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Camera RAW images plugin

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Plugin to read RAW camera images based on LibRAW.

- Supersedes MR !86 
- Support to LibRaw 0.20 and 0.21-Beta
- Support to multi-shot images: use imageCount(), jumpToImage() to select the wanted shot
- By default generates 16-bits sRGB images using camera white balance and interpolation AHD
- Should fix CCBUG: 454208: on my Debian with KF5.96 and the pulgin installed, I see the preview of all my RAW files (ARW included) in Dolphin

News compared to V1 (MR !86)

- Fix possible stack overflow due to the huge size of LibRaw class
- Fix image allocation with Qt 6 (make use of QImageIOHandler::allocateImage()) 
- Support to XMP metapacket
- Support to quality option. For e.g. you can focus on quality (q = 10) or speed (q = 1)
- oss-fuzz available [here](https://github.com/mircomir/oss-fuzz/tree/raw_fuzz/projects/kimageformats)
This commit is contained in:
Mirco Miranda
2022-09-19 23:52:43 +00:00
committed by Nicolás Alvarez
parent 84941b7690
commit 65a20b43fc
13 changed files with 2053 additions and 2 deletions
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93
src/imageformats/raw_p.h Normal file
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/*
This file is part of the KDE project
SPDX-FileCopyrightText: 2022 Mirco Miranda <mircomir@outlook.com>
SPDX-License-Identifier: LGPL-2.0-or-later
*/
#ifndef KIMG_RAW_P_H
#define KIMG_RAW_P_H
#include <QImageIOPlugin>
class RAWHandler : public QImageIOHandler
{
public:
RAWHandler();
bool canRead() const override;
bool read(QImage *image) override;
void setOption(ImageOption option, const QVariant &value) override;
bool supportsOption(QImageIOHandler::ImageOption option) const override;
QVariant option(QImageIOHandler::ImageOption option) const override;
bool jumpToNextImage() override;
bool jumpToImage(int imageNumber) override;
int imageCount() const override;
int currentImageNumber() const override;
static bool canRead(QIODevice *device);
private:
qint32 m_imageNumber;
mutable qint32 m_imageCount;
/**
* @brief m_quality
* Change the quality of the conversion. If -1, default quality is used.
* @note Verify that the quality change support has been compiled with supportsOption()
*
* 3 2 1 0
* 1 0 9 8 7 6 5 4 3 2 1 0 9 87 6 5 4 3 2 1098 7654 3210
* _ _ _ _ _ _ _ _ _ _ _ S F NN E H B A W CCCC IIII PPPP
*
* Where:
*
* _: reserved
* P: preset values: *** if set, other flags are ignored! ***
* - 0: Use other flags (no preset)
* - 1: I = 0, C = 1, B = 0, W = 1, A = 1, H = 1 (Linear, sRGB, 8-bits, Camera White, Auto White, Half-size)
* - 2: I = 0, C = 1, B = 0, W = 1, A = 1, H = 0 (Linear, sRGB, 8-bits, Camera White, Auto White)
* - 3: I = 3, C = 1, B = 0, W = 1, A = 1, H = 0 (AHD, sRGB, 8-bits, Camera White, Auto White)
* - 4: I = 3, C = 1, B = 1, W = 1, A = 1, H = 0 (AHD, sRGB, 16-bits, Camera White, Auto White)
* - 5: I = 3, C = 2, B = 1, W = 1, A = 1, H = 0 (AHD, Adobe, 16-bits, Camera White, Auto White)
* - 6: I = 3, C = 4, B = 1, W = 1, A = 1, H = 0 (AHD, ProPhoto, 16-bits, Camera White, Auto White)
* - 7: I = 11, C = 1, B = 0, W = 1, A = 1, H = 0 (DHT, sRGB, 8-bits, Camera White, Auto White)
* - 8: I = 11, C = 1, B = 1, W = 1, A = 1, H = 0 (DHT, sRGB, 16-bits, Camera White, Auto White)
* - 9: I = 11, C = 2, B = 1, W = 1, A = 1, H = 0 (DHT, Adobe, 16-bits, Camera White, Auto White)
* - 10: I = 11, C = 4, B = 1, W = 1, A = 1, H = 0 (DHT, ProPhoto, 16-bits, Camera White, Auto White)
* - 11: reserved
* - 12: reserved
* - 13: reserved
* - 14: reserved
* - 15: reserved
* I: interpolation quality (0 - linear, 1 - VNG, 2 - PPG, 3 - AHD, 4 - DCB, 11 - DHT, 12 - AAHD)
* C: output colorspace (0 - raw, 1 - sRGB, 2 - Adobe, 3 - Wide, 4 - ProPhoto, 5 - XYZ, 6 - ACES, 7 - DCI-P3, 8 - Rec2020)
* W: use camera white balace (0 - off, 1 - on)
* A: use auto white balance (0 - off, 1 - on)
* B: output bit per sample (0 - 8-bits, 1 - 16-bits)
* H: half size image (0 - off, 1 - on)
* E: DCB color enhance (0 - off, 1 - on)
* N: FBDD noise reduction (0 - off, 1 - light, 2 - full)
* F: Interpolate RGGB as four colors (0 - off, 1 - on)
* S: Don't stretch or rotate raw pixels (0 - rotate and stretch, 1 - don't rotate and stretch)
*
* @note It is safe to set both W and A: W is used if camera white balance is found, otherwise A is used.
*/
qint32 m_quality;
};
class RAWPlugin : public QImageIOPlugin
{
Q_OBJECT
Q_PLUGIN_METADATA(IID "org.qt-project.Qt.QImageIOHandlerFactoryInterface" FILE "raw.json")
public:
Capabilities capabilities(QIODevice *device, const QByteArray &format) const override;
QImageIOHandler *create(QIODevice *device, const QByteArray &format = QByteArray()) const override;
};
#endif // KIMG_RAW_P_H