[Desktop_printing] Current PCL laser drivers are SLOOOOWW!

Till Kamppeter till.kamppeter at gmx.net
Tue Feb 14 08:15:11 PST 2006

Hin-Tak Leung wrote:
> How does the openprinting driver bridge into ghostscript (or does it at all)?
> The IJS interface is basically pumping bitmaps and is slow 
> (but given the printers are slower). 

If there is a page with complicated graphical elements and the printer
is a modern USB2 printer, the printer can be faster than the data transfer.

> I am not sure about PCL 5, but PCL-6/XL certainly have vector drawing features.
> It is just difficult to join them up with ghostscript without hooking inside,

ESP GhostScript has an appropriate interface (device "opvp").

> (and pxlmono is currently not doing things this way due to
> laziness/priorities),
> but I can not see hpijs's pcl-xl code working this way, just because
> ijs doesn't pass vector instructions.

One would have to interface the driver with OPVP and not with IJS.


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