QRAlignmentPattern.cpp Example File

 // -*- mode:c++; tab-width:2; indent-tabs-mode:nil; c-basic-offset:2 -*-
 /*
  *  AlignmentPattern.cpp
  *  zxing
  *
  *  Created by Christian Brunschen on 13/05/2008.
  *  Copyright 2008 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/qrcode/detector/AlignmentPattern.h>

 using std::abs;
 using zxing::Ref;
 using zxing::qrcode::AlignmentPattern;

 AlignmentPattern::AlignmentPattern(float posX, float posY, float estimatedModuleSize) :
     ResultPoint(posX,posY), estimatedModuleSize_(estimatedModuleSize) {
 }

 bool AlignmentPattern::aboutEquals(float moduleSize, float i, float j) const {
   if (abs(i - getY()) <= moduleSize && abs(j - getX()) <= moduleSize) {
     float moduleSizeDiff = abs(moduleSize - estimatedModuleSize_);
     return moduleSizeDiff <= 1.0f || moduleSizeDiff <= estimatedModuleSize_;
   }
   return false;
 }

 Ref<AlignmentPattern> AlignmentPattern::combineEstimate(float i, float j, float newModuleSize) const {
   float combinedX = (getX() + j) / 2.0f;
   float combinedY = (getY() + i) / 2.0f;
   float combinedModuleSize = (estimatedModuleSize_ + newModuleSize) / 2.0f;
   Ref<AlignmentPattern> result
       (new AlignmentPattern(combinedX, combinedY, combinedModuleSize));
   return result;
 }