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In recent libheif, application should use heif_init/heif_deinit calls. Unfortunately, these calls are not thread-safe in released 1.13.0 version yet (will be in the future) and HEIFHandler is often created in different threads. So we have to guard their use with a mutex.
75 lines
1.9 KiB
C++
75 lines
1.9 KiB
C++
/*
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High Efficiency Image File Format (HEIF) support for QImage.
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SPDX-FileCopyrightText: 2020 Sirius Bakke <sirius@bakke.co>
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SPDX-FileCopyrightText: 2021 Daniel Novomesky <dnovomesky@gmail.com>
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SPDX-License-Identifier: LGPL-2.0-or-later
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*/
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#ifndef KIMG_HEIF_P_H
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#define KIMG_HEIF_P_H
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#include <QByteArray>
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#include <QImage>
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#include <QImageIOPlugin>
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#include <QMutex>
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class HEIFHandler : public QImageIOHandler
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{
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public:
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HEIFHandler();
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bool canRead() const override;
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bool read(QImage *image) override;
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bool write(const QImage &image) override;
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static bool canRead(QIODevice *device);
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QVariant option(ImageOption option) const override;
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void setOption(ImageOption option, const QVariant &value) override;
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bool supportsOption(ImageOption option) const override;
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static bool isHeifDecoderAvailable();
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static bool isHeifEncoderAvailable();
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private:
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static bool isSupportedBMFFType(const QByteArray &header);
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bool ensureParsed() const;
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bool ensureDecoder();
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enum ParseHeicState {
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ParseHeicError = -1,
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ParseHeicNotParsed = 0,
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ParseHeicSuccess = 1,
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};
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ParseHeicState m_parseState;
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int m_quality;
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QImage m_current_image;
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bool write_helper(const QImage &image);
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static void startHeifLib();
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static void finishHeifLib();
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static size_t m_initialized_count;
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static bool m_plugins_queried;
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static bool m_heif_decoder_available;
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static bool m_heif_encoder_available;
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static QMutex &getHEIFHandlerMutex();
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};
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class HEIFPlugin : public QImageIOPlugin
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{
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Q_OBJECT
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Q_PLUGIN_METADATA(IID "org.qt-project.Qt.QImageIOHandlerFactoryInterface" FILE "heif.json")
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public:
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Capabilities capabilities(QIODevice *device, const QByteArray &format) const override;
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QImageIOHandler *create(QIODevice *device, const QByteArray &format = QByteArray()) const override;
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};
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#endif // KIMG_HEIF_P_H
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