text: /*=========================================================================
   *
   *  Copyright Insight Software Consortium
   *
   *  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 __itkMultiplyImageFilter_h
  #define __itkMultiplyImageFilter_h
  
  #include "itkBinaryFunctorImageFilter.h"
  
  namespace itk
  {
  /** \class MultiplyImageFilter
   * \brief Implements an operator for pixel-wise multiplication of two images.
   *
   * This class is parametrized over the types of the two
   * input images and the type of the output image.
   * Numeric conversions (castings) are done by the C++ defaults.
   *
   * \ingroup IntensityImageFilters  Multithreaded
   * \ingroup ITK-ImageIntensity
   *
   * \wiki
   * \wikiexample{ImageProcessing/MultiplyImageFilter,Multiply two images together}
   * \wikiexample{ImageProcessing/MultiplyByConstantImageFilter,Multiply every pixel in an image by a constant}
   * \endwiki
   */
  namespace Functor
  {
  template< class TInput1, class TInput2 = TInput1, class TOutput = TInput1 >
  class Mult
  {
  public:
    Mult() {}
    ~Mult() {}
    bool operator!=(const Mult &) const
    {
      return false;
    }
  
    bool operator==(const Mult & other) const
    {
      return !( *this != other );
    }
  
    inline TOutput operator()(const TInput1 & A, const TInput2 & B) const
    { return (TOutput)( A * B ); }
  };
  }
  
  template< class TInputImage1, class TInputImage2 = TInputImage1, class TOutputImage = TInputImage1 >
  class ITK_EXPORT MultiplyImageFilter:
    public
    BinaryFunctorImageFilter< TInputImage1, TInputImage2, TOutputImage,
                              Functor::Mult<
                                typename TInputImage1::PixelType,
                                typename TInputImage2::PixelType,
                                typename TOutputImage::PixelType >   >
  {
  public:
    /** Standard class typedefs. */
    typedef MultiplyImageFilter Self;
    typedef BinaryFunctorImageFilter< TInputImage1, TInputImage2, TOutputImage,
                                      Functor::Mult<
                                        typename TInputImage1::PixelType,
                                        typename TInputImage2::PixelType,
                                        typename TOutputImage::PixelType >
                                      >                                 Superclass;
    typedef SmartPointer< Self >       Pointer;
    typedef SmartPointer< const Self > ConstPointer;
  
    /** Method for creation through the object factory. */
    itkNewMacro(Self);
  
    /** Runtime information support. */
    itkTypeMacro(MultiplyImageFilter,
                 BinaryFunctorImageFilter);
  
  #ifdef ITK_USE_CONCEPT_CHECKING
    /** Begin concept checking */
    itkConceptMacro( Input1Input2OutputMultiplyOperatorCheck,
                     ( Concept::MultiplyOperator< typename TInputImage1::PixelType,
                                                  typename TInputImage2::PixelType,
                                                  typename TOutputImage::PixelType > ) );
    /** End concept checking */
  #endif
  protected:
    MultiplyImageFilter() {}
    virtual ~MultiplyImageFilter() {}
  private:
    MultiplyImageFilter(const Self &); //purposely not implemented
    void operator=(const Self &);      //purposely not implemented
  };
  } // end namespace itk
  
  #endif
  