vibrance.c

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/*
    This file is part of darktable,
    Copyright (C) 2011-2012 Henrik Andersson.
    Copyright (C) 2012 Richard Wonka.
    Copyright (C) 2012-2014, 2016, 2019 Tobias Ellinghaus.
    Copyright (C) 2012, 2014 Ulrich Pegelow.
    Copyright (C) 2013 Simon Spannagel.
    Copyright (C) 2014-2016 Roman Lebedev.
    Copyright (C) 2015 Pedro Côrte-Real.
    Copyright (C) 2017 Heiko Bauke.
    Copyright (C) 2018, 2020, 2023, 2025-2026 Aurélien PIERRE.
    Copyright (C) 2018 Edgardo Hoszowski.
    Copyright (C) 2018 Maurizio Paglia.
    Copyright (C) 2018, 2020-2022 Pascal Obry.
    Copyright (C) 2018 rawfiner.
    Copyright (C) 2019 Andreas Schneider.
    Copyright (C) 2019 Diederik ter Rahe.
    Copyright (C) 2020 Aldric Renaudin.
    Copyright (C) 2020, 2022 Diederik Ter Rahe.
    Copyright (C) 2020-2021 Ralf Brown.
    Copyright (C) 2021 Chris Elston.
    Copyright (C) 2022 Hanno Schwalm.
    Copyright (C) 2022 Martin Bařinka.
    Copyright (C) 2022 Philipp Lutz.
    
    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 <assert.h>
#include <math.h>
#include <stdlib.h>
#include <string.h>
 
#include "bauhaus/bauhaus.h"
#include "common/opencl.h"
#include "control/control.h"
#include "develop/develop.h"
#include "develop/imageop.h"
#include "develop/imageop_gui.h"
 
#include "gui/gtk.h"
#include "iop/iop_api.h"
#include <gtk/gtk.h>
#include <inttypes.h>
 
DT_MODULE_INTROSPECTION(2, dt_iop_vibrance_params_t)
 
typedef struct dt_iop_vibrance_params_t
{
  float amount; // $MIN: 0.0 $MAX: 100.0 $DEFAULT: 25.0 $DESCRIPTION: "vibrance"
} dt_iop_vibrance_params_t;
 
typedef struct dt_iop_vibrance_gui_data_t
{
  GtkWidget *amount_scale;
} dt_iop_vibrance_gui_data_t;
 
typedef struct dt_iop_vibrance_data_t
{
  float amount;
} dt_iop_vibrance_data_t;
 
const char *deprecated_msg()
{
  return _("this module is deprecated. please use the vibrance slider in the color balance rgb module instead.");
}
 
const char *name()
{
  return _("vibrance");
}
 
const char *aliases()
{
  return _("saturation");
}
 
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_COLOR;
}
 
int default_colorspace(dt_iop_module_t *self, dt_dev_pixelpipe_t *pipe, const dt_dev_pixelpipe_iop_t *piece)
{
  return IOP_CS_LAB;
}
 
const char **description(struct dt_iop_module_t *self)
{
  return dt_iop_set_description(self, _("saturate and reduce the lightness of the most saturated pixels\n"
                                        "to make the colors more vivid."),
                                      _("creative"),
                                      _("linear or non-linear, Lab, display-referred"),
                                      _("non-linear, Lab"),
                                      _("non-linear, Lab, display-referred"));
}
 
__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_vibrance_data_t *const d = (dt_iop_vibrance_data_t *)piece->data;
  const float *const restrict in = (float *)ivoid;
  float *const restrict out = (float *)ovoid;
 
  const float amount = (d->amount * 0.01);
  const int npixels = roi_out->height * roi_out->width;
  __OMP_PARALLEL_FOR__()
  for(int k = 0; k < 4 * npixels; k += 4)
  {
    /* saturation weight 0 - 1 */
    const float sw = sqrtf((in[k + 1] * in[k + 1]) + (in[k + 2] * in[k + 2])) / 256.0f;
    const float ls = 1.0f - ((amount * sw) * .25f);
    const float ss = 1.0f + (amount * sw);
    const dt_aligned_pixel_t weights = { ls, ss, ss, 1.0f };
    __OMP_SIMD__(aligned(in, out : 16))
    for (int c = 0; c < 4; c++)
    {
      out[k + c] = in[k + c] * weights[c];
    }
  }
  return 0;
}
 
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_vibrance_params_t *p = (dt_iop_vibrance_params_t *)p1;
  dt_iop_vibrance_data_t *d = (dt_iop_vibrance_data_t *)piece->data;
  d->amount = p->amount;
}
 
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_vibrance_data_t));
  piece->data_size = sizeof(dt_iop_vibrance_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_vibrance_gui_data_t *g = (dt_iop_vibrance_gui_data_t *)self->gui_data;
  dt_iop_vibrance_params_t *p = (dt_iop_vibrance_params_t *)self->params;
  dt_bauhaus_slider_set(g->amount_scale, p->amount);
}
 
void gui_init(struct dt_iop_module_t *self)
{
  dt_iop_vibrance_gui_data_t *g = IOP_GUI_ALLOC(vibrance);
 
  g->amount_scale = dt_bauhaus_slider_from_params(self, "amount");
  dt_bauhaus_slider_set_format(g->amount_scale, "%");
  gtk_widget_set_tooltip_text(g->amount_scale, _("the amount of vibrance"));
}
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