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From: David Masterson <dsmasterson AT gmail DOT com>
Subject: Re: LPR output disappearing
Date: Tue, 01 Jul 2014 12:45:25 -0700
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Andrey Repin <anrdaemon AT yandex DOT ru> writes:

> Greetings, David Masterson!
>
>>> Acrobat -> printer driver -> printer
>>>
>>> Without the step in the middle, usually, garbage is expected;
>>> only exception is when sending a Postscript file to a Postscript printer.
>
>> Rephrasing the question -- where in that chain does the translation of
>> PDF to something the printer can print occur?
>
> Between Acrobat Reader and printer driver and inside printer driver itself.
> Acrobat Reader transform PDF into something printer-digestible (WMF f.e.),
> printer driver convert it into actual printer instructions.

Hmmm.  And how does this differ from what happens in Cygwin when GV
sends PDF to a printer via LPR?

>> I'm pretty sure that this printer (Dell A10) is not a Postscript printer, so
>> the PDF is not being translated into PS.
>
> That has no connection. The document COULD be translated into PS before
> sending it to printer driver, if the driver support that input format.
> As I said, there could be more than one translation occuring.

Hmmm.  Still something I am not getting:

1. GV under Cygwin can display the PDF fine.  That's what GV is meant to
do -- be a viewer for PDF/PS.
2. GV has a print capability.  By default, it (seems to) uses LPR for
the printout mechanism.

Therefore, if #2 ever works, then there must be an assumption about how
it works that works for most (all?) printers.  What is that assumption?

>> As I understand it, the job of the printer driver
>> is to forward the data sent by the application to the printer
>> (ie. manage the hardware).  Therefore, the translation of PDF to
>> something that the printer can print either occurs in the application
>> (ie. Acrobat or GV) or in the printer (unlikely).  What am I missing?
>
> See above. Your question has no simple answer.

Undoubtedly.  Under Adobe, the print capability works whereas, under GV,
it doesn't seem to work.  I still do not have a means of determining
why.

> WBR,
> Andrey Repin (anrdaemon AT yandex DOT ru) 01.07.2014, <20:05>

-- 
David Masterson
Programmer At Large


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