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/*
* Copyright 2019 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.
*/
#pragma once
#include <type_traits>
namespace android::ui {
enum class Rotation { Rotation0 = 0, Rotation90 = 1, Rotation180 = 2, Rotation270 = 3 };
// Equivalent to Surface.java constants.
constexpr auto ROTATION_0 = Rotation::Rotation0;
constexpr auto ROTATION_90 = Rotation::Rotation90;
constexpr auto ROTATION_180 = Rotation::Rotation180;
constexpr auto ROTATION_270 = Rotation::Rotation270;
constexpr auto toRotation(std::underlying_type_t<Rotation> rotation) {
return static_cast<Rotation>(rotation);
}
constexpr auto toRotationInt(Rotation rotation) {
return static_cast<std::underlying_type_t<Rotation>>(rotation);
}
constexpr Rotation operator+(Rotation lhs, Rotation rhs) {
constexpr auto N = toRotationInt(ROTATION_270) + 1;
return toRotation((toRotationInt(lhs) + toRotationInt(rhs)) % N);
}
constexpr Rotation operator-(Rotation lhs, Rotation rhs) {
constexpr auto N = toRotationInt(ROTATION_270) + 1;
return toRotation((N + toRotationInt(lhs) - toRotationInt(rhs)) % N);
}
constexpr Rotation operator-(Rotation rotation) {
return ROTATION_0 - rotation;
}
constexpr const char* toCString(Rotation rotation) {
switch (rotation) {
case ROTATION_0:
return "ROTATION_0";
case ROTATION_90:
return "ROTATION_90";
case ROTATION_180:
return "ROTATION_180";
case ROTATION_270:
return "ROTATION_270";
}
}
} // namespace android::ui
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