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/****************************************************************************
**
** Copyright (C) 2021 The Qt Company Ltd.
** Contact: https://www.qt.io/licensing/
**
** This file is part of the QtQuick module of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:COMM$
**
** Commercial License Usage
** Licensees holding valid commercial Qt licenses may use this file in
** accordance with the commercial license agreement provided with the
** Software or, alternatively, in accordance with the terms contained in
** a written agreement between you and The Qt Company. For licensing terms
** and conditions see https://www.qt.io/terms-conditions. For further
** information use the contact form at https://www.qt.io/contact-us.
**
** $QT_END_LICENSE$
**
**
**
**
**
**
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**
**
****************************************************************************/

#ifndef QSGRENDERNODE_H
#define QSGRENDERNODE_H

#include <QtQuick/qsgnode.h>

QT_BEGIN_NAMESPACE

class QSGRenderNodePrivate;

class Q_QUICK_EXPORT QSGRenderNode : public QSGNode
{
public:
    enum StateFlag {
        DepthState = 0x01,
        StencilState = 0x02,
        ScissorState = 0x04,
        ColorState = 0x08,
        BlendState = 0x10,
        CullState = 0x20,
        ViewportState = 0x40,
        RenderTargetState = 0x80
    };
    Q_DECLARE_FLAGS(StateFlags, StateFlag)

    enum RenderingFlag {
        BoundedRectRendering = 0x01,
        DepthAwareRendering = 0x02,
        OpaqueRendering = 0x04
    };
    Q_DECLARE_FLAGS(RenderingFlags, RenderingFlag)

    struct Q_QUICK_EXPORT RenderState {
        virtual ~RenderState();
        virtual const QMatrix4x4 *projectionMatrix() const = 0;
        virtual QRect scissorRect() const = 0;
        virtual bool scissorEnabled() const = 0;
        virtual int stencilValue() const = 0;
        virtual bool stencilEnabled() const = 0;
        virtual const QRegion *clipRegion() const = 0;
        virtual void *get(const char *state) const;
    };

    QSGRenderNode();
    ~QSGRenderNode() override;

    virtual StateFlags changedStates() const;
    virtual void render(const RenderState *state) = 0;
    virtual void releaseResources();
    virtual RenderingFlags flags() const;
    virtual QRectF rect() const;

    const QMatrix4x4 *matrix() const;
    const QSGClipNode *clipList() const;
    qreal inheritedOpacity() const;

private:
    QSGRenderNodePrivate *d;
    friend class QSGRenderNodePrivate;
};

Q_DECLARE_OPERATORS_FOR_FLAGS(QSGRenderNode::StateFlags)
Q_DECLARE_OPERATORS_FOR_FLAGS(QSGRenderNode::RenderingFlags)

QT_END_NAMESPACE

#endif