private void Worker()
{
if (hints == null)
{
hints = new Hashtable();
hints.Add(com.google.zxing.DecodeHintType.POSSIBLE_FORMATS, this.Options.GetFormats());
hints.Add(com.google.zxing.DecodeHintType.NEED_RESULT_POINT_CALLBACK, new ResultCallBack(this));
}
if (_multiFormatReader == null)
{
//_multiFormatReader = new com.google.zxing.oned.MultiFormatOneDReader(hints);
_multiFormatReader = new com.google.zxing.MultiFormatReader();
_multiFormatReader.Hints = hints;
//_multiFormatReader = new MultiFormatReader {
// Hints = new Hashtable {
// { DecodeHintType.POSSIBLE_FORMATS, new ArrayList {
// BarcodeFormat.UPC_A, BarcodeFormat.UPC_E , BarcodeFormat.CODE_128,
// BarcodeFormat.CODE_39, BarcodeFormat.EAN_13, BarcodeFormat.EAN_8
// } }
// }
// };
}
using (var ap = new NSAutoreleasePool())
{
// Capturing screen image
using (var screenImage = CGImage.ScreenImage.WithImageInRect(picFrame)) //.WithImageInRect(picFrame))
{
using (var _theScreenImage = UIImage.FromImage(screenImage))
using (var srcbitmap = new Bitmap(_theScreenImage))
{
LuminanceSource source = null;
BinaryBitmap bitmap = null;
try
{
//Console.WriteLine(screenImage.Width.ToString() + " x " + screenImage.Height.ToString());
//var cropY = (int)((screenImage.Height * 0.4) / 2);
source = new RGBLuminanceSource(srcbitmap, screenImage.Width, screenImage.Height); //.crop(0, cropY, 0, screenImage.Height - cropY - cropY);
//Console.WriteLine(source.Width + " x " + source.Height);
bitmap = new BinaryBitmap(new HybridBinarizer(source));
try
{
var result = _multiFormatReader.decodeWithState(bitmap); //
//var result = _multiFormatReader.decodeWithState (bitmap);
//srcbitmap.Dispose();
if (result.Text != null)
{
//BeepOrVibrate();
_parentViewController.BarCodeScanned(result);
}
}
catch (ReaderException)
{
}
/*
* com.google.zxing.common.BitArray row = new com.google.zxing.common.BitArray(screenImage.Width);
*
* int middle = screenImage.Height >> 1;
* int rowStep = System.Math.Max(1, screenImage.Height >> (4));
*
* for (int x = 0; x < 9; x++)
* {
*
* // Scanning from the middle out. Determine which row we're looking at next:
* int rowStepsAboveOrBelow = (x + 1) >> 1;
* bool isAbove = (x & 0x01) == 0; // i.e. is x even?
* int rowNumber = middle + rowStep * (isAbove?rowStepsAboveOrBelow:- rowStepsAboveOrBelow);
* if (rowNumber < 0 || rowNumber >= screenImage.Height)
* {
* // Oops, if we run off the top or bottom, stop
* break;
* }
*
* // Estimate black point for this row and load it:
* try
* {
* row = bitmap.getBlackRow(rowNumber, row);
*
*
* var resultb = _multiFormatReader.decodeRow(rowNumber, row, hints);
* if(resultb.Text!=null)
* {
* Console.WriteLine("SCANNED");
* BeepOrVibrate();
* _parentViewController.BarCodeScanned(resultb);
*
*
* break;
* }
* else {
* continue;
* }
*
* }
* catch (ReaderException re)
* {
* continue;
* }
*
* }
*/
// var result = _barcodeReader.decodeWithState(bitmap);
//
// if(result.Text!=null)
// {
// _multiFormatOneDReader = null;
// BeepOrVibrate();
// _parentViewController.BarCodeScanned(result);
// }
} catch (Exception ex) {
Console.WriteLine(ex.Message);
}
finally {
if (bitmap != null)
{
bitmap = null;
}
if (source != null)
{
source = null;
}
// if(srcbitmap!=null)
// srcbitmap = null;
//if (_theScreenImage != null)
// _theScreenImage = null;
}
}
}
}
GC.Collect();
//Console.WriteLine("Done.");
}
