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

       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

              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

FILES         top

              The eqn(1) initialization file.

ENVIRONMENT         top

              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.

AUTHORS         top

       eqn2graph was written by Eric S. Raymond ⟨⟩.

SEE ALSO         top

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

COLOPHON         top

       This page is part of the groff (GNU troff) project.  Information
       about the project can be found at 
       ⟨⟩.  If you have a bug report for
       this manual page, see ⟨⟩.  This
       page was obtained from the project's upstream Git repository
       ⟨⟩ on 2019-03-06.  (At that
       time, the date of the most recent commit that was found in the repos‐
       itory was 2019-03-03.)  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

Groff Version 1.22.3          24 November 2017                  EQN2GRAPH(1)

Pages that refer to this page: grap2graph(1)groff(1)pic2graph(1)