tiff.c

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/*
    This file is part of darktable,
    Copyright (C) 2010-2011, 2014 Henrik Andersson.
    Copyright (C) 2010-2011 johannes hanika.
    Copyright (C) 2011, 2013-2014 Pascal de Bruijn.
    Copyright (C) 2011-2020 Tobias Ellinghaus.
    Copyright (C) 2011 Togan Muftuoglu.
    Copyright (C) 2012 James C. McPherson.
    Copyright (C) 2012-2015, 2020-2021 Pascal Obry.
    Copyright (C) 2012 Richard Wonka.
    Copyright (C) 2012 Simon Spannagel.
    Copyright (C) 2013 Jérémy Rosen.
    Copyright (C) 2013 Thomas Pryds.
    Copyright (C) 2013-2014 Ulrich Pegelow.
    Copyright (C) 2014 Edouard Gomez.
    Copyright (C) 2014, 2016 Roman Lebedev.
    Copyright (C) 2017 luzpaz.
    Copyright (C) 2018 Simon Raffeiner.
    Copyright (C) 2019, 2022, 2025-2026 Aurélien PIERRE.
    Copyright (C) 2019 Sam Smith.
    Copyright (C) 2020 Diederik Ter Rahe.
    Copyright (C) 2020 Hanno Schwalm.
    Copyright (C) 2020-2021 Hubert Kowalski.
    Copyright (C) 2020-2022 Miloš Komarčević.
    Copyright (C) 2020-2021 Ralf Brown.
    Copyright (C) 2022 Martin Bařinka.
    
    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/>.
*/
#include "bauhaus/bauhaus.h"
#include "common/colorspaces.h"
#include "common/darktable.h"
#include "common/exif.h"
#include "common/imageio.h"
#include "common/imageio_module.h"
#include "common/math.h"
#include "control/conf.h"
#include "control/control.h"
#include "imageio/format/imageio_format_api.h"
#include "develop/pixelpipe_hb.h"
#include <inttypes.h>
#include <memory.h>
#include <stddef.h>
#include <stdio.h>
#include <stdlib.h>
#include <tiffio.h>
 
// it would be nice to save space by storing the masks as single channel float data,
// but at least GIMP can't open TIFF files where not all layers have the same format.
#define MASKS_USE_SAME_FORMAT
 
DT_MODULE(3)
 
typedef struct dt_imageio_tiff_t
{
  dt_imageio_module_data_t global;
  int bpp;
  int compress;
  int compresslevel;
  int shortfile;
  TIFF *handle;
} dt_imageio_tiff_t;
 
typedef struct dt_imageio_tiff_gui_t
{
  GtkWidget *bpp;
  GtkWidget *compress;
  GtkWidget *compresslevel;
  GtkWidget *shortfiles;
} dt_imageio_tiff_gui_t;
 
 
int write_image(dt_imageio_module_data_t *d_tmp, const char *filename, const void *in_void,
                dt_colorspaces_color_profile_type_t over_type, const char *over_filename,
                void *exif, int exif_len, int32_t imgid, int num, int total, dt_dev_pixelpipe_t *pipe,
                const gboolean export_masks)
{
  const dt_imageio_tiff_t *d = (dt_imageio_tiff_t *)d_tmp;
 
  uint8_t *profile = NULL;
  uint32_t profile_len = 0;
 
  TIFF *tif = NULL;
 
  void *rowdata = NULL;
 
  gboolean free_mask = FALSE;
  float *raster_mask = NULL;
#ifdef _WIN32
  wchar_t *wfilename = g_utf8_to_utf16(filename, -1, NULL, NULL, NULL);
#endif
  int rc = 1; // default to error
 
  if(imgid > 0)
  {
    cmsHPROFILE out_profile = dt_colorspaces_get_output_profile(imgid, &over_type, over_filename)->profile;
    cmsSaveProfileToMem(out_profile, 0, &profile_len);
    if(profile_len > 0)
    {
      profile = malloc(profile_len);
      if(IS_NULL_PTR(profile))
      {
        rc = 1;
        goto exit;
      }
      cmsSaveProfileToMem(out_profile, profile, &profile_len);
    }
  }
 
  uint16_t n_pages = 1;
  // only when masks are to be stored we check for extra pages!
  if(export_masks && pipe)
  {
    for(GList *iter = pipe->nodes; iter; iter = g_list_next(iter))
    {
      const dt_dev_pixelpipe_iop_t *piece = (dt_dev_pixelpipe_iop_t *)iter->data;
      if(piece->enabled)
        n_pages += g_hash_table_size(piece->module->raster_mask.source.masks);
    }
  }
 
  // Create little endian tiff image
#ifdef _WIN32
  tif = TIFFOpenW(wfilename, "wl");
#else
  tif = TIFFOpen(filename, "wl");
#endif
 
  if(IS_NULL_PTR(tif))
  {
    rc = 1;
    goto exit;
  }
 
  if(n_pages > 1)
  {
    TIFFSetField(tif, TIFFTAG_SUBFILETYPE, FILETYPE_PAGE);
    TIFFSetField(tif, TIFFTAG_PAGENAME, _("image"));
    TIFFSetField(tif, TIFFTAG_PAGENUMBER, 0, n_pages);
  }
  else
    TIFFSetField(tif, TIFFTAG_SUBFILETYPE, 0);
 
  TIFFSetField(tif, TIFFTAG_DOCUMENTNAME, filename);
 
  // http://partners.adobe.com/public/developer/en/tiff/TIFFphotoshop.pdf (dated 2002)
  // "A proprietary ZIP/Flate compression code (0x80b2) has been used by some"
  // "software vendors. This code should be considered obsolete. We recommend"
  // "that TIFF implementations recognize and read the obsolete code but only"
  // "write the official compression code (0x0008)."
  // http://www.awaresystems.be/imaging/tiff/tifftags/compression.html
  // http://www.awaresystems.be/imaging/tiff/tifftags/predictor.html
  if(d->compress == 1)
  {
    TIFFSetField(tif, TIFFTAG_COMPRESSION, COMPRESSION_ADOBE_DEFLATE);
    TIFFSetField(tif, TIFFTAG_PREDICTOR, PREDICTOR_NONE);
    TIFFSetField(tif, TIFFTAG_ZIPQUALITY, (uint16_t)d->compresslevel);
  }
  else if(d->compress == 2)
  {
    TIFFSetField(tif, TIFFTAG_COMPRESSION, COMPRESSION_ADOBE_DEFLATE);
    if(d->bpp == 32)
      TIFFSetField(tif, TIFFTAG_PREDICTOR, PREDICTOR_FLOATINGPOINT);
    else
      TIFFSetField(tif, TIFFTAG_PREDICTOR, PREDICTOR_HORIZONTAL);
    TIFFSetField(tif, TIFFTAG_ZIPQUALITY, (uint16_t)d->compresslevel);
  }
 
  if(!IS_NULL_PTR(profile))
  {
    TIFFSetField(tif, TIFFTAG_ICCPROFILE, (uint32_t)profile_len, profile);
  }
 
/* Howto check for a grayscale image?
   We test every pixel for differences between the rgb channels using specific thresholds
   for every precision. If there is such a pixel we keep it as an rgb image, otherwise
   it's safe to assume a grayscale.
   As there might be pipeline errors at the border we leave them alone.
   After these checks layers can be used later on.
*/
  uint16_t layers = 3;  // default are rgb images
 
  int shortmode = 0;
  if(dt_conf_key_exists("plugins/imageio/format/tiff/shortfile"))
    shortmode = dt_conf_get_int("plugins/imageio/format/tiff/shortfile");
 
  if((d->global.height > 4) && (d->global.width > 4) && shortmode)
  {
    layers = 1;    // let's now assume a grayscale
    if(d->bpp == 32)
    {
      for(int y = 1; y < d->global.height-1; y++)
      {
        float *in = (float *)in_void + (size_t)4 * y * d->global.width;
        for(int x = 1; x < d->global.width-1; x++, in += 4)
        {
          if((fabsf(fmaxf(in[0], 0.001f) / fmaxf(in[1], 0.001f)) > 1.01f) ||
             (fabsf(fmaxf(in[0], 0.001f) / fmaxf(in[2], 0.001f)) > 1.01f) ||
             (fabsf(fmaxf(in[1], 0.001f) / fmaxf(in[2], 0.001f)) > 1.01f))
          {
            layers = 3;
            goto checkdone;
          }
        }
      }
    }
    else if(d->bpp == 16)
    {
      for(int y = 1; y < d->global.height-1; y++)
      {
        uint16_t *in = (uint16_t *)in_void + (size_t)4 * y * d->global.width;
        for(int x = 1; x < d->global.width-1; x++, in += 4)
        {
          if((abs(in[0] - in[1]) > 100) ||
             (abs(in[0] - in[2]) > 100) ||
             (abs(in[1] - in[2]) > 100))
          {
            layers = 3;
            goto checkdone;
          }
        }
      }
    }
    else
    {
      for(int y = 1; y < d->global.height-1; y++)
      {
        uint8_t *in = (uint8_t *)in_void + (size_t)4 * y * d->global.width;
        for(int x = 1; x < d->global.width-1; x++, in += 4)
        {
          if((abs(in[0] - in[1]) > 5) ||
             (abs(in[0] - in[2]) > 5) ||
             (abs(in[1] - in[2]) > 5))
          {
            layers = 3;
            goto checkdone;
          }
        }
      }
    }
 
  }
  checkdone:
  if(layers == 1)
    dt_control_log(_("will export as a grayscale image"));
 
  TIFFSetField(tif, TIFFTAG_SAMPLESPERPIXEL, layers);
  TIFFSetField(tif, TIFFTAG_BITSPERSAMPLE, (uint16_t)d->bpp);
  TIFFSetField(tif, TIFFTAG_SAMPLEFORMAT, (d->bpp == 32) ? SAMPLEFORMAT_IEEEFP : SAMPLEFORMAT_UINT);
  TIFFSetField(tif, TIFFTAG_IMAGEWIDTH, (uint32_t)d->global.width);
  TIFFSetField(tif, TIFFTAG_IMAGELENGTH, (uint32_t)d->global.height);
  if(layers == 3)
    TIFFSetField(tif, TIFFTAG_PHOTOMETRIC, PHOTOMETRIC_RGB);
  else
    TIFFSetField(tif, TIFFTAG_PHOTOMETRIC, PHOTOMETRIC_MINISBLACK);
 
  TIFFSetField(tif, TIFFTAG_PLANARCONFIG, PLANARCONFIG_CONTIG);
  TIFFSetField(tif, TIFFTAG_ORIENTATION, ORIENTATION_TOPLEFT);
  TIFFSetField(tif, TIFFTAG_ROWSPERSTRIP, TIFFDefaultStripSize(tif, 0));
 
  const int resolution = dt_conf_get_int("metadata/resolution");
  TIFFSetField(tif, TIFFTAG_XRESOLUTION, (float)resolution);
  TIFFSetField(tif, TIFFTAG_YRESOLUTION, (float)resolution);
  TIFFSetField(tif, TIFFTAG_RESOLUTIONUNIT, RESUNIT_INCH);
 
  const size_t rowsize = (d->global.width * layers) * d->bpp / 8;
  if((rowdata = malloc(rowsize)) == NULL)
  {
    rc = 1;
    goto exit;
  }
 
  if(d->bpp == 32)
  {
    for(int y = 0; y < d->global.height; y++)
    {
      float *in = (float *)in_void + (size_t)4 * y * d->global.width;
      float *out = (float *)rowdata;
 
      for(int x = 0; x < d->global.width; x++, in += 4, out += layers)
      {
        memcpy(out, in, sizeof(float) * layers);
      }
 
      if(TIFFWriteScanline(tif, rowdata, y, 0) == -1)
      {
        rc = 1;
        goto exit;
      }
    }
  }
  else if(d->bpp == 16)
  {
    for(int y = 0; y < d->global.height; y++)
    {
      uint16_t *in = (uint16_t *)in_void + (size_t)4 * y * d->global.width;
      uint16_t *out = (uint16_t *)rowdata;
 
      for(int x = 0; x < d->global.width; x++, in += 4, out += layers)
      {
        memcpy(out, in, sizeof(uint16_t) * layers);
      }
 
      if(TIFFWriteScanline(tif, rowdata, y, 0) == -1)
      {
        rc = 1;
        goto exit;
      }
    }
  }
  else
  {
    for(int y = 0; y < d->global.height; y++)
    {
      uint8_t *in = (uint8_t *)in_void + (size_t)4 * y * d->global.width;
      uint8_t *out = (uint8_t *)rowdata;
 
      for(int x = 0; x < d->global.width; x++, in += 4, out += layers)
      {
        memcpy(out, in, sizeof(uint8_t) * layers);
      }
 
      if(TIFFWriteScanline(tif, rowdata, y, 0) == -1)
      {
        rc = 1;
        goto exit;
      }
    }
  }
 
  rc = 0;
 
  // close the file before adding exif data
  if(tif)
  {
    TIFFClose(tif);
    tif = NULL;
  }
  if(exif)
  {
    rc = dt_exif_write_blob(exif, exif_len, filename, d->compress > 0);
    // Until we get symbolic error status codes, if rc is 1, return 0
    rc = (rc == 1) ? 0 : 1;
  }
 
  // exiv2 doesn't support multi page tiffs. so we have to write in two steps. :-(
 
  if(rc == 0 && n_pages > 1)
  {
#ifdef _WIN32
    tif = TIFFOpenW(wfilename, "al");
#else
    tif = TIFFOpen(filename, "al");
#endif
 
    if(IS_NULL_PTR(tif))
    {
      rc = 1;
      goto exit;
    }
 
    // add masks
    float missing_raster_mask[8 * 8] = { 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0,
                                         0.0, 0.0, 1.0, 1.0, 1.0, 1.0, 0.0, 0.0,
                                         0.0, 1.0, 0.0, 1.0, 1.0, 0.0, 1.0, 0.0,
                                         0.0, 1.0, 1.0, 1.0, 1.0, 1.0, 1.0, 0.0,
                                         0.0, 0.0, 1.0, 0.0, 0.0, 1.0, 0.0, 0.0,
                                         0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0,
                                         0.0, 0.0, 1.0, 1.0, 1.0, 1.0, 0.0, 0.0,
                                         0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0 };
    static const size_t missing_raster_mask_w = 8, missing_raster_mask_h = 8;
    uint16_t page = 1;
    for(GList *iter = pipe->nodes; iter; iter = g_list_next(iter))
    {
      dt_dev_pixelpipe_iop_t *piece = (dt_dev_pixelpipe_iop_t *)iter->data;
 
      GHashTableIter rm_iter;
      gpointer key, value;
 
      // The global cache remains authoritative even when the provider image was
      // an exact hit and this pipeline node did not run locally.
      g_hash_table_iter_init(&rm_iter, piece->module->raster_mask.source.masks);
      while(g_hash_table_iter_next(&rm_iter, &key, &value))
      {
        if(free_mask) dt_pixelpipe_cache_free_align(raster_mask);
        raster_mask = dt_dev_get_raster_mask(pipe, piece->module, GPOINTER_TO_INT(key), NULL, NULL);
        free_mask = !IS_NULL_PTR(raster_mask);
 
 
        size_t w = d->global.width, h = d->global.height;
        if(IS_NULL_PTR(raster_mask))
        {
          // this should never happen
          w = missing_raster_mask_w;
          h = missing_raster_mask_h;
          raster_mask = missing_raster_mask;
          free_mask = FALSE;
        }
 
        TIFFSetField(tif, TIFFTAG_SUBFILETYPE, FILETYPE_PAGE);
        TIFFSetField(tif, TIFFTAG_PAGENUMBER, page, n_pages);
 
        const char *pagename = g_hash_table_lookup(piece->module->raster_mask.source.masks, key);
        if(pagename)
          TIFFSetField(tif, TIFFTAG_PAGENAME, pagename);
        else
          TIFFSetField(tif, TIFFTAG_PAGENAME, piece->module->name());
 
        if(d->compress == 1)
        {
          TIFFSetField(tif, TIFFTAG_COMPRESSION, COMPRESSION_ADOBE_DEFLATE);
          TIFFSetField(tif, TIFFTAG_PREDICTOR, PREDICTOR_NONE);
          TIFFSetField(tif, TIFFTAG_ZIPQUALITY, (uint16_t)d->compresslevel);
        }
        else if(d->compress == 2)
        {
          TIFFSetField(tif, TIFFTAG_COMPRESSION, COMPRESSION_ADOBE_DEFLATE);
          if(d->bpp == 32)
            TIFFSetField(tif, TIFFTAG_PREDICTOR, PREDICTOR_FLOATINGPOINT);
          else
            TIFFSetField(tif, TIFFTAG_PREDICTOR, PREDICTOR_HORIZONTAL);
          TIFFSetField(tif, TIFFTAG_ZIPQUALITY, (uint16_t)d->compresslevel);
        }
 
        TIFFSetField(tif, TIFFTAG_XRESOLUTION, (float)resolution);
        TIFFSetField(tif, TIFFTAG_YRESOLUTION, (float)resolution);
        TIFFSetField(tif, TIFFTAG_RESOLUTIONUNIT, RESUNIT_INCH);
 
        TIFFSetField(tif, TIFFTAG_IMAGEWIDTH, (uint32_t)w);
        TIFFSetField(tif, TIFFTAG_IMAGELENGTH, (uint32_t)h);
        TIFFSetField(tif, TIFFTAG_PLANARCONFIG, PLANARCONFIG_CONTIG);
        TIFFSetField(tif, TIFFTAG_ORIENTATION, ORIENTATION_TOPLEFT);
 
#ifdef MASKS_USE_SAME_FORMAT
        TIFFSetField(tif, TIFFTAG_SAMPLESPERPIXEL, layers);
        TIFFSetField(tif, TIFFTAG_BITSPERSAMPLE, (uint16_t)d->bpp);
        TIFFSetField(tif, TIFFTAG_SAMPLEFORMAT, (d->bpp == 32) ? SAMPLEFORMAT_IEEEFP : SAMPLEFORMAT_UINT);
        if(layers == 3)
          TIFFSetField(tif, TIFFTAG_PHOTOMETRIC, PHOTOMETRIC_RGB);
        else
          TIFFSetField(tif, TIFFTAG_PHOTOMETRIC, PHOTOMETRIC_MINISBLACK);
        TIFFSetField(tif, TIFFTAG_ROWSPERSTRIP, TIFFDefaultStripSize(tif, 0));
 
        if(w != d->global.width)
        {
          dt_free(rowdata);
          const size_t _rowsize = (w * layers) * d->bpp / 8;
          rowdata = malloc(_rowsize);
        }
 
        if(d->bpp == 32)
        {
          for(int y = 0; y < h; y++)
          {
            const float *in = raster_mask + (size_t)y * w;
            float *out = (float *)rowdata;
 
            for(int x = 0; x < w; x++, out += layers)
            {
              for(int c = 0; c < layers; c++)
                out[c] = in[x];
            }
 
            if(TIFFWriteScanline(tif, rowdata, y, 0) == -1)
            {
              rc = 1;
              goto exit;
            }
          }
        }
        else if(d->bpp == 16)
        {
          for(int y = 0; y < h; y++)
          {
            const float *in = raster_mask + (size_t)y * w;
            uint16_t *out = (uint16_t *)rowdata;
 
            for(int x = 0; x < w; x++, out += layers)
            {
              for(int c = 0; c < layers; c++)
                out[c] = CLIP(in[x]) * 65535.0f + 0.5f;
            }
 
            if(TIFFWriteScanline(tif, rowdata, y, 0) == -1)
            {
              rc = 1;
              goto exit;
            }
          }
        }
        else
        {
          for(int y = 0; y < h; y++)
          {
            const float *in = raster_mask + (size_t)y * w;
            uint8_t *out = (uint8_t *)rowdata;
 
            for(int x = 0; x < w; x++, out += layers)
            {
              for(int c = 0; c < layers; c++)
                out[c] = CLIP(in[x]) * 255.0f + 0.5f;
            }
 
            if(TIFFWriteScanline(tif, rowdata, y, 0) == -1)
            {
              rc = 1;
              goto exit;
            }
          }
        }
#else // MASKS_USE_SAME_FORMAT
        TIFFSetField(tif, TIFFTAG_SAMPLESPERPIXEL, 1);
        TIFFSetField(tif, TIFFTAG_BITSPERSAMPLE, 32);
        TIFFSetField(tif, TIFFTAG_SAMPLEFORMAT, SAMPLEFORMAT_IEEEFP);
        if(d->compress == 2) // override predictor set above assuming MASKS_USE_SAME_FORMAT
            TIFFSetField(tif, TIFFTAG_PREDICTOR, PREDICTOR_FLOATINGPOINT);
        TIFFSetField(tif, TIFFTAG_PHOTOMETRIC, PHOTOMETRIC_MINISBLACK);
        TIFFSetField(tif, TIFFTAG_ROWSPERSTRIP, TIFFDefaultStripSize(tif, 0));
 
        for(int y = 0; y < h; y++)
        {
          const float *in = raster_mask + (size_t)y * w;
          if(TIFFWriteScanline(tif, (void *)in, y, 0) == -1)
          {
            rc = 1;
            goto exit;
          }
        }
#endif // MASKS_USE_SAME_FORMAT
 
        page++;
 
        if(page < n_pages)
        {
          TIFFWriteDirectory(tif);
        }
      } // for all raster masks
    } // for all pipe nodes
 
    // success
    rc = 0;
  } // if more than 1 page, i.e., there are masks
 
exit:
  if(tif)
  {
    TIFFClose(tif);
    tif = NULL;
  }
  dt_free(profile);
  dt_free(rowdata);
#ifdef _WIN32
  dt_free(wfilename);
#endif
  if(free_mask)
    dt_pixelpipe_cache_free_align(raster_mask);
 
  return rc;
}
 
#if 0
int dt_imageio_tiff_read_header(const char *filename, dt_imageio_tiff_t *tiff)
{
  tiff->handle = TIFFOpen(filename, "rl");
  if( tiff->handle )
  {
    TIFFGetField(tiff->handle, TIFFTAG_IMAGEWIDTH, &tiff->width);
    TIFFGetField(tiff->handle, TIFFTAG_IMAGELENGTH, &tiff->height);
  }
  return 1;
}
 
int dt_imageio_tiff_read(dt_imageio_tiff_t *tiff, uint8_t *out)
{
  TIFFClose(tiff->handle);
  return 1;
}
#endif
 
size_t params_size(dt_imageio_module_format_t *self)
{
  return sizeof(dt_imageio_tiff_t) - sizeof(TIFF *);
}
 
void *legacy_params(dt_imageio_module_format_t *self, const void *const old_params,
                    const size_t old_params_size, const int old_version, const int new_version,
                    size_t *new_size)
{
  if(old_version == 1 && new_version == 3)
  {
    typedef struct dt_imageio_tiff_v1_t
    {
      int max_width, max_height;
      int width, height;
      char style[128];
      int bpp;
      int compress;
      TIFF *handle;
    } dt_imageio_tiff_v1_t;
 
    const dt_imageio_tiff_v1_t *o = (dt_imageio_tiff_v1_t *)old_params;
    dt_imageio_tiff_t *n = (dt_imageio_tiff_t *)calloc(1, sizeof(dt_imageio_tiff_t));
 
    n->global.max_width = o->max_width;
    n->global.max_height = o->max_height;
    n->global.width = o->width;
    n->global.height = o->height;
    g_strlcpy(n->global.style, o->style, sizeof(o->style));
    n->bpp = o->bpp;
    n->compress = o->compress == 3 ? 2 : o->compress;  // drop redundant float case
    n->compresslevel = 6;
    n->handle = o->handle;
    *new_size = self->params_size(self);
    return n;
  }
  else if(old_version == 2 && new_version == 3)
  {
    typedef struct dt_imageio_tiff_v2_t
    {
      int max_width, max_height;
      int width, height;
      char style[128];
      gboolean style_append;
      int bpp;
      int compress;
      TIFF *handle;
    } dt_imageio_tiff_v2_t;
 
    const dt_imageio_tiff_v2_t *o = (dt_imageio_tiff_v2_t *)old_params;
    dt_imageio_tiff_t *n = (dt_imageio_tiff_t *)calloc(1, sizeof(dt_imageio_tiff_t));
 
    n->global.max_width = o->max_width;
    n->global.max_height = o->max_height;
    n->global.width = o->width;
    n->global.height = o->height;
    g_strlcpy(n->global.style, o->style, sizeof(o->style));
    n->bpp = o->bpp;
    n->compress = o->compress == 3 ? 2 : o->compress;  // drop redundant float case
    n->compresslevel = 6;
    n->handle = o->handle;
    *new_size = self->params_size(self);
    return n;
  }
  return NULL;
}
 
void *get_params(dt_imageio_module_format_t *self)
{
  dt_imageio_tiff_t *d = (dt_imageio_tiff_t *)calloc(1, sizeof(dt_imageio_tiff_t));
  d->bpp = dt_conf_get_int("plugins/imageio/format/tiff/bpp");
  if(d->bpp != 16 && d->bpp != 32)
    d->bpp = 8;
 
  // Drop redundant float case from existing config
  // TODO: Move to legacy eventually
  d->compress = dt_conf_get_int("plugins/imageio/format/tiff/compress");
  if(d->compress == 3)
  {
    d->compress = 2;
    dt_conf_set_int("plugins/imageio/format/tiff/compress", d->compress);
  }
 
  // TIFF compression level might actually be zero, handle this
  if(!dt_conf_key_exists("plugins/imageio/format/tiff/compresslevel"))
    d->compresslevel = 6;
  else
  {
    d->compresslevel = dt_conf_get_int("plugins/imageio/format/tiff/compresslevel");
    if(d->compresslevel < 0 || d->compresslevel > 9) d->compresslevel = 6;
  }
 
  // TIFF shortfile
  if(!dt_conf_key_exists("plugins/imageio/format/tiff/shortfile"))
    d->shortfile = 0;
  else
  {
    d->shortfile = dt_conf_get_int("plugins/imageio/format/tiff/shortfile");
  }
 
  return d;
}
 
void free_params(dt_imageio_module_format_t *self, dt_imageio_module_data_t *params)
{
  dt_free(params);
}
 
int set_params(dt_imageio_module_format_t *self, const void *params, const int size)
{
  if(size != self->params_size(self)) return 1;
  const dt_imageio_tiff_t *d = (dt_imageio_tiff_t *)params;
  const dt_imageio_tiff_gui_t *g = (dt_imageio_tiff_gui_t *)self->gui_data;
 
  if(d->bpp == 16)
    dt_bauhaus_combobox_set(g->bpp, 1);
  else if(d->bpp == 32)
    dt_bauhaus_combobox_set(g->bpp, 2);
  else // (d->bpp == 8)
    dt_bauhaus_combobox_set(g->bpp, 0);
 
  dt_bauhaus_combobox_set(g->compress, d->compress);
 
  dt_bauhaus_slider_set(g->compresslevel, d->compresslevel);
 
  dt_bauhaus_combobox_set(g->shortfiles, d->shortfile);
  return 0;
}
 
int bpp(dt_imageio_module_data_t *p)
{
  return ((dt_imageio_tiff_t *)p)->bpp;
}
 
int levels(dt_imageio_module_data_t *p)
{
  int ret = IMAGEIO_RGB;
 
  if(((dt_imageio_tiff_t *)p)->bpp == 8)
    ret |= IMAGEIO_INT8;
  else if(((dt_imageio_tiff_t *)p)->bpp == 16)
    ret |= IMAGEIO_INT16;
  else if(((dt_imageio_tiff_t *)p)->bpp == 32)
    ret |= IMAGEIO_FLOAT;
 
  return ret;
}
 
const char *mime(dt_imageio_module_data_t *data)
{
  return "image/tiff";
}
 
const char *extension(dt_imageio_module_data_t *data)
{
  return "tif";
}
 
const char *name()
{
  return _("TIFF (8/16/32-bit)");
}
 
static void bpp_combobox_changed(GtkWidget *widget, gpointer user_data)
{
  const int bpp = dt_bauhaus_combobox_get(widget);
 
  if(bpp == 1)
    dt_conf_set_int("plugins/imageio/format/tiff/bpp", 16);
  else if(bpp == 2)
    dt_conf_set_int("plugins/imageio/format/tiff/bpp", 32);
  else // (bpp == 0)
    dt_conf_set_int("plugins/imageio/format/tiff/bpp", 8);
}
 
static void shortfile_combobox_changed(GtkWidget *widget, gpointer user_data)
{
  const int mode = dt_bauhaus_combobox_get(widget);
  dt_conf_set_int("plugins/imageio/format/tiff/shortfile", mode);
}
 
static void compress_combobox_changed(GtkWidget *widget, gpointer user_data)
{
  const int compress = dt_bauhaus_combobox_get(widget);
  dt_conf_set_int("plugins/imageio/format/tiff/compress", compress);
 
  if(compress == 0)
    gtk_widget_set_sensitive(GTK_WIDGET(user_data), FALSE);
  else
    gtk_widget_set_sensitive(GTK_WIDGET(user_data), TRUE);
 
}
 
static void compress_level_changed(GtkWidget *slider, gpointer user_data)
{
  const int compresslevel = (int)dt_bauhaus_slider_get(slider);
  dt_conf_set_int("plugins/imageio/format/tiff/compresslevel", compresslevel);
}
 
void init(dt_imageio_module_format_t *self)
{
}
 
void cleanup(dt_imageio_module_format_t *self)
{
}
 
void gui_init(dt_imageio_module_format_t *self)
{
  dt_imageio_tiff_gui_t *gui = (dt_imageio_tiff_gui_t *)malloc(sizeof(dt_imageio_tiff_gui_t));
  self->gui_data = (void *)gui;
 
  const int bpp = dt_conf_get_int("plugins/imageio/format/tiff/bpp");
 
  // Drop redundant float case from existing config
  // TODO: Move to legacy eventually
  int compress = dt_conf_get_int("plugins/imageio/format/tiff/compress");
  if(compress == 3)
  {
    compress = 2;
    dt_conf_set_int("plugins/imageio/format/tiff/compress", compress);
  }
 
  int shortmode = 0;
  if(dt_conf_key_exists("plugins/imageio/format/tiff/shortfile"))
    shortmode = dt_conf_get_int("plugins/imageio/format/tiff/shortfile");
 
  // TIFF compression level might actually be zero!
  int compresslevel = 6;
  if(dt_conf_key_exists("plugins/imageio/format/tiff/compresslevel"))
    compresslevel = dt_conf_get_int("plugins/imageio/format/tiff/compresslevel");
 
  self->widget = gtk_box_new(GTK_ORIENTATION_VERTICAL, DT_GUI_BOX_SPACING);
 
  // Bit depth combo box
  gui->bpp = dt_bauhaus_combobox_new(darktable.bauhaus, DT_GUI_MODULE(NULL));
  dt_bauhaus_widget_set_label(gui->bpp, N_("bit depth"));
  dt_bauhaus_combobox_add(gui->bpp, _("8 bit"));
  dt_bauhaus_combobox_add(gui->bpp, _("16 bit"));
  dt_bauhaus_combobox_add(gui->bpp, _("32 bit (float)"));
  if(bpp == 16)
    dt_bauhaus_combobox_set(gui->bpp, 1);
  else if(bpp == 32)
    dt_bauhaus_combobox_set(gui->bpp, 2);
  else // (bpp == 8)
    dt_bauhaus_combobox_set(gui->bpp, 0);
  gtk_box_pack_start(GTK_BOX(self->widget), gui->bpp, TRUE, TRUE, 0);
  g_signal_connect(G_OBJECT(gui->bpp), "value-changed", G_CALLBACK(bpp_combobox_changed), NULL);
 
  // Compression method combo box
  gui->compress = dt_bauhaus_combobox_new(darktable.bauhaus, DT_GUI_MODULE(NULL));
  dt_bauhaus_widget_set_label(gui->compress, N_("compression"));
  dt_bauhaus_combobox_add(gui->compress, _("uncompressed"));
  dt_bauhaus_combobox_add(gui->compress, _("deflate"));
  dt_bauhaus_combobox_add(gui->compress, _("deflate with predictor"));
  dt_bauhaus_combobox_set(gui->compress, compress);
  gtk_box_pack_start(GTK_BOX(self->widget), gui->compress, TRUE, TRUE, 0);
 
  // Compression level slider
  gui->compresslevel = dt_bauhaus_slider_new_with_range(darktable.bauhaus, DT_GUI_MODULE(NULL),
                                                      dt_confgen_get_int("plugins/imageio/format/tiff/compresslevel", DT_MIN),
                                                      dt_confgen_get_int("plugins/imageio/format/tiff/compresslevel", DT_MAX),
                                                      1,
                                                      dt_confgen_get_int("plugins/imageio/format/tiff/compresslevel", DT_DEFAULT),
                                                      0);
  dt_bauhaus_widget_set_label(gui->compresslevel, N_("compression level"));
  dt_bauhaus_slider_set(gui->compresslevel, compresslevel);
  gtk_box_pack_start(GTK_BOX(self->widget), GTK_WIDGET(gui->compresslevel), TRUE, TRUE, 0);
  g_signal_connect(G_OBJECT(gui->compresslevel), "value-changed", G_CALLBACK(compress_level_changed), NULL);
 
  g_signal_connect(G_OBJECT(gui->compress), "value-changed", G_CALLBACK(compress_combobox_changed), (gpointer)gui->compresslevel);
 
  if(compress == 0)
    gtk_widget_set_sensitive(gui->compresslevel, FALSE);
 
  // shortfile option combo box
  gui->shortfiles = dt_bauhaus_combobox_new(darktable.bauhaus, DT_GUI_MODULE(NULL));
  dt_bauhaus_widget_set_label(gui->shortfiles, N_("b&w image"));
  dt_bauhaus_combobox_add(gui->shortfiles, _("write rgb colors"));
  dt_bauhaus_combobox_add(gui->shortfiles, _("write grayscale"));
  dt_bauhaus_combobox_set(gui->shortfiles, shortmode);
  gtk_box_pack_start(GTK_BOX(self->widget), gui->shortfiles, TRUE, TRUE, 0);
  g_signal_connect(G_OBJECT(gui->shortfiles), "value-changed", G_CALLBACK(shortfile_combobox_changed), NULL);
}
 
void gui_cleanup(dt_imageio_module_format_t *self)
{
  dt_free(self->gui_data);
}
 
void gui_reset(dt_imageio_module_format_t *self)
{
  dt_imageio_tiff_gui_t *gui = (dt_imageio_tiff_gui_t *)self->gui_data;
  dt_bauhaus_combobox_set(gui->bpp, 0); //8bpp
  dt_bauhaus_slider_set(gui->compresslevel, dt_confgen_get_int("plugins/imageio/format/tiff/compresslevel", DT_DEFAULT));
  dt_bauhaus_combobox_set(gui->shortfiles, dt_confgen_get_int("plugins/imageio/format/tiff/shortfile", DT_DEFAULT));
}
 
int flags(dt_imageio_module_data_t *data)
{
  return FORMAT_FLAGS_SUPPORT_XMP | FORMAT_FLAGS_SUPPORT_LAYERS;
}
 
// clang-format off
// modelines: These editor modelines have been set for all relevant files by tools/update_modelines.py
// vim: shiftwidth=2 expandtab tabstop=2 cindent
// kate: tab-indents: off; indent-width 2; replace-tabs on; indent-mode cstyle; remove-trailing-spaces modified;
// clang-format on