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%D \module
%D [ file=mp-mlib.mp,
%D version=2008.03.21,
%D title=\CONTEXT\ \METAPOST\ graphics,
%D subtitle=specials,
%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 licen-en.pdf for
%C details.
if unknown mplib : endinput ; fi ;
if known context_mlib : endinput ; fi ;
boolean context_mlib ; context_mlib := true ;
numeric _tt_w_[], _tt_h_[], _tt_d_[] ;
numeric _tt_n_ ; _tt_n_ := 0 ;
picture _tt_p_ ; _tt_p_ := nullpicture ;
boolean _trial_run_ ; _trial_run_ := false ;
def resettextexts =
_tt_n_ := 0 ;
_tt_p_ := nullpicture ;
enddef ;
extra_endfig := ";draw _tt_p_; " & extra_endfig ;
extra_beginfig := extra_beginfig & "resettextexts;";
vardef textext(expr str) =
if _trial_run_ :
image (
_tt_n_ := _tt_n_ + 1 ;
_tt_p_ := image (
draw _tt_p_ ;
draw unitsquare withprescript "tf" withpostscript decimal _tt_n_ & ":" & str ;
) ;
draw unitsquare ;
)
else :
image (
_tt_n_ := _tt_n_ + 1 ;
show _tt_n_ ;
draw unitsquare
xscaled _tt_w_[_tt_n_]
yscaled (_tt_h_[_tt_n_] + _tt_d_[_tt_n_])
withprescript "ts"
withpostscript decimal _tt_n_ & ":" & str ;
)
fi
enddef ;
def circular_shade (expr p, n, ca, cb) =
begingroup ;
save ab, r ; pair ab ; numeric r ;
r := (xpart lrcorner p - xpart llcorner p) ++ (ypart urcorner p - ypart lrcorner p) ;
set_circular_vector(ab,r)(p,n) ;
fill p withcircularshade(ab,ab,0,r,ca,cb) ;
if trace_shades :
drawarrow ab -- ab shifted (0,r) withpen pencircle scaled 1pt withcolor .5white ;
fi ;
endgroup ;
enddef ;
def linear_shade (expr p, n, ca, cb) =
begingroup ;
save a, b, sh ; pair a, b ;
set_linear_vector(a,b)(p,n) ;
fill p withlinearshade(a,b,ca,cb) ;
if trace_shades :
drawarrow a -- b withpen pencircle scaled 1pt withcolor .5white ;
fi ;
endgroup ;
enddef ;
def withcircularshade (expr a, b, ra, rb, ca, cb) =
withprescript
"cs"
withpostscript
"0 1 " & decimal shadefactor & " " &
colordecimals ca & " " & ddecimal (a shifted shadeoffset) & " " & decimal ra & " " &
colordecimals cb & " " & ddecimal (b shifted shadeoffset) & " " & decimal rb
enddef ;
def withlinearshade (expr a, b, ca, cb) =
withprescript
"ls"
withpostscript
"0 1 " & decimal shadefactor & " " &
colordecimals ca & " " & ddecimal (a shifted shadeoffset) & " " &
colordecimals cb & " " & ddecimal (b shifted shadeoffset)
enddef ;
string _defined_cs_pre_[], _defined_cs_post_[] ; numeric _defined_cs_ ; _defined_cs_:= 0 ;
vardef define_circular_shade (expr a, b, ra, rb, ca, cb) =
_defined_cs_ := _defined_cs_ + 1 ;
_defined_cs_pre_ [_defined_cs_] := "cs" ;
_defined_cs_post_[_defined_cs_] := "0 1 " & decimal shadefactor & " " &
colordecimals ca & " " & ddecimal (a shifted shadeoffset) & " " & decimal ra & " " &
colordecimals cb & " " & ddecimal (b shifted shadeoffset) & " " & decimal rb ;
_defined_cs_
enddef ;
vardef define_linear_shade (expr a, b, ca, cb) =
_defined_cs_ := _defined_cs_ + 1 ;
_defined_cs_pre_ [_defined_cs_] := "ls" ;
_defined_cs_post_[_defined_cs_] := "0 1 " & decimal shadefactor & " " &
colordecimals ca & " " & ddecimal (a shifted shadeoffset) & " " &
colordecimals cb & " " & ddecimal (b shifted shadeoffset) ;
_defined_cs_
enddef ;
primarydef p withshade sc =
p withprescript _defined_cs_pre_[sc] withpostscript _defined_cs_post_[sc]
enddef ;
def shadecolor(expr sc) = % obsolete
1 withprescript _defined_cs_pre_[sc] withpostscript _defined_cs_post_[sc]
enddef ;
def graphictext primary t =
if _trial_run_ :
let dographictextindeed = nographictext ;
else :
let dographictextindeed = dographictext ;
fi
dographictextindeed(t)
enddef ;
def dographictext (expr t) =
begingroup ;
save figurepicture ; picture figurepicture ;
figurepicture := currentpicture ; currentpicture := nullpicture ;
currentgraphictext := currentgraphictext + 1 ;
dofinishgraphictext
enddef ;
def nographictext (expr t) text rest =
draw unitsquare withprescript "gt" withpostscript t ;
enddef ;
def savegraphictext (expr str) =
enddef ;
def erasegraphictextfile =
enddef ;
def doexternalfigure (expr filename) text transformation =
draw unitsquare transformation withprescript "fg" withpostscript filename ;
enddef ;
extra_beginfig := extra_beginfig & "currentgraphictext := 0 ; " ;
extra_endfig := extra_endfig & "finishsavingdata ; " ;
extra_endfig := extra_endfig & "resettextexts ; " ;
boolean cmykcolors ; cmykcolors := true ;
boolean spotcolors ; spotcolors := true ;
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