itkMaskNegatedImageFilter.h

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/*=========================================================================
 *
 *  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 __itkMaskNegatedImageFilter_h
#define __itkMaskNegatedImageFilter_h

#include "itkBinaryFunctorImageFilter.h"
#include "itkNumericTraits.h"

namespace itk
{
namespace Functor
{
template< class TInput, class TMask, class TOutput = TInput >
class MaskNegatedInput
{
public:
  typedef typename NumericTraits< TInput >::AccumulateType AccumulatorType;

  MaskNegatedInput()
    : m_OutsideValue(NumericTraits< TOutput >::Zero)
    , m_MaskingValue(NumericTraits< TMask >::ZeroValue())
  {
  }
  ~MaskNegatedInput() {}
  bool operator!=(const MaskNegatedInput &) const
  {
    return false;
  }

  bool operator==(const MaskNegatedInput & other) const
  {
    return !( *this != other );
  }

  inline TOutput operator()(const TInput & A, const TMask & B) const
  {
    if ( B != m_MaskingValue )
      {
      return m_OutsideValue;
      }
    else
      {
      return static_cast< TOutput >( A );
      }
  }

  void SetOutsideValue(const TOutput & outsideValue)
  {
    m_OutsideValue = outsideValue;
  }

  const TOutput & GetOutsideValue() const
  {
    return m_OutsideValue;
  }

  void SetMaskingValue(const TMask & maskingValue)
  {
    m_MaskingValue = maskingValue;
  }

  const TMask & GetMaskingValue() const
  {
    return m_MaskingValue;
  }
private:
  TOutput m_OutsideValue;
  TMask   m_MaskingValue;
};
}

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