diff options
Diffstat (limited to '')
-rw-r--r-- | plug-ins/selection-to-path/bounding-box.h | 63 |
1 files changed, 63 insertions, 0 deletions
diff --git a/plug-ins/selection-to-path/bounding-box.h b/plug-ins/selection-to-path/bounding-box.h new file mode 100644 index 0000000..54f1e71 --- /dev/null +++ b/plug-ins/selection-to-path/bounding-box.h @@ -0,0 +1,63 @@ +/* bounding-box.h: operations on both real- and integer-valued bounding boxes. + * + * Copyright (C) 1992 Free Software Foundation, Inc. + * + * 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, 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 <https://www.gnu.org/licenses/>. + */ + +#ifndef BOUNDING_BOX_H +#define BOUNDING_BOX_H + +#include "types.h" + + +/* The bounding box's numbers are usually in Cartesian/Metafont + coordinates: (0,0) is towards the lower left. */ +typedef struct +{ + signed_4_bytes min_row, max_row; + signed_4_bytes min_col, max_col; +} bounding_box_type; + +typedef struct +{ + real min_row, max_row; + real min_col, max_col; +} real_bounding_box_type; + +/* These accessing macros work for both types of bounding boxes, since + the member names are the same. */ +#define MIN_ROW(bb) ((bb).min_row) +#define MAX_ROW(bb) ((bb).max_row) +#define MIN_COL(bb) ((bb).min_col) +#define MAX_COL(bb) ((bb).max_col) + +/* See the comments at `get_character_bitmap' in gf_input.c for why the + width and height are treated asymmetrically. */ +#define BB_WIDTH(bb) (MAX_COL (bb) - MIN_COL (bb)) +#define BB_HEIGHT(bb) (MAX_ROW (bb) - MIN_ROW (bb) + 1) + + +/* Convert a dimensions structure to an integer bounding box, and vice + versa. */ +extern bounding_box_type dimensions_to_bb (dimensions_type); +extern dimensions_type bb_to_dimensions (bounding_box_type); + + +/* Update the bounding box BB from the point P. */ +extern void update_real_bounding_box (real_bounding_box_type *bb, + real_coordinate_type p); +extern void update_bounding_box (bounding_box_type *bb, coordinate_type p); + +#endif /* not BOUNDING_BOX_H */ |