744 lines
25 KiB
C
744 lines
25 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-mirror.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 "core-types.h"
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#include "pika.h"
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#include "pika-cairo.h"
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#include "pikabrush.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-mirror.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_HORIZONTAL_SYMMETRY,
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PROP_VERTICAL_SYMMETRY,
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PROP_POINT_SYMMETRY,
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PROP_DISABLE_TRANSFORMATION,
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PROP_MIRROR_POSITION_X,
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PROP_MIRROR_POSITION_Y
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};
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/* Local function prototypes */
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static void pika_mirror_constructed (GObject *object);
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static void pika_mirror_finalize (GObject *object);
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static void pika_mirror_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_mirror_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_mirror_update_strokes (PikaSymmetry *mirror,
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PikaDrawable *drawable,
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PikaCoords *origin);
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static void pika_mirror_get_transform (PikaSymmetry *mirror,
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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_mirror_reset (PikaMirror *mirror);
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static void pika_mirror_add_guide (PikaMirror *mirror,
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PikaOrientationType orientation);
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static void pika_mirror_remove_guide (PikaMirror *mirror,
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PikaOrientationType orientation);
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static void pika_mirror_guide_removed_cb (GObject *object,
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PikaMirror *mirror);
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static void pika_mirror_guide_position_cb (GObject *object,
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GParamSpec *pspec,
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PikaMirror *mirror);
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static void pika_mirror_active_changed (PikaSymmetry *sym);
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static void pika_mirror_set_horizontal_symmetry (PikaMirror *mirror,
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gboolean active);
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static void pika_mirror_set_vertical_symmetry (PikaMirror *mirror,
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gboolean active);
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static void pika_mirror_set_point_symmetry (PikaMirror *mirror,
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gboolean active);
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static void pika_mirror_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 (PikaMirror, pika_mirror, PIKA_TYPE_SYMMETRY)
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#define parent_class pika_mirror_parent_class
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static void
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pika_mirror_class_init (PikaMirrorClass *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_mirror_constructed;
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object_class->finalize = pika_mirror_finalize;
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object_class->set_property = pika_mirror_set_property;
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object_class->get_property = pika_mirror_get_property;
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symmetry_class->label = _("Mirror");
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symmetry_class->update_strokes = pika_mirror_update_strokes;
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symmetry_class->get_transform = pika_mirror_get_transform;
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symmetry_class->active_changed = pika_mirror_active_changed;
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PIKA_CONFIG_PROP_BOOLEAN (object_class, PROP_HORIZONTAL_SYMMETRY,
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"horizontal-symmetry",
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_("Horizontal Symmetry"),
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_("Reflect the initial stroke across a horizontal axis"),
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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_VERTICAL_SYMMETRY,
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"vertical-symmetry",
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_("Vertical Symmetry"),
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_("Reflect the initial stroke across a vertical axis"),
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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_POINT_SYMMETRY,
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"point-symmetry",
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_("Central Symmetry"),
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_("Invert the initial stroke through a point"),
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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_DISABLE_TRANSFORMATION,
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"disable-transformation",
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_("Disable brush transform"),
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_("Disable brush reflection"),
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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_DOUBLE (object_class, PROP_MIRROR_POSITION_X,
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"mirror-position-x",
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_("Vertical axis position"),
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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, "mirror-position-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_MIRROR_POSITION_Y,
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"mirror-position-y",
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_("Horizontal axis position"),
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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, "mirror-position-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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}
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static void
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pika_mirror_init (PikaMirror *mirror)
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{
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}
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static void
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pika_mirror_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_mirror_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_mirror_finalize (GObject *object)
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{
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PikaMirror *mirror = PIKA_MIRROR (object);
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g_clear_object (&mirror->horizontal_guide);
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g_clear_object (&mirror->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_mirror_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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PikaMirror *mirror = PIKA_MIRROR (object);
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PikaImage *image = PIKA_SYMMETRY (mirror)->image;
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switch (property_id)
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{
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case PROP_HORIZONTAL_SYMMETRY:
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pika_mirror_set_horizontal_symmetry (mirror,
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g_value_get_boolean (value));
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break;
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case PROP_VERTICAL_SYMMETRY:
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pika_mirror_set_vertical_symmetry (mirror,
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g_value_get_boolean (value));
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break;
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case PROP_POINT_SYMMETRY:
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pika_mirror_set_point_symmetry (mirror,
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g_value_get_boolean (value));
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break;
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case PROP_DISABLE_TRANSFORMATION:
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mirror->disable_transformation = g_value_get_boolean (value);
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break;
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case PROP_MIRROR_POSITION_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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mirror->mirror_position_x = g_value_get_double (value);
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if (mirror->vertical_guide)
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{
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g_signal_handlers_block_by_func (mirror->vertical_guide,
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pika_mirror_guide_position_cb,
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mirror);
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pika_image_move_guide (image, mirror->vertical_guide,
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mirror->mirror_position_x,
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FALSE);
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g_signal_handlers_unblock_by_func (mirror->vertical_guide,
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pika_mirror_guide_position_cb,
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mirror);
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}
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}
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break;
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case PROP_MIRROR_POSITION_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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mirror->mirror_position_y = g_value_get_double (value);
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if (mirror->horizontal_guide)
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{
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g_signal_handlers_block_by_func (mirror->horizontal_guide,
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pika_mirror_guide_position_cb,
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mirror);
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pika_image_move_guide (image, mirror->horizontal_guide,
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mirror->mirror_position_y,
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FALSE);
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g_signal_handlers_unblock_by_func (mirror->horizontal_guide,
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pika_mirror_guide_position_cb,
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mirror);
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}
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}
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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_mirror_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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PikaMirror *mirror = PIKA_MIRROR (object);
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switch (property_id)
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{
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case PROP_HORIZONTAL_SYMMETRY:
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g_value_set_boolean (value, mirror->horizontal_mirror);
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break;
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case PROP_VERTICAL_SYMMETRY:
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g_value_set_boolean (value, mirror->vertical_mirror);
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break;
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case PROP_POINT_SYMMETRY:
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g_value_set_boolean (value, mirror->point_symmetry);
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break;
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case PROP_DISABLE_TRANSFORMATION:
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g_value_set_boolean (value, mirror->disable_transformation);
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break;
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case PROP_MIRROR_POSITION_X:
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g_value_set_double (value, mirror->mirror_position_x);
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break;
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case PROP_MIRROR_POSITION_Y:
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g_value_set_double (value, mirror->mirror_position_y);
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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_mirror_update_strokes (PikaSymmetry *sym,
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PikaDrawable *drawable,
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PikaCoords *origin)
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{
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PikaMirror *mirror = PIKA_MIRROR (sym);
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GList *strokes = NULL;
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PikaCoords *coords;
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gdouble mirror_position_x, mirror_position_y;
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gint offset_x, offset_y;
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pika_item_get_offset (PIKA_ITEM (drawable), &offset_x, &offset_y);
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mirror_position_x = mirror->mirror_position_x - offset_x;
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mirror_position_y = mirror->mirror_position_y - offset_y;
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g_list_free_full (sym->strokes, g_free);
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strokes = g_list_prepend (strokes,
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g_memdup2 (origin, sizeof (PikaCoords)));
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if (mirror->horizontal_mirror)
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{
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coords = g_memdup2 (origin, sizeof (PikaCoords));
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coords->y = 2.0 * mirror_position_y - origin->y;
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strokes = g_list_prepend (strokes, coords);
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}
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if (mirror->vertical_mirror)
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{
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coords = g_memdup2 (origin, sizeof (PikaCoords));
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coords->x = 2.0 * mirror_position_x - origin->x;
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strokes = g_list_prepend (strokes, coords);
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}
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if (mirror->point_symmetry)
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{
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coords = g_memdup2 (origin, sizeof (PikaCoords));
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coords->x = 2.0 * mirror_position_x - origin->x;
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coords->y = 2.0 * mirror_position_y - origin->y;
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strokes = g_list_prepend (strokes, coords);
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}
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sym->strokes = g_list_reverse (strokes);
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g_signal_emit_by_name (sym, "strokes-updated", sym->image);
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}
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static void
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pika_mirror_get_transform (PikaSymmetry *sym,
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gint stroke,
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gdouble *angle,
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gboolean *reflect)
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{
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PikaMirror *mirror = PIKA_MIRROR (sym);
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if (mirror->disable_transformation)
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return;
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if (! mirror->horizontal_mirror && stroke >= 1)
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stroke++;
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if (! mirror->vertical_mirror && stroke >= 2)
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stroke++;
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switch (stroke)
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{
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/* original */
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case 0:
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break;
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/* horizontal */
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case 1:
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*angle = 180.0;
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*reflect = TRUE;
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break;
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/* vertical */
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case 2:
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*reflect = TRUE;
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break;
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/* central */
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case 3:
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*angle = 180.0;
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break;
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default:
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g_return_if_reached ();
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}
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}
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static void
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pika_mirror_reset (PikaMirror *mirror)
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{
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PikaSymmetry *sym = PIKA_SYMMETRY (mirror);
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if (sym->origin)
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{
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pika_symmetry_set_origin (sym, sym->drawable,
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sym->origin);
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}
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}
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static void
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pika_mirror_add_guide (PikaMirror *mirror,
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PikaOrientationType orientation)
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{
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PikaSymmetry *sym = PIKA_SYMMETRY (mirror);
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PikaImage *image;
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Pika *pika;
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PikaGuide *guide;
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gdouble 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_MIRROR);
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if (orientation == PIKA_ORIENTATION_HORIZONTAL)
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{
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/* Mirror guide position at first activation is at canvas middle. */
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if (mirror->mirror_position_y < 1.0)
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position = pika_image_get_height (image) / 2.0;
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else
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position = mirror->mirror_position_y;
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g_object_set (mirror,
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"mirror-position-y", position,
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NULL);
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mirror->horizontal_guide = guide;
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}
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else
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{
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/* Mirror guide position at first activation is at canvas middle. */
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if (mirror->mirror_position_x < 1.0)
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position = pika_image_get_width (image) / 2.0;
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else
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position = mirror->mirror_position_x;
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g_object_set (mirror,
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"mirror-position-x", position,
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NULL);
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mirror->vertical_guide = guide;
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}
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g_signal_connect (guide, "removed",
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G_CALLBACK (pika_mirror_guide_removed_cb),
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mirror);
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pika_image_add_guide (image, guide, (gint) position);
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g_signal_connect (guide, "notify::position",
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G_CALLBACK (pika_mirror_guide_position_cb),
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mirror);
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}
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static void
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pika_mirror_remove_guide (PikaMirror *mirror,
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PikaOrientationType orientation)
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{
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PikaSymmetry *sym = PIKA_SYMMETRY (mirror);
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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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mirror->horizontal_guide : mirror->vertical_guide;
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/* The guide may have already been removed, for instance from GUI. */
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if (guide)
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{
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g_signal_handlers_disconnect_by_func (G_OBJECT (guide),
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pika_mirror_guide_removed_cb,
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mirror);
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g_signal_handlers_disconnect_by_func (G_OBJECT (guide),
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pika_mirror_guide_position_cb,
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mirror);
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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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mirror->horizontal_guide = NULL;
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else
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mirror->vertical_guide = NULL;
|
|
}
|
|
}
|
|
|
|
static void
|
|
pika_mirror_guide_removed_cb (GObject *object,
|
|
PikaMirror *mirror)
|
|
{
|
|
PikaSymmetry *symmetry = PIKA_SYMMETRY (mirror);
|
|
|
|
g_signal_handlers_disconnect_by_func (object,
|
|
pika_mirror_guide_removed_cb,
|
|
mirror);
|
|
g_signal_handlers_disconnect_by_func (object,
|
|
pika_mirror_guide_position_cb,
|
|
mirror);
|
|
|
|
if (PIKA_GUIDE (object) == mirror->horizontal_guide)
|
|
{
|
|
g_object_unref (mirror->horizontal_guide);
|
|
mirror->horizontal_guide = NULL;
|
|
|
|
g_object_set (mirror,
|
|
"horizontal-symmetry", FALSE,
|
|
NULL);
|
|
g_object_set (mirror,
|
|
"point-symmetry", FALSE,
|
|
NULL);
|
|
g_object_set (mirror,
|
|
"mirror-position-y", 0.0,
|
|
NULL);
|
|
|
|
if (mirror->vertical_guide &&
|
|
! mirror->vertical_mirror)
|
|
{
|
|
g_signal_handlers_disconnect_by_func (G_OBJECT (mirror->vertical_guide),
|
|
pika_mirror_guide_removed_cb,
|
|
mirror);
|
|
g_signal_handlers_disconnect_by_func (G_OBJECT (mirror->vertical_guide),
|
|
pika_mirror_guide_position_cb,
|
|
mirror);
|
|
|
|
pika_image_remove_guide (symmetry->image,
|
|
mirror->vertical_guide,
|
|
FALSE);
|
|
g_clear_object (&mirror->vertical_guide);
|
|
}
|
|
}
|
|
else if (PIKA_GUIDE (object) == mirror->vertical_guide)
|
|
{
|
|
g_object_unref (mirror->vertical_guide);
|
|
mirror->vertical_guide = NULL;
|
|
|
|
g_object_set (mirror,
|
|
"vertical-symmetry", FALSE,
|
|
NULL);
|
|
g_object_set (mirror,
|
|
"point-symmetry", FALSE,
|
|
NULL);
|
|
g_object_set (mirror,
|
|
"mirror-position-x", 0.0,
|
|
NULL);
|
|
|
|
if (mirror->horizontal_guide &&
|
|
! mirror->horizontal_mirror)
|
|
{
|
|
g_signal_handlers_disconnect_by_func (G_OBJECT (mirror->horizontal_guide),
|
|
pika_mirror_guide_removed_cb,
|
|
mirror);
|
|
g_signal_handlers_disconnect_by_func (G_OBJECT (mirror->horizontal_guide),
|
|
pika_mirror_guide_position_cb,
|
|
mirror);
|
|
|
|
pika_image_remove_guide (symmetry->image,
|
|
mirror->horizontal_guide,
|
|
FALSE);
|
|
g_clear_object (&mirror->horizontal_guide);
|
|
}
|
|
}
|
|
|
|
if (mirror->horizontal_guide == NULL &&
|
|
mirror->vertical_guide == NULL)
|
|
{
|
|
pika_image_symmetry_remove (symmetry->image,
|
|
PIKA_SYMMETRY (mirror));
|
|
}
|
|
else
|
|
{
|
|
pika_mirror_reset (mirror);
|
|
g_signal_emit_by_name (mirror, "gui-param-changed",
|
|
PIKA_SYMMETRY (mirror)->image);
|
|
}
|
|
}
|
|
|
|
static void
|
|
pika_mirror_guide_position_cb (GObject *object,
|
|
GParamSpec *pspec,
|
|
PikaMirror *mirror)
|
|
{
|
|
PikaGuide *guide = PIKA_GUIDE (object);
|
|
|
|
if (guide == mirror->horizontal_guide)
|
|
{
|
|
g_object_set (mirror,
|
|
"mirror-position-y", (gdouble) pika_guide_get_position (guide),
|
|
NULL);
|
|
}
|
|
else if (guide == mirror->vertical_guide)
|
|
{
|
|
g_object_set (mirror,
|
|
"mirror-position-x", (gdouble) pika_guide_get_position (guide),
|
|
NULL);
|
|
}
|
|
}
|
|
|
|
static void
|
|
pika_mirror_active_changed (PikaSymmetry *sym)
|
|
{
|
|
PikaMirror *mirror = PIKA_MIRROR (sym);
|
|
|
|
if (sym->active)
|
|
{
|
|
if ((mirror->horizontal_mirror || mirror->point_symmetry) &&
|
|
! mirror->horizontal_guide)
|
|
pika_mirror_add_guide (mirror, PIKA_ORIENTATION_HORIZONTAL);
|
|
|
|
if ((mirror->vertical_mirror || mirror->point_symmetry) &&
|
|
! mirror->vertical_guide)
|
|
pika_mirror_add_guide (mirror, PIKA_ORIENTATION_VERTICAL);
|
|
}
|
|
else
|
|
{
|
|
if (mirror->horizontal_guide)
|
|
pika_mirror_remove_guide (mirror, PIKA_ORIENTATION_HORIZONTAL);
|
|
|
|
if (mirror->vertical_guide)
|
|
pika_mirror_remove_guide (mirror, PIKA_ORIENTATION_VERTICAL);
|
|
}
|
|
}
|
|
|
|
static void
|
|
pika_mirror_set_horizontal_symmetry (PikaMirror *mirror,
|
|
gboolean active)
|
|
{
|
|
if (active == mirror->horizontal_mirror)
|
|
return;
|
|
|
|
mirror->horizontal_mirror = active;
|
|
|
|
if (active)
|
|
{
|
|
if (! mirror->horizontal_guide)
|
|
pika_mirror_add_guide (mirror, PIKA_ORIENTATION_HORIZONTAL);
|
|
}
|
|
else if (! mirror->point_symmetry)
|
|
{
|
|
pika_mirror_remove_guide (mirror, PIKA_ORIENTATION_HORIZONTAL);
|
|
}
|
|
|
|
pika_mirror_reset (mirror);
|
|
}
|
|
|
|
static void
|
|
pika_mirror_set_vertical_symmetry (PikaMirror *mirror,
|
|
gboolean active)
|
|
{
|
|
if (active == mirror->vertical_mirror)
|
|
return;
|
|
|
|
mirror->vertical_mirror = active;
|
|
|
|
if (active)
|
|
{
|
|
if (! mirror->vertical_guide)
|
|
pika_mirror_add_guide (mirror, PIKA_ORIENTATION_VERTICAL);
|
|
}
|
|
else if (! mirror->point_symmetry)
|
|
{
|
|
pika_mirror_remove_guide (mirror, PIKA_ORIENTATION_VERTICAL);
|
|
}
|
|
|
|
pika_mirror_reset (mirror);
|
|
}
|
|
|
|
static void
|
|
pika_mirror_set_point_symmetry (PikaMirror *mirror,
|
|
gboolean active)
|
|
{
|
|
if (active == mirror->point_symmetry)
|
|
return;
|
|
|
|
mirror->point_symmetry = active;
|
|
|
|
if (active)
|
|
{
|
|
/* Show the horizontal guide unless already shown */
|
|
if (! mirror->horizontal_guide)
|
|
pika_mirror_add_guide (mirror, PIKA_ORIENTATION_HORIZONTAL);
|
|
|
|
/* Show the vertical guide unless already shown */
|
|
if (! mirror->vertical_guide)
|
|
pika_mirror_add_guide (mirror, PIKA_ORIENTATION_VERTICAL);
|
|
}
|
|
else
|
|
{
|
|
/* Remove the horizontal guide unless needed by horizontal mirror */
|
|
if (! mirror->horizontal_mirror)
|
|
pika_mirror_remove_guide (mirror, PIKA_ORIENTATION_HORIZONTAL);
|
|
|
|
/* Remove the vertical guide unless needed by vertical mirror */
|
|
if (! mirror->vertical_mirror)
|
|
pika_mirror_remove_guide (mirror, PIKA_ORIENTATION_VERTICAL);
|
|
}
|
|
|
|
pika_mirror_reset (mirror);
|
|
}
|
|
|
|
static void
|
|
pika_mirror_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);
|
|
}
|
|
}
|
