[cups] turning off fit-to-page

[Douglas Kosovic]

On 26/1/24 1:30 am, Gary Dale wrote:
> On 2024-01-22 10:51, Douglas Kosovic wrote:
>> I suspect the old "-o fit-to-page=off" option has been superseded by 
>> the "-o print-scaling=none" standard IPP Everywhere option.
>>
>> Extract from https://github.com/OpenPrinting/cups-filters/issues/108 :
>>
>> "none: do not scale the document to fit the requested media size. If 
>> the document is larger than the requested media, center and clip the 
>> resulting output. If the document is smaller than the requested 
>> media, center the resulting output."
>>
>> There is more discussion about the "-o print-scaling=none" option 
>> here with JPEG images:
>> https://github.com/OpenPrinting/cups-filters/issues/362
>>
> Thanks Doug. That seems to work. It looks like the option could take a 
> variety of useful parameters, but a look at the IPP everywhere 
> protocol seems to dash that hope. It would be nice if the developers 
> would document how lp currently works...

The following Debian page has great documentation on image manipulation with cups-filters including the evolution of the -o crop-to-fit and -o print-scaling=none options for various versions of cups-filters:
https://wiki.debian.org/CUPSImageManipulation

An interesting piece of information from that page that I suspect is applicable to Gwenview (which I believe is a KDE application that uses QtPrintDialog that uses PPD attributes and hasn't been updated to query and use IPP attributes), is that the print-scaling options will appear in an application's print dialog if the PPD file was generated by the cups-filters driverless PPD generator (and not by the CUPS IPP Everywhere PPD generator, nor with older PPD files).

The following print-scaling lines were taken from a PPD file generated by the cups-filters driverless PPD generator. You could try adding them to the end of a PPD file (e.g. /etc./cups/ppd/queue-name.ppd ) and then restarting cups for the change to take effect.

*OpenUI *print-scaling/Print Scaling: PickOne
*OrderDependency: 10 AnySetup *print-scaling
*Defaultprint-scaling: auto
*print-scaling auto/Automatic: ""
*print-scaling auto-fit/Auto-fit: ""
*print-scaling fill/Fill: ""
*print-scaling fit/Fit: ""
*print-scaling none/None: ""
*CloseUI: *print-scaling


I don't have a working KDE desktop environment at the moment to confirm if PPD modifications work with Gwenview.



Cheers,
Doug