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%D \module
%D [ file=colo-ini,
%D version=2007.08.08,
%D title=\CONTEXT\ Color Macros,
%D subtitle=Initialization,
%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.
\unprotect
\chardef\colorversion=2
% todo: palets in definecolor
% todo: {\red xx} vs \red{xx}
% check: registerusedspotcolors
% check: registerusedcolorchannels
% check: \currentcolorname
% check: \outercolorname
% check: \chardef\currentcolorchannel=0
% check: \startcolormode
% check: \newif\iffilterspotcolor \filterspotcolorfalse
% check: \newif\ifdoingspotcolor \doingspotcolorfalse
% check: \registercolorchannel
% \def\mptexcolor#1{"\dogetattributeid\s!color \somecolorattribute{#1} A"}
%
% \startMPpage
% fill fullcircle scaled 10cm ;
% fill fullcircle scaled 5cm withprescript \mptexcolor{red} withpostscript \mptexcolor{black} ;
% fill fullcircle scaled 3cm ;
% draw btex test etex withprescript \mptexcolor{blue} ;
% \stopMPpage
\registerctxluafile{colo-new}{1.000}
\ifx\currentcolormodel\undefined \newcount\currentcolormodel \fi
\def\setcolormodel#1%
{\currentcolormodel\ctxlua{tex.print(colors.setmodel('colormodel','#1'))}%
\dosetattribute{colormodel}{\the\currentcolormodel}}
\setcolormodel{all}
\def\dosetupcolormodel
{\ifincolor
\ifRGBsupported
\ifCMYKsupported
\setcolormodel{all}%
\else
\setcolormodel{rgb}%
\fi
\else
\ifCMYKsupported
\setcolormodel{cmyk}%
\else
\setcolormodel{gray}%
\fi
\fi
\else
\setcolormodel{gray}%
\fi}
% Currently in mkiv transparency is implemented independent of color. This costs
% a bit more processing time but gives the possibility to apply transparency
% independently in the future. Is this useful? If not we may as well combine them
% again in the future. By coupling we are downward compatible. When we decouple we
% need to do more tricky housekeeping (e.g. persist color independent transparencies
% when color bound ones are nil.
% Since we couple definitions, we could stick to one test. Todo. Same for mpcolor.
% \def\doactivatecolor#1% : in currentpalet, maybe not, ugly
% {\ifcsname(cs:\currentpalet#1)\endcsname
% \csname(cs:\currentpalet#1)\endcsname
% \csname(ts:\currentpalet#1)\endcsname
% \else
% \csname(cs:#1)\endcsname
% \csname(ts:#1)\endcsname
% \fi}
% \def\doactivatecolor#1% : in currentpalet, maybe not, ugly
% {\csname(cs:\ifcsname(cs:\currentpalet#1)\endcsname\currentpalet\fi#1)\endcsname}
% \csname(ts:\ifcsname(ts:\currentpalet#1)\endcsname\currentpalet\fi#1)\endcsname}
%
% more robust test, else we get \relaxed non-colors which may confuse e.g. mpcolor
\letvalue{(cs:-}\empty
\letvalue{(ts:-}\empty
% \def\doactivatecolor#1% : in currentpalet, maybe not, ugly
% {\csname(cs:\ifcsname(cs:\currentpalet#1)\endcsname\currentpalet#1\else\ifcsname(cs:#1)\endcsname#1\else-\fi\fi)\endcsname
% \csname(ts:\ifcsname(ts:\currentpalet#1)\endcsname\currentpalet#1\else\ifcsname(ts:#1)\endcsname#1\else-\fi\fi)\endcsname}
\def\doactivatecolor#1% : in currentpalet, maybe not, ugly
{\ifcsname(cs:\currentpalet#1)\endcsname
\csname(cs:\currentpalet#1)\endcsname
\csname(ts:\currentpalet#1)\endcsname
\else\ifcsname(cs:#1)\endcsname
\csname(cs:#1)\endcsname
\csname(ts:#1)\endcsname
\fi\fi}
\let\normaldoactivatecolor\doactivatecolor
\def\doactivatecolor
{\ctxlua{colors.enabled=true}%
\let\doactivatecolor\normaldoactivatecolor
\doactivatecolor}
\def\deactivatecolor
{\doresetattribute\s!color
\doresetattribute\s!transparency}
\def\dodefinecolorcommand#1#2%
{\unexpanded#1{#2}{\doactivatecolor{#2}}}
\let\colordefinitionprefix\empty
\def\dodefinecolor[#1][#2]%
{\addtocommalist{#1}\colorlist
\ctxlua{ctx.defineprocesscolor("\colordefinitionprefix","#1","#2",false,\iffreezecolors true\else false\fi)}%
\dodefinecolorcommand\setvalue{#1}}
\def\dodefineglobalcolor[#1][#2]%
{\doglobal\addtocommalist{#1}\colorlist
\ctxlua{ctx.defineprocesscolor("\colordefinitionprefix","#1","#2",true,\iffreezecolors true\else false\fi)}%
\dodefinecolorcommand\setgvalue{#1}}
\def\dodefinenamedcolor[#1][#2]%
{\doglobal\addtocommalist{#1}\colorlist
\ctxlua{ctx.defineprocesscolor("\colordefinitionprefix","#1","#2",false,\iffreezecolors true\else false\fi)}%
\dodefinecolorcommand\setvalue{#1}}
\def\dodefinespotcolor[#1][#2][#3]%
{\doglobal\addtocommalist{#1}\colorlist % optional
\doglobal\addtocommalist{#2}\allspotcolors
\ctxlua{ctx.definespotcolor("\colordefinitionprefix","#1","#2","#3",true)}%
\dodefinecolorcommand\setxvalue{#1}}
\def\dodefinemultitonecolor[#1][#2][#3][#4]%
{\ctxlua{ctx.definemultitonecolor("\colordefinitionprefix","#1","#2","#3","#4",true)}%
\dodefinecolorcommand\setxvalue{#1}}
\def\dodefinetransparency[#1][#2]%
{\ctxlua{ctx.definetransparency("#1",#2)}}
\def\dosetrastercolor#1% slow, we need a fast one
{\edef\@@rastervalue{#1}%
\ifx\@@rastervalue\empty
\let\@@rastervalue\@@rsscreen
\fi
\dosetattribute\s!color{\ctxlua{tex.sprint(ctx.definesimplegray("_raster_",\@@rastervalue))}}}
\def\doifcolorelse#1%
{\ifcsname(ca:\currentpalet#1)\endcsname
\@EA\firstoftwoarguments
\else\ifcsname(ca:#1)\endcsname
\@EAEAEA\firstoftwoarguments
\else
\@EAEAEA\secondoftwoarguments
\fi\fi}
\def\doifcolor#1%
{\ifcsname(ca:\currentpalet#1)\endcsname
\@EA\firstofoneargument
\else\ifcsname(ca:#1)\endcsname
\@EAEAEA\firstofoneargument
\else
\@EAEAEA\gobbleoneargument
\fi\fi}
% currentcolor, then we can push pop in register
\def\switchtocolor [#1]{\getvalue{#1}}
\unexpanded\def\color [#1]{\groupedcommand{\doactivatecolor{#1}}{}}
\unexpanded\def\startcolor [#1]{\begingroup\doactivatecolor{#1}}
\unexpanded\def\stopcolor {\endgroup}
\unexpanded\def\graycolor [#1]{\groupedcommand{\setcolormodel{gray}\getvalue{#1}}{}}
\def\predefinecolor [#1]{\flushatshipout{\hbox{\color[#1]{}}}}
\def\predefineindexcolor[#1]{\flushatshipout{\hbox{\color[#1]{}}}}
\def\startcolorpage {\startcolor[\ifx\maintextcolor\empty\defaulttextcolor\else\maintextcolor\fi]}
\def\stopcolorpage {\stopcolor}
\def\localstartraster [#1]{\dosetrastercolor{#1}}
\def\localstopraster {}
\def\startraster [#1]{\dosetrastercolor{#1}}
\def\stopraster {}
\def\raster [#1]{\groupedcommand{\dosetrastercolor{#1}}{}}
\def\faststartcolor [#1]{\doactivatecolor{#1}}
\def\faststopcolor {}
\def\startregistercolor[#1]%
{\doifelsenothing{#1}
{\let\stopregistercolor\relax}
{\edef\stopregistercolor
{\dosetattribute\s!color {\dogetattribute\s!color }%
\dosetattribute\s!transparency{\dogetattribute\s!transparency}}%
\doactivatecolor{#1}}}
\let\resynccolor \relax % ?
\let\pushcolor \relax
\let\popcolor \relax
\let\popsplitcolor\relax
\def\restorecolormode
{\ifincolor
\deactivatecolor
\ifx\maintextcolor\empty \else
\doactivatecolor\maintextcolor
\fi
\fi}
\def\pushpostponedpagecolor
{\edef\savedtopofpagecolor{\topofpagecolor}%
\doifsomething\savedtopofpagecolor\restorecolormode}
\def\poppostponedpagecolor
{\doifsomething\savedtopofpagecolor\doactivatecolor\savedtopofpagecolor}
% \def\pushcolor
% {\edef\popcolor
% {\dosetattribute\s!color {\dogetattribute\s!color }%
% \dosetattribute\s!transparency{\dogetattribute\s!transparency}}%
% \let\popsplitcolor\popcolor
% \deactivatecolor}
\appendtoks\deactivatecolor\to\everybeforeoutput % maybe we don't need push pop now
\def\startregistercolor[#1]%
{\doifelsenothing{#1}
{\let\stopregistercolor\relax}
{\edef\stopregistercolor
{\dosetattribute\s!color {\dogetattribute\s!color }%
\dosetattribute\s!transparency{\dogetattribute\s!transparency}}%
\doactivatecolor{#1}}}
\let\grey \graycolor
\let\localstartcolor \startcolor
\let\localstopcolor \stopcolor
\let\globalstartcolor\startcolor
\let\globalstopcolor \stopcolor
\def\registermaintextcolor{\ctxlua{colors.main = \thecolorattribute\maintextcolor}}
\def\starttextcolor[#1]%
{\doifsomething{#1}
{\definecolor[\@@themaintextcolor][#1]%
\let\maintextcolor\@@themaintextcolor
\doactivatecolor\maintextcolor
\registermaintextcolor}}
\let\stoptextcolor\relax
\def\initializemaintextcolor
{\doifelsenothing\@@cltextcolor
{\definecolor[\@@themaintextcolor][\defaulttextcolor]}
{\definecolor[\@@themaintextcolor][\@@cltextcolor]}%
\let\maintextcolor\@@themaintextcolor
\doactivatecolor\maintextcolor
\registermaintextcolor}
\appendtoks \initializemaintextcolor \to \everyjob
\def\localstarttextcolor{\expanded{\startcolor[\ifx\maintextcolor\empty\defaulttextcolor\else\maintextcolor\fi]}}
\let\localstoptextcolor \stopcolor
\let\restoretextcolor \firstofoneargument
\def\dodefinepaletcolor#1#2#3%
{\doifassignmentelse{#3}% \definepalet[test][xx={y=.4}]
{\definecolor[\??pa#1:#2][#3]%
\iffreezecolors\@EA\setevalue\else\@EA\setvalue\fi{(cs:#1:#2)}{\csname(cs:\??pa#1:#2)\endcsname}%
\iffreezecolors\@EA\setevalue\else\@EA\setvalue\fi{(ca:#1:#2)}{\csname(ca:\??pa#1:#2)\endcsname}}
{\doifdefinedelse{(cs:#3)}% \definepalet[test][xx=green]
{\iffreezecolors\@EA\setevalue\else\@EA\setvalue\fi{(cs:#1:#2)}{\csname(cs:#3)\endcsname}%
\iffreezecolors\@EA\setevalue\else\@EA\setvalue\fi{(ca:#1:#2)}{\csname(ca:#3)\endcsname}}
{\letvalue{(cs:#1:#2)}\undefined
\letvalue{(ca:#1:#2)}\undefined}}}
\setvalue{(cs:)}{} \setvalue{(ca:)}{0}
\setvalue{(ts:)}{} \setvalue{(ta:)}{0}
\def\doinheritca#1{\csname(ca:\ifcsname(ca:\currentpalet#1)\endcsname\currentpalet#1\else\ifcsname(ca:#1)\endcsname#1\fi\fi)\endcsname}
\def\doinheritcs#1{\csname(cs:\ifcsname(cs:\currentpalet#1)\endcsname\currentpalet#1\else\ifcsname(cs:#1)\endcsname#1\fi\fi)\endcsname}
\def\doinheritta#1{\csname(ta:\ifcsname(ta:\currentpalet#1)\endcsname\currentpalet#1\else\ifcsname(ta:#1)\endcsname#1\fi\fi)\endcsname}
\def\doinheritts#1{\csname(ts:\ifcsname(ts:\currentpalet#1)\endcsname\currentpalet#1\else\ifcsname(ts:#1)\endcsname#1\fi\fi)\endcsname}
\def\MPcolor#1{\ctxlua{tex.sprint(ctx.mpcolor(\number\currentcolormodel,\number\doinheritca{#1},\number\doinheritta{#1}))}}
\def\currentcolorname{\s!black} % todo
\def\outercolorname {\s!black} % todo
\def\thecolorattribute #1{\number\csname(ca:\ifcsname(ca:\currentpalet#1)\endcsname\currentpalet#1\else\ifcsname(ca:#1)\endcsname#1\fi\fi)\endcsname}
\def\thetransparencyattribute#1{\number\csname(ta:\ifcsname(ta:\currentpalet#1)\endcsname\currentpalet#1\else\ifcsname(ta:#1)\endcsname#1\fi\fi)\endcsname}
\def\PDFcolor #1{\ctxlua{tex.sprint(ctx.pdfcolor (\number\currentcolormodel, \thecolorattribute{#1}))}}
\def\PDFcolorvalue#1{\ctxlua{tex.sprint(ctx.pdfcolorvalue(\number\currentcolormodel, \thecolorattribute{#1}))}}
\def\FDFcolor #1{\ctxlua{tex.sprint(ctx.fdfcolor (\number\currentcolormodel, \thecolorattribute{#1}))}}
\def\internalspotcolorname#1{\ctxlua{tex.sprint(ctx.spotcolorname (\thecolorattribute{#1}))}}
\def\internalspotcolorsize#1{\ctxlua{tex.sprint(ctx.spotcolorvalue(\thecolorattribute{#1}))}}
\def\colorcomponents #1{\ctxlua{tex.sprint(ctx.colorcomponents (\thecolorattribute {#1}))}}
\def\transparencycomponents#1{\ctxlua{tex.sprint(ctx.transparencycomponents(\thetransparencyattribute{#1}))}}
\def\colorvalue#1{\ctxlua{tex.sprint(ctx.formatcolor(\thecolorattribute{#1},"\colorformatseparator"))}}
\def\grayvalue #1{\ctxlua{tex.sprint(ctx.formatgray (\thecolorattribute{#1},"\colorformatseparator"))}}
% hack, till we have adapted backend: (move it there)
\def\presetPDFtransparencybynumber#1#2#3%
{\initializetransparency
\ifcase#1\else
\global\PDFcurrenttransparency\numexpr#1+\minusone\relax
\presetPDFtransparency{#2}{#3}%
\fi}
\protect \endinput
|
