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/* The GIMP -- an image manipulation program
* Copyright (C) 1995 Spencer Kimball and Peter Mattis
*
* gimpstroke.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_STROKE_H__
#define __GIMP_STROKE_H__
#include "core/gimpobject.h"
#define GIMP_TYPE_STROKE (gimp_stroke_get_type ())
#define GIMP_STROKE(obj) (G_TYPE_CHECK_INSTANCE_CAST ((obj), GIMP_TYPE_STROKE, GimpStroke))
#define GIMP_STROKE_CLASS(klass) (G_TYPE_CHECK_CLASS_CAST ((klass), GIMP_TYPE_STROKE, GimpStrokeClass))
#define GIMP_IS_STROKE(obj) (G_TYPE_CHECK_INSTANCE_TYPE ((obj), GIMP_TYPE_STROKE))
#define GIMP_IS_STROKE_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE ((klass), GIMP_TYPE_STROKE))
#define GIMP_STROKE_GET_CLASS(obj) (G_TYPE_INSTANCE_GET_CLASS ((obj), GIMP_TYPE_STROKE, GimpStrokeClass))
typedef struct _GimpStrokeClass GimpStrokeClass;
struct _GimpStroke
{
GimpObject parent_instance;
GList *anchors;
gboolean closed;
};
struct _GimpStrokeClass
{
GimpObjectClass parent_class;
void (* changed) (GimpStroke *stroke);
void (* removed) (GimpStroke *stroke);
GimpAnchor * (* anchor_get) (const GimpStroke *stroke,
const GimpCoords *coord);
gdouble (* 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);
GimpAnchor * (* anchor_get_next) (const GimpStroke *stroke,
const GimpAnchor *prev);
void (* anchor_select) (GimpStroke *stroke,
GimpAnchor *anchor,
gboolean selected,
gboolean exclusive);
void (* anchor_move_relative) (GimpStroke *stroke,
GimpAnchor *anchor,
const GimpCoords *deltacoord,
GimpAnchorFeatureType feature);
void (* anchor_move_absolute) (GimpStroke *stroke,
GimpAnchor *anchor,
const GimpCoords *coord,
GimpAnchorFeatureType feature);
void (* anchor_convert) (GimpStroke *stroke,
GimpAnchor *anchor,
GimpAnchorFeatureType feature);
void (* anchor_delete) (GimpStroke *stroke,
GimpAnchor *anchor);
gboolean (* point_is_movable) (GimpStroke *stroke,
GimpAnchor *predec,
gdouble position);
void (* point_move_relative) (GimpStroke *stroke,
GimpAnchor *predec,
gdouble position,
const GimpCoords *deltacoord,
GimpAnchorFeatureType feature);
void (* point_move_absolute) (GimpStroke *stroke,
GimpAnchor *predec,
gdouble position,
const GimpCoords *coord,
GimpAnchorFeatureType feature);
void (* close) (GimpStroke *stroke);
GimpStroke * (* open) (GimpStroke *stroke,
GimpAnchor *end_anchor);
gboolean (* anchor_is_insertable) (GimpStroke *stroke,
GimpAnchor *predec,
gdouble position);
GimpAnchor * (* anchor_insert) (GimpStroke *stroke,
GimpAnchor *predec,
gdouble position);
gboolean (* is_extendable) (GimpStroke *stroke,
GimpAnchor *neighbor);
GimpAnchor * (* extend) (GimpStroke *stroke,
const GimpCoords *coords,
GimpAnchor *neighbor,
GimpVectorExtendMode extend_mode);
gboolean (* connect_stroke) (GimpStroke *stroke,
GimpAnchor *anchor,
GimpStroke *extension,
GimpAnchor *neighbor);
gboolean (* is_empty) (const GimpStroke *stroke);
gdouble (* get_length) (const GimpStroke *stroke,
const gdouble precision);
gdouble (* get_distance) (const GimpStroke *stroke,
const GimpCoords *coord);
gboolean (* get_point_at_dist) (const GimpStroke *stroke,
const gdouble dist,
const gdouble precision,
GimpCoords *position,
gdouble *slope);
GArray * (* interpolate) (const GimpStroke *stroke,
const gdouble precision,
gboolean *ret_closed);
GimpStroke * (* duplicate) (const GimpStroke *stroke);
GimpStroke * (* make_bezier) (const GimpStroke *stroke);
void (* translate) (GimpStroke *stroke,
gdouble offset_x,
gdouble offset_y);
void (* scale) (GimpStroke *stroke,
gdouble scale_x,
gdouble scale_y);
void (* transform) (GimpStroke *stroke,
const GimpMatrix3 *matrix);
GList * (* get_draw_anchors) (const GimpStroke *stroke);
GList * (* get_draw_controls) (const GimpStroke *stroke);
GArray * (* get_draw_lines) (const GimpStroke *stroke);
GArray * (* control_points_get) (const GimpStroke *stroke,
gboolean *ret_closed);
void (* art_stroke) (const GimpStroke *stroke);
};
GType gimp_stroke_get_type (void) G_GNUC_CONST;
/* accessing / modifying the anchors */
GArray * gimp_stroke_control_points_get (const GimpStroke *stroke,
gboolean *closed);
GimpAnchor * gimp_stroke_anchor_get (const GimpStroke *stroke,
const GimpCoords *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);
/* prev == NULL: "first" anchor */
GimpAnchor * gimp_stroke_anchor_get_next (const GimpStroke *stroke,
const GimpAnchor *prev);
void gimp_stroke_anchor_select (GimpStroke *stroke,
GimpAnchor *anchor,
gboolean selected,
gboolean exclusive);
/* type will be an xorable enum:
* VECTORS_NONE, VECTORS_FIX_ANGLE, VECTORS_FIX_RATIO, VECTORS_RESTRICT_ANGLE
* or so.
*/
void gimp_stroke_anchor_move_relative (GimpStroke *stroke,
GimpAnchor *anchor,
const GimpCoords *delta,
GimpAnchorFeatureType feature);
void gimp_stroke_anchor_move_absolute (GimpStroke *stroke,
GimpAnchor *anchor,
const GimpCoords *coord,
GimpAnchorFeatureType feature);
gboolean gimp_stroke_point_is_movable (GimpStroke *stroke,
GimpAnchor *predec,
gdouble position);
void gimp_stroke_point_move_relative (GimpStroke *stroke,
GimpAnchor *predec,
gdouble position,
const GimpCoords *deltacoord,
GimpAnchorFeatureType feature);
void gimp_stroke_point_move_absolute (GimpStroke *stroke,
GimpAnchor *predec,
gdouble position,
const GimpCoords *coord,
GimpAnchorFeatureType feature);
void gimp_stroke_close (GimpStroke *stroke);
void gimp_stroke_anchor_convert (GimpStroke *stroke,
GimpAnchor *anchor,
GimpAnchorFeatureType feature);
void gimp_stroke_anchor_delete (GimpStroke *stroke,
GimpAnchor *anchor);
GimpStroke * gimp_stroke_open (GimpStroke *stroke,
GimpAnchor *end_anchor);
gboolean gimp_stroke_anchor_is_insertable (GimpStroke *stroke,
GimpAnchor *predec,
gdouble position);
GimpAnchor * gimp_stroke_anchor_insert (GimpStroke *stroke,
GimpAnchor *predec,
gdouble position);
gboolean gimp_stroke_is_extendable (GimpStroke *stroke,
GimpAnchor *neighbor);
GimpAnchor * gimp_stroke_extend (GimpStroke *stroke,
const GimpCoords *coords,
GimpAnchor *neighbor,
GimpVectorExtendMode extend_mode);
gboolean gimp_stroke_connect_stroke (GimpStroke *stroke,
GimpAnchor *anchor,
GimpStroke *extension,
GimpAnchor *neighbor);
gboolean gimp_stroke_is_empty (const GimpStroke *stroke);
/* accessing the shape of the curve */
gdouble gimp_stroke_get_length (const GimpStroke *stroke,
const gdouble precision);
gdouble gimp_stroke_get_distance (const GimpStroke *stroke,
const GimpCoords *coord);
gboolean gimp_stroke_get_point_at_dist (const GimpStroke *stroke,
const gdouble dist,
const gdouble precision,
GimpCoords *position,
gdouble *slope);
/* returns an array of valid coordinates */
GArray * gimp_stroke_interpolate (const GimpStroke *stroke,
const gdouble precision,
gboolean *closed);
GimpStroke * gimp_stroke_duplicate (const GimpStroke *stroke);
/* creates a bezier approximation. */
GimpStroke * gimp_stroke_make_bezier (const GimpStroke *stroke);
void gimp_stroke_translate (GimpStroke *stroke,
gdouble offset_x,
gdouble offset_y);
void gimp_stroke_scale (GimpStroke *stroke,
gdouble scale_x,
gdouble scale_y);
void gimp_stroke_transform (GimpStroke *stroke,
const GimpMatrix3 *matrix);
GList * gimp_stroke_get_draw_anchors (const GimpStroke *stroke);
GList * gimp_stroke_get_draw_controls (const GimpStroke *stroke);
GArray * gimp_stroke_get_draw_lines (const GimpStroke *stroke);
#endif /* __GIMP_STROKE_H__ */
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