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#ifndef QSIMPLECANVASFILTER_H
#define QSIMPLECANVASFILTER_H

#include <QtCore/qobject.h>
#include <qfxglobal.h>
#include <qsimplecanvasitem.h>
#include <qsimplecanvas.h>


QT_BEGIN_HEADER

QT_BEGIN_NAMESPACE

QT_MODULE(Declarative)
class QSimpleCanvasFilterPrivate;
class QRectF;
class QPoint;
class QGLFramebufferObject;
class GLShaderProgram;
class Q_DECLARATIVE_EXPORT QSimpleCanvasFilter : public QObject
{
Q_OBJECT
public:
    QSimpleCanvasFilter(QObject *parent);
    virtual ~QSimpleCanvasFilter();

    enum Layer { ChildrenUnderItem = 0x01, 
                 Item = 0x02, 
                 ChildrenAboveItem = 0x04,
                 All = 0x07 };

    Q_PROPERTY(bool enabled READ enabled WRITE setEnabled NOTIFY enabledChanged);
    bool enabled() const;
    void setEnabled(bool);

    QSimpleCanvasItem *item() const;
    void setItem(QSimpleCanvasItem *);
Q_SIGNALS:
    void enabledChanged();

protected:

    virtual QRectF itemBoundingRect(const QRectF &) const;
    virtual void filterGL(QSimpleCanvasItem::GLPainter &p);
    virtual void filter(QPainter &p);

    QGLFramebufferObject *renderToFBO(const QRectF &src = QRect(), const QPoint &offset = QPoint(), Layer = All);
    QGLFramebufferObject *renderToFBO(float scale, const QRectF &src = QRect(), const QPoint &offset = QPoint(), Layer = All);
    QGLFramebufferObject *acquireFBO(const QSize & = QSize());
    void releaseFBO(QGLFramebufferObject *);

    void renderToScreen(const QRectF &src = QRect(), Layer = All);
    void renderToScreen(const QSimpleCanvas::Matrix &trans, const QRectF &src = QRect(), Layer = All);

    void update();

    bool isSimpleItem(QSimpleCanvasItem **, QSimpleCanvas::Matrix *);

private:
    friend class QSimpleCanvasFilterPrivate;
    friend class QSimpleCanvasItemPrivate;
    friend class QSimpleCanvasItem;

    QSimpleCanvasFilterPrivate *d;
};



QT_END_NAMESPACE

QT_END_HEADER
#endif