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 <zxing/ResultPointCallback.h>
  27 #include <vector>
  28
  29 namespace zxing {
  30 namespace qrcode {
  31
  32 class AlignmentPatternFinder : public Counted {
  33 private:
  34   static int CENTER_QUORUM;
  35   static int MIN_SKIP;
  36   static int MAX_MODULES;
  37
  38   Ref<BitMatrix> image_;
  39   std::vector<AlignmentPattern *> *possibleCenters_;
  40   size_t startX_;
  41   size_t startY_;
  42   size_t width_;
  43   size_t height_;
  44   float moduleSize_;
  45
  46   static float centerFromEnd(std::vector<int> &stateCount, int end);
  47   bool foundPatternCross(std::vector<int> &stateCount);
  48
  49   float crossCheckVertical(size_t startI, size_t centerJ, int maxCount, int originalStateCountTotal);
  50
  51   Ref<AlignmentPattern> handlePossibleCenter(std::vector<int> &stateCount, size_t i, size_t j);
  52
  53 public:
  54   AlignmentPatternFinder(Ref<BitMatrix> image, size_t startX, size_t startY, size_t width, size_t height,
  55                          float moduleSize, Ref<ResultPointCallback>const& callback);
  56   ~AlignmentPatternFinder();
  57   Ref<AlignmentPattern> find();
  58
  59 private:
  60   AlignmentPatternFinder(const AlignmentPatternFinder&);
  61   AlignmentPatternFinder& operator =(const AlignmentPatternFinder&);
  62
  63   Ref<ResultPointCallback> callback_;
  64 };
  65 }
  66 }
  67
  68 #endif // __ALIGNMENT_PATTERN_FINDER_H__