summaryrefslogtreecommitdiffstats
path: root/src/plugins/imageformats/gif/qgifhandler.h
blob: 8e07aff93186c6fc97f5d3dded284b45230db3b0 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
/****************************************************************************
**
** Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies).
** All rights reserved.
** Contact: Nokia Corporation (qt-info@nokia.com)
**
** This file is part of the plugins of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL$
** No Commercial Usage
** This file contains pre-release code and may not be distributed.
** You may use this file in accordance with the terms and conditions
** contained in the Technology Preview License Agreement accompanying
** this package.
**
** GNU Lesser General Public License Usage
** Alternatively, this file may be used under the terms of the GNU Lesser
** General Public License version 2.1 as published by the Free Software
** Foundation and appearing in the file LICENSE.LGPL included in the
** packaging of this file.  Please review the following information to
** ensure the GNU Lesser General Public License version 2.1 requirements
** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
**
** In addition, as a special exception, Nokia gives you certain additional
** rights.  These rights are described in the Nokia Qt LGPL Exception
** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
**
** If you have questions regarding the use of this file, please contact
** Nokia at qt-info@nokia.com.
**
**
**
**
**
**
**
**
** $QT_END_LICENSE$
**
** WARNING:
**      A separate license from Unisys may be required to use the gif
**      reader. See http://www.unisys.com/about__unisys/lzw/
**      for information from Unisys
**
****************************************************************************/

#ifndef QGIFHANDLER_H
#define QGIFHANDLER_H

#include <QtGui/qimageiohandler.h>
#include <QtGui/qimage.h>
#include <QtCore/qbytearray.h>

QT_BEGIN_NAMESPACE

class QGIFFormat;
class QGifHandler : public QImageIOHandler
{
public:
    QGifHandler();
    ~QGifHandler();

    bool canRead() const;
    bool read(QImage *image);
    bool write(const QImage &image);

    QByteArray name() const;

    static bool canRead(QIODevice *device);

    QVariant option(ImageOption option) const;
    void setOption(ImageOption option, const QVariant &value);
    bool supportsOption(ImageOption option) const;

    int imageCount() const;
    int loopCount() const;
    int nextImageDelay() const;
    int currentImageNumber() const;

private:
    bool imageIsComing() const;
    QGIFFormat *gifFormat;
    QString fileName;
    mutable QByteArray buffer;
    mutable QImage lastImage;

    mutable int nextDelay;
    mutable int loopCnt;
    int frameNumber;
    mutable QVector<QSize> imageSizes;
    mutable bool scanIsCached;
};

QT_END_NAMESPACE

#endif // QGIFHANDLER_H