Daniel Novomeský d734f28727
jxl: indicate when all frames have been read
and return correct loop count
2022-10-18 17:58:40 +02:00

98 lines
2.3 KiB
C++

/*
JPEG XL (JXL) support for QImage.
SPDX-FileCopyrightText: 2021 Daniel Novomesky <dnovomesky@gmail.com>
SPDX-License-Identifier: BSD-2-Clause
*/
#ifndef KIMG_JXL_P_H
#define KIMG_JXL_P_H
#include <QByteArray>
#include <QColorSpace>
#include <QImage>
#include <QImageIOHandler>
#include <QImageIOPlugin>
#include <QVariant>
#include <QVector>
#include <jxl/decode.h>
class QJpegXLHandler : public QImageIOHandler
{
public:
QJpegXLHandler();
~QJpegXLHandler();
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 currentImageNumber() const override;
bool jumpToNextImage() override;
bool jumpToImage(int imageNumber) override;
int nextImageDelay() const override;
int loopCount() const override;
private:
bool ensureParsed() const;
bool ensureALLCounted() const;
bool ensureDecoder();
bool countALLFrames();
bool decode_one_frame();
bool rewind();
enum ParseJpegXLState {
ParseJpegXLError = -1,
ParseJpegXLNotParsed = 0,
ParseJpegXLSuccess = 1,
ParseJpegXLBasicInfoParsed = 2,
ParseJpegXLFinished = 3,
};
ParseJpegXLState m_parseState;
int m_quality;
int m_currentimage_index;
int m_previousimage_index;
QByteArray m_rawData;
JxlDecoder *m_decoder;
void *m_runner;
JxlBasicInfo m_basicinfo;
QVector<int> m_framedelays;
int m_next_image_delay;
QImage m_current_image;
QColorSpace m_colorspace;
QImage::Format m_input_image_format;
QImage::Format m_target_image_format;
JxlPixelFormat m_input_pixel_format;
size_t m_buffer_size;
};
class QJpegXLPlugin : public QImageIOPlugin
{
Q_OBJECT
Q_PLUGIN_METADATA(IID "org.qt-project.Qt.QImageIOHandlerFactoryInterface" FILE "jxl.json")
public:
Capabilities capabilities(QIODevice *device, const QByteArray &format) const override;
QImageIOHandler *create(QIODevice *device, const QByteArray &format = QByteArray()) const override;
};
#endif // KIMG_JXL_P_H