Source/WebCore/Modules/model-element/HTMLModelElementCamera.h

/*
 * Copyright (C) 2021 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 INC. ``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 INC. OR
 * 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 <optional>

namespace WebCore {

struct HTMLModelElementCamera {
    double pitch { 0 };
    double yaw { 0 };
    double scale { 1 };

    template<class Encoder> void encode(Encoder&) const;
    template<class Decoder> static std::optional<HTMLModelElementCamera> decode(Decoder&);
};

template<class Encoder> void HTMLModelElementCamera::encode(Encoder& encoder) const
{
    encoder << pitch;
    encoder << yaw;
    encoder << scale;
}

template<class Decoder> std::optional<HTMLModelElementCamera> HTMLModelElementCamera::decode(Decoder& decoder)
{
    std::optional<double> pitch;
    decoder >> pitch;
    if (!pitch)
        return std::nullopt;

    std::optional<double> yaw;
    decoder >> yaw;
    if (!yaw)
        return std::nullopt;

    std::optional<double> scale;
    decoder >> scale;
    if (!scale)
        return std::nullopt;

    return { { *pitch, *yaw, *scale } };
}

} // namespace WebCore