Detector.h Example File

 // -*- mode:c++; tab-width:2; indent-tabs-mode:nil; c-basic-offset:2 -*-
 #ifndef __DETECTOR_H__
 #define __DETECTOR_H__

 /*
  *  Detector.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 <zxing/common/Counted.h>
 #include <zxing/common/DetectorResult.h>
 #include <zxing/common/BitMatrix.h>
 #include <zxing/qrcode/detector/AlignmentPattern.h>
 #include <zxing/common/PerspectiveTransform.h>
 #include <zxing/ResultPointCallback.h>
 #include <zxing/qrcode/detector/FinderPatternInfo.h>

 namespace zxing {

 class DecodeHints;

 namespace qrcode {

 class Detector : public Counted {
 private:
   Ref<BitMatrix> image_;
   Ref<ResultPointCallback> callback_;

 protected:
   Ref<BitMatrix> getImage() const;
   Ref<ResultPointCallback> getResultPointCallback() const;

   static Ref<BitMatrix> sampleGrid(Ref<BitMatrix> image, int dimension, Ref<PerspectiveTransform>);
   static int computeDimension(Ref<ResultPoint> topLeft, Ref<ResultPoint> topRight, Ref<ResultPoint> bottomLeft,
                               float moduleSize);
   float calculateModuleSize(Ref<ResultPoint> topLeft, Ref<ResultPoint> topRight, Ref<ResultPoint> bottomLeft);
   float calculateModuleSizeOneWay(Ref<ResultPoint> pattern, Ref<ResultPoint> otherPattern);
   float sizeOfBlackWhiteBlackRunBothWays(int fromX, int fromY, int toX, int toY);
   float sizeOfBlackWhiteBlackRun(int fromX, int fromY, int toX, int toY);
   Ref<AlignmentPattern> findAlignmentInRegion(float overallEstModuleSize, int estAlignmentX, int estAlignmentY,
       float allowanceFactor);
   Ref<DetectorResult> processFinderPatternInfo(Ref<FinderPatternInfo> info);
 public:
   virtual Ref<PerspectiveTransform> createTransform(Ref<ResultPoint> topLeft, Ref<ResultPoint> topRight, Ref <
       ResultPoint > bottomLeft, Ref<ResultPoint> alignmentPattern, int dimension);

   Detector(Ref<BitMatrix> image);
   Ref<DetectorResult> detect(DecodeHints const& hints);

 };
 }
 }

 #endif // __DETECTOR_H__