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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.
% todo: figure out why this is shifted
%
% \setupbodyfont[palatino]
%
% \starttext
% \startMPpage
% draw textext("123") ;
% \stopMPpage
% \stoptext
%
% A slightly larger picture works ok so maybe there is some kind
% of interference with the page builder.
\newbox \MPtextbox
\newtoks\everyMPLIBsettext % not used
\def\doMPLIBflushenvironment
{%\writestatus\m!metapost{flushing environment}%
\clf_mptexget
\let\MPLIBflushenvironment\relax}% MPenvironments are depricated}
\let\MPLIBflushenvironment\doMPLIBflushenvironment
\unexpanded\def\MPLIBsetNtext#1% #2% box text
{\MPLIBflushenvironment
\dowithnextbox{\clf_mpsettext\nextbox #1}\hbox\bgroup % text
\meta_set_current_color
\let\MPLIBflushenvironment\doMPLIBflushenvironment
\let\next} % gobble open brace
\unexpanded\def\MPLIBsetCtext#1#2% #3% box colorspec text
{\MPLIBflushenvironment
\dowithnextbox{\clf_mpsettext\nextbox #1}\hbox\bgroup % text
\directcolored[#2]%
\meta_set_current_color % so, textcolor wins !
\let\MPLIBflushenvironment\doMPLIBflushenvironment
\let\next} % gobble open brace
\let\MPLIBsettext\MPLIBsetNtext
\unexpanded\def\MPLIBgettextscaled#1#2#3% why a copy .. can be used more often
{\clf_mpgettext\MPtextbox #1%
\vpack to \zeropoint{\vss\hpack to \zeropoint{\scale[\c!sx=#2,\c!sy=#3]{\raise\dp\MPtextbox\box\MPtextbox}\forcecolorhack\hss}}}
\unexpanded\def\MPLIBfigure#1#2%
{\setbox\scratchbox\hpack{\externalfigure[#1][\c!mask=#2]}%
\clf_mpsetsxsy\wd\scratchbox\ht\scratchbox\zeropoint
\vpack to \zeropoint{\vss\hpack to \zeropoint{\scale[\c!sx=\sx,\c!sy=\sy]{\box\scratchbox}\hss}}}
% horrible (we could inline scale and matrix code):
\unexpanded\def\MPLIBgettextscaledcm#1#2#3#4#5#6#7#8#9% 2-7: sx,rx,ry,sy,tx,ty
{\clf_mpgettext\MPtextbox #1%
\setbox\MPbox\hpack\bgroup
\dotransformnextbox{#2}{#3}{#4}{#5}{#6}{#7}% does push pop ... will be changed to proper lua call (avoid small numbers)
\vpack to \zeropoint\bgroup
\vss
\hpack to \zeropoint \bgroup
% \scale[\c!sx=#8,\c!sy=#9]{\raise\dp\MPtextbox\box\MPtextbox}%
% \scale[\c!sx=#8,\c!sy=#9,\c!depth=\v!no]{\box\MPtextbox}%
\fastsxsy{#8}{#9}{\raise\dp\MPtextbox\box\MPtextbox}%
% This gives: LuaTeX warning: Misplaced \pdfrestore .. don't ask me why.
% but I'll retry it some day soon.
% \dostartscaling{#8}{#9}%
% \raise\dp\MPtextbox\box\MPtextbox
% \dostopscaling
\forcecolorhack % can go away ... already in the scale macro
\hss
\egroup
\egroup
\egroup
\smashbox\MPbox
\box\MPbox}
\unexpanded\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
\unexpanded\def\MPLIBpositionwhd#1#2#3#4#5% bp !
{\dosavepositionwhd{#1}\zerocount{#2\onebasepoint}{#3\onebasepoint}{#4\onebasepoint}{#5\onebasepoint}\zeropoint}
% \def\MPLIBextrapass#1%
% {\ctxlua{metapost.graphic_extra_pass("#1")}}
%D Experiment
\def\doMPLIBstopgroup#1#2#3#4#5#6% some day this might happen elsewhere
{\egroup
\setbox\scratchbox\hpack{\kern\onebasepoint\box\scratchbox}% weird correction
\wd\scratchbox \dimexpr#5\onebasepoint-#3\onebasepoint+2\onebasepoint\relax
\ht\scratchbox #6\onebasepoint
\dp\scratchbox-#4\onebasepoint
\saveboxresource
attr {/Group << /S /Transparency /I \ifnum#1=1 true \else false \fi /K \ifnum#1=1 true \else false \fi >>}
resources {\pdfbackendcurrentresources}
\scratchbox
% \setbox\scratchbox\hbox\bgroup\kern-\onebasepoint\useboxresource\lastsavedboxresourceindex\egroup % why twice?
\setbox\scratchbox\hpack\bgroup\kern-\onebasepoint\useboxresource\lastsavedboxresourceindex\egroup
\wd\scratchbox\zeropoint
\ht\scratchbox\zeropoint
\dp\scratchbox\zeropoint
\box\scratchbox
\endgroup}
\unexpanded\def\MPLIBstartgroup#1#2#3#4#5#6% isolated 0/1, knockout 0/1 llx lly urx ury
{\begingroup
\setbox\scratchbox\hpack\bgroup
\unexpanded\def\MPLIBstopgroup{\doMPLIBstopgroup{#1}{#2}{#3}{#4}{#5}{#6}}}
\protect \endinput
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