guides.h

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/*
    This file is part of darktable,
    Copyright (C) 2012 Richard Wonka.
    Copyright (C) 2012-2016 Tobias Ellinghaus.
    Copyright (C) 2020-2021 Diederik Ter Rahe.
    Copyright (C) 2020 Pascal Obry.
    Copyright (C) 2021 Aldric Renaudin.
    Copyright (C) 2022 Chris Elston.
    Copyright (C) 2022 Martin Bařinka.
    Copyright (C) 2024 Aurélien PIERRE.
    
    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_GUI_GUIDES_H
#define DT_GUI_GUIDES_H
 
#include "develop/imageop.h"
#include "views/view.h"
 
typedef void (*dt_guides_draw_callback)(cairo_t *cr, const float x, const float y,
                                        const float w, const float h,
                                        const float zoom_scale, void *user_data);
 
typedef GtkWidget *(*dt_guides_widget_callback)(dt_iop_module_t *self, void *user_data);
 
typedef struct dt_guides_t
{
  char name[64];
  dt_guides_draw_callback draw;
  dt_guides_widget_callback widget;
  void *user_data;
  GDestroyNotify free;
  gboolean support_flip;
} dt_guides_t;
 
void dt_guides_init(void);
void dt_guides_cleanup(void);
 
void dt_guides_add_guide(const char *name, dt_guides_draw_callback draw, dt_guides_widget_callback widget, void *user_data, GDestroyNotify free);
 
// create the popover to setup the guides
GtkWidget *dt_guides_popover(dt_view_t *self, GtkWidget *button);
void dt_guides_update_popover_values();
 
// draw the guide on screen
void dt_guides_draw(cairo_t *cr, const float left, const float top, const float width, const float height,
                    const float zoom_scale);
 
// routines for the module toolbar button
void dt_guides_update_button_state();
void dt_guides_button_toggled(gboolean active);
 
void dt_guides_set_overlay_colors();
 
#endif // DT_GUI_GUIDES_H
 
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