NAME | SYNOPSIS | DESCRIPTION | OPTIONS | FILES | ENVIRONMENT | BUGS | SEE ALSO | AUTHORS | COLOPHON

EQN2GRAPH(1)               General Commands Manual              EQN2GRAPH(1)

NAME         top

       eqn2graph - convert an EQN equation into a cropped image

SYNOPSIS         top

       eqn2graph [ -unsafe ] [ -format fmt ]

DESCRIPTION         top

       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 transparent, set the image's pixel density, or perform
       other useful transformations.

       This program uses eqn(1), groff(1), and the ImageMagick convert(1)
       program.  These programs must be installed on your system and
       accessible on your $PATH for eqn2graph to work.

OPTIONS         top

       -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
       convert(1).

FILES         top

       /usr/local/share/groff/1.22.3/tmac/eqnrc
              The eqn(1) initialization file.

ENVIRONMENT         top

       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         top

       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 convert(1) that supports the -trim option; older versions of
       eqn2graph used -crop 0x0, which no longer has trimming behavior.

SEE ALSO         top

       pic2graph(1), grap2graph(1), eqn(1), groff(1), gs(1), convert(1).

AUTHORS         top

       Eric S. Raymond <esr@thyrsus.com>.  This documentation is released to
       the public domain.

COLOPHON         top

       This page is part of the groff (GNU troff) project.  Information
       about the project can be found at 
       ⟨http://www.gnu.org/software/groff/⟩.  If you have a bug report for
       this manual page, see ⟨http://www.gnu.org/software/groff/⟩.  This
       page was obtained from the tarball groff-1.22.3.tar.gz fetched from
       ⟨ftp://ftp.gnu.org/gnu/groff/⟩ on 2016-07-16.  If you discover any
       rendering problems in this HTML version of the page, or you believe
       there is a better or more up-to-date source for the page, or you have
       corrections or improvements to the information in this COLOPHON
       (which is not part of the original manual page), send a mail to
       man-pages@man7.org

Groff Version 1.22.3           4 November 2014                  EQN2GRAPH(1)