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****************************************************************************/

#ifndef QIMAGEIOHANDLER_H

#define QIMAGEIOHANDLER_H

#include <QtCore/qplugin.h>

#include <QtCore/qfactoryinterface.h>

#include <QtCore/qscopedpointer.h>

QT_BEGIN_HEADER

QT_BEGIN_NAMESPACE

QT_MODULE(Gui)

class QImage;

class QRect;

class QSize;

class QVariant;

class QImageIOHandlerPrivate;

class Q_GUI_EXPORT QImageIOHandler

{

    Q_DECLARE_PRIVATE(QImageIOHandler)

public:

    QImageIOHandler();

    virtual ~QImageIOHandler();

    void setDevice(QIODevice *device);

    QIODevice *device() const;

    void setFormat(const QByteArray &format);

    void setFormat(const QByteArray &format) const;

    QByteArray format() const;

    virtual QByteArray name() const;

    virtual bool canRead() const = 0;

    virtual bool read(QImage *image) = 0;

    virtual bool write(const QImage &image);

    enum ImageOption {

        Size,

        ClipRect,

        Description,

        ScaledClipRect,

        ScaledSize,

        CompressionRatio,

        Gamma,

        Quality,

        Name,

        SubType,

        IncrementalReading,

        Endianness,

        Animation,

        BackgroundColor,

        ImageFormat

    };

    virtual QVariant option(ImageOption option) const;

    virtual void setOption(ImageOption option, const QVariant &value);

    virtual bool supportsOption(ImageOption option) const;

    // incremental loading

    virtual bool jumpToNextImage();

    virtual bool jumpToImage(int imageNumber);

    virtual int loopCount() const;

    virtual int imageCount() const;

    virtual int nextImageDelay() const;

    virtual int currentImageNumber() const;

    virtual QRect currentImageRect() const;

protected:

    QImageIOHandler(QImageIOHandlerPrivate &dd);

    QScopedPointer<QImageIOHandlerPrivate> d_ptr;

private:

    Q_DISABLE_COPY(QImageIOHandler)

};

struct Q_GUI_EXPORT QImageIOHandlerFactoryInterface : public QFactoryInterface

{

    virtual QImageIOHandler *create(QIODevice *device, const QByteArray &format = QByteArray()) const = 0;

};

#define QImageIOHandlerFactoryInterface_iid "com.trolltech.Qt.QImageIOHandlerFactoryInterface"

Q_DECLARE_INTERFACE(QImageIOHandlerFactoryInterface, QImageIOHandlerFactoryInterface_iid)

class Q_GUI_EXPORT QImageIOPlugin : public QObject, public QImageIOHandlerFactoryInterface

{

    Q_OBJECT

    Q_INTERFACES(QImageIOHandlerFactoryInterface:QFactoryInterface)

public:

    explicit QImageIOPlugin(QObject *parent = 0);

    virtual ~QImageIOPlugin();

    enum Capability {

        CanRead = 0x1,

        CanWrite = 0x2,

        CanReadIncremental = 0x4

    };

    Q_DECLARE_FLAGS(Capabilities, Capability)

    virtual Capabilities capabilities(QIODevice *device, const QByteArray &format) const = 0;

    virtual QStringList keys() const = 0;

    virtual QImageIOHandler *create(QIODevice *device, const QByteArray &format = QByteArray()) const = 0;

};

Q_DECLARE_OPERATORS_FOR_FLAGS(QImageIOPlugin::Capabilities)

QT_END_NAMESPACE

QT_END_HEADER

#endif // QIMAGEIOHANDLER_H