summaryrefslogtreecommitdiffstats
path: root/app/core/gimpsymmetry-mandala.c
diff options
context:
space:
mode:
Diffstat (limited to '')
-rw-r--r--app/core/gimpsymmetry-mandala.c574
1 files changed, 574 insertions, 0 deletions
diff --git a/app/core/gimpsymmetry-mandala.c b/app/core/gimpsymmetry-mandala.c
new file mode 100644
index 0000000..668819a
--- /dev/null
+++ b/app/core/gimpsymmetry-mandala.c
@@ -0,0 +1,574 @@
+/* GIMP - The GNU Image Manipulation Program
+ * Copyright (C) 1995 Spencer Kimball and Peter Mattis
+ *
+ * gimpsymmetry-mandala.c
+ * Copyright (C) 2015 Jehan <jehan@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 <string.h>
+
+#include <cairo.h>
+#include <gegl.h>
+#include <gdk-pixbuf/gdk-pixbuf.h>
+
+#include "libgimpconfig/gimpconfig.h"
+#include "libgimpmath/gimpmath.h"
+
+#include "core-types.h"
+
+#include "gimp.h"
+#include "gimp-cairo.h"
+#include "gimpdrawable.h"
+#include "gimpguide.h"
+#include "gimpimage.h"
+#include "gimpimage-guides.h"
+#include "gimpimage-symmetry.h"
+#include "gimpitem.h"
+#include "gimpsymmetry-mandala.h"
+
+#include "gimp-intl.h"
+
+
+enum
+{
+ PROP_0,
+ PROP_CENTER_X,
+ PROP_CENTER_Y,
+ PROP_SIZE,
+ PROP_DISABLE_TRANSFORMATION,
+ PROP_ENABLE_REFLECTION,
+};
+
+
+/* Local function prototypes */
+
+static void gimp_mandala_constructed (GObject *object);
+static void gimp_mandala_finalize (GObject *object);
+static void gimp_mandala_set_property (GObject *object,
+ guint property_id,
+ const GValue *value,
+ GParamSpec *pspec);
+static void gimp_mandala_get_property (GObject *object,
+ guint property_id,
+ GValue *value,
+ GParamSpec *pspec);
+static void gimp_mandala_active_changed (GimpSymmetry *sym);
+
+static void gimp_mandala_add_guide (GimpMandala *mandala,
+ GimpOrientationType orientation);
+static void gimp_mandala_remove_guide (GimpMandala *mandala,
+ GimpOrientationType orientation);
+static void gimp_mandala_guide_removed_cb (GObject *object,
+ GimpMandala *mandala);
+static void gimp_mandala_guide_position_cb (GObject *object,
+ GParamSpec *pspec,
+ GimpMandala *mandala);
+
+static void gimp_mandala_update_strokes (GimpSymmetry *mandala,
+ GimpDrawable *drawable,
+ GimpCoords *origin);
+static void gimp_mandala_get_transform (GimpSymmetry *mandala,
+ gint stroke,
+ gdouble *angle,
+ gboolean *reflect);
+static void gimp_mandala_image_size_changed_cb (GimpImage *image,
+ gint previous_origin_x,
+ gint previous_origin_y,
+ gint previous_width,
+ gint previous_height,
+ GimpSymmetry *sym);
+
+
+G_DEFINE_TYPE (GimpMandala, gimp_mandala, GIMP_TYPE_SYMMETRY)
+
+#define parent_class gimp_mandala_parent_class
+
+
+static void
+gimp_mandala_class_init (GimpMandalaClass *klass)
+{
+ GObjectClass *object_class = G_OBJECT_CLASS (klass);
+ GimpSymmetryClass *symmetry_class = GIMP_SYMMETRY_CLASS (klass);
+ GParamSpec *pspec;
+
+ object_class->constructed = gimp_mandala_constructed;
+ object_class->finalize = gimp_mandala_finalize;
+ object_class->set_property = gimp_mandala_set_property;
+ object_class->get_property = gimp_mandala_get_property;
+
+ symmetry_class->label = _("Mandala");
+ symmetry_class->update_strokes = gimp_mandala_update_strokes;
+ symmetry_class->get_transform = gimp_mandala_get_transform;
+ symmetry_class->active_changed = gimp_mandala_active_changed;
+
+ GIMP_CONFIG_PROP_DOUBLE (object_class, PROP_CENTER_X,
+ "center-x",
+ _("Center abscissa"),
+ NULL,
+ 0.0, G_MAXDOUBLE, 0.0,
+ GIMP_PARAM_STATIC_STRINGS |
+ GIMP_SYMMETRY_PARAM_GUI);
+
+ pspec = g_object_class_find_property (object_class, "center-x");
+ gegl_param_spec_set_property_key (pspec, "unit", "pixel-coordinate");
+ gegl_param_spec_set_property_key (pspec, "axis", "x");
+
+ GIMP_CONFIG_PROP_DOUBLE (object_class, PROP_CENTER_Y,
+ "center-y",
+ _("Center ordinate"),
+ NULL,
+ 0.0, G_MAXDOUBLE, 0.0,
+ GIMP_PARAM_STATIC_STRINGS |
+ GIMP_SYMMETRY_PARAM_GUI);
+
+ pspec = g_object_class_find_property (object_class, "center-y");
+ gegl_param_spec_set_property_key (pspec, "unit", "pixel-coordinate");
+ gegl_param_spec_set_property_key (pspec, "axis", "y");
+
+ GIMP_CONFIG_PROP_INT (object_class, PROP_SIZE,
+ "size",
+ _("Number of points"),
+ NULL,
+ 1, 100, 6.0,
+ GIMP_PARAM_STATIC_STRINGS |
+ GIMP_SYMMETRY_PARAM_GUI);
+
+ GIMP_CONFIG_PROP_BOOLEAN (object_class, PROP_DISABLE_TRANSFORMATION,
+ "disable-transformation",
+ _("Disable brush transform"),
+ _("Disable brush rotation"),
+ FALSE,
+ GIMP_PARAM_STATIC_STRINGS |
+ GIMP_SYMMETRY_PARAM_GUI);
+
+ GIMP_CONFIG_PROP_BOOLEAN (object_class, PROP_ENABLE_REFLECTION,
+ "enable-reflection",
+ _("Kaleidoscope"),
+ _("Reflect consecutive strokes"),
+ FALSE,
+ GIMP_PARAM_STATIC_STRINGS |
+ GIMP_SYMMETRY_PARAM_GUI);
+}
+
+static void
+gimp_mandala_init (GimpMandala *mandala)
+{
+}
+
+static void
+gimp_mandala_constructed (GObject *object)
+{
+ GimpSymmetry *sym = GIMP_SYMMETRY (object);
+
+ g_signal_connect_object (sym->image, "size-changed-detailed",
+ G_CALLBACK (gimp_mandala_image_size_changed_cb),
+ sym, 0);
+}
+
+static void
+gimp_mandala_finalize (GObject *object)
+{
+ GimpMandala *mandala = GIMP_MANDALA (object);
+
+ g_clear_object (&mandala->horizontal_guide);
+ g_clear_object (&mandala->vertical_guide);
+
+ G_OBJECT_CLASS (parent_class)->finalize (object);
+}
+
+static void
+gimp_mandala_set_property (GObject *object,
+ guint property_id,
+ const GValue *value,
+ GParamSpec *pspec)
+{
+ GimpMandala *mandala = GIMP_MANDALA (object);
+ GimpImage *image = GIMP_SYMMETRY (mandala)->image;
+
+ switch (property_id)
+ {
+ case PROP_CENTER_X:
+ if (g_value_get_double (value) > 0.0 &&
+ g_value_get_double (value) < (gdouble) gimp_image_get_width (image))
+ {
+ mandala->center_x = g_value_get_double (value);
+
+ if (mandala->vertical_guide)
+ {
+ g_signal_handlers_block_by_func (mandala->vertical_guide,
+ gimp_mandala_guide_position_cb,
+ mandala);
+ gimp_image_move_guide (image, mandala->vertical_guide,
+ mandala->center_x,
+ FALSE);
+ g_signal_handlers_unblock_by_func (mandala->vertical_guide,
+ gimp_mandala_guide_position_cb,
+ mandala);
+ }
+ }
+ break;
+
+ case PROP_CENTER_Y:
+ if (g_value_get_double (value) > 0.0 &&
+ g_value_get_double (value) < (gdouble) gimp_image_get_height (image))
+ {
+ mandala->center_y = g_value_get_double (value);
+
+ if (mandala->horizontal_guide)
+ {
+ g_signal_handlers_block_by_func (mandala->horizontal_guide,
+ gimp_mandala_guide_position_cb,
+ mandala);
+ gimp_image_move_guide (image, mandala->horizontal_guide,
+ mandala->center_y,
+ FALSE);
+ g_signal_handlers_unblock_by_func (mandala->horizontal_guide,
+ gimp_mandala_guide_position_cb,
+ mandala);
+ }
+ }
+ break;
+
+ case PROP_SIZE:
+ mandala->size = g_value_get_int (value);
+ break;
+
+ case PROP_DISABLE_TRANSFORMATION:
+ mandala->disable_transformation = g_value_get_boolean (value);
+ break;
+
+ case PROP_ENABLE_REFLECTION:
+ mandala->enable_reflection = g_value_get_boolean (value);
+ break;
+
+ default:
+ G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
+ break;
+ }
+}
+
+static void
+gimp_mandala_get_property (GObject *object,
+ guint property_id,
+ GValue *value,
+ GParamSpec *pspec)
+{
+ GimpMandala *mandala = GIMP_MANDALA (object);
+
+ switch (property_id)
+ {
+ case PROP_CENTER_X:
+ g_value_set_double (value, mandala->center_x);
+ break;
+ case PROP_CENTER_Y:
+ g_value_set_double (value, mandala->center_y);
+ break;
+ case PROP_SIZE:
+ g_value_set_int (value, mandala->size);
+ break;
+ case PROP_DISABLE_TRANSFORMATION:
+ g_value_set_boolean (value, mandala->disable_transformation);
+ break;
+ case PROP_ENABLE_REFLECTION:
+ g_value_set_boolean (value, mandala->enable_reflection);
+ break;
+ default:
+ G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
+ break;
+ }
+}
+
+static void
+gimp_mandala_active_changed (GimpSymmetry *sym)
+{
+ GimpMandala *mandala = GIMP_MANDALA (sym);
+
+ if (sym->active)
+ {
+ if (! mandala->horizontal_guide)
+ gimp_mandala_add_guide (mandala, GIMP_ORIENTATION_HORIZONTAL);
+
+ if (! mandala->vertical_guide)
+ gimp_mandala_add_guide (mandala, GIMP_ORIENTATION_VERTICAL);
+ }
+ else
+ {
+ if (mandala->horizontal_guide)
+ gimp_mandala_remove_guide (mandala, GIMP_ORIENTATION_HORIZONTAL);
+
+ if (mandala->vertical_guide)
+ gimp_mandala_remove_guide (mandala, GIMP_ORIENTATION_VERTICAL);
+ }
+}
+
+static void
+gimp_mandala_add_guide (GimpMandala *mandala,
+ GimpOrientationType orientation)
+{
+ GimpSymmetry *sym = GIMP_SYMMETRY (mandala);
+ GimpImage *image;
+ Gimp *gimp;
+ GimpGuide *guide;
+ gint position;
+
+ image = sym->image;
+ gimp = image->gimp;
+
+ guide = gimp_guide_custom_new (orientation,
+ gimp->next_guide_ID++,
+ GIMP_GUIDE_STYLE_MANDALA);
+
+ if (orientation == GIMP_ORIENTATION_HORIZONTAL)
+ {
+ mandala->horizontal_guide = guide;
+
+ /* Mandala guide position at first activation is at canvas middle. */
+ if (mandala->center_y < 1.0)
+ mandala->center_y = (gdouble) gimp_image_get_height (image) / 2.0;
+
+ position = (gint) mandala->center_y;
+ }
+ else
+ {
+ mandala->vertical_guide = guide;
+
+ /* Mandala guide position at first activation is at canvas middle. */
+ if (mandala->center_x < 1.0)
+ mandala->center_x = (gdouble) gimp_image_get_width (image) / 2.0;
+
+ position = (gint) mandala->center_x;
+ }
+
+ g_signal_connect (guide, "removed",
+ G_CALLBACK (gimp_mandala_guide_removed_cb),
+ mandala);
+
+ gimp_image_add_guide (image, guide, position);
+
+ g_signal_connect (guide, "notify::position",
+ G_CALLBACK (gimp_mandala_guide_position_cb),
+ mandala);
+}
+
+static void
+gimp_mandala_remove_guide (GimpMandala *mandala,
+ GimpOrientationType orientation)
+{
+ GimpSymmetry *sym = GIMP_SYMMETRY (mandala);
+ GimpImage *image;
+ GimpGuide *guide;
+
+ image = sym->image;
+ guide = (orientation == GIMP_ORIENTATION_HORIZONTAL) ?
+ mandala->horizontal_guide : mandala->vertical_guide;
+
+ g_signal_handlers_disconnect_by_func (guide,
+ gimp_mandala_guide_removed_cb,
+ mandala);
+ g_signal_handlers_disconnect_by_func (guide,
+ gimp_mandala_guide_position_cb,
+ mandala);
+
+ gimp_image_remove_guide (image, guide, FALSE);
+ g_object_unref (guide);
+
+ if (orientation == GIMP_ORIENTATION_HORIZONTAL)
+ mandala->horizontal_guide = NULL;
+ else
+ mandala->vertical_guide = NULL;
+}
+
+static void
+gimp_mandala_guide_removed_cb (GObject *object,
+ GimpMandala *mandala)
+{
+ GimpSymmetry *sym = GIMP_SYMMETRY (mandala);
+
+ g_signal_handlers_disconnect_by_func (object,
+ gimp_mandala_guide_removed_cb,
+ mandala);
+ g_signal_handlers_disconnect_by_func (object,
+ gimp_mandala_guide_position_cb,
+ mandala);
+
+ if (GIMP_GUIDE (object) == mandala->horizontal_guide)
+ {
+ g_object_unref (mandala->horizontal_guide);
+
+ mandala->horizontal_guide = NULL;
+ mandala->center_y = 0.0;
+
+ gimp_mandala_remove_guide (mandala, GIMP_ORIENTATION_VERTICAL);
+ }
+ else if (GIMP_GUIDE (object) == mandala->vertical_guide)
+ {
+ g_object_unref (mandala->vertical_guide);
+ mandala->vertical_guide = NULL;
+ mandala->center_x = 0.0;
+
+ gimp_mandala_remove_guide (mandala, GIMP_ORIENTATION_HORIZONTAL);
+ }
+
+ gimp_image_symmetry_remove (sym->image, sym);
+}
+
+static void
+gimp_mandala_guide_position_cb (GObject *object,
+ GParamSpec *pspec,
+ GimpMandala *mandala)
+{
+ GimpGuide *guide = GIMP_GUIDE (object);
+
+ if (guide == mandala->horizontal_guide)
+ {
+ g_object_set (G_OBJECT (mandala),
+ "center-y", (gdouble) gimp_guide_get_position (guide),
+ NULL);
+ }
+ else if (guide == mandala->vertical_guide)
+ {
+ g_object_set (G_OBJECT (mandala),
+ "center-x", (gdouble) gimp_guide_get_position (guide),
+ NULL);
+ }
+}
+
+static void
+gimp_mandala_update_strokes (GimpSymmetry *sym,
+ GimpDrawable *drawable,
+ GimpCoords *origin)
+{
+ GimpMandala *mandala = GIMP_MANDALA (sym);
+ GimpCoords *coords;
+ GimpMatrix3 matrix;
+ gdouble slice_angle;
+ gdouble mid_slice_angle = 0.0;
+ gdouble center_x, center_y;
+ gint offset_x, offset_y;
+ gint i;
+
+ gimp_item_get_offset (GIMP_ITEM (drawable), &offset_x, &offset_y);
+
+ center_x = mandala->center_x - offset_x;
+ center_y = mandala->center_y - offset_y;
+
+ g_list_free_full (sym->strokes, g_free);
+ sym->strokes = NULL;
+
+ coords = g_memdup (sym->origin, sizeof (GimpCoords));
+ sym->strokes = g_list_prepend (sym->strokes, coords);
+
+ /* The angle of each slice, in radians. */
+ slice_angle = 2.0 * G_PI / mandala->size;
+
+ if (mandala->enable_reflection)
+ {
+ /* Find out in which slice the user is currently drawing. */
+ gdouble angle = atan2 (sym->origin->y - center_y,
+ sym->origin->x - center_x);
+ gint slice_no = (int) floor(angle/slice_angle);
+
+ /* Angle where the middle of that slice is. */
+ mid_slice_angle = slice_no * slice_angle + slice_angle / 2.0;
+ }
+
+ for (i = 1; i < mandala->size; i++)
+ {
+ gdouble new_x, new_y;
+
+ coords = g_memdup (sym->origin, sizeof (GimpCoords));
+ gimp_matrix3_identity (&matrix);
+ gimp_matrix3_translate (&matrix,
+ -center_x,
+ -center_y);
+ if (mandala->enable_reflection && i % 2 == 1)
+ {
+ /* Reflecting over the mid_slice_angle axis, reflects slice without changing position. */
+ gimp_matrix3_rotate(&matrix, -mid_slice_angle);
+ gimp_matrix3_scale (&matrix, 1, -1);
+ gimp_matrix3_rotate(&matrix, mid_slice_angle - i * slice_angle);
+ }
+ else
+ {
+ gimp_matrix3_rotate (&matrix, - i * slice_angle);
+ }
+ gimp_matrix3_translate (&matrix,
+ +center_x,
+ +center_y);
+ gimp_matrix3_transform_point (&matrix,
+ coords->x,
+ coords->y,
+ &new_x,
+ &new_y);
+ coords->x = new_x;
+ coords->y = new_y;
+ sym->strokes = g_list_prepend (sym->strokes, coords);
+ }
+
+ sym->strokes = g_list_reverse (sym->strokes);
+
+ g_signal_emit_by_name (sym, "strokes-updated", sym->image);
+}
+
+static void
+gimp_mandala_get_transform (GimpSymmetry *sym,
+ gint stroke,
+ gdouble *angle,
+ gboolean *reflect)
+{
+ GimpMandala *mandala = GIMP_MANDALA (sym);
+ gdouble slice_angle;
+
+ if (mandala->disable_transformation)
+ return;
+
+ slice_angle = 360.0 / mandala->size;
+
+ if (mandala->enable_reflection && stroke % 2 == 1)
+ {
+ /* Find out in which slice the user is currently drawing. */
+ gdouble origin_angle = gimp_rad_to_deg (atan2 (sym->origin->y - mandala->center_y,
+ sym->origin->x - mandala->center_x));
+ gint slice_no = (int) floor(origin_angle/slice_angle);
+
+ /* Angle where the middle of that slice is. */
+ gdouble mid_slice_angle = slice_no * slice_angle + slice_angle / 2.0;
+
+ *angle = 180.0 - (-2 * mid_slice_angle + stroke * slice_angle) ;
+ *reflect = TRUE;
+ }
+ else
+ {
+ *angle = stroke * slice_angle;
+ }
+}
+
+static void
+gimp_mandala_image_size_changed_cb (GimpImage *image,
+ gint previous_origin_x,
+ gint previous_origin_y,
+ gint previous_width,
+ gint previous_height,
+ GimpSymmetry *sym)
+{
+ if (previous_width != gimp_image_get_width (image) ||
+ previous_height != gimp_image_get_height (image))
+ {
+ g_signal_emit_by_name (sym, "gui-param-changed", sym->image);
+ }
+}