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.TH GRODVI @MAN1EXT@ "@MDATE@" "Groff Version @VERSION@"
.SH NAME
grodvi \- convert groff output to TeX dvi format
.
.
.SH SYNOPSIS
.B grodvi
[
.B \-dlv
] [
.BI \-F dir
] [
.BI \-p papersize
] [
.BI \-w n
] [
.IR files \|.\|.\|.\&
]
.PP
It is possible to have whitespace between a command line option and its
parameter.
.
.
.SH DESCRIPTION
.B grodvi
is a driver for
.B groff
that produces \*(tx dvi format.
.
Normally it should be run by
.BR groff\ \-Tdvi .
.
This will run
.BR @g@troff\ \-Tdvi ;
it will also input the macros in
.BR @MACRODIR@/dvi.tmac .
.
.LP
The dvi file generated by
.B 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
.B \[rs]D
commands will not produce any output.
.
.LP
There is an additional drawing command available:
.
.TP
.BI \[rs]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
.RI +( 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
.B \[rs]D
commands.
.
.LP
The groff command
.BI \[rs]X' anything '
is translated into the same command in the dvi file as would be
produced by
.BI \[rs]special{ anything }
in \*(tx;
.I anything
may not contain a newline.
.
.LP
For inclusion of EPS image files,
.B \-Tdvi
loads
.B pspic.tmac
automatically, providing the
.B PSPIC
macro.
.
Please check
.BR groff_tmac (@MAN5EXT@)
for a detailed description.
.
.LP
Font files for
.B grodvi
can be created from tfm files using
.BR tfmtodit (@MAN1EXT@).
.
The font description file should contain the following
additional commands:
.
.Tp \w'\fBinternalname'u+2n
.BI internalname\ name
The name of the tfm file (without the
.B .tfm
extension) is
.IR name .
.
.TP
.BI checksum\ n
The checksum in the tfm file is
.IR n .
.
.TP
.BI designsize\ n
The designsize in the tfm file is
.IR n .
.
.LP
These are automatically generated by
.B tfmtodit.
.
.LP
The default color for
.B \[rs]m
and
.B \[rs]M
is black.
.
Currently, the drawing color for
.B \[rs]D
commands is always black, and fill color values are translated to gray.
.
.LP
In
.B troff
the
.B \[rs]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.
.
.LP
By design, the DVI format doesn't care about physical dimensions of the
output medium.
.
Instead,
.B grodvi
emits the equivalent to \*(tx's
.BI \[rs]special{papersize= width , length }
on the first page;
.B dvips
(and possibly other DVI drivers) then sets the page size accordingly.
.
If either the page width or length is not positive, no papersize special
is output.
.
.
.SH OPTIONS
.TP
.B \-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.
.
.TP
.BI \-F dir
Prepend directory
.IB dir /dev name
to the search path for font and device description files;
.I name
is the name of the device, usually
.BR dvi .
.
.TP
.B \-l
Specify landscape orientation.
.
.TP
.BI \-p papersize
Specify paper dimensions.
.
This overrides the
.BR papersize ,
.BR paperlength ,
and
.B paperwidth
commands in the
.B DESC
file; it accepts the same arguments as the
.B papersize
command (see
.BR groff_font (@MAN5EXT@)
for details).
.
.TP
.B \-v
Print the version number.
.
.TP
.BI \-w n
Set the default line thickness to
.I n
thousandths of an em.
If this option isn't specified, the line thickness defaults to 0.04\~em.
.
.
.SH USAGE
There are styles called
.BR R ,
.BR I ,
.BR B ,
and
.B BI
mounted at font positions 1 to\ 4.
The fonts are grouped into families
.B T
and
.B H\ \c
having members in each of these styles:
.
.RS
.TP
.B TR
.FT TR
CM Roman (cmr10)
.FT
.
.TQ
.B TI
.FT TI
CM Text Italic (cmti10)
.FT
.
.TQ
.B TB
.FT TB
CM Bold Extended Roman (cmbx10)
.FT
.
.TQ
.B TBI
.FT TBI
CM Bold Extended Text Italic (cmbxti10)
.FT
.
.TQ
.B HR
.FT HR
CM Sans Serif (cmss10)
.FT
.
.TQ
.B HI
.FT HI
CM Slanted Sans Serif (cmssi10)
.FT
.
.TQ
.B HB
.FT HB
CM Sans Serif Bold Extended (cmssbx10)
.FT
.
.TQ
.B HBI
.FT HBI
CM Slanted Sans Serif Bold Extended (cmssbxo10)
.FT
.RE
.
.LP
There are also the following fonts which are not members of a family:
.
.RS
.TP
.B CW
CM Typewriter Text (cmtt10)
.FT CW
.FT
.
.TQ
.B CWI
CM Italic Typewriter Text (cmitt10)
.FT CWI
.FT
.RE
.
.LP
Special fonts are
.B MI
(cmmi10),
.B S
(cmsy10),
.B EX
(cmex10),
.B SC
(cmtex10, only for
.BR CW ),
and, perhaps surprisingly,
.BR TR ,
.BR TI ,
and
.BR CW ,
due to the different font encodings of text fonts.
.
For italic fonts,
.B CWI
is used instead of
.BR CW .
.
.LP
Finally, the symbol fonts of the American Mathematical Society are available
as special fonts
.B SA
(msam10) and
.B SB
(msbm10).
.
These two fonts are not mounted by default.
.
.LP
Using the option
.B \-mec
(which loads the file
.BR ec.tmac )
provides the EC and TC fonts.
.
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
.B ec.tmac
must be called before any language-specific files; it doesn't take care of
hcode values.
.
.
.SH FILES
.TP
.B @FONTDIR@/devdvi/DESC
Device description file.
.
.TP
.BI @FONTDIR@/devdvi/ F
Font description file for font
.IR F .
.
.TP
.B @MACRODIR@/dvi.tmac
Macros for use with
.BR grodvi .
.
.TP
.B @MACRODIR@/ec.tmac
Macros to switch to EC fonts.
.
.
.SH BUGS
Dvi files produced by
.B grodvi
use a different resolution (57816 units per inch) to those produced by
\*(tx.
.
Incorrectly written drivers which assume the resolution used by \*(tx,
rather than using the resolution specified in the dvi file will not
work with
.BR grodvi .
.
.LP
When using the
.B \-d
option with boxed tables,
vertical and horizontal lines can sometimes protrude by one pixel.
.
This is a consequence of the way \*(tx requires that the heights
and widths of rules be rounded.
.
.
.SH "SEE ALSO"
.BR tfmtodit (@MAN1EXT@),
.BR groff (@MAN1EXT@),
.BR @g@troff (@MAN1EXT@),
.BR groff_out (@MAN5EXT@),
.BR groff_font (@MAN5EXT@),
.BR groff_char (@MAN7EXT@),
.BR groff_tmac (@MAN5EXT@)
.
.cp \n[grodvi_C]
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