wb = new WriteableBitmap(width, height);
ras.Seek(0);
await wb.SetSourceAsync(ras);
var stm = wb.PixelBuffer.AsStream();
var bytes = await stm.GetBytes();
using (var fs = await FileManager.Instance.Value.OpenFile(filePath)) {
//BitmapEncoder 无法写入 MemoryStream
BitmapEncoder encoder = await BitmapEncoder.CreateAsync(
BitmapEncoder.JpegEncoderId,
fs);
encoder.BitmapTransform.ScaledWidth = (uint)width;
encoder.BitmapTransform.ScaledHeight = (uint)height;
//encoder.BitmapTransform.Rotation = BitmapRotation.Clockwise90Degrees;
encoder.SetPixelData(
BitmapPixelFormat.Bgra8,
BitmapAlphaMode.Straight,
(uint)wb.PixelWidth,
(uint)wb.PixelHeight,
96.0,
96.0,
bytes);
await encoder.FlushAsync();
return fs.CloneStream().AsStream();
}
}
private async void AppBarButton_Click(object sender, RoutedEventArgs e)
{
(sender as AppBarButton).Icon.Foreground = new SolidColorBrush(Color.FromArgb(255, 255, 169, 3));
(sender as AppBarButton).Foreground = new SolidColorBrush(Color.FromArgb(255, 255, 169, 3));
AppBarButton bar = sender as AppBarButton;
foreach (var item in barList)
{
if (item.Equals(bar))
{
item.Icon.Foreground = new SolidColorBrush(Color.FromArgb(255, 255, 169, 3));
item.Foreground = new SolidColorBrush(Color.FromArgb(255, 255, 169, 3));
}
else
{
item.Icon.Foreground = new SolidColorBrush(Color.FromArgb(255, 255, 255, 255));
item.Foreground = new SolidColorBrush(Color.FromArgb(255, 255, 255, 255));
}
}
if (WB_CapturedImage == null)
{
StorageFile file = await StorageFile.GetFileFromPathAsync(filePath);
BitmapImage image1 = new BitmapImage();
using (IRandomAccessStream fileStream = await file.OpenAsync(Windows.Storage.FileAccessMode.Read))
{
image1.SetSource(fileStream);
WB_CapturedImage = new WriteableBitmap((int)image1.PixelWidth, (int)image1.PixelHeight);
}
using (IRandomAccessStream fileStream = await file.OpenAsync(Windows.Storage.FileAccessMode.Read))
{
await WB_CapturedImage.SetSourceAsync(fileStream);
m_displayHeightNonScaled = WB_CapturedImage.PixelHeight;
m_displayWidthNonScaled = WB_CapturedImage.PixelWidth;
}
}
if (clippingGrid.Visibility == Visibility.Collapsed)
{
ResetClippingGrid();
}
}
private async void SaveTextPicture()
{
try
{
StorageFolder savedPics = KnownFolders.PicturesLibrary;
IReadOnlyList<StorageFolder> folders = await savedPics.GetFoldersAsync();
foreach (var item in folders)
{
if (item.Name.Equals("Camera Roll"))
{
savedPics = item;
break;
}
}
string fileName = DateTime.Now.ToString("yyyyMMddHHmmss") + ".png";
// 1、在位图中呈现UI元素
RenderTargetBitmap rtb = new RenderTargetBitmap();
await rtb.RenderAsync(this.textCanvas);
// 提取像素数据
IBuffer buffer = await rtb.GetPixelsAsync();
// 创建新文件
StorageFile newFile = await savedPics.CreateFileAsync(fileName, CreationCollisionOption.ReplaceExisting);
using (IRandomAccessStream streamOut = await newFile.OpenAsync(FileAccessMode.ReadWrite))
{
// 实例化编码器
BitmapEncoder pngEncoder = await BitmapEncoder.CreateAsync(BitmapEncoder.PngEncoderId, streamOut);
// 写入像素数据
byte[] data = buffer.ToArray();
pngEncoder.SetPixelData(BitmapPixelFormat.Bgra8,
BitmapAlphaMode.Straight,
(uint)rtb.PixelWidth,
(uint)rtb.PixelHeight,
96d, 96d, data);
await pngEncoder.FlushAsync();
streamOut.Dispose();
}
//StorageFile file = await StorageFile.GetFileFromPathAsync(newFile.Path);
//StorageFile newFile1 = await savedPics.CreateFileAsync(fileName, CreationCollisionOption.OpenIfExists);
using (IRandomAccessStream streamOut = await newFile.OpenAsync(FileAccessMode.Read))
{
BitmapImage image1 = new BitmapImage();
image1.SetSource(streamOut);
image.Source = image1;
WB_CapturedImage = new WriteableBitmap((int)image1.PixelWidth, (int)image1.PixelHeight);
streamOut.Dispose();
}
//WB_CapturedImage.SetSource(streamOut);
using (IRandomAccessStream streamOut = await newFile.OpenAsync(FileAccessMode.Read))
{
await WB_CapturedImage.SetSourceAsync(streamOut);
m_displayHeightNonScaled = WB_CapturedImage.PixelHeight;
m_displayWidthNonScaled = WB_CapturedImage.PixelWidth;
//image.Source = WB_CapturedImage;
streamOut.Dispose();
}
//textCanvas.ClearValue(BackgroundProperty);
textCanvas.Width = image.ActualWidth;
textCanvas.Height = image.ActualHeight;
}
catch (Exception e)
{
textCanvas.ClearValue(BackgroundProperty);
#if DEBUG
System.Diagnostics.Debug.WriteLine(e.Message);
#endif
}
}
private async void SaveInkPicture()
{
if (ink.Width == 0)
{
return;
}
//ink.Width = WB_CapturedImage.PixelWidth;
//ink.Height = WB_CapturedImage.PixelHeight;
((App)App.Current).SyncStrokeEx(strokeMapping, ink.InkPresenter.StrokeContainer, ink.Width, true);
CanvasDevice device = CanvasDevice.GetSharedDevice();
//CanvasRenderTarget renderTarget = new CanvasRenderTarget(device, WB_CapturedImage.PixelWidth, WB_CapturedImage.PixelHeight, 96);
CanvasRenderTarget renderTarget = new CanvasRenderTarget(device, (float)ink.Width, (float)ink.Height, 96);
using (var ds = renderTarget.CreateDrawingSession())
{
ds.Clear(Color.FromArgb(0, 255, 255, 255));
ds.DrawInk(ink.InkPresenter.StrokeContainer.GetStrokes());
}
StorageFolder savedPics = KnownFolders.PicturesLibrary;
string fileName = DateTime.Now.ToString("yyyyMMddHHmmss") + ".png";
StorageFile file = await savedPics.CreateFileAsync(fileName, CreationCollisionOption.ReplaceExisting);
using (var fileStream = await file.OpenAsync(FileAccessMode.ReadWrite))
{
await renderTarget.SaveAsync(fileStream, CanvasBitmapFileFormat.Png, 1f);
}
using (IRandomAccessStream fileStream = await file.OpenAsync(Windows.Storage.FileAccessMode.ReadWrite))
{
//image.SetSource(fileStream);
WriteableBitmap InkImage = new WriteableBitmap(WB_CapturedImage.PixelWidth, WB_CapturedImage.PixelHeight);
await InkImage.SetSourceAsync(fileStream);
imageInk.Source = InkImage;
imageInk.Visibility = Visibility.Visible;
ink.InkPresenter.StrokeContainer.Clear();
ink.Visibility = Visibility.Collapsed;
}
RenderTargetBitmap rtb = new RenderTargetBitmap();
await rtb.RenderAsync(this.imagePanel);
// 提取像素数据
IBuffer buffer = await rtb.GetPixelsAsync();
// 获取文件流
IRandomAccessStream streamOut = await file.OpenAsync(FileAccessMode.ReadWrite);
// 实例化编码器
BitmapEncoder pngEncoder = await BitmapEncoder.CreateAsync(BitmapEncoder.PngEncoderId, streamOut);
//重写writeablebitmap
WB_CapturedImage = new WriteableBitmap((int)rtb.PixelWidth, (int)rtb.PixelHeight);
// 写入像素数据
byte[] data = buffer.ToArray();
pngEncoder.SetPixelData(BitmapPixelFormat.Bgra8,
BitmapAlphaMode.Straight,
(uint)rtb.PixelWidth,
(uint)rtb.PixelHeight,
96d, 96d, data);
await pngEncoder.FlushAsync();
streamOut.Dispose();
ink.Visibility = Visibility.Visible;
imageInk.Visibility = Visibility.Collapsed;
using (IRandomAccessStream fileStream = await file.OpenAsync(Windows.Storage.FileAccessMode.ReadWrite))
{
await WB_CapturedImage.SetSourceAsync(fileStream);
image.Source = WB_CapturedImage;
}
//var bmp = new RenderTargetBitmap();
//await bmp.RenderAsync(ink);
//StorageFolder savedPics = KnownFolders.PicturesLibrary;
//string fileName = DateTime.Now.ToString("yyyyMMddHHmmss") + ".png";
//StorageFile file = await savedPics.CreateFileAsync(fileName, CreationCollisionOption.ReplaceExisting);
//// Saving to file.
//using (var stream = await file.OpenStreamForWriteAsync())
//{
// // Initialization.
// var pixelBuffer = await bmp.GetPixelsAsync();
// var logicalDpi = DisplayInformation.GetForCurrentView().LogicalDpi;
// // convert stream to IRandomAccessStream
// var randomAccessStream = stream.AsRandomAccessStream();
// // encoding to PNG
// var encoder = await BitmapEncoder.CreateAsync(BitmapEncoder.PngEncoderId, randomAccessStream);
// // Finish saving
// encoder.SetPixelData(BitmapPixelFormat.Bgra8, BitmapAlphaMode.Ignore, (uint)bmp.PixelWidth,
// (uint)bmp.PixelHeight, logicalDpi, logicalDpi, pixelBuffer.ToArray());
// // Flush encoder.
// await encoder.FlushAsync();
// filePath = file.Path;
//}
}
private async void Page_Loaded(object sender, RoutedEventArgs e)
{
try
{
StorageFile file = await StorageFile.GetFileFromPathAsync(filePath);
BitmapImage image1 = new BitmapImage();
using (IRandomAccessStream fileStream = await file.OpenAsync(Windows.Storage.FileAccessMode.Read))
{
image1.SetSource(fileStream);
WB_CapturedImage = new WriteableBitmap((int)image1.PixelWidth, (int)image1.PixelHeight);
}
using (IRandomAccessStream fileStream = await file.OpenAsync(Windows.Storage.FileAccessMode.Read))
{
await WB_CapturedImage.SetSourceAsync(fileStream);
m_displayHeightNonScaled = WB_CapturedImage.PixelHeight;
m_displayWidthNonScaled = WB_CapturedImage.PixelWidth;
}
}
catch (Exception ex)
{
#if DEBUG
System.Diagnostics.Debug.WriteLine(ex.Message);
#endif
}
}
private static async Task<WriteableBitmap> LoadImage(string filePath)
{
WriteableBitmap writeableBitmap=null;
StorageFile storageFile =
await StorageFile.GetFileFromApplicationUriAsync(new Uri(filePath));
using (IRandomAccessStream fileStream = await storageFile.OpenAsync(FileAccessMode.Read))
{
BitmapImage bitmapImage = new BitmapImage();
await bitmapImage.SetSourceAsync(fileStream);
writeableBitmap =
new WriteableBitmap(bitmapImage.PixelWidth, bitmapImage.PixelHeight);
fileStream.Seek(0);
await writeableBitmap.SetSourceAsync(fileStream);
}
return writeableBitmap;
}
async Task<WriteableBitmap> ResizeImage(WriteableBitmap baseWriteBitmap, uint width, uint height)
{
Stream stream = baseWriteBitmap.PixelBuffer.AsStream();
byte[] pixels = new byte[(uint)stream.Length];
await stream.ReadAsync(pixels, 0, pixels.Length);
var inMemoryRandomStream = new InMemoryRandomAccessStream();
var encoder = await BitmapEncoder.CreateAsync(BitmapEncoder.JpegEncoderId, inMemoryRandomStream);
encoder.SetPixelData(BitmapPixelFormat.Bgra8, BitmapAlphaMode.Ignore, (uint)baseWriteBitmap.PixelWidth, (uint)baseWriteBitmap.PixelHeight, 96, 96, pixels);
await encoder.FlushAsync();
var transform = new BitmapTransform
{
ScaledWidth = width,
ScaledHeight = height
};
inMemoryRandomStream.Seek(0);
var decoder = await BitmapDecoder.CreateAsync(inMemoryRandomStream);
var pixelData = await decoder.GetPixelDataAsync(
BitmapPixelFormat.Bgra8,
BitmapAlphaMode.Straight,
transform,
ExifOrientationMode.IgnoreExifOrientation,
ColorManagementMode.DoNotColorManage);
var sourceDecodedPixels = pixelData.DetachPixelData();
var inMemoryRandomStream2 = new InMemoryRandomAccessStream();
var encoder2 = await BitmapEncoder.CreateAsync(BitmapEncoder.JpegEncoderId, inMemoryRandomStream2);
encoder2.SetPixelData(BitmapPixelFormat.Bgra8, BitmapAlphaMode.Ignore, width, height, 96, 96, sourceDecodedPixels);
await encoder2.FlushAsync();
inMemoryRandomStream2.Seek(0);
var bitmap = new WriteableBitmap((int)width, (int)height);
await bitmap.SetSourceAsync(inMemoryRandomStream2);
return bitmap;
}
