I think that everything that has been said is correct. However, I think that
"banding" would only come into play for graphic elements. It has been a very
long time since I last coded for an old DeskJet (or any DeskJet for that
matter - the last ones being the original DeskJet and the DeskJet Plus).
IIRC since the DeskJets have a very small buffer, everything needs to be
sent to the printer in the order that it will be printed. On a Laser printer
generally the whole page is produced in printer memory and then printed. So
on a laser printer things can be sent for a page in any order. Perhaps the
newer DeskJets are endowed with bigger buffers - and enhanced PCL support.
How did the text print? I was concerned that even if the PCL could be made
to print properly. The printer would be unable to use the desired fonts.
It may be possible to modify the PCLRenderer to create a DeskJetRenderer by
using a buffer in the renderer to sort everything on the page into the
proper order. Graphic banding could also be done - but this is nontrivial.
You may want to take a peek at the TXTRenderer as this uses a buffer to
order the output (it also fills as necessary). If it is just an ordering
problem. Then perhaps an intermediate renderer could be added that would do
the sorting and then call the PCLRenderer (for non-graphic stuff anyway).
I do not know if this will be any help. My memory of DeskJet programming is
quite foggy. I hope that what I have said is mostly correct.
Art
-----Original Message-----
From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]]
Sent: Thursday, September 13, 2001 9:45 AM
To: [EMAIL PROTECTED]
Subject: RE: PCL Problems on HP Deskjet 400
Correct, it is rendered as PCL 5, but it seems almost all of the Deskjets
only go up to PCL 3. I have a Deskjet 820 that has a pretty good result
from the same document. HP told me that the older printers can't adapt as
well as the newer ones to the more complex PCL.
-Tony
-----Original Message-----
From: Jeremias Maerki [mailto:[EMAIL PROTECTED]]
Sent: Thursday, September 13, 2001 9:21 AM
To: [EMAIL PROTECTED]
Subject: Re: PCL Problems on HP Deskjet 400
I've had a quick look at the HP website. Your DJ 400 is a PCL 3 printer.
Art Welch said the PCL renderer produces PCL5, so this might actually be
the real problem.
Concerning my comment about banding, unfortunately, I haven't found any
information at the HP website.
On Thu, 13 Sep 2001 08:44:55 -0400 avespa wrote:
> Interesting.... how might I go about testing this? Could I change the
> renderer and how would I do it? Could I test this by re-arranging PCL
code
> in the document I produce?
>
> I render an XML stream into a PCL document, then I send it to the printer
in
> a separate step. How could I 'band' this?
>
> -Tony
>
> -----Original Message-----
> From: Jeremias Maerki
> To: [EMAIL PROTECTED]
> Sent: 9/13/01 2:34 AM
> Subject: Re: PCL Problems on HP Deskjet 400
>
> Hi
>
> I don't know much about PCL, but I know this: PCL laser printers usually
> build a whole page in memory and then print it to paper. They normally
> have a decent amount of memory. Especially older ink jet printers like
> yours only have a small buffer, so the page has to be delivered in bands
> (I think). That's probably what causes your problems. Maybe the PCL
> renderer would have to be changed so it can output a page as a sequence
> of bands. To visualize, see here:
>
> +---------+
> | Band 1 |
> +---------+
> | Band 2 |
> +---------+
> | Band 4 |
> +---------+
> | etc. |
> +---------+
> | |
> +---------+
>
> I think this is really what messes up your headers and footers.
>
> On Wed, 12 Sep 2001 17:32:48 -0400 avespa wrote:
> >
> > Question - I am testing a PCL generated file on an HP DeskJet 400
> Printer,
> > circa 1995 with Windows 95. I am seeing rather funky behavior, with
> the
> > headers and footers being messed up (it looks like a few of the lines
> were
> > written and then written over - perhaps a page break issue in our
> XSL)- our
> > XSL is quite heavy and complex, so I am not sure where to start. I am
> > wondering if I need to take the approach of looking at our XSL and
> seeing
> > where it can be tuned or tweaked to change this behavior, or do I need
> to go
> > to the PCL itself? I'm wondering if someone could nudge me in a
> certain
> > direction?
> >
> > The output looks fairly decent on an HP8000 or HP820. I called HP and
> they
> > weren't much help.
> >
> > Thanks for any help or input,
> >
> > Tony
> >
> >
> > ---------------------------------------------------------------------
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>
> Freundliche Grüsse
> OUTLINE AG
> Jeremias Märki
>
> mailto:[EMAIL PROTECTED]
>
> Postfach 3954 - Rhynauerstr. 15 - CH-6002 Luzern
> Fon +41 (41) 317 2020 - Fax +41 (41) 317 2029
> Internet http://www.outline.ch
>
>
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>
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Freundliche Grüsse
OUTLINE AG
Jeremias Märki
mailto:[EMAIL PROTECTED]
Postfach 3954 - Rhynauerstr. 15 - CH-6002 Luzern
Fon +41 (41) 317 2020 - Fax +41 (41) 317 2029
Internet http://www.outline.ch
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