SphinxExamples/src/Core/Common/CreateAnother/Code.cxx

/*=========================================================================
 *
 *  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.
 *  You may obtain a copy of the License at
 *
 *         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.
 *
 *=========================================================================*/

#include "itkAbsImageFilter.h"
#include "itkImage.h"

template< class TImage >
void CreateImage(typename TImage::Pointer image)
{
  using ImageType = TImage;
  typename ImageType::IndexType start;
  start.Fill(0);

  typename ImageType::SizeType size;
  size.Fill(2);

  typename ImageType::RegionType region(start,size);

  image->SetRegions(region);
  image->Allocate();
  image->FillBuffer( -2 );
}

int main(int, char*[])
{
  constexpr unsigned int Dimension = 2;
  using PixelType = double;

  using ImageType = itk::Image< PixelType, Dimension >;

  using FilterType = itk::AbsImageFilter<ImageType, ImageType>;
  FilterType::Pointer filter = FilterType::New();
  FilterType::Pointer filter2 =
    dynamic_cast<FilterType*>(filter->CreateAnother().GetPointer());

  ImageType::Pointer image = ImageType::New();
  CreateImage< ImageType >(image);

  filter2->SetInput(image);
  filter2->Update();

  itk::Index< Dimension > index;
  index.Fill(0);

  std::cout << filter2->GetOutput()->GetPixel(index) << std::endl;

  return EXIT_SUCCESS;
}