private void ProcessImage(BarcodeCaptureResult captureResults) {
captureResults.State = CaptureState.Processing;
try {
bool bIsReady = captureResults.isReadyForProcessing.WaitOne(3000);
if (!bIsReady) {
captureResults.State = CaptureState.UnknownError;
captureResults.ErrorMessage = "Error: Timeout waiting for images to be processed. Please try again or send issue report using app bar.";
return;
}
if (captureResults.VGABarcodeImage != null)
{
var wb = captureResults.VGABarcodeImage;
//Code from: btnReadTag_Click in "SLZXingQRSample\SLZXingQRSample\SLZXingSample\MainPage.xaml.vb"
var qrRead = new com.google.zxing.oned.MultiFormatUPCEANReader(zxingHints); ; // new com.google.zxing.qrcode.QRCodeReader();
var luminiance = new RGBLuminanceSource(wb, 640, 480);
var binarizer = new com.google.zxing.common.HybridBinarizer(luminiance);
var binBitmap = new com.google.zxing.BinaryBitmap(binarizer);
var results = qrRead.decode(binBitmap, zxingHints); //NOTE: will throw exception if cannot decode image.
captureResults.BarcodeText = results.Text;
captureResults.State = CaptureState.Success;
BarcodeCaptured.Invoke(captureResults);
//captureResults.ProcessValue();
}
else {
captureResults.State = CaptureState.UnknownError;
captureResults.ErrorMessage = "Cannot process image: invalid or null BitmapImage.";
}
}
catch (Exception ex) {
captureResults.ExceptionThrown = ex;
if (ex is com.google.zxing.ReaderException) {
captureResults.ErrorMessage = "Error: Cannot decode barcode image. Please make sure scan mode is correct and try again.";
captureResults.State = CaptureState.ScanFailed;
}
else {
Debug.WriteLine("Error: " + ex.ToString());
captureResults.ErrorMessage = String.Format("Barcode Library Processing Error: {0}\r\n{1}", ex.GetType(), ex.Message);
captureResults.State = CaptureState.UnknownError;
}
}
finally
{
lock (_resultTaskLock)
{
_resultTask = null;
}
}
}
private BarcodeCaptureResult CreateBarcodeCapture(WriteableBitmap bitmapIn)
{
BarcodeCaptureResult ret = null;
using (var are = new System.Threading.AutoResetEvent(false)) //Use AutoResetEvent to wait for results from dispatcher
{
WP7Utilities.UIThreadInvoke(() =>
{
ret = new BarcodeCaptureResult(bitmapIn);
are.Set();
});
are.WaitOne();
}
return ret;
}
