1/****************************************************************************
2**
3** Copyright (C) 2016 The Qt Company Ltd.
4** Contact: https://www.qt.io/licensing/
5**
6** This file is part of the plugins of the Qt Toolkit.
7**
8** $QT_BEGIN_LICENSE:LGPL$
9** Commercial License Usage
10** Licensees holding valid commercial Qt licenses may use this file in
11** accordance with the commercial license agreement provided with the
12** Software or, alternatively, in accordance with the terms contained in
13** a written agreement between you and The Qt Company. For licensing terms
14** and conditions see https://www.qt.io/terms-conditions. For further
15** information use the contact form at https://www.qt.io/contact-us.
16**
17** GNU Lesser General Public License Usage
18** Alternatively, this file may be used under the terms of the GNU Lesser
19** General Public License version 3 as published by the Free Software
20** Foundation and appearing in the file LICENSE.LGPL3 included in the
21** packaging of this file. Please review the following information to
22** ensure the GNU Lesser General Public License version 3 requirements
23** will be met: https://www.gnu.org/licenses/lgpl-3.0.html.
24**
25** GNU General Public License Usage
26** Alternatively, this file may be used under the terms of the GNU
27** General Public License version 2.0 or (at your option) the GNU General
28** Public license version 3 or any later version approved by the KDE Free
29** Qt Foundation. The licenses are as published by the Free Software
30** Foundation and appearing in the file LICENSE.GPL2 and LICENSE.GPL3
31** included in the packaging of this file. Please review the following
32** information to ensure the GNU General Public License requirements will
33** be met: https://www.gnu.org/licenses/gpl-2.0.html and
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35**
36** $QT_END_LICENSE$
37**
38** WARNING:
39** A separate license from Unisys may be required to use the gif
40** reader. See http://www.unisys.com/about__unisys/lzw/
41** for information from Unisys
42**
43****************************************************************************/
44
45#ifndef QGIFHANDLER_P_H
46#define QGIFHANDLER_P_H
47
48//
49// W A R N I N G
50// -------------
51//
52// This file is not part of the Qt API. It exists purely as an
53// implementation detail. This header file may change from version to
54// version without notice, or even be removed.
55//
56// We mean it.
57//
58
59#include <QtGui/qimageiohandler.h>
60#include <QtGui/qimage.h>
61#include <QtCore/qbytearray.h>
62
63QT_BEGIN_NAMESPACE
64
65class QGIFFormat;
66class QGifHandler : public QImageIOHandler
67{
68public:
69 QGifHandler();
70 ~QGifHandler();
71
72 bool canRead() const override;
73 bool read(QImage *image) override;
74 bool write(const QImage &image) override;
75
76 static bool canRead(QIODevice *device);
77
78 QVariant option(ImageOption option) const override;
79 void setOption(ImageOption option, const QVariant &value) override;
80 bool supportsOption(ImageOption option) const override;
81
82 int imageCount() const override;
83 int loopCount() const override;
84 int nextImageDelay() const override;
85 int currentImageNumber() const override;
86
87private:
88 bool imageIsComing() const;
89 QGIFFormat *gifFormat;
90 QString fileName;
91 mutable QByteArray buffer;
92 mutable QImage lastImage;
93
94 mutable int nextDelay;
95 mutable int loopCnt;
96 int frameNumber;
97 mutable QList<QSize> imageSizes;
98 mutable bool scanIsCached;
99};
100
101QT_END_NAMESPACE
102
103#endif // QGIFHANDLER_P_H
104