itkAddPixelAccessor.h

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/*=========================================================================
 *
 *  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
 *
 *         https://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 itkAddPixelAccessor_h
#define itkAddPixelAccessor_h
 
#include "itkNumericTraits.h"
 
namespace itk::Accessor
{
 
template <typename TPixel>
class AddPixelAccessor
{
public:
  using Self = AddPixelAccessor;

  using ExternalType = TPixel;

  using InternalType = TPixel;

  inline void
  Set(InternalType & output, const ExternalType & input) const
  {
    output = static_cast<InternalType>(input - m_Value);
  }

  [[nodiscard]] inline ExternalType
  Get(const InternalType & input) const
  {
    return static_cast<ExternalType>(input + m_Value);
  }

  void
  SetValue(const TPixel & newvalue)
  {
    m_Value = newvalue;
  }

  [[nodiscard]] TPixel
  GetValue() const
  {
    return m_Value;
  }

  Self &
  operator=(const Self & apa) = default;

  AddPixelAccessor()
    : m_Value(TPixel{})
  {}
  AddPixelAccessor(const Self & apa)
    : m_Value(apa.m_Value)
  {}

private:
  TPixel m_Value;
};
} // namespace itk::Accessor
 
#endif