text: /*=========================================================================
   *
   *  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
   *
   *         http://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 itkVectorCastImageFilter_h
  #define itkVectorCastImageFilter_h
  
  #include "itkUnaryFunctorImageFilter.h"
  #include "itkNumericTraitsFixedArrayPixel.h"
  
  namespace itk
  {
  /**
   *\class VectorCastImageFilter
   *
   * \brief Casts input vector pixels to output vector pixel type.
   *
   * This filter is templated over the input image type and
   * output image type.
   *
   * The filter expect both images to have the same number of dimensions,
   * and that both the input and output have itk::Vector pixel types
   * of the same VectorDimension.
   *
   * \sa Vector
   *
   * \ingroup IntensityImageFilters  MultiThreaded
   * \ingroup ITKDeprecated
   */
  namespace Functor
  {
  template <typename TInput, typename TOutput>
  class VectorCast
  {
  public:
    VectorCast() = default;
    ~VectorCast() = default;
    bool
    operator!=(const VectorCast &) const
    {
      return false;
    }
  
    bool
    operator==(const VectorCast & other) const
    {
      return !(*this != other);
    }
  
    inline TOutput
    operator()(const TInput & A) const
    {
      using OutputValueType = typename TOutput::ValueType;
  
      TOutput value;
      for (unsigned int k = 0; k < TOutput::Dimension; k++)
      {
        value[k] = static_cast<OutputValueType>(A[k]);
      }
      return value;
    }
  };
  } // namespace Functor
  
  template <typename TInputImage, typename TOutputImage>
  class VectorCastImageFilter
    : public UnaryFunctorImageFilter<
        TInputImage,
        TOutputImage,
        Functor::VectorCast<typename TInputImage::PixelType, typename TOutputImage::PixelType>>
  {
  public:
    ITK_DISALLOW_COPY_AND_ASSIGN(VectorCastImageFilter);
  
    /** Standard class type aliases. */
    using Self = VectorCastImageFilter;
    using Superclass =
      UnaryFunctorImageFilter<TInputImage,
                              TOutputImage,
                              Functor::VectorCast<typename TInputImage::PixelType, typename TOutputImage::PixelType>>;
  
    using Pointer = SmartPointer<Self>;
    using ConstPointer = SmartPointer<const Self>;
  
    /** Method for creation through the object factory. */
    itkNewMacro(Self);
  
    /** Runtime information support. */
    itkTypeMacro(VectorCastImageFilter, UnaryFunctorImageFilter);
  
  #ifdef ITK_USE_CONCEPT_CHECKING
    // Begin concept checking
    itkConceptMacro(InputHasNumericTraitsCheck, (Concept::HasNumericTraits<typename TInputImage::PixelType::ValueType>));
    itkConceptMacro(OutputHasNumericTraitsCheck,
                    (Concept::HasNumericTraits<typename TOutputImage::PixelType::ValueType>));
    itkConceptMacro(
      InputConvertibleToOutputCheck,
      (Concept::Convertible<typename TInputImage::PixelType::ValueType, typename TOutputImage::PixelType::ValueType>));
    // End concept checking
  #endif
  
  protected:
    VectorCastImageFilter() = default;
    ~VectorCastImageFilter() override = default;
  };
  } // end namespace itk
  
  #endif
  