[cups] Epson WF-6090: Varying line thickness on prints with horizontal lines

[David Rea]

Thank you all for the suggestions...

I was able to build "rasterview" on Ubutnu, but I haven't tracked down a
bash stdin redirect script yet that produces anything more than a 0-byte
file when substituted for epson-escpr-wrapper.

Johannes, do you have a known-good script at hand?

Many Thanks,
Dave

On Mon, Jun 18, 2018 at 8:25 AM, Johannes Meixner <jsmeix at suse.de> wrote:

>
> Hello,
>
> On Jun 18 06:24 David Rea wrote (excerpt):
>
>> Something appears to be resampling the PDF,
>> possibly during rasterization?
>>
>
> Yes that hapens and it is possible that this is the root cause.
>
> On my  openSUSE Leap 42.3 system I see that
> all PPDs of Epson's epson-inkjet-printer-escpr contain
> -----------------------------------------------------------------
> *cupsFilter: "application/vnd.cups-raster 0 epson-escpr-wrapper"
> -----------------------------------------------------------------
> where epson-escpr-wrapper is Epson's actual driver program
> /usr/lib/cups/filter/epson-escpr-wrapper
> that gets data of type "application/vnd.cups-raster" as input
> and outputs raster data that matches the printer model,
> cf. the sections "The Filter (includes the Driver)"
> and "The Backends" in
> https://en.opensuse.org/SDB:CUPS_in_a_Nutshell
>
> To find out whether or not the root cause is Epson's
> /usr/lib/cups/filter/epson-escpr-wrapper
> or if it is already in its "vnd.cups-raster" data input
> you need to get that "vnd.cups-raster" data input
> and display it with the "rasterview" program.
>
> I am not a Ubuntu user so that I cannot tell you
> how to get the "rasterview" program for Ubuntu.
>
> The a bit tricky part is how to get the "vnd.cups-raster"
> data input of /usr/lib/cups/filter/epson-escpr-wrapper.
>
> My personal way is to move the original
> /usr/lib/cups/filter/epson-escpr-wrapper
> away and create a bash script with the same name
> which only outputs its stdin input to a regular file.
>
> Then I can display that file with "rasterview".
>
>
>
> Kind Regards
> Johannes Meixner
> --
> SUSE LINUX GmbH - GF: Felix Imendoerffer, Jane Smithard,
> Graham Norton - HRB 21284 (AG Nuernberg)
>
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