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/*=========================================================================
Program: Insight Segmentation & Registration Toolkit
Module: $RCSfile: itkScalarToRGBPixelFunctor.txx,v $
Language: C++
Date: $Date: 2006-02-06 22:01:58 $
Version: $Revision: 1.5 $
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 __itkScalarToRGBPixelFunctor_txx
#define __itkScalarToRGBPixelFunctor_txx
#include "itkScalarToRGBPixelFunctor.h"
namespace itk {
namespace Functor {
template <class TScalar>
ScalarToRGBPixelFunctor<TScalar>
::ScalarToRGBPixelFunctor()
{
m_Index[0] = m_Index[1] = m_Index[2] = 0;
const ::size_t l = sizeof(ScalarType);
for (unsigned int i = 0; i < l && i < 3; ++i)
{ m_Index[i] = i; }
#ifdef ITK_WORDS_BIGENDIAN
m_IsBigEndian = true;
#else
m_IsBigEndian = false;
#endif
}
template <class TScalar>
typename ScalarToRGBPixelFunctor<TScalar>::RGBPixelType
ScalarToRGBPixelFunctor<TScalar>
::operator()( const TScalar & v) const
{
unsigned int i;
int j;
TScalar buf = v;
unsigned char *bytes = (unsigned char *)(&buf);
RGBPixelType ans;
if (this->m_IsBigEndian == true)
{ // swap bytes
TScalar tmp;
for (j = sizeof(TScalar) - 1, i = 0; j >=0 ; j--, i++)
{ ((unsigned char *)(&tmp))[i] = bytes[j]; }
buf = tmp;
}
ans[0] = static_cast<RGBComponentType>( bytes[m_Index[0]] * 3 );
ans[1] = static_cast<RGBComponentType>( (bytes[m_Index[0]] + bytes[m_Index[1]]) * 5 );
ans[2] = static_cast<RGBComponentType>( (bytes[m_Index[0]] + bytes[m_Index[2]]) );
return ans;
}
} // end namespace Functor
} // end namespace itk
#endif
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