4.3BSD-Tahoe/usr/man/cat5/vfont.0

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



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

SSYYNNOOPPSSIISS
     //uussrr//lliibb//vvffoonntt//**

DDEESSCCRRIIPPTTIIOONN
     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 _m_a_g_i_c number is 0436 (octal).	The _m_a_x_x, _m_a_x_y, and _x_t_n_d
     fields are not used at the current time.  _M_a_x_x and _m_a_x_y are
     intended to be the maximum horizontal and vertical size of
     any glyph in the font, in raster lines.  The _s_i_z_e 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 _n_b_y_t_e_s field is nonzero for characters which actually
     exist.  For such characters, the _a_d_d_r field is an offset
     into the rest of the file where the data for that character
     begins.  There are _u_p+_d_o_w_n rows of data for each character,
     each of which has _l_e_f_t+_r_i_g_h_t bits, rounded up to a number of
     bytes.  The _w_i_d_t_h field is not used by vcat, although it is
     to make width tables for _t_r_o_f_f.  It represents the logical
     width of the glyph, in raster lines, and shows where the
     base point of the next glyph would be.

FFIILLEESS
     /usr/lib/vfont/*




Printed 7/9/88		  May 13, 1986				1






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



SSEEEE AALLSSOO
     troff(1), pti(1), vfontinfo(1)





















































Printed 7/9/88		  May 13, 1986				2