From: Henning Hraban Ramm <texml@fiee.net>
To: mailing list for ConTeXt users <ntg-context@ntg.nl>
Subject: Re: Transparency in PNGs becomes black in PDF/X
Date: Fri, 20 Dec 2019 12:54:32 +0100 [thread overview]
Message-ID: <5BE309D9-732C-41AB-B670-1A550D5CD7D7@fiee.net> (raw)
In-Reply-To: <8de81127-8882-a25d-f871-fdc596076222@gmx.net>
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
>>
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>
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> maillist : ntg-context@ntg.nl / http://www.ntg.nl/mailman/listinfo/ntg-context
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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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next prev parent reply other threads:[~2019-12-20 11:54 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-12-19 20:49 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 [this message]
2019-12-20 10:09 ` juh
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