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-rw-r--r--app/propgui/gimppropgui-motion-blur-circular.c151
1 files changed, 151 insertions, 0 deletions
diff --git a/app/propgui/gimppropgui-motion-blur-circular.c b/app/propgui/gimppropgui-motion-blur-circular.c
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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;
+}