cpp/core/src/zxing/qrcode/detector/AlignmentPatternFinder.h

   1 #ifndef __ALIGNMENT_PATTERN_FINDER_H__
   2 #define __ALIGNMENT_PATTERN_FINDER_H__
   3
   4 /*
   5  *  AlignmentPatternFinder.h
   6  *  zxing
   7  *
   8  *  Copyright 2010 ZXing authors All rights reserved.
   9  *
  10  * Licensed under the Apache License, Version 2.0 (the "License");
  11  * you may not use this file except in compliance with the License.
  12  * You may obtain a copy of the License at
  13  *
  14  *      http://www.apache.org/licenses/LICENSE-2.0
  15  *
  16  * Unless required by applicable law or agreed to in writing, software
  17  * distributed under the License is distributed on an "AS IS" BASIS,
  18  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  19  * See the License for the specific language governing permissions and
  20  * limitations under the License.
  21  */
  22
  23 #include "AlignmentPattern.h"
  24 #include <zxing/common/Counted.h>
  25 #include <zxing/common/BitMatrix.h>
  26 #include <vector>
  27
  28 namespace zxing {
  29 namespace qrcode {
  30
  31 class AlignmentPatternFinder : public Counted {
  32 private:
  33   static int CENTER_QUORUM;
  34   static int MIN_SKIP;
  35   static int MAX_MODULES;
  36
  37   Ref<BitMatrix> image_;
  38   std::vector<AlignmentPattern *> *possibleCenters_;
  39   size_t startX_;
  40   size_t startY_;
  41   size_t width_;
  42   size_t height_;
  43   float moduleSize_;
  44
  45   static float centerFromEnd(std::vector<int> &stateCount, int end);
  46   bool foundPatternCross(std::vector<int> &stateCount);
  47
  48   float crossCheckVertical(size_t startI, size_t centerJ, int maxCount, int originalStateCountTotal);
  49
  50   Ref<AlignmentPattern> handlePossibleCenter(std::vector<int> &stateCount, size_t i, size_t j);
  51
  52 public:
  53   AlignmentPatternFinder(Ref<BitMatrix> image, size_t startX, size_t startY, size_t width, size_t height,
  54                          float moduleSize);
  55   ~AlignmentPatternFinder();
  56   Ref<AlignmentPattern> find();
  57
  58 private:
  59   AlignmentPatternFinder(const AlignmentPatternFinder&);
  60   AlignmentPatternFinder& operator =(const AlignmentPatternFinder&);
  61
  62 };
  63 }
  64 }
  65
  66 #endif // __ALIGNMENT_PATTERN_FINDER_H__