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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
{
namespace Accessor
{
/**
* \class AddPixelAccessor
* \brief Simulates the effect of adding a constant value to all pixels
*
* This class is intended to be used as parameter of
* an ImageAdaptor to make an image appear as having
* pixels with intensity values increased by a constant amount.
*
* \sa ImageAdaptor
* \ingroup ImageAdaptors
* \ingroup ITKImageAdaptors
*
* \sphinx
* \sphinxexample{Core/ImageAdaptors/AddConstantToPixelsWithoutDuplicatingImage,Add Constant To Every Pixel Without
* Duplicating Memory} \endsphinx
*/
template <typename TPixel>
class AddPixelAccessor
{
public:
/** Standard class type aliases. */
using Self = AddPixelAccessor;
/** External type alias. It defines the external aspect
* that this class will exhibit */
using ExternalType = TPixel;
/** Internal type alias. It defines the internal real
* representation of data */
using InternalType = TPixel;
/** Write access to the pixel */
inline void
Set(InternalType & output, const ExternalType & input) const
{
output = static_cast<InternalType>(input - m_Value);
}
/** Read access to the pixel */
inline ExternalType
Get(const InternalType & input) const
{
return static_cast<ExternalType>(input + m_Value);
}
/** Set the value to be added to pixels */
void
SetValue(const TPixel & newvalue)
{
m_Value = newvalue;
}
/** Get the value to be added to pixels */
TPixel
GetValue() const
{
return m_Value;
}
/** Assignment Operator */
Self &
operator=(const Self & apa)
{
this->m_Value = apa.m_Value;
return *this;
}
/** Constructors */
AddPixelAccessor()
: m_Value(TPixel{})
{}
AddPixelAccessor(const Self & apa)
: m_Value(apa.m_Value)
{}
private:
TPixel m_Value;
};
} // end namespace Accessor
} // end namespace itk
#endif
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