Update CameraControl.cs

Update the dpi parms to new WriteableBitMap

src/Camera.App/Core/CameraControl.cs

@@ -1162,10 +1162,10 @@ private void InitializeWritableBitmap(DecodedVideoFrameParameters parms)
  PixelFormat pixelFormat = PixelFormats.Pbgra32;
  transformParameters = new TransformParameters(new System.Drawing.Size(parms.Width, parms.Height), pixelFormat);
 
- // TODO ScreenInfo.DpiX, ScreenInfo.DpiY
+ Tuple<double, double> dpi = GetDpi();
  writeable = new WriteableBitmap
  (
- parms.Width, parms.Height, 96.0, 96.0, pixelFormat, null
+ parms.Width, parms.Height, dpi.Item1, dpi.Item2, pixelFormat, null
  );
 
  RenderOptions.SetBitmapScalingMode(writeable, BitmapScalingMode.NearestNeighbor);
@@ -1174,6 +1174,21 @@ private void InitializeWritableBitmap(DecodedVideoFrameParameters parms)
  ImageSource = writeable;
  }
 
+ /// <summary>
+ /// Gets the DPI.
+ /// </summary>
+ /// <returns>A Tuple. Item1 is X Dpi, Item2 is Y Dpi</returns>
+ private Tuple<double, double> GetDpi()
+ {
+ var source = PresentationSource.FromVisual(this);
+ if (source != null)
+ {
+ Matrix matrix = source.CompositionTarget.TransformToDevice;
+ return new Tuple<double, double>(matrix.M11 * 96.0, matrix.M22 * 96.0);
+ }
+ return new Tuple<double, double>(96.0, 96.0);
+ }
+
  private void RunMotionCommand(object parm)
  {
  if (parm is CameraMotion motion)