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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 itkGreenPixelAccessor_h
#define itkGreenPixelAccessor_h
#include "itkRGBPixel.h"
namespace itk
{
/**
* \class GreenPixelAccessor
* \brief Give access to the Green component of a RGBPixel type
*
* This class is intended to be used as parameter of
* an ImageAdaptor to make an RGBPixel image appear as being
* of scalar type T, showing only the Green component.
*
* \sa ImageAdaptor
*
* \ingroup ImageAdaptors
*
* \ingroup ITKImageAdaptors
*/
template <typename T>
class GreenPixelAccessor
{
public:
/** Standard class type aliases. */
using Self = GreenPixelAccessor;
/** External type alias. It defines the external aspect
* that this class will exhibit */
using ExternalType = T;
/** Internal type alias. It defines the internal real
* representation of data */
using InternalType = RGBPixel<T>;
/** Write access to the Green component */
inline void
Set(InternalType & output, const ExternalType & input) const
{
output.SetGreen(input);
}
/** Read access to the Green component */
inline const ExternalType &
Get(const InternalType & input) const
{
return input.GetGreen();
}
bool
operator==(const Self &) const
{
return true;
}
ITK_UNEQUAL_OPERATOR_MEMBER_FUNCTION(Self);
};
} // end namespace itk
#endif
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