Dohyun Kim submitted an update to the

luamplib

package.

Version: 2.29.0 2024-05-01
License: gpl2

Summary description: Use LuaTeX’s built-in MetaPost interpreter

Announcement text:
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* provide new TeX macros to reduce typing toil.

\mpfig ... \endmpfig is roughly the abbreviation of
\begin{mplibcode}[@mpfig]
beginfig(0)
token list declared by \everymplib[@mpfig]
...
token list declared by \everyendmplib[@mpfig]
endfig;
\end{mplibcode}

\mpfig* ... \endmpfig is roughly the abbreviation of
\begin{mplibcode}[@mpfig]
...
\end{mplibcode}

These macros are protected and unexpandable.
In these macros \mpliblegacybehavior{false} is forcibly declared.
As both share the same instance name, MetaPost codes are inherited among them.
The instance name (default: @mpfig) can be changed by redefining `\mpfiginstancename'.

* instance names are allowed in plain TeX as well. The syntax is:

\mplibcode[name] ... \endmplibcode
\everymplib[name]{ ... }
\everyendmplib[name]{ ... }

These macros are now protected and unexpandable.

* provide new MetaPost operators `mplibtexcolor' and `mplibrgbtexcolor'
which convert TeX color expressions to MetaPost color expressions.
The latter one forces rgb model results (#112). For instance,

mplibtexcolor "olive" % => (0, 0, 1, 0.5)
mplibrgbtexcolor "olive" % => (0.5, 0.5, 0)

As spot colors are always forced to cmyk or rgb model, it is not
recommended to use these operators for them.

* write down MetaPost messages into the log file

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The package’s Catalogue entry can be viewed at
https://ctan.org/pkg/luamplib

The package’s files themselves can be inspected at
https://mirrors.ctan.org/macros/luatex/generic/luamplib/

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Thanks for the upload.

For the CTAN Team
Petra Rübe-Pugliese

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