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gimp/app/core/gimpsymmetry.c

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/* GIMP - The GNU Image Manipulation Program
* Copyright (C) 1995 Spencer Kimball and Peter Mattis
*
* gimpsymmetry.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 <gegl.h>
#include <gdk-pixbuf/gdk-pixbuf.h>
#include "libgimpbase/gimpbase.h"
#include "libgimpconfig/gimpconfig.h"
#include "core-types.h"
#include "gimpdrawable.h"
#include "gimpimage.h"
#include "gimpimage-symmetry.h"
#include "gimpitem.h"
#include "gimpsymmetry.h"
#include "gimp-intl.h"
enum
{
STROKES_UPDATED,
GUI_PARAM_CHANGED,
ACTIVE_CHANGED,
LAST_SIGNAL
};
enum
{
PROP_0,
PROP_IMAGE,
PROP_ACTIVE,
};
/* Local function prototypes */
static void gimp_symmetry_finalize (GObject *object);
static void gimp_symmetry_set_property (GObject *object,
guint property_id,
const GValue *value,
GParamSpec *pspec);
static void gimp_symmetry_get_property (GObject *object,
guint property_id,
GValue *value,
GParamSpec *pspec);
static void gimp_symmetry_real_update_strokes (GimpSymmetry *sym,
GimpDrawable *drawable,
GimpCoords *origin);
static GeglNode * gimp_symmetry_real_get_op (GimpSymmetry *sym,
gint stroke,
gint paint_width,
gint paint_height);
G_DEFINE_TYPE_WITH_CODE (GimpSymmetry, gimp_symmetry, GIMP_TYPE_OBJECT,
G_IMPLEMENT_INTERFACE (GIMP_TYPE_CONFIG, NULL))
#define parent_class gimp_symmetry_parent_class
static guint gimp_symmetry_signals[LAST_SIGNAL] = { 0 };
static void
gimp_symmetry_class_init (GimpSymmetryClass *klass)
{
GObjectClass *object_class = G_OBJECT_CLASS (klass);
/* This signal should likely be emitted at the end of
* update_strokes() if stroke coordinates were changed.
*/
gimp_symmetry_signals[STROKES_UPDATED] =
g_signal_new ("strokes-updated",
G_TYPE_FROM_CLASS (klass),
G_SIGNAL_RUN_FIRST,
0,
NULL, NULL,
NULL,
G_TYPE_NONE,
1, GIMP_TYPE_IMAGE);
/* This signal should be emitted when you request a change in the
* settings UI. For instance adding some settings (therefore having
* a dynamic UI), or changing scale min/max extremes, etc.
*/
gimp_symmetry_signals[GUI_PARAM_CHANGED] =
g_signal_new ("gui-param-changed",
G_TYPE_FROM_CLASS (klass),
G_SIGNAL_RUN_FIRST,
0,
NULL, NULL,
NULL,
G_TYPE_NONE,
1, GIMP_TYPE_IMAGE);
gimp_symmetry_signals[ACTIVE_CHANGED] =
g_signal_new ("active-changed",
G_TYPE_FROM_CLASS (klass),
G_SIGNAL_RUN_FIRST,
G_STRUCT_OFFSET (GimpSymmetryClass, active_changed),
NULL, NULL,
NULL,
G_TYPE_NONE, 0);
object_class->finalize = gimp_symmetry_finalize;
object_class->set_property = gimp_symmetry_set_property;
object_class->get_property = gimp_symmetry_get_property;
klass->label = _("None");
klass->update_strokes = gimp_symmetry_real_update_strokes;
klass->get_operation = gimp_symmetry_real_get_op;
klass->active_changed = NULL;
g_object_class_install_property (object_class, PROP_IMAGE,
g_param_spec_object ("image",
NULL, NULL,
GIMP_TYPE_IMAGE,
GIMP_PARAM_READWRITE |
G_PARAM_CONSTRUCT_ONLY));
GIMP_CONFIG_PROP_BOOLEAN (object_class, PROP_ACTIVE,
"active",
_("Active"),
_("Activate symmetry painting"),
FALSE,
GIMP_PARAM_STATIC_STRINGS);
}
static void
gimp_symmetry_init (GimpSymmetry *sym)
{
}
static void
gimp_symmetry_finalize (GObject *object)
{
GimpSymmetry *sym = GIMP_SYMMETRY (object);
if (sym->drawable)
g_object_unref (sym->drawable);
g_free (sym->origin);
sym->origin = NULL;
g_list_free_full (sym->strokes, g_free);
sym->strokes = NULL;
G_OBJECT_CLASS (parent_class)->finalize (object);
}
static void
gimp_symmetry_set_property (GObject *object,
guint property_id,
const GValue *value,
GParamSpec *pspec)
{
GimpSymmetry *sym = GIMP_SYMMETRY (object);
switch (property_id)
{
case PROP_IMAGE:
sym->image = g_value_get_object (value);
break;
case PROP_ACTIVE:
sym->active = g_value_get_boolean (value);
g_signal_emit (sym, gimp_symmetry_signals[ACTIVE_CHANGED], 0,
sym->active);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
break;
}
}
static void
gimp_symmetry_get_property (GObject *object,
guint property_id,
GValue *value,
GParamSpec *pspec)
{
GimpSymmetry *sym = GIMP_SYMMETRY (object);
switch (property_id)
{
case PROP_IMAGE:
g_value_set_object (value, sym->image);
break;
case PROP_ACTIVE:
g_value_set_boolean (value, sym->active);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
break;
}
}
static void
gimp_symmetry_real_update_strokes (GimpSymmetry *sym,
GimpDrawable *drawable,
GimpCoords *origin)
{
/* The basic symmetry just uses the origin as is. */
sym->strokes = g_list_prepend (sym->strokes,
g_memdup (origin, sizeof (GimpCoords)));
}
static GeglNode *
gimp_symmetry_real_get_op (GimpSymmetry *sym,
gint stroke,
gint paint_width,
gint paint_height)
{
/* The basic symmetry just returns NULL, since no transformation of the
* brush painting happen. */
return NULL;
}
/***** Public Functions *****/
/**
* gimp_symmetry_set_origin:
* @sym: the #GimpSymmetry
* @drawable: the #GimpDrawable where painting will happen
* @origin: new base coordinates.
*
* Set the symmetry to new origin coordinates and drawable.
**/
void
gimp_symmetry_set_origin (GimpSymmetry *sym,
GimpDrawable *drawable,
GimpCoords *origin)
{
g_return_if_fail (GIMP_IS_SYMMETRY (sym));
g_return_if_fail (GIMP_IS_DRAWABLE (drawable));
g_return_if_fail (gimp_item_get_image (GIMP_ITEM (drawable)) == sym->image);
if (drawable != sym->drawable)
{
if (sym->drawable)
g_object_unref (sym->drawable);
sym->drawable = g_object_ref (drawable);
}
if (origin != sym->origin)
{
g_free (sym->origin);
sym->origin = g_memdup (origin, sizeof (GimpCoords));
}
g_list_free_full (sym->strokes, g_free);
sym->strokes = NULL;
GIMP_SYMMETRY_GET_CLASS (sym)->update_strokes (sym, drawable, origin);
}
/**
* gimp_symmetry_get_origin:
* @sym: the #GimpSymmetry
*
* Returns: the origin stroke coordinates.
* The returned value is owned by the #GimpSymmetry and must not be freed.
**/
GimpCoords *
gimp_symmetry_get_origin (GimpSymmetry *sym)
{
g_return_val_if_fail (GIMP_IS_SYMMETRY (sym), NULL);
return sym->origin;
}
/**
* gimp_symmetry_get_size:
* @sym: the #GimpSymmetry
*
* Returns: the total number of strokes.
**/
gint
gimp_symmetry_get_size (GimpSymmetry *sym)
{
g_return_val_if_fail (GIMP_IS_SYMMETRY (sym), 0);
return g_list_length (sym->strokes);
}
/**
* gimp_symmetry_get_coords:
* @sym: the #GimpSymmetry
* @stroke: the stroke number
*
* Returns: the coordinates of the stroke number @stroke.
* The returned value is owned by the #GimpSymmetry and must not be freed.
**/
GimpCoords *
gimp_symmetry_get_coords (GimpSymmetry *sym,
gint stroke)
{
g_return_val_if_fail (GIMP_IS_SYMMETRY (sym), NULL);
return g_list_nth_data (sym->strokes, stroke);
}
/**
* gimp_symmetry_get_operation:
* @sym: the #GimpSymmetry
* @stroke: the stroke number
* @paint_width: the width of the painting area
* @paint_height: the height of the painting area
*
* Returns: the operation to apply to the paint buffer for stroke number @stroke.
* NULL means to copy the original stroke as-is.
**/
GeglNode *
gimp_symmetry_get_operation (GimpSymmetry *sym,
gint stroke,
gint paint_width,
gint paint_height)
{
g_return_val_if_fail (GIMP_IS_SYMMETRY (sym), NULL);
return GIMP_SYMMETRY_GET_CLASS (sym)->get_operation (sym,
stroke,
paint_width,
paint_height);
}
/*
* gimp_symmetry_parasite_name:
* @type: the #GimpSymmetry's #GType
*
* Returns: a newly allocated string.
*/
gchar *
gimp_symmetry_parasite_name (GType type)
{
return g_strconcat ("gimp-image-symmetry:", g_type_name (type), NULL);
}
GimpParasite *
gimp_symmetry_to_parasite (const GimpSymmetry *sym)
{
GimpParasite *parasite;
gchar *parasite_name;
gchar *str;
g_return_val_if_fail (GIMP_IS_SYMMETRY (sym), NULL);
str = gimp_config_serialize_to_string (GIMP_CONFIG (sym), NULL);
g_return_val_if_fail (str != NULL, NULL);
parasite_name = gimp_symmetry_parasite_name (G_TYPE_FROM_INSTANCE (sym));
parasite = gimp_parasite_new (parasite_name,
GIMP_PARASITE_PERSISTENT,
strlen (str) + 1, str);
g_free (parasite_name);
g_free (str);
return parasite;
}
GimpSymmetry *
gimp_symmetry_from_parasite (const GimpParasite *parasite,
GimpImage *image,
GType type)
{
GimpSymmetry *symmetry;
gchar *parasite_name;
const gchar *str;
GError *error = NULL;
parasite_name = gimp_symmetry_parasite_name (type);
g_return_val_if_fail (parasite != NULL, NULL);
g_return_val_if_fail (strcmp (gimp_parasite_name (parasite),
parasite_name) == 0,
NULL);
g_free (parasite_name);
str = gimp_parasite_data (parasite);
g_return_val_if_fail (str != NULL, NULL);
symmetry = gimp_image_symmetry_new (image, type);
if (! gimp_config_deserialize_string (GIMP_CONFIG (symmetry),
str,
gimp_parasite_data_size (parasite),
NULL,
&error))
{
g_warning ("Failed to deserialize symmetry parasite: %s", error->message);
g_error_free (error);
}
return symmetry;
}
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