189 lines
8.8 KiB
C
189 lines
8.8 KiB
C
/* PIKA - Photo and Image Kooker Application
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* a rebranding of The GNU Image Manipulation Program (created with heckimp)
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* A derived work which may be trivial. However, any changes may be (C)2023 by Aldercone Studio
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*
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* Original copyright, applying to most contents (license remains unchanged):
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* Copyright (C) 1995 Spencer Kimball and Peter Mattis
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*
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* pikavectors.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 __PIKA_VECTORS_H__
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#define __PIKA_VECTORS_H__
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#include "core/pikaitem.h"
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#define PIKA_TYPE_VECTORS (pika_vectors_get_type ())
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#define PIKA_VECTORS(obj) (G_TYPE_CHECK_INSTANCE_CAST ((obj), PIKA_TYPE_VECTORS, PikaVectors))
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#define PIKA_VECTORS_CLASS(klass) (G_TYPE_CHECK_CLASS_CAST ((klass), PIKA_TYPE_VECTORS, PikaVectorsClass))
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#define PIKA_IS_VECTORS(obj) (G_TYPE_CHECK_INSTANCE_TYPE ((obj), PIKA_TYPE_VECTORS))
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#define PIKA_IS_VECTORS_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE ((klass), PIKA_TYPE_VECTORS))
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#define PIKA_VECTORS_GET_CLASS(obj) (G_TYPE_INSTANCE_GET_CLASS ((obj), PIKA_TYPE_VECTORS, PikaVectorsClass))
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typedef struct _PikaVectorsClass PikaVectorsClass;
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struct _PikaVectors
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{
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PikaItem parent_instance;
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GQueue *strokes; /* Queue of PikaStrokes */
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GHashTable *stroke_to_list; /* Map from PikaStroke 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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PikaBezierDesc *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 _PikaVectorsClass
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{
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PikaItemClass parent_class;
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/* signals */
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void (* freeze) (PikaVectors *vectors);
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void (* thaw) (PikaVectors *vectors);
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/* virtual functions */
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void (* stroke_add) (PikaVectors *vectors,
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PikaStroke *stroke);
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void (* stroke_remove) (PikaVectors *vectors,
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PikaStroke *stroke);
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PikaStroke * (* stroke_get) (PikaVectors *vectors,
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const PikaCoords *coord);
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PikaStroke * (* stroke_get_next) (PikaVectors *vectors,
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PikaStroke *prev);
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gdouble (* stroke_get_length) (PikaVectors *vectors,
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PikaStroke *stroke);
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PikaAnchor * (* anchor_get) (PikaVectors *vectors,
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const PikaCoords *coord,
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PikaStroke **ret_stroke);
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void (* anchor_delete) (PikaVectors *vectors,
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PikaAnchor *anchor);
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gdouble (* get_length) (PikaVectors *vectors,
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const PikaAnchor *start);
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gdouble (* get_distance) (PikaVectors *vectors,
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const PikaCoords *coord);
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gint (* interpolate) (PikaVectors *vectors,
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PikaStroke *stroke,
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gdouble precision,
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gint max_points,
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PikaCoords *ret_coords);
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PikaBezierDesc * (* make_bezier) (PikaVectors *vectors);
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};
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/* vectors utility functions */
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GType pika_vectors_get_type (void) G_GNUC_CONST;
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PikaVectors * pika_vectors_new (PikaImage *image,
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const gchar *name);
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PikaVectors * pika_vectors_get_parent (PikaVectors *vectors);
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void pika_vectors_freeze (PikaVectors *vectors);
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void pika_vectors_thaw (PikaVectors *vectors);
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void pika_vectors_copy_strokes (PikaVectors *src_vectors,
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PikaVectors *dest_vectors);
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void pika_vectors_add_strokes (PikaVectors *src_vectors,
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PikaVectors *dest_vectors);
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/* accessing / modifying the anchors */
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PikaAnchor * pika_vectors_anchor_get (PikaVectors *vectors,
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const PikaCoords *coord,
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PikaStroke **ret_stroke);
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/* prev == NULL: "first" anchor */
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PikaAnchor * pika_vectors_anchor_get_next (PikaVectors *vectors,
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const PikaAnchor *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 pika_vectors_anchor_move_relative (PikaVectors *vectors,
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PikaAnchor *anchor,
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const PikaCoords *deltacoord,
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gint type);
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void pika_vectors_anchor_move_absolute (PikaVectors *vectors,
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PikaAnchor *anchor,
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const PikaCoords *coord,
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gint type);
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void pika_vectors_anchor_delete (PikaVectors *vectors,
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PikaAnchor *anchor);
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void pika_vectors_anchor_select (PikaVectors *vectors,
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PikaStroke *target_stroke,
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PikaAnchor *anchor,
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gboolean selected,
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gboolean exclusive);
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/* PikaStroke is a connected component of a PikaVectors object */
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void pika_vectors_stroke_add (PikaVectors *vectors,
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PikaStroke *stroke);
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void pika_vectors_stroke_remove (PikaVectors *vectors,
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PikaStroke *stroke);
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gint pika_vectors_get_n_strokes (PikaVectors *vectors);
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PikaStroke * pika_vectors_stroke_get (PikaVectors *vectors,
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const PikaCoords *coord);
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PikaStroke * pika_vectors_stroke_get_by_id (PikaVectors *vectors,
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gint id);
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/* prev == NULL: "first" stroke */
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PikaStroke * pika_vectors_stroke_get_next (PikaVectors *vectors,
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PikaStroke *prev);
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gdouble pika_vectors_stroke_get_length (PikaVectors *vectors,
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PikaStroke *stroke);
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/* accessing the shape of the curve */
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gdouble pika_vectors_get_length (PikaVectors *vectors,
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const PikaAnchor *start);
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gdouble pika_vectors_get_distance (PikaVectors *vectors,
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const PikaCoords *coord);
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/* returns the number of valid coordinates */
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gint pika_vectors_interpolate (PikaVectors *vectors,
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PikaStroke *stroke,
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gdouble precision,
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gint max_points,
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PikaCoords *ret_coords);
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/* usually overloaded */
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/* returns a bezier representation */
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const PikaBezierDesc * pika_vectors_get_bezier (PikaVectors *vectors);
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#endif /* __PIKA_VECTORS_H__ */
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