国产一级a片免费看高清,亚洲熟女中文字幕在线视频,黄三级高清在线播放,免费黄色视频在线看

       private async void GetContent()

       {

           uintstartX = 100;

           uintstartY = 100;

           uintheight = 300;

           uint width= 300;

          StorageFile image1 = awaitStorageFile.GetFileFromApplicationUriAsync(newUri("ms-appx:///image/test1.jpg"));

           using(IRandomAccessStream stream1 = awaitimage1.OpenAsync(FileAccessMode.Read))

           {

              BitmapDecoder decoder = awaitBitmapDecoder.CreateAsync(stream1);

              byte[] pixels = awaitGetPixelData(decoder, startX, startY, width, height,decoder.PixelWidth, decoder.PixelHeight);

              WriteableBitmapwriteableBitmap = new WriteableBitmap((int)width,(int)height);

              Stream pixStream =writeableBitmap.PixelBuffer.AsStream();

              pixStream.Write(pixels, 0,(int)(width * height * 4));

              this.msiImage.Source =writeableBitmap;

           }

       }

       private async Task GetPixelData(BitmapDecoderdecoder, uint startPointX, uint startPointY, uint width, uintheight, uint scaledWidth, uint scaledHeight)

       {

          BitmapBounds bounds = new BitmapBounds();

           bounds.X =startPointX;

           bounds.Y =startPointY;

          bounds.Height = height;

          bounds.Width = width;

          BitmapTransform transform = new BitmapTransform();

          transform.Bounds = bounds;

          transform.ScaledWidth = scaledWidth;

          transform.ScaledHeight = scaledHeight;

           // Get thecropped pixels within the bounds of transform.

          PixelDataProvider pix = awaitdecoder.GetPixelDataAsync(BitmapPixelFormat.Bgra8,BitmapAlphaMode.Straight,

              transform,

             ExifOrientationMode.IgnoreExifOrientation,ColorManagementMode.ColorManageToSRgb);

           byte[]pixels = pix.DetachPixelData();

           returnpixels;

       }