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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}
\def\MPLIBcircularshade#1#2#3#4#5#6#7% nr domain color-a color-b ? colorspace oordinates
{\immediate\pdfobj{<</FunctionType 2 /Domain [#2] /C0 [#3] /C1 [#4] /N #5>>}%
\immediate\pdfobj{<</ShadingType 3 /ColorSpace /#6 /Function \the\pdflastobj\space 0 R /Coords [#7] /Extend [true true]>>}%
\appendtoPDFdocumentshades{/MpSh#1 \the\pdflastobj\space0 R }}
\def\MPLIBlinearshade#1#2#3#4#5#6#7% nr domain color-a color-b ? colorspace oordinates
{\immediate\pdfobj{<</FunctionType 2 /Domain [#2] /C0 [#3] /C1 [#4] /N #5>>}%
\immediate\pdfobj{<</ShadingType 2 /ColorSpace /#6 /Function \the\pdflastobj\space 0 R /Coords [#7] /Extend [true true]>>}%
\appendtoPDFdocumentshades{/MpSh#1 \the\pdflastobj\space0 R }}
\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%
{\global\setbox#1\hbox}% {#2}}
% \def\MPLIBgettext#1#2#3#4#5#6#7% we can also use this for the figure and pass sx/sy
% {\ctxlua{metapost.edefsxsy(\number\wd#7,\number\ht#7,\number\dp#7)}%
% \pdfliteral{q #1 #2 #3 #4 #5 #6 cm}%
% \vbox to \zeropoint{\vss\hbox to \zeropoint{\scale[sx=\sx,sy=\sy]{\raise\dp#7\box#7}\hss}}%
% \pdfliteral{Q}}
\def\MPLIBgettextscaled#1#2#3%
{\vbox to \zeropoint{\vss\hbox to \zeropoint{\scale[sx=#2,sy=#3]{\raise\dp#1\box#1}\hss}}}
\def\MPLIBallocate#1%
{\newbox\MPLIBfirst
\dorecurse{\numexpr#1-1\relax}{\newbox\MPLIBlast}%
\MPLIBregister}
\def\MPLIBregister
{\ctxlua{metapost.first_box, metapost.last_box = \number\MPLIBfirst, \number\MPLIBlast}}
\appendtoks \MPLIBallocate{500}\to \everydump
\appendtoks \MPLIBregister \to \everyjob
\def\MPLIBgraphictext#1%
{\startTEXpage[scale=10000]#1\stopTEXpage}
\protect \endinput
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