Source/WebCore/html/canvas/GPUBasedCanvasRenderingContext.cpp

/*
 * Copyright (C) 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
 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
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 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */


#include "config.h"
#include "GPUBasedCanvasRenderingContext.h"

#include "HTMLCanvasElement.h"
#include "RenderBox.h"

namespace WebCore {

GPUBasedCanvasRenderingContext::GPUBasedCanvasRenderingContext(CanvasBase& canvas)
    : CanvasRenderingContext(canvas)
    , ActiveDOMObject(canvas.scriptExecutionContext())
{
}

HTMLCanvasElement* GPUBasedCanvasRenderingContext::htmlCanvas() const
{
    auto& base = canvasBase();
    if (!is<HTMLCanvasElement>(base))
        return nullptr;
    return &downcast<HTMLCanvasElement>(base);
}

void GPUBasedCanvasRenderingContext::notifyCanvasContentChanged()
{
    if (htmlCanvas()) {
        RenderBox* renderBox = htmlCanvas()->renderBox();
        if (renderBox && renderBox->hasAcceleratedCompositing())
            renderBox->contentChanged(CanvasChanged);
    }
}

} // namespace WebCore