%D \module
%D   [       file=mlib-pps,
%D        version=2008.03.25,
%D          title=\METAPOST\ Integrated Graphics,
%D       subtitle=Basics,
%D         author=Hans Hagen,
%D           date=\currentdate,
%D      copyright=PRAGMA]
%C
%C This module is part of the \CONTEXT\ macro||package and is
%C therefore copyrighted by \PRAGMA. See mreadme.pdf for
%C details.

\unprotect

\registerctxluafile{mlib-pps}{1.001}

%D Todo: catch nested graphics like external figures with dummies.

% \newtoks\everyMPLIBtext % not yet used

% \appendtoks
%     \let\handleuseMPgraphic     \thirdofthreearguments
%     \let\handlereusableMPgraphic\thirdofthreearguments
% \to \everyMPLIBtext

% this will move !

% Instead of preallocated boxes we now use a table of lists so that we
% have no limitation. Typically an example of a next version solution
% due to \LUATEX\ evolving.

\newbox \MPtextbox
\newtoks\everyMPLIBsettext

\def\MPLIBfigure#1#2%
  {\setbox\scratchbox\hbox{\externalfigure[#1][\c!mask=#2]}%
   \ctxlua{metapost.edefsxsy(\number\wd\scratchbox,\number\ht\scratchbox,0)}%
   \vbox to \zeropoint{\vss\hbox to \zeropoint{\scale[\c!sx=\sx,\c!sy=\sy]{\box\scratchbox}\hss}}}

\def\MPLIBsettext#1% #2%
  {\dowithnextbox{\ctxlua{metapost.settext(\number\nextbox,#1)}}\hbox}

\def\MPLIBgettextscaled#1#2#3%  why a copy .. can be used more often
  {\ctxlua{metapost.gettext(\number\MPtextbox,#1)}% we need the colorhack or else the color backend does not sync
   \vbox to \zeropoint{\vss\hbox to \zeropoint{\scale[\c!sx=#2,\c!sy=#3]{\raise\dp\MPtextbox\box\MPtextbox}\forcecolorhack\hss}}}

\def\MPLIBgraphictext#1%
  {\startTEXpage[\c!scale=10000]#1\stopTEXpage}

\def\MPLIBpositionwhd#1#2#3#4#5%
  {\dosavepositionwhd{#1}{0}{#2sp}{#3sp}{#4sp}{#5sp}{0sp}}

\def\MPLIBextrapass#1%
  {\ctxlua{metapost.graphic_extra_pass(#1)}}

\def\MPLIBresettexts
  {\ctxlua{metapost.resettextexts()}}

\protect \endinput