Source/WebCore/Modules/webxr/WebXRLayer.h

/*
 * Copyright (C) 2020 Igalia S.L. 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
 * 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

#if ENABLE(WEBXR)

#include "ContextDestructionObserver.h"
#include "EventTarget.h"
#include "PlatformXR.h"
#include <wtf/IsoMalloc.h>
#include <wtf/RefCounted.h>

namespace WebCore {

class ScriptExecutionContext;

class WebXRLayer : public RefCounted<WebXRLayer>, public EventTargetWithInlineData, public ContextDestructionObserver {
    WTF_MAKE_ISO_ALLOCATED(WebXRLayer);
public:
    ~WebXRLayer();

    using RefCounted<WebXRLayer>::ref;
    using RefCounted<WebXRLayer>::deref;

    virtual void startFrame(const PlatformXR::Device::FrameData&) = 0;
    virtual PlatformXR::Device::Layer endFrame() = 0;

protected:
    explicit WebXRLayer(ScriptExecutionContext*);

    // EventTarget
    ScriptExecutionContext* scriptExecutionContext() const final { return ContextDestructionObserver::scriptExecutionContext(); }

private:
    // EventTarget
    EventTargetInterface eventTargetInterface() const final { return WebXRLayerEventTargetInterfaceType; }
    void refEventTarget() final { ref(); }
    void derefEventTarget() final { deref(); }
};

} // namespace WebCore

#endif // ENABLE(WEBXR)