🚀 go-pugleaf

> Is there any public domain postscript library that is callable from C?

It depends what you want to draw. I've written programs both for:

     1. drawing a picture which is to be viewed later
and  2. drawing a picture which is to be viewed while the program's running

I can email sample code to anyone who is interested in this stuff.
Basically, however, it's just a matter of sending PostScript commands
either:

   1. to a file
or 2. to GhostScript, using the "flushpage" command to force the screen
      to be updated

And this means that you have to know PostScript programming.

If there were some library calls, there would be a very simple mapping
to PostScript, so you either learn the library or you learn PostScript.

Learning some simple PostScript is not hard.

-------------------------------
   psline(x1, y1, x2, y2)

   printf("%d %d moveto %d %d lineto stroke\n", x1, y1, x2, y2);

-------------------------------
psopen() would just be either
   1. opening the file
or 2. popen() to GhostScript


-------------------------------
   pstext(x1, y1, str);

Would just be

   printf("Times-Roman findfont 12 scalefont setfont\n");
   printf("%d %d moveto (%s) show\n", x1, y1, str);

------------------------------
   psclose();

Would close the file pointer to either
   1. the file you opened
   2. the popen()

-Jon
%! Jon Monsarrat   jgm@cs.brown.edu   Brown University %! Obfuscated PostScript
/p 4/f{{}forall moveto gsave{dup 32 mod dup 15 mul rotate sub p div 0 rlineto}
forall fill grestore}def 4 scale 1 def(``f`f`f)dup(  )f( i).3 setgray f/p 8 def
1 setgray/h(F!6! 2477!W)def h("4)h(,C)h(6O)h(LT)h(^O)h(tC)h(~6)(7!6!"7#$&6!7 #)
(9~)(""""""""""")(}~)(fTV``Vt)(9!)(e!FR"n&44ED-w@-7&&b)(C2)11{f}repeat showpage