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  struc‐
       tures, 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 _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 struc‐
       tures 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 _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.

FILES
       /usr/lib/vfont/∗

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



7th Edition                      May 13, 1986                         VFONT(5)