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/*=========================================================================
Program: Insight Segmentation & Registration Toolkit
Module: $RCSfile: itkNaryFunctorImageFilter.txx,v $
Language: C++
Date: $Date: 2007-04-04 12:43:52 $
Version: $Revision: 1.21 $
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 _itkNaryFunctorImageFilter_txx
#define _itkNaryFunctorImageFilter_txx
#include "itkNaryFunctorImageFilter.h"
#include "itkImageRegionIterator.h"
#include "itkProgressReporter.h"
namespace itk
{
/**
* Constructor
*/
template <class TInputImage, class TOutputImage, class TFunction >
NaryFunctorImageFilter<TInputImage,TOutputImage,TFunction>
::NaryFunctorImageFilter()
{
// This number will be incremented each time an image
// is added over the two minimum required
this->SetNumberOfRequiredInputs( 2 );
this->InPlaceOff();
}
/**
* ThreadedGenerateData Performs the pixel-wise addition
*/
template <class TInputImage, class TOutputImage, class TFunction>
void
NaryFunctorImageFilter<TInputImage, TOutputImage, TFunction>
::ThreadedGenerateData( const OutputImageRegionType &outputRegionForThread,
int threadId)
{
const unsigned int numberOfInputImages =
static_cast< unsigned int >( this->GetNumberOfInputs() );
OutputImagePointer outputPtr = this->GetOutput(0);
ImageRegionIterator<TOutputImage> outputIt(outputPtr, outputRegionForThread);
// Clear the content of the output
outputIt.GoToBegin();
while( !outputIt.IsAtEnd() )
{
outputIt.Set( itk::NumericTraits< OutputImagePixelType >::Zero );
++outputIt;
}
typedef ImageRegionConstIterator<TInputImage> ImageRegionConstIteratorType;
std::vector< ImageRegionConstIteratorType * > inputItrVector;
inputItrVector.resize(numberOfInputImages);
//Array< ImageRegionConstIteratorType > inputItrVector(numberOfInputImages);
// support progress methods/callbacks.
// count the number of inputs that are non-null
unsigned int lastValidImage = 0;
for (unsigned int i=0; i < numberOfInputImages; ++i)
{
InputImagePointer inputPtr =
dynamic_cast<TInputImage*>( ProcessObject::GetInput( i ) );
if (inputPtr)
{
ImageRegionConstIteratorType *inputIt = new ImageRegionConstIteratorType(inputPtr,outputRegionForThread);
lastValidImage = i;
inputItrVector[i] = reinterpret_cast< ImageRegionConstIteratorType * >( inputIt );
inputItrVector[i]->GoToBegin();
}
else
{
inputItrVector[i] = reinterpret_cast< ImageRegionConstIteratorType * >(NULL);
}
}
ProgressReporter progress(this, threadId,
outputRegionForThread.GetNumberOfPixels());
if( !inputItrVector[lastValidImage] )
{
//No valid regions in the thread
return;
}
NaryArrayType naryInputArray;
naryInputArray.resize( numberOfInputImages );
outputIt.GoToBegin();
while( !inputItrVector[lastValidImage]->IsAtEnd())
{
for (unsigned int inputNumber=0; inputNumber < numberOfInputImages; inputNumber++)
{
naryInputArray[ inputNumber ] = inputItrVector[inputNumber]->Get();
++(*inputItrVector[inputNumber]);
}
outputIt.Set( m_Functor( naryInputArray ) );
++outputIt;
progress.CompletedPixel();
}
for (unsigned int i=0; i < numberOfInputImages; ++i)
{
if (inputItrVector[i])
{
delete inputItrVector[i];
}
}
}
} // end namespace itk
#endif
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