[WinPrnDev] Re: Creating a Printer Driver
- From: Sam Elamin <hussam_88@xxxxxxxxxxx>
- To: <winprndev@xxxxxxxxxxxxx>
- Date: Thu, 25 Mar 2010 16:21:24 +0000
Jason
I dont understand the problem, do you mean XPS based printer driver would
contain fonts while an SPL wouldnt?
Also yes this project is a proof of concept mainly aimed at a windows platform,
we already have a web based print solution that allows students to upload
documents.
Now we are trying to implement it as a print driver so people can just go,
"file, print to". To make it a much more fluid process.
Now what I am lost in is why use an XPS based driver? what do you mean by XPS
contains fonts because from what i can see from your email.
Both SPL and XPS contain fonts, but what fonts are you talking about exactly?.
Regards
Sam
From: jharrison@xxxxxxxxxxx
To: winprndev@xxxxxxxxxxxxx
Subject: [WinPrnDev] Re: Creating a Printer Driver
Date: Thu, 25 Mar 2010 08:33:01 -0700
Actually the SPL file format is well documented by Microsoft, as
is EMF. You can find the descriptions at msdn.microsoft.com
However, because SPL files can contain fonts, etc, it is probably
a much better idea to use and XPS based printer driver because the XPS will
contain all of the fonts and can be sent to a printer on the server much more
easily and reliably than a SPL file can.
However, if the students that Sam alludes to are using Mac or
Linux computers (laptops?) then he’ll have to support that format too.
It might be better to use a simple web page that allows students
to upload the original document to be printed, and a script on the windows
server side that downloads the document and calls ShellExecuteEx to print it.
The server would have to be Windows (if you’re using ShellExecuteEx) but
the remote computers could be anything.
But as we eluded, unless all of the use cases and requirements
have been fully discussed ahead of time, this could pose a security risk, or
miss
implementing a required feature. On the other hand if this is just a proof of
concept/experiment then the cost of failure is much lower.
-Jason
--
Jason Harrison
Sr Software Developer
PDFTron Systems, Inc.
www.pdftron.com
Tel: 1-604-730-8989
Fax: 1-604-676-2477
Email: jharrison@xxxxxxxxxxx
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P Please think before you print!
From:
winprndev-bounce@xxxxxxxxxxxxx [mailto:winprndev-bounce@xxxxxxxxxxxxx] On
Behalf Of Abdul Qader
Sent: Thursday, March 25, 2010 2:33 AM
To: winprndev@xxxxxxxxxxxxx
Subject: [WinPrnDev] Re: Creating a Printer Driver
Sam,
The SPL file is the spool file created by the spooler
service . It can have two formats EMF and RAW. A RAW format is just a bit by
bit description of ever pixel and so it would be dumped to the printer by the
driver.
In case of EMF format all the commands that we use to paint
the window are stored .So by using the EMF you can play the commands to the
desired context to reproduce the whole image that you had created in your
window.
Technically extracting the EMF from the spool file is
undocumented. You can find the details in Windows Graphics
Programming written by Feng Yuan .
Abdul
On Thu, Mar 25, 2010 at 2:54 PM, Sam Elamin <hussam_88@xxxxxxxxxxx> wrote:
Abdul
I am trying to understand what you are saying.
Do you mean the spool file by "SPL"? and what do you mean by the EMF?
what does the Virtual Print Processor exactly do?
I am sorry for my complete ignorance but I am very new to the Print Driver
world (2 days to be exact) so these terms are all new to me.
Regards
Sam
Date: Thu, 25 Mar 2010 11:12:18 +0530
Subject: [WinPrnDev] Re: Creating a Printer Driver
From: abqader.iqbal@xxxxxxxxx
To: winprndev@xxxxxxxxxxxxx
Sam,
You can get the SPL files from the Printers folder.You will
need to extract the EMF from the spool file and play the EMF on the
corresponding context.
So you will need to create a Virtual Print Processor.The
path where the spool files are stored are kept in the registry.
The PrintProcessor exports some calls of which
PrintDocumentonPrintProcessor is what you need to look out for.
Please let me know if you need more info on this.We had
implemeted some thing close to what you did.
Thanks
Abdul
On Tue, Mar 23, 2010 at 9:48 PM, Sam Elamin <hussam_88@xxxxxxxxxxx>
wrote:
Hello Everyone
I am trying to develop a printer driver which will be installed on a client
side, what i need this driver to do is just save the path of documents sent to
it to a string and forward that string to an ASP.NET application which will
upload the document to a
print server.
now i already have the upload client working so here is the scenario which the
printer will work on.
Document "X" is printed to a printer with the installed driver
(Printer "A")
Printer "A" will then get the path of the given document and save it
to string "Path", "Path" will then be sent to a Webpage
which will upload it.
I kept it as basic as possible because i just want to know if it could be done?
Regards
Sam
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