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gimp/app/core/gimpsymmetry-mirror.c

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/* GIMP - The GNU Image Manipulation Program
* Copyright (C) 1995 Spencer Kimball and Peter Mattis
*
* gimpsymmetry-mirror.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 <http://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 "core-types.h"
#include "gimp.h"
#include "gimp-cairo.h"
#include "gimpbrush.h"
#include "gimpguide.h"
#include "gimpimage.h"
#include "gimpimage-guides.h"
#include "gimpimage-symmetry.h"
#include "gimpitem.h"
#include "gimpsymmetry-mirror.h"
#include "gimp-intl.h"
enum
{
PROP_0,
PROP_HORIZONTAL_SYMMETRY,
PROP_VERTICAL_SYMMETRY,
PROP_POINT_SYMMETRY,
PROP_DISABLE_TRANSFORMATION,
PROP_MIRROR_POSITION_X,
PROP_MIRROR_POSITION_Y
};
/* Local function prototypes */
static void gimp_mirror_constructed (GObject *object);
static void gimp_mirror_finalize (GObject *object);
static void gimp_mirror_set_property (GObject *object,
guint property_id,
const GValue *value,
GParamSpec *pspec);
static void gimp_mirror_get_property (GObject *object,
guint property_id,
GValue *value,
GParamSpec *pspec);
static void gimp_mirror_update_strokes (GimpSymmetry *mirror,
GimpDrawable *drawable,
GimpCoords *origin);
static void gimp_mirror_prepare_operations (GimpMirror *mirror,
gint paint_width,
gint paint_height);
static GeglNode * gimp_mirror_get_operation (GimpSymmetry *mirror,
gint stroke,
gint paint_width,
gint paint_height);
static void gimp_mirror_reset (GimpMirror *mirror);
static void gimp_mirror_add_guide (GimpMirror *mirror,
GimpOrientationType orientation);
static void gimp_mirror_remove_guide (GimpMirror *mirror,
GimpOrientationType orientation);
static void gimp_mirror_guide_removed_cb (GObject *object,
GimpMirror *mirror);
static void gimp_mirror_guide_position_cb (GObject *object,
GParamSpec *pspec,
GimpMirror *mirror);
static void gimp_mirror_active_changed (GimpSymmetry *sym);
static void gimp_mirror_set_horizontal_symmetry (GimpMirror *mirror,
gboolean active);
static void gimp_mirror_set_vertical_symmetry (GimpMirror *mirror,
gboolean active);
static void gimp_mirror_set_point_symmetry (GimpMirror *mirror,
gboolean active);
static void gimp_mirror_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 (GimpMirror, gimp_mirror, GIMP_TYPE_SYMMETRY)
#define parent_class gimp_mirror_parent_class
static void
gimp_mirror_class_init (GimpMirrorClass *klass)
{
GObjectClass *object_class = G_OBJECT_CLASS (klass);
GimpSymmetryClass *symmetry_class = GIMP_SYMMETRY_CLASS (klass);
GParamSpec *pspec;
object_class->constructed = gimp_mirror_constructed;
object_class->finalize = gimp_mirror_finalize;
object_class->set_property = gimp_mirror_set_property;
object_class->get_property = gimp_mirror_get_property;
symmetry_class->label = _("Mirror");
symmetry_class->update_strokes = gimp_mirror_update_strokes;
symmetry_class->get_operation = gimp_mirror_get_operation;
symmetry_class->active_changed = gimp_mirror_active_changed;
GIMP_CONFIG_PROP_BOOLEAN (object_class, PROP_HORIZONTAL_SYMMETRY,
"horizontal-symmetry",
_("Horizontal Symmetry"),
_("Reflect the initial stroke across a horizontal axis"),
FALSE,
GIMP_PARAM_STATIC_STRINGS |
GIMP_SYMMETRY_PARAM_GUI);
GIMP_CONFIG_PROP_BOOLEAN (object_class, PROP_VERTICAL_SYMMETRY,
"vertical-symmetry",
_("Vertical Symmetry"),
_("Reflect the initial stroke across a vertical axis"),
FALSE,
GIMP_PARAM_STATIC_STRINGS |
GIMP_SYMMETRY_PARAM_GUI);
GIMP_CONFIG_PROP_BOOLEAN (object_class, PROP_POINT_SYMMETRY,
"point-symmetry",
_("Central Symmetry"),
_("Invert the initial stroke through a point"),
FALSE,
GIMP_PARAM_STATIC_STRINGS |
GIMP_SYMMETRY_PARAM_GUI);
GIMP_CONFIG_PROP_BOOLEAN (object_class, PROP_DISABLE_TRANSFORMATION,
"disable-transformation",
_("Disable brush transform"),
_("Disable brush reflection"),
FALSE,
GIMP_PARAM_STATIC_STRINGS |
GIMP_SYMMETRY_PARAM_GUI);
GIMP_CONFIG_PROP_DOUBLE (object_class, PROP_MIRROR_POSITION_X,
"mirror-position-x",
_("Vertical axis position"),
NULL,
0.0, G_MAXDOUBLE, 0.0,
GIMP_PARAM_STATIC_STRINGS |
GIMP_SYMMETRY_PARAM_GUI);
pspec = g_object_class_find_property (object_class, "mirror-position-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_MIRROR_POSITION_Y,
"mirror-position-y",
_("Horizontal axis position"),
NULL,
0.0, G_MAXDOUBLE, 0.0,
GIMP_PARAM_STATIC_STRINGS |
GIMP_SYMMETRY_PARAM_GUI);
pspec = g_object_class_find_property (object_class, "mirror-position-y");
gegl_param_spec_set_property_key (pspec, "unit", "pixel-coordinate");
gegl_param_spec_set_property_key (pspec, "axis", "y");
}
static void
gimp_mirror_init (GimpMirror *mirror)
{
}
static void
gimp_mirror_constructed (GObject *object)
{
GimpSymmetry *sym = GIMP_SYMMETRY (object);
g_signal_connect_object (sym->image, "size-changed-detailed",
G_CALLBACK (gimp_mirror_image_size_changed_cb),
sym, 0);
}
static void
gimp_mirror_finalize (GObject *object)
{
GimpMirror *mirror = GIMP_MIRROR (object);
g_clear_object (&mirror->horizontal_guide);
g_clear_object (&mirror->vertical_guide);
g_clear_object (&mirror->horizontal_op);
g_clear_object (&mirror->vertical_op);
g_clear_object (&mirror->central_op);
G_OBJECT_CLASS (parent_class)->finalize (object);
}
static void
gimp_mirror_set_property (GObject *object,
guint property_id,
const GValue *value,
GParamSpec *pspec)
{
GimpMirror *mirror = GIMP_MIRROR (object);
GimpImage *image = GIMP_SYMMETRY (mirror)->image;
switch (property_id)
{
case PROP_HORIZONTAL_SYMMETRY:
gimp_mirror_set_horizontal_symmetry (mirror,
g_value_get_boolean (value));
break;
case PROP_VERTICAL_SYMMETRY:
gimp_mirror_set_vertical_symmetry (mirror,
g_value_get_boolean (value));
break;
case PROP_POINT_SYMMETRY:
gimp_mirror_set_point_symmetry (mirror,
g_value_get_boolean (value));
break;
case PROP_DISABLE_TRANSFORMATION:
mirror->disable_transformation = g_value_get_boolean (value);
break;
case PROP_MIRROR_POSITION_X:
if (g_value_get_double (value) > 0.0 &&
g_value_get_double (value) < (gdouble) gimp_image_get_width (image))
{
mirror->mirror_position_x = g_value_get_double (value);
if (mirror->vertical_guide)
{
g_signal_handlers_block_by_func (mirror->vertical_guide,
gimp_mirror_guide_position_cb,
mirror);
gimp_image_move_guide (image, mirror->vertical_guide,
mirror->mirror_position_x,
FALSE);
g_signal_handlers_unblock_by_func (mirror->vertical_guide,
gimp_mirror_guide_position_cb,
mirror);
}
}
break;
case PROP_MIRROR_POSITION_Y:
if (g_value_get_double (value) > 0.0 &&
g_value_get_double (value) < (gdouble) gimp_image_get_height (image))
{
mirror->mirror_position_y = g_value_get_double (value);
if (mirror->horizontal_guide)
{
g_signal_handlers_block_by_func (mirror->horizontal_guide,
gimp_mirror_guide_position_cb,
mirror);
gimp_image_move_guide (image, mirror->horizontal_guide,
mirror->mirror_position_y,
FALSE);
g_signal_handlers_unblock_by_func (mirror->horizontal_guide,
gimp_mirror_guide_position_cb,
mirror);
}
}
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
break;
}
}
static void
gimp_mirror_get_property (GObject *object,
guint property_id,
GValue *value,
GParamSpec *pspec)
{
GimpMirror *mirror = GIMP_MIRROR (object);
switch (property_id)
{
case PROP_HORIZONTAL_SYMMETRY:
g_value_set_boolean (value, mirror->horizontal_mirror);
break;
case PROP_VERTICAL_SYMMETRY:
g_value_set_boolean (value, mirror->vertical_mirror);
break;
case PROP_POINT_SYMMETRY:
g_value_set_boolean (value, mirror->point_symmetry);
break;
case PROP_DISABLE_TRANSFORMATION:
g_value_set_boolean (value, mirror->disable_transformation);
break;
case PROP_MIRROR_POSITION_X:
g_value_set_double (value, mirror->mirror_position_x);
break;
case PROP_MIRROR_POSITION_Y:
g_value_set_double (value, mirror->mirror_position_y);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
break;
}
}
static void
gimp_mirror_update_strokes (GimpSymmetry *sym,
GimpDrawable *drawable,
GimpCoords *origin)
{
GimpMirror *mirror = GIMP_MIRROR (sym);
GList *strokes = NULL;
GimpCoords *coords;
g_list_free_full (sym->strokes, g_free);
strokes = g_list_prepend (strokes,
g_memdup (origin, sizeof (GimpCoords)));
if (mirror->horizontal_mirror)
{
coords = g_memdup (origin, sizeof (GimpCoords));
coords->y = 2.0 * mirror->mirror_position_y - origin->y;
strokes = g_list_prepend (strokes, coords);
}
if (mirror->vertical_mirror)
{
coords = g_memdup (origin, sizeof (GimpCoords));
coords->x = 2.0 * mirror->mirror_position_x - origin->x;
strokes = g_list_prepend (strokes, coords);
}
if (mirror->point_symmetry)
{
coords = g_memdup (origin, sizeof (GimpCoords));
coords->x = 2.0 * mirror->mirror_position_x - origin->x;
coords->y = 2.0 * mirror->mirror_position_y - origin->y;
strokes = g_list_prepend (strokes, coords);
}
sym->strokes = g_list_reverse (strokes);
g_signal_emit_by_name (sym, "strokes-updated", sym->image);
}
static void
gimp_mirror_prepare_operations (GimpMirror *mirror,
gint paint_width,
gint paint_height)
{
if (paint_width == mirror->last_paint_width &&
paint_height == mirror->last_paint_height)
return;
mirror->last_paint_width = paint_width;
mirror->last_paint_height = paint_height;
if (mirror->horizontal_op)
g_object_unref (mirror->horizontal_op);
mirror->horizontal_op = gegl_node_new_child (NULL,
"operation", "gegl:reflect",
"origin-x", 0.0,
"origin-y", paint_height / 2.0,
"x", 1.0,
"y", 0.0,
NULL);
if (mirror->vertical_op)
g_object_unref (mirror->vertical_op);
mirror->vertical_op = gegl_node_new_child (NULL,
"operation", "gegl:reflect",
"origin-x", paint_width / 2.0,
"origin-y", 0.0,
"x", 0.0,
"y", 1.0,
NULL);
if (mirror->central_op)
g_object_unref (mirror->central_op);
mirror->central_op = gegl_node_new_child (NULL,
"operation", "gegl:rotate",
"origin-x", paint_width / 2.0,
"origin-y", paint_height / 2.0,
"degrees", 180.0,
NULL);
}
static GeglNode *
gimp_mirror_get_operation (GimpSymmetry *sym,
gint stroke,
gint paint_width,
gint paint_height)
{
GimpMirror *mirror = GIMP_MIRROR (sym);
GeglNode *op;
g_return_val_if_fail (stroke >= 0 &&
stroke < g_list_length (sym->strokes), NULL);
gimp_mirror_prepare_operations (mirror, paint_width, paint_height);
if (mirror->disable_transformation || stroke == 0 ||
paint_width == 0 || paint_height == 0)
op = NULL;
else if (stroke == 1 && mirror->horizontal_mirror)
op = g_object_ref (mirror->horizontal_op);
else if ((stroke == 2 && mirror->horizontal_mirror &&
mirror->vertical_mirror) ||
(stroke == 1 && mirror->vertical_mirror &&
! mirror->horizontal_mirror))
op = g_object_ref (mirror->vertical_op);
else
op = g_object_ref (mirror->central_op);
return op;
}
static void
gimp_mirror_reset (GimpMirror *mirror)
{
GimpSymmetry *sym = GIMP_SYMMETRY (mirror);
if (sym->origin)
{
gimp_symmetry_set_origin (sym, sym->drawable,
sym->origin);
}
}
static void
gimp_mirror_add_guide (GimpMirror *mirror,
GimpOrientationType orientation)
{
GimpSymmetry *sym = GIMP_SYMMETRY (mirror);
GimpImage *image;
Gimp *gimp;
GimpGuide *guide;
gdouble position;
image = sym->image;
gimp = image->gimp;
guide = gimp_guide_custom_new (orientation,
gimp->next_guide_ID++,
GIMP_GUIDE_STYLE_MIRROR);
if (orientation == GIMP_ORIENTATION_HORIZONTAL)
{
/* Mirror guide position at first activation is at canvas middle. */
if (mirror->mirror_position_y < 1.0)
position = gimp_image_get_height (image) / 2.0;
else
position = mirror->mirror_position_y;
g_object_set (mirror,
"mirror-position-y", position,
NULL);
mirror->horizontal_guide = guide;
}
else
{
/* Mirror guide position at first activation is at canvas middle. */
if (mirror->mirror_position_x < 1.0)
position = gimp_image_get_width (image) / 2.0;
else
position = mirror->mirror_position_x;
g_object_set (mirror,
"mirror-position-x", position,
NULL);
mirror->vertical_guide = guide;
}
g_signal_connect (guide, "removed",
G_CALLBACK (gimp_mirror_guide_removed_cb),
mirror);
gimp_image_add_guide (image, guide, (gint) position);
g_signal_connect (guide, "notify::position",
G_CALLBACK (gimp_mirror_guide_position_cb),
mirror);
}
static void
gimp_mirror_remove_guide (GimpMirror *mirror,
GimpOrientationType orientation)
{
GimpSymmetry *sym = GIMP_SYMMETRY (mirror);
GimpImage *image;
GimpGuide *guide;
image = sym->image;
guide = (orientation == GIMP_ORIENTATION_HORIZONTAL) ?
mirror->horizontal_guide : mirror->vertical_guide;
g_signal_handlers_disconnect_by_func (G_OBJECT (guide),
gimp_mirror_guide_removed_cb,
mirror);
g_signal_handlers_disconnect_by_func (G_OBJECT (guide),
gimp_mirror_guide_position_cb,
mirror);
gimp_image_remove_guide (image, guide, FALSE);
g_object_unref (guide);
if (orientation == GIMP_ORIENTATION_HORIZONTAL)
mirror->horizontal_guide = NULL;
else
mirror->vertical_guide = NULL;
}
static void
gimp_mirror_guide_removed_cb (GObject *object,
GimpMirror *mirror)
{
GimpSymmetry *symmetry = GIMP_SYMMETRY (mirror);
g_signal_handlers_disconnect_by_func (object,
gimp_mirror_guide_removed_cb,
mirror);
g_signal_handlers_disconnect_by_func (object,
gimp_mirror_guide_position_cb,
mirror);
if (GIMP_GUIDE (object) == mirror->horizontal_guide)
{
g_object_unref (mirror->horizontal_guide);
mirror->horizontal_guide = NULL;
mirror->horizontal_mirror = FALSE;
mirror->point_symmetry = FALSE;
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),
gimp_mirror_guide_removed_cb,
mirror);
g_signal_handlers_disconnect_by_func (G_OBJECT (mirror->vertical_guide),
gimp_mirror_guide_position_cb,
mirror);
gimp_image_remove_guide (symmetry->image,
mirror->vertical_guide,
FALSE);
g_clear_object (&mirror->vertical_guide);
}
}
else if (GIMP_GUIDE (object) == mirror->vertical_guide)
{
g_object_unref (mirror->vertical_guide);
mirror->vertical_guide = NULL;
mirror->vertical_mirror = FALSE;
mirror->point_symmetry = FALSE;
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),
gimp_mirror_guide_removed_cb,
mirror);
g_signal_handlers_disconnect_by_func (G_OBJECT (mirror->horizontal_guide),
gimp_mirror_guide_position_cb,
mirror);
gimp_image_remove_guide (symmetry->image,
mirror->horizontal_guide,
FALSE);
g_clear_object (&mirror->horizontal_guide);
}
}
if (mirror->horizontal_guide == NULL &&
mirror->vertical_guide == NULL)
{
gimp_image_symmetry_remove (symmetry->image,
GIMP_SYMMETRY (mirror));
}
else
{
gimp_mirror_reset (mirror);
g_signal_emit_by_name (mirror, "gui-param-changed",
GIMP_SYMMETRY (mirror)->image);
}
}
static void
gimp_mirror_guide_position_cb (GObject *object,
GParamSpec *pspec,
GimpMirror *mirror)
{
GimpGuide *guide = GIMP_GUIDE (object);
if (guide == mirror->horizontal_guide)
{
g_object_set (mirror,
"mirror-position-y", (gdouble) gimp_guide_get_position (guide),
NULL);
}
else if (guide == mirror->vertical_guide)
{
g_object_set (mirror,
"mirror-position-x", (gdouble) gimp_guide_get_position (guide),
NULL);
}
}
static void
gimp_mirror_active_changed (GimpSymmetry *sym)
{
GimpMirror *mirror = GIMP_MIRROR (sym);
if (sym->active)
{
if ((mirror->horizontal_mirror || mirror->point_symmetry) &&
! mirror->horizontal_guide)
gimp_mirror_add_guide (mirror, GIMP_ORIENTATION_HORIZONTAL);
if ((mirror->vertical_mirror || mirror->point_symmetry) &&
! mirror->vertical_guide)
gimp_mirror_add_guide (mirror, GIMP_ORIENTATION_VERTICAL);
}
else
{
if (mirror->horizontal_guide)
gimp_mirror_remove_guide (mirror, GIMP_ORIENTATION_HORIZONTAL);
if (mirror->vertical_guide)
gimp_mirror_remove_guide (mirror, GIMP_ORIENTATION_VERTICAL);
}
}
static void
gimp_mirror_set_horizontal_symmetry (GimpMirror *mirror,
gboolean active)
{
if (active == mirror->horizontal_mirror)
return;
mirror->horizontal_mirror = active;
if (active)
{
if (! mirror->horizontal_guide)
gimp_mirror_add_guide (mirror, GIMP_ORIENTATION_HORIZONTAL);
}
else if (! mirror->point_symmetry)
{
gimp_mirror_remove_guide (mirror, GIMP_ORIENTATION_HORIZONTAL);
}
gimp_mirror_reset (mirror);
}
static void
gimp_mirror_set_vertical_symmetry (GimpMirror *mirror,
gboolean active)
{
if (active == mirror->vertical_mirror)
return;
mirror->vertical_mirror = active;
if (active)
{
if (! mirror->vertical_guide)
gimp_mirror_add_guide (mirror, GIMP_ORIENTATION_VERTICAL);
}
else if (! mirror->point_symmetry)
{
gimp_mirror_remove_guide (mirror, GIMP_ORIENTATION_VERTICAL);
}
gimp_mirror_reset (mirror);
}
static void
gimp_mirror_set_point_symmetry (GimpMirror *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)
gimp_mirror_add_guide (mirror, GIMP_ORIENTATION_HORIZONTAL);
/* Show the vertical guide unless already shown */
if (! mirror->vertical_guide)
gimp_mirror_add_guide (mirror, GIMP_ORIENTATION_VERTICAL);
}
else
{
/* Remove the horizontal guide unless needed by horizontal mirror */
if (! mirror->horizontal_mirror)
gimp_mirror_remove_guide (mirror, GIMP_ORIENTATION_HORIZONTAL);
/* Remove the vertical guide unless needed by vertical mirror */
if (! mirror->vertical_mirror)
gimp_mirror_remove_guide (mirror, GIMP_ORIENTATION_VERTICAL);
}
gimp_mirror_reset (mirror);
}
static void
gimp_mirror_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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