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#ifndef RLEImageIterator_h
#define RLEImageIterator_h
#include "RLEImageConstIterator.h"
#include "itkImageIteratorWithIndex.h"
namespace itk
{
/**
* \class ImageIterator
* \brief A multi-dimensional iterator templated over image type.
*
* This is a base class of ImageConstIterator that adds write-access
* functionality. Please see ImageConstIterator for more information.
*
*/
template< typename TPixel, unsigned int VImageDimension, typename CounterType >
class ImageIterator<RLEImage<TPixel, VImageDimension, CounterType> >
:public ImageConstIterator<RLEImage<TPixel, VImageDimension, CounterType> >
{
public:
/** Standard class typedefs. */
typedef ImageIterator Self;
/** Dimension of the image the iterator walks. This constant is needed so
* functions that are templated over image iterator type (as opposed to
* being templated over pixel type and dimension) can have compile time
* access to the dimension of the image that the iterator walks. */
itkStaticConstMacro(ImageIteratorDimension, unsigned int, VImageDimension);
/** Define the superclass */
typedef ImageConstIterator< RLEImage<TPixel, VImageDimension, CounterType> > Superclass;
/** Inherit types from the superclass */
typedef typename Superclass::IndexType IndexType;
typedef typename Superclass::SizeType SizeType;
typedef typename Superclass::OffsetType OffsetType;
typedef typename Superclass::RegionType RegionType;
typedef typename Superclass::ImageType ImageType;
typedef typename Superclass::InternalPixelType InternalPixelType;
typedef typename Superclass::PixelType PixelType;
/** Default Constructor. Need to provide a default constructor since we
* provide a copy constructor. */
ImageIterator(){}
/** Default Destructor */
~ImageIterator() {}
/** Copy Constructor. The copy constructor is provided to make sure the
* handle to the image is properly reference counted. */
ImageIterator(const Self & it) :
ImageConstIterator<ImageType>(it) {}
/** Constructor establishes an iterator to walk a particular image and a
* particular region of that image. */
ImageIterator(ImageType *ptr, const RegionType & region):
ImageConstIterator<ImageType>(ptr, region){}
/** operator= is provided to make sure the handle to the image is properly
* reference counted. */
Self & operator=(const Self & it)
{
this->ImageConstIterator<ImageType>::operator=(it);
return *this;
}
/** Set the pixel value.
* Changing the RLE structure invalidates all other iterators (except this one). */
void Set(const PixelType & value) const
{
const_cast<ImageType *>(this->m_Image.GetPointer())->
SetPixel(*const_cast<typename ImageType::RLLine *>(this->rlLine),
this->segmentRemainder, this->realIndex, value);
}
///** Return a reference to the pixel
// * Setting this value would change value of the whole run-length segment.
// * If we wanted to safely enable it,
// * we would isolate this pixel into its own segment. */
//PixelType & Value(void)
//{
// return myBuffer[m_Index[2]][m_Index[1]][realIndex].second;
//}
/** Get the image that this iterator walks. */
ImageType * GetImage() const
{
// const_cast is needed here because m_Image is declared as a const pointer
// in the base class which is the ConstIterator.
return const_cast< ImageType * >( this->m_Image.GetPointer() );
}
protected:
/** This constructor is declared protected in order to enforce
const-correctness */
ImageIterator(const ImageConstIterator< ImageType > & it) :
ImageConstIterator<ImageType>(it) {}
Self & operator=(const ImageConstIterator< ImageType > & it)
{
this->ImageConstIterator< ImageType>::operator=(it);
return *this;
}
};
template< typename TPixel, unsigned int VImageDimension, typename CounterType >
class ImageIteratorWithIndex<RLEImage<TPixel, VImageDimension, CounterType> >
:public ImageConstIteratorWithIndex<RLEImage<TPixel, VImageDimension, CounterType> >
{
public:
typedef RLEImage<TPixel, VImageDimension, CounterType> ImageType;
typedef typename itk::ImageConstIterator<RLEImage<TPixel, VImageDimension, CounterType> >::RegionType RegionType;
/** Default Constructor. Need to provide a default constructor since we
* provide a copy constructor. */
ImageIteratorWithIndex() :ImageConstIteratorWithIndex< ImageType >(){ }
/** Copy Constructor. The copy constructor is provided to make sure the
* handle to the image is properly reference counted. */
ImageIteratorWithIndex(const ImageIteratorWithIndex & it)
{
this->ImageIterator< ImageType >::operator=(it);
}
/** Constructor establishes an iterator to walk a particular image and a
* particular region of that image. */
ImageIteratorWithIndex(const ImageType *ptr, const RegionType & region)
:ImageConstIteratorWithIndex< ImageType >(ptr, region) { }
/** Set the pixel value.
* Changing the RLE structure invalidates all other iterators (except this one). */
void Set(const TPixel & value) const
{
const_cast<ImageType *>(this->m_Image.GetPointer())->
SetPixel(*const_cast<typename ImageType::RLLine *>(this->rlLine),
this->segmentRemainder, this->realIndex, value);
}
/** Get the image that this iterator walks. */
ImageType * GetImage() const
{
// const_cast is needed here because m_Image is declared as a const pointer
// in the base class which is the ConstIterator.
return const_cast< ImageType * >(this->m_Image.GetPointer());
}
}; //no additional implementation required
} // end namespace itk
#endif //RLEImageIterator_h
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