"thanx andy nbut have any c source to do interface?"

'fraid not.

The epanorama site has a wealth of info on the PC Parallel port, and a search here should also give you plenty of tips for the physical interface between your 8051 and the printer.
(or, if it's a serial printer, there's loads here!)

You will have to read the PCL docs to determine how to implement the graphic functions you require.
Keep searching the internet - I saw refences to several PCL code libraries (mostly at cost).

You might find it easier to prototype your graphics functions on a PC.
There are free PCL viewers available for the PC to save you some paper!