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# image-char.h: information about the characters in the image.
#
# Copyright (C) 1992, 2011 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 of the License, 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 <http://www.gnu.org/licenses/>.
#
*/
#ifndef IMAGE_CHAR_H
#define IMAGE_CHAR_H
#include "types.h"
/* A single character in the image. */
typedef struct
{
charcode_type charcode;
string charname;
boolean omit;
int baseline_adjust;
unsigned bb_count;
boolean alternating;
int lsb, rsb;
} image_char_type;
/* The character code. This is garbage if `omit' is true. */
#define IMAGE_CHARCODE(c) ((c).charcode)
/* The character name. */
#define IMAGE_CHARNAME(c) ((c).charname)
/* Says whether this character should be output. */
#define IMAGE_CHAR_OMIT(c) ((c).omit)
/* How far the baseline should be moved from the row's baseline. */
#define IMAGE_CHAR_BASELINE_ADJUST(c) ((c).baseline_adjust)
/* How many bounding boxes comprise this character. */
#define IMAGE_CHAR_BB_COUNT(c) ((c).bb_count)
/* Says whether the bounding boxes in this character are consecutive
(the usual case) or alternate. */
#define IMAGE_CHAR_BB_ALTERNATING(c) ((c).alternating)
/* The side bearings. */
#define IMAGE_CHAR_LSB(c) ((c).lsb)
#define IMAGE_CHAR_RSB(c) ((c).rsb)
/* A list of the above. */
typedef struct
{
image_char_type *data;
unsigned length;
} image_char_list_type;
/* The Nth element of the list L. */
#define IMAGE_CHAR(l, n) ((l).data[n])
/* The list as a whole. */
#define IMAGE_CHAR_LIST_DATA(l) ((l).data)
/* The length of the list. */
#define IMAGE_CHAR_LIST_LENGTH(l) ((l).length)
/* Return an empty list. */
extern image_char_list_type new_image_char_list (void);
/* Append the character C to the list L. */
extern void append_image_char (image_char_list_type *l, image_char_type c);
/* Return false if the box BOX_COUNT boxes beyond FIRST_CHAR in LIST
is in the middle of a character, true otherwise. */
extern boolean box_at_char_boundary_p
(image_char_list_type list, unsigned first_char, unsigned box_count);
#endif /* not IMAGE_CHAR_H */
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