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src/qt/src/kernel/qpngio.h
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00001 /****************************************************************************
00002 ** $Id: qt/qpngio.h   3.3.8   edited Jan 11 14:38 $
00003 **
00004 ** Definition of PNG QImage IOHandler
00005 **
00006 ** Created : 970521
00007 **
00008 ** Copyright (C) 1992-2007 Trolltech ASA.  All rights reserved.
00009 **
00010 ** This file is part of the kernel module of the Qt GUI Toolkit.
00011 **
00012 ** This file may be distributed under the terms of the Q Public License
00013 ** as defined by Trolltech ASA of Norway and appearing in the file
00014 ** LICENSE.QPL included in the packaging of this file.
00015 **
00016 ** This file may be distributed and/or modified under the terms of the
00017 ** GNU General Public License version 2 as published by the Free Software
00018 ** Foundation and appearing in the file LICENSE.GPL included in the
00019 ** packaging of this file.
00020 **
00021 ** Licensees holding valid Qt Enterprise Edition or Qt Professional Edition
00022 ** licenses may use this file in accordance with the Qt Commercial License
00023 ** Agreement provided with the Software.
00024 **
00025 ** This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE
00026 ** WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
00027 **
00028 ** See http://www.trolltech.com/pricing.html or email sales@trolltech.com for
00029 **   information about Qt Commercial License Agreements.
00030 ** See http://www.trolltech.com/qpl/ for QPL licensing information.
00031 ** See http://www.trolltech.com/gpl/ for GPL licensing information.
00032 **
00033 ** Contact info@trolltech.com if any conditions of this licensing are
00034 ** not clear to you.
00035 **
00036 **********************************************************************/
00037 
00038 #ifndef QPNGIO_H
00039 #define QPNGIO_H
00040 
00041 #ifndef QT_H
00042 #include "qimage.h"
00043 #endif // QT_H
00044 
00045 #ifndef QT_NO_IMAGEIO_PNG
00046 
00047 void qInitPngIO();
00048 
00049 class QIODevice;
00050 
00051 #ifndef Q_PNGEXPORT
00052 #if !defined(QT_PLUGIN)
00053 #define Q_PNGEXPORT Q_EXPORT
00054 #else
00055 #define Q_PNGEXPORT
00056 #endif
00057 #endif
00058 
00059 class Q_PNGEXPORT QPNGImageWriter {
00060 public:
00061     QPNGImageWriter(QIODevice*);
00062     ~QPNGImageWriter();
00063 
00064     enum DisposalMethod { Unspecified, NoDisposal, RestoreBackground, RestoreImage };
00065     void setDisposalMethod(DisposalMethod);
00066     void setLooping(int loops=0); // 0 == infinity
00067     void setFrameDelay(int msecs);
00068     void setGamma(float);
00069 
00070     bool writeImage(const QImage& img, int x, int y);
00071     bool writeImage(const QImage& img, int quality, int x, int y);
00072     bool writeImage(const QImage& img)
00073         { return writeImage(img, 0, 0); }
00074     bool writeImage(const QImage& img, int quality)
00075         { return writeImage(img, quality, 0, 0); }
00076 
00077     QIODevice* device() { return dev; }
00078 
00079 private:
00080     QIODevice* dev;
00081     int frames_written;
00082     DisposalMethod disposal;
00083     int looping;
00084     int ms_delay;
00085     float gamma;
00086 };
00087 
00088 class Q_PNGEXPORT QPNGImagePacker : public QPNGImageWriter {
00089 public:
00090     QPNGImagePacker(QIODevice*, int depth, int convflags);
00091 
00092     void setPixelAlignment(int x);
00093     bool packImage(const QImage& img);
00094 
00095 private:
00096     QImage previous;
00097     int depth;
00098     int convflags;
00099     int alignx;
00100 };
00101 
00102 #endif // QT_NO_IMAGEIO_PNG
00103 
00104 #endif // QPNGIO_H
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