PIC2GRAPH(1)		    General Commands Manual		  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  diagrams of the kind frequently used in technical papers
       and textbooks.  The language is sufficiently flexible to be quite  use-
       ful  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 procedural 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 transpar-
       ent, set the image's pixel density, or perform other useful transforma-
       tions.

       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  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.

       -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)  pro-
	      cessing.

       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 backward-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  version  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)