itkAdaptImageFilter.h

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

  Program:   Insight Segmentation & Registration Toolkit
  Module:    $RCSfile: itkAdaptImageFilter.h,v $
  Language:  C++
  Date:      $Date: 2002/10/01 00:59:34 $
  Version:   $Revision: 1.13 $

  Copyright (c) 2002 Insight 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 __itkAdaptImageFilter_h
#define __itkAdaptImageFilter_h

#include "itkUnaryFunctorImageFilter.h"

namespace itk
{

namespace Functor {  
  
  template <class TInput, class TAccessor>
  class AccessorFunctor
  {
  public:
    typedef AccessorFunctor Self;
    typedef TAccessor AccessorType;

    AccessorFunctor(): m_Accessor() {}
    ~AccessorFunctor() {}

    typedef typename TAccessor::ExternalType OutputType;
    inline OutputType operator()( const TInput & A )
      { return m_Accessor.Get( A ); }

    AccessorType& GetAccessor() 
      { return m_Accessor; }

    AccessorFunctor & operator=( const AccessorFunctor & functor )
     { m_Accessor = functor.m_Accessor; 
       return *this;}

    void SetAccessor(AccessorType& accessor) 
      { m_Accessor = accessor; };

    bool operator!=( const Self& functor ) const
      { return (m_Accessor != functor.m_Accessor); }
    
  private:
    AccessorType m_Accessor;
  }; 
}

template <class TInputImage, class TOutputImage, class TAccessor>
class ITK_EXPORT AdaptImageFilter:
    public UnaryFunctorImageFilter<TInputImage,TOutputImage,Functor::AccessorFunctor<ITK_TYPENAME TInputImage::PixelType, TAccessor> >
{
public:
  typedef AdaptImageFilter  Self;
  typedef UnaryFunctorImageFilter< TInputImage,
                                   TOutputImage,
                                   Functor::AccessorFunctor<
                                      ITK_TYPENAME TInputImage::PixelType, 
                                      TAccessor> >  Superclass;

  typedef SmartPointer<Self>   Pointer;
  typedef SmartPointer<const Self>  ConstPointer;
  typedef typename Superclass::FunctorType FunctorType;

  itkNewMacro(Self);

  typedef TAccessor AccessorType;
  
  itkTypeMacro(AdaptImageFilter, UnaryFunctorImageFilter);

  AccessorType& GetAccessor() { return this->GetFunctor().GetAccessor(); };

  void SetAccessor(AccessorType& accessor)
  {
    FunctorType functor;
    functor = this->GetFunctor();
    if (accessor != functor.GetAccessor())
      {
      functor.SetAccessor( accessor );
      this->SetFunctor( functor );
      this->Modified();
      }
  }

protected:
  AdaptImageFilter() {}
  virtual ~AdaptImageFilter() {}

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

};

  
} // end namespace itk
  
#endif

---