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CentOS 7.0 - man page for pic2graph (centos section 1)

PIC2GRAPH(1)									     PIC2GRAPH(1)

NAME
       pic2graph - convert a PIC diagram into a cropped image

SYNOPSIS
       pic2graph [ -unsafe ] [ -format fmt ] [ -eqn delim ]

DESCRIPTION
       Reads  a  PIC  program  as  input;  produces an image file (by default in Portable Network
       Graphics format) suitable for the Web as output.  Also translates eqn(1) constructs, so it
       can be used for generating images of mathematical formulae.

       PIC is a rather expressive graphics minilanguage suitable for producing box-and-arrow dia-
       grams of the kind frequently used in technical papers and textbooks.  The language is suf-
       ficiently  flexible  to be quite useful for state charts, Petri-net diagrams, flow charts,
       simple circuit schematics, jumper layouts,  and	other  kinds  of  illustration	involving
       repetitive  uses of simple geometric forms and splines.	Because PIC descriptions are pro-
       cedural and object-based, they are both compact and easy to modify.

       The PIC language is fully documented in Making Pictures With GNU PIC, a document which  is
       part of the groff(1) distribution.

       Your  input PIC code should not be wrapped with the .PS and .PE macros that normally guard
       it within groff(1) macros.

       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 pic(1), eqn(1), groff(1), gs(1), and the ImageMagick convert(1) program.
       These programs must be installed on your system and accessible on your $PATH for pic2graph
       to work.

OPTIONS
       -unsafe
	      Run pic(1) and 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 for-
	      mat that convert(1) can emit is supported.

       -eqn delim
	      Change the fencepost characters  that  delimit  eqn(1)  directives  ($  and  $,  by
	      default).   This	option requires an argument, but an empty string is accepted as a
	      directive to disable eqn(1) processing.

       Command-line switches and arguments not listed above are passed to convert(1).

FILES
       /usr/share/groff/1.22.2/tmac/eqnrc  The eqn(1) initialization file.

ENVIRONMENT
       GROFF_TMPDIR
	      The directory in which temporary files  will  be	created.   If  this  is  not  set
	      pic2graph 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  back-
       ward-incompatible,  mismatches  between your pic2graph and convert(1) versions may produce
       zero-sized or untrimmed output images.  For this version of pic2graph you will need a ver-
       sion  of  convert(1)  that  supports  the  -trim  option; older versions of pic2graph used
       -crop 0x0, which no longer has trimming behavior.

SEE ALSO
       eqn2graph(1), grap2graph(1), pic(1), eqn(1), groff(1), gs(1), convert(1).

AUTHOR
       Eric S. Raymond <esr@thyrsus.com>, based on a recipe by W. Richard Stevens.

Groff Version 1.22.2			 7 February 2013			     PIC2GRAPH(1)


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