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 itkXorImageFilter_h
  #define itkXorImageFilter_h
  
  #include "itkBinaryFunctorImageFilter.h"
  #include "itkBitwiseOpsFunctors.h"
  #include "itkNumericTraits.h"
  
  namespace itk
  {
  /** \class XorImageFilter
   * \brief Computes the XOR bitwise operator pixel-wise between two images.
   *
   * This class is templated over the types of the two
   * input images and the type of the output image.
   * Numeric conversions (castings) are done by the C++ defaults.
   *
   * Since the bitwise XOR operation is only defined in C++ for integer
   * types, the images passed to this filter must comply with the requirement
   * of using integer pixel type.
   *
   * The total operation over one pixel will be
   *
   * \code
   *  output_pixel = static_cast<OutputPixelType>( input1_pixel ^ input2_pixel )
   * \endcode
   *
   * Where "^" is the boolean XOR operator in C++.
   *
   * \ingroup IntensityImageFilters
   * \ingroup MultiThreaded
   * \ingroup ITKImageIntensity
   *
   * \wiki
   * \wikiexample{ImageProcessing/XorImageFilter,Binary XOR (exclusive OR) two images}
   * \endwiki
   */
  template< typename TInputImage1, typename TInputImage2 = TInputImage1, typename TOutputImage = TInputImage1 >
  class XorImageFilter:
    public
    BinaryFunctorImageFilter< TInputImage1, TInputImage2, TOutputImage,
                              Functor::XOR<
                                typename TInputImage1::PixelType,
                                typename TInputImage2::PixelType,
                                typename TOutputImage::PixelType >   >
  
  {
  public:
    /** Standard class typedefs. */
    typedef XorImageFilter Self;
    typedef BinaryFunctorImageFilter< TInputImage1, TInputImage2, TOutputImage,
                                      Functor::XOR<
                                        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(XorImageFilter,
                 BinaryFunctorImageFilter);
  
  #ifdef ITK_USE_CONCEPT_CHECKING
    // Begin concept checking
    itkConceptMacro( Input1Input2OutputBitwiseOperatorsCheck,
                     ( Concept::BitwiseOperators< typename TInputImage1::PixelType,
                                                  typename TInputImage2::PixelType,
                                                  typename TOutputImage::PixelType > ) );
    // End concept checking
  #endif
  
  protected:
    XorImageFilter() {}
    virtual ~XorImageFilter() {}
  
  private:
    ITK_DISALLOW_COPY_AND_ASSIGN(XorImageFilter);
  };
  } // end namespace itk
  
  #endif
  