[luatex] luatex doesn't set /Smask in pdf 2.0

[Frank Mittelbach]

  Luigi

> 
> On Wed, Jun 30, 2021 at 6:12 PM Frank Mittelbach 
> <frank.mittelbach at latex-project.org 
> <mailto:frank.mittelbach at latex-project.org>> wrote:
> 
> 
>     that mean never then. It is an iso standard and iso standards are to be
>     paid for. 1.7 was an exception as that was published as a draft still
>     under the Adobe flag. Maybe that needs then some sponsor so that at
>     least one copy could be bought for you, say.
> 
> 
> 
> https://standards.iso.org/ittf/PubliclyAvailableStandards/index.html 
> <https://standards.iso.org/ittf/PubliclyAvailableStandards/index.html>

those are only a small subset, the pdf standard is not among them, is 
it? So, yes I should have said *most* iso  standards are to be paid for.

It is here:

https://www.iso.org/standard/75839.html

and it is more expensive than I remembered, somewhat in the ball park of 
$250 per copy, but still I think the community should be able to afford 
that, if that is what it takes.

We do have a good chance to outrun a lot of the commercial applications 
when producing PDF from TeX (or rather luatex) but it is a little 
hampered if one has looses, e.g., transparency in graphics, if one sets 
the pdf version to 2

frank