Layer.h

/*
 * Copyright 2020 Adobe. All rights reserved.
 * This file is licensed to you 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 REPRESENTATIONS
 * OF ANY KIND, either express or implied. See the License for the specific language
 * governing permissions and limitations under the License.
 */
#pragma once
 
 
#include <bitset>
 
namespace lagrange {
namespace ui {
 
 
using LayerIndex = std::uint8_t;
 
constexpr size_t get_max_layers()
{
    return sizeof(LayerIndex) << 8;
}
 
struct Layer : public std::bitset<get_max_layers()>
{
    Layer(bool first_on = true)
    {
        reset();
        // First layer is on by default
        if (first_on) {
            set(0, true);
        }
    }
};
 
} // namespace ui
} // namespace lagrange