/usr/include/ITK-4.9/itkScalarToRGBPixelFunctor.hxx is in libinsighttoolkit4-dev 4.9.0-4ubuntu1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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*
* Copyright Insight Software Consortium
*
* 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
*
* http://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 itkScalarToRGBPixelFunctor_hxx
#define itkScalarToRGBPixelFunctor_hxx
#include "itkScalarToRGBPixelFunctor.h"
#include "itkByteSwapper.h"
namespace itk
{
namespace Functor
{
template< typename TScalar >
ScalarToRGBPixelFunctor< TScalar >
::ScalarToRGBPixelFunctor()
{
m_ColorIndex[0] = 0;
m_ColorIndex[1] = 0;
m_ColorIndex[2] = 0;
const unsigned int scalarSize = static_cast< unsigned int >( sizeof( ScalarType ) );
for ( unsigned int i = 0; i < scalarSize && i < 3; ++i )
{
m_ColorIndex[i] = i;
}
#ifdef ITK_WORDS_BIGENDIAN
m_UseMSBForHashing = true;
#else
m_UseMSBForHashing = false;
#endif
}
template< typename TScalar >
typename ScalarToRGBPixelFunctor< TScalar >::RGBPixelType
ScalarToRGBPixelFunctor< TScalar >
::operator()(const TScalar & v) const
{
TScalar buf = v;
const unsigned char *bytes = reinterpret_cast<const unsigned char *>( &buf );
if ( this->m_UseMSBForHashing == true )
{ // swap bytes
// always swap regardless of system endianness
if(ByteSwapper< TScalar >::SystemIsBigEndian())
{
ByteSwapper< TScalar >::SwapFromSystemToLittleEndian(&buf);
}
else
{
ByteSwapper< TScalar >::SwapFromSystemToBigEndian(&buf);
}
}
RGBPixelType ans;
ans[0] = static_cast< RGBComponentType >( bytes[m_ColorIndex[0]] * 3 );
ans[1] = static_cast< RGBComponentType >( ( bytes[m_ColorIndex[0]] + bytes[m_ColorIndex[1]] ) * 5 );
ans[2] = static_cast< RGBComponentType >( ( bytes[m_ColorIndex[0]] + bytes[m_ColorIndex[2]] ) );
return ans;
}
} // end namespace Functor
} // end namespace itk
#endif
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