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/* GIMP - The GNU Image Manipulation Program
* Copyright (C) 1995-1997 Spencer Kimball and Peter Mattis
*
* gimppropgui-vignette.c
* Copyright (C) 2020 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 "libgimpmath/gimpmath.h"
#include "libgimpwidgets/gimpwidgets.h"
#include "propgui-types.h"
#include "core/gimpcontext.h"
#include "gimppropgui.h"
#include "gimppropgui-generic.h"
#include "gimppropgui-vignette.h"
#include "gimp-intl.h"
#define MAX_GAMMA 1000.0
static void
focus_callback (GObject *config,
GeglRectangle *area,
GimpLimitType type,
gdouble x,
gdouble y,
gdouble radius,
gdouble aspect_ratio,
gdouble angle,
gdouble inner_limit,
gdouble midpoint)
{
gdouble proportion;
gdouble squeeze;
gdouble scale;
g_object_set_data_full (G_OBJECT (config), "area",
g_memdup (area, sizeof (GeglRectangle)),
(GDestroyNotify) g_free);
g_object_get (config,
"proportion", &proportion,
NULL);
if (aspect_ratio >= 0.0)
scale = 1.0 - aspect_ratio;
else
scale = 1.0 / (1.0 + aspect_ratio);
scale /= 1.0 + proportion * ((gdouble) area->height / area->width - 1.0);
if (scale <= 1.0)
squeeze = +2.0 * atan (1.0 / scale - 1.0) / G_PI;
else
squeeze = -2.0 * atan (scale - 1.0) / G_PI;
g_object_set (config,
"shape", type,
"x", x / area->width,
"y", y / area->height,
"radius", 2.0 * radius / area->width,
"proportion", proportion,
"squeeze", squeeze,
"rotation", fmod (fmod (angle * 180.0 / G_PI, 360.0) + 360.0,
360.0),
"softness", 1.0 - inner_limit,
"gamma", midpoint < 1.0 ?
MIN (log (0.5) / log (midpoint), MAX_GAMMA) :
MAX_GAMMA,
NULL);
}
static void
config_notify (GObject *config,
const GParamSpec *pspec,
gpointer set_data)
{
GimpControllerFocusCallback set_func;
GeglRectangle *area;
GimpLimitType shape;
gdouble x, y;
gdouble radius;
gdouble proportion;
gdouble squeeze;
gdouble rotation;
gdouble softness;
gdouble gamma;
gdouble aspect_ratio;
set_func = g_object_get_data (G_OBJECT (config), "set-func");
area = g_object_get_data (G_OBJECT (config), "area");
g_object_get (config,
"shape", &shape,
"x", &x,
"y", &y,
"radius", &radius,
"proportion", &proportion,
"squeeze", &squeeze,
"rotation", &rotation,
"softness", &softness,
"gamma", &gamma,
NULL);
aspect_ratio = 1.0 + ((gdouble) area->height / area->width - 1.0) *
proportion;
if (squeeze >= 0.0)
aspect_ratio /= tan (+squeeze * G_PI / 2.0) + 1.0;
else
aspect_ratio *= tan (-squeeze * G_PI / 2.0) + 1.0;
if (aspect_ratio <= 1.0)
aspect_ratio = 1.0 - aspect_ratio;
else
aspect_ratio = 1.0 / aspect_ratio - 1.0;
set_func (set_data, area,
shape,
x * area->width,
y * area->height,
radius * area->width / 2.0,
aspect_ratio,
rotation / 180.0 * G_PI,
1.0 - softness,
pow (0.5, 1.0 / gamma));
}
GtkWidget *
_gimp_prop_gui_new_vignette (GObject *config,
GParamSpec **param_specs,
guint n_param_specs,
GeglRectangle *area,
GimpContext *context,
GimpCreatePickerFunc create_picker_func,
GimpCreateControllerFunc create_controller_func,
gpointer creator)
{
GtkWidget *vbox;
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 (GIMP_IS_CONTEXT (context), NULL);
vbox = _gimp_prop_gui_new_generic (config,
param_specs, n_param_specs,
area, context,
create_picker_func,
create_controller_func,
creator);
if (create_controller_func)
{
GCallback set_func;
gpointer set_data;
set_func = create_controller_func (creator,
GIMP_CONTROLLER_TYPE_FOCUS,
_("Vignette: "),
(GCallback) focus_callback,
config,
&set_data);
g_object_set_data (G_OBJECT (config), "set-func", set_func);
g_object_set_data_full (G_OBJECT (config), "area",
g_memdup (area, sizeof (GeglRectangle)),
(GDestroyNotify) g_free);
config_notify (config, NULL, set_data);
g_signal_connect (config, "notify",
G_CALLBACK (config_notify),
set_data);
}
return vbox;
}
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