ref: 41cac3f16dad7eed71a585f50bbf3ea2ce507c73
dir: /sys/src/cmd/postscript/postbgi/README/
BGI (Basic Graphical Instructions) to PostScript translator. Probably not useful outside the Computer Centers. Added code to tie lines to device space coordinates. Helps eliminate variations in line widths noticeable when users selected a non-zero linewidth with the -w option. Much that was omitted from early versions of the program has been implemented. What's in place will handle most STARE (black and white) and PRISM (color) BGI jobs. PRISM jobs often fill regions with color, and need require device specific tuning to get things just right. An easy solution is add "-P/prism true def" option to the postbgi command line when you translate PRISM jobs. A typical command line for STARE jobs would be, postbgi file >file.ps while for PRISM jobs use, postbgi -P"/prism true def" file >file.ps