compression=gzip and RAW Print Queues (ipp)

[Andrew Powell]

OUTSTANDING!  That worked!

My /etc/cups/ppd/jaxshop.ppd file looks like:

*PPD-Adobe: "4.3"
*FormatVersion: "4.3"
*FileVersion: "1.4"
*LanguageVersion: English
*LanguageEncoding: ISOLatin1
*PCFileName: "generic.ppd"
*cupsFilter: "application/vnd.hp-HPGL 0 -"
*Manufacturer: "Xerox"
*Product: "(Xerox 6204)"
*ModelName: "Xerox 6204"
*ShortNickName: "Xerox 6204"
*NickName: "Xerox 6204"
*PSVersion: "(2016.0) 0"
*DefaultImageableArea: Letter
*DefaultPaperDimension: Letter
*DefaultPageSize: Letter
*DefaultPageRegion: Letter
*PageSize Letter/US Letter: "<</PageSize[612 792]/ImagingBBox 
null>>setpagedevice"
*PageRegion Letter/US Letter: "<</PageSize[612 792]/ImagingBBox 
null>>setpagedevice"
*ImageableArea Letter/US Letter: "12 12 600 780"
*PaperDimension Letter/US Letter: "612 792"

I used cupstestppd to test conformance.

On 9/30/11 8:01 AM, Helge Blischke wrote:
> Andrew Powell wrote:
>
>> Would there be a way to modify the PPD file so it would get decompressed
>> and sent to the printer without any further processing?
>>
>> If the printer was setup as a Generic Text-Only printer, what would need
>> to change in the /etc/cups/ppd/jaxshop.ppd file so no post-processing
>> would occur?  Could something like this even work?
>>
>> On 9/29/11 2:53 PM, Andy Powell wrote:
>>> How do I get CUPS to decompress compressed data for Raw printers?
>>>
>>> In the main office, I have
>>> ipp://remote.mydomain.com:631/printers/jaxshop?compression=gzip which is
>>> just a raw print queue.
>>>
>>> And in the remote office, I have socket://jaxshop.mydomain.com:9100
>>>
>>> When set to Raw, the compressed data is sent directly to the printer (it
>>> is not decompressed) and comes out as garbage.  If it is set to the
>>> printer definition, (e.g. HP LaserJet) it decompresses but this can't be
>>> done in some cases (e.g. HP/GL and Calcomp plotters).
>>>
>>> Anyone know of a fix/workaround?
>
>  From my understanding of how CUPS works, I suggest to try the following:
> Set up a PPD for the printer which - besides the "header stuff" only
> contains cupxFilter lines for all the document types the printer should
> qaccept as ras data:
>
> *cupsFilter: "text/plain 0 -"
> *cupsFilter: "application/vnd.hp-HPGL 0 -"
>
> and so on.
> CUPS then should invoke the gziptoany filter.
>
> Helge
>