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/*
* Copyright (C) 2016 The Android Open Source Project
*
* 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
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* 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.
*/
#ifndef UI_SCALAR_H
#define UI_SCALAR_H
#include <algorithm>
#include <cmath>
namespace android {
template<typename T>
static constexpr T saturate(T v) noexcept {
return T(std::min(T(1), std::max(T(0), v)));
}
template<typename T>
static constexpr T clamp(T v, T min, T max) noexcept {
return T(std::min(max, std::max(min, v)));
}
template<typename T>
static constexpr T mix(T x, T y, T a) noexcept {
return x * (T(1) - a) + y * a;
}
template<typename T>
static constexpr T lerp(T x, T y, T a) noexcept {
return mix(x, y, a);
}
} // namespace std
#endif // UI_SCALAR_H
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