David Griffiths wrote:
Hi, I'm new to pic/groff and I've been having some problems
producing either gif or jpeg images using them. ....
Anyway I started out following some instructions here: http://
www.spinellis.gr/sw/umlgraph/doc/faq.html#antialias but the
resulting command was very slow. Here are my findings as pasted
from my internal blog. I wondered if they made sense or if I'm
missing some simpler approach to the whole thing (btw I need the gs
stage because using -T gif in groff produces very poor text, no
antialiasing).
Yes, there's a far simpler approach. Use this command:
groff -p -Thtml test > test.html
which is equivalent to:
pic test | groff -Thtml > test.html
This renders your text as HTML, which probably won't do what you
really want with the text unless you're using -man or -ms macros, but
will render each picture, table, and equation as a PNG file. If all
you need is the rasterized pictures, you're golden. :-)
Actually, now that I think about it, you probably need to use the -ms
macros to get the pics to render properly. Either that, or edit your
input file thus:
.PS
.HTML-IMAGE
# pic commands here
.HTML-IMAGE-END
.PE
From my blog:
I missed the hint in the FAQ and after a bit of messing around got
the following command to work:
pic test | groff | ps2eps | gs -dDEVICEHEIGHTPOINTS=1000 -q -r360 -
dNOPAUSE -sDEVICE=pnm -sOutputFile=- - -c quit | pnmcrop | pnmscale
0.5 | ppmtogif > test.gif
I had to add the -dDEVICEHEIGHTPOINTS=1000 option because without
that it chopped off the top of the picture.
Ah, looking at the referenced FAQ, it appears that your groff uses A4
paper size by default. To fix that temporarily, change "groff" in the
above pipeline to "groff -P-pletter" -- you can also change it
permanently by editing the .../groff/<version>/font/devps/DESC file
to contain the line "papersize letter" and removing any other
"papersize" line in the file.
Hope that helps!
--
Larry Kollar k o l l a r @ a l l t e l . n e t
Unix Text Processing: "UTP Revival"
http://unixtext.org/
_______________________________________________
Groff mailing list
Groff@gnu.org
http://lists.gnu.org/mailman/listinfo/groff
