mirror of https://github.com/GNOME/gimp.git
182 lines
7.9 KiB
C
182 lines
7.9 KiB
C
/* The GIMP -- an image manipulation program
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* Copyright (C) 1995 Spencer Kimball and Peter Mattis
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*
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* gimpstroke.h
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* Copyright (C) 2002 Simon Budig <simon@gimp.org>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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*/
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#ifndef __GIMP_STROKE_H__
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#define __GIMP_STROKE_H__
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#define GIMP_TYPE_STROKE (gimp_stroke_get_type ())
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#define GIMP_STROKE(obj) (G_TYPE_CHECK_INSTANCE_CAST ((obj), GIMP_TYPE_STROKE, GimpStroke))
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#define GIMP_STROKE_CLASS(klass) (G_TYPE_CHECK_CLASS_CAST ((klass), GIMP_TYPE_STROKE, GimpStrokeClass))
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#define GIMP_IS_STROKE(obj) (G_TYPE_CHECK_INSTANCE_TYPE ((obj), GIMP_TYPE_STROKE))
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#define GIMP_IS_STROKE_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE ((klass), GIMP_TYPE_STROKE))
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#define GIMP_STROKE_GET_CLASS(obj) (G_TYPE_INSTANCE_GET_CLASS ((obj), GIMP_TYPE_STROKE, GimpStrokeClass))
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struct _GimpStroke
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{
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GObject parent_instance;
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GList *anchors;
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GimpStroke *next;
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GimpAnchor *temp_anchor;
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/* Stuff missing? */
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};
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struct _GimpStrokeClass
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{
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GObjectClass parent_class;
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void (* changed) (GimpStroke *stroke);
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void (* removed) (GimpStroke *stroke);
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GimpAnchor * (* anchor_get) (const GimpStroke *stroke,
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const GimpCoords *coord);
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GimpAnchor * (* anchor_get_next) (const GimpStroke *stroke,
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const GimpAnchor *prev);
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void (* anchor_select) (GimpStroke *stroke,
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GimpAnchor *anchor,
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gboolean exclusive);
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void (* anchor_move_relative) (GimpStroke *stroke,
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GimpAnchor *anchor,
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const GimpCoords *deltacoord,
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const gint type);
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void (* anchor_move_absolute) (GimpStroke *stroke,
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GimpAnchor *anchor,
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const GimpCoords *coord,
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const gint type);
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void (* anchor_delete) (GimpStroke *stroke,
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GimpAnchor *anchor);
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gdouble (* get_length) (const GimpStroke *stroke);
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gdouble (* get_distance) (const GimpStroke *stroke,
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const GimpCoords *coord);
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GArray * (* interpolate) (const GimpStroke *stroke,
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const gdouble precision,
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gboolean *ret_closed);
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GimpAnchor * (* temp_anchor_get) (const GimpStroke *stroke);
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GimpAnchor * (* temp_anchor_set) (GimpStroke *stroke,
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const GimpCoords *coord);
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gboolean (* temp_anchor_fix) (GimpStroke *stroke);
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GimpStroke * (* make_bezier) (const GimpStroke *stroke);
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GList * (* get_draw_anchors) (const GimpStroke *stroke);
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GList * (* get_draw_controls) (const GimpStroke *stroke);
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GArray * (* get_draw_lines) (const GimpStroke *stroke);
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};
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/* stroke utility functions */
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GType gimp_stroke_get_type (void) G_GNUC_CONST;
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/* accessing / modifying the anchors */
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GimpAnchor * gimp_stroke_anchor_get (const GimpStroke *stroke,
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const GimpCoords *coord);
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/* prev == NULL: "first" anchor */
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GimpAnchor * gimp_stroke_anchor_get_next (const GimpStroke *stroke,
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const GimpAnchor *prev);
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void gimp_stroke_anchor_select (GimpStroke *stroke,
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GimpAnchor *anchor,
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gboolean exclusive);
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/* type will be an xorable enum:
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* VECTORS_NONE, VECTORS_FIX_ANGLE, VECTORS_FIX_RATIO, VECTORS_RESTRICT_ANGLE
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* or so.
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*/
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void gimp_stroke_anchor_move_relative (GimpStroke *stroke,
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GimpAnchor *anchor,
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const GimpCoords *deltacoord,
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const gint type);
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void gimp_stroke_anchor_move_absolute (GimpStroke *stroke,
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GimpAnchor *anchor,
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const GimpCoords *coord,
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const gint type);
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void gimp_stroke_anchor_delete (GimpStroke *stroke,
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GimpAnchor *anchor);
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/* accessing the shape of the curve */
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gdouble gimp_stroke_get_length (const GimpStroke *stroke);
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gdouble gimp_stroke_get_distance (const GimpStroke *stroke,
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const GimpCoords *coord);
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/* returns the number of valid coordinates */
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GArray * gimp_stroke_interpolate (const GimpStroke *stroke,
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gdouble precision,
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gboolean *ret_closed);
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/* Allow a singular temorary anchor (marking the "working point")? */
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GimpAnchor * gimp_stroke_temp_anchor_get (const GimpStroke *stroke);
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GimpAnchor * gimp_stroke_temp_anchor_set (GimpStroke *stroke,
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const GimpCoords *coord);
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gboolean gimp_stroke_temp_anchor_fix (GimpStroke *stroke);
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/* usually overloaded */
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/* creates a bezier approximation. */
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GimpStroke * gimp_stroke_make_bezier (const GimpStroke *stroke);
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GList * gimp_stroke_get_draw_anchors (const GimpStroke *stroke);
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GList * gimp_stroke_get_draw_controls (const GimpStroke *stroke);
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GArray * gimp_stroke_get_draw_lines (const GimpStroke *stroke);
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#endif /* __GIMP_STROKE_H__ */
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