// -------------------------------------------------------------------------
// @author Leonardo Florez-Valencia (florez-l@javeriana.edu.co)
// -------------------------------------------------------------------------

#ifndef __CPEXTENSIONS__ALGORITHMS__RGBIMAGETOOTHERCHANNELSFILTER__HXX__
#define __CPEXTENSIONS__ALGORITHMS__RGBIMAGETOOTHERCHANNELSFILTER__HXX__

#include <cmath>
#include <limits>
#include <vnl/vnl_math.h>

#include <itkImageRegionIterator.h>
#include <itkImageRegionConstIterator.h>

// -------------------------------------------------------------------------
template< class I, class O, class C >
cpExtensions::Algorithms::RGBImageToOtherChannelsFilter< I, O, C >::
RGBImageToOtherChannelsFilter( )
  : Superclass( )
{
  this->SetNumberOfRequiredInputs( 1 );
  this->SetNumberOfRequiredOutputs( 1 );

  typename O::Pointer o = O::New( );
  this->SetNthOutput( 0, o );
}

// -------------------------------------------------------------------------
template< class I, class O, class C >
cpExtensions::Algorithms::RGBImageToOtherChannelsFilter< I, O, C >::
~RGBImageToOtherChannelsFilter( )
{
}

// -------------------------------------------------------------------------
template< class I, class O, class C >
void cpExtensions::Algorithms::RGBImageToOtherChannelsFilter< I, O, C >::
BeforeThreadedGenerateData( )
{
}

// -------------------------------------------------------------------------
template< class I, class O, class C >
void cpExtensions::Algorithms::RGBImageToOtherChannelsFilter< I, O, C >::
AfterThreadedGenerateData( )
{
}

// -------------------------------------------------------------------------
template< class I, class O, class C >
void cpExtensions::Algorithms::RGBImageToOtherChannelsFilter< I, O, C >::
ThreadedGenerateData(
  const typename Superclass::OutputImageRegionType& region,
  itk::ThreadIdType threadId
  )
{
  // typedef typename TInputPixel::ComponentType _TComponent;
  typedef itk::ImageRegionConstIterator< I > _TInIt;
  typedef itk::ImageRegionIterator< O >      _TOutIt;

  _TInIt inIt( this->GetInput( ), region );
  _TOutIt outIt( this->GetOutput( ), region );
  inIt.GoToBegin( );
  outIt.GoToBegin( );
  for( ; !inIt.IsAtEnd( ); ++inIt, ++outIt )
    outIt.Set( this->Converter( inIt.Get( ) ) );
}

#endif // __CPEXTENSIONS__ALGORITHMS__RGBIMAGETOOTHERCHANNELSFILTER__HXX__

// eof - $RCSfile$