EQN2GRAPH(1)                                                                                                        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) suit-
       able for the Web as output.

       Your input EQN code should not have the .EQ/.EN preamble that 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 ver-
       sions 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
       -unsafe
              Run groff(1) in the `unsafe' mode enabling the PIC macro sh to execute arbitrary commands.  The default is to for-
              bid 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
       /usr/share/groff/1.20.1/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 convert(1) that  supports  the  -trim  option;  older  versions  of  eqn2graph  used
       -crop 0x0, which no longer has trimming behavior.

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

AUTHOR
       Eric S. Raymond <esrATthyrsus.com>.



Groff Version 1.20.1                                     9 January 2009                                             EQN2GRAPH(1)