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gimp/app/vectors/gimpstroke.c

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/* The GIMP -- an image manipulation program
* Copyright (C) 1995 Spencer Kimball and Peter Mattis
*
* gimpstroke.c
* Copyright (C) 2002 Simon Budig <simon@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 2 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, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
#include "config.h"
#include <glib-object.h>
#include "vectors-types.h"
#include "core/gimp-utils.h"
#include "gimpanchor.h"
#include "gimpstroke.h"
enum
{
PROP_0,
PROP_CONTROL_POINTS,
PROP_CLOSED
};
/* Prototypes */
static void gimp_stroke_class_init (GimpStrokeClass *klass);
static void gimp_stroke_init (GimpStroke *stroke);
static void gimp_stroke_set_property (GObject *object,
guint property_id,
const GValue *value,
GParamSpec *pspec);
static void gimp_stroke_get_property (GObject *object,
guint property_id,
GValue *value,
GParamSpec *pspec);
static void gimp_stroke_finalize (GObject *object);
static gint64 gimp_stroke_get_memsize (GimpObject *object,
gint64 *gui_size);
static gdouble gimp_stroke_real_nearest_point_get (const GimpStroke *stroke,
const GimpCoords *coord,
const gdouble precision,
GimpCoords *ret_point,
GimpAnchor **ret_segment_start,
GimpAnchor **ret_segment_end,
gdouble *ret_pos);
static GimpAnchor * gimp_stroke_real_anchor_get (const GimpStroke *stroke,
const GimpCoords *coord);
static GimpAnchor * gimp_stroke_real_anchor_get_next (const GimpStroke *stroke,
const GimpAnchor *prev);
static void gimp_stroke_real_anchor_select (GimpStroke *stroke,
GimpAnchor *anchor,
gboolean selected,
gboolean exclusive);
static void gimp_stroke_real_anchor_move_relative (GimpStroke *stroke,
GimpAnchor *anchor,
const GimpCoords *delta,
GimpAnchorFeatureType feature);
static void gimp_stroke_real_anchor_move_absolute (GimpStroke *stroke,
GimpAnchor *anchor,
const GimpCoords *delta,
GimpAnchorFeatureType feature);
static void gimp_stroke_real_anchor_convert (GimpStroke *stroke,
GimpAnchor *anchor,
GimpAnchorFeatureType feature);
static void gimp_stroke_real_anchor_delete (GimpStroke *stroke,
GimpAnchor *anchor);
static gboolean gimp_stroke_real_point_is_movable
(GimpStroke *stroke,
GimpAnchor *predec,
gdouble position);
static void gimp_stroke_real_point_move_relative
(GimpStroke *stroke,
GimpAnchor *predec,
gdouble position,
const GimpCoords *deltacoord,
GimpAnchorFeatureType feature);
static void gimp_stroke_real_point_move_absolute
(GimpStroke *stroke,
GimpAnchor *predec,
gdouble position,
const GimpCoords *coord,
GimpAnchorFeatureType feature);
static void gimp_stroke_real_close (GimpStroke *stroke);
static GimpStroke * gimp_stroke_real_open (GimpStroke *stroke,
GimpAnchor *end_anchor);
static gboolean gimp_stroke_real_anchor_is_insertable
(GimpStroke *stroke,
GimpAnchor *predec,
gdouble position);
static GimpAnchor * gimp_stroke_real_anchor_insert (GimpStroke *stroke,
GimpAnchor *predec,
gdouble position);
static gboolean gimp_stroke_real_is_extendable (GimpStroke *stroke,
GimpAnchor *neighbor);
static GimpAnchor * gimp_stroke_real_extend (GimpStroke *stroke,
const GimpCoords *coords,
GimpAnchor *neighbor,
GimpVectorExtendMode extend_mode);
gboolean gimp_stroke_real_connect_stroke (GimpStroke *stroke,
GimpAnchor *anchor,
GimpStroke *extension,
GimpAnchor *neighbor);
static gboolean gimp_stroke_real_is_empty (const GimpStroke *stroke);
static gdouble gimp_stroke_real_get_length (const GimpStroke *stroke);
static gdouble gimp_stroke_real_get_distance (const GimpStroke *stroke,
const GimpCoords *coord);
static GArray * gimp_stroke_real_interpolate (const GimpStroke *stroke,
gdouble precision,
gboolean *closed);
static GimpStroke * gimp_stroke_real_duplicate (const GimpStroke *stroke);
static GimpStroke * gimp_stroke_real_make_bezier (const GimpStroke *stroke);
static void gimp_stroke_real_translate (GimpStroke *stroke,
gdouble offset_x,
gdouble offset_y);
static void gimp_stroke_real_scale (GimpStroke *stroke,
gdouble scale_x,
gdouble scale_y);
static void gimp_stroke_real_transform (GimpStroke *stroke,
const GimpMatrix3 *matrix);
static GList * gimp_stroke_real_get_draw_anchors (const GimpStroke *stroke);
static GList * gimp_stroke_real_get_draw_controls (const GimpStroke *stroke);
static GArray * gimp_stroke_real_get_draw_lines (const GimpStroke *stroke);
static GArray * gimp_stroke_real_control_points_get (const GimpStroke *stroke,
gboolean *ret_closed);
/* private variables */
static GimpObjectClass *parent_class = NULL;
GType
gimp_stroke_get_type (void)
{
static GType stroke_type = 0;
if (! stroke_type)
{
static const GTypeInfo stroke_info =
{
sizeof (GimpStrokeClass),
(GBaseInitFunc) NULL,
(GBaseFinalizeFunc) NULL,
(GClassInitFunc) gimp_stroke_class_init,
NULL, /* class_finalize */
NULL, /* class_data */
sizeof (GimpStroke),
0, /* n_preallocs */
(GInstanceInitFunc) gimp_stroke_init,
};
stroke_type = g_type_register_static (GIMP_TYPE_OBJECT,
"GimpStroke",
&stroke_info, 0);
}
return stroke_type;
}
static void
gimp_stroke_class_init (GimpStrokeClass *klass)
{
GObjectClass *object_class;
GimpObjectClass *gimp_object_class;
GParamSpec *anchor_param_spec;
GParamSpec *control_points_param_spec;
GParamSpec *close_param_spec;
object_class = G_OBJECT_CLASS (klass);
gimp_object_class = GIMP_OBJECT_CLASS (klass);
parent_class = g_type_class_peek_parent (klass);
object_class->finalize = gimp_stroke_finalize;
object_class->get_property = gimp_stroke_get_property;
object_class->set_property = gimp_stroke_set_property;
gimp_object_class->get_memsize = gimp_stroke_get_memsize;
klass->changed = NULL;
klass->removed = NULL;
klass->anchor_get = gimp_stroke_real_anchor_get;
klass->anchor_get_next = gimp_stroke_real_anchor_get_next;
klass->anchor_select = gimp_stroke_real_anchor_select;
klass->anchor_move_relative = gimp_stroke_real_anchor_move_relative;
klass->anchor_move_absolute = gimp_stroke_real_anchor_move_absolute;
klass->anchor_convert = gimp_stroke_real_anchor_convert;
klass->anchor_delete = gimp_stroke_real_anchor_delete;
klass->point_is_movable = gimp_stroke_real_point_is_movable;
klass->point_move_relative = gimp_stroke_real_point_move_relative;
klass->point_move_absolute = gimp_stroke_real_point_move_absolute;
klass->nearest_point_get = gimp_stroke_real_nearest_point_get;
klass->close = gimp_stroke_real_close;
klass->open = gimp_stroke_real_open;
klass->anchor_is_insertable = gimp_stroke_real_anchor_is_insertable;
klass->anchor_insert = gimp_stroke_real_anchor_insert;
klass->is_extendable = gimp_stroke_real_is_extendable;
klass->extend = gimp_stroke_real_extend;
klass->connect_stroke = gimp_stroke_real_connect_stroke;
klass->is_empty = gimp_stroke_real_is_empty;
klass->get_length = gimp_stroke_real_get_length;
klass->get_distance = gimp_stroke_real_get_distance;
klass->interpolate = gimp_stroke_real_interpolate;
klass->duplicate = gimp_stroke_real_duplicate;
klass->make_bezier = gimp_stroke_real_make_bezier;
klass->translate = gimp_stroke_real_translate;
klass->scale = gimp_stroke_real_scale;
klass->transform = gimp_stroke_real_transform;
klass->get_draw_anchors = gimp_stroke_real_get_draw_anchors;
klass->get_draw_controls = gimp_stroke_real_get_draw_controls;
klass->get_draw_lines = gimp_stroke_real_get_draw_lines;
klass->control_points_get = gimp_stroke_real_control_points_get;
anchor_param_spec = g_param_spec_boxed ("gimp-anchor",
"Gimp Anchor",
"The control points of a Stroke",
GIMP_TYPE_ANCHOR,
G_PARAM_WRITABLE |
G_PARAM_CONSTRUCT_ONLY);
control_points_param_spec = g_param_spec_value_array ("control-points",
"Control Points",
"This is an ValueArray "
"with the initial "
"control points of "
"the new Stroke",
anchor_param_spec,
G_PARAM_WRITABLE |
G_PARAM_CONSTRUCT_ONLY);
close_param_spec = g_param_spec_boolean ("closed",
"Close Flag",
"this flag indicates, if the "
"stroke is closed or not",
FALSE,
G_PARAM_READWRITE |
G_PARAM_CONSTRUCT_ONLY);
g_object_class_install_property (object_class,
PROP_CONTROL_POINTS,
control_points_param_spec);
g_object_class_install_property (object_class,
PROP_CLOSED,
close_param_spec);
}
static void
gimp_stroke_init (GimpStroke *stroke)
{
stroke->anchors = NULL;
stroke->closed = FALSE;
}
static void
gimp_stroke_set_property (GObject *object,
guint property_id,
const GValue *value,
GParamSpec *pspec)
{
GimpStroke *stroke = GIMP_STROKE (object);
GValueArray *val_array;
GValue *item;
gint i;
switch (property_id)
{
case PROP_CLOSED:
stroke->closed = g_value_get_boolean (value);
break;
case PROP_CONTROL_POINTS:
g_return_if_fail (stroke->anchors == NULL);
g_return_if_fail (value != NULL);
val_array = g_value_get_boxed (value);
if (val_array == NULL)
return;
for (i = 0; i < val_array->n_values; i++)
{
item = g_value_array_get_nth (val_array, i);
g_return_if_fail (G_VALUE_HOLDS (item, GIMP_TYPE_ANCHOR));
stroke->anchors = g_list_append (stroke->anchors,
g_value_dup_boxed (item));
}
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
break;
}
}
static void
gimp_stroke_get_property (GObject *object,
guint property_id,
GValue *value,
GParamSpec *pspec)
{
GimpStroke *stroke = GIMP_STROKE (object);
switch (property_id)
{
case PROP_CLOSED:
g_value_set_boolean (value, stroke->closed);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
break;
}
}
static void
gimp_stroke_finalize (GObject *object)
{
GimpStroke *stroke = GIMP_STROKE (object);
if (stroke->anchors)
{
g_list_foreach (stroke->anchors, (GFunc) gimp_anchor_free, NULL);
g_list_free (stroke->anchors);
stroke->anchors = NULL;
}
G_OBJECT_CLASS (parent_class)->finalize (object);
}
static gint64
gimp_stroke_get_memsize (GimpObject *object,
gint64 *gui_size)
{
GimpStroke *stroke = GIMP_STROKE (object);
gint64 memsize = 0;
memsize += gimp_g_list_get_memsize (stroke->anchors, sizeof (GimpAnchor));
return memsize + GIMP_OBJECT_CLASS (parent_class)->get_memsize (object,
gui_size);
}
GimpAnchor *
gimp_stroke_anchor_get (const GimpStroke *stroke,
const GimpCoords *coord)
{
g_return_val_if_fail (GIMP_IS_STROKE (stroke), NULL);
return GIMP_STROKE_GET_CLASS (stroke)->anchor_get (stroke, coord);
}
gdouble
gimp_stroke_nearest_point_get (const GimpStroke *stroke,
const GimpCoords *coord,
const gdouble precision,
GimpCoords *ret_point,
GimpAnchor **ret_segment_start,
GimpAnchor **ret_segment_end,
gdouble *ret_pos)
{
g_return_val_if_fail (GIMP_IS_STROKE (stroke), FALSE);
g_return_val_if_fail (coord != NULL, FALSE);
return GIMP_STROKE_GET_CLASS (stroke)->nearest_point_get (stroke,
coord,
precision,
ret_point,
ret_segment_start,
ret_segment_end,
ret_pos);
}
static gdouble
gimp_stroke_real_nearest_point_get (const GimpStroke *stroke,
const GimpCoords *coord,
const gdouble precision,
GimpCoords *ret_point,
GimpAnchor **ret_segment_start,
GimpAnchor **ret_segment_end,
gdouble *ret_pos)
{
g_printerr ("gimp_stroke_nearest_point_get: default implementation\n");
return -1;
}
static GimpAnchor *
gimp_stroke_real_anchor_get (const GimpStroke *stroke,
const GimpCoords *coord)
{
gdouble dx, dy;
gdouble mindist = -1;
GList *anchors;
GList *list;
GimpAnchor *anchor = NULL;
g_return_val_if_fail (GIMP_IS_STROKE (stroke), NULL);
anchors = gimp_stroke_get_draw_controls (stroke);
for (list = anchors; list; list = g_list_next (list))
{
dx = coord->x - GIMP_ANCHOR (list->data)->position.x;
dy = coord->y - GIMP_ANCHOR (list->data)->position.y;
if (mindist < 0 || mindist > dx * dx + dy * dy)
{
mindist = dx * dx + dy * dy;
anchor = GIMP_ANCHOR (list->data);
}
}
g_list_free (anchors);
anchors = gimp_stroke_get_draw_anchors (stroke);
for (list = anchors; list; list = g_list_next (list))
{
dx = coord->x - GIMP_ANCHOR (list->data)->position.x;
dy = coord->y - GIMP_ANCHOR (list->data)->position.y;
if (mindist < 0 || mindist > dx * dx + dy * dy)
{
mindist = dx * dx + dy * dy;
anchor = GIMP_ANCHOR (list->data);
}
}
g_list_free (anchors);
return anchor;
}
GimpAnchor *
gimp_stroke_anchor_get_next (const GimpStroke *stroke,
const GimpAnchor *prev)
{
g_return_val_if_fail (GIMP_IS_STROKE (stroke), NULL);
return GIMP_STROKE_GET_CLASS (stroke)->anchor_get_next (stroke, prev);
}
static GimpAnchor *
gimp_stroke_real_anchor_get_next (const GimpStroke *stroke,
const GimpAnchor *prev)
{
GList *list;
g_return_val_if_fail (GIMP_IS_STROKE (stroke), NULL);
if (prev)
{
list = g_list_find (stroke->anchors, prev);
if (list)
list = g_list_next (list);
}
else
{
list = stroke->anchors;
}
if (list)
return GIMP_ANCHOR (list->data);
return NULL;
}
void
gimp_stroke_anchor_select (GimpStroke *stroke,
GimpAnchor *anchor,
gboolean selected,
gboolean exclusive)
{
g_return_if_fail (GIMP_IS_STROKE (stroke));
GIMP_STROKE_GET_CLASS (stroke)->anchor_select (stroke, anchor,
selected, exclusive);
}
static void
gimp_stroke_real_anchor_select (GimpStroke *stroke,
GimpAnchor *anchor,
gboolean selected,
gboolean exclusive)
{
GList *list;
list = stroke->anchors;
if (exclusive)
{
while (list)
{
GIMP_ANCHOR (list->data)->selected = FALSE;
list = g_list_next (list);
}
}
list = g_list_find (stroke->anchors, anchor);
if (list)
GIMP_ANCHOR (list->data)->selected = selected;
}
void
gimp_stroke_anchor_move_relative (GimpStroke *stroke,
GimpAnchor *anchor,
const GimpCoords *delta,
GimpAnchorFeatureType feature)
{
g_return_if_fail (GIMP_IS_STROKE (stroke));
g_return_if_fail (anchor != NULL);
g_return_if_fail (g_list_find (stroke->anchors, anchor));
GIMP_STROKE_GET_CLASS (stroke)->anchor_move_relative (stroke, anchor,
delta, feature);
}
static void
gimp_stroke_real_anchor_move_relative (GimpStroke *stroke,
GimpAnchor *anchor,
const GimpCoords *delta,
GimpAnchorFeatureType feature)
{
anchor->position.x += delta->x;
anchor->position.y += delta->y;
}
void
gimp_stroke_anchor_move_absolute (GimpStroke *stroke,
GimpAnchor *anchor,
const GimpCoords *coord,
GimpAnchorFeatureType feature)
{
g_return_if_fail (GIMP_IS_STROKE (stroke));
g_return_if_fail (anchor != NULL);
g_return_if_fail (g_list_find (stroke->anchors, anchor));
GIMP_STROKE_GET_CLASS (stroke)->anchor_move_absolute (stroke, anchor,
coord, feature);
}
static void
gimp_stroke_real_anchor_move_absolute (GimpStroke *stroke,
GimpAnchor *anchor,
const GimpCoords *coord,
GimpAnchorFeatureType feature)
{
anchor->position.x = coord->x;
anchor->position.y = coord->y;
}
gboolean
gimp_stroke_point_is_movable (GimpStroke *stroke,
GimpAnchor *predec,
gdouble position)
{
g_return_val_if_fail (GIMP_IS_STROKE (stroke), FALSE);
return GIMP_STROKE_GET_CLASS (stroke)->point_is_movable (stroke, predec,
position);
}
gboolean
gimp_stroke_real_point_is_movable (GimpStroke *stroke,
GimpAnchor *predec,
gdouble position)
{
return FALSE;
}
void
gimp_stroke_point_move_relative (GimpStroke *stroke,
GimpAnchor *predec,
gdouble position,
const GimpCoords *deltacoord,
GimpAnchorFeatureType feature)
{
g_return_if_fail (GIMP_IS_STROKE (stroke));
GIMP_STROKE_GET_CLASS (stroke)->point_move_relative (stroke, predec,
position, deltacoord,
feature);
}
void
gimp_stroke_real_point_move_relative (GimpStroke *stroke,
GimpAnchor *predec,
gdouble position,
const GimpCoords *deltacoord,
GimpAnchorFeatureType feature)
{
g_printerr ("gimp_stroke_point_move_relative: default implementation\n");
}
void
gimp_stroke_point_move_absolute (GimpStroke *stroke,
GimpAnchor *predec,
gdouble position,
const GimpCoords *coord,
GimpAnchorFeatureType feature)
{
g_return_if_fail (GIMP_IS_STROKE (stroke));
GIMP_STROKE_GET_CLASS (stroke)->point_move_absolute (stroke, predec,
position, coord,
feature);
}
void
gimp_stroke_real_point_move_absolute (GimpStroke *stroke,
GimpAnchor *predec,
gdouble position,
const GimpCoords *coord,
GimpAnchorFeatureType feature)
{
g_printerr ("gimp_stroke_point_move_absolute: default implementation\n");
}
void
gimp_stroke_close (GimpStroke *stroke)
{
g_return_if_fail (GIMP_IS_STROKE (stroke));
GIMP_STROKE_GET_CLASS (stroke)->close (stroke);
}
static void
gimp_stroke_real_close (GimpStroke *stroke)
{
stroke->closed = TRUE;
g_object_notify (G_OBJECT (stroke), "closed");
}
void
gimp_stroke_anchor_convert (GimpStroke *stroke,
GimpAnchor *anchor,
GimpAnchorFeatureType feature)
{
g_return_if_fail (GIMP_IS_STROKE (stroke));
GIMP_STROKE_GET_CLASS (stroke)->anchor_convert (stroke, anchor, feature);
}
static void
gimp_stroke_real_anchor_convert (GimpStroke *stroke,
GimpAnchor *anchor,
GimpAnchorFeatureType feature)
{
g_printerr ("gimp_stroke_anchor_convert: default implementation\n");
}
void
gimp_stroke_anchor_delete (GimpStroke *stroke,
GimpAnchor *anchor)
{
g_return_if_fail (GIMP_IS_STROKE (stroke));
GIMP_STROKE_GET_CLASS (stroke)->anchor_delete (stroke, anchor);
}
static void
gimp_stroke_real_anchor_delete (GimpStroke *stroke,
GimpAnchor *anchor)
{
g_printerr ("gimp_stroke_anchor_delete: default implementation\n");
}
GimpStroke *
gimp_stroke_open (GimpStroke *stroke,
GimpAnchor *end_anchor)
{
g_return_val_if_fail (GIMP_IS_STROKE (stroke), NULL);
return GIMP_STROKE_GET_CLASS (stroke)->open (stroke, end_anchor);
}
static GimpStroke *
gimp_stroke_real_open (GimpStroke *stroke,
GimpAnchor *end_anchor)
{
g_printerr ("gimp_stroke_open: default implementation\n");
return NULL;
}
gboolean
gimp_stroke_anchor_is_insertable (GimpStroke *stroke,
GimpAnchor *predec,
gdouble position)
{
g_return_val_if_fail (GIMP_IS_STROKE (stroke), FALSE);
return GIMP_STROKE_GET_CLASS (stroke)->anchor_is_insertable (stroke,
predec,
position);
}
gboolean
gimp_stroke_real_anchor_is_insertable (GimpStroke *stroke,
GimpAnchor *predec,
gdouble position)
{
g_return_val_if_fail (GIMP_IS_STROKE (stroke), FALSE);
return FALSE;
}
GimpAnchor *
gimp_stroke_anchor_insert (GimpStroke *stroke,
GimpAnchor *predec,
gdouble position)
{
g_return_val_if_fail (GIMP_IS_STROKE (stroke), FALSE);
return GIMP_STROKE_GET_CLASS (stroke)->anchor_insert (stroke,
predec, position);
}
GimpAnchor *
gimp_stroke_real_anchor_insert (GimpStroke *stroke,
GimpAnchor *predec,
gdouble position)
{
g_return_val_if_fail (GIMP_IS_STROKE (stroke), FALSE);
return NULL;
}
gboolean
gimp_stroke_is_extendable (GimpStroke *stroke,
GimpAnchor *neighbor)
{
g_return_val_if_fail (GIMP_IS_STROKE (stroke), FALSE);
return GIMP_STROKE_GET_CLASS (stroke)->is_extendable (stroke, neighbor);
}
static gboolean
gimp_stroke_real_is_extendable (GimpStroke *stroke,
GimpAnchor *neighbor)
{
return FALSE;
}
GimpAnchor *
gimp_stroke_extend (GimpStroke *stroke,
const GimpCoords *coords,
GimpAnchor *neighbor,
GimpVectorExtendMode extend_mode)
{
g_return_val_if_fail (GIMP_IS_STROKE (stroke), NULL);
return GIMP_STROKE_GET_CLASS (stroke)->extend (stroke, coords,
neighbor, extend_mode);
}
static GimpAnchor *
gimp_stroke_real_extend (GimpStroke *stroke,
const GimpCoords *coords,
GimpAnchor *neighbor,
GimpVectorExtendMode extend_mode)
{
g_printerr ("gimp_stroke_extend: default implementation\n");
return NULL;
}
gboolean
gimp_stroke_connect_stroke (GimpStroke *stroke,
GimpAnchor *anchor,
GimpStroke *extension,
GimpAnchor *neighbor)
{
g_return_val_if_fail (GIMP_IS_STROKE (stroke), FALSE);
g_return_val_if_fail (GIMP_IS_STROKE (extension), FALSE);
return GIMP_STROKE_GET_CLASS (stroke)->connect_stroke (stroke, anchor,
extension, neighbor);
}
gboolean
gimp_stroke_real_connect_stroke (GimpStroke *stroke,
GimpAnchor *anchor,
GimpStroke *extension,
GimpAnchor *neighbor)
{
g_printerr ("gimp_stroke_connect_stroke: default implementation\n");
return FALSE;
}
gboolean
gimp_stroke_is_empty (const GimpStroke *stroke)
{
g_return_val_if_fail (GIMP_IS_STROKE (stroke), FALSE);
return GIMP_STROKE_GET_CLASS (stroke)->is_empty (stroke);
}
static gboolean
gimp_stroke_real_is_empty (const GimpStroke *stroke)
{
return stroke->anchors == NULL;
}
gdouble
gimp_stroke_get_length (const GimpStroke *stroke)
{
g_return_val_if_fail (GIMP_IS_STROKE (stroke), 0.0);
return GIMP_STROKE_GET_CLASS (stroke)->get_length (stroke);
}
static gdouble
gimp_stroke_real_get_length (const GimpStroke *stroke)
{
g_printerr ("gimp_stroke_get_length: default implementation\n");
return 0.0;
}
gdouble
gimp_stroke_get_distance (const GimpStroke *stroke,
const GimpCoords *coord)
{
g_return_val_if_fail (GIMP_IS_STROKE (stroke), 0.0);
return GIMP_STROKE_GET_CLASS (stroke)->get_distance (stroke, coord);
}
static gdouble
gimp_stroke_real_get_distance (const GimpStroke *stroke,
const GimpCoords *coord)
{
g_printerr ("gimp_stroke_get_distance: default implementation\n");
return 0.0;
}
GArray *
gimp_stroke_interpolate (const GimpStroke *stroke,
gdouble precision,
gboolean *ret_closed)
{
g_return_val_if_fail (GIMP_IS_STROKE (stroke), NULL);
return GIMP_STROKE_GET_CLASS (stroke)->interpolate (stroke, precision,
ret_closed);
}
static GArray *
gimp_stroke_real_interpolate (const GimpStroke *stroke,
gdouble precision,
gboolean *ret_closed)
{
g_printerr ("gimp_stroke_interpolate: default implementation\n");
return NULL;
}
GimpStroke *
gimp_stroke_duplicate (const GimpStroke *stroke)
{
g_return_val_if_fail (GIMP_IS_STROKE (stroke), NULL);
return GIMP_STROKE_GET_CLASS (stroke)->duplicate (stroke);
}
GimpStroke *
gimp_stroke_real_duplicate (const GimpStroke *stroke)
{
GimpStroke *new_stroke;
GList *list;
new_stroke = g_object_new (G_TYPE_FROM_INSTANCE (stroke),
"name", GIMP_OBJECT (stroke)->name,
NULL);
new_stroke->anchors = g_list_copy (stroke->anchors);
for (list = new_stroke->anchors; list; list = g_list_next (list))
{
list->data = gimp_anchor_duplicate (GIMP_ANCHOR (list->data));
}
new_stroke->closed = stroke->closed;
return new_stroke;
}
GimpStroke *
gimp_stroke_make_bezier (const GimpStroke *stroke)
{
g_return_val_if_fail (GIMP_IS_STROKE (stroke), NULL);
return GIMP_STROKE_GET_CLASS (stroke)->make_bezier (stroke);
}
static GimpStroke *
gimp_stroke_real_make_bezier (const GimpStroke *stroke)
{
g_printerr ("gimp_stroke_make_bezier: default implementation\n");
return NULL;
}
void
gimp_stroke_translate (GimpStroke *stroke,
gdouble offset_x,
gdouble offset_y)
{
g_return_if_fail (GIMP_IS_STROKE (stroke));
GIMP_STROKE_GET_CLASS (stroke)->translate (stroke, offset_x, offset_y);
}
static void
gimp_stroke_real_translate (GimpStroke *stroke,
gdouble offset_x,
gdouble offset_y)
{
GList *list;
for (list = stroke->anchors; list; list = g_list_next (list))
{
GimpAnchor *anchor = list->data;
anchor->position.x += offset_x;
anchor->position.y += offset_y;
}
}
void
gimp_stroke_scale (GimpStroke *stroke,
gdouble scale_x,
gdouble scale_y)
{
g_return_if_fail (GIMP_IS_STROKE (stroke));
GIMP_STROKE_GET_CLASS (stroke)->scale (stroke, scale_x, scale_y);
}
static void
gimp_stroke_real_scale (GimpStroke *stroke,
gdouble scale_x,
gdouble scale_y)
{
GList *list;
for (list = stroke->anchors; list; list = g_list_next (list))
{
GimpAnchor *anchor = list->data;
anchor->position.x *= scale_x;
anchor->position.y *= scale_y;
}
}
void
gimp_stroke_transform (GimpStroke *stroke,
const GimpMatrix3 *matrix)
{
g_return_if_fail (GIMP_IS_STROKE (stroke));
GIMP_STROKE_GET_CLASS (stroke)->transform (stroke, matrix);
}
static void
gimp_stroke_real_transform (GimpStroke *stroke,
const GimpMatrix3 *matrix)
{
GList *list;
for (list = stroke->anchors; list; list = g_list_next (list))
{
GimpAnchor *anchor = list->data;
gimp_matrix3_transform_point (matrix,
anchor->position.x,
anchor->position.y,
&anchor->position.x,
&anchor->position.y);
}
}
GList *
gimp_stroke_get_draw_anchors (const GimpStroke *stroke)
{
g_return_val_if_fail (GIMP_IS_STROKE (stroke), NULL);
return GIMP_STROKE_GET_CLASS (stroke)->get_draw_anchors (stroke);
}
static GList *
gimp_stroke_real_get_draw_anchors (const GimpStroke *stroke)
{
GList *list;
GList *ret_list = NULL;
for (list = stroke->anchors; list; list = g_list_next (list))
{
if (GIMP_ANCHOR (list->data)->type == GIMP_ANCHOR_ANCHOR)
ret_list = g_list_prepend (ret_list, list->data);
}
return g_list_reverse (ret_list);
}
GList *
gimp_stroke_get_draw_controls (const GimpStroke *stroke)
{
g_return_val_if_fail (GIMP_IS_STROKE (stroke), NULL);
return GIMP_STROKE_GET_CLASS (stroke)->get_draw_controls (stroke);
}
static GList *
gimp_stroke_real_get_draw_controls (const GimpStroke *stroke)
{
GList *list;
GList *ret_list = NULL;
for (list = stroke->anchors; list; list = g_list_next (list))
{
GimpAnchor *anchor = list->data;
if (anchor->type == GIMP_ANCHOR_CONTROL)
{
GimpAnchor *next = list->next ? list->next->data : NULL;
GimpAnchor *prev = list->prev ? list->prev->data : NULL;
if (next && next->type == GIMP_ANCHOR_ANCHOR && next->selected)
{
/* Ok, this is a hack.
* The idea is to give control points at the end of a
* stroke a higher priority for the interactive tool. */
if (prev)
ret_list = g_list_prepend (ret_list, anchor);
else
ret_list = g_list_append (ret_list, anchor);
}
else if (prev && prev->type == GIMP_ANCHOR_ANCHOR && prev->selected)
{
/* same here... */
if (next)
ret_list = g_list_prepend (ret_list, anchor);
else
ret_list = g_list_append (ret_list, anchor);
}
}
}
return g_list_reverse (ret_list);
}
GArray *
gimp_stroke_get_draw_lines (const GimpStroke *stroke)
{
g_return_val_if_fail (GIMP_IS_STROKE (stroke), NULL);
return GIMP_STROKE_GET_CLASS (stroke)->get_draw_lines (stroke);
}
static GArray *
gimp_stroke_real_get_draw_lines (const GimpStroke *stroke)
{
GList *list;
GArray *ret_lines = NULL;
gint count = 0;
for (list = stroke->anchors; list; list = g_list_next (list))
{
GimpAnchor *anchor = list->data;
if (anchor->type == GIMP_ANCHOR_ANCHOR && anchor->selected)
{
if (list->next)
{
GimpAnchor *next = list->next->data;
if (count == 0)
ret_lines = g_array_new (FALSE, FALSE, sizeof (GimpCoords));
ret_lines = g_array_append_val (ret_lines, anchor->position);
ret_lines = g_array_append_val (ret_lines, next->position);
count += 1;
}
if (list->prev)
{
GimpAnchor *prev = list->prev->data;
if (count == 0)
ret_lines = g_array_new (FALSE, FALSE, sizeof (GimpCoords));
ret_lines = g_array_append_val (ret_lines, anchor->position);
ret_lines = g_array_append_val (ret_lines, prev->position);
count += 1;
}
}
}
return ret_lines;
}
GArray *
gimp_stroke_control_points_get (const GimpStroke *stroke,
gboolean *ret_closed)
{
g_return_val_if_fail (GIMP_IS_STROKE (stroke), NULL);
return GIMP_STROKE_GET_CLASS (stroke)->control_points_get (stroke,
ret_closed);
}
static GArray *
gimp_stroke_real_control_points_get (const GimpStroke *stroke,
gboolean *ret_closed)
{
guint num_anchors;
GArray *ret_array;
GList *list;
num_anchors = g_list_length (stroke->anchors);
list = g_list_first (stroke->anchors);
ret_array = g_array_sized_new (FALSE, FALSE,
sizeof (GimpAnchor), num_anchors);
for (list = g_list_first (stroke->anchors); list; list = g_list_next (list))
{
g_array_append_vals (ret_array, list->data, 1);
}
if (ret_closed)
*ret_closed = stroke->closed;
return ret_array;
}
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