Source/WebCore/platform/graphics/displaylists/DisplayListDrawingContext.h

/*
 * Copyright (C) 2020-2021 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
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 * 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,
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 */

#pragma once

#include "DisplayList.h"
#include "DisplayListRecorderImpl.h"
#include "GraphicsContext.h"

namespace WebCore {
namespace DisplayList {

class InMemoryDisplayList;

class DrawingContext {
    WTF_MAKE_FAST_ALLOCATED;
public:
    WEBCORE_EXPORT DrawingContext(const FloatSize& logicalSize, const AffineTransform& initialCTM = { }, RecorderImpl::Delegate* = nullptr);

    GraphicsContext& context() const { return const_cast<DrawingContext&>(*this).m_context; }
    RecorderImpl& recorder() { return m_context; };
    DisplayList takeDisplayList() { return std::exchange(m_displayList, { }); }
    DisplayList& displayList() { return m_displayList; }
    const DisplayList& displayList() const { return m_displayList; }
    const InMemoryDisplayList* replayedDisplayList() const { return m_replayedDisplayList.get(); }

    WEBCORE_EXPORT void setTracksDisplayListReplay(bool);
    WEBCORE_EXPORT void replayDisplayList(GraphicsContext&);

protected:
    RecorderImpl m_context;
    DisplayList m_displayList;
    std::unique_ptr<InMemoryDisplayList> m_replayedDisplayList;
    bool m_tracksDisplayListReplay { false };
};

} // DisplayList
} // WebCore