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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 ADE \& \CONTEXT\ Development Team}]
%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.
% TODO: foigure out why this is shifted
%
% \setupbodyfont[palatino]
%
% \starttext
% \startMPpage
% draw textext("123") ;
% \stopMPpage
% \stoptext
%
% A slightly larger picturew works ok. Some kind of interference
% with the OTR.
\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)}%
\vbox to \zeropoint{\vss\hbox to \zeropoint{\scale[\c!sx=#2,\c!sy=#3]{\raise\dp\MPtextbox\box\MPtextbox}\forcecolorhack\hss}}}
% horrible:
\def\MPLIBgettextscaledcm#1#2#3#4#5#6#7#8#9% 2-7: sx,rx,ry,sy,tx,ty
{\ctxlua{metapost.gettext(\number\MPtextbox,#1)}%
\setbox\MPbox\hbox\bgroup
\dotransformnextbox{#2}{#3}{#4}{#5}{#6}{#7}% does push pop
\vbox to \zeropoint\bgroup
\vss
\hbox to \zeropoint \bgroup
% \scale[\c!sx=#8,\c!sy=#9]{\raise\dp\MPtextbox\box\MPtextbox}\forcecolorhack
\dostartscaling{#8}{#9}%
\raise\dp\MPtextbox\box\MPtextbox
\dostopscaling
\hss
\egroup
\egroup
\egroup
\smashbox\MPbox
\box\MPbox}
\def\MPLIBgraphictext#1% use at mp end
{\startTEXpage[\c!scale=10000]#1\stopTEXpage}
%D \startbuffer
%D \definelayer[test]
%D
%D \setlayerframed
%D [test]
%D [x=\MPx{somepos-1},y=\MPy{somepos-1}]
%D [width=\MPw{somepos-1},height=\MPh{somepos-1}]
%D {Whatever we want here!}
%D
%D \setlayerframed
%D [test]
%D [x=\MPx{somepos-2},y=\MPy{somepos-2}]
%D [width=\MPw{somepos-2},height=\MPh{somepos-2}]
%D {Whatever we need there!}
%D
%D \startuseMPgraphic{oeps}
%D draw fullcircle scaled 6cm withcolor red ;
%D register ("somepos-1",5cm,1cm,center currentpicture) ;
%D register ("somepos-2",4cm,3cm,(-1cm,-2cm)) ;
%D \stopuseMPgraphic
%D
%D \framed[background=test,offset=overlay]{\useMPgraphic{oeps}}
%D \stopbuffer
%D
%D \typebuffer \startlinecorrection \getbuffer \stoplinecorrection
\def\MPLIBpositionwhd#1#2#3#4#5% bp !
{\dosavepositionwhd{#1}{0}{#2bp}{#3bp}{#4bp}{#5bp}{0bp}}
\def\MPLIBextrapass#1%
{\ctxlua{metapost.graphic_extra_pass("#1")}}
\def\MPLIBresettexts
{\ctxlua{metapost.resettextexts()}}
\protect \endinput
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