Source/WebCore/html/canvas/GPUBasedCanvasRenderingContext.h

/*
 * Copyright (C) 2017-2019 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
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 */

#pragma once

#include "ActiveDOMObject.h"
#include "CanvasRenderingContext.h"
#include <wtf/IsoMalloc.h>

namespace WebCore {

class HTMLCanvasElement;

class GPUBasedCanvasRenderingContext : public CanvasRenderingContext, public ActiveDOMObject {
    WTF_MAKE_ISO_NONALLOCATABLE(GPUBasedCanvasRenderingContext);
public:

    bool isGPUBased() const override { return true; }

    bool isAccelerated() const override
    {
#if PLATFORM(WIN)
        // FIXME: Implement accelerated canvas on Windows.
        return false;
#else
        return true;
#endif
    }

    virtual void reshape(int width, int height) = 0;
    virtual void markLayerComposited() = 0;

protected:
    explicit GPUBasedCanvasRenderingContext(CanvasBase&);

    HTMLCanvasElement* htmlCanvas() const;
    void notifyCanvasContentChanged();
};
    
} // namespace WebCore

SPECIALIZE_TYPE_TRAITS_CANVASRENDERINGCONTEXT(WebCore::GPUBasedCanvasRenderingContext, isGPUBased())