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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 itkNthElementImageAdaptor_h
#define itkNthElementImageAdaptor_h
#include "itkImageAdaptor.h"
#include "itkNthElementPixelAccessor.h"
namespace itk
{
/**
* \class NthElementImageAdaptor
* \brief Presents an image as being composed of the N-th element of its pixels
*
* It assumes that the pixels are of container type and have in their API
* an operator[]( unsigned int ) defined.
*
* Additional casting is performed according to the input and output image
* types following C++ default casting rules.
*
* \ingroup ImageAdaptors
* \ingroup ITKImageAdaptors
*
* \sphinx
* \sphinxexample{Core/ImageAdaptors/ExtractChannelOfImageWithMultipleComponents,Extract Channel Of Image With Multiple
* Components} \sphinxexample{Core/ImageAdaptors/ProcessNthComponentOfVectorImage,Process Nth Component Of Vector Image}
* \endsphinx
*/
// Create a helper class to help the SunPro CC compiler
// parse the templates for the NthElementImageAdaptor.
// This is used to define the Super class. for NthElementImageAdaptor
template <typename TImage, typename TOutputPixelType>
class NthElementImageAdaptorHelper
{
public:
using PixelAccessor = NthElementPixelAccessor<TOutputPixelType, typename TImage::PixelType>;
using Super = ImageAdaptor<TImage, PixelAccessor>;
};
template <typename TImage, typename TOutputPixelType>
class ITK_TEMPLATE_EXPORT NthElementImageAdaptor : public NthElementImageAdaptorHelper<TImage, TOutputPixelType>::Super
{
public:
ITK_DISALLOW_COPY_AND_MOVE(NthElementImageAdaptor);
/** Standard class type aliases. */
using Self = NthElementImageAdaptor;
using Superclass = typename NthElementImageAdaptorHelper<TImage, TOutputPixelType>::Super;
using Pointer = SmartPointer<Self>;
using ConstPointer = SmartPointer<const Self>;
/** \see LightObject::GetNameOfClass() */
itkOverrideGetNameOfClassMacro(NthElementImageAdaptor);
/** Method for creation through the object factory. */
itkNewMacro(Self);
/** Select the element number to be accessed */
void
SelectNthElement(unsigned int nth)
{
this->GetPixelAccessor().SetElementNumber(nth);
this->Modified();
}
protected:
NthElementImageAdaptor() = default;
~NthElementImageAdaptor() override = default;
};
} // end namespace itk
#endif
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