src/imageformats/ani_p.h

0001 /*
0002     SPDX-FileCopyrightText: 2020 Kai Uwe Broulik <kde@broulik.de>
0003
0004     SPDX-License-Identifier: LGPL-2.0-or-later
0005 */
0006
0007 #ifndef KIMG_ANI_P_H
0008 #define KIMG_ANI_P_H
0009
0010 #include <QImageIOPlugin>
0011 #include <QSize>
0012
0013 class ANIHandler : public QImageIOHandler
0014 {
0015 public:
0016     ANIHandler();
0017
0018     bool canRead() const override;
0019     bool read(QImage *image) override;
0020
0021     int currentImageNumber() const override;
0022     int imageCount() const override;
0023     bool jumpToImage(int imageNumber) override;
0024     bool jumpToNextImage() override;
0025
0026     int loopCount() const override;
0027     int nextImageDelay() const override;
0028
0029     bool supportsOption(ImageOption option) const override;
0030     QVariant option(ImageOption option) const override;
0031
0032     static bool canRead(QIODevice *device);
0033
0034 private:
0035     bool ensureScanned() const;
0036
0037     bool m_scanned = false;
0038
0039     int m_currentImageNumber = 0;
0040
0041     int m_frameCount = 0; // "physical" frames
0042     int m_imageCount = 0; // logical images
0043     // Stores a custom sequence of images
0044     QVector<int> m_imageSequence;
0045     // and the corresponding offsets where they are
0046     // since we can't read the image data sequentally in this case then
0047     QVector<qint64> m_frameOffsets;
0048     qint64 m_firstFrameOffset = 0;
0049
0050     int m_displayRate = 0;
0051     QVector<int> m_displayRates;
0052
0053     QString m_name;
0054     QString m_artist;
0055     QSize m_size;
0056 };
0057
0058 class ANIPlugin : public QImageIOPlugin
0059 {
0060     Q_OBJECT
0061     Q_PLUGIN_METADATA(IID "org.qt-project.Qt.QImageIOHandlerFactoryInterface" FILE "ani.json")
0062
0063 public:
0064     Capabilities capabilities(QIODevice *device, const QByteArray &format) const override;
0065     QImageIOHandler *create(QIODevice *device, const QByteArray &format = QByteArray()) const override;
0066 };
0067
0068 #endif // KIMG_ANI_P_H