mirror of https://github.com/GNOME/gimp.git
185 lines
8.3 KiB
C
185 lines
8.3 KiB
C
/* GIMP - The GNU Image Manipulation Program
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* Copyright (C) 1995 Spencer Kimball and Peter Mattis
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*
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* gimppath.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 3 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, see <https://www.gnu.org/licenses/>.
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*/
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#ifndef __GIMP_PATH_H__
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#define __GIMP_PATH_H__
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#include "core/gimpitem.h"
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#define GIMP_TYPE_PATH (gimp_path_get_type ())
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#define GIMP_PATH(obj) (G_TYPE_CHECK_INSTANCE_CAST ((obj), GIMP_TYPE_PATH, GimpPath))
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#define GIMP_PATH_CLASS(klass) (G_TYPE_CHECK_CLASS_CAST ((klass), GIMP_TYPE_PATH, GimpPathClass))
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#define GIMP_IS_PATH(obj) (G_TYPE_CHECK_INSTANCE_TYPE ((obj), GIMP_TYPE_PATH))
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#define GIMP_IS_PATH_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE ((klass), GIMP_TYPE_PATH))
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#define GIMP_PATH_GET_CLASS(obj) (G_TYPE_INSTANCE_GET_CLASS ((obj), GIMP_TYPE_PATH, GimpPathClass))
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typedef struct _GimpPathClass GimpPathClass;
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struct _GimpPath
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{
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GimpItem parent_instance;
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GQueue *strokes; /* Queue of GimpStrokes */
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GHashTable *stroke_to_list; /* Map from GimpStroke to strokes listnode */
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gint last_stroke_id;
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gint freeze_count;
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gdouble precision;
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GimpBezierDesc *bezier_desc; /* Cached bezier representation */
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gboolean bounds_valid; /* Cached bounding box */
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gboolean bounds_empty;
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gdouble bounds_x1;
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gdouble bounds_y1;
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gdouble bounds_x2;
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gdouble bounds_y2;
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};
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struct _GimpPathClass
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{
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GimpItemClass parent_class;
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/* signals */
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void (* freeze) (GimpPath *path);
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void (* thaw) (GimpPath *path);
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/* virtual functions */
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void (* stroke_add) (GimpPath *path,
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GimpStroke *stroke);
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void (* stroke_remove) (GimpPath *path,
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GimpStroke *stroke);
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GimpStroke * (* stroke_get) (GimpPath *path,
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const GimpCoords *coord);
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GimpStroke * (* stroke_get_next) (GimpPath *path,
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GimpStroke *prev);
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gdouble (* stroke_get_length) (GimpPath *path,
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GimpStroke *stroke);
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GimpAnchor * (* anchor_get) (GimpPath *path,
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const GimpCoords *coord,
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GimpStroke **ret_stroke);
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void (* anchor_delete) (GimpPath *path,
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GimpAnchor *anchor);
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gdouble (* get_length) (GimpPath *path,
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const GimpAnchor *start);
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gdouble (* get_distance) (GimpPath *path,
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const GimpCoords *coord);
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gint (* interpolate) (GimpPath *path,
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GimpStroke *stroke,
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gdouble precision,
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gint max_points,
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GimpCoords *ret_coords);
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GimpBezierDesc * (* make_bezier) (GimpPath *path);
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};
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/* path utility functions */
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GType gimp_path_get_type (void) G_GNUC_CONST;
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GimpPath * gimp_path_new (GimpImage *image,
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const gchar *name);
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GimpPath * gimp_path_get_parent (GimpPath *path);
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void gimp_path_freeze (GimpPath *path);
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void gimp_path_thaw (GimpPath *path);
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void gimp_path_copy_strokes (GimpPath *src_path,
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GimpPath *dest_path);
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void gimp_path_add_strokes (GimpPath *src_path,
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GimpPath *dest_path);
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/* accessing / modifying the anchors */
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GimpAnchor * gimp_path_anchor_get (GimpPath *path,
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const GimpCoords *coord,
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GimpStroke **ret_stroke);
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/* prev == NULL: "first" anchor */
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GimpAnchor * gimp_path_anchor_get_next (GimpPath *path,
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const GimpAnchor *prev);
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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_path_anchor_move_relative (GimpPath *path,
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GimpAnchor *anchor,
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const GimpCoords *deltacoord,
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gint type);
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void gimp_path_anchor_move_absolute (GimpPath *path,
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GimpAnchor *anchor,
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const GimpCoords *coord,
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gint type);
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void gimp_path_anchor_delete (GimpPath *path,
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GimpAnchor *anchor);
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void gimp_path_anchor_select (GimpPath *path,
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GimpStroke *target_stroke,
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GimpAnchor *anchor,
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gboolean selected,
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gboolean exclusive);
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/* GimpStroke is a connected component of a GimpPath object */
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void gimp_path_stroke_add (GimpPath *path,
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GimpStroke *stroke);
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void gimp_path_stroke_remove (GimpPath *path,
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GimpStroke *stroke);
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gint gimp_path_get_n_strokes (GimpPath *path);
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GimpStroke * gimp_path_stroke_get (GimpPath *path,
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const GimpCoords *coord);
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GimpStroke * gimp_path_stroke_get_by_id (GimpPath *path,
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gint id);
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/* prev == NULL: "first" stroke */
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GimpStroke * gimp_path_stroke_get_next (GimpPath *path,
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GimpStroke *prev);
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gdouble gimp_path_stroke_get_length (GimpPath *path,
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GimpStroke *stroke);
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/* accessing the shape of the curve */
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gdouble gimp_path_get_length (GimpPath *path,
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const GimpAnchor *start);
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gdouble gimp_path_get_distance (GimpPath *path,
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const GimpCoords *coord);
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/* returns the number of valid coordinates */
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gint gimp_path_interpolate (GimpPath *path,
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GimpStroke *stroke,
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gdouble precision,
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gint max_points,
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GimpCoords *ret_coords);
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/* usually overloaded */
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/* returns a bezier representation */
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const GimpBezierDesc * gimp_path_get_bezier (GimpPath *path);
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#endif /* __GIMP_PATH_H__ */
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