133 lines
3.4 KiB
C++
133 lines
3.4 KiB
C++
/*
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* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/.
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*
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* Copyright 2010-2016 Danny Robson <danny@nerdcruft.net>
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*/
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#include "extent.hpp"
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#include "maths.hpp"
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#include <algorithm>
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#include <numeric>
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using cruft::extent;
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///////////////////////////////////////////////////////////////////////////////
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template <size_t S, typename T>
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extent<S,T>::extent (vector<S,T> _v)
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{
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std::transform (std::begin (_v),
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std::end (_v),
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this->begin (),
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[] (auto i) {
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// using std::abs gives unsigned abs warnings under clang. this tricks
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// it sufficiently to quiet the warnings.
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return i < 0 ? -i : i;
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});
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}
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///////////////////////////////////////////////////////////////////////////////
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template <size_t S, typename T>
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extent<S,T>
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extent<S,T>::expanded (cruft::vector<S,T> mag) const
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{
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return *this + mag;
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}
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//-----------------------------------------------------------------------------
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template <size_t S, typename T>
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extent<S,T>
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extent<S,T>::expanded (T t) const
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{
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return *this + cruft::vector<S,T> {t};
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}
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//-----------------------------------------------------------------------------
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template <size_t S, typename T>
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extent<S,T>
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extent<S,T>::contracted (vector<S,T> t) const
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{
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return *this - t;
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}
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//-----------------------------------------------------------------------------
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template <size_t S, typename T>
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extent<S,T>
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extent<S,T>::contracted (T t) const
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{
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return *this - vector<S,T> {t};
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}
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///////////////////////////////////////////////////////////////////////////////
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template <size_t S, typename T>
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bool
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extent<S,T>::empty (void) const
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{
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return almost_zero (area());
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}
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///////////////////////////////////////////////////////////////////////////////
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template <typename T>
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cruft::extent2<T>
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cruft::rotate90 (cruft::extent2<T> obj, int steps)
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{
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if (steps % 2) {
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return { obj.h, obj.w };
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} else {
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return obj;
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}
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}
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//-----------------------------------------------------------------------------
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template cruft::extent2<i32> cruft::rotate90 (cruft::extent2<i32>, int);
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template cruft::extent2<i64> cruft::rotate90 (cruft::extent2<i64>, int);
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template cruft::extent2<f32> cruft::rotate90 (cruft::extent2<f32>, int);
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///////////////////////////////////////////////////////////////////////////////
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namespace cruft::debug {
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template <size_t S, typename T>
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struct validator<extent<S,T>> {
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static bool is_valid (const extent<S,T> &e)
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{
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return std::all_of (std::begin (e.data),
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std::end (e.data),
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[] (auto i) { return i >= 0; });
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}
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};
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}
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//-----------------------------------------------------------------------------
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#define INSTANTIATE_S_T(S,T) \
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template struct ::cruft::extent<(S),T>; \
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template bool ::cruft::debug::is_valid (const ::cruft::extent<(S),T>&); \
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template struct ::cruft::debug::validator<::cruft::extent<(S),T>>;
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#define INSTANTIATE(T) \
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INSTANTIATE_S_T(1,T) \
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INSTANTIATE_S_T(2,T) \
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INSTANTIATE_S_T(3,T)
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INSTANTIATE( int16_t)
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INSTANTIATE( int32_t)
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INSTANTIATE( int64_t)
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INSTANTIATE(uint16_t)
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INSTANTIATE(uint32_t)
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INSTANTIATE(uint64_t)
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INSTANTIATE(float)
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INSTANTIATE(double)
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