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authorJacob McDonnell <jacob@jacobmcdonnell.com>2026-04-26 16:38:00 -0400
committerJacob McDonnell <jacob@jacobmcdonnell.com>2026-04-26 16:38:00 -0400
commit97d5c458cfa039d857301e1ca7d5af3beb37131d (patch)
treeb460cd850d0537eb71806ba30358840377b27688 /static/v10/man5/vfont.5
parentb89dc2331a50c63f8b33272a5c4c61ab98abdaa3 (diff)
build: Better Build System
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-.TH VFONT 5 2/26/79 5
-.UC
-.SH NAME
-vfont \- font formats for the Benson-Varian or Versatec
-.SH SYNOPSIS
-.B /usr/lib/vfont/\(**
-.SH 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:
-.in +5
-.nf
-.sp
-.ta 8n +\w'unsigned short 'u
-struct header {
- short magic;
- unsigned short size;
- short maxx;
- short maxy;
- short xtnd;
-} header;
-.fi
-.in -5
-.PP
-The
-.I magic
-number is 0436 (octal).
-The
-.I maxx,
-.I maxy,
-and
-.I xtnd
-fields are not used at the current time.
-.I Maxx
-and
-.I maxy
-are intended to be the maximum horizontal and vertical size of
-any glyph in the font, in raster lines.
-The
-.I 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:
-.in +5
-.nf
-.sp
-.ta 8n +\w'unsigned short 'u
-struct dispatch {
- unsigned short addr;
- short nbytes;
- char up;
- char down;
- char left;
- char right;
- short width;
-};
-.fi
-.in -5
-.PP
-The
-.I nbytes
-field is nonzero for characters which actually exist.
-For such characters, the
-.I addr
-field is an offset into the rest of the file where the data for
-that character begins.
-There are
-.I up+down
-rows of data for each character,
-each of which has
-.I left+right
-bits, rounded up to a number of bytes.
-The
-.I width
-field is not used by vcat,
-although it is used by
-.IR vwidth (1)
-to make width tables for
-.IR troff .
-It represents the logical width of the glyph, in raster lines,
-and shows where the base point of the next glyph would be.
-.SH FILES
-/usr/lib/vfont/\(**
-.SH SEE ALSO
-troff(1), pti(1), vpr(1), vtroff(1), vwidth(1), vfontinfo(1), fed(1)