text: /*=========================================================================
   *
   *  Copyright NumFOCUS
   *
   *  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.
   *
   *=========================================================================*/
  #ifndef itkImageToVTKImageFilter_hxx
  #define itkImageToVTKImageFilter_hxx
  
  #include "itkImageToVTKImageFilter.h"
  
  namespace itk
  {
  
  /**
   * Constructor
   */
  template <typename TInputImage>
  ImageToVTKImageFilter<TInputImage>::ImageToVTKImageFilter()
  {
    m_Importer = vtkImageImport::New();
    m_Exporter = ExporterFilterType::New();
  
    m_Importer->SetUpdateInformationCallback(m_Exporter->GetUpdateInformationCallback());
    m_Importer->SetPipelineModifiedCallback(m_Exporter->GetPipelineModifiedCallback());
    m_Importer->SetWholeExtentCallback(m_Exporter->GetWholeExtentCallback());
    m_Importer->SetSpacingCallback(m_Exporter->GetSpacingCallback());
    m_Importer->SetOriginCallback(m_Exporter->GetOriginCallback());
  #if VTK_MAJOR_VERSION >= 9 || (VTK_MAJOR_VERSION == 8 && VTK_MINOR_VERSION >= 90)
    m_Importer->SetDirectionCallback(m_Exporter->GetDirectionCallback());
  #endif
    m_Importer->SetScalarTypeCallback(m_Exporter->GetScalarTypeCallback());
    m_Importer->SetNumberOfComponentsCallback(m_Exporter->GetNumberOfComponentsCallback());
    m_Importer->SetPropagateUpdateExtentCallback(m_Exporter->GetPropagateUpdateExtentCallback());
    m_Importer->SetUpdateDataCallback(m_Exporter->GetUpdateDataCallback());
    m_Importer->SetDataExtentCallback(m_Exporter->GetDataExtentCallback());
    m_Importer->SetBufferPointerCallback(m_Exporter->GetBufferPointerCallback());
    m_Importer->SetCallbackUserData(m_Exporter->GetCallbackUserData());
  }
  
  /**
   * Destructor
   */
  template <typename TInputImage>
  ImageToVTKImageFilter<TInputImage>::~ImageToVTKImageFilter()
  {
    if (m_Importer)
    {
      m_Importer->Delete();
      m_Importer = nullptr;
    }
  }
  
  /**
   * Set an itk::Image as input
   */
  template <typename TInputImage>
  void
  ImageToVTKImageFilter<TInputImage>::SetInput(const InputImageType * inputImage)
  {
    m_Exporter->SetInput(inputImage);
  }
  
  template <typename TInputImage>
  typename ImageToVTKImageFilter<TInputImage>::InputImageType *
  ImageToVTKImageFilter<TInputImage>::GetInput()
  {
    return m_Exporter->GetInput();
  }
  
  /**
   * Get a vtkImage as output
   */
  template <typename TInputImage>
  vtkImageData *
  ImageToVTKImageFilter<TInputImage>::GetOutput() const
  {
    return m_Importer->GetOutput();
  }
  
  /**
   * Get the importer filter
   */
  template <typename TInputImage>
  vtkImageImport *
  ImageToVTKImageFilter<TInputImage>::GetImporter() const
  {
    return m_Importer;
  }
  
  /**
   * Get the exporter filter
   */
  template <typename TInputImage>
  typename ImageToVTKImageFilter<TInputImage>::ExporterFilterType *
  ImageToVTKImageFilter<TInputImage>::GetExporter() const
  {
    return m_Exporter.GetPointer();
  }
  
  /**
   * Delegate the Update to the importer
   */
  template <typename TInputImage>
  void
  ImageToVTKImageFilter<TInputImage>::Update()
  {
    m_Importer->Update();
  }
  
  /**
   * Delegate the UpdateLargestPossibleRegion to the importer
   */
  template <typename TInputImage>
  void
  ImageToVTKImageFilter<TInputImage>::UpdateLargestPossibleRegion()
  {
    m_Importer->UpdateWholeExtent();
  }
  
  } // end namespace itk
  
  #endif
  