imageio_core.h

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/*
    This file is part of darktable,
    Copyright (C) 2009-2014 johannes hanika.
    Copyright (C) 2011-2012, 2014-2017, 2019-2020 Tobias Ellinghaus.
    Copyright (C) 2012 Richard Wonka.
    Copyright (C) 2012-2014 Ulrich Pegelow.
    Copyright (C) 2014 Jérémy Rosen.
    Copyright (C) 2014-2016 Pedro Côrte-Real.
    Copyright (C) 2014, 2016 Roman Lebedev.
    Copyright (C) 2019 Philippe Weyland.
    Copyright (C) 2020 Hanno Schwalm.
    Copyright (C) 2020-2022 Pascal Obry.
    Copyright (C) 2021 Daniel Vogelbacher.
    Copyright (C) 2022 Aldric Renaudin.
    Copyright (C) 2022, 2025 Aurélien PIERRE.
    Copyright (C) 2022 Martin Bařinka.
    Copyright (C) 2025 Alynx Zhou.
    
    darktable is free software: you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
    the Free Software Foundation, either version 3 of the License, or
    (at your option) any later version.
    
    darktable is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    GNU General Public License for more details.
    
    You should have received a copy of the GNU General Public License
    along with darktable.  If not, see <http://www.gnu.org/licenses/>.
*/
 
#ifndef DT_IMAGEIO_IMAGEIO_CORE_H
#define DT_IMAGEIO_IMAGEIO_CORE_H
 
#include "system/atomic.h"
#include "common/image.h"
#include "imageio/imageio_module.h"
#include "caches/mipmap_cache.h"
#include <glib.h>
#include <stdio.h>
#include <inttypes.h>
 
#ifdef __cplusplus
extern "C" {
#endif
 
#define FILTERS_ARE_CYGM(filters)                                                                                 \
  ((filters) == 0xb4b4b4b4 || (filters) == 0x4b4b4b4b || (filters) == 0x1e1e1e1e || (filters) == 0xe1e1e1e1)
 
#define FILTERS_ARE_RGBE(filters)                                                                                 \
  ((filters) == 0x63636363 || (filters) == 0x36363636 || (filters) == 0x9c9c9c9c || (filters) == 0xc9c9c9c9)
 
// FIXME: kill this pls.
#define FILTERS_ARE_4BAYER(filters) (FILTERS_ARE_CYGM(filters) || FILTERS_ARE_RGBE(filters))
 
// for Adobe coefficients from LibRaw & RawSpeed
#define ADOBE_COEFF_FACTOR 10000
 
typedef enum dt_imageio_levels_t
{
  IMAGEIO_INT8 = 0x0,
  IMAGEIO_INT12 = 0x1,
  IMAGEIO_INT16 = 0x2,
  IMAGEIO_INT32 = 0x3,
  IMAGEIO_FLOAT = 0x4,
  IMAGEIO_BW = 0x5,
  IMAGEIO_PREC_MASK = 0xFF,
 
  IMAGEIO_RGB = 0x100,
  IMAGEIO_GRAY = 0x200,
  IMAGEIO_CHANNEL_MASK = 0xFF00
} dt_imageio_levels_t;
 
// Checks that the image is indeed an ldr image
gboolean dt_imageio_is_ldr(const char *filename);
// checks that the image has a monochrome preview attached
gboolean dt_imageio_has_mono_preview(const char *filename);
 
// opens the file using pfm, hdr, exr.
dt_imageio_retval_t dt_imageio_open_hdr(dt_image_t *img, const char *filename, dt_mipmap_buffer_t *buf);
// opens the file using jpeg, tiff, webp, png, j2k or pnm, in that order.
dt_imageio_retval_t dt_imageio_open_raster(dt_image_t *img, const char *filename, dt_mipmap_buffer_t *buf);
// try all the options in sequence
dt_imageio_retval_t dt_imageio_open(dt_image_t *img, const char *filename, dt_mipmap_buffer_t *buf);
 
dt_imageio_retval_t dt_imageio_open_standalone(dt_image_t *img, const char *filename,
                                               dt_mipmap_buffer_t *buf);
 
void dt_imageio_close_standalone(dt_mipmap_buffer_t *buf);
 
struct dt_imageio_module_format_t;
struct dt_imageio_module_data_t;
int dt_imageio_export(const int32_t imgid, const char *filename, struct dt_imageio_module_format_t *format,
                      struct dt_imageio_module_data_t *format_params, const double scale_factor,
                      const gboolean high_quality,
                      const gboolean copy_metadata, const gboolean export_masks,
                      dt_colorspaces_color_profile_type_t icc_type, const gchar *icc_filename,
                      dt_iop_color_intent_t icc_intent, dt_imageio_module_storage_t *storage,
                      dt_imageio_module_data_t *storage_params, int num, int total, dt_export_metadata_t *metadata);
 
int dt_imageio_export_with_flags(const int32_t imgid, const char *filename,
                                 struct dt_imageio_module_format_t *format,
                                 struct dt_imageio_module_data_t *format_params, const gboolean ignore_exif,
                                 const gboolean display_byteorder, const gboolean high_quality, const double scale_factor,
                                 const gboolean thumbnail_export, const char *filter, const gboolean copy_metadata,
                                 const gboolean export_masks, dt_colorspaces_color_profile_type_t icc_type,
                                 const gchar *icc_filename, dt_iop_color_intent_t icc_intent,
                                 dt_imageio_module_storage_t *storage, dt_imageio_module_data_t *storage_params,
                                 int num, int total, dt_export_metadata_t *metadata,
                                 dt_atomic_int *shutdown);
 
// general, efficient buffer flipping function using memcopies
void dt_imageio_flip_buffers(char *out, const char *in,
                             const size_t bpp, // bytes per pixel
                             const int wd, const int ht, const int fwd, const int fht, const int stride,
                             const dt_image_orientation_t orientation);
 
void dt_imageio_flip_buffers_ui8_to_float(float *out, const uint8_t *in, const float black, const float white,
                                          const int ch, const int wd, const int ht, const int fwd,
                                          const int fht, const int stride,
                                          const dt_image_orientation_t orientation);
 
int dt_imageio_large_thumbnail(const char *filename, uint8_t **buffer, int32_t *th_width, int32_t *th_height,
                               dt_colorspaces_color_profile_type_t *color_space, const int width,
                               const int height);
 
gboolean dt_imageio_crop_thumbnail(const dt_boundingbox_t box, uint8_t *const buffer,
                                   int32_t *width, int32_t *height);
 
// lookup maker and model, dispatch lookup to rawspeed or libraw
gboolean dt_imageio_lookup_makermodel(const char *maker, const char *model,
                                      char *mk, int mk_len, char *md, int md_len,
                                      char *al, int al_len);
 
 
#ifdef __cplusplus
}
#endif
 
#endif // DT_IMAGEIO_IMAGEIO_CORE_H
 
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