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- /* bounding-box.c: definitions for bounding box operations.
-
- 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. */
-
- #include "config.h"
-
- #include "bounding-box.h"
-
-
- /* See the comments at `get_character_bitmap' in gf_input.c for why the
- width and height are treated asymmetrically. */
-
- const bounding_box_type
- dimensions_to_bb (dimensions_type dimensions)
- {
- bounding_box_type answer;
-
- MIN_ROW (answer) = 0;
- MIN_COL (answer) = 0;
- MAX_ROW (answer) = MAX ((int) DIMENSIONS_HEIGHT (dimensions) - 1, 0);
- MAX_COL (answer) = MAX (DIMENSIONS_WIDTH (dimensions), 0);
-
- return answer;
- }
-
-
- /* Dimensions can't be negative, even though bounding boxes can, so we
- have to check. */
-
- const dimensions_type
- bb_to_dimensions (bounding_box_type bb)
- {
- dimensions_type d;
-
- DIMENSIONS_WIDTH (d) = MAX (BB_WIDTH (bb), 0);
- DIMENSIONS_HEIGHT (d) = MAX (BB_HEIGHT (bb), 0);
-
- return d;
- }
-
-
- /* If the point P lies outside of any of the current bounds in BB,
- update BB. */
-
- void
- update_real_bounding_box (real_bounding_box_type *bb, real_coordinate_type p)
- {
- if (p.x < MIN_COL (*bb)) MIN_COL (*bb) = p.x;
- if (p.x > MAX_COL (*bb)) MAX_COL (*bb) = p.x;
- if (p.y < MIN_ROW (*bb)) MIN_ROW (*bb) = p.y;
- if (p.y > MAX_ROW (*bb)) MAX_ROW (*bb) = p.y;
-
- }
-
-
- void
- update_bounding_box (bounding_box_type *bb, coordinate_type p)
- {
- if (p.x < MIN_COL (*bb)) MIN_COL (*bb) = p.x;
- if (p.x > MAX_COL (*bb)) MAX_COL (*bb) = p.x;
- if (p.y < MIN_ROW (*bb)) MIN_ROW (*bb) = p.y;
- if (p.y > MAX_ROW (*bb)) MAX_ROW (*bb) = p.y;
-
- }
-