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%D \module
%D [ file=meta-fig,
%D version=2000.09.07,
%D title=\METAPOST\ Graphics,
%D subtitle=Stand Alone Graphics,
%D author=Hans Hagen,
%D date=\currentdate,
%D copyright={PRAGMA / Hans Hagen \& Ton Otten}]
%C
%C This module is part of the \CONTEXT\ macro||package and is
%C therefore copyrighted by \PRAGMA. See mreadme.pdf for
%C details.
\writestatus{loading}{MetaPost Graphics / Stand Alone Graphics}
\unprotect
%D This module implements a method for defining
%D stand||alone||graphics, that is, each graphic gets is own
%D page. Because graphics are wrapped in a \type {\framed},
%D you can add overlays to the graphic directly, and since the
%D whole \CONTEXT\ machinery is available, you can also add
%D page backgrounds.
%D
%D \starttypen
%D \setupMPpage
%D [offset=1pt,
%D background=color,
%D backgroundcolor=green]
%D
%D \startMPpage
%D fill fullcircle scaled 10cm withcolor red ;
%D \stopMPpage
%D
%D \startMPpage
%D fill fullsquare rotated 45 scaled 8cm withcolor blue ;
%D \stopMPpage
%D \stoptypen
%D
%D Although this is hardly of any use, you can mix these
%D definitions with the text flow, since all settings are
%D kept local. The page is clipped to the image size.
% \presetlocalframed[\??mp]
%
% \def\setupMPpage%
% {\dodoubleargument\getparameters[\??mp]}
%
% \def\startMPpage%
% {\dosingleempty\dostartMPpage}
%
% \long\def\dostartMPpage[#1]#2\stopMPpage
% {\pagina
% \bgroup
% \setbox\scratchbox=\hbox
% {\localframed[\??mp][#1]{\startMPcode#2\stopMPcode}}
% \edef\MPwd{\the\wd\scratchbox}
% \edef\MPht{\the\ht\scratchbox}
% \definieerpapierformaat
% [\s!dummy]
% [\c!breedte=\MPwd,
% \c!hoogte=\MPht]
% \startlocal % keep settings as local as can be
% \stelpapierformaatin
% [\s!dummy][\s!dummy]
% \stellayoutin
% [\c!breedte=\MPwd,\c!hoogte=\MPht,
% \c!kopwit=\!!zeropoint,\c!rugwit=\!!zeropoint,
% \c!snijwit=\!!zeropoint,\c!bodemwit=\!!zeropoint,
% \c!hoofd=\!!zeropoint,\c!voet=\!!zeropoint]
% \stoplocal % which saves us the trouble of push/pop
% \getvalue{\e!start\v!standaard\e!opmaak}%
% \centerbox{\box\scratchbox}%
% \getvalue{\e!stop\v!standaard\e!opmaak}%
% \egroup}
%
% \setupMPpage
% [\c!strut=\v!nee,
% \c!uitlijnen=,
% \c!offset=\v!overlay,
% \c!breedte=\v!passend,
% \c!hoogte=\v!passend,
% \c!kader=\v!uit]
% generalized, so this belongs in another module
\def\dostartfittingpage[#1][#2]%
{\pagina
\bgroup
\setbox\scratchbox=\hbox
\bgroup
\getparameters[#1][#2]%
\schaal[\c!schaal=\getvalue{#1\c!schaal}]\bgroup\localframed[#1]\bgroup}
\def\dostopfittingpage%
{\egroup\egroup\egroup
\edef\fittingwd{\the\wd\scratchbox}
\edef\fittinght{\the\ht\scratchbox}
\definieerpapierformaat
[\s!dummy]
[\c!breedte=\fittingwd,
\c!hoogte=\fittinght]
\startlocal % keep settings as local as can be
\stelpapierformaatin
[\s!dummy][\s!dummy]
\stellayoutin
[\c!breedte=\fittingwd,\c!hoogte=\fittinght,\c!plaats=\v!midden,
\c!kopwit=\!!zeropoint,\c!rugwit=\!!zeropoint,
\c!snijwit=\!!zeropoint,\c!bodemwit=\!!zeropoint,
\c!hoofd=\!!zeropoint,\c!voet=\!!zeropoint]
\stoplocal % which saves us the trouble of push/pop
\getvalue{\e!start\v!standaard\e!opmaak}%
\centerbox{\box\scratchbox}%
\getvalue{\e!stop\v!standaard\e!opmaak}%
\egroup}
% MP pages
\presetlocalframed[\??mg]
\def\setupMPpage%
{\dodoubleargument\getparameters[\??mg]}
\def\startMPpage%
{\dosingleempty\dostartMPpage}
\long\def\dostartMPpage[#1]#2\stopMPpage
{\dostartfittingpage[\??mg][#1]%
\startMPcode#2\stopMPcode%
\dostopfittingpage}
\setupMPpage
[\c!schaal=1000,
\c!strut=\v!nee,
\c!uitlijnen=,
\c!offset=\v!overlay,
\c!breedte=\v!passend,
\c!hoogte=\v!passend,
\c!kader=\v!uit]
% tex pages
\presetlocalframed[\??tg]
\def\setupTEXpage%
{\dodoubleargument\getparameters[\??tg]}
\def\startTEXpage%
{\dodoubleempty\dostartfittingpage[\??tg]}
\def\stopTEXpage%
{\dostopfittingpage}
\setupTEXpage
[\c!schaal=1000,
\c!strut=\v!nee,
\c!uitlijnen=\v!normaal, % needed, else problems !
\c!offset=\v!overlay,
\c!breedte=\v!passend,
\c!hoogte=\v!passend,
\c!kader=\v!uit]
%D \macros
%D {MPfigure}
%D
%D A bit out of place, here but nevertheless:
\def\MPfigure#1#2% test for dup figure
{\bgroup
\getfiguredimensions[#1][\c!object=\v!nee]%
\freezedimenmacro\naturalfigurewidth
\freezedimenmacro\naturalfigureheight
\startMPcode
externalfigure "#1"
xscaled \naturalfigurewidth\space
yscaled \naturalfigureheight\space
#2 ;
\stopMPcode
\egroup}
\protect \endinput
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