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%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#3#4#5#6#7% todo: move Q q to lua
{\setbox\scratchbox\hbox{\externalfigure[#7]}%
\ctxlua{metapost.edefsxsy(\number\wd\scratchbox,\number\ht\scratchbox,0)}%
\pdfliteral direct{q #1 #2 #3 #4 #5 #6 cm}% no direct
\vbox to \zeropoint{\vss\hbox to \zeropoint{\scale[sx=\sx,sy=\sy]{\box\scratchbox}\hss}}%
\pdfliteral direct{Q}}
\def\MPLIBsettext#1% #2%
{\dowithnextbox{\ctxlua{metapost.settext(\number\nextbox,#1)}}\hbox}
% \def\MPLIBgettextscaled#1#2#3% why a copy
% {\ctxlua{metapost.gettext(\number\MPtextbox,#1)}% \black has no use here (applied to box)
% \vbox to \zeropoint{\vss\hbox to \zeropoint{\black\scale[sx=#2,sy=#3]{\raise\dp\MPtextbox\box\MPtextbox}\hss}}}
\def\MPLIBgettextscaled#1#2#3% why a copy
{\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}
\protect \endinput
% \def\MPLIBsettext#1% #2% we could as well store in hlists at the lua end i.e. just one box
% {\global\setbox#1\hbox}
%
% \def\MPLIBfreetext#1%
% {\global\setbox#1\emptybox}
%
% \def\MPLIBgettextscaled#1#2#3% why a copy
% {\vbox to \zeropoint{\vss\hbox to \zeropoint{\black\scale[sx=#2,sy=#3]{\raise\dp#1\copy#1}\hss}}}
%
% \def\MPLIBallocate#1%
% {\newbox\MPLIBfirst
% \dorecurse{\numexpr#1-1\relax}{\let\MPLIBlast\relax\newbox\MPLIBlast}%
% \MPLIBregister}
%
% \def\MPLIBregister % after allocate!
% {\ctxlua{metapost.first_box, metapost.last_box = \number\MPLIBfirst, \number\MPLIBlast}}
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