[cups] Trying to work around Canon MF743cdw driver bugs on MacOS Catalina

[Brian Demsky]

I think I figured out a solution to b&w printing….  I have a pdf based PPD file that uses the cupsColorSpace options…. That seems to work.

Brian

> On May 18, 2020, at 7:49 AM, Helge Blischke <helgeblischke at web.de> wrote:
> 
> 
> 
>> Am 18.05.2020 um 01:03 schrieb Brian <bdemsky at gmail.com>:
>> 
>> Does cups work with filters implemented as shell scripts?  My attempt at a shell script that just called canon’s print filter (passing parameters with $@) didn’t work.  I’m puzzled what this issue was.
>> 
>> Brian
>> 
> Yes, but take care of the correct command line options (job_id username title copies options [file])
> where copies is an integer, job_id an integer, options a string of job attributes (enclosed in double quotes)
> and file an optional file path (default is stdin).
> 
> But it seems that Canon’s filter in addition depends on some other parameters – at least it refused
> to work as a standalone program.
> 
> My suggestion is to replace the capdftopdl filter in the *cupsFilter statement by the homegrown
> filter which in turn calls the original filter as a post processor (getting the path name from the current PPD).
> 
> What I’m currently investigating is how to manage your request to b/w printing only.
> 
> Helge
> 
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