mirror of
https://invent.kde.org/frameworks/kimageformats.git
synced 2025-06-03 17:08:08 -04:00
b5d5abe0ea
Highlights of the patch: - Supersede MR !249 - Added FP16 and FP32 images support thus preserving HDR values (read / write, required libjxl 0.9+). - Added Gray8 and Gray16 support (read / write). - Indexed images are saved as Gray8 when palette is gray scale. - Binary images are saved as Gray8 (does JXL natively support binary images?). - Simplified writing process by partially removing the use of additional buffers. - Added XMP metadata support by decoding/encoding Boxes. - Changed maximum image size in pixels in accordance with JXL feature level 5 (still limited to 256 megapixels). Compatibility: - Older versions of this plugin load FP images correctly as UINT16 (obviously losing HDR info). - HDR images saved with this patch are also loaded correctly by Gimp and Photoshop. - Grayscale images saved with this patch are also loaded correctly by Gimp and Photoshop. Compilation modifiers for cmake file: - `JXL_HDR_PRESERVATION_DISABLED`: disable the FP support (behaves like previous versions). - `JXL_DECODE_BOXES_DISABLED`: disable metadata reading (behaves like previous versions).
101 lines
2.4 KiB
C++
101 lines
2.4 KiB
C++
/*
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JPEG XL (JXL) support for QImage.
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SPDX-FileCopyrightText: 2021 Daniel Novomesky <dnovomesky@gmail.com>
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SPDX-License-Identifier: BSD-2-Clause
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*/
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#ifndef KIMG_JXL_P_H
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#define KIMG_JXL_P_H
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#include <QByteArray>
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#include <QColorSpace>
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#include <QImage>
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#include <QImageIOHandler>
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#include <QImageIOPlugin>
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#include <QList>
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#include <QVariant>
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#include <jxl/decode.h>
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class QJpegXLHandler : public QImageIOHandler
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{
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public:
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QJpegXLHandler();
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~QJpegXLHandler();
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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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int imageCount() const override;
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int currentImageNumber() const override;
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bool jumpToNextImage() override;
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bool jumpToImage(int imageNumber) override;
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int nextImageDelay() const override;
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int loopCount() const override;
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private:
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bool ensureParsed() const;
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bool ensureALLCounted() const;
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bool ensureDecoder();
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bool countALLFrames();
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bool decode_one_frame();
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bool rewind();
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bool decodeBoxes();
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enum ParseJpegXLState {
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ParseJpegXLError = -1,
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ParseJpegXLNotParsed = 0,
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ParseJpegXLSuccess = 1,
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ParseJpegXLBasicInfoParsed = 2,
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ParseJpegXLFinished = 3,
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};
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ParseJpegXLState m_parseState;
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int m_quality;
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int m_currentimage_index;
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int m_previousimage_index;
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QImageIOHandler::Transformations m_transformations;
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QByteArray m_rawData;
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JxlDecoder *m_decoder;
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void *m_runner;
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JxlBasicInfo m_basicinfo;
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QList<int> m_framedelays;
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int m_next_image_delay;
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QImage m_current_image;
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QColorSpace m_colorspace;
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QByteArray m_xmp;
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QImage::Format m_input_image_format;
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QImage::Format m_target_image_format;
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JxlPixelFormat m_input_pixel_format;
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size_t m_buffer_size;
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};
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class QJpegXLPlugin : 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 "jxl.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_JXL_P_H
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