From: Peter Rolf <indiego@gmx.net>
To: ntg-context@ntg.nl
Subject: Re: attachments working again (issue with /EmbeddedFiles)
Date: Sat, 8 Feb 2020 13:45:15 +0100 [thread overview]
Message-ID: <e3d60180-ad6e-2f36-689d-1a2ef83983fb@gmx.net> (raw)
In-Reply-To: <10b7abb5-70d6-e1a3-a083-1288e762ac9b@xs4all.nl>
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Am 07.02.2020 um 22:37 schrieb Hans Hagen:
> On 2/7/2020 9:55 PM, Pablo Rodriguez wrote:
>> On 2/7/20 9:19 PM, Rik Kabel wrote:
>>>
>>> On 2/7/2020 14:46, Pablo Rodriguez wrote:
>>>> many thanks for having fixed the issues with attachments (in latest
>>>> beta
>>>> from 2020.02.07 18:36). I haven’t tested attachments with PDF/A-3a.
>>>>
>>> PDF/A-3a attachments still fail validation with the same issues.
>>
>> Hi Rik,
>>
>> it has way less issues, at least using verapdf-1.5.18 and the following
>> sample:
>>
>> \setuptagging[state=start]
>>
>> \setupbodyfont[30pt]
>>
>> \setupbackend
>> [format=PDF/A-3a,
>> intent=sRGB IEC61966-2.1,
>> profile={sRGB.icc,default_gray.icc},
>> level=0]
>>
>> \setupcolors[pagecolormodel=auto]
>>
>> \setupinteraction[state=start]
>> \starttext
>> \startTEXpage[offset=1em]
>> an attachment\attachment[file=xml-mkiv.pdf,
>> type={application/pdf}]
>> \stopTEXpage
>> \stoptext
>>
>> With "method=hidden" (no attachment annotation) it has no issue.
>>
>> Both issues are related to annotations in general:
>>
>> - If the flag annotation is present (/F key), it should be set to print
>> and disable everything else.
>> - Annotations need an appearance dictionary (unless their /Rect is one
>> and the same point, or /Popup or /Link annotations).
>>
>> Actual value of the annotation flag key is "/F null". I wonder whether
>> this is a bug (for having wanted to avoid the presence of /F at all).
>>
>> Otherwise, I don’t think that setting all embedded file annotations to
>> printable is a good default.
>>
>> Just in case it helps to the discussion,
> Peter is stepwise looking into all these issues but we decided to also
> see how that checking and standards evolve in cases where it's a
> confusing mess. And these 'appearance dicts' are an example of a mess.
> On the one hand there's predefined appearances and on the other hand
> enforced renderings which gives some chicken-egg issue. It smells a lot
> like bugs became features (standards) or 'acrobat behaviour' made the
> standard or ... (like the zero rect thing, which, given t e plenty of
> flags there are and verbosity there is in pdfm is pretty weird and
> actually can make viewers bark. Irr the current approach we follow is
> kind of a compromis.
>
> Now, of course we can play safe and *always* have some fake appearance
> (we could basically choose whatever funny shape we like as over time
> people will interpret hard codes symbols for attachments differently)
> and drop support for standardized renderings (that could adapt over time).
>
> So ... no changes etc till Peter gives his blessing as he is testing all
> this in the framework we've set up for it.
>
> Hans
>
As Hans stated, we are working on it and two of the three validation
problems are already solved (needs more testing though). The only
remaining problem is this
https://github.com/veraPDF/veraPDF-validation-profiles/wiki/PDFA-Parts-2-and-3-rules#rule-633-1
I attached the current code, so you and Rik are able to test it if you
want (creating a new format is required). Best contact me off-list if
you run into new problems.
Peter
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next prev parent reply other threads:[~2020-02-08 12:45 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-02-07 19:46 Pablo Rodriguez
2020-02-07 20:19 ` Rik Kabel
2020-02-07 20:55 ` Pablo Rodriguez
2020-02-07 21:37 ` Hans Hagen
2020-02-08 8:20 ` Pablo Rodriguez
2020-02-08 12:45 ` Peter Rolf [this message]
2020-02-08 17:32 ` Pablo Rodriguez
2020-02-08 21:13 ` Rik Kabel
2020-02-12 19:20 ` Pablo Rodriguez
2020-02-12 22:22 ` Rik Kabel
2020-02-12 23:45 ` Rik Kabel
2020-02-13 8:56 ` Hans Hagen
2020-02-14 2:43 ` Rik Kabel
2020-02-14 21:23 ` Pablo Rodriguez
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