public void Dispose()
{
this.fingerDetectionTimer.Change(Timeout.Infinite, Timeout.Infinite);
this.fingerDetectionTimer.Dispose();
LibScanApi.ftrScanCloseDevice(this.handle);
}
private void FingerDetectionCallback(object state)
{
var result = LibScanApi.ftrScanIsFingerPresent(this.handle, out pFrameParameters);
if (!result)
{
// There could be an error
// var error = LibScanApi.GetLastError();
return;
}
var lastFingerDetectedResult = pFrameParameters.nContrastOnDose2 > FingerDetectionContrastThreshold;
if (lastFingerDetectedResult && !this.IsFingerPresent)
{
this.IsFingerPresent = true;
this.OnFingerDetected();
}
if (!lastFingerDetectedResult && this.IsFingerPresent)
{
this.IsFingerPresent = false;
this.OnFingerReleased();
}
}
public Bitmap ReadFingerprint()
{
var t = new LibScanApi._FTRSCAN_IMAGE_SIZE();
LibScanApi.ftrScanGetImageSize(this.handle, out t);
byte[] arr = new byte[t.nImageSize];
LibScanApi.ftrScanGetImage(this.handle, NDose, arr);
var width = t.nWidth;
var height = t.nHeight;
var image = new Bitmap(width, height, System.Drawing.Imaging.PixelFormat.Format24bppRgb);
for (int y = 0; y < height; y++)
{
for (int x = 0; x < width; x++)
{
byte a = (byte)(0xFF - arr[(y * width) + x]);
image.SetPixel(x, y, Color.FromArgb(a, a, a));
}
}
return(image);
}
public LedState GetLedState()
{
LibScanApi.ftrScanGetDiodesStatus(this.handle, out greenIsOn, out redIsOn);
return(new LedState()
{
GreenIsOn = greenIsOn,
RedIsOn = redIsOn,
});
}
public FingerprintDevice AccessFingerprintDevice()
{
var handle = LibScanApi.ftrScanOpenDevice();
if (handle != IntPtr.Zero)
{
return(new FingerprintDevice(handle));
}
throw new Exception("Cannot open device");
}
protected void SetRedLed(bool state)
{
lock (this.ledStatusWritingLock)
{
LibScanApi.ftrScanGetDiodesStatus(this.handle, out greenIsOn, out redIsOn);
redIsOn = state;
LibScanApi.ftrScanSetDiodesStatus(this.handle, (byte)(greenIsOn ? 255 : 0), (byte)(redIsOn ? 255 : 0));
}
}
public void SwitchLedState(bool green, bool red)
{
LibScanApi.ftrScanSetDiodesStatus(this.handle, (byte)(green ? 255 : 0), (byte)(red ? 255 : 0));
}
