PIKApp/app/vectors/pikavectors.h

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2023-09-26 00:35:21 +02:00
/* PIKA - Photo and Image Kooker Application
* a rebranding of The GNU Image Manipulation Program (created with heckimp)
* A derived work which may be trivial. However, any changes may be (C)2023 by Aldercone Studio
*
* Original copyright, applying to most contents (license remains unchanged):
* Copyright (C) 1995 Spencer Kimball and Peter Mattis
*
* pikavectors.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 3 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, see <https://www.gnu.org/licenses/>.
*/
#ifndef __PIKA_VECTORS_H__
#define __PIKA_VECTORS_H__
#include "core/pikaitem.h"
#define PIKA_TYPE_VECTORS (pika_vectors_get_type ())
#define PIKA_VECTORS(obj) (G_TYPE_CHECK_INSTANCE_CAST ((obj), PIKA_TYPE_VECTORS, PikaVectors))
#define PIKA_VECTORS_CLASS(klass) (G_TYPE_CHECK_CLASS_CAST ((klass), PIKA_TYPE_VECTORS, PikaVectorsClass))
#define PIKA_IS_VECTORS(obj) (G_TYPE_CHECK_INSTANCE_TYPE ((obj), PIKA_TYPE_VECTORS))
#define PIKA_IS_VECTORS_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE ((klass), PIKA_TYPE_VECTORS))
#define PIKA_VECTORS_GET_CLASS(obj) (G_TYPE_INSTANCE_GET_CLASS ((obj), PIKA_TYPE_VECTORS, PikaVectorsClass))
typedef struct _PikaVectorsClass PikaVectorsClass;
struct _PikaVectors
{
PikaItem parent_instance;
GQueue *strokes; /* Queue of PikaStrokes */
GHashTable *stroke_to_list; /* Map from PikaStroke to strokes listnode */
gint last_stroke_id;
gint freeze_count;
gdouble precision;
PikaBezierDesc *bezier_desc; /* Cached bezier representation */
gboolean bounds_valid; /* Cached bounding box */
gboolean bounds_empty;
gdouble bounds_x1;
gdouble bounds_y1;
gdouble bounds_x2;
gdouble bounds_y2;
};
struct _PikaVectorsClass
{
PikaItemClass parent_class;
/* signals */
void (* freeze) (PikaVectors *vectors);
void (* thaw) (PikaVectors *vectors);
/* virtual functions */
void (* stroke_add) (PikaVectors *vectors,
PikaStroke *stroke);
void (* stroke_remove) (PikaVectors *vectors,
PikaStroke *stroke);
PikaStroke * (* stroke_get) (PikaVectors *vectors,
const PikaCoords *coord);
PikaStroke * (* stroke_get_next) (PikaVectors *vectors,
PikaStroke *prev);
gdouble (* stroke_get_length) (PikaVectors *vectors,
PikaStroke *stroke);
PikaAnchor * (* anchor_get) (PikaVectors *vectors,
const PikaCoords *coord,
PikaStroke **ret_stroke);
void (* anchor_delete) (PikaVectors *vectors,
PikaAnchor *anchor);
gdouble (* get_length) (PikaVectors *vectors,
const PikaAnchor *start);
gdouble (* get_distance) (PikaVectors *vectors,
const PikaCoords *coord);
gint (* interpolate) (PikaVectors *vectors,
PikaStroke *stroke,
gdouble precision,
gint max_points,
PikaCoords *ret_coords);
PikaBezierDesc * (* make_bezier) (PikaVectors *vectors);
};
/* vectors utility functions */
GType pika_vectors_get_type (void) G_GNUC_CONST;
PikaVectors * pika_vectors_new (PikaImage *image,
const gchar *name);
PikaVectors * pika_vectors_get_parent (PikaVectors *vectors);
void pika_vectors_freeze (PikaVectors *vectors);
void pika_vectors_thaw (PikaVectors *vectors);
void pika_vectors_copy_strokes (PikaVectors *src_vectors,
PikaVectors *dest_vectors);
void pika_vectors_add_strokes (PikaVectors *src_vectors,
PikaVectors *dest_vectors);
/* accessing / modifying the anchors */
PikaAnchor * pika_vectors_anchor_get (PikaVectors *vectors,
const PikaCoords *coord,
PikaStroke **ret_stroke);
/* prev == NULL: "first" anchor */
PikaAnchor * pika_vectors_anchor_get_next (PikaVectors *vectors,
const PikaAnchor *prev);
/* type will be an xorable enum:
* VECTORS_NONE, VECTORS_FIX_ANGLE, VECTORS_FIX_RATIO, VECTORS_RESTRICT_ANGLE
* or so.
*/
void pika_vectors_anchor_move_relative (PikaVectors *vectors,
PikaAnchor *anchor,
const PikaCoords *deltacoord,
gint type);
void pika_vectors_anchor_move_absolute (PikaVectors *vectors,
PikaAnchor *anchor,
const PikaCoords *coord,
gint type);
void pika_vectors_anchor_delete (PikaVectors *vectors,
PikaAnchor *anchor);
void pika_vectors_anchor_select (PikaVectors *vectors,
PikaStroke *target_stroke,
PikaAnchor *anchor,
gboolean selected,
gboolean exclusive);
/* PikaStroke is a connected component of a PikaVectors object */
void pika_vectors_stroke_add (PikaVectors *vectors,
PikaStroke *stroke);
void pika_vectors_stroke_remove (PikaVectors *vectors,
PikaStroke *stroke);
gint pika_vectors_get_n_strokes (PikaVectors *vectors);
PikaStroke * pika_vectors_stroke_get (PikaVectors *vectors,
const PikaCoords *coord);
PikaStroke * pika_vectors_stroke_get_by_id (PikaVectors *vectors,
gint id);
/* prev == NULL: "first" stroke */
PikaStroke * pika_vectors_stroke_get_next (PikaVectors *vectors,
PikaStroke *prev);
gdouble pika_vectors_stroke_get_length (PikaVectors *vectors,
PikaStroke *stroke);
/* accessing the shape of the curve */
gdouble pika_vectors_get_length (PikaVectors *vectors,
const PikaAnchor *start);
gdouble pika_vectors_get_distance (PikaVectors *vectors,
const PikaCoords *coord);
/* returns the number of valid coordinates */
gint pika_vectors_interpolate (PikaVectors *vectors,
PikaStroke *stroke,
gdouble precision,
gint max_points,
PikaCoords *ret_coords);
/* usually overloaded */
/* returns a bezier representation */
const PikaBezierDesc * pika_vectors_get_bezier (PikaVectors *vectors);
#endif /* __PIKA_VECTORS_H__ */