/**************************************************************************** ** $Id: qt/src/kernel/qasyncimageio.h 2.1.1 edited 2000-03-24 $ ** ** Definition of asynchronous image/movie loading classes ** ** Created : 970617 ** ** Copyright (C) 1992-2000 Troll Tech AS. All rights reserved. ** ** This file is part of the Qt GUI Toolkit. ** ** This file may be distributed under the terms of the Q Public License ** as defined by Troll Tech AS of Norway and appearing in the file ** LICENSE.QPL included in the packaging of this file. ** ** Licensees holding valid Qt Professional Edition licenses may use this ** file in accordance with the Qt Professional Edition License Agreement ** provided with the Qt Professional Edition. ** ** See http://www.trolltech.com/pricing.html or email sales@trolltech.com for ** information about the Professional Edition licensing, or see ** http://www.trolltech.com/qpl/ for QPL licensing information. ** *****************************************************************************/ #ifndef QASYNCIMAGEIO_H #define QASYNCIMAGEIO_H #ifndef QT_H #include "qimage.h" #endif // QT_H class Q_EXPORT QImageConsumer { public: virtual void end()=0; // Change transfer type 1. virtual void changed( const QRect& ) = 0; virtual void frameDone() = 0; // Change transfer type 2. virtual void frameDone( const QPoint&, const QRect& ) = 0; virtual void setLooping( int ) = 0; virtual void setFramePeriod( int ) = 0; virtual void setSize( int, int ) = 0; }; class Q_EXPORT QImageFormat { public: virtual ~QImageFormat(); virtual int decode( QImage& img, QImageConsumer* consumer, const uchar* buffer, int length ) = 0; }; class Q_EXPORT QImageFormatType { public: virtual ~QImageFormatType(); virtual QImageFormat* decoderFor( const uchar* buffer, int length ) = 0; virtual const char* formatName() const = 0; protected: QImageFormatType(); }; struct QImageDecoderPrivate; class Q_EXPORT QImageDecoder { public: QImageDecoder( QImageConsumer* c ); ~QImageDecoder(); const QImage& image() { return img; } int decode( const uchar* buffer, int length ); static const char* formatName( const uchar* buffer, int length ); static QImageFormatType* format( const char* name ); // direct use - no decode() static QStrList inputFormats(); static void registerDecoderFactory( QImageFormatType* ); static void unregisterDecoderFactory( QImageFormatType* ); private: QImageFormat* actual_decoder; QImageConsumer* consumer; QImage img; QImageDecoderPrivate *d; }; #endif // QASYNCIMAGEIO_H
Copyright © 2000 Troll Tech | Trademarks | Qt version 2.1.1
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