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/* GIMP - The GNU Image Manipulation Program
* Copyright (C) 1995-1997 Spencer Kimball and Peter Mattis
*
* gimppropgui-motion-blur-circular.c
* Copyright (C) 2019 Michael Natterer <mitch@gimp.org>
*
* 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-generic.h"
#include "gimppropgui-motion-blur-circular.h"
#include "gimp-intl.h"
static void
line_callback (GObject *config,
GeglRectangle *area,
gdouble x1,
gdouble y1,
gdouble x2,
gdouble y2)
{
gdouble x, y;
gdouble angle;
g_object_set_data_full (G_OBJECT (config), "area",
g_memdup (area, sizeof (GeglRectangle)),
(GDestroyNotify) g_free);
x = x1 / area->width;
y = y1 / area->height;
angle = atan2 (-(y2 - y1), x2 - x1);
angle = angle * 180.0 / G_PI;
if (angle < 0)
angle += 360.0;
g_object_set (config,
"center-x", x,
"center-y", y,
"angle", angle,
NULL);
}
static void
config_notify (GObject *config,
const GParamSpec *pspec,
gpointer set_data)
{
GimpControllerLineCallback set_func;
GeglRectangle *area;
gdouble x, y;
gdouble angle;
gdouble x1, y1, x2, y2;
set_func = g_object_get_data (G_OBJECT (config), "set-func");
area = g_object_get_data (G_OBJECT (config), "area");
g_object_get (config,
"center-x", &x,
"center-y", &y,
"angle", &angle,
NULL);
angle = angle / 180.0 * G_PI;
x1 = x * area->width;
y1 = y * area->height;
x2 = x1 + cos (angle) * 100;
y2 = y1 - sin (angle) * 100;
set_func (set_data, area, x1, y1, x2, y2);
}
GtkWidget *
_gimp_prop_gui_new_motion_blur_circular (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_LINE,
_("Circular Motion Blur: "),
(GCallback) line_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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