356 lines
21 KiB
C
356 lines
21 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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* pikastroke.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_STROKE_H__
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#define __PIKA_STROKE_H__
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#include "core/pikaobject.h"
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#define PIKA_TYPE_STROKE (pika_stroke_get_type ())
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#define PIKA_STROKE(obj) (G_TYPE_CHECK_INSTANCE_CAST ((obj), PIKA_TYPE_STROKE, PikaStroke))
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#define PIKA_STROKE_CLASS(klass) (G_TYPE_CHECK_CLASS_CAST ((klass), PIKA_TYPE_STROKE, PikaStrokeClass))
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#define PIKA_IS_STROKE(obj) (G_TYPE_CHECK_INSTANCE_TYPE ((obj), PIKA_TYPE_STROKE))
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#define PIKA_IS_STROKE_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE ((klass), PIKA_TYPE_STROKE))
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#define PIKA_STROKE_GET_CLASS(obj) (G_TYPE_INSTANCE_GET_CLASS ((obj), PIKA_TYPE_STROKE, PikaStrokeClass))
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typedef struct _PikaStrokeClass PikaStrokeClass;
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struct _PikaStroke
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{
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PikaObject parent_instance;
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gint id;
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GQueue *anchors;
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gboolean closed;
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};
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struct _PikaStrokeClass
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{
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PikaObjectClass parent_class;
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void (* changed) (PikaStroke *stroke);
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void (* removed) (PikaStroke *stroke);
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PikaAnchor * (* anchor_get) (PikaStroke *stroke,
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const PikaCoords *coord);
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gdouble (* nearest_point_get) (PikaStroke *stroke,
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const PikaCoords *coord,
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gdouble precision,
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PikaCoords *ret_point,
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PikaAnchor **ret_segment_start,
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PikaAnchor **ret_segment_end,
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gdouble *ret_pos);
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gdouble (* nearest_tangent_get) (PikaStroke *stroke,
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const PikaCoords *coord1,
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const PikaCoords *coord2,
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gdouble precision,
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PikaCoords *nearest,
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PikaAnchor **ret_segment_start,
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PikaAnchor **ret_segment_end,
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gdouble *ret_pos);
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gdouble (* nearest_intersection_get)
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(PikaStroke *stroke,
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const PikaCoords *coord1,
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const PikaCoords *direction,
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gdouble precision,
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PikaCoords *nearest,
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PikaAnchor **ret_segment_start,
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PikaAnchor **ret_segment_end,
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gdouble *ret_pos);
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PikaAnchor * (* anchor_get_next) (PikaStroke *stroke,
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const PikaAnchor *prev);
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void (* anchor_select) (PikaStroke *stroke,
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PikaAnchor *anchor,
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gboolean selected,
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gboolean exclusive);
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void (* anchor_move_relative) (PikaStroke *stroke,
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PikaAnchor *anchor,
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const PikaCoords *deltacoord,
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PikaAnchorFeatureType feature);
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void (* anchor_move_absolute) (PikaStroke *stroke,
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PikaAnchor *anchor,
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const PikaCoords *coord,
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PikaAnchorFeatureType feature);
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void (* anchor_convert) (PikaStroke *stroke,
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PikaAnchor *anchor,
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PikaAnchorFeatureType feature);
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void (* anchor_delete) (PikaStroke *stroke,
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PikaAnchor *anchor);
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gboolean (* point_is_movable) (PikaStroke *stroke,
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PikaAnchor *predec,
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gdouble position);
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void (* point_move_relative) (PikaStroke *stroke,
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PikaAnchor *predec,
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gdouble position,
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const PikaCoords *deltacoord,
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PikaAnchorFeatureType feature);
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void (* point_move_absolute) (PikaStroke *stroke,
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PikaAnchor *predec,
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gdouble position,
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const PikaCoords *coord,
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PikaAnchorFeatureType feature);
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void (* close) (PikaStroke *stroke);
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PikaStroke * (* open) (PikaStroke *stroke,
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PikaAnchor *end_anchor);
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gboolean (* anchor_is_insertable) (PikaStroke *stroke,
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PikaAnchor *predec,
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gdouble position);
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PikaAnchor * (* anchor_insert) (PikaStroke *stroke,
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PikaAnchor *predec,
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gdouble position);
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gboolean (* is_extendable) (PikaStroke *stroke,
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PikaAnchor *neighbor);
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PikaAnchor * (* extend) (PikaStroke *stroke,
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const PikaCoords *coords,
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PikaAnchor *neighbor,
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PikaVectorExtendMode extend_mode);
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gboolean (* connect_stroke) (PikaStroke *stroke,
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PikaAnchor *anchor,
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PikaStroke *extension,
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PikaAnchor *neighbor);
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gboolean (* is_empty) (PikaStroke *stroke);
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gboolean (* reverse) (PikaStroke *stroke);
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gboolean (* shift_start) (PikaStroke *stroke,
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PikaAnchor *new_start);
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gdouble (* get_length) (PikaStroke *stroke,
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gdouble precision);
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gdouble (* get_distance) (PikaStroke *stroke,
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const PikaCoords *coord);
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gboolean (* get_point_at_dist) (PikaStroke *stroke,
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gdouble dist,
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gdouble precision,
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PikaCoords *position,
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gdouble *slope);
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GArray * (* interpolate) (PikaStroke *stroke,
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gdouble precision,
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gboolean *ret_closed);
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PikaStroke * (* duplicate) (PikaStroke *stroke);
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PikaBezierDesc * (* make_bezier) (PikaStroke *stroke);
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void (* translate) (PikaStroke *stroke,
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gdouble offset_x,
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gdouble offset_y);
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void (* scale) (PikaStroke *stroke,
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gdouble scale_x,
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gdouble scale_y);
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void (* rotate) (PikaStroke *stroke,
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gdouble center_x,
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gdouble center_y,
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gdouble angle);
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void (* flip) (PikaStroke *stroke,
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PikaOrientationType flip_type,
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gdouble axis);
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void (* flip_free) (PikaStroke *stroke,
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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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void (* transform) (PikaStroke *stroke,
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const PikaMatrix3 *matrix,
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GQueue *ret_strokes);
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GList * (* get_draw_anchors) (PikaStroke *stroke);
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GList * (* get_draw_controls) (PikaStroke *stroke);
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GArray * (* get_draw_lines) (PikaStroke *stroke);
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GArray * (* control_points_get) (PikaStroke *stroke,
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gboolean *ret_closed);
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};
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GType pika_stroke_get_type (void) G_GNUC_CONST;
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void pika_stroke_set_id (PikaStroke *stroke,
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gint id);
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gint pika_stroke_get_id (PikaStroke *stroke);
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/* accessing / modifying the anchors */
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GArray * pika_stroke_control_points_get (PikaStroke *stroke,
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gboolean *closed);
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PikaAnchor * pika_stroke_anchor_get (PikaStroke *stroke,
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const PikaCoords *coord);
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gdouble pika_stroke_nearest_point_get (PikaStroke *stroke,
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const PikaCoords *coord,
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gdouble precision,
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PikaCoords *ret_point,
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PikaAnchor **ret_segment_start,
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PikaAnchor **ret_segment_end,
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gdouble *ret_pos);
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gdouble pika_stroke_nearest_tangent_get (PikaStroke *stroke,
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const PikaCoords *coords1,
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const PikaCoords *coords2,
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gdouble precision,
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PikaCoords *nearest,
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PikaAnchor **ret_segment_start,
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PikaAnchor **ret_segment_end,
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gdouble *ret_pos);
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gdouble pika_stroke_nearest_intersection_get (PikaStroke *stroke,
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const PikaCoords *coords1,
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const PikaCoords *direction,
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gdouble precision,
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PikaCoords *nearest,
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PikaAnchor **ret_segment_start,
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PikaAnchor **ret_segment_end,
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gdouble *ret_pos);
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/* prev == NULL: "first" anchor */
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PikaAnchor * pika_stroke_anchor_get_next (PikaStroke *stroke,
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const PikaAnchor *prev);
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void pika_stroke_anchor_select (PikaStroke *stroke,
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PikaAnchor *anchor,
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gboolean selected,
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gboolean exclusive);
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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_stroke_anchor_move_relative (PikaStroke *stroke,
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PikaAnchor *anchor,
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const PikaCoords *delta,
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PikaAnchorFeatureType feature);
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void pika_stroke_anchor_move_absolute (PikaStroke *stroke,
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PikaAnchor *anchor,
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const PikaCoords *coord,
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PikaAnchorFeatureType feature);
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gboolean pika_stroke_point_is_movable (PikaStroke *stroke,
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PikaAnchor *predec,
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gdouble position);
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void pika_stroke_point_move_relative (PikaStroke *stroke,
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PikaAnchor *predec,
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gdouble position,
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const PikaCoords *deltacoord,
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PikaAnchorFeatureType feature);
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void pika_stroke_point_move_absolute (PikaStroke *stroke,
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PikaAnchor *predec,
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gdouble position,
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const PikaCoords *coord,
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PikaAnchorFeatureType feature);
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void pika_stroke_close (PikaStroke *stroke);
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void pika_stroke_anchor_convert (PikaStroke *stroke,
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PikaAnchor *anchor,
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PikaAnchorFeatureType feature);
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void pika_stroke_anchor_delete (PikaStroke *stroke,
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PikaAnchor *anchor);
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PikaStroke * pika_stroke_open (PikaStroke *stroke,
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PikaAnchor *end_anchor);
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gboolean pika_stroke_anchor_is_insertable (PikaStroke *stroke,
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PikaAnchor *predec,
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gdouble position);
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PikaAnchor * pika_stroke_anchor_insert (PikaStroke *stroke,
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PikaAnchor *predec,
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gdouble position);
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gboolean pika_stroke_is_extendable (PikaStroke *stroke,
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PikaAnchor *neighbor);
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PikaAnchor * pika_stroke_extend (PikaStroke *stroke,
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const PikaCoords *coords,
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PikaAnchor *neighbor,
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PikaVectorExtendMode extend_mode);
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gboolean pika_stroke_connect_stroke (PikaStroke *stroke,
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PikaAnchor *anchor,
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PikaStroke *extension,
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PikaAnchor *neighbor);
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gboolean pika_stroke_is_empty (PikaStroke *stroke);
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gboolean pika_stroke_reverse (PikaStroke *stroke);
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gboolean pika_stroke_shift_start (PikaStroke *stroke,
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PikaAnchor *new_start);
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/* accessing the shape of the curve */
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gdouble pika_stroke_get_length (PikaStroke *stroke,
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gdouble precision);
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gdouble pika_stroke_get_distance (PikaStroke *stroke,
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const PikaCoords *coord);
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gboolean pika_stroke_get_point_at_dist (PikaStroke *stroke,
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gdouble dist,
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gdouble precision,
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PikaCoords *position,
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gdouble *slope);
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/* returns an array of valid coordinates */
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GArray * pika_stroke_interpolate (PikaStroke *stroke,
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const gdouble precision,
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gboolean *closed);
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PikaStroke * pika_stroke_duplicate (PikaStroke *stroke);
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/* creates a bezier approximation. */
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PikaBezierDesc * pika_stroke_make_bezier (PikaStroke *stroke);
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void pika_stroke_translate (PikaStroke *stroke,
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gdouble offset_x,
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gdouble offset_y);
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void pika_stroke_scale (PikaStroke *stroke,
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gdouble scale_x,
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gdouble scale_y);
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void pika_stroke_rotate (PikaStroke *stroke,
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gdouble center_x,
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gdouble center_y,
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gdouble angle);
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void pika_stroke_flip (PikaStroke *stroke,
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PikaOrientationType flip_type,
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gdouble axis);
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void pika_stroke_flip_free (PikaStroke *stroke,
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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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void pika_stroke_transform (PikaStroke *stroke,
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const PikaMatrix3 *matrix,
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GQueue *ret_strokes);
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GList * pika_stroke_get_draw_anchors (PikaStroke *stroke);
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GList * pika_stroke_get_draw_controls (PikaStroke *stroke);
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GArray * pika_stroke_get_draw_lines (PikaStroke *stroke);
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#endif /* __PIKA_STROKE_H__ */
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