/* 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 * * 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 . */ #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__ */