AlignmentPatternFinder.h Example File

 #ifndef __ALIGNMENT_PATTERN_FINDER_H__
 #define __ALIGNMENT_PATTERN_FINDER_H__

 /*
  *  AlignmentPatternFinder.h
  *  zxing
  *
  *  Copyright 2010 ZXing authors All rights reserved.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
  * You may obtain a copy of the License at
  *
  *      http://www.apache.org/licenses/LICENSE-2.0
  *
  * Unless required by applicable law or agreed to in writing, software
  * distributed under the License is distributed on an "AS IS" BASIS,
  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */

 #include "AlignmentPattern.h"
 #include <zxing/common/Counted.h>
 #include <zxing/common/BitMatrix.h>
 #include <zxing/ResultPointCallback.h>
 #include <vector>

 namespace zxing {
 namespace qrcode {

 class AlignmentPatternFinder : public Counted {
 private:
   static int CENTER_QUORUM;
   static int MIN_SKIP;
   static int MAX_MODULES;

   Ref<BitMatrix> image_;
   std::vector<AlignmentPattern *> *possibleCenters_;
   int startX_;
   int startY_;
   int width_;
   int height_;
   float moduleSize_;

   static float centerFromEnd(std::vector<int> &stateCount, int end);
   bool foundPatternCross(std::vector<int> &stateCount);

   float crossCheckVertical(int startI, int centerJ, int maxCount, int originalStateCountTotal);

   Ref<AlignmentPattern> handlePossibleCenter(std::vector<int> &stateCount, int i, int j);

 public:
   AlignmentPatternFinder(Ref<BitMatrix> image, int startX, int startY, int width, int height,
                          float moduleSize, Ref<ResultPointCallback>const& callback);
   ~AlignmentPatternFinder();
   Ref<AlignmentPattern> find();

 private:
   AlignmentPatternFinder(const AlignmentPatternFinder&);
   AlignmentPatternFinder& operator =(const AlignmentPatternFinder&);

   Ref<ResultPointCallback> callback_;
 };
 }
 }

 #endif // __ALIGNMENT_PATTERN_FINDER_H__