services/surfaceflinger/Scheduler/Seamlessness.h

/*
 * Copyright 2020 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 <cstring>
#include <ostream>

namespace android {
namespace scheduler {

// The seamlessness requirement of a Layer.
enum class Seamlessness {
    // Indicates a requirement for a seamless mode switch.
    OnlySeamless,
    // Indicates that both seamless and seamed mode switches are allowed.
    SeamedAndSeamless,
    // Indicates no preference for seamlessness. For such layers the system will
    // prefer seamless switches, but also non-seamless switches to the group of the
    // default config are allowed.
    Default
};

inline std::string toString(Seamlessness seamlessness) {
    switch (seamlessness) {
        case Seamlessness::OnlySeamless:
            return "OnlySeamless";
        case Seamlessness::SeamedAndSeamless:
            return "SeamedAndSeamless";
        case Seamlessness::Default:
            return "Default";
    }
}

// Used by gtest
inline std::ostream& operator<<(std::ostream& os, Seamlessness val) {
    return os << toString(val);
}

} // namespace scheduler
} // namespace android