/****************************************************************************
**
** Definition of asynchronous image/movie loading classes
**
** Created : 970617
**
** Copyright (C) 1992-2008 Trolltech ASA.  All rights reserved.
**
** This file is part of the kernel module of the TQt GUI Toolkit.
**
** This file may be used under the terms of the GNU General
** Public License versions 2.0 or 3.0 as published by the Free
** Software Foundation and appearing in the files LICENSE.GPL2
** and LICENSE.GPL3 included in the packaging of this file.
** Alternatively you may (at your option) use any later version
** of the GNU General Public License if such license has been
** publicly approved by Trolltech ASA (or its successors, if any)
** and the KDE Free TQt Foundation.
**
** Please review the following information to ensure GNU General
** Public Licensing requirements will be met:
** http://trolltech.com/products/qt/licenses/licensing/opensource/.
** If you are unsure which license is appropriate for your use, please
** review the following information:
** http://trolltech.com/products/qt/licenses/licensing/licensingoverview
** or contact the sales department at sales@trolltech.com.
**
** This file may be used under the terms of the Q Public License as
** defined by Trolltech ASA and appearing in the file LICENSE.TQPL
** included in the packaging of this file.  Licensees holding valid TQt
** Commercial licenses may use this file in accordance with the TQt
** Commercial License Agreement provided with the Software.
**
** This file is provided "AS IS" with NO WARRANTY OF ANY KIND,
** INCLUDING THE WARRANTIES OF DESIGN, MERCHANTABILITY AND FITNESS FOR
** A PARTICULAR PURPOSE. Trolltech reserves all rights not granted
** herein.
**
**********************************************************************/

#ifndef TQASYNCIMAGEIO_H
#define TQASYNCIMAGEIO_H

#ifndef QT_H
#include "tqimage.h"
#endif // QT_H

#ifndef TQT_NO_ASYNC_IMAGE_IO

#if __GNUC__ - 0 > 3
#pragma GCC system_header
#endif

class TQ_EXPORT TQImageConsumer {
public:
    virtual void end()=0;

    // Change transfer type 1.
    virtual void changed( const TQRect& ) = 0;
    virtual void frameDone() = 0;

    // Change transfer type 2.
    virtual void frameDone( const TQPoint&, const TQRect& ) = 0;

    virtual void setLooping( int ) = 0;
    virtual void setFramePeriod( int ) = 0;
    virtual void setSize( int, int ) = 0;
};

class TQ_EXPORT TQImageFormat {
public:
    virtual ~TQImageFormat();
    virtual int decode( TQImage& img, TQImageConsumer* consumer,
			const uchar* buffer, int length ) = 0;
};

class TQ_EXPORT TQImageFormatType {
public:
    virtual ~TQImageFormatType();
    virtual TQImageFormat* decoderFor( const uchar* buffer, int length ) = 0;
    virtual const char* formatName() const = 0;
protected:
    TQImageFormatType();
};

class TQImageDecoderPrivate;
class TQ_EXPORT TQImageDecoder {
public:
    TQImageDecoder( TQImageConsumer* c );
    ~TQImageDecoder();

    const TQImage& image() { return img; }
    int decode( const uchar* buffer, int length );

    static const char* formatName( const uchar* buffer, int length );
    static TQImageFormatType* format( const char* name ); // direct use - no decode()

    static TQStrList inputFormats();
    static void registerDecoderFactory( TQImageFormatType* );
    static void unregisterDecoderFactory( TQImageFormatType* );

private:
    TQImageFormat* actual_decoder;
    TQImageConsumer* consumer;
    TQImage img;
    TQImageDecoderPrivate *d;
};

#endif // TQT_NO_ASYNC_IMAGE_IO

#endif // TQASYNCIMAGEIO_H
