PIC2GRAPH(1)PIC2GRAPH(1)NAMEpic2graph - convert a PIC diagram into a cropped image
SYNOPSISpic2graph [ -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 a black-on-white graphic clipped to the small‐
est possible bounding box that contains all the black pixels. By spec‐
ifying command-line options to be passed to convert(1) you can give it
a border, set the background transparent, set the image's pixel den‐
sity, 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 $PATH for pic2graph to work.
OPTIONS-unsafe
Run pic(1) and groff(1) in the `unsafe' mode enabling the PIC
macro sh to execute arbitrary commands. The default is to for‐
bid this.
-format fmt
Specify an output format; the default is PNG (Portable Network
Graphics). Any format that convert(1) can emit is supported.
-eqn delim
Change the fencepost characters that delimit eqn(1) directives
($ 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 con‐
vert(1).
FILES
/usr/share/groff/1.18.1/tmac/eqnrc The eqn(1) initialization file.
SEE ALSOeqn2graph(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 1.18.1 17 July 2002 PIC2GRAPH(1)
