C# Result.putAllMetadata方法代码示例

      /// <summary>
      ///   <p>Attempts to decode a one-dimensional barcode format given a single row of
      /// an image.</p>
      /// </summary>
      /// <param name="rowNumber">row number from top of the row</param>
      /// <param name="row">the black/white pixel data of the row</param>
      /// <param name="hints">decode hints</param>
      /// <returns>
      ///   <see cref="Result"/>containing encoded string and start/end of barcode or null if an error occurs or barcode cannot be found
      /// </returns>
      override public Result decodeRow(int rowNumber,
                              BitArray row,
                              IDictionary<DecodeHintType, object> hints)
      {
         // Compute this location once and reuse it on multiple implementations
         int[] startGuardPattern = UPCEANReader.findStartGuardPattern(row);
         if (startGuardPattern == null)
            return null;

         foreach (UPCEANReader reader in readers)
         {
            Result result = reader.decodeRow(rowNumber, row, startGuardPattern, hints);
            if (result == null)
               continue;

            // Special case: a 12-digit code encoded in UPC-A is identical to a "0"
            // followed by those 12 digits encoded as EAN-13. Each will recognize such a code,
            // UPC-A as a 12-digit string and EAN-13 as a 13-digit string starting with "0".
            // Individually these are correct and their readers will both read such a code
            // and correctly call it EAN-13, or UPC-A, respectively.
            //
            // In this case, if we've been looking for both types, we'd like to call it
            // a UPC-A code. But for efficiency we only run the EAN-13 decoder to also read
            // UPC-A. So we special case it here, and convert an EAN-13 result to a UPC-A
            // result if appropriate.
            //
            // But, don't return UPC-A if UPC-A was not a requested format!
            bool ean13MayBeUPCA =
                result.BarcodeFormat == BarcodeFormat.EAN_13 &&
                    result.Text[0] == '0';
            var possibleFormats =
                hints == null || !hints.ContainsKey(DecodeHintType.POSSIBLE_FORMATS) ? null : (IList<BarcodeFormat>)hints[DecodeHintType.POSSIBLE_FORMATS];
            bool canReturnUPCA = possibleFormats == null || possibleFormats.Contains(BarcodeFormat.UPC_A) || possibleFormats.Contains(BarcodeFormat.All_1D);

            if (ean13MayBeUPCA && canReturnUPCA)
            {
               // Transfer the metdata across
               var resultUPCA = new Result(result.Text.Substring(1),
                                              result.RawBytes,
                                              result.ResultPoints,
                                              BarcodeFormat.UPC_A);
               resultUPCA.putAllMetadata(result.ResultMetadata);
               return resultUPCA;
            }
            return result;
         }

         return null;
      }

 private static Result translateResultPoints(Result result, int xOffset, int yOffset)
 {
    var oldResultPoints = result.ResultPoints;
    var newResultPoints = new ResultPoint[oldResultPoints.Length];
    for (int i = 0; i < oldResultPoints.Length; i++)
    {
       var oldPoint = oldResultPoints[i];
       if (oldPoint != null)
       {
          newResultPoints[i] = new ResultPoint(oldPoint.X + xOffset, oldPoint.Y + yOffset);
       }
    }
    var newResult = new Result(result.Text, result.RawBytes, newResultPoints, result.BarcodeFormat);
    newResult.putAllMetadata(result.ResultMetadata);
    return newResult;
 }