/****************************************************************************
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** Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies).
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** Alternatively, this file may be used under the terms of the GNU General
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****************************************************************************/

#ifndef QSGCONTEXT_H
#define QSGCONTEXT_H

#include <QObject>
#include <qabstractanimation.h>

#include "qsgnode.h"

QT_BEGIN_HEADER

QT_BEGIN_NAMESPACE

QT_MODULE(Declarative)

class QSGContextPrivate;
class QSGRectangleNode;
class QSGImageNode;
class QSGGlyphNode;
class QSGRenderer;

class QSGTexture;
class QSGMaterial;
class QSGMaterialShader;
class QSGEngine;

class QGLContext;
class QGLFramebufferObject;

class Q_DECLARATIVE_EXPORT QSGContext : public QObject
{
    Q_OBJECT
    Q_DECLARE_PRIVATE(QSGContext)

public:
    explicit QSGContext(QObject *parent = 0);
    ~QSGContext();

    virtual void initialize(QGLContext *context);

    QSGRenderer *renderer() const;

    void setRootNode(QSGRootNode *node);
    QSGRootNode *rootNode() const;

    QSGEngine *engine() const;
    QGLContext *glContext() const;

    bool isReady() const;

    QSGMaterialShader *prepareMaterial(QSGMaterial *material);

    virtual void renderNextFrame(QGLFramebufferObject *fbo = 0);

    virtual QSGRectangleNode *createRectangleNode();
    virtual QSGImageNode *createImageNode();
    virtual QSGGlyphNode *createGlyphNode();
    virtual QSGRenderer *createRenderer();

    virtual bool canDecodeImageToTexture() const;
    virtual QSGTexture *decodeImageToTexture(QIODevice *dev,
                                                     QSize *size,
                                                     const QSize &requestSize);
    virtual QSGTexture *createTexture(const QImage &image = QImage()) const;
    virtual QSize minimumFBOSize() const;

    static QSGContext *createDefaultContext();

    void scheduleTextureForCleanup(QSGTexture *texture);
    void cleanupTextures();

    void setFlashModeEnabled(bool enabled);
    bool isFlashModeEnabled() const;

    void setRenderAlpha(qreal renderAlpha);
    qreal renderAlpha() const;

    void setDistanceFieldEnabled(bool enabled);
    bool isDistanceFieldEnabled() const;

    virtual QAnimationDriver *createAnimationDriver(QObject *parent);

signals:
    void ready();
};

QT_END_NAMESPACE

QT_END_HEADER

#endif // QSGCONTEXT_H