/****************************************************************************
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** Copyright (C) 2012 Digia Plc and/or its subsidiary(-ies).
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** This file is part of the QtQml module of the Qt Toolkit.
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** General Public License version 2.1 as published by the Free Software
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** ensure the GNU Lesser General Public License version 2.1 requirements
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** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
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** Alternatively, this file may be used under the terms of the GNU
** General Public License version 3.0 as published by the Free Software
** Foundation and appearing in the file LICENSE.GPL included in the
** packaging of this file.  Please review the following information to
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****************************************************************************/

#ifndef QSGCONTEXT_H
#define QSGCONTEXT_H

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

#include <QtGui/QImage>
#include <QtGui/QSurfaceFormat>

#include <private/qtquickglobal_p.h>
#include <private/qrawfont_p.h>

#include <QtQuick/qsgnode.h>
#include <QtQuick/private/qsgdepthstencilbuffer_p.h>

QT_BEGIN_HEADER

QT_BEGIN_NAMESPACE


class QSGContextPrivate;
class QSGRectangleNode;
class QSGImageNode;
class QSGGlyphNode;
class QSGRenderer;
class QSGDistanceFieldGlyphCache;
class QQuickWindow;
class QSGTexture;
class QSGMaterial;
class QSGMaterialShader;
class QQuickWindowManager;

class QOpenGLContext;
class QOpenGLFramebufferObject;

class QQuickTextureFactory;

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

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

    virtual void initialize(QOpenGLContext *context);
    virtual void invalidate();

    QOpenGLContext *glContext() const;

    bool isReady() const;

    QSGMaterialShader *prepareMaterial(QSGMaterial *material);

    virtual void renderNextFrame(QSGRenderer *renderer, GLuint fboId);

    virtual QSGDistanceFieldGlyphCache *distanceFieldGlyphCache(const QRawFont &font);

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

    virtual QSGTexture *createTexture(const QImage &image = QImage()) const;
    virtual QSize minimumFBOSize() const;
    virtual QSharedPointer<QSGDepthStencilBuffer> depthStencilBufferForFbo(QOpenGLFramebufferObject *fbo);
    QSGDepthStencilBufferManager *depthStencilBufferManager();

    virtual QSurfaceFormat defaultSurfaceFormat() const;

    QSGTexture *textureForFactory(QQuickTextureFactory *factory, QQuickWindow *window);

    static QSGContext *createDefaultContext();

    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);

    static QQuickTextureFactory *createTextureFactoryFromImage(const QImage &image);
    static QQuickWindowManager *createWindowManager();


public slots:
    void textureFactoryDestroyed(QObject *o);

signals:
    void initialized();
    void invalidated();
};

QT_END_NAMESPACE

QT_END_HEADER

#endif // QSGCONTEXT_H
