Louis
GDI mode in UV is exactly that: it uses Windows device calls to render on the
printer. These calls render text/graphics at a high/abstract level, leaving
the specific implementation of e.g. Font handling to the device driver.
The problem comes when you want to send sequences that are not part of the
text, eg. PCL. In effect this is duplicating the work of the GDI itself - PCL
is not directly supported by Windows GDI - even if the HP drivers map some GDI
calls into PCL. Most GDI switches into graphics mode so escape sequences like
PCL get lost OR interpreted as literal characters. Quite simply, Windows has no
way of knowing that you want to pass these sequences through unmodified.
The only way to force through PCL without interpretation is to use a
generic/text only driver, if it will work with your printer. Unfortunately
(increasingly) that isn't always the case.
It isn't really a UV failing but a clash of models: Windows, unlike Unix,
expects applications to play by its rules and that doesn't include sendiny raw
control sequences to devices.
AD - sort of:
I've become frustrated by this and other spooler limits and so wrote an API
that now produces PDF documents and Windows prints directly from UV bypassing
the spooler. This supports full text and graphics control, and conversion of
existing prints. I'm packaging this for release hopefully in a couple of months
- it has been running at a client site for about 9 months - and I have plans to
add PCL interpretation as well.
Anyone interested please contact me off-list.
Brian
prints windows -
-----Original Message-----
From: "Louis Windsor"<[EMAIL PROTECTED]>
Sent: 22/05/06 03:53:25
To: "[email protected]"<[email protected]>
Subject: Re: [U2] Help with non functional printer
With further "messing about" using the GDI,DEFAULT addition I now can
print text at least.
It doesn't seem to support even PCL3 as a simple orientation string (to
select landscape printing) is ignored. Also the graphic set, like "light
down
and left/light down and right/light horizontal etc are completely screwed.
Well, at least I can now print text so that is a gain but any further
suggestions
to print graphic characters would be appreciated.
I am really puzzled as under Windows it is a superb printer. Does
everything
I hoped it would but un UniVerse ....
Thanks for the responses so far,
Louis
----- Original Message -----
From: "Bruce Nichol" <[EMAIL PROTECTED]>
To: <[email protected]>
Sent: Monday, May 22, 2006 9:02 AM
Subject: Re: [U2] Help with non functional printer
[Message truncated. Tap Edit->Mark for Download to get remaining portion.]
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