itkAttributeUniqueLabelMapFilter.h

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/*=========================================================================
 *
 *  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
 *
 *         https://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 itkAttributeUniqueLabelMapFilter_h
#define itkAttributeUniqueLabelMapFilter_h
 
#include "itkInPlaceLabelMapFilter.h"
#include "itkAttributeLabelObject.h"
 
namespace itk
{
template <typename TImage,
          typename TAttributeAccessor = Functor::AttributeLabelObjectAccessor<typename TImage::LabelObjectType>>
class ITK_TEMPLATE_EXPORT AttributeUniqueLabelMapFilter : public InPlaceLabelMapFilter<TImage>
{
public:
  ITK_DISALLOW_COPY_AND_MOVE(AttributeUniqueLabelMapFilter);

  using Self = AttributeUniqueLabelMapFilter;
  using Superclass = InPlaceLabelMapFilter<TImage>;
  using Pointer = SmartPointer<Self>;
  using ConstPointer = SmartPointer<const Self>;

  using ImageType = TImage;
  using ImagePointer = typename ImageType::Pointer;
  using ImageConstPointer = typename ImageType::ConstPointer;
  using PixelType = typename ImageType::PixelType;
  using IndexType = typename ImageType::IndexType;
  using LabelObjectType = typename ImageType::LabelObjectType;
 
  using AttributeAccessorType = TAttributeAccessor;
  using AttributeValueType = typename AttributeAccessorType::AttributeValueType;
 
  using LineType = typename LabelObjectType::LineType;

  static constexpr unsigned int ImageDimension = TImage::ImageDimension;

  itkNewMacro(Self);

  itkOverrideGetNameOfClassMacro(AttributeUniqueLabelMapFilter);
 
  /*  itkConceptMacro(InputEqualityComparableCheck,
      (Concept::EqualityComparable<InputImagePixelType>));
    itkConceptMacro(IntConvertibleToInputCheck,
      (Concept::Convertible<int, InputImagePixelType>));
    itkConceptMacro(InputOStreamWritableCheck,
      (Concept::OStreamWritable<InputImagePixelType>));*/

  itkSetMacro(ReverseOrdering, bool);
  itkGetConstReferenceMacro(ReverseOrdering, bool);
  itkBooleanMacro(ReverseOrdering);
protected:
  AttributeUniqueLabelMapFilter() = default;
  ~AttributeUniqueLabelMapFilter() override = default;
 
  void
  GenerateData() override;
 
  void
  PrintSelf(std::ostream & os, Indent indent) const override;
 
  bool m_ReverseOrdering{};
 
private:
  struct LineOfLabelObject
  {
    using LineType = typename LabelObjectType::LineType;
 
    LineOfLabelObject(const LineType l, LabelObjectType * lo)
      : line(l)
      , labelObject(lo)
    {}
    LineType          line;
    LabelObjectType * labelObject;
  };
 
  class LineOfLabelObjectComparator
  {
  public:
    bool
    operator()(const LineOfLabelObject & lla, const LineOfLabelObject & llb)
    {
      for (int i = ImageDimension - 1; i >= 0; i--)
      {
        if (lla.line.GetIndex()[i] > llb.line.GetIndex()[i])
        {
          return true;
        }
        if (lla.line.GetIndex()[i] < llb.line.GetIndex()[i])
        {
          return false;
        }
      }
      return false;
    }
  };
 
}; // end of class
 
} // end namespace itk
 
#ifndef ITK_MANUAL_INSTANTIATION
#  include "itkAttributeUniqueLabelMapFilter.hxx"
#endif
 
#endif