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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 itkDefaultPixelAccessor_h
#define itkDefaultPixelAccessor_h
#include "itkMacro.h"
namespace itk
{
/**
* \class DefaultPixelAccessor
* \brief Give access to partial aspects a type
*
* DefaultPixelAccessor is templated over an internal type and an
* external type representation. This class encapsulates a
* customized conversion between the internal and external
* type representations.
*
* PixelAccessor is the class responsible for pixel-to-pixel
* transformation during image data access. The DefaultPixelAccessor
* is an identity operation on the pixel value. It only exist in
* order to standardize the way in which pixels are accessed.
*
* PixelAccessor are used by ImageAdaptors in order to present
* an Image as being of a different type. The usual application
* of ImageAccessors is Image casting, by avoiding the overhead
* of an ImageFilter that performs the complete transformation
*
* \sa ImageAdaptor
* \sa PixelAccessor
* \sa Image
*
* \ingroup ImageAdaptors
*
* \ingroup ITKCommon
*/
template <typename TType>
class ITK_TEMPLATE_EXPORT DefaultPixelAccessor
{
public:
/** External type alias. It defines the external aspect
* that this class will exhibit. */
using ExternalType = TType;
/** Internal type alias. It defines the internal real
* representation of data. */
using InternalType = TType;
/** Set the pixel. */
inline void
Set(TType & output, const TType & input) const
{
output = input;
}
/** Get the pixel. */
inline TType &
Get(TType & input) const
{
return input;
}
/** Get a const reference to the pixel. */
inline const TType &
Get(const TType & input) const
{
return input;
}
};
} // end namespace itk
#endif
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