* Transparency in PNGs becomes black in PDF/X
@ 2019-12-19 20:49 Henning Hraban Ramm
2019-12-20 10:00 ` Peter Rolf
2019-12-20 10:09 ` juh
0 siblings, 2 replies; 5+ messages in thread
From: Henning Hraban Ramm @ 2019-12-19 20:49 UTC (permalink / raw)
To: mailing list for ConTeXt users
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I think this is the same problem that I had in Bassenge:
The transparent part of PNGs like the attached one becomes black if I try to make an PDF/X.
I hope that is solvable...
\setupbackend[format=PDF/X-1a:2001]
\starttext
\externalfigure[kinder/esel_kl]
\stoptext
Best, Hraban
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* Re: Transparency in PNGs becomes black in PDF/X
2019-12-19 20:49 Transparency in PNGs becomes black in PDF/X Henning Hraban Ramm
@ 2019-12-20 10:00 ` Peter Rolf
2019-12-20 10:09 ` luigi scarso
2019-12-20 11:54 ` Henning Hraban Ramm
2019-12-20 10:09 ` juh
1 sibling, 2 replies; 5+ messages in thread
From: Peter Rolf @ 2019-12-20 10:00 UTC (permalink / raw)
To: ntg-context
Hi Hraban,
PDF/X-1a:2001 doesn't support transparency. You have to use PDF/X-4(p)
for that (the first X variant that supports transparency).
PDF/A-2|3 may also be an option. These formats also support transparency.
Peter
Am 19.12.2019 um 21:49 schrieb Henning Hraban Ramm:
> I think this is the same problem that I had in Bassenge:
> The transparent part of PNGs like the attached one becomes black if I
> try to make an PDF/X.
>
> I hope that is solvable...
>
> \setupbackend[format=PDF/X-1a:2001]
>
> \starttext
> \externalfigure[kinder/esel_kl]
> \stoptext
>
>
> Best, Hraban
>
> ___________________________________________________________________________________
> 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://context.aanhet.net
> archive : https://bitbucket.org/phg/context-mirror/commits/
> wiki : http://contextgarden.net
> ___________________________________________________________________________________
>
___________________________________________________________________________________
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* Re: Transparency in PNGs becomes black in PDF/X
2019-12-20 10:00 ` Peter Rolf
@ 2019-12-20 10:09 ` luigi scarso
2019-12-20 11:54 ` Henning Hraban Ramm
1 sibling, 0 replies; 5+ messages in thread
From: luigi scarso @ 2019-12-20 10:09 UTC (permalink / raw)
To: mailing list for ConTeXt users
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On Fri, Dec 20, 2019 at 11:00 AM Peter Rolf <indiego@gmx.net> wrote:
> Hi Hraban,
>
> PDF/X-1a:2001 doesn't support transparency. You have to use PDF/X-4(p)
> for that (the first X variant that supports transparency).
> PDF/A-2|3 may also be an option. These formats also support transparency.
>
>
> Peter
>
>
confirmed, this is ok.
\setupbackend[format=PDF/X-4p]
\starttext
\externalfigure[esel_kl.png]
\stoptext
>
--
luigi
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* Re: Transparency in PNGs becomes black in PDF/X
2019-12-20 10:00 ` Peter Rolf
2019-12-20 10:09 ` luigi scarso
@ 2019-12-20 11:54 ` Henning Hraban Ramm
1 sibling, 0 replies; 5+ messages in thread
From: Henning Hraban Ramm @ 2019-12-20 11:54 UTC (permalink / raw)
To: mailing list for ConTeXt users
But that’s no reason to paint it black!
I don’t think an alpha channel of a picture would need real PDF transparency.
InDesign & Co will flatten transparencies and create or combine pictures as necessary.
I can’t expect ConTeXt to do that. But I see no reason to convert the alpha channel that way.
Ok, time to update my setups.
Hraban
> Am 2019-12-20 um 11:00 schrieb Peter Rolf <indiego@gmx.net>:
>
> Hi Hraban,
>
> PDF/X-1a:2001 doesn't support transparency. You have to use PDF/X-4(p)
> for that (the first X variant that supports transparency).
> PDF/A-2|3 may also be an option. These formats also support transparency.
>
>
> Peter
>
>
> Am 19.12.2019 um 21:49 schrieb Henning Hraban Ramm:
>> I think this is the same problem that I had in Bassenge:
>> The transparent part of PNGs like the attached one becomes black if I
>> try to make an PDF/X.
>>
>> I hope that is solvable...
>>
>> \setupbackend[format=PDF/X-1a:2001]
>>
>> \starttext
>> \externalfigure[kinder/esel_kl]
>> \stoptext
>>
>>
>> Best, Hraban
>>
>> ___________________________________________________________________________________
>> 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://context.aanhet.net
>> archive : https://bitbucket.org/phg/context-mirror/commits/
>> wiki : http://contextgarden.net
>> ___________________________________________________________________________________
>>
>
> ___________________________________________________________________________________
> 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://context.aanhet.net
> archive : https://bitbucket.org/phg/context-mirror/commits/
> wiki : http://contextgarden.net
> ___________________________________________________________________________________
___________________________________________________________________________________
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://context.aanhet.net
archive : https://bitbucket.org/phg/context-mirror/commits/
wiki : http://contextgarden.net
___________________________________________________________________________________
^ permalink raw reply [flat|nested] 5+ messages in thread
* Re: Transparency in PNGs becomes black in PDF/X
2019-12-19 20:49 Transparency in PNGs becomes black in PDF/X Henning Hraban Ramm
2019-12-20 10:00 ` Peter Rolf
@ 2019-12-20 10:09 ` juh
1 sibling, 0 replies; 5+ messages in thread
From: juh @ 2019-12-20 10:09 UTC (permalink / raw)
To: mailing list for ConTeXt users
Henning Hraban Ramm writes:
> I think this is the same problem that I had in Bassenge:
> The transparent part of PNGs like the attached one becomes black if I try to make an PDF/X.
>
> I hope that is solvable...
>
> \setupbackend[format=PDF/X-1a:2001]
AFAIK PDF/X-1a:2001 does not support transparency.
Mit freundlichen Grüßen
Jan Ulrich Hasecke
--
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Essay zum 30. Todestag von Joseph Beuys
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Taschenbuch, 130 Seiten, EUR 9,90
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2019-12-19 20:49 Transparency in PNGs becomes black in PDF/X Henning Hraban Ramm
2019-12-20 10:00 ` Peter Rolf
2019-12-20 10:09 ` luigi scarso
2019-12-20 11:54 ` Henning Hraban Ramm
2019-12-20 10:09 ` juh
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