1 /* GIMP - The GNU Image Manipulation Program 2 * Copyright (C) 1995 Spencer Kimball and Peter Mattis 3 * 4 * This program is free software: you can redistribute it and/or modify 5 * it under the terms of the GNU General Public License as published by 6 * the Free Software Foundation; either version 3 of the License, or 7 * (at your option) any later version. 8 * 9 * This program is distributed in the hope that it will be useful, 10 * but WITHOUT ANY WARRANTY; without even the implied warranty of 11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 12 * GNU General Public License for more details. 13 * 14 * You should have received a copy of the GNU General Public License 15 * along with this program. If not, see <https://www.gnu.org/licenses/>. 16 */ 17 18 #ifndef __GIMP_BOUNDARY_H__ 19 #define __GIMP_BOUNDARY_H__ 20 21 22 /* half intensity for mask */ 23 #define GIMP_BOUNDARY_HALF_WAY 0.5 24 25 26 typedef enum 27 { 28 GIMP_BOUNDARY_WITHIN_BOUNDS, 29 GIMP_BOUNDARY_IGNORE_BOUNDS 30 } GimpBoundaryType; 31 32 33 struct _GimpBoundSeg 34 { 35 gint x1; 36 gint y1; 37 gint x2; 38 gint y2; 39 guint open : 1; 40 guint visited : 1; 41 }; 42 43 44 GimpBoundSeg * gimp_boundary_find (GeglBuffer *buffer, 45 const GeglRectangle *region, 46 const Babl *format, 47 GimpBoundaryType type, 48 gint x1, 49 gint y1, 50 gint x2, 51 gint y2, 52 gfloat threshold, 53 gint *num_segs); 54 GimpBoundSeg * gimp_boundary_sort (const GimpBoundSeg *segs, 55 gint num_segs, 56 gint *num_groups); 57 GimpBoundSeg * gimp_boundary_simplify (GimpBoundSeg *sorted_segs, 58 gint num_groups, 59 gint *num_segs); 60 61 /* offsets in-place */ 62 void gimp_boundary_offset (GimpBoundSeg *segs, 63 gint num_segs, 64 gint off_x, 65 gint off_y); 66 67 68 #endif /* __GIMP_BOUNDARY_H__ */ 69