RemoteRenderingBackendCreationParameters.h   [plain text]

/*
 * Copyright (C) 2020 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. AND ITS CONTRIBUTORS ``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 ITS CONTRIBUTORS
 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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 */

#pragma once

#if ENABLE(GPU_PROCESS)

#include "RenderingBackendIdentifier.h"
#include <wtf/MachSendRight.h>

namespace WebKit {

struct RemoteRenderingBackendCreationParameters {
    RenderingBackendIdentifier identifier;
#if PLATFORM(COCOA)
    MachSendRight sendRightForResumeDisplayListSemaphore;
#endif

    template<class Encoder> void encode(Encoder&) const;
    template<class Decoder> static Optional<RemoteRenderingBackendCreationParameters> decode(Decoder&);
};

template<class Encoder>
void RemoteRenderingBackendCreationParameters::encode(Encoder& encoder) const
{
    encoder << identifier;
#if PLATFORM(COCOA)
    encoder << sendRightForResumeDisplayListSemaphore;
#endif
}

template<class Decoder>
Optional<RemoteRenderingBackendCreationParameters> RemoteRenderingBackendCreationParameters::decode(Decoder& decoder)
{
    RemoteRenderingBackendCreationParameters parameters;

    Optional<RenderingBackendIdentifier> identifier;
    decoder >> identifier;
    if (!identifier)
        return WTF::nullopt;

    parameters.identifier = *identifier;

#if PLATFORM(COCOA)
    Optional<MachSendRight> sendRightForResumeDisplayListSemaphore;
    decoder >> sendRightForResumeDisplayListSemaphore;
    if (!sendRightForResumeDisplayListSemaphore)
        return WTF::nullopt;

    parameters.sendRightForResumeDisplayListSemaphore = WTFMove(*sendRightForResumeDisplayListSemaphore);
#endif

    return parameters;
}

} // namespace WebKit

#endif // ENABLE(GPU_PROCESS)