/* GIMP - The GNU Image Manipulation Program * Copyright (C) 1995 Spencer Kimball and Peter Mattis * * gimpstroke.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 __GIMP_STROKE_H__ #define __GIMP_STROKE_H__ #include "core/gimpobject.h" #define GIMP_TYPE_STROKE (gimp_stroke_get_type ()) #define GIMP_STROKE(obj) (G_TYPE_CHECK_INSTANCE_CAST ((obj), GIMP_TYPE_STROKE, GimpStroke)) #define GIMP_STROKE_CLASS(klass) (G_TYPE_CHECK_CLASS_CAST ((klass), GIMP_TYPE_STROKE, GimpStrokeClass)) #define GIMP_IS_STROKE(obj) (G_TYPE_CHECK_INSTANCE_TYPE ((obj), GIMP_TYPE_STROKE)) #define GIMP_IS_STROKE_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE ((klass), GIMP_TYPE_STROKE)) #define GIMP_STROKE_GET_CLASS(obj) (G_TYPE_INSTANCE_GET_CLASS ((obj), GIMP_TYPE_STROKE, GimpStrokeClass)) typedef struct _GimpStrokeClass GimpStrokeClass; struct _GimpStroke { GimpObject parent_instance; gint ID; GList *anchors; gboolean closed; }; struct _GimpStrokeClass { GimpObjectClass parent_class; void (* changed) (GimpStroke *stroke); void (* removed) (GimpStroke *stroke); GimpAnchor * (* anchor_get) (const GimpStroke *stroke, const GimpCoords *coord); gdouble (* nearest_point_get) (const GimpStroke *stroke, const GimpCoords *coord, const gdouble precision, GimpCoords *ret_point, GimpAnchor **ret_segment_start, GimpAnchor **ret_segment_end, gdouble *ret_pos); gdouble (* nearest_tangent_get) (const GimpStroke *stroke, const GimpCoords *coord1, const GimpCoords *coord2, const gdouble precision, GimpCoords *nearest, GimpAnchor **ret_segment_start, GimpAnchor **ret_segment_end, gdouble *ret_pos); gdouble (* nearest_intersection_get) (const GimpStroke *stroke, const GimpCoords *coord1, const GimpCoords *direction, const gdouble precision, GimpCoords *nearest, GimpAnchor **ret_segment_start, GimpAnchor **ret_segment_end, gdouble *ret_pos); GimpAnchor * (* anchor_get_next) (const GimpStroke *stroke, const GimpAnchor *prev); void (* anchor_select) (GimpStroke *stroke, GimpAnchor *anchor, gboolean selected, gboolean exclusive); void (* anchor_move_relative) (GimpStroke *stroke, GimpAnchor *anchor, const GimpCoords *deltacoord, GimpAnchorFeatureType feature); void (* anchor_move_absolute) (GimpStroke *stroke, GimpAnchor *anchor, const GimpCoords *coord, GimpAnchorFeatureType feature); void (* anchor_convert) (GimpStroke *stroke, GimpAnchor *anchor, GimpAnchorFeatureType feature); void (* anchor_delete) (GimpStroke *stroke, GimpAnchor *anchor); gboolean (* point_is_movable) (GimpStroke *stroke, GimpAnchor *predec, gdouble position); void (* point_move_relative) (GimpStroke *stroke, GimpAnchor *predec, gdouble position, const GimpCoords *deltacoord, GimpAnchorFeatureType feature); void (* point_move_absolute) (GimpStroke *stroke, GimpAnchor *predec, gdouble position, const GimpCoords *coord, GimpAnchorFeatureType feature); void (* close) (GimpStroke *stroke); GimpStroke * (* open) (GimpStroke *stroke, GimpAnchor *end_anchor); gboolean (* anchor_is_insertable) (GimpStroke *stroke, GimpAnchor *predec, gdouble position); GimpAnchor * (* anchor_insert) (GimpStroke *stroke, GimpAnchor *predec, gdouble position); gboolean (* is_extendable) (GimpStroke *stroke, GimpAnchor *neighbor); GimpAnchor * (* extend) (GimpStroke *stroke, const GimpCoords *coords, GimpAnchor *neighbor, GimpVectorExtendMode extend_mode); gboolean (* connect_stroke) (GimpStroke *stroke, GimpAnchor *anchor, GimpStroke *extension, GimpAnchor *neighbor); gboolean (* is_empty) (const GimpStroke *stroke); gdouble (* get_length) (const GimpStroke *stroke, const gdouble precision); gdouble (* get_distance) (const GimpStroke *stroke, const GimpCoords *coord); gboolean (* get_point_at_dist) (const GimpStroke *stroke, const gdouble dist, const gdouble precision, GimpCoords *position, gdouble *slope); GArray * (* interpolate) (const GimpStroke *stroke, const gdouble precision, gboolean *ret_closed); GimpStroke * (* duplicate) (const GimpStroke *stroke); GimpBezierDesc * (* make_bezier) (const GimpStroke *stroke); void (* translate) (GimpStroke *stroke, gdouble offset_x, gdouble offset_y); void (* scale) (GimpStroke *stroke, gdouble scale_x, gdouble scale_y); void (* rotate) (GimpStroke *stroke, gdouble center_x, gdouble center_y, gdouble angle); void (* flip) (GimpStroke *stroke, GimpOrientationType flip_type, gdouble axis); void (* flip_free) (GimpStroke *stroke, gdouble x1, gdouble y1, gdouble x2, gdouble y2); void (* transform) (GimpStroke *stroke, const GimpMatrix3 *matrix); GList * (* get_draw_anchors) (const GimpStroke *stroke); GList * (* get_draw_controls) (const GimpStroke *stroke); GArray * (* get_draw_lines) (const GimpStroke *stroke); GArray * (* control_points_get) (const GimpStroke *stroke, gboolean *ret_closed); }; GType gimp_stroke_get_type (void) G_GNUC_CONST; void gimp_stroke_set_ID (GimpStroke *stroke, gint id); gint gimp_stroke_get_ID (const GimpStroke *stroke); /* accessing / modifying the anchors */ GArray * gimp_stroke_control_points_get (const GimpStroke *stroke, gboolean *closed); GimpAnchor * gimp_stroke_anchor_get (const GimpStroke *stroke, const GimpCoords *coord); gdouble gimp_stroke_nearest_point_get (const GimpStroke *stroke, const GimpCoords *coord, const gdouble precision, GimpCoords *ret_point, GimpAnchor **ret_segment_start, GimpAnchor **ret_segment_end, gdouble *ret_pos); gdouble gimp_stroke_nearest_tangent_get (const GimpStroke *stroke, const GimpCoords *coords1, const GimpCoords *coords2, gdouble precision, GimpCoords *nearest, GimpAnchor **ret_segment_start, GimpAnchor **ret_segment_end, gdouble *ret_pos); gdouble gimp_stroke_nearest_intersection_get (const GimpStroke *stroke, const GimpCoords *coords1, const GimpCoords *direction, gdouble precision, GimpCoords *nearest, GimpAnchor **ret_segment_start, GimpAnchor **ret_segment_end, gdouble *ret_pos); /* prev == NULL: "first" anchor */ GimpAnchor * gimp_stroke_anchor_get_next (const GimpStroke *stroke, const GimpAnchor *prev); void gimp_stroke_anchor_select (GimpStroke *stroke, GimpAnchor *anchor, gboolean selected, gboolean exclusive); /* type will be an xorable enum: * VECTORS_NONE, VECTORS_FIX_ANGLE, VECTORS_FIX_RATIO, VECTORS_RESTRICT_ANGLE * or so. */ void gimp_stroke_anchor_move_relative (GimpStroke *stroke, GimpAnchor *anchor, const GimpCoords *delta, GimpAnchorFeatureType feature); void gimp_stroke_anchor_move_absolute (GimpStroke *stroke, GimpAnchor *anchor, const GimpCoords *coord, GimpAnchorFeatureType feature); gboolean gimp_stroke_point_is_movable (GimpStroke *stroke, GimpAnchor *predec, gdouble position); void gimp_stroke_point_move_relative (GimpStroke *stroke, GimpAnchor *predec, gdouble position, const GimpCoords *deltacoord, GimpAnchorFeatureType feature); void gimp_stroke_point_move_absolute (GimpStroke *stroke, GimpAnchor *predec, gdouble position, const GimpCoords *coord, GimpAnchorFeatureType feature); void gimp_stroke_close (GimpStroke *stroke); void gimp_stroke_anchor_convert (GimpStroke *stroke, GimpAnchor *anchor, GimpAnchorFeatureType feature); void gimp_stroke_anchor_delete (GimpStroke *stroke, GimpAnchor *anchor); GimpStroke * gimp_stroke_open (GimpStroke *stroke, GimpAnchor *end_anchor); gboolean gimp_stroke_anchor_is_insertable (GimpStroke *stroke, GimpAnchor *predec, gdouble position); GimpAnchor * gimp_stroke_anchor_insert (GimpStroke *stroke, GimpAnchor *predec, gdouble position); gboolean gimp_stroke_is_extendable (GimpStroke *stroke, GimpAnchor *neighbor); GimpAnchor * gimp_stroke_extend (GimpStroke *stroke, const GimpCoords *coords, GimpAnchor *neighbor, GimpVectorExtendMode extend_mode); gboolean gimp_stroke_connect_stroke (GimpStroke *stroke, GimpAnchor *anchor, GimpStroke *extension, GimpAnchor *neighbor); gboolean gimp_stroke_is_empty (const GimpStroke *stroke); /* accessing the shape of the curve */ gdouble gimp_stroke_get_length (const GimpStroke *stroke, const gdouble precision); gdouble gimp_stroke_get_distance (const GimpStroke *stroke, const GimpCoords *coord); gboolean gimp_stroke_get_point_at_dist (const GimpStroke *stroke, const gdouble dist, const gdouble precision, GimpCoords *position, gdouble *slope); /* returns an array of valid coordinates */ GArray * gimp_stroke_interpolate (const GimpStroke *stroke, const gdouble precision, gboolean *closed); GimpStroke * gimp_stroke_duplicate (const GimpStroke *stroke); /* creates a bezier approximation. */ GimpBezierDesc * gimp_stroke_make_bezier (const GimpStroke *stroke); void gimp_stroke_translate (GimpStroke *stroke, gdouble offset_x, gdouble offset_y); void gimp_stroke_scale (GimpStroke *stroke, gdouble scale_x, gdouble scale_y); void gimp_stroke_rotate (GimpStroke *stroke, gdouble center_x, gdouble center_y, gdouble angle); void gimp_stroke_flip (GimpStroke *stroke, GimpOrientationType flip_type, gdouble axis); void gimp_stroke_flip_free (GimpStroke *stroke, gdouble x1, gdouble y1, gdouble x2, gdouble y2); void gimp_stroke_transform (GimpStroke *stroke, const GimpMatrix3 *matrix); GList * gimp_stroke_get_draw_anchors (const GimpStroke *stroke); GList * gimp_stroke_get_draw_controls (const GimpStroke *stroke); GArray * gimp_stroke_get_draw_lines (const GimpStroke *stroke); #endif /* __GIMP_STROKE_H__ */