/****************************************************************************
**
** Copyright (C) 2016 The Qt Company Ltd.
** Contact: https://www.qt.io/licensing/
**
** This file is part of the QtQuick module of the Qt Toolkit.
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** $QT_BEGIN_LICENSE:LGPL$
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** General Public License version 3 as published by the Free Software
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** ensure the GNU Lesser General Public License version 3 requirements
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** Alternatively, this file may be used under the terms of the GNU
** General Public License version 2.0 or (at your option) the GNU General
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** included in the packaging of this file. Please review the following
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****************************************************************************/

#ifndef QQUICKCANVASCONTEXT_P_H
#define QQUICKCANVASCONTEXT_P_H

//
//  W A R N I N G
//  -------------
//
// This file is not part of the Qt API.  It exists purely as an
// implementation detail.  This header file may change from version to
// version without notice, or even be removed.
//
// We mean it.
//

#include <private/qtquickglobal_p.h>

QT_REQUIRE_CONFIG(quick_canvas);

#include <QtQuick/qquickitem.h>
#include <QtQml/private/qv4value_p.h>

QT_BEGIN_NAMESPACE

class QQuickCanvasItem;
class QSGLayer;

class QQuickCanvasContext : public QObject
{
    Q_OBJECT

public:
    QQuickCanvasContext(QObject *parent = nullptr);
    ~QQuickCanvasContext();

    virtual QStringList contextNames() const = 0;

    // Init (ignore options if necessary)
    virtual void init(QQuickCanvasItem *canvasItem, const QVariantMap &args) = 0;

    virtual void prepare(const QSize& canvasSize, const QSize& tileSize, const QRect& canvasWindow, const QRect& dirtyRect, bool smooth, bool antialiasing);
    virtual void flush();

    virtual QV4::ExecutionEngine *v4Engine() const = 0;
    virtual void setV4Engine(QV4::ExecutionEngine *engine) = 0;
    virtual QV4::ReturnedValue v4value() const = 0;

    virtual QImage toImage(const QRectF& bounds) = 0;

Q_SIGNALS:
    void textureChanged();
};

QT_END_NAMESPACE

#endif //QQUICKCANVASCONTEXT_P_H
