usr/src/local/ditroff/ditroff.okeeffe/dev.h

/*
        dev.h: characteristics of a typesetter
*/

struct dev {
        unsigned short  filesize;       /* number of bytes in file, */
                                /* excluding dev part */
        short   res;            /* basic resolution in goobies/inch */
        short   hor;            /* goobies horizontally */
        short   vert;
        short   unitwidth;      /* size at which widths are given, in effect */
        short   nfonts;         /* number of fonts physically available */
        short   nsizes;         /* number of sizes it has */
        short   sizescale;      /* scaling for fractional point sizes */
        short   paperwidth;     /* max line length in units */
        short   paperlength;    /* max paper length in units */
        short   nchtab;         /* number of funny names in chtab */
        short   lchname;        /* length of chname table */
        short   spare1;         /* #chars in largest ever font */
        short   spare2;         /* in case of expansion */
};

struct Font {           /* characteristics of a font */
        char    nwfont;         /* number of width entries for this font */
        char    specfont;       /* 1 == special font */
        char    ligfont;        /* 1 == ligatures exist on this font */
        char    spare1;         /* unused for now */
        char    fonttab;        /* 1 == use extra table for fontnumbers */
        char    slant;          /* if set, slant font by slant degrees */
        char    namefont[10];   /* name of this font (e.g., "R" */
        char    intname[10];    /* internal name (=number) on device, in ascii */
};

/* ligatures, ORed into ligfont */

#define LFF     01
#define LFI     02
#define LFL     04
#define LFFI    010
#define LFFL    020

/*
 * Notes by jaap:
 *
 * spare1 int struct dev is also known as biggestfont
 *
 * in Font struvture is added:
 *      fonttab: if set to 1, the Font.out has an extra
 *                table of shorts which gives the physical font
 *                on which the chracter lives. Allows mapping of
 *                "logial fonts" into variuos physical fonts on the
 *                device. Needed since the Harris f.i. has a weird font
 *                lay-out. Also makes fonts consisting of weird
 *                character combinations easier.
 *      slant:  The font can must be slanted to force italics (function
 *              of back-end, necessary for f.i. the Harris, which
 *              doesn't has italics for the sans-serif fonts; these
 *              italics have to be made by slanting)
 */