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.\" $Id: eqn2graph.man,v 1.2 2002/08/21 17:29:17 wlemb Exp $
.\" This documentation is released to the public domain.
.
.
.\" Like TP, but if specified indent is more than half
.\" the current line-length - indent, use the default indent.
.de Tp
.ie \\n(.$=0:((0\\$1)*2u>(\\n(.lu-\\n(.iu)) .TP
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.TH EQN2GRAPH @MAN1EXT@ "@MDATE@" "Groff Version @VERSION@"
.IX eqn2graph
.SH NAME
eqn2graph \- convert an EQN equation into a cropped image
.
.
.SH SYNOPSIS
.B eqn2graph
[
.B \-unsafe
]
[
.BI \-format\ fmt
]
.
.
.SH DESCRIPTION
Reads an EQN equation (one line) as input; produces an image
file (by default in Portable Network Graphics format) suitable for the
Web as output.
.P
Your input EQN code should \fInot\fR have the .EQ/.EN preamble that
that normally precedes it within
.BR groff (@MAN1EXT@)
macros; nor do you need to have dollar-sign or other delimiters
around the equation.
.P
The output image will be a black-on-white graphic clipped to the
smallest possible bounding box that contains all the black pixels.
By specifying command-line options to be passed to
.BR convert (1)
you can give it a border, set the background transparent, set the
image's pixel density, or perform other useful transformations.
.P
This program uses
.BR @g@eqn (@MAN1EXT@),
.BR groff (@MAN1EXT@),
and the ImageMagick
.BR convert (1)
program.
These programs must be installed on your system and accessible on your
$PATH for \fBeqn2graph\fR to work.
.
.
.SH OPTIONS
.TP
.B \-unsafe
Run
.BR groff (@MAN1EXT@)
in the `unsafe' mode enabling the PIC macro
.B sh
to execute arbitrary commands.
The default is to forbid this.
.TP
.BI \-format\ fmt
Specify an output format; the default is PNG (Portable Network Graphics).
Any format that
.BR convert (1)
can emit is supported.
.PP
Command-line switches and arguments not listed above are passed to
.BR convert (1).
.
.
.SH FILES
.Tp \w'\fB@MACRODIR@/eqnrc'u+2n
.B @MACRODIR@/eqnrc
The
.BR @g@eqn (@MAN1EXT@)
initialization file.
.
.
.SH "SEE ALSO"
.BR @g@eqn (@MAN1EXT@),
.BR groff (@MAN1EXT@),
.BR gs (1),
.BR convert (1).
.
.
.SH AUTHOR
Eric S. Raymond <esr@thyrsus.com>.
.
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