PPDs generated and installed, but now what? (Filter definitions)

[peer at baden-online.de]

In order to make a driver for the Seike Smart Label Printer Series, I managed to create a seiko-slp-<*>.drv file and to compile it to the different seiko-slp-<*>.ppd files, and I can install them in the cups system, then set paper sizes and other options just fine.

But now what?

The printer is neither PCL nor ESC/P, but some relatively simple custom format, the specification of which can be downloaded with the Smart SLP SDK from their web site, which I have.

Where do I find the interface specification which I need to create a filter for the low-level SLP printer language?

And hopefully some models I can base my filter on?

Since I do not really know C yet, I plan to make a python script first. It could accept raster image data via STDIN and produce the resulting slp language commands and data via STDOUT. But I need the specification of the interface which I did not find so far.

AFAIUnderstand, the interface seems to reside in these parts of the example (of the docs):

 // Include ESC/P driver definitions
#include <escp.h>

// Specify that this driver uses the ESC/P driver...
DriverType escp

// Specify the driver options via the model number...
ModelNumber ($ESCP_ESCK $ESCP_EXT_UNITS $ESCP_EXT_MARGINS $ESCP_USB
             $ESCP_PAGE_SIZE $ESCP_RASTER_ESCI)

Is this right? So how do I interface a command line tool with this?

And what about these "commandtoescpx" and "rastertoescpx": do I have to create both types?

I made the following statements in my .drv file:

// Driver Definition
DriverType custom

// Each filter provided by the driver...
Filter application/vnd.cups-raster 100 rastertoseikoslp

But now, how do I create the rastertoseikoslp filter?

The documentation in cupsddk-1.0/doc/cupsddk.html is not clear to me and seems to lack the oppropriate info. A hint to the info about the filter (and model filters) would be nice.

Thanks
Peer