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- /****************************************************************************
- ** $Id: qt/src/kernel/qasyncimageio.h 2.3.0 edited 2001-01-26 $
- **
- ** Definition of asynchronous image/movie loading classes
- **
- ** Created : 970617
- **
- ** Copyright (C) 1992-2000 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 QASYNCIMAGEIO_H
- #define QASYNCIMAGEIO_H
-
- #ifndef QT_H
- #include "qimage.h"
- #endif // QT_H
-
- #ifndef QT_NO_ASYNC_IMAGE_IO
-
-
- 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 // QT_NO_ASYNC_IMAGE_IO
-
- #endif // QASYNCIMAGEIO_H
-