Dot Matrix printers and Graphic printing

[DayTripperS]

Hi all,

I have a lot of dot-matrix printers in use in production.
The speed of printing is OK since I print directly to LPT port (I know that all printers are connected to LPT1 port).
This is fast-speed matrix printing.

The question is:
Is it possible to print a line (or a Logo, or just a few words) in Graphic mode. I must say it again: I dont use Printers unit... I don't know Printer name ... I print directly to LPT port.

Thanks and Best Regards
Simon

 

[buho]

Yes it is.

1) Carefully read your printer's manual to learn all the commands used to print graphics

2) Resize your graphic to solve the scaling factors

3) Dither your graphic in black/white to solve the color problems.

4) Send your graphic byte by byte using the commands the printer expects.

Like in the old DOS days, you know.

But may be you are lucky: if you are printing a standard logo/title you can make "2" and "3" manually in an external program and use the converted image (programatically dithering is a hell of a task, you need to define all the patterns first -scaling is not so difficult).

buho (A).