help getting started with hacking driver

[matt]

Hi, I'm hoping to learn how to hack a printer driver so that I can make my printer do my bidding.  I'm going to start with an HP 890C, and what I'd like to accomplish is to have the printer lay out the ink for a line, pause a few sec. to let it dry and then print the same line again (for printing an image at the highest quality the printer can handle).  The idea is to make the ink twice as dense on my transperency.  I'd only be using black ink.  If anyone could point me in the right direction of how to get started doing this I'd be much apprechated.

I'm definatly no expert, I have some good linux knowlege, and some really beginner programming - but I'm willing to learn.  What language are cups drivers written in?  Are they actually called drivers, or something else?  I'm not afraid to learn and read, but I don't know where to start.  Thanks for any help or sigguestions.

Obviously I can't run it through the printer twice as there's no way to make sure the rollers pick it up and start at exactly the same place as before.  I have also tried printing the image twice on seperate pieces of paper and found that the image can differ by one or two pixels - which isn't accectable for what I'm trying to do.


--Matttail