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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN"><html><head><meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1"><title>Qt Toolkit - qpngio.h include file</title><style type="text/css"><!--h3.fn,span.fn { margin-left: 1cm; text-indent: -1cm; }a:link { color: #004faf; text-decoration: none }a:visited { color: #672967; text-decoration: none }body { background: white; color: black; }--></style></head><body bgcolor="#ffffff"><table width="100%"><tr><td><a href="index.html"><img width="100" height="100" src="qtlogo.png"alt="Home" border="0"><img width="100"height="100" src="face.png" alt="Home" border="0"></a><td valign="top"><div align="right"><img src="dochead.png" width="472" height="27"><br><a href="classes.html"><b>Classes</b></a>- <a href="annotated.html">Annotated</a>- <a href="hierarchy.html">Tree</a>- <a href="functions.html">Functions</a>- <a href="index.html">Home</a>- <a href="topicals.html"><b>Structure</b> <font face="Arial,Helvetica,Geneva,Swiss,SunSans-Regular" align="center" size=32>Qte</font></a></div></table><h1 align=center>qpngio.h</h1><br clear="all">This is the verbatim text of the qpngio.h include file. It isprovided only for illustration; the copyrightremains with Trolltech.<hr><pre>/****************************************************************************** $Id: qt/src/kernel/qpngio.h 2.3.8 edited 2004-05-12 $**** Definition of PNG QImage IOHandler**** Created : 970521**** Copyright (C) 1992-1998 Trolltech AS. All rights reserved.**** This file is part of the kernel module of the Qt GUI Toolkit.**** This file may be distributed under the terms of the Q Public License** as defined by Trolltech AS of Norway and appearing in the file** LICENSE.QPL included in the packaging of this file.**** This file may be distributed and/or modified under the terms of the** GNU General Public License version 2 as published by the Free Software** Foundation and appearing in the file LICENSE.GPL included in the** packaging of this file.**** Licensees holding valid Qt Enterprise Edition or Qt Professional Edition** licenses may use this file in accordance with the Qt Commercial License** Agreement provided with the Software.**** This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE** WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.**** See http://www.trolltech.com/pricing.html or email sales@trolltech.com for** information about Qt Commercial License Agreements.** See http://www.trolltech.com/qpl/ for QPL licensing information.** See http://www.trolltech.com/gpl/ for GPL licensing information.**** Contact info@trolltech.com if any conditions of this licensing are** not clear to you.************************************************************************/#ifndef QPNGIO_H#define QPNGIO_H#ifndef QT_H#include <qimage.h>#endif // QT_H#ifndef QT_NO_IMAGEIO_PNGvoid qInitPngIO();class <a href="qiodevice.html">QIODevice</a>;class <a href="qimage.html">QImage</a>;class Q_EXPORT QPNGImageWriter {public: QPNGImageWriter(QIODevice*); ~QPNGImageWriter(); enum DisposalMethod { Unspecified, NoDisposal, RestoreBackground, RestoreImage }; void setDisposalMethod(DisposalMethod); void setLooping(int loops=0); // 0 == infinity void setFrameDelay(int msecs); bool writeImage(const QImage& img, int x, int y); bool writeImage(const QImage& img, int quality, int x, int y); bool writeImage(const QImage& img) { return writeImage(img, 0, 0); } bool writeImage(const QImage& img, int quality) { return writeImage(img, quality, 0, 0); } QIODevice* device() { return dev; }private: QIODevice* dev; int frames_written; DisposalMethod disposal; int looping; int ms_delay;};class Q_EXPORT <a href="qpngimagepacker.html">QPNGImagePacker</a> : public QPNGImageWriter {public: QPNGImagePacker(QIODevice*, int depth, int convflags); void setPixelAlignment(int x); bool packImage(const QImage& img);private: QImage previous; int depth; int convflags; int alignx;};#endif // QT_NO_IMAGEIO_PNG#endif // QPNGIO_H</pre><p><address><hr><div align="center"><table width="100%" cellspacing="0" border="0"><tr><td>Copyright ⌨️ 快捷键说明
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