Size2.hpp

/******************************************************************************
 
  nomlib - C++11 cross-platform game engine
 
Copyright (c) 2013, 2014 Jeffrey Carpenter <i8degrees@gmail.com>
All rights reserved.
 
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modification, are permitted provided that the following conditions are met:
 
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******************************************************************************/
#ifndef NOMLIB_MATH_SIZE2_HEADERS
#define NOMLIB_MATH_SIZE2_HEADERS
 
#include <iostream>
#include <algorithm>
 
#include "nomlib/config.hpp"
 
// FIXME: The following declaration is necessary in order to avoid a very
// nasty compiling conflict that can happen under Windows anytime the
// windef.h header file is included (commonly from windows.h), due to min and
// max macros being declared there. This is why macros are evil.
//
// http://support.microsoft.com/kb/143208
// http://stackoverflow.com/questions/5004858/stdmin-gives-error
#if defined( NOM_PLATFORM_WINDOWS )
  #undef min
  #undef max
#endif
 
namespace nom {

const std::string SIZE2_DELIMITER = ", ";

template <typename T>
struct Size2
{
  Size2 ( void ) :
    w ( -1 ),
    h ( -1 )
  {
    //NOM_LOG_TRACE(NOM);
  }

  ~Size2 ( void )
  {
    //NOM_LOG_TRACE(NOM);
  }

  Size2 ( T w, T h ) :
    w ( w ),
    h ( h )
  {
    //NOM_LOG_TRACE(NOM);
  }

  template <typename U>
  explicit Size2 ( const Size2<U>& copy ) :
    w { static_cast<T> ( copy.w ) },
    h { static_cast<T> ( copy.h ) }
  {
    this->w = static_cast<T> ( copy.w );
    this->h = static_cast<T> ( copy.h );
  }

  template <typename U>
  Size2 max( const Size2<U>& rhs )
  {
    return Size2<T>( std::max( this->w, rhs.w ), std::max( this->h, rhs.h ) );
  }

  template <typename U>
  Size2 min( const Size2<U>& rhs )
  {
    return Size2<T>( std::min( this->w, rhs.w ), std::min( this->h, rhs.h ) );
  }

  void swap( void )
  {
    std::swap( this->w, this->h );
  }

  static const Size2 null;

  static const Size2 zero;

  T w;

  T h;
};

template <typename T>
inline std::ostream& operator <<( std::ostream& os, const Size2<T>& pos )
{
  os
  << pos.w
  << SIZE2_DELIMITER
  << pos.h;
 
  return os;
}
 
template <typename T>
inline bool operator ==( const Size2<T>& lhs, const Size2<T>& rhs )
{
  return  ( lhs.w == rhs.w )  &&  ( lhs.h == rhs.h );
}
 
template <typename T>
inline bool operator !=( const Size2<T>& lhs, const Size2<T>& rhs )
{
  return ! ( lhs == rhs );
}

template <typename T>
inline Size2<T> operator +( const Size2<T>& lhs, const Size2<T>& rhs )
{
  return Size2<T> (
                    lhs.w + rhs.w,
                    lhs.h + rhs.h
                  );
}

template <typename T>
inline Size2<T> operator +(int lhs, const Size2<T>& rhs)
{
  return Size2<T>(lhs + rhs.w, lhs + rhs.h);
}

template <typename T>
inline Size2<T> operator +(const Size2<T>& lhs, int rhs)
{
  return Size2<T>(lhs.w + rhs, lhs.h + rhs);
}

template <typename T>
inline Size2<T> operator ++( const Size2<T>& rhs )
{
  return Size2<T> (
                    ++rhs.w,
                    ++rhs.h
                  );
}

template <typename T>
inline Size2<T> operator -( const Size2<T>& rhs )
{
  return Size2<T> (
                    -rhs.w
                    -rhs.h
                  );
}

template <typename T>
inline Size2<T> operator -( const Size2<T>& lhs, const Size2<T>& rhs )
{
  return Size2<T> (
                    lhs.w - rhs.w,
                    lhs.h - rhs.h
                  );
}

template <typename T>
inline Size2<T> operator -(int lhs, const Size2<T>& rhs)
{
  return Size2<T>(lhs - rhs.w, lhs - rhs.h);
}

template <typename T>
inline Size2<T> operator -(const Size2<T>& lhs, int rhs)
{
  return Size2<T>(lhs.w - rhs, lhs.h - rhs);
}

template <typename T>
inline Size2<T> operator --( const Size2<T>& rhs )
{
  return Size2<T> (
                    --rhs.w,
                    --rhs.h
                  );
}

template <typename T>
inline Size2<T> operator *( const Size2<T>& lhs, const Size2<T>& rhs )
{
  return Size2<T> ( lhs.w * rhs.w,
                    lhs.h * rhs.h
                  );
}

template <typename T>
inline Size2<T> operator *(int lhs, const Size2<T>& rhs)
{
  return Size2<T>(lhs * rhs.w, lhs * rhs.h);
}

template <typename T>
inline Size2<T> operator *(const Size2<T>& lhs, int rhs)
{
  return Size2<T>(lhs.w * rhs, lhs.h * rhs);
}

template <typename T>
inline Size2<T>& operator +=( Size2<T>& lhs, const Size2<T>& rhs )
{
  lhs.w += rhs.w;
  lhs.h += rhs.h;
 
  return lhs;
}

template <typename T>
inline Size2<T>& operator +=(int lhs, const Size2<T>& rhs)
{
  lhs += rhs.w;
  lhs += rhs.h;
 
  return lhs;
}

template <typename T>
inline Size2<T>& operator +=(Size2<T>& lhs, int rhs)
{
  lhs.w += rhs;
  lhs.h += rhs;
 
  return lhs;
}

template <typename T>
inline Size2<T>& operator -=( Size2<T>& lhs, const Size2<T>& rhs )
{
  lhs.w -= rhs.w;
  lhs.h -= rhs.h;
 
  return lhs;
}

template <typename T>
inline Size2<T>& operator -=(int lhs, const Size2<T>& rhs)
{
  lhs -= rhs.w;
  lhs -= rhs.h;
 
  return lhs;
}

template <typename T>
inline Size2<T>& operator -=(Size2<T>& lhs, int rhs)
{
  lhs.w -= rhs;
  lhs.h -= rhs;
 
  return lhs;
}

template <typename T>
inline Size2<T>& operator *=( Size2<T>& lhs, const Size2<T>& rhs )
{
  lhs.w *= rhs.w;
  lhs.h *= rhs.h;
 
  return lhs;
}

template <typename T>
inline Size2<T>& operator /=( Size2<T>& lhs, const Size2<T>& rhs )
{
  lhs.w /= rhs.w;
  lhs.h /= rhs.h;
 
  return lhs;
}

template <typename T>
inline Size2<T>& operator /=(int lhs, const Size2<T>& rhs)
{
  lhs /= rhs.w;
  lhs /= rhs.h;
 
  return lhs;
}

template <typename T>
inline Size2<T>& operator /=(Size2<T>& lhs, int rhs)
{
  lhs.w /= rhs;
  lhs.h /= rhs;
 
  return lhs;
}

template <typename T>
inline Size2<T> operator /( const Size2<T>& lhs, const Size2<T>& rhs )
{
  Size2<T> ret;
  ret.w = lhs.w / rhs.w;
  ret.h = lhs.h / rhs.h;
 
  return ret;
}

template <typename T>
inline Size2<T> operator /(int lhs, const Size2<T>& rhs)
{
  Size2<T> ret;
  ret.w = lhs / rhs.w;
  ret.h = lhs / rhs.h;
 
  return ret;
}

template <typename T>
inline Size2<T> operator /(const Size2<T>& lhs, int rhs)
{
  Size2<T> ret;
  ret.w = lhs.w / rhs;
  ret.h = lhs.h / rhs;
 
  return ret;
}

template <typename T>
inline bool operator <( const Size2<T> lhs, const Size2<T>& rhs )
{
  return  ( lhs.w < rhs.w ) && ( lhs.h < rhs.h );
}

template <typename T>
inline bool operator >( const Size2<T>& lhs, const Size2<T>& rhs )
{
  return  ( rhs.w < lhs.w ) && ( rhs.h < lhs.h );
}

template <typename T>
inline bool operator <=( const Size2<T>& lhs, const Size2<T>& rhs )
{
  return  ( lhs.w <= rhs.w ) && ( lhs.h <= rhs.h );
}

template <typename T>
inline bool operator >=( const Size2<T>& lhs, const Size2<T>& rhs )
{
  return  ( rhs.w <= lhs.w ) && ( rhs.h <= lhs.h );
}

typedef Size2<int> Size2i;

typedef Size2<float> Size2f;

typedef Size2<double> Size2d;
 
} // namespace nom
 
#endif // include guard defined