Re: overprinting

[Peter Rolf <indiego@gmx.net>]

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Hans Hagen schrieb:
> Peter Rolf wrote:
>> Hans Hagen schrieb:
>>> Peter Rolf wrote:
>>>> Hi,
>>>>
>>>> overprinting is broken here. I used \dostartoverprint in the past, 
>>>> but this no longer works. What is the recommended way for 
>>>> overprinted text nowadays?
>>>
>>> just \startoverprint Overprint \stopoverprint
>>>
>> I see. A quick test shows, that this macro is not working with mkii 
>> (an updated example is attached).
>> Sadly this macro also does not work in my graphics, if I simply 
>> exchange \dostartoverprint with \startoverprint (regardless of the 
>> mark).
>
> you need to enable it with \setupcolors[overprint=yes]
>
I tried that one before, but it enables kind of global overprinting in 
mkii (all but \startoverprinting, including the mp graphic). In case of 
mkiv this breaks the \startoverprinting macro (so no overprinting at 
all). I attached a new example.

> btw, your mkiv definitions do nothing (just toggle some flag) and the 
> \dodriverthing's are gone anyway
>
Ok, then I must find a new working overprinting macro for my texts.

> -----------------------------------------------------------------
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\setupcolors[overprint=yes]

\ifnum\contextmarkmode=4
\def\dostartoverprint% yes... one of the category 'asking for trouble' :D
  {\ctxlua{overprints.enabled=true}}
\def\dostopoverprint%
  {\ctxlua{overprints.enabled=false}}
\fi

\starttext

\startMPcode
   fill unitcircle scaled 5cm;
\stopMPcode

\starttextoverprint starttextoverprint \stoptextoverprint % fails in both marks
\dostartoverprint dostartoverprint \dostopoverprint % fails in mkiv only
\startoverprint overprint \stopoverprint % fails in mkii only

\stoptext

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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
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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