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gimp/app/core/gimpsymmetry-mandala.c

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/* 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,
};
/* 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 GeglNode * gimp_mandala_get_operation (GimpSymmetry *mandala,
gint stroke,
gint paint_width,
gint paint_height);
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_operation = gimp_mandala_get_operation;
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);
}
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);
if (mandala->ops)
{
GList *iter;
for (iter = mandala->ops; iter; iter = g_list_next (iter))
{
if (iter->data)
g_object_unref (G_OBJECT (iter->data));
}
g_list_free (mandala->ops);
mandala->ops = NULL;
}
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;
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;
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;
gint i;
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);
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,
- mandala->center_x,
- mandala->center_y);
gimp_matrix3_rotate (&matrix, - i * 2.0 * G_PI / (gdouble) mandala->size);
gimp_matrix3_translate (&matrix,
mandala->center_x,
mandala->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 GeglNode *
gimp_mandala_get_operation (GimpSymmetry *sym,
gint stroke,
gint paint_width,
gint paint_height)
{
GimpMandala *mandala = GIMP_MANDALA (sym);
GeglNode *op = NULL;
gint i;
if (! mandala->disable_transformation &&
stroke != 0 &&
paint_width != 0 &&
paint_height != 0)
{
if (mandala->size != mandala->cached_size ||
mandala->cached_paint_width != paint_width ||
mandala->cached_paint_height != paint_height)
{
GList *iter;
if (mandala->ops)
{
for (iter = mandala->ops; iter; iter = g_list_next (iter))
{
if (iter->data)
g_object_unref (G_OBJECT (iter->data));
}
g_list_free (mandala->ops);
mandala->ops = NULL;
}
mandala->ops = g_list_prepend (mandala->ops, NULL);
for (i = 1; i < mandala->size; i++)
{
op = gegl_node_new_child (NULL,
"operation", "gegl:rotate",
"origin-x",
(gdouble) paint_width / 2.0,
"origin-y",
(gdouble) paint_height / 2.0,
"degrees",
i * 360.0 / (gdouble) mandala->size,
NULL);
mandala->ops = g_list_prepend (mandala->ops, op);
}
mandala->ops = g_list_reverse (mandala->ops);
mandala->cached_size = mandala->size;
mandala->cached_paint_width = paint_width;
mandala->cached_paint_height = paint_height;
}
op = g_list_nth_data (mandala->ops, stroke);
}
return op;
}
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);
}
}
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