OpenDarwin 7.2.1 - man page for grodvi (opendarwin section 1)

```GRODVI(1)						      General Commands Manual							 GRODVI(1)

NAME
grodvi - convert groff output to TeX dvi format

SYNOPSIS
grodvi [ -dv ] [ -wn ] [ -Fdir ] [ files... ]

It is possible to have whitespace between a command line option and its parameter.

DESCRIPTION
grodvi  is  a driver for groff that produces TeX dvi format.  Normally it should be run by groff -Tdvi.	This will run troff -Tdvi; it will
also  input  the  macros  /usr/share/groff/1.18.1/tmac/dvi.tmac;  if  the  input  is  being  preprocessed  with	eqn  it  will  also  input
/usr/share/groff/1.18.1/font/devdvi/eqnchar.

The  dvi  file  generated by grodvi can be printed by any correctly-written dvi driver.	The troff drawing primitives are implemented using
the tpic version 2 specials.  If the driver does not support these, the \D commands will not produce any output.

There is an additional drawing command available:

\D'R dh dv'
Draw a rule (solid black rectangle), with one corner at the current position, and the diagonally	opposite  corner  at  the  current
position +(dh,dv).  Afterwards the current position will be at the opposite corner.  This produces a rule in the dvi file and so can
be printed even with a driver that does not support the tpic specials unlike the other \D commands.

The groff command \X'anything' is translated into the same command in the dvi file as would be produced by \special{anything} in TeX;  any-
thing may not contain a newline.

For  inclusion of EPS image files, grodvi loads pspic.tmac automatically, providing the PSPIC macro.  Please check grops (1) for a detailed
description of this macro.

Font files for grodvi can be created from tfm files using tfmtodit(1).  The font description file should contain the  following	additional
commands:

internalname name
The name of the tfm file (without the .tfm extension) is name.

checksum n    The checksum in the tfm file is n.

designsize n  The designsize in the tfm file is n.

These are automatically generated by tfmtodit.

The  default  color for \m and \M is black.  Currently, the drawing color for \D commands is always black, and fill color values are trans-
lated to gray.

In troff the \N escape sequence can be used to access characters by their position in the corresponding tfm file; all characters in the tfm
file can be accessed this way.

OPTIONS
-d     Do  not use tpic specials to implement drawing commands.	Horizontal and vertical lines will be implemented by rules.  Other drawing
commands will be ignored.

-v     Print the version number.

-wn    Set the default line thickness to n thousandths of an em.  If this option isn't specified, the line thickness defaults to 0.04 em.

-Fdir  Prepend directory dir/devname to the search path for font and device description files; name is the name of the device, usually dvi.

USAGE
There are styles called R, I, B, and BI mounted at font positions 1 to 4.  The fonts are grouped into families T and H  having  members	in
each of these styles:

TR     CM Roman (cmr10)

TI     CM Text Italic (cmti10)

TB     CM Bold Extended Roman (cmbx10)

TBI    CM Bold Extended Text Italic (cmbxti10)

HR     CM Sans Serif (cmss10)

HI     CM Slanted Sans Serif (cmssi10)

HB     CM Sans Serif Bold Extended (cmssbx10)

HBI    CM Slanted Sans Serif Bold Extended (cmssbxo10)

There are also the following fonts which are not members of a family:

CW     CM Typewriter Text (cmtt10)

CWI    CM Italic Typewriter Text (cmitt10)

Special	fonts  are MI (cmmi10), S (cmsy10), EX (cmex10), and, perhaps surprisingly, TR, TI, and CW, due to the different font encodings of
text fonts.  For italic fonts, CWI is used instead of CW.

Finally, the symbol fonts of the American Mathematical Society are available as special fonts SA (msam10) and SB (msbm10).  These two fonts
are not mounted by default.

Using  the  option -mec (loading the file ec.tmac) EC and TC fonts are used.  The design of the EC family is very similar to that of the CM
fonts; additionally, they give a much better coverage of groff symbols.	Note that ec.tmac must	be  called  before  any  language-specific
files; it doesn't take care of hcode values.

FILES
/usr/share/groff/1.18.1/font/devdvi/DESC
Device description file.

/usr/share/groff/1.18.1/font/devdvi/F
Font description file for font F.

/usr/share/groff/1.18.1/tmac/dvi.tmac
Macros for use with grodvi.

/usr/share/groff/1.18.1/tmac/ec.tmac
Macros to switch to EC fonts.

BUGS
Dvi files produced by grodvi use a different resolution (57816 units per inch) to those produced by TeX.  Incorrectly written drivers which
assume the resolution used by TeX, rather than using the resolution specified in the dvi file will not work with grodvi.

When using the -d option with boxed tables, vertical and horizontal lines can sometimes protrude by one pixel.  This is	a  consequence	of
the way TeX requires that the heights and widths of rules be rounded.