ref: 333bf8409e656a9676c60d94de7aaa0f0af1e58e
dir: /xroff.h/
#define SC_IN (dev_res)
#define SC_PT (SC_IN / 72)
#define FNLEN 32
#define FNGLYPHS 512
#define FNNAME 32
#define LLEN 128
/* number registers */
extern int nreg[];
int num_get(int id);
int num_set(int id, int n);
int tr_int(char *s, int orig, int unit);
/* builtin number registers; n_X for .X register */
#define N_ID(c1, c2) ((c1) * 256 + (c2))
#define n_f nreg[N_ID('.', 'f')]
#define n_s nreg[N_ID('.', 's')]
#define n_o nreg[N_ID('.', 'o')]
#define n_p nreg[N_ID('.', 'p')]
#define n_l nreg[N_ID('.', 'l')]
#define n_v nreg[N_ID('.', 'v')]
#define n_i nreg[N_ID('.', 'i')]
/* device related variables */
extern int dev_res;
extern int dev_uwid;
extern int dev_hor;
extern int dev_ver;
struct glyph {
char name[FNNAME]; /* name of the glyph */
char id[FNNAME]; /* device-dependent glyph identifier */
struct font *font; /* glyph font */
int wid; /* character width */
int type; /* character type; ascender/descender */
};
struct font {
char name[FNLEN];
struct glyph glyphs[FNGLYPHS];
int nglyphs;
int spacewid;
int special;
char c[FNGLYPHS][FNNAME]; /* character names in charset */
struct glyph *g[FNGLYPHS]; /* character glyphs in charset */
int n; /* number of characters in charset */
};
/* output device functions */
int dev_open(char *path);
void dev_close(void);
int dev_mnt(int pos, char *id, char *name);
int dev_font(char *id);
/* font-related functions */
struct font *font_open(char *path);
void font_close(struct font *fn);
struct glyph *font_glyph(struct font *fn, char *id);
struct glyph *font_find(struct font *fn, char *name);
/* glyph handling functions */
struct glyph *dev_glyph(char *c, int fn);
struct glyph *dev_glyph_byid(char *id, int fn);
int dev_spacewid(void);
/* different layers of neatroff */
int in_next(void);
int cp_next(void);
int tr_next(void);
void in_push(char *s);
void in_back(int c);
void cp_back(int c);
/* rendering */
void render(void);
/* error messages */
void errmsg(char *msg);
/* troff commands */
void tr_br(int argc, char **args);
void tr_sp(int argc, char **args);
void tr_nr(int argc, char **args);
void tr_ps(int argc, char **args);
void tr_ft(int argc, char **args);