[cups] Printing CCITT and JBIG2 encoded images fails

[Helge Blischke]

> Am 27.07.2017 um 12:16 schrieb Emilio Reggi <nag at mailbox.org>:
> 
> Till, Michael,
> 
> thank you very much for your helpful suggestions.
> 
> I set up a file printing device (lpadmin ... file:/tmp/printout ...) and
> tested all renderers on it, of which each of them returned invalid
> postscript files (none of them were viewable with neither gv nor gsview).
> This phenomenon not only appeared with source files which fail to print
> on the 'real' printer, but with all source files I tested (Text only
> PDFs as well as PDFs containing JPEGs or CCITT and/or JBIG2). This is
> particularly interesting as Text-PDFs as well as JPEG-PDFs print well on
> the 'real' printer, which only returns black pages with CCITT and/or
> JBIG2 encoded sources.
> I also tried printing to the 'real' printer with different renderers
> being used (-o pdftops-renderer=), but no success.
> 
> I would assume it to be helpful to provide you with the respective
> Postscript files. However, most of them are too big to attach here
> (gs-version 49MB; pdftops-version 25MB; pdftocairo-version 10MB;
> acroread-version 652 bytes; mupdf-version 652 bytes; hybrid-version
> 41MB). If needed, I can upload these files on your preferred filehoster.
> 
> In an earlier post I wrote that printing respective files succeeded on
> Ubuntu 16.04. They also fail now under Ubuntu with the latest Canon
> driver installed UFR II/UFRII LT Printer Driver for Linux V3.40).
> 
> Emilio
> 

Emilio,

you could upload the file(s) to DropBox and send me the link to access the file(s) (maybe off the list if you have doubts).

Helge