🚀 go-pugleaf

In article <9104171649.AA25809@crayola.cs.UMD.EDU> matt@EECS.NWU.EDU (Matt Larson) writes:
>Is there a sequence that always means, ``End of the page; print it''?
>I thought that's what the formfeed character (ASCII 12) did.  I tried
>counting formfeed characters, but that doesn't seem to work: there are
>way too many.  My current guess is that the formfeed character really
>means what I think it means, but that it is also possible for
>formfeeds to be part of other commands or in some sort of "quoted
>string."  If I am on the right track, then the question is: How do I
>tell the real formfeeds that mean end of page from the other ones?

You will have to put together a mini escape-sequence parser.  Graphics
commands such as <esc>*b#W write a block of raster data out (the #
stands for the numeric parameter specifying how many bytes of data
follow).  Anything that looks like a formfeed that is part of raster
data should obviously not count as a page end!

Also, the sequence <esc>E (reset PCL command) will close and print
a page IF there was anything on it.  It's possible that the last page
in a multipage file might not end with a formfeed if they're using
<esc>E.

Information on all of this is in the Technical Reference Manual that
comes with your printer.  If you don't have one, get one!

Disclaimer:  I use LaserJets, I don't write their code ;@)

Andrea Frankel, Hewlett Packard, San Diego Technical Graphics Div., R&D Lab
	"wake now!  Discover that you are the song that the morning brings..."
______________________________________________________________________________
Internet : andrea@sdd.hp.com (or andrea%hp-sdd@nosc.mil or @ucsd.edu)
UUCP     : {hplabs|nosc|hpfcla|ucsd}!hp-sdd!andrea 
CSNET    : andrea%hp-sdd@hplabs.csnet
USnail   : 16399 W. Bernardo Drive - Mailstop 61U65, San Diego CA 92127-1899
Voice    : (619) 592-4664