580 lines
20 KiB
C
580 lines
20 KiB
C
/* PIKA - Photo and Image Kooker Application
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* a rebranding of The GNU Image Manipulation Program (created with heckimp)
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* A derived work which may be trivial. However, any changes may be (C)2023 by Aldercone Studio
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*
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* Original copyright, applying to most contents (license remains unchanged):
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* Copyright (C) 1995 Spencer Kimball and Peter Mattis
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*
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* pikasymmetry-mandala.c
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* Copyright (C) 2015 Jehan <jehan@gimp.org>
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <https://www.gnu.org/licenses/>.
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*/
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#include "config.h"
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#include <string.h>
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#include <cairo.h>
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#include <gegl.h>
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#include <gdk-pixbuf/gdk-pixbuf.h>
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#include "libpikabase/pikabase.h"
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#include "libpikaconfig/pikaconfig.h"
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#include "libpikamath/pikamath.h"
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#include "core-types.h"
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#include "pika.h"
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#include "pika-cairo.h"
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#include "pikadrawable.h"
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#include "pikaguide.h"
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#include "pikaimage.h"
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#include "pikaimage-guides.h"
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#include "pikaimage-symmetry.h"
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#include "pikaitem.h"
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#include "pikasymmetry-mandala.h"
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#include "pika-intl.h"
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enum
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{
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PROP_0,
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PROP_CENTER_X,
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PROP_CENTER_Y,
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PROP_SIZE,
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PROP_DISABLE_TRANSFORMATION,
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PROP_ENABLE_REFLECTION,
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};
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/* Local function prototypes */
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static void pika_mandala_constructed (GObject *object);
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static void pika_mandala_finalize (GObject *object);
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static void pika_mandala_set_property (GObject *object,
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guint property_id,
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const GValue *value,
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GParamSpec *pspec);
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static void pika_mandala_get_property (GObject *object,
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guint property_id,
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GValue *value,
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GParamSpec *pspec);
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static void pika_mandala_active_changed (PikaSymmetry *sym);
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static void pika_mandala_add_guide (PikaMandala *mandala,
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PikaOrientationType orientation);
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static void pika_mandala_remove_guide (PikaMandala *mandala,
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PikaOrientationType orientation);
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static void pika_mandala_guide_removed_cb (GObject *object,
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PikaMandala *mandala);
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static void pika_mandala_guide_position_cb (GObject *object,
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GParamSpec *pspec,
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PikaMandala *mandala);
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static void pika_mandala_update_strokes (PikaSymmetry *mandala,
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PikaDrawable *drawable,
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PikaCoords *origin);
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static void pika_mandala_get_transform (PikaSymmetry *mandala,
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gint stroke,
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gdouble *angle,
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gboolean *reflect);
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static void pika_mandala_image_size_changed_cb (PikaImage *image,
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gint previous_origin_x,
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gint previous_origin_y,
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gint previous_width,
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gint previous_height,
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PikaSymmetry *sym);
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G_DEFINE_TYPE (PikaMandala, pika_mandala, PIKA_TYPE_SYMMETRY)
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#define parent_class pika_mandala_parent_class
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static void
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pika_mandala_class_init (PikaMandalaClass *klass)
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{
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GObjectClass *object_class = G_OBJECT_CLASS (klass);
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PikaSymmetryClass *symmetry_class = PIKA_SYMMETRY_CLASS (klass);
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GParamSpec *pspec;
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object_class->constructed = pika_mandala_constructed;
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object_class->finalize = pika_mandala_finalize;
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object_class->set_property = pika_mandala_set_property;
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object_class->get_property = pika_mandala_get_property;
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symmetry_class->label = _("Mandala");
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symmetry_class->update_strokes = pika_mandala_update_strokes;
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symmetry_class->get_transform = pika_mandala_get_transform;
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symmetry_class->active_changed = pika_mandala_active_changed;
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PIKA_CONFIG_PROP_DOUBLE (object_class, PROP_CENTER_X,
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"center-x",
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_("Center abscissa"),
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NULL,
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0.0, G_MAXDOUBLE, 0.0,
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PIKA_PARAM_STATIC_STRINGS |
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PIKA_SYMMETRY_PARAM_GUI);
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pspec = g_object_class_find_property (object_class, "center-x");
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gegl_param_spec_set_property_key (pspec, "unit", "pixel-coordinate");
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gegl_param_spec_set_property_key (pspec, "axis", "x");
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PIKA_CONFIG_PROP_DOUBLE (object_class, PROP_CENTER_Y,
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"center-y",
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_("Center ordinate"),
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NULL,
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0.0, G_MAXDOUBLE, 0.0,
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PIKA_PARAM_STATIC_STRINGS |
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PIKA_SYMMETRY_PARAM_GUI);
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pspec = g_object_class_find_property (object_class, "center-y");
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gegl_param_spec_set_property_key (pspec, "unit", "pixel-coordinate");
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gegl_param_spec_set_property_key (pspec, "axis", "y");
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PIKA_CONFIG_PROP_INT (object_class, PROP_SIZE,
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"size",
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_("Number of points"),
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NULL,
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1, 100, 6.0,
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PIKA_PARAM_STATIC_STRINGS |
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PIKA_SYMMETRY_PARAM_GUI);
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PIKA_CONFIG_PROP_BOOLEAN (object_class, PROP_DISABLE_TRANSFORMATION,
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"disable-transformation",
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_("Disable brush transform"),
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_("Disable brush rotation"),
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FALSE,
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PIKA_PARAM_STATIC_STRINGS |
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PIKA_SYMMETRY_PARAM_GUI);
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PIKA_CONFIG_PROP_BOOLEAN (object_class, PROP_ENABLE_REFLECTION,
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"enable-reflection",
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_("Kaleidoscope"),
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_("Reflect consecutive strokes"),
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FALSE,
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PIKA_PARAM_STATIC_STRINGS |
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PIKA_SYMMETRY_PARAM_GUI);
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}
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static void
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pika_mandala_init (PikaMandala *mandala)
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{
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}
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static void
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pika_mandala_constructed (GObject *object)
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{
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PikaSymmetry *sym = PIKA_SYMMETRY (object);
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g_signal_connect_object (sym->image, "size-changed-detailed",
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G_CALLBACK (pika_mandala_image_size_changed_cb),
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sym, 0);
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}
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static void
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pika_mandala_finalize (GObject *object)
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{
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PikaMandala *mandala = PIKA_MANDALA (object);
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g_clear_object (&mandala->horizontal_guide);
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g_clear_object (&mandala->vertical_guide);
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G_OBJECT_CLASS (parent_class)->finalize (object);
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}
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static void
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pika_mandala_set_property (GObject *object,
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guint property_id,
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const GValue *value,
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GParamSpec *pspec)
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{
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PikaMandala *mandala = PIKA_MANDALA (object);
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PikaImage *image = PIKA_SYMMETRY (mandala)->image;
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switch (property_id)
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{
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case PROP_CENTER_X:
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if (g_value_get_double (value) > 0.0 &&
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g_value_get_double (value) < (gdouble) pika_image_get_width (image))
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{
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mandala->center_x = g_value_get_double (value);
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if (mandala->vertical_guide)
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{
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g_signal_handlers_block_by_func (mandala->vertical_guide,
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pika_mandala_guide_position_cb,
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mandala);
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pika_image_move_guide (image, mandala->vertical_guide,
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mandala->center_x,
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FALSE);
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g_signal_handlers_unblock_by_func (mandala->vertical_guide,
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pika_mandala_guide_position_cb,
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mandala);
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}
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}
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break;
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case PROP_CENTER_Y:
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if (g_value_get_double (value) > 0.0 &&
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g_value_get_double (value) < (gdouble) pika_image_get_height (image))
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{
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mandala->center_y = g_value_get_double (value);
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if (mandala->horizontal_guide)
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{
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g_signal_handlers_block_by_func (mandala->horizontal_guide,
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pika_mandala_guide_position_cb,
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mandala);
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pika_image_move_guide (image, mandala->horizontal_guide,
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mandala->center_y,
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FALSE);
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g_signal_handlers_unblock_by_func (mandala->horizontal_guide,
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pika_mandala_guide_position_cb,
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mandala);
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}
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}
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break;
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case PROP_SIZE:
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mandala->size = g_value_get_int (value);
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break;
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case PROP_DISABLE_TRANSFORMATION:
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mandala->disable_transformation = g_value_get_boolean (value);
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break;
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case PROP_ENABLE_REFLECTION:
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mandala->enable_reflection = g_value_get_boolean (value);
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break;
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default:
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G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
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break;
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}
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}
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static void
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pika_mandala_get_property (GObject *object,
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guint property_id,
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GValue *value,
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GParamSpec *pspec)
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{
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PikaMandala *mandala = PIKA_MANDALA (object);
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switch (property_id)
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{
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case PROP_CENTER_X:
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g_value_set_double (value, mandala->center_x);
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break;
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case PROP_CENTER_Y:
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g_value_set_double (value, mandala->center_y);
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break;
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case PROP_SIZE:
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g_value_set_int (value, mandala->size);
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break;
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case PROP_DISABLE_TRANSFORMATION:
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g_value_set_boolean (value, mandala->disable_transformation);
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break;
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case PROP_ENABLE_REFLECTION:
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g_value_set_boolean (value, mandala->enable_reflection);
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break;
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default:
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G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
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break;
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}
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}
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static void
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pika_mandala_active_changed (PikaSymmetry *sym)
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{
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PikaMandala *mandala = PIKA_MANDALA (sym);
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if (sym->active)
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{
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if (! mandala->horizontal_guide)
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pika_mandala_add_guide (mandala, PIKA_ORIENTATION_HORIZONTAL);
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if (! mandala->vertical_guide)
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pika_mandala_add_guide (mandala, PIKA_ORIENTATION_VERTICAL);
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}
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else
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{
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if (mandala->horizontal_guide)
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pika_mandala_remove_guide (mandala, PIKA_ORIENTATION_HORIZONTAL);
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if (mandala->vertical_guide)
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pika_mandala_remove_guide (mandala, PIKA_ORIENTATION_VERTICAL);
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}
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}
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static void
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pika_mandala_add_guide (PikaMandala *mandala,
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PikaOrientationType orientation)
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{
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PikaSymmetry *sym = PIKA_SYMMETRY (mandala);
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PikaImage *image;
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Pika *pika;
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PikaGuide *guide;
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gint position;
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image = sym->image;
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pika = image->pika;
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guide = pika_guide_custom_new (orientation,
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pika->next_guide_id++,
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PIKA_GUIDE_STYLE_MANDALA);
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if (orientation == PIKA_ORIENTATION_HORIZONTAL)
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{
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mandala->horizontal_guide = guide;
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/* Mandala guide position at first activation is at canvas middle. */
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if (mandala->center_y < 1.0)
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mandala->center_y = (gdouble) pika_image_get_height (image) / 2.0;
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position = (gint) mandala->center_y;
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}
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else
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{
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mandala->vertical_guide = guide;
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/* Mandala guide position at first activation is at canvas middle. */
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if (mandala->center_x < 1.0)
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mandala->center_x = (gdouble) pika_image_get_width (image) / 2.0;
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position = (gint) mandala->center_x;
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}
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g_signal_connect (guide, "removed",
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G_CALLBACK (pika_mandala_guide_removed_cb),
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mandala);
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pika_image_add_guide (image, guide, position);
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g_signal_connect (guide, "notify::position",
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G_CALLBACK (pika_mandala_guide_position_cb),
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mandala);
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}
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static void
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pika_mandala_remove_guide (PikaMandala *mandala,
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PikaOrientationType orientation)
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{
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PikaSymmetry *sym = PIKA_SYMMETRY (mandala);
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PikaImage *image;
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PikaGuide *guide;
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image = sym->image;
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guide = (orientation == PIKA_ORIENTATION_HORIZONTAL) ?
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mandala->horizontal_guide : mandala->vertical_guide;
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g_signal_handlers_disconnect_by_func (guide,
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pika_mandala_guide_removed_cb,
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mandala);
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g_signal_handlers_disconnect_by_func (guide,
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pika_mandala_guide_position_cb,
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mandala);
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pika_image_remove_guide (image, guide, FALSE);
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g_object_unref (guide);
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if (orientation == PIKA_ORIENTATION_HORIZONTAL)
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mandala->horizontal_guide = NULL;
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else
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mandala->vertical_guide = NULL;
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}
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static void
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pika_mandala_guide_removed_cb (GObject *object,
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PikaMandala *mandala)
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{
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PikaSymmetry *sym = PIKA_SYMMETRY (mandala);
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g_signal_handlers_disconnect_by_func (object,
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pika_mandala_guide_removed_cb,
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mandala);
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g_signal_handlers_disconnect_by_func (object,
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pika_mandala_guide_position_cb,
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mandala);
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if (PIKA_GUIDE (object) == mandala->horizontal_guide)
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{
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g_object_unref (mandala->horizontal_guide);
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mandala->horizontal_guide = NULL;
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mandala->center_y = 0.0;
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pika_mandala_remove_guide (mandala, PIKA_ORIENTATION_VERTICAL);
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}
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else if (PIKA_GUIDE (object) == mandala->vertical_guide)
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{
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g_object_unref (mandala->vertical_guide);
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mandala->vertical_guide = NULL;
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mandala->center_x = 0.0;
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pika_mandala_remove_guide (mandala, PIKA_ORIENTATION_HORIZONTAL);
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}
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pika_image_symmetry_remove (sym->image, sym);
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}
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static void
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pika_mandala_guide_position_cb (GObject *object,
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GParamSpec *pspec,
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PikaMandala *mandala)
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{
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PikaGuide *guide = PIKA_GUIDE (object);
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if (guide == mandala->horizontal_guide)
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{
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g_object_set (G_OBJECT (mandala),
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"center-y", (gdouble) pika_guide_get_position (guide),
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NULL);
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}
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else if (guide == mandala->vertical_guide)
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{
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g_object_set (G_OBJECT (mandala),
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"center-x", (gdouble) pika_guide_get_position (guide),
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NULL);
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}
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}
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static void
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pika_mandala_update_strokes (PikaSymmetry *sym,
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PikaDrawable *drawable,
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PikaCoords *origin)
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{
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PikaMandala *mandala = PIKA_MANDALA (sym);
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PikaCoords *coords;
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PikaMatrix3 matrix;
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gdouble slice_angle;
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gdouble mid_slice_angle = 0.0;
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gdouble center_x, center_y;
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gint offset_x, offset_y;
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gint i;
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pika_item_get_offset (PIKA_ITEM (drawable), &offset_x, &offset_y);
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center_x = mandala->center_x - offset_x;
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center_y = mandala->center_y - offset_y;
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g_list_free_full (sym->strokes, g_free);
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sym->strokes = NULL;
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coords = g_memdup2 (sym->origin, sizeof (PikaCoords));
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sym->strokes = g_list_prepend (sym->strokes, coords);
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/* The angle of each slice, in radians. */
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slice_angle = 2.0 * G_PI / mandala->size;
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if (mandala->enable_reflection)
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{
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/* Find out in which slice the user is currently drawing. */
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gdouble angle = atan2 (sym->origin->y - center_y,
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sym->origin->x - center_x);
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gint slice_no = (int) floor(angle/slice_angle);
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/* Angle where the middle of that slice is. */
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mid_slice_angle = slice_no * slice_angle + slice_angle / 2.0;
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}
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for (i = 1; i < mandala->size; i++)
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{
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gdouble new_x, new_y;
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coords = g_memdup2 (sym->origin, sizeof (PikaCoords));
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pika_matrix3_identity (&matrix);
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pika_matrix3_translate (&matrix,
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-center_x,
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-center_y);
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if (mandala->enable_reflection && i % 2 == 1)
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{
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/* Reflecting over the mid_slice_angle axis, reflects slice without changing position. */
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pika_matrix3_rotate(&matrix, -mid_slice_angle);
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pika_matrix3_scale (&matrix, 1, -1);
|
|
pika_matrix3_rotate(&matrix, mid_slice_angle - i * slice_angle);
|
|
}
|
|
else
|
|
{
|
|
pika_matrix3_rotate (&matrix, - i * slice_angle);
|
|
}
|
|
pika_matrix3_translate (&matrix,
|
|
+center_x,
|
|
+center_y);
|
|
pika_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
|
|
pika_mandala_get_transform (PikaSymmetry *sym,
|
|
gint stroke,
|
|
gdouble *angle,
|
|
gboolean *reflect)
|
|
{
|
|
PikaMandala *mandala = PIKA_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 = pika_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
|
|
pika_mandala_image_size_changed_cb (PikaImage *image,
|
|
gint previous_origin_x,
|
|
gint previous_origin_y,
|
|
gint previous_width,
|
|
gint previous_height,
|
|
PikaSymmetry *sym)
|
|
{
|
|
if (previous_width != pika_image_get_width (image) ||
|
|
previous_height != pika_image_get_height (image))
|
|
{
|
|
g_signal_emit_by_name (sym, "gui-param-changed", sym->image);
|
|
}
|
|
}
|
