64 lines
2.1 KiB
C
64 lines
2.1 KiB
C
/* 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 */
|
