PTPC related

Seetha Ramaih Setty 1

Hi!

We are developing GPD based printer driver.
To customize the UI, we have implemented IPrintOemUI2 interface.
We have also implemented IPrintOemUni2 for the rendering part.
So, far so good. it is working fine.

Then we wanted to implement the PTPC support. For this we have implemented IPrintOemPrintTicketProvider. But unfortunately we not not getting the callbacks related to the IPrintOemPrintTicketProvider, like ConvertDevModeToPrintTicket method.

When we checked, we found that the DllGetClassObject is being called for IPrintOemUI2 & IPrintOemUni2 implementations. But for IPrintOemPrintTicketProvider implementation, the DllGetClassObject is not getting called.

Can you please let me know if i am missing any thing here. Maybe like registering the interface or some kind of hooking up?

To give more info, each interface is implemented in a separate dll.

Thanks
Seetharam

RLWA32 43,306 Reputation points

2021-07-13T11:43:06.81+00:00

I don't write drivers but from a COM perspective your assumption is that the stated interfaces should be implemented in separate COM objects. Are you certain of that? Or should IPrintOemPrintTicketProvider be implemented and exposed by the COM object for which DllGetClassObject is actually getting called?
Seetha Ramaih Setty 1 Reputation point

2021-07-14T10:59:06.81+00:00

Thank you for your reply.

Right now i have tried by creating a different COM object (different dll). I will try to add to the interface implementation to the existing dll and check if this works. Will let you know after my trial
RLWA32 43,306 Reputation points

2021-07-14T11:01:40.833+00:00

Have you searched the Microsoft driver documentation and samples to see if you can find exactly how your desired interface pointer can be obtained?
Seetha Ramaih Setty 1 Reputation point

2021-07-14T11:56:26.813+00:00

Yes. I have implemented similar to the microsoft sample provided in github archive.
In the documentation, they have just mentioned to implement this interface, IPrintOemPrintTicketProvider, but has not mentioned any more details or how to implement?
RLWA32 43,306 Reputation points

2021-07-14T12:46:16.3+00:00

I suggest you add tags for windows-hardware-wdk and windows-hardware-wdk-general. Maybe someone with driver experience can guide you.
Seetha Ramaih Setty 1 Reputation point

2021-08-02T13:58:48.32+00:00
Hi

Thank you for you suggestion.
I have added the tags. But no response until now.

Anyway i have added the interface implementation in the same dll, but no luck.

But finally i have solved the issue myself
With the separate dll only this was solved.

I have to add some configurations which is have missed.
I have rechecked the following by which i could make my code work.

IImplemented the IPrintOemPrintTicketProvider as a separate dll

Then added this dll entry in .inf file

Updated the GPD to have custom feature added in it

Implemented the schema matching the feature added in the GPD file and at last

has added an entry of this new dll in the .ini file as follows:
OEMConfigFile2=xxxxPTPC.DLL, the first file OEMConfigFile1 being the custom UI file's entry
RLWA32 43,306 Reputation points

2021-08-02T14:07:02.417+00:00

Sorry to hear that you didn't receive additional assistance but its good news that you solved the problems yourself.

I suggest you convert the comment in which you give the solution steps into an Answer and Accept it so that others may more easily find your solution if they have the same issues.

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PTPC related