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- /* 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 2, 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, write to the Free Software
- Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
-
- #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 asymetrically. */
- #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 const bounding_box_type dimensions_to_bb (dimensions_type);
- extern const 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 */
-