* overprint and currentcolorname in mkiv
@ 2008-09-12 16:09 Peter Rolf
2008-09-12 17:17 ` Hans Hagen
0 siblings, 1 reply; 8+ messages in thread
From: Peter Rolf @ 2008-09-12 16:09 UTC (permalink / raw)
To: mailing list for ConTeXt users
Hi,
is overprinting working in mkiv?
\ctxlua{overprints.enabled=true}
has no effect here or on ConTeXt live. Maybe I'm missing something.
Currently I try to adapt some mkii code to mkiv. Overprinting should
only be enabled if
- a given maximum font size is not exceeded and
- the current text color is black.
So I also need \currentcolorname (or something similar) for that test.
[colo-new.mkiv:]
\def\currentcolorname{\s!black} % todo
This is all unhasty, but if there is a solution, let me know.
Best wishes, Peter
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^ permalink raw reply [flat|nested] 8+ messages in thread* Re: overprint and currentcolorname in mkiv
2008-09-12 16:09 overprint and currentcolorname in mkiv Peter Rolf
@ 2008-09-12 17:17 ` Hans Hagen
2008-09-14 13:27 ` Peter Rolf
0 siblings, 1 reply; 8+ messages in thread
From: Hans Hagen @ 2008-09-12 17:17 UTC (permalink / raw)
To: mailing list for ConTeXt users
Peter Rolf wrote:
> is overprinting working in mkiv?
well, i did implement it (but hardly tested it)
> \ctxlua{overprints.enabled=true}
should be enabled automatically when used, don't mess around with such
low level settings
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tel: 038 477 53 69 | fax: 038 477 53 74 | www.pragma-ade.com
| www.pragma-pod.nl
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^ permalink raw reply [flat|nested] 8+ messages in thread* Re: overprint and currentcolorname in mkiv
2008-09-12 17:17 ` Hans Hagen
@ 2008-09-14 13:27 ` Peter Rolf
2008-09-15 7:33 ` Hans Hagen
0 siblings, 1 reply; 8+ messages in thread
From: Peter Rolf @ 2008-09-14 13:27 UTC (permalink / raw)
To: mailing list for ConTeXt users
Hans Hagen schrieb:
> Peter Rolf wrote:
>
>> is overprinting working in mkiv?
>
> well, i did implement it (but hardly tested it)
>
Well, it seems that my formulation was too fuzzy (its out of question
that overprinting is implemented). Anyhow, its time to test it again.
This code fails here and at ConTeXt live (online).
\setupcolors[state=start]
\starttext
No overprinting.
\startoverprint
Overprinting is active.
\stopoverprint
\stoptext
No problems with mkii.
>> \ctxlua{overprints.enabled=true}
>
> should be enabled automatically when used, don't mess around with such
> low level settings
>
sure. was just a shortcut for testing :D
Peter
>
> -----------------------------------------------------------------
> Hans Hagen | PRAGMA ADE
> Ridderstraat 27 | 8061 GH Hasselt | The Netherlands
> tel: 038 477 53 69 | fax: 038 477 53 74 | www.pragma-ade.com
> | www.pragma-pod.nl
> -----------------------------------------------------------------
> ___________________________________________________________________________________
> If your question is of interest to others as well, please add an entry to the Wiki!
>
> maillist : ntg-context@ntg.nl / http://www.ntg.nl/mailman/listinfo/ntg-context
> webpage : http://www.pragma-ade.nl / http://tex.aanhet.net
> archive : https://foundry.supelec.fr/projects/contextrev/
> wiki : http://contextgarden.net
> ___________________________________________________________________________________
>
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^ permalink raw reply [flat|nested] 8+ messages in thread* Re: overprint and currentcolorname in mkiv
2008-09-14 13:27 ` Peter Rolf
@ 2008-09-15 7:33 ` Hans Hagen
2008-09-15 12:21 ` Peter Rolf
0 siblings, 1 reply; 8+ messages in thread
From: Hans Hagen @ 2008-09-15 7:33 UTC (permalink / raw)
To: mailing list for ConTeXt users
Peter Rolf wrote:
> Well, it seems that my formulation was too fuzzy (its out of question
> that overprinting is implemented). Anyhow, its time to test it again.
> This code fails here and at ConTeXt live (online).
>
>
> \setupcolors[state=start]
>
> \starttext
>
> No overprinting.
>
> \startoverprint
> Overprinting is active.
> \stopoverprint
>
> \stoptext
run ok here, but the question is .. what exactly do you expect to see
-----------------------------------------------------------------
Hans Hagen | PRAGMA ADE
Ridderstraat 27 | 8061 GH Hasselt | The Netherlands
tel: 038 477 53 69 | fax: 038 477 53 74 | www.pragma-ade.com
| www.pragma-pod.nl
-----------------------------------------------------------------
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___________________________________________________________________________________
^ permalink raw reply [flat|nested] 8+ messages in thread* Re: overprint and currentcolorname in mkiv
2008-09-15 7:33 ` Hans Hagen
@ 2008-09-15 12:21 ` Peter Rolf
2008-09-16 13:11 ` Hans Hagen
0 siblings, 1 reply; 8+ messages in thread
From: Peter Rolf @ 2008-09-15 12:21 UTC (permalink / raw)
To: mailing list for ConTeXt users
Hans Hagen schrieb:
> Peter Rolf wrote:
>
>> Well, it seems that my formulation was too fuzzy (its out of question
>> that overprinting is implemented). Anyhow, its time to test it again.
>> This code fails here and at ConTeXt live (online).
>>
>>
>> \setupcolors[state=start]
>>
>> \starttext
>>
>> No overprinting.
>>
>> \startoverprint
>> Overprinting is active.
>> \stopoverprint
>>
>> \stoptext
>
> run ok here, but the question is .. what exactly do you expect to see
>
to be exact: some orange text :)
Acrobat8 menu 'Advanced'-->'Print Production'-->'Output Preview...'
[Output Preview Window]
- select 'Color Warnings' entry in the 'Preview' listbox
- check the now visible 'Show Overprinting' checkbox
Now all overprinting stuff is shown in the selected color (orange).
Well, at least should...
After comparing the pdftex and the luatex pdf files, I found a
difference in the used overprinting modes. pdftex uses the 'Standard
Overprinting Mode' (OPM 0) here and luatex the 'Illustrator Overprinting
Mode' (OPM 1). This is probably the reason why the overprinting is not
shown in orange in the prior described output preview. So its no ConTeXt
related problem (overprinting attribute is set), but more a bug or at
least missing feature in Acrobat8.
I have to read more about the differences between the two modes. What I
have found out so far (no guarantee):
- 'OPM 0' overprints only on gray and spot colors (which makes it nearly
useless for my needs)
- 'OPM 1' can overprint on CMYK, but only if the RIP is capable of
Postscript Level 3. If any color channel of the overprinting color is at
0%, the overprinting is done channelwise (which means the corresponding
channel of the underlying color is visible in case of the 0% channel; so
knockout should be used here instead of overprinting)
- Also overprinting in general only works if no ICC-profile is attached
to the object
Sigh, prepress problems. Sorry for the noise!
Peter
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^ permalink raw reply [flat|nested] 8+ messages in thread
* Re: overprint and currentcolorname in mkiv
2008-09-15 12:21 ` Peter Rolf
@ 2008-09-16 13:11 ` Hans Hagen
2008-09-16 14:05 ` Peter Rolf
0 siblings, 1 reply; 8+ messages in thread
From: Hans Hagen @ 2008-09-16 13:11 UTC (permalink / raw)
To: mailing list for ConTeXt users
>>> \setupcolors[state=start]
>>>
>>> \starttext
>>>
>>> No overprinting.
>>>
>>> \startoverprint
>>> Overprinting is active.
>>> \stopoverprint
>>>
>>> \stoptext
>> run ok here, but the question is .. what exactly do you expect to see
>>
>
> to be exact: some orange text :)
can you check if the current beta is more in sync with pdftex?
-----------------------------------------------------------------
Hans Hagen | PRAGMA ADE
Ridderstraat 27 | 8061 GH Hasselt | The Netherlands
tel: 038 477 53 69 | fax: 038 477 53 74 | www.pragma-ade.com
| www.pragma-pod.nl
-----------------------------------------------------------------
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If your question is of interest to others as well, please add an entry to the Wiki!
maillist : ntg-context@ntg.nl / http://www.ntg.nl/mailman/listinfo/ntg-context
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___________________________________________________________________________________
^ permalink raw reply [flat|nested] 8+ messages in thread
* overprint and \currentcolorname in mkiv
@ 2009-03-06 14:25 Peter Rolf
0 siblings, 0 replies; 8+ messages in thread
From: Peter Rolf @ 2009-03-06 14:25 UTC (permalink / raw)
To: mailing list for ConTeXt users
Hi Hans,
the subject is re-used from an older mail
http://archive.contextgarden.net/message/20080912.160921.cb5bba9d.en.html
>> Currently I try to adapt some mkii code to mkiv. Overprinting should
>> only be enabled if
>> - a given maximum font size is not exceeded and
>> - the current text color is black.
>>
>> So I also need \currentcolorname (or something similar) for that test.
>>
>> [colo-new.mkiv:]
>> \def\currentcolorname{\s!black} % todo
You were so kind to add \doifblackelse in mkiv, but without a working
\currentcolorname it is pretty useless at the moment. I want to closure
the (inconvenient) prepress topic and overprinting is the last unsolved
problem. Any chance that this will be implemented in the near future?
Best wishes,
Peter
--
"Es ist doch ein Trost,
das Geldgier manchmal blöd macht."
- Kottan in "Kottan ermittelt", Folge 9: "Die Einteilung" -
___________________________________________________________________________________
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___________________________________________________________________________________
^ permalink raw reply [flat|nested] 8+ messages in thread
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2008-09-12 16:09 overprint and currentcolorname in mkiv Peter Rolf
2008-09-12 17:17 ` Hans Hagen
2008-09-14 13:27 ` Peter Rolf
2008-09-15 7:33 ` Hans Hagen
2008-09-15 12:21 ` Peter Rolf
2008-09-16 13:11 ` Hans Hagen
2008-09-16 14:05 ` Peter Rolf
2009-03-06 14:25 overprint and \currentcolorname " Peter Rolf
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