mirror of https://github.com/GNOME/gimp.git
180 lines
8.4 KiB
C
180 lines
8.4 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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* gimpvectors.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_VECTORS_H__
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#define __GIMP_VECTORS_H__
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#include "core/gimpitem.h"
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#define GIMP_TYPE_VECTORS (gimp_vectors_get_type ())
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#define GIMP_VECTORS(obj) (G_TYPE_CHECK_INSTANCE_CAST ((obj), GIMP_TYPE_VECTORS, GimpVectors))
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#define GIMP_VECTORS_CLASS(klass) (G_TYPE_CHECK_CLASS_CAST ((klass), GIMP_TYPE_VECTORS, GimpVectorsClass))
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#define GIMP_IS_VECTORS(obj) (G_TYPE_CHECK_INSTANCE_TYPE ((obj), GIMP_TYPE_VECTORS))
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#define GIMP_IS_VECTORS_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE ((klass), GIMP_TYPE_VECTORS))
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#define GIMP_VECTORS_GET_CLASS(obj) (G_TYPE_INSTANCE_GET_CLASS ((obj), GIMP_TYPE_VECTORS, GimpVectorsClass))
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typedef struct _GimpVectorsClass GimpVectorsClass;
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struct _GimpVectors
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{
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GimpItem parent_instance;
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GList *strokes; /* The List of GimpStrokes */
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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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};
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struct _GimpVectorsClass
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{
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GimpItemClass parent_class;
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/* signals */
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void (* freeze) (GimpVectors *vectors);
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void (* thaw) (GimpVectors *vectors);
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/* virtual functions */
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void (* stroke_add) (GimpVectors *vectors,
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GimpStroke *stroke);
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void (* stroke_remove) (GimpVectors *vectors,
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GimpStroke *stroke);
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GimpStroke * (* stroke_get) (const GimpVectors *vectors,
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const GimpCoords *coord);
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GimpStroke * (* stroke_get_next) (const GimpVectors *vectors,
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const GimpStroke *prev);
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gdouble (* stroke_get_length) (const GimpVectors *vectors,
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const GimpStroke *stroke);
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GimpAnchor * (* anchor_get) (const GimpVectors *vectors,
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const GimpCoords *coord,
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GimpStroke **ret_stroke);
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void (* anchor_delete) (GimpVectors *vectors,
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GimpAnchor *anchor);
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gdouble (* get_length) (const GimpVectors *vectors,
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const GimpAnchor *start);
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gdouble (* get_distance) (const GimpVectors *vectors,
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const GimpCoords *coord);
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gint (* interpolate) (const GimpVectors *vectors,
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const 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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GimpVectors * (* make_bezier) (const GimpVectors *vectors);
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};
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/* vectors utility functions */
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GType gimp_vectors_get_type (void) G_GNUC_CONST;
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GimpVectors * gimp_vectors_new (GimpImage *gimage,
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const gchar *name);
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void gimp_vectors_freeze (GimpVectors *vectors);
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void gimp_vectors_thaw (GimpVectors *vectors);
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void gimp_vectors_copy_strokes (const GimpVectors *src_vectors,
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GimpVectors *dest_vectors);
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void gimp_vectors_add_strokes (const GimpVectors *src_vectors,
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GimpVectors *dest_vectors);
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/* accessing / modifying the anchors */
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GimpAnchor * gimp_vectors_anchor_get (const GimpVectors *vectors,
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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_vectors_anchor_get_next (const GimpVectors *vectors,
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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_vectors_anchor_move_relative (GimpVectors *vectors,
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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_vectors_anchor_move_absolute (GimpVectors *vectors,
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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_vectors_anchor_delete (GimpVectors *vectors,
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GimpAnchor *anchor);
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void gimp_vectors_anchor_select (GimpVectors *vectors,
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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 GimpVectors object */
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void gimp_vectors_stroke_add (GimpVectors *vectors,
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GimpStroke *stroke);
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void gimp_vectors_stroke_remove (GimpVectors *vectors,
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GimpStroke *stroke);
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GimpStroke * gimp_vectors_stroke_get_by_ID (const GimpVectors *vectors,
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gint id);
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GimpStroke * gimp_vectors_stroke_get (const GimpVectors *vectors,
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const GimpCoords *coord);
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/* prev == NULL: "first" stroke */
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GimpStroke * gimp_vectors_stroke_get_next (const GimpVectors *vectors,
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const GimpStroke *prev);
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gdouble gimp_vectors_stroke_get_length (const GimpVectors *vectors,
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const GimpStroke *stroke);
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/* accessing the shape of the curve */
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gdouble gimp_vectors_get_length (const GimpVectors *vectors,
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const GimpAnchor *start);
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gdouble gimp_vectors_get_distance (const GimpVectors *vectors,
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const GimpCoords *coord);
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gboolean gimp_vectors_bounds (const GimpVectors *vectors,
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gdouble *x1,
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gdouble *y1,
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gdouble *x2,
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gdouble *y2);
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/* returns the number of valid coordinates */
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gint gimp_vectors_interpolate (const GimpVectors *vectors,
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const 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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/* creates a bezier approximation. */
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GimpVectors * gimp_vectors_make_bezier (const GimpVectors *vectors);
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#endif /* __GIMP_VECTORS_H__ */
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