itkMirrorPadImageFilter.h

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/*=========================================================================

  Program:   Insight Segmentation & Registration Toolkit
  Module:    $RCSfile: itkMirrorPadImageFilter.h,v $
  Language:  C++
  Date:      $Date: 2008-10-16 19:33:41 $
  Version:   $Revision: 1.16 $

  Copyright (c) Insight Software Consortium. All rights reserved.
  See ITKCopyright.txt or http://www.itk.org/HTML/Copyright.htm for details.

     This software is distributed WITHOUT ANY WARRANTY; without even 
     the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR 
     PURPOSE.  See the above copyright notices for more information.

=========================================================================*/
#ifndef __itkMirrorPadImageFilter_h
#define __itkMirrorPadImageFilter_h

#include "itkPadImageFilter.h"
#include <vector>

namespace itk
{

template <class TInputImage, class TOutputImage>
class ITK_EXPORT MirrorPadImageFilter:
    public PadImageFilter<TInputImage,TOutputImage>
{
public:
  typedef MirrorPadImageFilter                     Self;
  typedef PadImageFilter<TInputImage,TOutputImage> Superclass;
  typedef SmartPointer<Self>                       Pointer;
  typedef SmartPointer<const Self>                 ConstPointer;

  itkNewMacro(Self); 

  itkTypeMacro(MirrorPadImageFilter, PadImageFilter);

  typedef TInputImage  InputImageType;
  typedef TOutputImage OutputImageType;
  
  typedef typename Superclass::OutputImageRegionType OutputImageRegionType;
  typedef typename Superclass::InputImageRegionType  InputImageRegionType;

  typedef typename Superclass::OutputImagePixelType OutputImagePixelType;
  typedef typename Superclass::InputImagePixelType  InputImagePixelType;

  typedef typename Superclass::OutputImageIndexType OutputImageIndexType;
  typedef typename Superclass::InputImageIndexType  InputImageIndexType;
  typedef typename Superclass::OutputImageSizeType  OutputImageSizeType;
  typedef typename Superclass::InputImageSizeType   InputImageSizeType;

  itkStaticConstMacro(ImageDimension, unsigned int,
                      TInputImage::ImageDimension);

#ifdef ITK_USE_CONCEPT_CHECKING

  itkConceptMacro(InputConvertibleToOutputCheck,
    (Concept::Convertible<InputImagePixelType, OutputImagePixelType>));

#endif

protected:
  MirrorPadImageFilter() {};
  ~MirrorPadImageFilter() {};
  
  void ConvertOutputIndexToInputIndex(OutputImageIndexType & outputIndex, 
                                      InputImageIndexType & inputIndex, 
                                      OutputImageRegionType & outputRegion,
                                      InputImageRegionType & inputRegion,
                                      int* oddRegionArray);

  int RegionIsOdd(long base, long test, long size);

  void ThreadedGenerateData(const OutputImageRegionType& outputRegionForThread,
                            int threadId );

  int GenerateNextInputRegion(long *regIndices, long *regLimit, 
                              std::vector<long>* indices, 
                              std::vector<long>* sizes, 
                              InputImageRegionType& outputRegion);

  int GenerateNextOutputRegion(long *regIndices, long *regLimit, 
                               std::vector<long>* indices, 
                               std::vector<long>* sizes, 
                               OutputImageRegionType& outputRegion);

  int FindRegionsInArea(long start, long end, long size, long offset);

  int BuildInterRegions(std::vector<long>& inputRegionStart, 
                        std::vector<long>& outputRegionStart,
                        std::vector<long>& inputRegionSizes, 
                        std::vector<long>& outputRegionSizes,
                        long inputIndex, long outputIndex,
                        long inputSize, long outputSize, int numRegs, 
                        int & regCtr);

  int BuildPreRegions(std::vector<long>& inputRegionStart, 
                      std::vector<long>& outputRegionStart,
                      std::vector<long>& inputRegionSizes, 
                      std::vector<long>& outputRegionSizes,
                      long inputIndex, long outputIndex,
                      long inputSize, long outputSize, int numRegs, 
                      int & regCtr);

  int BuildPostRegions(std::vector<long>& inputRegionStart, 
                       std::vector<long>& outputRegionStart,
                       std::vector<long>& inputRegionSizes, 
                       std::vector<long>& outputRegionSizes,
                       long inputIndex, long outputIndex,
                       long inputSize, long outputSize, 
                       int numRegs, int & regCtr);

  virtual void GenerateInputRequestedRegion();

private:
  MirrorPadImageFilter(const Self&); //purposely not implemented
  void operator=(const Self&); //purposely not implemented
  
};
  

} // end namespace itk

#ifndef ITK_MANUAL_INSTANTIATION
#include "itkMirrorPadImageFilter.txx"
#endif

#endif

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