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/*=========================================================================
Program: Insight Segmentation & Registration Toolkit
Module: $RCSfile: itkDefaultVectorPixelAccessorFunctor.h,v $
Language: C++
Date: $Date: 2005-08-29 18:12:38 $
Version: $Revision: 1.2 $
Copyright (c) Insight Software Consortium. All rights reserved.
See ITKCopyright.txt or http://www.itk.org/HTML/Copyright.htm for details.
This software is distributed WITHOUT ANY WARRANTY; without even
the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
PURPOSE. See the above copyright notices for more information.
=========================================================================*/
#ifndef __itkDefaultVectorPixelAccessorFunctor_h
#define __itkDefaultVectorPixelAccessorFunctor_h
namespace itk
{
/** \class DefaultVectorPixelAccessorFunctor
* \brief This class provides a common API for pixel accessors for Image and
* VectorImage. (between the DefaultVectorPixelAccessor and DefaultPixelAccessor).
*
* The pixel accessor is set with the SetPixelAccessor method. This accessor is
* meant to be used only for VectorImage and not for Image. Prior to use, the
* start of the VectorImage buffer must also be set with the SetBegin method.
*
* \sa DefaultVectorPixelAccessor
* \sa DefaultPixelAccessor
* \sa DefaultPixelAccessorFunctor
*
* \thanks
* This work is part of the National Alliance for Medical Image Computing
* (NAMIC), funded by the National Institutes of Health through the NIH Roadmap
* for Medical Research, Grant U54 EB005149.
*
* \ingroup ImageAdaptors
*/
template <class TImageType >
class ITK_EXPORT DefaultVectorPixelAccessorFunctor
{
public:
typedef TImageType ImageType;
typedef typename ImageType::InternalPixelType InternalPixelType;
typedef typename ImageType::PixelType ExternalPixelType;
typedef typename ImageType::AccessorType PixelAccessorType;
typedef unsigned int VectorLengthType;
static void SetVectorLength( ImageType *image, VectorLengthType length )
{
image->SetVectorLength( length );
}
static VectorLengthType GetVectorLength( const ImageType * image )
{
return image->GetVectorLength();
}
/** Set the PixelAccessor. This is set at construction time by the image iterators.
* The type PixelAccessorType is obtained from the ImageType over which the iterators
* are templated.
* */
inline void SetPixelAccessor( PixelAccessorType& accessor )
{
m_PixelAccessor = accessor;
}
/** Set the pointer index to the start of the buffer. */
inline void SetBegin( const InternalPixelType * begin )
{ this->m_Begin = const_cast< InternalPixelType * >( begin ); }
/** Set output using the value in input */
inline void Set( InternalPixelType & output, const ExternalPixelType &input ) const
{
m_PixelAccessor.Set( output, input, (&output)-m_Begin );
}
/** Get the value from input */
inline ExternalPixelType Get( const InternalPixelType &input ) const
{
return m_PixelAccessor.Get( input, &input - m_Begin );
}
private:
PixelAccessorType m_PixelAccessor; // The pixel accessor
InternalPixelType *m_Begin; // Begin of the buffer
};
}
#endif
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