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qpngio.h

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

/****************************************************************************
** $Id: qt/qpngio.h   3.3.8   edited Jan 11 14:38 $
**
** Definition of PNG TQImage IOHandler
**
** Created : 970521
**
** Copyright (C) 1992-2007 Trolltech ASA.  All rights reserved.
**
** This file is part of the kernel module of the TQt GUI Toolkit.
**
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** 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.
**
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** Public Licensing requirements will be met:
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** If you are unsure which license is appropriate for your use, please
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** included in the packaging of this file.  Licensees holding valid TQt
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**********************************************************************/

#ifndef TQPNGIO_H
#define TQPNGIO_H

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

#ifndef QT_NO_IMAGEIO_PNG

void qInitPngIO();

class TQIODevice;

#ifndef Q_PNGEXPORT
#if !defined(QT_PLUGIN)
#define Q_PNGEXPORT Q_EXPORT
#else
#define Q_PNGEXPORT
#endif
#endif

class Q_PNGEXPORT TQPNGImageWriter {
public:
    TQPNGImageWriter(TQIODevice*);
    ~TQPNGImageWriter();

    enum DisposalMethod { Unspecified, NoDisposal, RestoreBackground, RestoreImage };
    void setDisposalMethod(DisposalMethod);
    void setLooping(int loops=0); // 0 == infinity
    void setFrameDelay(int msecs);
    void setGamma(float);

    bool writeImage(const TQImage& img, int x, int y);
    bool writeImage(const TQImage& img, int quality, int x, int y);
    bool writeImage(const TQImage& img)
	{ return writeImage(img, 0, 0); }
    bool writeImage(const TQImage& img, int quality)
	{ return writeImage(img, quality, 0, 0); }

    TQIODevice* device() { return dev; }

private:
    TQIODevice* dev;
    int frames_written;
    DisposalMethod disposal;
    int looping;
    int ms_delay;
    float gamma;
};

class Q_PNGEXPORT TQPNGImagePacker : public TQPNGImageWriter {
public:
    TQPNGImagePacker(TQIODevice*, int depth, int convflags);

    void setPixelAlignment(int x);
    bool packImage(const TQImage& img);

private:
    TQImage previous;
    int depth;
    int convflags;
    int alignx;
};

#endif // QT_NO_IMAGEIO_PNG

#endif // TQPNGIO_H