qgifhandler_p.h

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// Copyright (C) 2016 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only
 
#ifndef QGIFHANDLER_P_H
#define QGIFHANDLER_P_H
 
//
//  W A R N I N G
//  -------------
//
// This file is not part of the Qt API.  It exists purely as an
// implementation detail.  This header file may change from version to
// version without notice, or even be removed.
//
// We mean it.
//
 
#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 override;
    bool read(QImage *image) override;
    bool write(const QImage &image) override;
 
    static bool canRead(QIODevice *device);
 
    QVariant option(ImageOption option) const override;
    void setOption(ImageOption option, const QVariant &value) override;
    bool supportsOption(ImageOption option) const override;
 
    int imageCount() const override;
    int loopCount() const override;
    int nextImageDelay() const override;
    int currentImageNumber() const override;
 
private:
    bool imageIsComing() const;
    QGIFFormat *gifFormat;
    QString fileName;
    mutable QByteArray buffer;
    mutable QImage lastImage;
 
    mutable int nextDelay;
    mutable int loopCnt;
    int frameNumber;
    mutable QList<QSize> imageSizes;
    mutable bool scanIsCached;
};
 
QT_END_NAMESPACE
 
#endif // QGIFHANDLER_P_H