Discussion:
[okular] [Bug 386408] New: Text color printed incorrectly
SP
2017-10-31 23:23:59 UTC
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https://bugs.kde.org/show_bug.cgi?id=386408

Bug ID: 386408
Summary: Text color printed incorrectly
Product: okular
Version: 1.0.0
Platform: Fedora RPMs
OS: Linux
Status: UNCONFIRMED
Severity: normal
Priority: NOR
Component: printing
Assignee: okular-***@kde.org
Reporter: ***@gmail.com
Target Milestone: ---

I am printing to a Canon Pro 9000 MkII. When I print with Okular v.1.0.3 the
text color is wrong - eg; blue is printed as green and black appears to be
grey. If I use Evince the text color prints correctly - even though I am using
KDE Plasma and not Gnome. If I use other programs such as Linux Draw - the
text colors print correctly.

Other relevant info:
KDE Frameworks 5.38.0
Qt 5.7.1 (built against 5.7.1)
CUPS+Gutenprint v5.2.12 (color)
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Albert Astals Cid
2017-11-02 21:44:54 UTC
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Albert Astals Cid <***@kde.org> changed:

What |Removed |Added
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CC| |***@kde.org
Status|UNCONFIRMED |NEEDSINFO
Resolution|--- |WAITINGFORINFO

--- Comment #1 from Albert Astals Cid <***@kde.org> ---
Does print preview show the colors correctly?
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SP
2017-11-03 04:10:25 UTC
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--- Comment #2 from SP <***@gmail.com> ---
(In reply to Albert Astals Cid from comment #1)
Post by Albert Astals Cid
Does print preview show the colors correctly?
Yes
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Simon Andric
2017-11-09 19:17:42 UTC
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Simon Andric <***@gmail.com> changed:

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CC| |***@gmail.com
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Albert Astals Cid
2017-11-11 22:46:39 UTC
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Albert Astals Cid <***@kde.org> changed:

What |Removed |Added
----------------------------------------------------------------------------
Status|NEEDSINFO |UNCONFIRMED
Resolution|WAITINGFORINFO |---

--- Comment #3 from Albert Astals Cid <***@kde.org> ---
Then honestly i'd say it's your printer problem. We can leave this open but
there's sincerely not much we can do.
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Albert Astals Cid
2017-11-12 23:05:01 UTC
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--- Comment #5 from Albert Astals Cid <***@kde.org> ---
Do i really need to explain you that even
1+1
0+2
4/2
2*1
4^(1/2)
all equal to 2 some program may be buggy and fail to calculate it correctly?
Now apply the same to printing
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SP
2017-11-12 23:26:21 UTC
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--- Comment #6 from SP <***@gmail.com> ---
@Albert Astals Cid
I am not going to get into a pissing contest here but your logic is
questionable. If the printer prints correctly with other programs but not with
one program, Okular, then there is a difference in the way those other programs
interact with the Gutenprint driver that I use with the Canon Pro 9000 MkII and
the way Okular does. So the problem is with the program and not the hardware.
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Albert Astals Cid
2017-11-12 23:49:52 UTC
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--- Comment #7 from Albert Astals Cid <***@kde.org> ---
You just did what you said you were not going to do.

Since it's clear you're smarter than me I'm waiting for your patch.
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Nate Graham
2017-11-12 22:46:27 UTC
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Nate Graham <***@zoho.com> changed:

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CC| |***@zoho.com

--- Comment #4 from Nate Graham <***@zoho.com> ---
I'm not sure it could be a problem with the printer, since the document prints
correctly in other apps (Evince and Linux Draw were mentioned).
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Christoph Feck
2017-11-15 21:34:02 UTC
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--- Comment #8 from Christoph Feck <***@kde.org> ---
Please also test 'qpdfview', which is a pure Qt program. If this reproduces the
issue, the bug would be in the way Qt interacts with the printer drivers.
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SP
2017-11-15 23:31:25 UTC
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--- Comment #9 from SP <***@gmail.com> ---
(In reply to Christoph Feck from comment #8)
Post by Christoph Feck
Please also test 'qpdfview', which is a pure Qt program. If this reproduces
the issue, the bug would be in the way Qt interacts with the printer drivers.
Thank you for your response. I tested the document again with all three pdf
programs, Okular, qpdfview and Evince. The pdf document has a dark blue title
and text in default black. With Evince this all prints as expected. With
qpdfview the colors are correct - except they are lighter - the blue appears as
a midtone and the text is dark grey. With Okular the blue appears as a green
and the text appears as a grey. So you may well be right. It could be the way
Qt is interacting with the printer drivers. I have also tested all three with
another document with a green title and body text in black. All three programs
print the title as green - with Evince rendering a dark green and black body
text, qpdfview as the same but lighter and Okular as much lighter overall. I
also notice that when I check the Options in Okular it is set to Greyscale by
default - which I change to colour before I print. In the other programs
Colour is set as a default.
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Michael Weghorn
2017-12-16 15:39:46 UTC
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Michael Weghorn <***@posteo.de> changed:

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CC| |***@posteo.de

--- Comment #10 from Michael Weghorn <***@posteo.de> ---
(In reply to SP from comment #9)
[...] I
have also tested all three with another document with a green title and body
text in black. All three programs print the title as green - with Evince
rendering a dark green and black body text, qpdfview as the same but lighter
and Okular as much lighter overall. [...]
Can you possibly attach any of the documents with which the problems occurs for
you?
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Christoph Feck
2018-01-02 20:13:33 UTC
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--- Comment #11 from Christoph Feck <***@kde.org> ---
If you can provide the information requested in comment #10, please add it.
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Christoph Feck
2018-01-17 23:44:44 UTC
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Christoph Feck <***@kde.org> changed:

What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEEDSINFO
Resolution|--- |WAITINGFORINFO

--- Comment #12 from Christoph Feck <***@kde.org> ---
To further investigate this issue, KDE developers need the information
requested in comment #10. If you can provide it, or need help with finding that
information, please add a comment.
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Andrew Crouthamel
2018-09-28 03:40:46 UTC
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Andrew Crouthamel <***@kdemail.net> changed:

What |Removed |Added
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Keywords| |triaged

--- Comment #13 from Andrew Crouthamel <***@kdemail.net> ---
Dear Bug Submitter,

This bug has been in NEEDSINFO status with no change for at least 15 days.
Please provide the requested information as soon as possible and set the bug
status as REPORTED. Due to regular bug tracker maintenance, if the bug is still
in NEEDSINFO status with no change in 30 days, the bug will be closed as
RESOLVED > WORKSFORME due to lack of needed information.

For more information about our bug triaging procedures please read the wiki
located here: https://community.kde.org/Guidelines_and_HOWTOs/Bug_triaging

If you have already provided the requested information, please set the bug
status as REPORTED so that the KDE team knows that the bug is ready to be
confirmed.

Thank you for helping us make KDE software even better for everyone!
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Andrew Crouthamel
2018-10-29 02:14:02 UTC
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Andrew Crouthamel <***@kdemail.net> changed:

What |Removed |Added
----------------------------------------------------------------------------
Resolution|WAITINGFORINFO |WORKSFORME
Status|NEEDSINFO |RESOLVED

--- Comment #14 from Andrew Crouthamel <***@kdemail.net> ---
Dear Bug Submitter,

This bug has been in NEEDSINFO status with no change for at least 30 days. The
bug is now closed as RESOLVED > WORKSFORME due to lack of needed information.

For more information about our bug triaging procedures please read the wiki
located here: https://community.kde.org/Guidelines_and_HOWTOs/Bug_triaging

Thank you for helping us make KDE software even better for everyone!
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