otbUnaryFunctorWithIndexImageFilter.txx

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

  Program:   ORFEO Toolbox
  Language:  C++
  Date:      $Date$
  Version:   $Revision$


  Copyright (c) Centre National d'Etudes Spatiales. All rights reserved.
  See OTBCopyright.txt 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 __otbUnaryFunctorWithIndexImageFilter_txx
#define __otbUnaryFunctorWithIndexImageFilter_txx

#include "otbUnaryFunctorWithIndexImageFilter.h"
#include "itkImageRegionIterator.h"
#include "itkProgressReporter.h"

namespace otb
{
template <class TInputImage, class TOutputImage, class TFunction>
UnaryFunctorWithIndexImageFilter<TInputImage, TOutputImage, TFunction>
::UnaryFunctorWithIndexImageFilter()
{
  this->SetNumberOfRequiredInputs(1);
}
template <class TInputImage, class TOutputImage, class TFunction>
void
UnaryFunctorWithIndexImageFilter<TInputImage, TOutputImage, TFunction>
::GenerateInputRequestedRegion()
{
  // call the superclass' implementation of this method
  Superclass::GenerateInputRequestedRegion();

  // get pointers to the input and output
  typename Superclass::InputImagePointer inputPtr =
    const_cast<TInputImage *>(this->GetInput());
  typename Superclass::OutputImagePointer outputPtr = this->GetOutput();

  if (!inputPtr || !outputPtr)
    {
    return;
    }
  // get a copy of the input requested region (should equal the output
  // requested region)
  typename TInputImage::RegionType inputRequestedRegion;
  inputRequestedRegion = inputPtr->GetRequestedRegion();

  // crop the input requested region at the input's largest possible region
  if (inputRequestedRegion.Crop(inputPtr->GetLargestPossibleRegion()))
    {
    inputPtr->SetRequestedRegion(inputRequestedRegion);
    return;
    }
  else
    {
    // Couldn't crop the region (requested region is outside the largest
    // possible region).  Throw an exception.

    // store what we tried to request (prior to trying to crop)
    inputPtr->SetRequestedRegion(inputRequestedRegion);

    // build an exception
    itk::InvalidRequestedRegionError e(__FILE__, __LINE__);
    std::ostringstream msg;
    msg << this->GetNameOfClass()
        << "::GenerateInputRequestedRegion()";
    e.SetLocation(msg.str().c_str());
    e.SetDescription("Requested region is (at least partially) outside the largest possible region.");
    e.SetDataObject(inputPtr);
    throw e;
    }
}

template <class TInputImage, class TOutputImage, class TFunction>
void
UnaryFunctorWithIndexImageFilter<TInputImage, TOutputImage, TFunction>
::ThreadedGenerateData(const OutputImageRegionType& outputRegionForThread, int threadId)
{
  InputImagePointer  inputPtr = dynamic_cast<const TInputImage*>(ProcessObjectType::GetInput(0));
  OutputImagePointer outputPtr = this->GetOutput(0);

  InputImageRegionType inputRegionForThread;
  this->CallCopyOutputRegionToInputRegion(inputRegionForThread, outputRegionForThread);

  // Define the iterators
  IteratorType inputIt = IteratorType(inputPtr, inputRegionForThread);
  itk::ImageRegionIterator<TOutputImage> outputIt(outputPtr, outputRegionForThread);

  itk::ProgressReporter progress(this, threadId, outputRegionForThread.GetNumberOfPixels());

  inputIt.GoToBegin();
  outputIt.GoToBegin();

  while (!inputIt.IsAtEnd())
    {
    outputIt.Set(m_Functor(inputIt.Get(), inputIt.GetIndex()));
    ++inputIt;
    ++outputIt;
    progress.CompletedPixel();    // potential exception thrown here
    }

}

} // end namespace otb

#endif