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.
   *
   *=========================================================================*/
  #include "itkLogicOpsFunctors.h"
  #include "itkBinaryFunctorImageFilter.h"
  #include "itkImageRegionIteratorWithIndex.h"
  #include "itkLogicTestSupport.h"
  
  int itkEqualTest(int, char* [] )
  {
  
    // Define the dimension of the images
    const unsigned int myDimension = 3;
  
    // Declare the types of the images
    typedef itk::Image<float, myDimension>  myImageType1;
    typedef itk::Image<float, myDimension>  myImageType2;
    typedef itk::Image<float, myDimension>  myImageType3;
    typedef myImageType1::PixelType         PixelType;
  
    // Declare the type of the index to access images
    typedef itk::Index<myDimension>         myIndexType;
  
    // Declare the type of the size
    typedef itk::Size<myDimension>          mySizeType;
  
    // Declare the type of the Region
    typedef itk::ImageRegion<myDimension>    myRegionType;
  
    // Declare the type for the ADD filter
    typedef itk::BinaryFunctorImageFilter<
      myImageType1,
      myImageType2,
      myImageType3,
      itk::Functor::Equal<myImageType1::PixelType,
                          myImageType2::PixelType,
                          myImageType3::PixelType> > myFilterType;
  
  // Declare the pointers to images
    typedef myImageType1::Pointer   myImageType1Pointer;
    typedef myImageType2::Pointer   myImageType2Pointer;
    typedef myImageType3::Pointer   myImageType3Pointer;
    typedef myFilterType::Pointer   myFilterTypePointer;
  
  // Create two images
    myImageType1Pointer inputImageA  = myImageType1::New();
    myImageType2Pointer inputImageB  = myImageType2::New();
  
  // Define their size, and start index
    mySizeType size;
    size[0] = 2;
    size[1] = 2;
    size[2] = 2;
  
    myIndexType start;
    start[0] = 0;
    start[1] = 0;
    start[2] = 0;
  
    myRegionType region;
    region.SetIndex( start );
    region.SetSize( size );
  
  // Initialize Image A
    inputImageA->SetLargestPossibleRegion( region );
    inputImageA->SetBufferedRegion( region );
    inputImageA->SetRequestedRegion( region );
    inputImageA->Allocate();
  
  // Initialize Image B
    inputImageB->SetLargestPossibleRegion( region );
    inputImageB->SetBufferedRegion( region );
    inputImageB->SetRequestedRegion( region );
    inputImageB->Allocate();
  
  
  // Declare Iterator types apropriated for each image
    typedef itk::ImageRegionIteratorWithIndex<myImageType1>  myIteratorType1;
    typedef itk::ImageRegionIteratorWithIndex<myImageType2>  myIteratorType2;
    typedef itk::ImageRegionIteratorWithIndex<myImageType3>  myIteratorType3;
  
  // Create one iterator for Image A (this is a light object)
    myIteratorType1 it1( inputImageA, inputImageA->GetBufferedRegion() );
  
  // Initialize the content of Image A
  
    it1.Set( 3.0 );
    ++it1;
    while( !it1.IsAtEnd() )
      {
      it1.Set( 2.0 );
      ++it1;
      }
  
  // Create one iterator for Image B (this is a light object)
    myIteratorType2 it2( inputImageB, inputImageB->GetBufferedRegion() );
  
  // Initialize the content of Image B
    while( !it2.IsAtEnd() )
      {
      it2.Set( 3.0 );
      ++it2;
      }
  
    {
    // Create a logic Filter
    myFilterTypePointer filter = myFilterType::New();
  
    // Connect the input images
    filter->SetInput1( inputImageA );
    filter->SetInput2( inputImageB );
  
    filter->SetFunctor(filter->GetFunctor());
  
    // Get the Smart Pointer to the Filter Output
    myImageType3Pointer outputImage = filter->GetOutput();
  
    // Execute the filter
    filter->Update();
    filter->SetFunctor(filter->GetFunctor());
  
    // check the results
    PixelType FG = filter->GetFunctor().GetForegroundValue();
    PixelType BG = filter->GetFunctor().GetBackgroundValue();
  
    int status1 = checkImOnImRes < myImageType1, myImageType2, myImageType3, std::equal_to<myImageType1::PixelType> >
                               (inputImageA, inputImageB, outputImage, FG, BG);
    if (status1 == EXIT_FAILURE)
      {
      return(EXIT_FAILURE);
      }
    else
      {
      std::cout << "Step 1 passed" << std::endl;
      }
    }
  
    {
    // Create a logic Filter
    myFilterTypePointer filter = myFilterType::New();
  
    // Connect the input images
    filter->SetInput1( inputImageA );
  
    filter->SetFunctor(filter->GetFunctor());
  
    // Get the Smart Pointer to the Filter Output
    myImageType3Pointer outputImage = filter->GetOutput();
  
    // Now try testing with constant : Im1 == 2
    filter->SetConstant(2.0);
    filter->Update();
    PixelType FG = filter->GetFunctor().GetForegroundValue();
    PixelType BG = filter->GetFunctor().GetBackgroundValue();
    PixelType C = filter->GetConstant2();
    int status2 = checkImOnConstRes < myImageType1, PixelType, myImageType3, std::equal_to<PixelType> >
                                  (inputImageA, C, outputImage, FG, BG);
    if (status2 == EXIT_FAILURE)
      {
      return(EXIT_FAILURE);
      }
    else
      {
      std::cout << "Step 2 passed " << std::endl;
      }
  
    }
  // Now try testing with constant : 3 == Im2
    {
    // Create a logic Filter
    myFilterTypePointer filter = myFilterType::New();
  
  
    // Connect the input images
  
    filter->SetFunctor(filter->GetFunctor());
  
    // Get the Smart Pointer to the Filter Output
    myImageType3Pointer outputImage = filter->GetOutput();
    filter->SetConstant1(3.0);
    filter->SetInput2(inputImageB);
    filter->Update();
    PixelType FG = filter->GetFunctor().GetForegroundValue();
    PixelType BG = filter->GetFunctor().GetBackgroundValue();
  
    int status3 = checkConstOnImRes < PixelType, myImageType2, myImageType3, std::equal_to<PixelType> >
                                  (filter->GetConstant1(),  inputImageB, outputImage, FG, BG);
    if (status3 == EXIT_FAILURE)
      {
      return(EXIT_FAILURE);
      }
    else
      {
      std::cout << "Step 3 passed" << std::endl;
      }
  
    }
  // All objects should be automatically destroyed at this point
    return EXIT_SUCCESS;
  
  }
  