[cups] Print job inverts colours halfway
Helge Blischke
helgeblischke at web.de
Tue Aug 11 07:15:13 PDT 2015
Well, then …
Please execute
cupsfilter -p /etc/cups/ppd/Canon-MF4700-OCB1.ppd -m application/pdf /usr/share/cups/data/testprint > testbanner.pdf
and send me that PDF to
helgeblischke at web dot de
so that I can have a look into it.
Helge
> Am 11.08.2015 um 15:38 schrieb Emmanuel Noobadmin <centos.admin at gmail.com>:
>
> On 8/11/15, Helge Blischke <helgeblischke at web.de> wrote:
>> Doeds printing the testpage *really* invert the colors halfway?
>
> Yes, at approximately 14.4cm from the top border of the default test
> page, I get a solid swath of black background with text for the basic
> info (Media Limits, Job ID etc) in white. At first I thought maybe
> this was a new (and very toner wasteful) style until we tried to print
> an actual document and got the same inverted white text on black
> background problem.
>
>> In your first post you told from documents with images from LibreOffice
>> showing the issue.
>
> It was for testing in case it was specific to the test page or the
> document we were printing.
>
>> To make clear what my suspicion is:
>> I know from many JPEG images that they internally use an inverted notation
>> of colors, and I suspect
>> that when converting these data to PostScript, this inverting has not been
>> confined to the image data
>> but erroneously extended to the subsequent data.
>
> If it helps eliminate this possibility, we used a .PNG image for testing.
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