itkFFTPadImageFilter.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.
 *  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 itkFFTPadImageFilter_h
#define itkFFTPadImageFilter_h

#include "itkPadImageFilterBase.h"
#include "itkConceptChecking.h"
#include "itkZeroFluxNeumannBoundaryCondition.h"

namespace itk
{

template<typename TInputImage, typename TOutputImage=TInputImage>
class ITK_TEMPLATE_EXPORT FFTPadImageFilter :
    public PadImageFilterBase<TInputImage, TOutputImage>
{
public:
  ITK_DISALLOW_COPY_AND_ASSIGN(FFTPadImageFilter);

  using Self = FFTPadImageFilter;
  using Superclass = PadImageFilterBase<TInputImage, TOutputImage>;
  using Pointer = SmartPointer<Self>;
  using ConstPointer = SmartPointer<const Self>;

  using InputImageType = TInputImage;
  using OutputImageType = TOutputImage;
  using InputImagePixelType = typename InputImageType::PixelType;
  using OutputImagePixelType = typename OutputImageType::PixelType;
  using RegionType = typename InputImageType::RegionType;
  using IndexType = typename InputImageType::IndexType;
  using SizeType = typename InputImageType::SizeType;

  static constexpr unsigned int InputImageDimension = TInputImage::ImageDimension;
  static constexpr unsigned int OutputImageDimension = TOutputImage::ImageDimension;
  static constexpr unsigned int ImageDimension = TOutputImage::ImageDimension;

  itkNewMacro(Self);

  itkTypeMacro(FFTPadImageFilter, PadImageFilterBase);

  itkGetConstMacro(SizeGreatestPrimeFactor, SizeValueType);
  itkSetMacro(SizeGreatestPrimeFactor, SizeValueType);

  using BoundaryConditionType = ImageBoundaryCondition< TInputImage, TOutputImage >;
  using BoundaryConditionPointerType = BoundaryConditionType *;
  using DefaultBoundaryConditionType = ZeroFluxNeumannBoundaryCondition< TInputImage, TOutputImage >;

protected:
  FFTPadImageFilter();
  ~FFTPadImageFilter() override = default;
  void PrintSelf(std::ostream& os, Indent indent) const override;

  void GenerateOutputInformation() override;


private:
  SizeValueType m_SizeGreatestPrimeFactor;

  DefaultBoundaryConditionType m_DefaultBoundaryCondition;

}; // end of class

} // end namespace itk

#ifndef ITK_MANUAL_INSTANTIATION
#include "itkFFTPadImageFilter.hxx"
#endif

#endif