protected override void OnElementChanged(ElementChangedEventArgs <AR_Sudoku_Solver.CameraPreview> e)
{
base.OnElementChanged(e);
if (Control == null)
{
cameraPreview = new CameraPreview(Context);
SetNativeControl(cameraPreview);
}
if (e.OldElement != null)
{
// Unsubscribe
cameraPreview.Click -= OnCameraPreviewClicked;
}
if (e.NewElement != null)
{
Control.Preview = Camera.Open((int)e.NewElement.Camera);
var parameters = Control.Preview.GetParameters();
parameters.FocusMode = Camera.Parameters.FocusModeContinuousPicture;
Control.Preview.SetParameters(parameters);
int numBytes = (parameters.PreviewSize.Width * parameters.PreviewSize.Height * Android.Graphics.ImageFormat.GetBitsPerPixel(parameters.PreviewFormat)) / 8;
using (FastJavaByteArray buffer = new FastJavaByteArray(numBytes))
{
// allocate new Java byte arrays for Android to use for preview frames
Control.Preview.AddCallbackBuffer(new FastJavaByteArray(numBytes));
}
Control.Preview.SetNonMarshalingPreviewCallback(new AndroidImagePreviewCallbackHandler(e.NewElement.ImageHandlerCallback, cameraPreview));
// Subscribe
cameraPreview.Click += OnCameraPreviewClicked;
}
}
public AndroidImagePreviewCallbackHandler(iImagePreviewHandler previewHandler, CameraPreview camerapreview)
{
this.previewHandler = previewHandler;
this.camerapreview = camerapreview;
var assembly = typeof(CameraPreviewRenderer).Assembly;
var stream = assembly.GetManifestResourceStream("AR_Sudoku_Solver.Droid.trainedKSVM.bin");
byte[] trainedKSVM = new byte[stream.Length];
for (int i = 0; i < stream.Length; i++)
{
trainedKSVM[i] = (byte)stream.ReadByte();
}
sf = new SudokuFinder(trainedKSVM);
}