2.11BSD#431 - /usr/man/cat5/vfont.0

VFONT(5)	    UNIX Programmer's Manual		 VFONT(5)


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

SYNOPSIS
     /usr/share/vfont/*

DESCRIPTION
     The fonts for the printer/plotters have the following for-
     mat.  Each file contains a header, an array of 256 character
     description structures, and then the bit maps for the char-
     acters 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 ele-
     ment 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/share/vfont/*


Printed 11/26/99	October 22, 1996			1


VFONT(5)	    UNIX Programmer's Manual		 VFONT(5)


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


Printed 11/26/99	October 22, 1996			2