Re: Spooled File Overlays

[PaulMmn <PaulMmn@xxxxxxxxxxxxx>]

IIRC, an AFP data stream actually generates a bit map of the printed
page and sends that to the printer.  For every page.

An IPDS data stream, on the other hand, sends the bit map of the
overlay to the printer once, then sends just the variable data for
each page.  If the printer understands IPDS properly, it's supposed
to be able to cache overlays at the printer for later reuse.

When we first started using overlays, we were sending AFP streams to
remote printers, and they c-r-a-w-l-e-d.  We then got the IPDS
interface cards, and things returned to manageable speed.

--Paul E Musselman
PaulMmn@Ix.netcom.nospam.com




>  > > I think this has something to do with the type of spool
>>  > file.  I believe you
>>  > can specify a different overlay for *SCS spool files but
>>  > can't for *AFPDS.
>>  > Seems like I recall reading that *AFPDS embeds the
>>  > overlay as part of the
>>  > data stream.
>>  >
>>  > Dave
>
>Our experience of AFP files is that they contain the overlays,
>graphics, etc. embedded in the print stream. As a matter of
>fact, every page has the overlay and graphics on it, making the
>pages huge.
>
>
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