vfont man page on NeXTSTEP

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VFONT(5)							      VFONT(5)

NAME
       vfont - font formats for the Benson-Varian or Versatec

SYNOPSIS
       /usr/lib/vfont/∗

DESCRIPTION
       The  fonts  for	the  printer/plotters have the following format.  Each
       file  contains  a  header,  an  array  of  256  character   description
       structures,  and	 then the bit maps for the characters themselves.  The
       header has the following format:

	    struct header {
		    short	    magic;
		    unsigned short  size;
		    short	    maxx;
		    short	    maxy;
		    short	    xtnd;
	    } header;

       The magic number is 0436 (octal).  The maxx, maxy, and xtnd fields  are
       not  used  at  the  current time.  Maxx and maxy are intended to be the
       maximum horizontal and vertical size of	any  glyph  in	the  font,  in
       raster  lines.  The size is the size of the bit maps for the characters
       in bytes.  Before the maps for  the  characters	is  an	array  of  256
       structures  for	each  of  the  possible	 characters in the font.  Each
       element of the array has the form:

	    struct dispatch {
		    unsigned short  addr;
		    short	    nbytes;
		    char	    up;
		    char	    down;
		    char	    left;
		    char	    right;
		    short	    width;
	    };

       The nbytes field is nonzero for characters which actually  exist.   For
       such  characters, the addr field is an offset into the rest of the file
       where the data for that character begins.  There are  up+down  rows  of
       data  for each character, each of which has left+right bits, rounded up
       to a number of bytes.  The width field is not used by vcat, although it
       is  to make width tables for troff.  It represents the logical width of
       the glyph, in raster lines, and shows where the base point of the  next
       glyph would be.

FILES
       /usr/lib/vfont/∗

SEE ALSO
       troff(1), pti(1), vfontinfo(1)

7th Edition			 May 13, 1986			      VFONT(5)
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