| /* |
| * Copyright (C) 2017, 2020 Apple Inc. All rights reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions |
| * are met: |
| * |
| * 1. Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * 2. Redistributions in binary form must reproduce the above copyright |
| * notice, this list of conditions and the following disclaimer in the |
| * documentation and/or other materials provided with the distribution. |
| * |
| * THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "AS IS" AND ANY |
| * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED |
| * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE |
| * DISCLAIMED. IN NO EVENT SHALL APPLE OR ITS CONTRIBUTORS BE LIABLE FOR ANY |
| * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES |
| * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; |
| * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND |
| * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
| * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| */ |
| |
| #pragma once |
| |
| #include <algorithm> |
| #include <array> |
| #include <math.h> |
| #include <tuple> |
| |
| namespace WebCore { |
| |
| template<typename T> |
| struct ColorComponents { |
| constexpr static size_t Size = 4; |
| |
| constexpr ColorComponents(T a = 0, T b = 0, T c = 0, T d = 0) |
| : components { a, b, c, d } |
| { |
| } |
| |
| constexpr ColorComponents& operator+=(const ColorComponents&); |
| |
| constexpr ColorComponents operator+(T) const; |
| constexpr ColorComponents operator/(T) const; |
| constexpr ColorComponents operator*(T) const; |
| |
| constexpr ColorComponents abs() const; |
| |
| constexpr T& operator[](size_t i) { return components[i]; } |
| constexpr const T& operator[](size_t i) const { return components[i]; } |
| |
| template<std::size_t N> |
| constexpr T get() const; |
| |
| std::array<T, Size> components; |
| }; |
| |
| template<typename T> |
| constexpr ColorComponents<T>& ColorComponents<T>::operator+=(const ColorComponents& rhs) |
| { |
| components[0] += rhs[0]; |
| components[1] += rhs[1]; |
| components[2] += rhs[2]; |
| components[3] += rhs[3]; |
| return *this; |
| } |
| |
| template<typename T> |
| constexpr ColorComponents<T> ColorComponents<T>::operator+(T rhs) const |
| { |
| return { |
| components[0] + rhs, |
| components[1] + rhs, |
| components[2] + rhs, |
| components[3] + rhs |
| }; |
| } |
| |
| template<typename T> |
| constexpr ColorComponents<T> ColorComponents<T>::operator/(T denominator) const |
| { |
| return { |
| components[0] / denominator, |
| components[1] / denominator, |
| components[2] / denominator, |
| components[3] / denominator |
| }; |
| } |
| |
| template<typename T> |
| constexpr ColorComponents<T> ColorComponents<T>::operator*(T factor) const |
| { |
| return { |
| components[0] * factor, |
| components[1] * factor, |
| components[2] * factor, |
| components[3] * factor |
| }; |
| } |
| |
| template<typename T> |
| constexpr ColorComponents<T> ColorComponents<T>::abs() const |
| { |
| return { |
| std::abs(components[0]), |
| std::abs(components[1]), |
| std::abs(components[2]), |
| std::abs(components[3]) |
| }; |
| } |
| |
| template<typename T> |
| template<std::size_t N> |
| constexpr T ColorComponents<T>::get() const |
| { |
| return components[N]; |
| } |
| |
| template<typename T> |
| constexpr ColorComponents<T> perComponentMax(const ColorComponents<T>& a, const ColorComponents<T>& b) |
| { |
| return { |
| std::max(a[0], b[0]), |
| std::max(a[1], b[1]), |
| std::max(a[2], b[2]), |
| std::max(a[3], b[3]) |
| }; |
| } |
| |
| template<typename T> |
| constexpr ColorComponents<T> perComponentMin(const ColorComponents<T>& a, const ColorComponents<T>& b) |
| { |
| return { |
| std::min(a[0], b[0]), |
| std::min(a[1], b[1]), |
| std::min(a[2], b[2]), |
| std::min(a[3], b[3]) |
| }; |
| } |
| |
| template<typename T> |
| constexpr bool operator==(const ColorComponents<T>& a, const ColorComponents<T>& b) |
| { |
| return a.components == b.components; |
| } |
| |
| template<typename T> |
| constexpr bool operator!=(const ColorComponents<T>& a, const ColorComponents<T>& b) |
| { |
| return !(a == b); |
| } |
| |
| } // namespace WebCore |
| |
| namespace std { |
| |
| template<typename T> |
| class tuple_size<WebCore::ColorComponents<T>> : public std::integral_constant<std::size_t, WebCore::ColorComponents<T>::Size> { |
| }; |
| |
| template<std::size_t N, typename T> |
| class tuple_element<N, WebCore::ColorComponents<T>> { |
| public: |
| using type = T; |
| }; |
| |
| } |