itkUnaryFunctorWithIndexImageFilter.h

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 *
 *  Copyright Insight Software Consortium
 *
 *  Licensed under the Apache License, Version 2.0 (the "License");
 *  you may not use this file except in compliance with the License.
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 *
 *         http://www.apache.org/licenses/LICENSE-2.0.txt
 *
 *  Unless required by applicable law or agreed to in writing, software
 *  distributed under the License is distributed on an "AS IS" BASIS,
 *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *  See the License for the specific language governing permissions and
 *  limitations under the License.
 *
 *=========================================================================*/
//
//  Created by Jean-Marie Mirebeau on 07/03/2014.
//
//

#ifndef itkUnaryFunctorWithIndexImageFilter_h
#define itkUnaryFunctorWithIndexImageFilter_h

#include "itkImageRegionConstIteratorWithIndex.h"
#include "itkImageScanlineIterator.h"
#include "itkAnisotropicDiffusionLBRMacro.h"
#include "itkImageToImageFilter.h"

namespace itk
{

template<typename TInputImage, typename TOutputImage, typename TFunctor>
class UnaryFunctorWithIndexImageFilter:
  public ImageToImageFilter<TInputImage, TOutputImage>
{
public:
  using Self = UnaryFunctorWithIndexImageFilter;
  using Superclass = ImageToImageFilter< TInputImage, TOutputImage >;
  using Pointer = SmartPointer< Self >;
  using ConstPointer = SmartPointer< const Self >;

  itkNewMacro(Self);

  itkTypeMacro(UnaryFunctorWithIndexImageFilter, Superclass);

  using InputImageType = TInputImage;
  using OutputImageType = TOutputImage;
  using FunctorType = TFunctor;

  GetSetFunctorMacro(Functor, FunctorType);

protected:
  UnaryFunctorWithIndexImageFilter()
    { this->DynamicMultiThreadingOn(); }

  FunctorType m_Functor;

  using InputRegionType = typename InputImageType::RegionType;
  using OutputRegionType = typename OutputImageType::RegionType;

  void DynamicThreadedGenerateData(const OutputRegionType & region) override
  {
    if( region.GetSize()[0] == 0 )
      {
      return;
      }

    ImageRegionConstIteratorWithIndex< InputImageType > inputIt( this->GetInput(), region);
    ImageScanlineIterator< OutputImageType > outputIt( this->GetOutput(), region);

    for( inputIt.GoToBegin(), outputIt.GoToBegin();
         !outputIt.IsAtEnd();
         )
      {
      while(!outputIt.IsAtEndOfLine())
        {
        outputIt.Set(m_Functor(inputIt.Value(), inputIt.GetIndex()));
        ++inputIt;
        ++outputIt;
        }
        outputIt.NextLine();
      }
  }
};

} // end namespace itk

#endif