eqn2graph - convert an EQN equation into a cropped image
eqn2graph [ -unsafe ] [ -format fmt ]
EQN2GRAPH(1) General Commands Manual EQN2GRAPH(1)
NAME
eqn2graph - convert an EQN equation into a cropped image
SYNOPSIS
eqn2graph [ -unsafe ] [ -format fmt ]
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.
Your input EQN code should not have the .EQ/.EN preamble that normally
precedes it within groff(1) macros; nor do you need to have dollar-sign
or other delimiters around the equation.
The output image will be clipped to the smallest possible bounding box
that contains all the black pixels. Older versions of convert(1) will
produce a black-on-white graphic; newer ones may produce a black-on-
transparent graphic. By specifying command-line options to be passed
to convert(1) you can give it a border, force the background transpar-
ent, set the image's pixel density, or perform other useful transforma-
tions.
This program uses eqn(1), groff(1), and the ImageMagick convert(1) pro-
gram. These programs must be installed on your system and accessible
on your $PATH for eqn2graph to work.
OPTIONS
-unsafe
Run groff(1) in the `unsafe' mode enabling the PIC macro sh to
execute arbitrary commands. The default is to forbid this.
-format fmt
Specify an output format; the default is PNG (Portable Network
Graphics). Any format that convert(1) can emit is supported.
Command-line switches and arguments not listed above are passed to con-
vert(1).
FILES
/usr/share/groff/1.22.3/tmac/eqnrc
The eqn(1) initialization file.
ENVIRONMENT
GROFF_TMPDIR
The directory in which temporary files will be created. If this
is not set eqn2graph searches the environment variables TMPDIR,
TMP, and TEMP (in that order). Otherwise, temporary files will
be created in /tmp.
BUGS
Due to changes in the behavior of ImageMagick convert(1) that are both
forward and backward-incompatible, mismatches between your eqn2graph
and convert(1) versions may produce zero-sized or untrimmed output
images. For this version of eqn2graph you will need a version of con-
vert(1) that supports the -trim option; older versions of eqn2graph
used -crop 0x0, which no longer has trimming behavior.
ATTRIBUTES
See attributes(7) for descriptions of the following attributes:
+---------------+------------------+
|ATTRIBUTE TYPE | ATTRIBUTE VALUE |
+---------------+------------------+
|Availability | text/groff |
+---------------+------------------+
|Stability | Uncommitted |
+---------------+------------------+
SEE ALSO
pic2graph(1), grap2graph(1), eqn(1), groff(1), gs(1), convert(1).
AUTHORS
Eric S. Raymond <esr@thyrsus.com>. This documentation is released to
the public domain.
NOTES
Source code for open source software components in Oracle Solaris can
be found at https://www.oracle.com/downloads/opensource/solaris-source-
code-downloads.html.
This software was built from source available at
https://github.com/oracle/solaris-userland. The original community
source was downloaded from
https://ftp.gnu.org/gnu/groff/groff-1.22.3.tar.gz.
Further information about this software can be found on the open source
community website at https://www.gnu.org/software/groff.
Groff Version 1.22.3 4 November 2014 EQN2GRAPH(1)