itkPixelTraits.h

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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.
 *
 *=========================================================================*/
/*=========================================================================
 *
 *  Portions of this file are subject to the VTK Toolkit Version 3 copyright.
 *
 *  Copyright (c) Ken Martin, Will Schroeder, Bill Lorensen
 *
 *  For complete copyright, license and disclaimer of warranty information
 *  please refer to the NOTICE file at the top of the ITK source tree.
 *
 *=========================================================================*/
#ifndef itkPixelTraits_h
#define itkPixelTraits_h
 
#include "itkMacro.h"
#include <type_traits>
 
namespace itk
{
namespace detail
{
template <typename TPixelType, typename = void>
struct PixelTraitsDimension
{};
template <typename TPixelType>
struct PixelTraitsDimension<TPixelType, std::void_t<decltype(TPixelType::Length)>>
{
  static constexpr unsigned int Dimension = TPixelType::Length;
};
 
template <typename TPixelType, typename = void>
struct PixelTraitsValueType
{};
template <typename TPixelType>
struct PixelTraitsValueType<TPixelType, std::void_t<typename TPixelType::ValueType>>
{
  using ValueType = typename TPixelType::ValueType;
};
} // namespace detail

template <typename TPixelType>
class PixelTraits
  : public detail::PixelTraitsDimension<TPixelType>
  , public detail::PixelTraitsValueType<TPixelType>
{};


template <>
class PixelTraits<bool>
{
public:
  static constexpr unsigned int Dimension = 1;
  using ValueType = bool;
};
 
template <>
class PixelTraits<char>
{
public:
  static constexpr unsigned int Dimension = 1;
  using ValueType = char;
};
 
template <>
class PixelTraits<signed char>
{
public:
  static constexpr unsigned int Dimension = 1;
  using ValueType = char;
};
 
template <>
class PixelTraits<unsigned char>
{
public:
  static constexpr unsigned int Dimension = 1;
  using ValueType = unsigned char;
};
 
template <>
class PixelTraits<short>
{
public:
  static constexpr unsigned int Dimension = 1;
  using ValueType = short;
};
 
template <>
class PixelTraits<unsigned short>
{
public:
  static constexpr unsigned int Dimension = 1;
  using ValueType = unsigned short;
};
 
template <>
class PixelTraits<int>
{
public:
  static constexpr unsigned int Dimension = 1;
  using ValueType = int;
};
 
template <>
class PixelTraits<unsigned int>
{
public:
  static constexpr unsigned int Dimension = 1;
  using ValueType = unsigned int;
};
 
template <>
class PixelTraits<long>
{
public:
  static constexpr unsigned int Dimension = 1;
  using ValueType = long;
};
 
template <>
class PixelTraits<unsigned long>
{
public:
  static constexpr unsigned int Dimension = 1;
  using ValueType = unsigned long;
};
 
 
template <>
class PixelTraits<long long>
{
public:
  static constexpr unsigned int Dimension = 1;
  using ValueType = long long;
};
 
template <>
class PixelTraits<unsigned long long>
{
public:
  static constexpr unsigned int Dimension = 1;
  using ValueType = unsigned long long;
};
 
template <>
class PixelTraits<float>
{
public:
  static constexpr unsigned int Dimension = 1;
  using ValueType = float;
};
 
template <>
class PixelTraits<double>
{
public:
  static constexpr unsigned int Dimension = 1;
  using ValueType = double;
};


template <typename TValue1, typename TValue2>
class JoinTraits
{
public:
  using ValueType = TValue1;
};


template <>
class JoinTraits<bool, bool>
{
public:
  using ValueType = bool;
};
 
template <>
class JoinTraits<bool, char>
{
public:
  using ValueType = char;
};
 
template <>
class JoinTraits<bool, unsigned char>
{
public:
  using ValueType = unsigned char;
};
 
template <>
class JoinTraits<bool, short>
{
public:
  using ValueType = short;
};
 
template <>
class JoinTraits<bool, unsigned short>
{
public:
  using ValueType = unsigned short;
};
 
template <>
class JoinTraits<bool, int>
{
public:
  using ValueType = int;
};
 
template <>
class JoinTraits<bool, unsigned int>
{
public:
  using ValueType = unsigned int;
};
 
template <>
class JoinTraits<bool, long>
{
public:
  using ValueType = long;
};
 
template <>
class JoinTraits<bool, unsigned long>
{
public:
  using ValueType = unsigned long;
};
 
 
template <>
class JoinTraits<bool, long long>
{
public:
  using ValueType = long long;
};
 
template <>
class JoinTraits<bool, unsigned long long>
{
public:
  using ValueType = unsigned long long;
};
 
template <>
class JoinTraits<bool, float>
{
public:
  using ValueType = float;
};
 
template <>
class JoinTraits<bool, double>
{
public:
  using ValueType = double;
};

template <>
class JoinTraits<char, bool>
{
public:
  using ValueType = char;
};
 
template <>
class JoinTraits<char, char>
{
public:
  using ValueType = char;
};
 
template <>
class JoinTraits<char, unsigned char>
{
public:
  using ValueType = short;
};
 
template <>
class JoinTraits<char, short>
{
public:
  using ValueType = short;
};
 
template <>
class JoinTraits<char, unsigned short>
{
public:
  using ValueType = int;
};
 
template <>
class JoinTraits<char, int>
{
public:
  using ValueType = int;
};
 
template <>
class JoinTraits<char, unsigned int>
{
public:
  // unsigned int & unsigned long may be the same size, so promote to float
  using ValueType = float;
};
 
template <>
class JoinTraits<char, long>
{
public:
  using ValueType = long;
};
 
template <>
class JoinTraits<char, unsigned long>
{
public:
  using ValueType = float;
};
 
template <>
class JoinTraits<char, long long>
{
public:
  using ValueType = long long;
};
 
template <>
class JoinTraits<char, unsigned long long>
{
public:
  using ValueType = double;
};
 
template <>
class JoinTraits<char, float>
{
public:
  using ValueType = float;
};
 
template <>
class JoinTraits<char, double>
{
public:
  using ValueType = double;
};

template <>
class JoinTraits<unsigned char, bool>
{
public:
  using ValueType = unsigned char;
};
 
template <>
class JoinTraits<unsigned char, char>
{
public:
  using ValueType = short;
};
 
template <>
class JoinTraits<unsigned char, unsigned char>
{
public:
  using ValueType = unsigned char;
};
 
template <>
class JoinTraits<unsigned char, short>
{
public:
  using ValueType = short;
};
 
template <>
class JoinTraits<unsigned char, unsigned short>
{
public:
  using ValueType = unsigned short;
};
 
template <>
class JoinTraits<unsigned char, int>
{
public:
  using ValueType = int;
};
 
template <>
class JoinTraits<unsigned char, unsigned int>
{
public:
  using ValueType = unsigned int;
};
 
template <>
class JoinTraits<unsigned char, long>
{
public:
  using ValueType = long;
};
 
template <>
class JoinTraits<unsigned char, unsigned long>
{
public:
  using ValueType = unsigned long;
};
 
template <>
class JoinTraits<unsigned char, long long>
{
public:
  using ValueType = long long;
};
 
template <>
class JoinTraits<unsigned char, unsigned long long>
{
public:
  using ValueType = unsigned long long;
};
 
template <>
class JoinTraits<unsigned char, float>
{
public:
  using ValueType = float;
};
 
template <>
class JoinTraits<unsigned char, double>
{
public:
  using ValueType = double;
};

template <>
class JoinTraits<short, bool>
{
public:
  using ValueType = short;
};
 
template <>
class JoinTraits<short, char>
{
public:
  using ValueType = short;
};
 
template <>
class JoinTraits<short, unsigned char>
{
public:
  using ValueType = short;
};
 
template <>
class JoinTraits<short, short>
{
public:
  using ValueType = short;
};
 
template <>
class JoinTraits<short, unsigned short>
{
public:
  using ValueType = int;
};
 
template <>
class JoinTraits<short, int>
{
public:
  using ValueType = int;
};
 
template <>
class JoinTraits<short, unsigned int>
{
public:
  // unsigned int & unsigned long may be the same size, so promote to float
  using ValueType = float;
};
 
template <>
class JoinTraits<short, long>
{
public:
  using ValueType = long;
};
 
template <>
class JoinTraits<short, unsigned long>
{
public:
  using ValueType = float;
};
 
template <>
class JoinTraits<short, long long>
{
public:
  using ValueType = long long;
};
 
template <>
class JoinTraits<short, unsigned long long>
{
public:
  using ValueType = double;
};
 
template <>
class JoinTraits<short, float>
{
public:
  using ValueType = float;
};
 
template <>
class JoinTraits<short, double>
{
public:
  using ValueType = double;
};

template <>
class JoinTraits<unsigned short, bool>
{
public:
  using ValueType = unsigned short;
};
 
template <>
class JoinTraits<unsigned short, char>
{
public:
  using ValueType = int;
};
 
template <>
class JoinTraits<unsigned short, unsigned char>
{
public:
  using ValueType = unsigned short;
};
 
template <>
class JoinTraits<unsigned short, short>
{
public:
  using ValueType = int;
};
 
template <>
class JoinTraits<unsigned short, unsigned short>
{
public:
  using ValueType = unsigned short;
};
 
template <>
class JoinTraits<unsigned short, int>
{
public:
  using ValueType = int;
};
 
template <>
class JoinTraits<unsigned short, unsigned int>
{
public:
  using ValueType = unsigned int;
};
 
template <>
class JoinTraits<unsigned short, long>
{
public:
  using ValueType = long;
};
 
template <>
class JoinTraits<unsigned short, unsigned long>
{
public:
  using ValueType = unsigned long;
};
 
template <>
class JoinTraits<unsigned short, long long>
{
public:
  using ValueType = long long;
};
 
template <>
class JoinTraits<unsigned short, unsigned long long>
{
public:
  using ValueType = unsigned long long;
};
 
template <>
class JoinTraits<unsigned short, float>
{
public:
  using ValueType = float;
};
 
template <>
class JoinTraits<unsigned short, double>
{
public:
  using ValueType = double;
};

template <>
class JoinTraits<int, bool>
{
public:
  using ValueType = int;
};
 
template <>
class JoinTraits<int, char>
{
public:
  using ValueType = int;
};
 
template <>
class JoinTraits<int, unsigned char>
{
public:
  using ValueType = int;
};
 
template <>
class JoinTraits<int, short>
{
public:
  using ValueType = int;
};
 
template <>
class JoinTraits<int, unsigned short>
{
public:
  using ValueType = int;
};
 
template <>
class JoinTraits<int, int>
{
public:
  using ValueType = int;
};
 
template <>
class JoinTraits<int, unsigned int>
{
public:
  // unsigned int & unsigned long may be the same size, so promote to float
  using ValueType = float;
};
 
template <>
class JoinTraits<int, long>
{
public:
  using ValueType = long;
};
 
template <>
class JoinTraits<int, unsigned long>
{
public:
  using ValueType = float;
};
 
template <>
class JoinTraits<int, long long>
{
public:
  using ValueType = long long;
};
 
template <>
class JoinTraits<int, unsigned long long>
{
public:
  using ValueType = double;
};
 
template <>
class JoinTraits<int, float>
{
public:
  using ValueType = float;
};
 
template <>
class JoinTraits<int, double>
{
public:
  using ValueType = double;
};

template <>
class JoinTraits<unsigned int, bool>
{
public:
  using ValueType = unsigned int;
};
 
template <>
class JoinTraits<unsigned int, char>
{
public:
  // unsigned int & unsigned long may be the same size, so promote to float
  using ValueType = float;
};
 
template <>
class JoinTraits<unsigned int, unsigned char>
{
public:
  using ValueType = unsigned int;
};
 
template <>
class JoinTraits<unsigned int, short>
{
public:
  // unsigned int & unsigned long may be the same size, so promote to float
  using ValueType = float;
};
 
template <>
class JoinTraits<unsigned int, unsigned short>
{
public:
  using ValueType = unsigned int;
};
 
template <>
class JoinTraits<unsigned int, int>
{
public:
  // unsigned int & unsigned long may be the same size, so promote to float
  using ValueType = float;
};
 
template <>
class JoinTraits<unsigned int, unsigned int>
{
public:
  using ValueType = unsigned int;
};
 
template <>
class JoinTraits<unsigned int, long>
{
public:
  using ValueType = float;
};
 
template <>
class JoinTraits<unsigned int, unsigned long>
{
public:
  using ValueType = unsigned long;
};
 
template <>
class JoinTraits<unsigned int, long long>
{
public:
  using ValueType = long long;
};
 
template <>
class JoinTraits<unsigned int, unsigned long long>
{
public:
  using ValueType = unsigned long long;
};
 
template <>
class JoinTraits<unsigned int, float>
{
public:
  using ValueType = float;
};
 
template <>
class JoinTraits<unsigned int, double>
{
public:
  using ValueType = double;
};

template <>
class JoinTraits<long, bool>
{
public:
  using ValueType = long;
};
 
template <>
class JoinTraits<long, char>
{
public:
  using ValueType = long;
};
 
template <>
class JoinTraits<long, unsigned char>
{
public:
  using ValueType = long;
};
 
template <>
class JoinTraits<long, short>
{
public:
  using ValueType = long;
};
 
template <>
class JoinTraits<long, unsigned short>
{
public:
  using ValueType = long;
};
 
template <>
class JoinTraits<long, int>
{
public:
  using ValueType = long;
};
 
template <>
class JoinTraits<long, unsigned int>
{
public:
  using ValueType = float;
};
 
template <>
class JoinTraits<long, long>
{
public:
  using ValueType = long;
};
 
template <>
class JoinTraits<long, unsigned long>
{
public:
  using ValueType = float;
};
 
 
template <>
class JoinTraits<long, long long>
{
public:
  using ValueType = long long;
};
 
template <>
class JoinTraits<long, unsigned long long>
{
public:
  using ValueType = double;
};
 
template <>
class JoinTraits<long, float>
{
public:
  using ValueType = float;
};
 
template <>
class JoinTraits<long, double>
{
public:
  using ValueType = double;
};

template <>
class JoinTraits<unsigned long, bool>
{
public:
  using ValueType = unsigned long;
};
 
template <>
class JoinTraits<unsigned long, char>
{
public:
  using ValueType = float;
};
 
template <>
class JoinTraits<unsigned long, unsigned char>
{
public:
  using ValueType = unsigned long;
};
 
template <>
class JoinTraits<unsigned long, short>
{
public:
  using ValueType = float;
};
 
template <>
class JoinTraits<unsigned long, unsigned short>
{
public:
  using ValueType = unsigned long;
};
 
template <>
class JoinTraits<unsigned long, int>
{
public:
  using ValueType = float;
};
 
template <>
class JoinTraits<unsigned long, unsigned int>
{
public:
  using ValueType = unsigned long;
};
 
template <>
class JoinTraits<unsigned long, long>
{
public:
  using ValueType = float;
};
 
template <>
class JoinTraits<unsigned long, unsigned long>
{
public:
  using ValueType = unsigned long;
};
 
template <>
class JoinTraits<unsigned long, long long>
{
public:
  using ValueType = double;
};
 
template <>
class JoinTraits<unsigned long, unsigned long long>
{
public:
  using ValueType = unsigned long long;
};
 
template <>
class JoinTraits<unsigned long, float>
{
public:
  using ValueType = float;
};
 
template <>
class JoinTraits<unsigned long, double>
{
public:
  using ValueType = double;
};
 

template <>
class JoinTraits<long long, bool>
{
public:
  using ValueType = long long;
};
 
template <>
class JoinTraits<long long, char>
{
public:
  using ValueType = long long;
};
 
template <>
class JoinTraits<long long, unsigned char>
{
public:
  using ValueType = long long;
};
 
template <>
class JoinTraits<long long, short>
{
public:
  using ValueType = long long;
};
 
template <>
class JoinTraits<long long, unsigned short>
{
public:
  using ValueType = long long;
};
 
template <>
class JoinTraits<long long, int>
{
public:
  using ValueType = long long;
};
 
template <>
class JoinTraits<long long, unsigned int>
{
public:
  using ValueType = long long;
};
 
template <>
class JoinTraits<long long, long>
{
public:
  using ValueType = long long;
};
 
template <>
class JoinTraits<long long, unsigned long>
{
public:
  using ValueType = double;
};
 
template <>
class JoinTraits<long long, long long>
{
public:
  using ValueType = long long;
};
 
template <>
class JoinTraits<long long, unsigned long long>
{
public:
  using ValueType = double;
};
 
template <>
class JoinTraits<long long, float>
{
public:
  using ValueType = double;
};
 
template <>
class JoinTraits<long long, double>
{
public:
  using ValueType = double;
};

template <>
class JoinTraits<unsigned long long, bool>
{
public:
  using ValueType = unsigned long long;
};
 
template <>
class JoinTraits<unsigned long long, char>
{
public:
  using ValueType = double;
};
 
template <>
class JoinTraits<unsigned long long, unsigned char>
{
public:
  using ValueType = unsigned long long;
};
 
template <>
class JoinTraits<unsigned long long, short>
{
public:
  using ValueType = double;
};
 
template <>
class JoinTraits<unsigned long long, unsigned short>
{
public:
  using ValueType = unsigned long long;
};
 
template <>
class JoinTraits<unsigned long long, int>
{
public:
  using ValueType = double;
};
 
template <>
class JoinTraits<unsigned long long, unsigned int>
{
public:
  using ValueType = unsigned long long;
};
 
template <>
class JoinTraits<unsigned long long, long>
{
public:
  using ValueType = double;
};
 
template <>
class JoinTraits<unsigned long long, unsigned long>
{
public:
  using ValueType = unsigned long long;
};
 
template <>
class JoinTraits<unsigned long long, long long>
{
public:
  using ValueType = double;
};
 
template <>
class JoinTraits<unsigned long long, unsigned long long>
{
public:
  using ValueType = unsigned long long;
};
 
template <>
class JoinTraits<unsigned long long, float>
{
public:
  using ValueType = double;
};
 
template <>
class JoinTraits<unsigned long long, double>
{
public:
  using ValueType = double;
};
 

template <>
class JoinTraits<float, bool>
{
public:
  using ValueType = float;
};
 
template <>
class JoinTraits<float, char>
{
public:
  using ValueType = float;
};
 
template <>
class JoinTraits<float, unsigned char>
{
public:
  using ValueType = float;
};
 
template <>
class JoinTraits<float, short>
{
public:
  using ValueType = float;
};
 
template <>
class JoinTraits<float, unsigned short>
{
public:
  using ValueType = float;
};
 
template <>
class JoinTraits<float, int>
{
public:
  using ValueType = float;
};
 
template <>
class JoinTraits<float, unsigned int>
{
public:
  using ValueType = float;
};
 
template <>
class JoinTraits<float, long>
{
public:
  using ValueType = float;
};
 
template <>
class JoinTraits<float, unsigned long>
{
public:
  using ValueType = float;
};
 
template <>
class JoinTraits<float, long long>
{
public:
  using ValueType = double;
};
 
template <>
class JoinTraits<float, unsigned long long>
{
public:
  using ValueType = double;
};
 
template <>
class JoinTraits<float, float>
{
public:
  using ValueType = float;
};
 
template <>
class JoinTraits<float, double>
{
public:
  using ValueType = double;
};

template <>
class JoinTraits<double, bool>
{
public:
  using ValueType = double;
};
 
template <>
class JoinTraits<double, char>
{
public:
  using ValueType = double;
};
 
template <>
class JoinTraits<double, unsigned char>
{
public:
  using ValueType = double;
};
 
template <>
class JoinTraits<double, short>
{
public:
  using ValueType = double;
};
 
template <>
class JoinTraits<double, unsigned short>
{
public:
  using ValueType = double;
};
 
template <>
class JoinTraits<double, int>
{
public:
  using ValueType = double;
};
 
template <>
class JoinTraits<double, unsigned int>
{
public:
  using ValueType = double;
};
 
template <>
class JoinTraits<double, long>
{
public:
  using ValueType = double;
};
 
template <>
class JoinTraits<double, unsigned long>
{
public:
  using ValueType = double;
};
 
template <>
class JoinTraits<double, long long>
{
public:
  using ValueType = double;
};
 
template <>
class JoinTraits<double, unsigned long long>
{
public:
  using ValueType = double;
};
 
template <>
class JoinTraits<double, float>
{
public:
  using ValueType = double;
};
 
template <>
class JoinTraits<double, double>
{
public:
  using ValueType = double;
};

 
} // end namespace itk
 
#endif // itkPixelTraits_h