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/* GIMP - The GNU Image Manipulation Program
* Copyright (C) 1995 Spencer Kimball and Peter Mattis
*
* gimpvectors.h
* 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.
*/
#ifndef __GIMP_VECTORS_H__
#define __GIMP_VECTORS_H__
#include "core/gimpitem.h"
#define GIMP_TYPE_VECTORS (gimp_vectors_get_type ())
#define GIMP_VECTORS(obj) (G_TYPE_CHECK_INSTANCE_CAST ((obj), GIMP_TYPE_VECTORS, GimpVectors))
#define GIMP_VECTORS_CLASS(klass) (G_TYPE_CHECK_CLASS_CAST ((klass), GIMP_TYPE_VECTORS, GimpVectorsClass))
#define GIMP_IS_VECTORS(obj) (G_TYPE_CHECK_INSTANCE_TYPE ((obj), GIMP_TYPE_VECTORS))
#define GIMP_IS_VECTORS_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE ((klass), GIMP_TYPE_VECTORS))
#define GIMP_VECTORS_GET_CLASS(obj) (G_TYPE_INSTANCE_GET_CLASS ((obj), GIMP_TYPE_VECTORS, GimpVectorsClass))
typedef struct _GimpVectorsClass GimpVectorsClass;
struct _GimpVectors
{
GimpItem parent_instance;
GList *strokes; /* The List of GimpStrokes */
gint last_stroke_ID;
gint freeze_count;
gdouble precision;
};
struct _GimpVectorsClass
{
GimpItemClass parent_class;
/* signals */
void (* freeze) (GimpVectors *vectors);
void (* thaw) (GimpVectors *vectors);
/* virtual functions */
void (* stroke_add) (GimpVectors *vectors,
GimpStroke *stroke);
void (* stroke_remove) (GimpVectors *vectors,
GimpStroke *stroke);
GimpStroke * (* stroke_get) (const GimpVectors *vectors,
const GimpCoords *coord);
GimpStroke * (* stroke_get_next) (const GimpVectors *vectors,
const GimpStroke *prev);
gdouble (* stroke_get_length) (const GimpVectors *vectors,
const GimpStroke *stroke);
GimpAnchor * (* anchor_get) (const GimpVectors *vectors,
const GimpCoords *coord,
GimpStroke **ret_stroke);
void (* anchor_delete) (GimpVectors *vectors,
GimpAnchor *anchor);
gdouble (* get_length) (const GimpVectors *vectors,
const GimpAnchor *start);
gdouble (* get_distance) (const GimpVectors *vectors,
const GimpCoords *coord);
gint (* interpolate) (const GimpVectors *vectors,
const GimpStroke *stroke,
gdouble precision,
gint max_points,
GimpCoords *ret_coords);
GimpVectors * (* make_bezier) (const GimpVectors *vectors);
};
/* vectors utility functions */
GType gimp_vectors_get_type (void) G_GNUC_CONST;
GimpVectors * gimp_vectors_new (GimpImage *image,
const gchar *name);
void gimp_vectors_freeze (GimpVectors *vectors);
void gimp_vectors_thaw (GimpVectors *vectors);
void gimp_vectors_copy_strokes (const GimpVectors *src_vectors,
GimpVectors *dest_vectors);
void gimp_vectors_add_strokes (const GimpVectors *src_vectors,
GimpVectors *dest_vectors);
/* accessing / modifying the anchors */
GimpAnchor * gimp_vectors_anchor_get (const GimpVectors *vectors,
const GimpCoords *coord,
GimpStroke **ret_stroke);
/* prev == NULL: "first" anchor */
GimpAnchor * gimp_vectors_anchor_get_next (const GimpVectors *vectors,
const GimpAnchor *prev);
/* type will be an xorable enum:
* VECTORS_NONE, VECTORS_FIX_ANGLE, VECTORS_FIX_RATIO, VECTORS_RESTRICT_ANGLE
* or so.
*/
void gimp_vectors_anchor_move_relative (GimpVectors *vectors,
GimpAnchor *anchor,
const GimpCoords *deltacoord,
gint type);
void gimp_vectors_anchor_move_absolute (GimpVectors *vectors,
GimpAnchor *anchor,
const GimpCoords *coord,
gint type);
void gimp_vectors_anchor_delete (GimpVectors *vectors,
GimpAnchor *anchor);
void gimp_vectors_anchor_select (GimpVectors *vectors,
GimpStroke *target_stroke,
GimpAnchor *anchor,
gboolean selected,
gboolean exclusive);
/* GimpStroke is a connected component of a GimpVectors object */
void gimp_vectors_stroke_add (GimpVectors *vectors,
GimpStroke *stroke);
void gimp_vectors_stroke_remove (GimpVectors *vectors,
GimpStroke *stroke);
gint gimp_vectors_get_n_strokes (const GimpVectors *vectors);
GimpStroke * gimp_vectors_stroke_get (const GimpVectors *vectors,
const GimpCoords *coord);
GimpStroke * gimp_vectors_stroke_get_by_ID (const GimpVectors *vectors,
gint id);
/* prev == NULL: "first" stroke */
GimpStroke * gimp_vectors_stroke_get_next (const GimpVectors *vectors,
const GimpStroke *prev);
gdouble gimp_vectors_stroke_get_length (const GimpVectors *vectors,
const GimpStroke *stroke);
/* accessing the shape of the curve */
gdouble gimp_vectors_get_length (const GimpVectors *vectors,
const GimpAnchor *start);
gdouble gimp_vectors_get_distance (const GimpVectors *vectors,
const GimpCoords *coord);
gboolean gimp_vectors_bounds (const GimpVectors *vectors,
gdouble *x1,
gdouble *y1,
gdouble *x2,
gdouble *y2);
/* returns the number of valid coordinates */
gint gimp_vectors_interpolate (const GimpVectors *vectors,
const GimpStroke *stroke,
gdouble precision,
gint max_points,
GimpCoords *ret_coords);
/* usually overloaded */
/* creates a bezier approximation. */
GimpVectors * gimp_vectors_make_bezier (const GimpVectors *vectors);
#endif /* __GIMP_VECTORS_H__ */
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