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printing - Printer Job Language -- gt; PDF - Super User The @PJL lines indicate a Print Job Language header that was inserted before the actual print job PJL is used to control print job options (such as duplexing, paper tray selection, stapling, punching, folding the output) It was invented by HP The print job's format could be anything -- lots of printer vendors support and use it for their own (proprietary) printer language The interesting
HP USB P2015 printers create new virtual USB ports in Windows . . . Because Windows 7 creates a new virtual device for every device based on its serialnumber, I decided to try to fake Windows into picking different physical devices as the same one, by changing the serial number the printer passes on to Windows, so for Windows there's no different device being plugged in and it maps it on the same virtual port I had a look at PJL (Printer Job Language); found
Force scaling when printing an alien paper size - Super User Yes, I'm using CUPS The main printer we're testing with is a Lexmark T640 I found a workaround using -o raw and PJL commands, but I'd prefer a way to do it with CUPS options (in case we ever need to print to a non-PJL printer)
printer - Converting PJL PCL to pdf - Super User PJL commands are used to change printer settings (as you can see by reading the PJL) They do not print any data The actual print file is on the first (and fifth) line: censored-filename} PDF
printer - What Format is this File (starting with !R! SEM 9;EXIT . . . !R!SEM6;EXIT; is a command used by kyocera printers and copiers (which probably was the printerdriver used to generate this file) !R! stands for the recognation code for prescribe commands SEM stands for Set Emulation Mode this command temporary changes the emulation mode The 6 means HPIII emulation EXIT ends the execution The following lines with @PJL indicate a "Print Job Language header
Find out if a printer supports postscript - Super User Try sending this: "<ESC>%–12345X@PJL <CR><LF>@PJL ENTER LANGUAGE = POSTSCRIPT <CR><LF>%!PS Adobe showpage <ctrl-D>" Send it without the quotes, and <ctrl-D> is the EOT character (hex 04), <CR> and <LF> are hex 0D and 0A That will print a blank page if it supports PS, or print the text from %!PS if it does not