diff options
Diffstat (limited to 'app/propgui/gimppropgui-vignette.c')
| -rw-r--r-- | app/propgui/gimppropgui-vignette.c | 202 |
1 files changed, 202 insertions, 0 deletions
diff --git a/app/propgui/gimppropgui-vignette.c b/app/propgui/gimppropgui-vignette.c new file mode 100644 index 0000000..5d8ef81 --- /dev/null +++ b/app/propgui/gimppropgui-vignette.c @@ -0,0 +1,202 @@ +/* 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; +} |