On 2/17/2021 12:18 AM, Jairo A. del Rio wrote:
> I've copied the following example from the ConTeXt archive:
>
> \defineoverlay[frames][\positionoverlay{frames}]
>
> \setupbackgrounds[text][background=frames]
>
>
> \startMPpositiongraphic{frame}
>
> if unknown context_apos : input mp-apos.mpiv ; fi ;
>
> \MPgetposboxes{\MPvar{self}}{\MPanchorid}
>
> if nofposboxes = 1 :
>
> draw posboxes[1] ;
>
> fi ;
>
> \stopMPpositiongraphic
>
>
> \startpositionoverlay{frames}
>
> \setMPpositiongraphic{one}{frame}
>
> \setMPpositiongraphic{two}{frame}
>
> \stoppositionoverlay
>
>
> \starttext
>
> This \hpos{one}{word} should be \hpos{two}{framed}.
>
> \stoptext
>
> Frames are misplaced, so I don't know if that's a bug or something else
> has been updated/changed/deprecated. Thank you in advance.
As a step-up to further integrated (more lmtx-ish) support for this the
next upload will have this:

\defineoverlay[frames][\positionoverlay{frames}]

\setupbackgrounds[text][background=frames]

\startMPpositiongraphic{frame}
     getposboxes("self","anchor") ;
     if nofposboxes = 1 :
         draw posboxes[1] ;
     fi ;
\stopMPpositiongraphic

\startpositionoverlay{frames}
     \setMPpositiongraphic{one}{frame}
     \setMPpositiongraphic{two}{frame}
\stoppositionoverlay

\starttext
     This \hpos{one}{\strut word} should \hpos{two}{\strut also be framed}.
\stoptext

Hans


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