PIKApp/app/propgui/pikapropgui-color-to-alpha.c

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2023-09-26 00:35:21 +02:00
/* PIKA - Photo and Image Kooker Application
* a rebranding of The GNU Image Manipulation Program (created with heckimp)
* A derived work which may be trivial. However, any changes may be (C)2023 by Aldercone Studio
*
* Original copyright, applying to most contents (license remains unchanged):
* Copyright (C) 1995-1997 Spencer Kimball and Peter Mattis
*
* pikapropgui-color-to-alpha.c
* Copyright (C) 2017 Ell
*
* This program 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.
*
* This program 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 this program. If not, see <https://www.gnu.org/licenses/>.
*/
#include "config.h"
#include <gegl.h>
#include <gtk/gtk.h>
#include "libpikamath/pikamath.h"
#include "libpikawidgets/pikawidgets.h"
#include "propgui-types.h"
#include "core/pikacontext.h"
#include "pikapropgui.h"
#include "pikapropgui-color-to-alpha.h"
#include "pikapropgui-generic.h"
#include "pika-intl.h"
static void
threshold_picked (GObject *config,
gpointer identifier,
gdouble x,
gdouble y,
const Babl *sample_format,
const PikaRGB *picked_color)
{
PikaRGB *color;
gdouble threshold = 0.0;
g_object_get (config,
"color", &color,
NULL);
threshold = MAX (threshold, fabs (picked_color->r - color->r));
threshold = MAX (threshold, fabs (picked_color->g - color->g));
threshold = MAX (threshold, fabs (picked_color->b - color->b));
g_object_set (config,
identifier, threshold,
NULL);
g_free (color);
}
GtkWidget *
_pika_prop_gui_new_color_to_alpha (GObject *config,
GParamSpec **param_specs,
guint n_param_specs,
GeglRectangle *area,
PikaContext *context,
PikaCreatePickerFunc create_picker_func,
PikaCreateControllerFunc create_controller_func,
gpointer creator)
{
GtkWidget *vbox;
GtkWidget *button;
GtkWidget *hbox;
GtkWidget *scale;
const gchar *label;
g_return_val_if_fail (G_IS_OBJECT (config), NULL);
g_return_val_if_fail (param_specs != NULL, NULL);
g_return_val_if_fail (n_param_specs > 0, NULL);
g_return_val_if_fail (PIKA_IS_CONTEXT (context), NULL);
vbox = gtk_box_new (GTK_ORIENTATION_VERTICAL, 4);
button = _pika_prop_gui_new_generic (config, param_specs, 1,
area, context, create_picker_func, NULL,
creator);
gtk_box_pack_start (GTK_BOX (vbox), button, FALSE, FALSE, 0);
hbox = gtk_box_new (GTK_ORIENTATION_HORIZONTAL, 4);
gtk_box_pack_start (GTK_BOX (vbox), hbox, FALSE, FALSE, 0);
gtk_widget_show (hbox);
scale = pika_prop_widget_new (config, "transparency-threshold",
area, context, NULL, NULL, NULL, &label);
gtk_box_pack_start (GTK_BOX (hbox), scale, TRUE, TRUE, 0);
if (create_picker_func)
{
button = create_picker_func (creator,
"transparency-threshold",
PIKA_ICON_COLOR_PICKER_GRAY,
_("Pick farthest full-transparency color"),
/* pick_abyss = */ FALSE,
(PikaPickerCallback) threshold_picked,
config);
gtk_box_pack_start (GTK_BOX (hbox), button, FALSE, FALSE, 0);
gtk_widget_show (button);
}
hbox = gtk_box_new (GTK_ORIENTATION_HORIZONTAL, 4);
gtk_box_pack_start (GTK_BOX (vbox), hbox, FALSE, FALSE, 0);
gtk_widget_show (hbox);
scale = pika_prop_widget_new (config, "opacity-threshold",
area, context, NULL, NULL, NULL, &label);
gtk_box_pack_start (GTK_BOX (hbox), scale, TRUE, TRUE, 0);
if (create_picker_func)
{
button = create_picker_func (creator,
"opacity-threshold",
PIKA_ICON_COLOR_PICKER_GRAY,
_("Pick nearest full-opacity color"),
/* pick_abyss = */ FALSE,
(PikaPickerCallback) threshold_picked,
config);
gtk_box_pack_start (GTK_BOX (hbox), button, FALSE, FALSE, 0);
gtk_widget_show (button);
}
return vbox;
}