cpp/core/src/zxing/MultiFormatReader.cpp

   1 /*
   2  *  MultiFormatBarcodeReader.cpp
   3  *  ZXing
   4  *
   5  *  Created by Lukasz Warchol on 10-01-26.
   6  *  Modified by Luiz Silva on 09/02/2010.
   7  *  Copyright 2010 ZXing authors All rights reserved.
   8  *
   9  * Licensed under the Apache License, Version 2.0 (the "License");
  10  * you may not use this file except in compliance with the License.
  11  * You may obtain a copy of the License at
  12  *
  13  *      http://www.apache.org/licenses/LICENSE-2.0
  14  *
  15  * Unless required by applicable law or agreed to in writing, software
  16  * distributed under the License is distributed on an "AS IS" BASIS,
  17  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  18  * See the License for the specific language governing permissions and
  19  * limitations under the License.
  20  */
  21
  22 #include <zxing/MultiFormatReader.h>
  23 #include <zxing/qrcode/QRCodeReader.h>
  24 #include <zxing/datamatrix/DataMatrixReader.h>
  25 #include <zxing/oned/MultiFormatUPCEANReader.h>
  26 #include <zxing/oned/MultiFormatOneDReader.h>
  27 #include <zxing/ReaderException.h>
  28
  29 namespace zxing {
  30         MultiFormatReader::MultiFormatReader() {
  31
  32         }
  33
  34         Ref<Result> MultiFormatReader::decode(Ref<BinaryBitmap> image) {
  35           setHints(DecodeHints::DEFAULT_HINT);
  36           return decodeInternal(image);
  37         }
  38
  39         Ref<Result> MultiFormatReader::decode(Ref<BinaryBitmap> image, DecodeHints hints) {
  40     setHints(hints);
  41     return decodeInternal(image);
  42   }
  43
  44   Ref<Result> MultiFormatReader::decodeWithState(Ref<BinaryBitmap> image) {
  45     // Make sure to set up the default state so we don't crash
  46     if (readers_.size() == 0) {
  47       setHints(DecodeHints::DEFAULT_HINT);
  48     }
  49     return decodeInternal(image);
  50   }
  51
  52   void MultiFormatReader::setHints(DecodeHints hints) {
  53     hints_ = hints;
  54     readers_.clear();
  55     bool tryHarder = hints.getTryHarder();
  56
  57     bool addOneDReader = hints.containsFormat(BarcodeFormat_UPC_E) ||
  58                          hints.containsFormat(BarcodeFormat_UPC_A) ||
  59                          hints.containsFormat(BarcodeFormat_EAN_8) ||
  60                          hints.containsFormat(BarcodeFormat_EAN_13) ||
  61                          hints.containsFormat(BarcodeFormat_CODE_128) ||
  62                          hints.containsFormat(BarcodeFormat_CODE_39) ||
  63                          hints.containsFormat(BarcodeFormat_ITF);
  64     if (addOneDReader && !tryHarder) {
  65       readers_.push_back(new zxing::oned::MultiFormatOneDReader(hints));
  66     }
  67     if (hints.containsFormat(BarcodeFormat_QR_CODE)) {
  68       readers_.push_back(new zxing::qrcode::QRCodeReader());
  69     }
  70     if (hints.containsFormat(BarcodeFormat_DATA_MATRIX)) {
  71       readers_.push_back(new zxing::datamatrix::DataMatrixReader());
  72     }
  73     //TODO: add PDF417 here once PDF417 reader is implemented
  74     if (addOneDReader && tryHarder) {
  75       readers_.push_back(new zxing::oned::MultiFormatOneDReader(hints));
  76     }
  77     if (readers_.size() == 0) {
  78       if (!tryHarder) {
  79         readers_.push_back(new zxing::oned::MultiFormatOneDReader(hints));
  80       }
  81       readers_.push_back(new zxing::qrcode::QRCodeReader());
  82       if (tryHarder) {
  83         readers_.push_back(new zxing::oned::MultiFormatOneDReader(hints));
  84       }
  85     }
  86   }
  87
  88         Ref<Result> MultiFormatReader::decodeInternal(Ref<BinaryBitmap> image) {
  89                 for (unsigned int i = 0; i < readers_.size(); i++) {
  90                         try {
  91                                 return readers_[i]->decode(image, hints_);
  92                         } catch (ReaderException re) {
  93                                 // continue
  94                         }
  95                 }
  96                 throw ReaderException("No code detected");
  97         }
  98
  99         MultiFormatReader::~MultiFormatReader(){
 100                 for (unsigned int i = 0; i < readers_.size(); i++) {
 101                         delete readers_[i];
 102                 }
 103         }
 104 }