public void SetupOrientationAndTransform()
{
var roi = RegionOfInterest;
ROIToGlobalTransform = CGAffineTransform.MakeTranslation(roi.X, roi.Y);
ROIToGlobalTransform = CGAffineTransform.Scale(ROIToGlobalTransform, roi.Width, roi.Height);
switch (CurrentOrientation)
{
case UIDeviceOrientation.LandscapeLeft:
TextOrientation = ImageIO.CGImagePropertyOrientation.Up;
UIRotationTransform = CGAffineTransform.MakeIdentity();
break;
case UIDeviceOrientation.LandscapeRight:
TextOrientation = ImageIO.CGImagePropertyOrientation.Down;
UIRotationTransform = CGAffineTransform.MakeTranslation(1, 1);
UIRotationTransform = CGAffineTransform.Rotate(UIRotationTransform, (nfloat)Math.PI);
break;
case UIDeviceOrientation.PortraitUpsideDown:
TextOrientation = ImageIO.CGImagePropertyOrientation.Left;
UIRotationTransform = CGAffineTransform.MakeTranslation(1, 0);
UIRotationTransform = CGAffineTransform.Rotate(UIRotationTransform, (nfloat)Math.PI / 2);
break;
default:
TextOrientation = ImageIO.CGImagePropertyOrientation.Right;
UIRotationTransform = CGAffineTransform.MakeTranslation(0, 1);
UIRotationTransform = CGAffineTransform.Rotate(UIRotationTransform, -(nfloat)Math.PI / 2);
break;
}
VisionToAVFTransform = CGAffineTransform.Multiply(ROIToGlobalTransform, BottomToTopTransform);
VisionToAVFTransform = CGAffineTransform.Multiply(VisionToAVFTransform, UIRotationTransform);
}
public ViewController(IntPtr handle) : base(handle)
{
MaskLayer = new CAShapeLayer();
CurrentOrientation = UIDeviceOrientation.Portrait;
captureSession = new AVCaptureSession();
VideoDataOutput = new AVCaptureVideoDataOutput();
VideoDataOutputQueue = new DispatchQueue("VideoDataOutputQueue");
RegionOfInterest = new CGRect(0, 0, 1, 1);
TextOrientation = ImageIO.CGImagePropertyOrientation.Up;
UIRotationTransform = CGAffineTransform.MakeIdentity();
BottomToTopTransform = CGAffineTransform.MakeScale(1, -1);
BottomToTopTransform = CGAffineTransform.Translate(BottomToTopTransform, 0, -1);
ROIToGlobalTransform = CGAffineTransform.MakeIdentity();
gestureRecognizer = new UITapGestureRecognizer((gesture) => {
HandleTap();
});
}
