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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 itkImageIterator_h
#define itkImageIterator_h
#include "itkImageConstIterator.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.
*
* \par MORE INFORMATION
* For a complete description of the ITK Image Iterators and their API, please
* see the Iterators chapter in the ITK Software Guide. The ITK Software Guide
* is available in print and as a free .pdf download from https://www.itk.org.
*
* \ingroup ImageIterators
*
* \sa ImageConstIterator \sa ConditionalConstIterator
* \sa ConstNeighborhoodIterator \sa ConstShapedNeighborhoodIterator
* \sa ConstSliceIterator \sa CorrespondenceDataStructureIterator
* \sa FloodFilledFunctionConditionalConstIterator
* \sa FloodFilledImageFunctionConditionalConstIterator
* \sa FloodFilledImageFunctionConditionalIterator
* \sa FloodFilledSpatialFunctionConditionalConstIterator
* \sa FloodFilledSpatialFunctionConditionalIterator
* \sa ImageConstIterator \sa ImageConstIteratorWithIndex
* \sa ImageIterator \sa ImageIteratorWithIndex
* \sa ImageLinearConstIteratorWithIndex \sa ImageLinearIteratorWithIndex
* \sa ImageRandomConstIteratorWithIndex \sa ImageRandomIteratorWithIndex
* \sa ImageRegionConstIterator \sa ImageRegionConstIteratorWithIndex
* \sa ImageRegionExclusionConstIteratorWithIndex
* \sa ImageRegionExclusionIteratorWithIndex
* \sa ImageRegionIterator \sa ImageRegionIteratorWithIndex
* \sa ImageRegionReverseConstIterator \sa ImageRegionReverseIterator
* \sa ImageReverseConstIterator \sa ImageReverseIterator
* \sa ImageSliceConstIteratorWithIndex \sa ImageSliceIteratorWithIndex
* \sa NeighborhoodIterator \sa PathConstIterator \sa PathIterator
* \sa ShapedNeighborhoodIterator \sa SliceIterator
*
*
* \ingroup ITKCommon
*/
template <typename TImage>
class ITK_TEMPLATE_EXPORT ImageIterator : public ImageConstIterator<TImage>
{
public:
/** Standard class type aliases. */
using Self = ImageIterator;
/** 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. */
static constexpr unsigned int ImageIteratorDimension = TImage::ImageDimension;
/** Define the superclass */
using Superclass = ImageConstIterator<TImage>;
/** Inherit types from the superclass */
using typename Superclass::IndexType;
using typename Superclass::SizeType;
using typename Superclass::OffsetType;
using typename Superclass::RegionType;
using typename Superclass::ImageType;
using typename Superclass::PixelContainer;
using typename Superclass::PixelContainerPointer;
using typename Superclass::InternalPixelType;
using typename Superclass::PixelType;
using typename Superclass::AccessorType;
/** Default Constructor. Need to provide a default constructor since we
* provide a copy constructor. */
ImageIterator() = default;
/** Default Destructor */
~ImageIterator() override = default;
/** Copy Constructor. The copy constructor is provided to make sure the
* handle to the image is properly reference counted. */
ImageIterator(const Self & it);
/** Constructor establishes an iterator to walk a particular image and a
* particular region of that image. */
ImageIterator(TImage * ptr, const RegionType & region);
/** operator= is provided to make sure the handle to the image is properly
* reference counted. */
Self &
operator=(const Self & it);
/** Set the pixel value */
void
Set(const PixelType & value) const
{
// const_cast is needed here because m_Buffer is declared as a const
// pointer in the superclass which is the ConstIterator.
this->m_PixelAccessorFunctor.Set(*(const_cast<InternalPixelType *>(this->m_Buffer) + this->m_Offset), value);
}
/** Return a reference to the pixel
* This method will provide the fastest access to pixel
* data, but it will NOT support ImageAdaptors. */
PixelType &
Value()
{
// const_cast is needed here because m_Buffer is declared as a const
// pointer in the superclass which is the ConstIterator.
return *(const_cast<InternalPixelType *>(this->m_Buffer) + this->m_Offset);
}
/** 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<TImage> & it);
Self &
operator=(const ImageConstIterator<TImage> & it);
};
} // end namespace itk
#ifndef ITK_MANUAL_INSTANTIATION
# include "itkImageIterator.hxx"
#endif
#endif
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