Am 25.11.2012 um 18:11 schrieb Marco Patzer <home...@lavabit.com>:
> Hi,
>
> in one of the last few betas the MetaPost instance
> mechanism broke.
>
> \defineMPinstance
> [myinstance]
> [metafun]
>
> \startuseMPgraphic{mympgraphic}
> fill fullsquare scaled 1cm withcolor blue;
> \stopuseMPgraphic
>
> \starttext\null
> \useMPgraphic{myinstance::mympgraphic}
> \stoptext
The problem lies in the \uniqueMPgraphic and \useMPgrpahic commands. There is a
commented
line in each command which is the correct setting and the next line is wrong.
\def\meta_unique_page_graphic#1#2%
{\meta_begin_graphic_group{#1}%
\let\overlaystamp\overlaypagestamp
\setupMPvariables[\m_meta_page_prefix:\currentMPgraphicname][#2]% prefix is
new here
% \getvalue{\??mpgraphic\m_meta_page_prefix:\currentMPgraphicname}{}%
\getvalue{\??mpgraphic\m_meta_page_prefix:#1}{}%
\meta_end_graphic_group}
\def\meta_use_graphic#1#2%
{\meta_begin_graphic_group{#1}%
\doifsomething{#2}{\setupMPvariables[\currentMPgraphicname][#2]}%
%\getvalue{\??mpgraphic\currentMPgraphicname}\empty
\getvalue{\??mpgraphic#1}\empty
\meta_end_graphic_group}
Wolfgang
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