colorchart.h

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/*
 *    This file is part of darktable,
 *    Copyright (C) 2016 johannes hanika.
 *    Copyright (C) 2016-2017 Tobias Ellinghaus.
 *    Copyright (C) 2020 Aurélien PIERRE.
 *    Copyright (C) 2020 Pascal Obry.
 *    Copyright (C) 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/>.
 */
 
#ifndef DT_APPS_ANSEL_CHART_COLORCHART_H
#define DT_APPS_ANSEL_CHART_COLORCHART_H
 
#include "colorprofiles/profile_types.h"
#include "math/homography.h"   // point_t
 
#include <glib.h>
 
typedef struct f_line_t
{
  point_t p[4];
} f_line_t;
 
typedef struct box_t
{
  // position
  point_t p;
  float w, h;
  // color
  dt_colorspaces_color_profile_type_t color_space;
  dt_aligned_pixel_t color; // either XYZ or Lab, depending on color_space
  dt_aligned_pixel_t rgb;   // color converted to sRGB for rough displaying of patches
} box_t;
 
typedef struct chart_t
{
  // the F marks
  GList *f_list;
  // the two kinds of boxen
  GHashTable *d_table, *box_table;
  // the box sets. the data is as follows:
  // a hash table with a human readable name as key. the values are GList* with the names of patches.
  // use those to lookup box_table
  GHashTable *patch_sets;
  // the bounding box
  float bb_w, bb_h;
  // other data from the CHT file
  float box_shrink, ref_rotation;
} chart_t;
 
 
void free_chart(chart_t *chart);
chart_t *parse_cht(const char *filename);
int parse_it8(const char *filename, chart_t *chart);
void checker_set_color(box_t *box, dt_colorspaces_color_profile_type_t color_space, float c0, float c1, float c2);
 
#endif // DT_APPS_ANSEL_CHART_COLORCHART_H
 
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