Baslinux mailing list

[sindi keesan <keesan AT sdf.lonestar.org>]

I have a pdf file made by scanning a document (Bach Partita for keyboard 
No. 5 which I hope eventually to record as midi using Rosegarden) that I 
can convert with netpbm or gs (pdfimages or similar) to 20 sequentially 
numbered pbm files (black and white bit-mapped) which I can print one at a 
time with
ljtopbm filename.pbm > /dev/lp0
(plus a switch for resolution since the default is 150 dpi).

I want to print the even numbered files and then turn over the stack and 
print the odd numbered files starting from the highest number, for 
instance print 0, 2, 4, 6, 8.....20 and then turn over and print 19 17 
15.......1 so I can use a three-ring binder and flip pages and see two 
pages at one time.  (Otherwise I could print the first 10 pages then turn 
over and print the last 10).

I could split it up into two parts:

ljtopbm filename.pbm > filename.lj; cat filename.lj > /dev/lp0

for i in *;  do ljtopbm $i.pbm > $i.lj; done      ?????

But then how do I add 2 to a filename ending in 2 digits and cat the 
result to the printer?

Would there be a print buffer problem if I sent 20 pages to the printer at 
once?  Gs is so slow to convert that it is the bottleneck, not the 
printer.

All suggestions welcome, even if they require gs or xpdf to print.

I should read about how to write scripts.

Sindi