itkMatrixIndexSelectionImageFilter.h

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

  Program:   Insight Segmentation & Registration Toolkit
  Module:    $RCSfile: itkMatrixIndexSelectionImageFilter.h,v $
  Language:  C++
  Date:      $Date: 2008-10-16 18:05:25 $
  Version:   $Revision: 1.6 $

  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 __itkMatrixIndexSelectionImageFilter_h
#define __itkMatrixIndexSelectionImageFilter_h

#include "itkUnaryFunctorImageFilter.h"

namespace itk
{
  
namespace Functor {  
  
template< class TInput, class TOutput>
class MatrixIndexSelection
{
public:
  MatrixIndexSelection() {m_I = m_J = 0;}
  ~MatrixIndexSelection() {}

  void GetIndices(unsigned int& i, unsigned int& j) const {i= m_I; j=m_J;}
  void SetIndices(unsigned int i,unsigned int j) {m_I= i; m_J =j;}

  bool operator!=( const MatrixIndexSelection & other ) const
    {
    if( m_I != other.m_I ||
        m_J != other.m_J  )
      {
      return true;
      }
    return false;
    }
  bool operator==( const MatrixIndexSelection & other ) const
    {
    return !(*this != other);
    }

  inline TOutput operator()( const TInput & A )
    {
    return static_cast<TOutput>( A[m_I][m_J] );
    }
      
private:
  unsigned int m_I;
  unsigned int m_J;
}; 
}

template <class TInputImage, class TOutputImage>
class ITK_EXPORT MatrixIndexSelectionImageFilter :
    public
UnaryFunctorImageFilter<TInputImage,TOutputImage,Functor::MatrixIndexSelection< typename TInputImage::PixelType,typename TOutputImage::PixelType> >
{
public:
  typedef MatrixIndexSelectionImageFilter Self;
  typedef UnaryFunctorImageFilter<TInputImage,TOutputImage,Functor::MatrixIndexSelection<typename TInputImage::PixelType,typename TOutputImage::PixelType> > Superclass;
  typedef SmartPointer<Self>       Pointer;
  typedef SmartPointer<const Self> ConstPointer;

  itkTypeMacro( MatrixIndexSelectionImageFilter, UnaryFunctorImageFilter );

  itkNewMacro(Self);

  void SetIndices(unsigned int i, unsigned int j)
    {
    this->GetFunctor().SetIndices(i,j);
    this->Modified();
    }

  void GetIndices(unsigned int& i, unsigned int& j) const
    { return this->GetFunctor().GetIndices(i,j); }

#ifdef ITK_USE_CONCEPT_CHECKING

  itkConceptMacro(InputHasNumericTraitsCheck,
    (Concept::HasNumericTraits<typename TInputImage::PixelType::ValueType>));

#endif

protected:
  MatrixIndexSelectionImageFilter() {}
  virtual ~MatrixIndexSelectionImageFilter() {}
    
private:
  MatrixIndexSelectionImageFilter(const Self&); //purposely not implemented
  void operator=(const Self&); //purposely not implemented
};
 
} // end namespace itk


#endif