meta-pdf.mkiv / last modification: 2020-01-30 14:16
%D \module
%D   [       file=meta-pdf,
%D        version=2006.06.07,
%D          title=\METAPOST\ Graphics,
%D       subtitle=Conversion to \PDF,
%D         author=Hans Hagen \& others (see text),
%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.

\registerctxluafile{meta-pdf}{}

\writestatus{loading}{MetaPost Graphics / MPS to PDF}

\unprotect

%D \macros
%D   {convertMPtoPDF}
%D
%D The next set of macros implements \METAPOST\ to \PDF\ conversion. The
%D traditional method is in the MkII files and the older \MKIV\ method is
%D kept in meta-pdh files. The main conversion command is still the same
%D but the scale parameters are ignored in \MKIV:
%D
%D \starttyping
%D \convertMPtoPDF {filename} {x scale} {y scale}
%D \stoptyping
%D
%D Much code has gone due to the fact that we now use pre and post scripts
%D and no specials. This also means that you should use a modern \METAPOST\
%D or reprocess graphics. The color control flags are also gone as we now
%D integrate into the regular colorspace handling (i.e.\ no longer independent
%D configurations.)

\def\PDFMPformoffset{\ifdefined\objectoffset\objectoffset\else\zeropoint\fi} % obsolete, will go

\unexpanded\def\convertMPtoPDF#1#2#3% scaling no longer supported at this level (so #2 & #3 are ignored)
  {\dostarttagged\t!mpgraphic\empty
   \naturalvpack attr \imageattribute 1 \bgroup
     \message{[MP to PDF]}%
     \xdef\MPfilename{#1}%
     \resetMPboundingbox
     \forgetall
     \offinterlineskip
     \setbox\MPbox\vpack\bgroup
       \clf_convertmpstopdf{\MPfilename}%
       \removeunwantedspaces % not that needed
     \egroup
     \finalizeMPbox
     \box\MPbox
   \egroup
   \dostoptagged}

\protect \endinput

%D Test code:
%D
%D \startbuffer
%D \startMPcode
%D     fill fullcircle scaled 3cm withcolor red ;
%D     fill fullcircle scaled 2cm withcolor green ;
%D     fill fullcircle scaled 1cm withcolor blue ;
%D     currentpicture := currentpicture shifted (-4cm,0) ;
%D     fill fullcircle scaled 3cm withcolor cmyk(0,0,1,0) ;
%D     fill fullcircle scaled 2cm withcolor cmyk(0,1,0,0) ;
%D     fill fullcircle scaled 1cm withcolor cmyk(0,0,1,0) ;
%D     currentpicture := currentpicture shifted (-4cm,0) ;
%D     draw fullcircle scaled 3cm dashed evenly ;
%D     draw fullcircle scaled 2cm dashed withdots  ;
%D     draw origin withpen pencircle scaled 3mm;
%D     currentpicture := currentpicture shifted (-4cm,0) ;
%D     fill fullcircle scaled 2cm shifted (-.5cm,+.5cm) withcolor transparent(1,.5,red);
%D     fill fullcircle scaled 2cm shifted (-.5cm,-.5cm) withcolor transparent(1,.5,red);
%D     fill fullcircle scaled 2cm shifted (+.5cm,+.5cm) withcolor transparent(1,.5,green);
%D     fill fullcircle scaled 2cm shifted (+.5cm,-.5cm) withcolor transparent(1,.5,cmyk(1,0,1,.5));
%D     currentpicture := currentpicture shifted (12cm,-4cm) ;
%D     draw "o e p s" infont defaultfont scaled 2 shifted (-1cm,0) ;
%D     currentpicture := currentpicture shifted (-4cm,0) ;
%D     % bug: shift
%D     draw fullcircle scaled 3cm withpen pencircle yscaled 3mm xscaled 2mm rotated 30  ;
%D     draw fullcircle scaled 2cm withpen pencircle yscaled 3mm xscaled 2mm rotated 20 withcolor red ;
%D     filldraw fullcircle scaled 1cm withpen pencircle yscaled 3mm xscaled 2mm rotated 10 withcolor green ;
%D     currentpicture := currentpicture shifted (-4cm,0) ;
%D     % shade cannot handle shift
%D     circular_shade(fullcircle scaled 3cm,0,.2red,.9green) ;
%D     circular_shade(fullcircle scaled 3cm shifted(+4cm,0),0,cmyk(1,0,0,0),cmyk(0,1,0,0)) ;
%D     filldraw boundingbox currentpicture enlarged -3cm withpen pencircle scaled 1pt withcolor .5white ;
%D \stopMPcode
%D \stopbuffer
%D
%D \typebuffer \startlinecorrection \getbuffer \stoplinecorrection