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# ntqasyncimageio.h

This is the verbatim text of the ntqasyncimageio.h include file. It is provided only for illustration; the copyright remains with Trolltech.

    /****************************************************************************
    ** $Id: qt/ntqasyncimageio.h   3.3.8   edited Jan 11 14:38 $
    **
    ** Definition of asynchronous image/movie loading classes
    **
    ** Created : 970617
    **
    ** Copyright (C) 1992-2007 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 file LICENSE.GPL 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
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    **********************************************************************/

    #ifndef TQASYNCIMAGEIO_H
    #define TQASYNCIMAGEIO_H

    #ifndef QT_H
    #include "ntqimage.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