csharp/multi/qrcode/QRCodeMultiReader.cs

   1 /*\r
   2 * Copyright 2009 ZXing authors\r
   3 *\r
   4 * Licensed under the Apache License, Version 2.0 (the "License");\r
   5 * you may not use this file except in compliance with the License.\r
   6 * You may obtain a copy of the License at\r
   7 *\r
   8 *      http://www.apache.org/licenses/LICENSE-2.0\r
   9 *\r
  10 * Unless required by applicable law or agreed to in writing, software\r
  11 * distributed under the License is distributed on an "AS IS" BASIS,\r
  12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\r
  13 * See the License for the specific language governing permissions and\r
  14 * limitations under the License.\r
  15 */\r
  16 using System;\r
  17 using BarcodeFormat = com.google.zxing.BarcodeFormat;\r
  18 using BinaryBitmap = com.google.zxing.BinaryBitmap;\r
  19 using ReaderException = com.google.zxing.ReaderException;\r
  20 using Result = com.google.zxing.Result;\r
  21 using ResultMetadataType = com.google.zxing.ResultMetadataType;\r
  22 using ResultPoint = com.google.zxing.ResultPoint;\r
  23 using DecoderResult = com.google.zxing.common.DecoderResult;\r
  24 using DetectorResult = com.google.zxing.common.DetectorResult;\r
  25 using MultipleBarcodeReader = com.google.zxing.multi.MultipleBarcodeReader;\r
  26 using MultiDetector = com.google.zxing.multi.qrcode.detector.MultiDetector;\r
  27 using QRCodeReader = com.google.zxing.qrcode.QRCodeReader;\r
  28 namespace com.google.zxing.multi.qrcode\r
  29 {\r
  30         \r
  31         /// <summary> This implementation can detect and decode multiple QR Codes in an image.\r
  32         /// \r
  33         /// </summary>\r
  34         /// <author>  Sean Owen\r
  35         /// </author>\r
  36         /// <author>  Hannes Erven\r
  37         /// </author>\r
  38         /// <author>www.Redivivus.in (suraj.supekar@redivivus.in) - Ported from ZXING Java Source \r
  39         /// </author>\r
  40 \r
  41         public sealed class QRCodeMultiReader:QRCodeReader, MultipleBarcodeReader\r
  42         {\r
  43                 \r
  44                 //UPGRADE_NOTE: Final was removed from the declaration of 'EMPTY_RESULT_ARRAY '. "ms-help://MS.VSCC.v80/dv_commoner/local/redirect.htm?index='!DefaultContextWindowIndex'&keyword='jlca1003'"\r
  45                 private static readonly Result[] EMPTY_RESULT_ARRAY = new Result[0];\r
  46                 \r
  47                 public Result[] decodeMultiple(BinaryBitmap image)\r
  48                 {\r
  49                         return decodeMultiple(image, null);\r
  50                 }\r
  51                 \r
  52                 public Result[] decodeMultiple(BinaryBitmap image, System.Collections.Hashtable hints)\r
  53                 {\r
  54                         System.Collections.ArrayList results = System.Collections.ArrayList.Synchronized(new System.Collections.ArrayList(10));\r
  55                         DetectorResult[] detectorResult = new MultiDetector(image.BlackMatrix).detectMulti(hints);\r
  56                         for (int i = 0; i < detectorResult.Length; i++)\r
  57                         {\r
  58                                 try\r
  59                                 {\r
  60                                         DecoderResult decoderResult = Decoder.decode(detectorResult[i].Bits);\r
  61                                         ResultPoint[] points = detectorResult[i].Points;\r
  62                                         Result result = new Result(decoderResult.Text, decoderResult.RawBytes, points, BarcodeFormat.QR_CODE);\r
  63                                         if (decoderResult.ByteSegments != null)\r
  64                                         {\r
  65                                                 result.putMetadata(ResultMetadataType.BYTE_SEGMENTS, decoderResult.ByteSegments);\r
  66                                         }\r
  67                                         if (decoderResult.ECLevel != null)\r
  68                                         {\r
  69                                                 result.putMetadata(ResultMetadataType.ERROR_CORRECTION_LEVEL, decoderResult.ECLevel.ToString());\r
  70                                         }\r
  71                                         results.Add(result);\r
  72                                 }\r
  73                                 catch (ReaderException re)\r
  74                                 {\r
  75                                         // ignore and continue \r
  76                                 }\r
  77                         }\r
  78                         if ((results.Count == 0))\r
  79                         {\r
  80                                 return EMPTY_RESULT_ARRAY;\r
  81                         }\r
  82                         else\r
  83                         {\r
  84                                 Result[] resultArray = new Result[results.Count];\r
  85                                 for (int i = 0; i < results.Count; i++)\r
  86                                 {\r
  87                                         resultArray[i] = (Result) results[i];\r
  88                                 }\r
  89                                 return resultArray;\r
  90                         }\r
  91                 }\r
  92         }\r
  93 }