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/* char.h: the definition of `char_type'.
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, 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 CHAR_H
#define CHAR_H
#include "font.h"
#include "list.h"
#include "realstrval.h"
/* We want these to mean the values in our own structure. */
#undef CHAR_LSB
#undef CHAR_RSB
/* A side bearing can be defined almost like a symbol (no `char_type'). */
typedef struct
{
symval_tag_type tag;
real_string_val_type value;
} sidebearing_type;
#define SB_TAG(sb) ((sb).tag)
#define SB_VALUE(sb) ((sb).value)
#define SB_REAL(sb) ((sb).value.real_val)
#define SB_STRING(sb) ((sb).value.string_val)
/* The information about each character in which we're interested. */
typedef struct
{
char_info_type *char_info;
tfm_char_type *tfm_info;
sidebearing_type *lsb, *rsb;
list_type kerns; /* We use `char_kern_type' for the elements. */
} char_type;
/* The information from the bitmap font. */
#define CHAR_BITMAP_INFO(c) ((c).char_info)
#define CHAR_CHARCODE(c) CHARCODE (*CHAR_BITMAP_INFO (c))
/* The information from the TFM file. */
#define CHAR_TFM_INFO(c) ((c).tfm_info)
/* Information we've collected for the sidebearings. */
#define CHAR_LSB(c) ((c).lsb)
#define CHAR_LSB_TAG(c) (CHAR_LSB (c)->tag)
#define CHAR_LSB_VALUE(c) (CHAR_LSB (c)->value)
#define CHAR_RSB(c) ((c).rsb)
#define CHAR_RSB_TAG(c) (CHAR_RSB (c)->tag)
#define CHAR_RSB_VALUE(c) (CHAR_RSB (c)->value)
#define CHAR_KERNS(c) ((c).kerns)
/* Initialize the various fields. */
extern char_type init_char (void);
/* Get the font information for CODE, and update *C_PTR_ADDR from the
symbol table and encoding vector. */
extern void do_char (charcode_type code, char_type **c_ptr_addr);
/* Looks up `designsize' in the symbol table and converts the result
back to printer's points. */
extern real get_designsize_in_points (void);
#endif /* not CHAR_H */
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