itkShiftScaleImageFilter.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 itkShiftScaleImageFilter_h
#define itkShiftScaleImageFilter_h

#include "itkImageToImageFilter.h"
#include "itkArray.h"

namespace itk
{
template< typename TInputImage, typename TOutputImage >
class ITK_TEMPLATE_EXPORT ShiftScaleImageFilter:
  public ImageToImageFilter< TInputImage, TOutputImage >
{
public:
  ITK_DISALLOW_COPY_AND_ASSIGN(ShiftScaleImageFilter);

  using Self = ShiftScaleImageFilter;
  using Superclass = ImageToImageFilter< TInputImage, TOutputImage >;
  using Pointer = SmartPointer< Self >;
  using ConstPointer = SmartPointer< const Self >;

  itkNewMacro(Self);

  using InputImageRegionType = typename TInputImage::RegionType;
  using OutputImageRegionType = typename TOutputImage::RegionType;

  using InputImagePointer = typename TInputImage::Pointer;
  using OutputImagePointer = typename TOutputImage::Pointer;

  using InputImagePixelType = typename TInputImage::PixelType;
  using OutputImagePixelType = typename TOutputImage::PixelType;

  using InputImageIndexType = typename TInputImage::IndexType;
  using InputImageSizeType = typename TInputImage::SizeType;
  using InputImageOffsetType = typename TInputImage::OffsetType;
  using OutputImageIndexType = typename TOutputImage::IndexType;
  using OutputImageSizeType = typename TOutputImage::SizeType;
  using OutputImageOffsetType = typename TOutputImage::OffsetType;

  using RealType = typename NumericTraits< OutputImagePixelType >::RealType;

  static constexpr unsigned int ImageDimension = TInputImage::ImageDimension;

  itkTypeMacro(ShiftScaleImageFilter, ImageToImageFilter);

  itkSetMacro(Shift, RealType);
  itkGetConstMacro(Shift, RealType);

  itkSetMacro(Scale, RealType);
  itkGetConstMacro(Scale, RealType);

  itkGetConstMacro(UnderflowCount, long);
  itkGetConstMacro(OverflowCount, long);

#ifdef ITK_USE_CONCEPT_CHECKING
  // Begin concept checking
  itkConceptMacro( OutputHasNumericTraitsCheck,
                   ( Concept::HasNumericTraits< OutputImagePixelType > ) );
  itkConceptMacro( InputPlusRealTypeCheck,
                   ( Concept::AdditiveOperators< InputImagePixelType, RealType, RealType > ) );
  itkConceptMacro( RealTypeMultiplyOperatorCheck,
                   ( Concept::MultiplyOperator< RealType > ) );
  // End concept checking
#endif

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

  void BeforeThreadedGenerateData() override;

  void AfterThreadedGenerateData() override;

  void  ThreadedGenerateData(const OutputImageRegionType &
                             outputRegionForThread,
                             ThreadIdType threadId) override;

  void DynamicThreadedGenerateData( const OutputImageRegionType & ) override
  {
    itkExceptionMacro("This class requires threadId so it must use classic multi-threading model");
  }

private:
  RealType m_Shift;
  RealType m_Scale;

  long m_UnderflowCount;
  long m_OverflowCount;

  Array< long > m_ThreadUnderflow;
  Array< long > m_ThreadOverflow;

  const TInputImage *m_InputImage;
  TOutputImage      *m_OutputImage;
};
} // end namespace itk

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

#endif