splittoning.c

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/*
    This file is part of darktable,
    Copyright (C) 2010 Alexandre Prokoudine.
    Copyright (C) 2010-2011 Bruce Guenter.
    Copyright (C) 2010-2011 Henrik Andersson.
    Copyright (C) 2010-2013, 2016 johannes hanika.
    Copyright (C) 2010 José Carlos García Sogo.
    Copyright (C) 2010 Milan Knížek.
    Copyright (C) 2010 Stuart Henderson.
    Copyright (C) 2011 Antony Dovgal.
    Copyright (C) 2011 Brian Teague.
    Copyright (C) 2011 Ger Siemerink.
    Copyright (C) 2011 Jérémy Rosen.
    Copyright (C) 2011 Olivier Tribout.
    Copyright (C) 2011 Pascal de Bruijn.
    Copyright (C) 2011 Robert Bieber.
    Copyright (C) 2011-2016, 2019 Tobias Ellinghaus.
    Copyright (C) 2012-2013 Edouard Gomez.
    Copyright (C) 2012 Richard Wonka.
    Copyright (C) 2012, 2014 Ulrich Pegelow.
    Copyright (C) 2013 Dennis Gnad.
    Copyright (C) 2013, 2018-2022 Pascal Obry.
    Copyright (C) 2013-2016 Roman Lebedev.
    Copyright (C) 2013 Simon Spannagel.
    Copyright (C) 2015 Pedro Côrte-Real.
    Copyright (C) 2017 Heiko Bauke.
    Copyright (C) 2017 luzpaz.
    Copyright (C) 2018-2020, 2022-2023, 2025-2026 Aurélien PIERRE.
    Copyright (C) 2018-2019 Edgardo Hoszowski.
    Copyright (C) 2018 Maurizio Paglia.
    Copyright (C) 2018 rawfiner.
    Copyright (C) 2019 Andreas Schneider.
    Copyright (C) 2019-2020, 2022 Diederik Ter Rahe.
    Copyright (C) 2019 Diederik ter Rahe.
    Copyright (C) 2019 Felipe Contreras.
    Copyright (C) 2019 mepi0011.
    Copyright (C) 2020 Aldric Renaudin.
    Copyright (C) 2020-2021 Chris Elston.
    Copyright (C) 2020 Hubert Kowalski.
    Copyright (C) 2020-2021 Ralf Brown.
    Copyright (C) 2021 Marco Carrarini.
    Copyright (C) 2022 Hanno Schwalm.
    Copyright (C) 2022 Martin Bařinka.
    Copyright (C) 2022 Nicolas Auffray.
    Copyright (C) 2022 Philipp Lutz.
    Copyright (C) 2023 Luca Zulberti.
    
    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/>.
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include "widgets/bauhaus.h"
#include "colorprofiles/colorspaces.h"
#include "math/math.h"
#include "develop/develop.h"
#include "system/openmp.h"
#include "system/target_clones.h"
#include "system/mem_alloc.h"
#include "system/simd.h"
#include "common/module_versioning.h"
#include "database/database.h"
#include "develop/imageop.h"
#include "develop/imageop_gui.h"
 
#include "gui/presets.h"
#include "gui/color_picker_proxy.h"
#include "iop/iop_api.h"
#include <assert.h>
#include <gtk/gtk.h>
#include <inttypes.h>
#include <stdlib.h>
#include <string.h>
#include "widgets/label.h"
 
DT_MODULE_INTROSPECTION(1, dt_iop_splittoning_params_t)
 
typedef struct dt_iop_splittoning_params_t
{
  float shadow_hue;           // $MIN: 0.0 $MAX: 1.0 $DEFAULT: 0.0 $DESCRIPTION: "hue"
  float shadow_saturation;    // $MIN: 0.0 $MAX: 1.0 $DEFAULT: 0.5 $DESCRIPTION: "saturation"
  float highlight_hue;        // $MIN: 0.0 $MAX: 1.0 $DEFAULT: 0.2 $DESCRIPTION: "hue"
  float highlight_saturation; // $MIN: 0.0 $MAX: 1.0 $DEFAULT: 0.5 $DESCRIPTION: "saturation"
  float balance;              // $MIN: 0.0 $MAX: 1.0 $DEFAULT: 0.5 center luminance of gradient
  float compress;             // $MIN: 0.0 $MAX: 100.0 $DEFAULT: 33.0 Compress range
} dt_iop_splittoning_params_t;
 
typedef struct dt_iop_splittoning_gui_data_t
{
  GtkWidget *balance_scale, *compress_scale;
  GtkWidget *shadow_colorpick, *highlight_colorpick;
  GtkWidget *shadow_hue_gslider, *shadow_sat_gslider;
  GtkWidget *highlight_hue_gslider, *highlight_sat_gslider;
} dt_iop_splittoning_gui_data_t;
 
typedef struct dt_iop_splittoning_data_t
{
  float shadow_hue;
  float shadow_saturation;
  float highlight_hue;
  float highlight_saturation;
  float balance;  // center luminance of gradient}
  float compress; // Compress range
} dt_iop_splittoning_data_t;
 
const char *name()
{
  return _("split-toning (legacy)");
}
 
int flags()
{
  return IOP_FLAGS_INCLUDE_IN_STYLES | IOP_FLAGS_SUPPORTS_BLENDING | IOP_FLAGS_ALLOW_TILING | IOP_FLAGS_DEPRECATED;
}
 
int default_group()
{
  return IOP_GROUP_EFFECTS;
}
 
int default_colorspace(dt_iop_module_t *self, dt_dev_pixelpipe_t *pipe, const dt_dev_pixelpipe_iop_t *piece)
{
  return IOP_CS_RGB;
}
 
const char **description(struct dt_iop_module_t *self)
{
  return dt_iop_set_description(self, _("use two specific colors for shadows and highlights and\n"
                                        "create a linear toning effect between them up to a pivot."),
                                      _("creative"),
                                      _("linear, RGB, scene-referred"),
                                      _("linear, RGB"),
                                      _("linear, RGB, scene-referred"));
}
 
void init_presets(dt_iop_module_so_t *self)
{
  dt_database_start_transaction();
 
  // shadows: #ED7212
  // highlights: #ECA413
  // balance : 63
  // compress : 0
  dt_gui_presets_add_generic(
      _("authentic sepia"), self->op, self->version(),
      &(dt_iop_splittoning_params_t){ 26.0 / 360.0, 92.0 / 100.0, 40.0 / 360.0, 92.0 / 100.0, 0.63, 0.0 },
      sizeof(dt_iop_splittoning_params_t), 1);
 
  // shadows: #446CBB
  // highlights: #446CBB
  // balance : 0
  // compress : 5.22
  dt_gui_presets_add_generic(
      _("authentic cyanotype"), self->op, self->version(),
      &(dt_iop_splittoning_params_t){ 220.0 / 360.0, 64.0 / 100.0, 220.0 / 360.0, 64.0 / 100.0, 0.0, 5.22 },
      sizeof(dt_iop_splittoning_params_t), 1);
 
  // shadows : #A16C5E
  // highlights : #A16C5E
  // balance : 100
  // compress : 0
  dt_gui_presets_add_generic(
      _("authentic platinotype"), self->op, self->version(),
      &(dt_iop_splittoning_params_t){ 13.0 / 360.0, 42.0 / 100.0, 13.0 / 360.0, 42.0 / 100.0, 100.0, 0.0 },
      sizeof(dt_iop_splittoning_params_t), 1);
 
  // shadows: #211A14
  // highlights: #D9D0C7
  // balance : 60
  // compress : 0
  dt_gui_presets_add_generic(
      _("chocolate brown"), self->op, self->version(),
      &(dt_iop_splittoning_params_t){ 28.0 / 360.0, 39.0 / 100.0, 28.0 / 360.0, 8.0 / 100.0, 0.60, 0.0 },
      sizeof(dt_iop_splittoning_params_t), 1);
 
  dt_database_release_transaction();
}
 
__DT_CLONE_TARGETS__
int process(struct dt_iop_module_t *self, const dt_dev_pixelpipe_t *pipe, const dt_dev_pixelpipe_iop_t *piece, const void *const ivoid,
             void *const ovoid)
{
  const dt_iop_roi_t *const roi_out = &piece->roi_out;
 
  const dt_iop_splittoning_data_t *const data = (dt_iop_splittoning_data_t *)piece->data;
  const float compress = (data->compress / 110.0) / 2.0; // Don't allow 100% compression..
 
  const float *const restrict in = DT_IS_ALIGNED((float*)ivoid);
  float *const restrict out = DT_IS_ALIGNED((float*)ovoid);
  const int npixels = roi_out->width * roi_out->height;
  __OMP_PARALLEL_FOR__()
  for(int k = 0; k < 4 * npixels; k += 4)
  {
    float h, s, l;
    rgb2hsl(in+k, &h, &s, &l);
    if(l < data->balance - compress)
    {
      // Zero-initialised: hsl2rgb() writes lanes 0..2 only, while for_each_channel() below
      // runs over all DT_PIXEL_SIMD_CHANNELS (4 here), so lane 3 would otherwise be read
      // straight off the stack and mixed into out[k+3].
      dt_aligned_pixel_t mixrgb = { 0.0f, 0.0f, 0.0f, 0.0f };
      hsl2rgb(mixrgb, data->shadow_hue, data->shadow_saturation, l);
 
      const float ra = CLIP((data->balance - compress - l) * 2.0f);
      const float la = (1.0f - ra);
 
      for_each_channel(c,aligned(in,out))
        out[k+c] = CLIP(in[k+c] * la + mixrgb[c] * ra);
    }
    else if(l > data->balance + compress)
    {
      dt_aligned_pixel_t mixrgb = { 0.0f, 0.0f, 0.0f, 0.0f };  // see the shadow branch above
      hsl2rgb(mixrgb, data->highlight_hue, data->highlight_saturation, l);
 
      const float ra = CLIP((l - (data->balance + compress)) * 2.0f);
      const float la = (1.0f - ra);
 
      for_each_channel(c,aligned(in,out))
        out[k+c] = CLIP(in[k+c] * la + mixrgb[c] * ra);
    }
    else
    {
      copy_pixel(out + k, in +k);
    }
 
  }
 
  return 0;
}
 
static inline void update_colorpicker_color(GtkWidget *colorpicker, float hue, float sat)
{
  dt_aligned_pixel_t rgb;
  hsl2rgb(rgb, hue, sat, 0.5);
 
  GdkRGBA color = (GdkRGBA){.red = rgb[0], .green = rgb[1], .blue = rgb[2], .alpha = 1.0 };
  gtk_color_chooser_set_rgba(GTK_COLOR_CHOOSER(colorpicker), &color);
}
 
static inline void update_saturation_slider_end_color(GtkWidget *slider, float hue)
{
  dt_aligned_pixel_t rgb;
  hsl2rgb(rgb, hue, 1.0, 0.5);
  dt_bauhaus_slider_set_stop(slider, 1.0, rgb[0], rgb[1], rgb[2]);
}
 
static inline void update_balance_slider_colors(
    GtkWidget *slider,
    float shadow_hue,
    float highlight_hue)
{
  dt_aligned_pixel_t rgb;
  if(shadow_hue != -1)
  {
    hsl2rgb(rgb, shadow_hue, 1.0, 0.5);
    dt_bauhaus_slider_set_stop(slider, 0.0, rgb[0], rgb[1], rgb[2]);
  }
  if(highlight_hue != -1)
  {
    hsl2rgb(rgb, highlight_hue, 1.0, 0.5);
    dt_bauhaus_slider_set_stop(slider, 1.0, rgb[0], rgb[1], rgb[2]);
  }
 
  gtk_widget_queue_draw(GTK_WIDGET(slider));
}
 
void gui_changed(dt_iop_module_t *self, GtkWidget *w, void *previous)
{
  dt_iop_splittoning_params_t *p = (dt_iop_splittoning_params_t *)self->params;
  dt_iop_splittoning_gui_data_t *g = (dt_iop_splittoning_gui_data_t *)dt_iop_gui_data(self);
 
  if(w == g->shadow_sat_gslider || w == g->shadow_hue_gslider)
  {
    update_colorpicker_color(g->shadow_colorpick, p->shadow_hue, p->shadow_saturation);
 
    if(w == g->shadow_hue_gslider)
    {
      update_balance_slider_colors(g->balance_scale, p->shadow_hue, -1);
      update_saturation_slider_end_color(g->shadow_sat_gslider, p->shadow_hue);
 
      gtk_widget_queue_draw(GTK_WIDGET(g->shadow_sat_gslider));
    }
  }
  else if(w == g->highlight_sat_gslider || w == g->highlight_hue_gslider)
  {
    update_colorpicker_color(g->highlight_colorpick, p->highlight_hue, p->highlight_saturation);
 
    if(w == g->highlight_hue_gslider)
    {
      update_balance_slider_colors(g->balance_scale, -1, p->highlight_hue);
      update_saturation_slider_end_color(g->highlight_sat_gslider, p->highlight_hue);
 
      gtk_widget_queue_draw(GTK_WIDGET(g->highlight_sat_gslider));
    }
  }
}
 
static void colorpick_callback(GtkColorButton *widget, dt_iop_module_t *self)
{
  if(dt_gui_widgets_suppressed()) return;
 
  dt_iop_splittoning_gui_data_t *g = (dt_iop_splittoning_gui_data_t *)dt_iop_gui_data(self);
 
  dt_aligned_pixel_t color;
  float h, s, l;
 
  GdkRGBA c;
  gtk_color_chooser_get_rgba(GTK_COLOR_CHOOSER(widget), &c);
  color[0] = c.red;
  color[1] = c.green;
  color[2] = c.blue;
  rgb2hsl(color, &h, &s, &l);
 
  if (GTK_WIDGET(widget) == g->shadow_colorpick)
  {
      dt_bauhaus_slider_set(g->shadow_hue_gslider, h);
      dt_bauhaus_slider_set(g->shadow_sat_gslider, s);
      update_balance_slider_colors(g->balance_scale, h, -1);
  }
  else
  {
      dt_bauhaus_slider_set(g->highlight_hue_gslider, h);
      dt_bauhaus_slider_set(g->highlight_sat_gslider, s);
      update_balance_slider_colors(g->balance_scale, -1,  h);
  }
 
  gtk_widget_queue_draw(GTK_WIDGET(g->balance_scale));
 
  dt_dev_add_history_item(self->dev, self, TRUE, TRUE);
}
 
void color_picker_apply(dt_iop_module_t *self, GtkWidget *picker, dt_dev_pixelpipe_t *pipe, dt_dev_pixelpipe_iop_t *piece)
{
  dt_iop_splittoning_gui_data_t *g = (dt_iop_splittoning_gui_data_t *)dt_iop_gui_data(self);
  dt_iop_splittoning_params_t *p = (dt_iop_splittoning_params_t *)self->params;
 
  float *p_hue, *p_saturation;
  GtkWidget *sat, *hue, *colorpicker;
 
  // convert picker RGB 2 HSL
  float H = .0f, S = .0f, L = .0f;
  rgb2hsl(self->picked_color, &H, &S, &L);
 
  if(picker == g->highlight_hue_gslider)
  {
    p_hue = &p->highlight_hue;
    p_saturation = &p->highlight_saturation;
    hue = g->highlight_hue_gslider;
    sat = g->highlight_sat_gslider;
    colorpicker = g->highlight_colorpick;
    update_balance_slider_colors(g->balance_scale, -1, H);
  }
  else
  {
    p_hue = &p->shadow_hue;
    p_saturation = &p->shadow_saturation;
    hue = g->shadow_hue_gslider;
    sat = g->shadow_sat_gslider;
    colorpicker = g->shadow_colorpick;
    update_balance_slider_colors(g->balance_scale, H, -1);
  }
 
  if(fabsf(*p_hue - H) < 0.0001f && fabsf(*p_saturation - S) < 0.0001f)
  {
    // interrupt infinite loops
    return;
  }
 
  *p_hue        = H;
  *p_saturation = S;
 
  dt_gui_freeze_begin();
  dt_bauhaus_slider_set(hue, H);
  dt_bauhaus_slider_set(sat, S);
  update_colorpicker_color(colorpicker, H, S);
  update_saturation_slider_end_color(sat, H);
  dt_gui_freeze_end();
 
  gtk_widget_queue_draw(GTK_WIDGET(g->balance_scale));
 
  dt_dev_add_history_item(self->dev, self, TRUE, TRUE);
}
 
void commit_params(struct dt_iop_module_t *self, dt_iop_params_t *p1, dt_dev_pixelpipe_t *pipe,
                   dt_dev_pixelpipe_iop_t *piece)
{
  dt_iop_splittoning_params_t *p = (dt_iop_splittoning_params_t *)p1;
  dt_iop_splittoning_data_t *d = (dt_iop_splittoning_data_t *)piece->data;
 
  d->shadow_hue = p->shadow_hue;
  d->highlight_hue = p->highlight_hue;
  d->shadow_saturation = p->shadow_saturation;
  d->highlight_saturation = p->highlight_saturation;
  d->balance = p->balance;
  d->compress = p->compress;
}
 
void init_pipe(struct dt_iop_module_t *self, dt_dev_pixelpipe_t *pipe, dt_dev_pixelpipe_iop_t *piece)
{
  piece->data = dt_calloc_align(sizeof(dt_iop_splittoning_data_t));
  piece->data_size = sizeof(dt_iop_splittoning_data_t);
}
 
void cleanup_pipe(struct dt_iop_module_t *self, dt_dev_pixelpipe_t *pipe, dt_dev_pixelpipe_iop_t *piece)
{
  dt_free_align(piece->data);
  piece->data = NULL;
}
 
void gui_update(struct dt_iop_module_t *self)
{
  dt_iop_splittoning_gui_data_t *g = (dt_iop_splittoning_gui_data_t *)dt_iop_gui_data(self);
  dt_iop_splittoning_params_t *p = (dt_iop_splittoning_params_t *)self->params;
 
  dt_bauhaus_slider_set(g->shadow_hue_gslider, p->shadow_hue);
  dt_bauhaus_slider_set(g->shadow_sat_gslider, p->shadow_saturation);
  dt_bauhaus_slider_set(g->highlight_hue_gslider, p->highlight_hue);
  dt_bauhaus_slider_set(g->highlight_sat_gslider, p->highlight_saturation);
  dt_bauhaus_slider_set(g->balance_scale, p->balance);
  dt_bauhaus_slider_set(g->compress_scale, p->compress);
 
  update_colorpicker_color(GTK_WIDGET(g->shadow_colorpick), p->shadow_hue, p->shadow_saturation);
  update_colorpicker_color(GTK_WIDGET(g->highlight_colorpick), p->highlight_hue, p->highlight_saturation);
  update_saturation_slider_end_color(g->shadow_sat_gslider, p->shadow_hue);
  update_saturation_slider_end_color(g->highlight_sat_gslider, p->highlight_hue);
 
  update_balance_slider_colors(g->balance_scale, p->shadow_hue, p->highlight_hue);
}
 
static inline void gui_init_section(struct dt_iop_module_t *self, char *section, GtkWidget *slider_box,
                                    GtkWidget *hue, GtkWidget *saturation, GtkWidget **picker, gboolean top)
{
  GtkWidget *label = dt_ui_section_label_new(_(section));
 
  gtk_box_pack_start(GTK_BOX(self->gui->widget), label, FALSE, FALSE, 0);
 
  dt_bauhaus_widget_set_label(hue, N_("hue"));
  dt_bauhaus_slider_set_feedback(hue, 0);
  dt_bauhaus_slider_set_stop(hue, 0.0f  , 1.0f, 0.0f, 0.0f);
  dt_bauhaus_slider_set_stop(hue, 0.166f, 1.0f, 1.0f, 0.0f);
  dt_bauhaus_slider_set_stop(hue, 0.322f, 0.0f, 1.0f, 0.0f);
  dt_bauhaus_slider_set_stop(hue, 0.498f, 0.0f, 1.0f, 1.0f);
  dt_bauhaus_slider_set_stop(hue, 0.664f, 0.0f, 0.0f, 1.0f);
  dt_bauhaus_slider_set_stop(hue, 0.830f, 1.0f, 0.0f, 1.0f);
  dt_bauhaus_slider_set_stop(hue, 1.0f  , 1.0f, 0.0f, 0.0f);
  gtk_widget_set_tooltip_text(hue, _("select the hue tone"));
  dt_color_picker_new(self, DT_COLOR_PICKER_POINT, hue);
 
  dt_bauhaus_widget_set_label(saturation, N_("saturation"));
  dt_bauhaus_slider_set_stop(saturation, 0.0f, 0.2f, 0.2f, 0.2f);
  dt_bauhaus_slider_set_stop(saturation, 1.0f, 1.0f, 1.0f, 1.0f);
  gtk_widget_set_tooltip_text(saturation, _("select the saturation tone"));
 
  *picker = gtk_color_button_new();
  gtk_color_chooser_set_use_alpha(GTK_COLOR_CHOOSER(*picker), FALSE);
  gtk_color_button_set_title(GTK_COLOR_BUTTON(*picker), _("select tone color"));
  g_signal_connect(G_OBJECT(*picker), "color-set", G_CALLBACK(colorpick_callback), self);
 
  GtkWidget *hbox = gtk_box_new(GTK_ORIENTATION_HORIZONTAL, DT_GUI_BOX_SPACING);
  gtk_box_pack_start(GTK_BOX(hbox), slider_box, TRUE, TRUE, 0);
  gtk_box_pack_end(GTK_BOX(hbox), *picker, FALSE, FALSE, 0);
  gtk_box_pack_start(GTK_BOX(self->gui->widget), hbox, FALSE, FALSE, 0);
}
 
void gui_init(struct dt_iop_module_t *self)
{
  dt_iop_splittoning_gui_data_t *g = IOP_GUI_ALLOC(splittoning);
 
  GtkWidget *shadows_box = self->gui->widget = gtk_box_new(GTK_ORIENTATION_VERTICAL, DT_GUI_BOX_SPACING);
  g->shadow_hue_gslider = dt_bauhaus_slider_from_params(self, "shadow_hue");
  dt_bauhaus_slider_set_factor(g->shadow_hue_gslider, 360.0f);
  dt_bauhaus_slider_set_format(g->shadow_hue_gslider, "\302\260");
  g->shadow_sat_gslider = dt_bauhaus_slider_from_params(self, "shadow_saturation");
 
  GtkWidget *highlights_box = self->gui->widget = gtk_box_new(GTK_ORIENTATION_VERTICAL, DT_GUI_BOX_SPACING);
  g->highlight_hue_gslider = dt_bauhaus_slider_from_params(self, "highlight_hue");
  dt_bauhaus_slider_set_factor(g->highlight_hue_gslider, 360.0f);
  dt_bauhaus_slider_set_format(g->highlight_hue_gslider, "\302\260");
  g->highlight_sat_gslider = dt_bauhaus_slider_from_params(self, "highlight_saturation");
 
  // start building top level widget
  self->gui->widget = gtk_box_new(GTK_ORIENTATION_VERTICAL, DT_GUI_BOX_SPACING);
 
  gui_init_section(self, N_("shadows"), shadows_box, g->shadow_hue_gslider, g->shadow_sat_gslider, &g->shadow_colorpick, TRUE);
 
  gui_init_section(self, N_("highlights"), highlights_box, g->highlight_hue_gslider, g->highlight_sat_gslider, &g->highlight_colorpick, FALSE);
 
  // Additional parameters
  gtk_box_pack_start(GTK_BOX(self->gui->widget), dt_ui_section_label_new(_("properties")), FALSE, FALSE, 0);
 
  g->balance_scale = dt_bauhaus_slider_from_params(self, N_("balance"));
  dt_bauhaus_slider_set_feedback(g->balance_scale, 0);
  dt_bauhaus_slider_set_digits(g->balance_scale, 4);
  dt_bauhaus_slider_set_factor(g->balance_scale, -100.0);
  dt_bauhaus_slider_set_offset(g->balance_scale, +100.0);
  dt_bauhaus_slider_set_stop(g->balance_scale, 0.0f, 0.5f, 0.5f, 0.5f);
  dt_bauhaus_slider_set_stop(g->balance_scale, 1.0f, 0.5f, 0.5f, 0.5f);
  gtk_widget_set_tooltip_text(g->balance_scale, _("the balance of center of split-toning"));
 
  g->compress_scale = dt_bauhaus_slider_from_params(self, N_("compress"));
  dt_bauhaus_slider_set_format(g->compress_scale, "%");
  gtk_widget_set_tooltip_text(g->compress_scale, _("compress the effect on highlights/shadows and\npreserve mid-tones"));
}
 
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// 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