libcruft-util/extent.cpp

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/*
* This file is part of libgim.
*
* libgim is free software: you can redistribute it and/or modify it under the
* terms of the GNU General Public License as published by the Free Software
* Foundation, either version 3 of the License, or (at your option) any later
* version.
*
* libgim is distributed in the hope that it will be useful, but WITHOUT ANY
* WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
* FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
* details.
*
* You should have received a copy of the GNU General Public License
* along with libgim. If not, see <http://www.gnu.org/licenses/>.
*
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* Copyright 2010-2012 Danny Robson <danny@nerdcruft.net>
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*/
#include "extent.hpp"
#include "debug.hpp"
#include "maths.hpp"
#include <cmath>
using namespace util;
//-----------------------------------------------------------------------------
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template <typename T>
extent<T>::extent (const T _width, const T _height):
w (_width),
h (_height)
{ ; }
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template <typename T>
extent<T>::extent (const extent<T> &rhs):
w (rhs.w),
h (rhs.h)
{ ; }
template <typename T>
extent<T>&
extent<T>::operator= (const extent<T> &rhs) {
w = rhs.w;
h = rhs.h;
return *this;
}
//-----------------------------------------------------------------------------
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template <typename T>
T
extent<T>::diameter (void) const {
return static_cast<T> (sqrt (w * w + h * h));
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}
template <typename T>
T
extent<T>::area (void) const
{ return w * h; }
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//-----------------------------------------------------------------------------
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template <typename T>
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float
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extent<T>::aspect (void) const
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{
return static_cast<float> (w) / static_cast<float> (h);
}
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//-----------------------------------------------------------------------------
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template <typename T>
bool
extent<T>::empty (void) const
{ return almost_equal (area(), 0); }
//-----------------------------------------------------------------------------
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template <typename T>
bool
extent<T>::operator ==(const extent& rhs) const {
return almost_equal (w, rhs.w) &&
almost_equal (h, rhs.h);
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}
//-----------------------------------------------------------------------------
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template <typename T>
void
extent<T>::sanity (void) const
{ CHECK (w >= 0 && h >= 0); }
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namespace util {
template <>
void
extent<unsigned int>::sanity (void) const
{ return; }
template <>
void
extent<unsigned long>::sanity (void) const
{ return; }
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}
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//-----------------------------------------------------------------------------
template <typename T>
std::ostream&
operator<< (std::ostream &os, util::extent<T> e) {
os << "[" << e.w << ", " << e.h << "]";
return os;
}
template std::ostream& operator<< (std::ostream&, util::extent<uint16_t>);
template std::ostream& operator<< (std::ostream&, util::extent<uint32_t>);
template std::ostream& operator<< (std::ostream&, util::extent<uint64_t>);
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//-----------------------------------------------------------------------------
namespace util {
template struct extent<uint32_t>;
template struct extent<uint64_t>;
template struct extent<float>;
template struct extent<double>;
}