mirror of https://github.com/GNOME/gimp.git
342 lines
20 KiB
C
342 lines
20 KiB
C
/* GIMP - The GNU Image Manipulation Program
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* Copyright (C) 1995 Spencer Kimball and Peter Mattis
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*
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* gimpstroke.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 <http://www.gnu.org/licenses/>.
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*/
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#ifndef __GIMP_STROKE_H__
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#define __GIMP_STROKE_H__
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#include "core/gimpobject.h"
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#define GIMP_TYPE_STROKE (gimp_stroke_get_type ())
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#define GIMP_STROKE(obj) (G_TYPE_CHECK_INSTANCE_CAST ((obj), GIMP_TYPE_STROKE, GimpStroke))
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#define GIMP_STROKE_CLASS(klass) (G_TYPE_CHECK_CLASS_CAST ((klass), GIMP_TYPE_STROKE, GimpStrokeClass))
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#define GIMP_IS_STROKE(obj) (G_TYPE_CHECK_INSTANCE_TYPE ((obj), GIMP_TYPE_STROKE))
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#define GIMP_IS_STROKE_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE ((klass), GIMP_TYPE_STROKE))
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#define GIMP_STROKE_GET_CLASS(obj) (G_TYPE_INSTANCE_GET_CLASS ((obj), GIMP_TYPE_STROKE, GimpStrokeClass))
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typedef struct _GimpStrokeClass GimpStrokeClass;
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struct _GimpStroke
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{
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GimpObject parent_instance;
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gint ID;
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GList *anchors;
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gboolean closed;
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};
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struct _GimpStrokeClass
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{
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GimpObjectClass parent_class;
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void (* changed) (GimpStroke *stroke);
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void (* removed) (GimpStroke *stroke);
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GimpAnchor * (* anchor_get) (const GimpStroke *stroke,
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const GimpCoords *coord);
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gdouble (* nearest_point_get) (const GimpStroke *stroke,
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const GimpCoords *coord,
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const gdouble precision,
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GimpCoords *ret_point,
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GimpAnchor **ret_segment_start,
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GimpAnchor **ret_segment_end,
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gdouble *ret_pos);
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gdouble (* nearest_tangent_get) (const GimpStroke *stroke,
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const GimpCoords *coord1,
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const GimpCoords *coord2,
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const gdouble precision,
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GimpCoords *nearest,
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GimpAnchor **ret_segment_start,
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GimpAnchor **ret_segment_end,
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gdouble *ret_pos);
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gdouble (* nearest_intersection_get)
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(const GimpStroke *stroke,
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const GimpCoords *coord1,
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const GimpCoords *direction,
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const gdouble precision,
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GimpCoords *nearest,
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GimpAnchor **ret_segment_start,
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GimpAnchor **ret_segment_end,
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gdouble *ret_pos);
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GimpAnchor * (* anchor_get_next) (const GimpStroke *stroke,
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const GimpAnchor *prev);
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void (* anchor_select) (GimpStroke *stroke,
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GimpAnchor *anchor,
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gboolean selected,
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gboolean exclusive);
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void (* anchor_move_relative) (GimpStroke *stroke,
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GimpAnchor *anchor,
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const GimpCoords *deltacoord,
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GimpAnchorFeatureType feature);
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void (* anchor_move_absolute) (GimpStroke *stroke,
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GimpAnchor *anchor,
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const GimpCoords *coord,
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GimpAnchorFeatureType feature);
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void (* anchor_convert) (GimpStroke *stroke,
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GimpAnchor *anchor,
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GimpAnchorFeatureType feature);
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void (* anchor_delete) (GimpStroke *stroke,
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GimpAnchor *anchor);
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gboolean (* point_is_movable) (GimpStroke *stroke,
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GimpAnchor *predec,
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gdouble position);
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void (* point_move_relative) (GimpStroke *stroke,
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GimpAnchor *predec,
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gdouble position,
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const GimpCoords *deltacoord,
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GimpAnchorFeatureType feature);
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void (* point_move_absolute) (GimpStroke *stroke,
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GimpAnchor *predec,
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gdouble position,
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const GimpCoords *coord,
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GimpAnchorFeatureType feature);
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void (* close) (GimpStroke *stroke);
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GimpStroke * (* open) (GimpStroke *stroke,
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GimpAnchor *end_anchor);
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gboolean (* anchor_is_insertable) (GimpStroke *stroke,
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GimpAnchor *predec,
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gdouble position);
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GimpAnchor * (* anchor_insert) (GimpStroke *stroke,
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GimpAnchor *predec,
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gdouble position);
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gboolean (* is_extendable) (GimpStroke *stroke,
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GimpAnchor *neighbor);
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GimpAnchor * (* extend) (GimpStroke *stroke,
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const GimpCoords *coords,
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GimpAnchor *neighbor,
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GimpVectorExtendMode extend_mode);
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gboolean (* connect_stroke) (GimpStroke *stroke,
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GimpAnchor *anchor,
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GimpStroke *extension,
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GimpAnchor *neighbor);
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gboolean (* is_empty) (const GimpStroke *stroke);
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gdouble (* get_length) (const GimpStroke *stroke,
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const gdouble precision);
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gdouble (* get_distance) (const GimpStroke *stroke,
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const GimpCoords *coord);
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gboolean (* get_point_at_dist) (const GimpStroke *stroke,
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const gdouble dist,
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const gdouble precision,
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GimpCoords *position,
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gdouble *slope);
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GArray * (* interpolate) (const GimpStroke *stroke,
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const gdouble precision,
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gboolean *ret_closed);
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GimpStroke * (* duplicate) (const GimpStroke *stroke);
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GimpBezierDesc * (* make_bezier) (const GimpStroke *stroke);
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void (* translate) (GimpStroke *stroke,
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gdouble offset_x,
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gdouble offset_y);
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void (* scale) (GimpStroke *stroke,
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gdouble scale_x,
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gdouble scale_y);
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void (* rotate) (GimpStroke *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) (GimpStroke *stroke,
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GimpOrientationType flip_type,
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gdouble axis);
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void (* flip_free) (GimpStroke *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) (GimpStroke *stroke,
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const GimpMatrix3 *matrix);
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GList * (* get_draw_anchors) (const GimpStroke *stroke);
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GList * (* get_draw_controls) (const GimpStroke *stroke);
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GArray * (* get_draw_lines) (const GimpStroke *stroke);
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GArray * (* control_points_get) (const GimpStroke *stroke,
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gboolean *ret_closed);
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};
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GType gimp_stroke_get_type (void) G_GNUC_CONST;
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void gimp_stroke_set_ID (GimpStroke *stroke,
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gint id);
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gint gimp_stroke_get_ID (const GimpStroke *stroke);
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/* accessing / modifying the anchors */
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GArray * gimp_stroke_control_points_get (const GimpStroke *stroke,
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gboolean *closed);
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GimpAnchor * gimp_stroke_anchor_get (const GimpStroke *stroke,
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const GimpCoords *coord);
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gdouble gimp_stroke_nearest_point_get (const GimpStroke *stroke,
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const GimpCoords *coord,
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const gdouble precision,
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GimpCoords *ret_point,
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GimpAnchor **ret_segment_start,
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GimpAnchor **ret_segment_end,
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gdouble *ret_pos);
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gdouble gimp_stroke_nearest_tangent_get (const GimpStroke *stroke,
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const GimpCoords *coords1,
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const GimpCoords *coords2,
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gdouble precision,
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GimpCoords *nearest,
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GimpAnchor **ret_segment_start,
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GimpAnchor **ret_segment_end,
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gdouble *ret_pos);
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gdouble gimp_stroke_nearest_intersection_get (const GimpStroke *stroke,
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const GimpCoords *coords1,
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const GimpCoords *direction,
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gdouble precision,
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GimpCoords *nearest,
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GimpAnchor **ret_segment_start,
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GimpAnchor **ret_segment_end,
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gdouble *ret_pos);
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/* prev == NULL: "first" anchor */
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GimpAnchor * gimp_stroke_anchor_get_next (const GimpStroke *stroke,
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const GimpAnchor *prev);
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void gimp_stroke_anchor_select (GimpStroke *stroke,
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GimpAnchor *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 gimp_stroke_anchor_move_relative (GimpStroke *stroke,
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GimpAnchor *anchor,
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const GimpCoords *delta,
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GimpAnchorFeatureType feature);
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void gimp_stroke_anchor_move_absolute (GimpStroke *stroke,
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GimpAnchor *anchor,
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const GimpCoords *coord,
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GimpAnchorFeatureType feature);
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gboolean gimp_stroke_point_is_movable (GimpStroke *stroke,
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GimpAnchor *predec,
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gdouble position);
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void gimp_stroke_point_move_relative (GimpStroke *stroke,
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GimpAnchor *predec,
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gdouble position,
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const GimpCoords *deltacoord,
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GimpAnchorFeatureType feature);
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void gimp_stroke_point_move_absolute (GimpStroke *stroke,
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GimpAnchor *predec,
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gdouble position,
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const GimpCoords *coord,
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GimpAnchorFeatureType feature);
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void gimp_stroke_close (GimpStroke *stroke);
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void gimp_stroke_anchor_convert (GimpStroke *stroke,
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GimpAnchor *anchor,
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GimpAnchorFeatureType feature);
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void gimp_stroke_anchor_delete (GimpStroke *stroke,
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GimpAnchor *anchor);
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GimpStroke * gimp_stroke_open (GimpStroke *stroke,
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GimpAnchor *end_anchor);
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gboolean gimp_stroke_anchor_is_insertable (GimpStroke *stroke,
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GimpAnchor *predec,
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gdouble position);
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GimpAnchor * gimp_stroke_anchor_insert (GimpStroke *stroke,
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GimpAnchor *predec,
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gdouble position);
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gboolean gimp_stroke_is_extendable (GimpStroke *stroke,
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GimpAnchor *neighbor);
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GimpAnchor * gimp_stroke_extend (GimpStroke *stroke,
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const GimpCoords *coords,
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GimpAnchor *neighbor,
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GimpVectorExtendMode extend_mode);
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gboolean gimp_stroke_connect_stroke (GimpStroke *stroke,
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GimpAnchor *anchor,
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GimpStroke *extension,
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GimpAnchor *neighbor);
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gboolean gimp_stroke_is_empty (const GimpStroke *stroke);
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/* accessing the shape of the curve */
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gdouble gimp_stroke_get_length (const GimpStroke *stroke,
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const gdouble precision);
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gdouble gimp_stroke_get_distance (const GimpStroke *stroke,
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const GimpCoords *coord);
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gboolean gimp_stroke_get_point_at_dist (const GimpStroke *stroke,
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const gdouble dist,
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const gdouble precision,
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GimpCoords *position,
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gdouble *slope);
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/* returns an array of valid coordinates */
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GArray * gimp_stroke_interpolate (const GimpStroke *stroke,
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const gdouble precision,
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gboolean *closed);
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GimpStroke * gimp_stroke_duplicate (const GimpStroke *stroke);
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/* creates a bezier approximation. */
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GimpBezierDesc * gimp_stroke_make_bezier (const GimpStroke *stroke);
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void gimp_stroke_translate (GimpStroke *stroke,
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gdouble offset_x,
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gdouble offset_y);
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void gimp_stroke_scale (GimpStroke *stroke,
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gdouble scale_x,
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gdouble scale_y);
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void gimp_stroke_rotate (GimpStroke *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 gimp_stroke_flip (GimpStroke *stroke,
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GimpOrientationType flip_type,
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gdouble axis);
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void gimp_stroke_flip_free (GimpStroke *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 gimp_stroke_transform (GimpStroke *stroke,
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const GimpMatrix3 *matrix);
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GList * gimp_stroke_get_draw_anchors (const GimpStroke *stroke);
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GList * gimp_stroke_get_draw_controls (const GimpStroke *stroke);
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GArray * gimp_stroke_get_draw_lines (const GimpStroke *stroke);
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#endif /* __GIMP_STROKE_H__ */
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