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-rw-r--r--metapost/context/base/mp-mlib.mpiv585
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+%D \module
+%D [ file=mp-mlib.mp,
+%D version=2008.03.21,
+%D title=\CONTEXT\ \METAPOST\ graphics,
+%D subtitle=plugins,
+%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 ;
+
+%D Color and transparency
+%D
+%D Separable:
+
+newinternal normaltransparent ; normaltransparent := 1 ;
+newinternal multiplytransparent ; multiplytransparent := 2 ;
+newinternal screentransparent ; screentransparent := 3 ;
+newinternal overlaytransparent ; overlaytransparent := 4 ;
+newinternal softlighttransparent ; softlighttransparent := 5 ;
+newinternal hardlighttransparent ; hardlighttransparent := 6 ;
+newinternal colordodgetransparent ; colordodgetransparent := 7 ;
+newinternal colorburntransparent ; colorburntransparent := 8 ;
+newinternal darkentransparent ; darkentransparent := 9 ;
+newinternal lightentransparent ; lightentransparent := 10 ;
+newinternal differencetransparent ; differencetransparent := 11 ;
+newinternal exclusiontransparent ; exclusiontransparent := 12 ;
+
+%D Nonseparable:
+
+newinternal huetransparent ; huetransparent := 13 ;
+newinternal saturationtransparent ; saturationtransparent := 14 ;
+newinternal colortransparent ; colortransparent := 15 ;
+newinternal luminositytransparent ; luminositytransparent := 16 ;
+
+vardef transparency_alternative_to_number(expr name) =
+ if string name :
+ if expandafter known scantokens(name & "transparent") :
+ scantokens(name & "transparent")
+ else :
+ 0
+ fi
+ elseif name < 17 :
+ name
+ else :
+ 0
+ fi
+enddef ;
+
+% def namedcolor(expr n, v) =
+% 1
+% withprescript "sp_type=named"
+% withprescript "sp_name=" & n
+% withprescript "sp_value=" & v
+% enddef ;
+
+def spotcolor(expr n, v) =
+ 1
+ withprescript "sp_type=spot"
+ withprescript "sp_name=" & n
+ withprescript "sp_value=" & v
+enddef ;
+
+def multitonecolor(expr name, fractions, components, value) =
+ 1
+ withprescript "sp_type=multitone"
+ withprescript "sp_name=" & name
+ withprescript "sp_fractions=" & decimal fractions
+ withprescript "sp_components=" & components
+ withprescript "sp_value=" & value
+enddef ;
+
+def transparent(expr alternative, transparency)(text c) =
+ 1 % this permits withcolor x intoshade y
+ withprescript "tr_alternative=" & decimal transparency_alternative_to_number(alternative)
+ withprescript "tr_transparency=" & decimal transparency
+ withcolor c
+enddef ;
+
+def withtransparency(expr alternative, transparency) =
+ withprescript "tr_alternative=" & decimal transparency_alternative_to_number(alternative)
+ withprescript "tr_transparency=" & decimal transparency
+enddef ;
+
+def cmyk(expr c, m, y, k) =
+ (c,m,y,k)
+enddef ;
+
+% Texts
+
+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 ;
+
+def flushtextexts =
+ addto currentpicture also _tt_p_
+enddef ;
+
+extra_endfig := "flushtextexts;" & extra_endfig;
+extra_beginfig := extra_beginfig & "resettextexts;";
+
+% We collect and flush them all, as we can also have temporary textexts
+% that gets never really flushed but are used for calculations. So, we
+% flush twice: once in location in order to pick up e.g. color properties,
+% and once at the end because we need to flush missing ones.
+
+vardef rawtextext(expr str) =
+ if str = "" :
+ nullpicture
+ elseif _trial_run_ :
+ _tt_n_ := _tt_n_ + 1 ;
+ addto _tt_p_ doublepath unitsquare
+ withprescript "tx_number=" & decimal _tt_n_
+ withprescript "tx_stage=extra"
+ withpostscript str ;
+ image (
+ addto currentpicture doublepath unitsquare
+ withprescript "tx_number=" & decimal _tt_n_
+ withprescript "tx_stage=trial"
+ withpostscript str
+ )
+ else :
+ _tt_n_ := _tt_n_ + 1 ;
+ if known _tt_d_[_tt_n_] :
+ image (
+ addto currentpicture doublepath unitsquare
+ xscaled _tt_w_[_tt_n_]
+ yscaled (_tt_h_[_tt_n_] + _tt_d_[_tt_n_])
+ withprescript "tx_number=" & decimal _tt_n_
+ withprescript "tx_stage=final"
+ ; % withpostscript str ;
+ ) shifted (0,-_tt_d_[_tt_n_])
+ else :
+ image (
+ addto currentpicture doublepath unitsquare ;
+ )
+ fi
+ fi
+enddef ;
+
+% More text
+
+pair laboff.d, laboff.dlft, laboff.drt ; % new positional suffixes
+pair laboff.origin, laboff.raw ; % graph mess
+
+laboff.d := laboff ; labxf.d := labxf ; labyf.d := labyf ;
+laboff.dlft := laboff.lft ; labxf.dlft := labxf.lft ; labyf.dlft := labyf.lft ;
+laboff.drt := laboff.rt ; labxf.drt := labxf.rt ; labyf.drt := labyf.rt ;
+
+labtype := 0 ; labtype.lft := 1 ; labtype.rt := 2 ;
+labtype.bot := 3 ; labtype.top := 4 ; labtype.ulft := 5 ;
+labtype.urt := 6 ; labtype.llft := 7 ; labtype.lrt := 8 ;
+labtype.d := 10 ; labtype.dlft := 11 ; labtype.drt := 12 ;
+labtype.origin := 0 ; labtype.raw := 0 ;
+
+% laboff.origin = (infinity,infinity) ; labxf.origin := 0 ; labyf.origin := 0 ;
+% laboff.raw = (infinity,infinity) ; labxf.raw := 0 ; labyf.raw := 0 ;
+
+% todo: thelabel.origin("xxxx",origin) (overflows)
+
+laboff.origin = (0,0) ; labxf.origin := 0 ; labyf.origin := 0 ;
+laboff.raw = (0,0) ; labxf.raw := 0 ; labyf.raw := 0 ;
+
+pair laboff.l ; laboff.l = laboff.lft ;
+pair laboff.r ; laboff.r = laboff.rt ;
+pair laboff.b ; laboff.b = laboff.bot ;
+pair laboff.t ; laboff.t = laboff.top ;
+pair laboff.l_t ; laboff.l_t = laboff.ulft ;
+pair laboff.r_t ; laboff.r_t = laboff.urt ;
+pair laboff.l_b ; laboff.l_b = laboff.llft ;
+pair laboff.r_b ; laboff.r_b = laboff.lrt ;
+pair laboff.t_l ; laboff.t_l = laboff.ulft ;
+pair laboff.t_r ; laboff.t_r = laboff.urt ;
+pair laboff.b_l ; laboff.b_l = laboff.llft ;
+pair laboff.b_r ; laboff.b_r = laboff.lrt ;
+
+numeric labxf.l ; labxf.l = labxf.lft ;
+numeric labxf.r ; labxf.r = labxf.rt ;
+numeric labxf.b ; labxf.b = labxf.bot ;
+numeric labxf.t ; labxf.t = labxf.top ;
+numeric labxf.l_t ; labxf.l_t = labxf.ulft ;
+numeric labxf.r_t ; labxf.r_t = labxf.urt ;
+numeric labxf.l_b ; labxf.l_b = labxf.llft ;
+numeric labxf.r_b ; labxf.r_b = labxf.lrt ;
+numeric labxf.t_l ; labxf.t_l = labxf.ulft ;
+numeric labxf.t_r ; labxf.t_r = labxf.urt ;
+numeric labxf.b_l ; labxf.b_l = labxf.llft ;
+numeric labxf.b_r ; labxf.b_r = labxf.lrt ;
+
+numeric labyf.l ; labyf.l = labyf.lft ;
+numeric labyf.r ; labyf.r = labyf.rt ;
+numeric labyf.b ; labyf.b = labyf.bot ;
+numeric labyf.t ; labyf.t = labyf.top ;
+numeric labyf.l_t ; labyf.l_t = labyf.ulft ;
+numeric labyf.r_t ; labyf.r_t = labyf.urt ;
+numeric labyf.l_b ; labyf.l_b = labyf.llft ;
+numeric labyf.r_b ; labyf.r_b = labyf.lrt ;
+numeric labyf.t_l ; labyf.t_l = labyf.ulft ;
+numeric labyf.t_r ; labyf.t_r = labyf.urt ;
+numeric labyf.b_l ; labyf.b_l = labyf.llft ;
+numeric labyf.b_r ; labyf.b_r = labyf.lrt ;
+
+numeric labtype.l ; labtype.l = labtype.lft ;
+numeric labtype.r ; labtype.r = labtype.rt ;
+numeric labtype.b ; labtype.b = labtype.bot ;
+numeric labtype.t ; labtype.t = labtype.top ;
+numeric labtype.l_t ; labtype.l_t = labtype.ulft ;
+numeric labtype.r_t ; labtype.r_t = labtype.urt ;
+numeric labtype.l_b ; labtype.l_b = labtype.llft ;
+numeric labtype.r_b ; labtype.r_b = labtype.lrt ;
+numeric labtype.t_l ; labtype.t_l = labtype.ulft ;
+numeric labtype.t_r ; labtype.t_r = labtype.urt ;
+numeric labtype.b_l ; labtype.b_l = labtype.llft ;
+numeric labtype.b_r ; labtype.b_r = labtype.lrt ;
+
+vardef thetextext@#(expr p,z) = % adapted copy of thelabel@
+ if string p :
+ thetextext@#(rawtextext(p),z)
+ else :
+ p
+ if (labtype@# >= 10) : shifted (0,ypart center p) fi
+ shifted (z + labeloffset*laboff@# - (labxf@#*lrcorner p + labyf@#*ulcorner p + (1-labxf@#-labyf@#)*llcorner p))
+ fi
+enddef ;
+
+vardef textext@#(expr txt) =
+ interim labeloffset := textextoffset ;
+ if string txt :
+ thetextext@#(rawtextext(txt),origin)
+ else :
+ thetextext@#(txt,origin)
+ fi
+enddef ;
+
+% \starttext
+% \startMPpage
+% numeric value ; value = 123 ;
+% label.lft(decimal value,origin) ;
+% draw "oeps" infont defaultfont ;
+% \stopMPpage
+% \stoptext
+
+vardef thelabel@#(expr s, z) =
+ save p ; picture p ;
+ if picture s :
+ p = s ;
+ else :
+ p = textext("\definedfont[" & defaultfont & "]" & s) scaled defaultscale ;
+ fi ;
+ p shifted (z + labeloffset*laboff@# - (labxf@#*lrcorner p + labyf@#*ulcorner p + (1-labxf@#-labyf@#)*llcorner p))
+enddef;
+
+let normalinfont = infont ;
+
+primarydef str infont name = % very naughty !
+ if name = "" :
+ textext(str)
+ else :
+ textext("\definedfont[" & name & "]" & str)
+ fi
+enddef ;
+
+% Shades
+
+newinternal shadefactor ; shadefactor := 1 ;
+pair shadeoffset ; shadeoffset := origin ;
+boolean trace_shades ; trace_shades := false ;
+
+def set_linear_vector (suffix a,b)(expr p,n) =
+ if (n=1) : a := llcorner p ; b := urcorner p ;
+ elseif (n=2) : a := lrcorner p ; b := ulcorner p ;
+ elseif (n=3) : a := urcorner p ; b := llcorner p ;
+ elseif (n=4) : a := ulcorner p ; b := lrcorner p ;
+ elseif (n=5) : a := .5[ulcorner p,llcorner p] ; b := .5[urcorner p,lrcorner p] ;
+ elseif (n=6) : a := .5[llcorner p,lrcorner p] ; b := .5[ulcorner p,urcorner p] ;
+ elseif (n=7) : a := .5[lrcorner p,urcorner p] ; b := .5[llcorner p,ulcorner p] ;
+ elseif (n=8) : a := .5[urcorner p,ulcorner p] ; b := .5[lrcorner p,llcorner p] ;
+ else : a := .5[ulcorner p,llcorner p] ; b := .5[urcorner p,lrcorner p] ;
+ fi ;
+enddef ;
+
+def set_circular_vector (suffix ab, r)(expr p,n) =
+ if (n=1) : ab := llcorner p ;
+ elseif (n=2) : ab := lrcorner p ;
+ elseif (n=3) : ab := urcorner p ;
+ elseif (n=4) : ab := ulcorner p ;
+ else : ab := center p ; r := .5r ;
+ 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 "sh_type=circular"
+ withprescript "sh_domain=0 1"
+ withprescript "sh_factor=" & decimal shadefactor
+ withprescript "sh_color_a=" & colordecimals ca
+ withprescript "sh_color_b=" & colordecimals cb
+ withprescript "sh_center_a=" & ddecimal (a shifted shadeoffset)
+ withprescript "sh_center_b=" & ddecimal (b shifted shadeoffset)
+ withprescript "sh_radius_a=" & decimal ra
+ withprescript "sh_radius_b=" & decimal rb
+enddef ;
+
+def withlinearshade (expr a, b, ca, cb) =
+ withprescript "sh_type=linear"
+ withprescript "sh_domain=0 1"
+ withprescript "sh_factor=" & decimal shadefactor
+ withprescript "sh_color_a=" & colordecimals ca
+ withprescript "sh_color_b=" & colordecimals cb
+ withprescript "sh_center_a=" & ddecimal (a shifted shadeoffset)
+ withprescript "sh_center_b=" & ddecimal (b shifted shadeoffset)
+enddef ;
+
+string _defined_cs_pre_[] ; numeric _defined_cs_ ; _defined_cs_:= 0 ;
+string prescript_separator ; prescript_separator := char(13) ;
+
+vardef define_circular_shade (expr a, b, ra, rb, ca, cb) =
+ _defined_cs_ := _defined_cs_ + 1 ;
+ _defined_cs_pre_ [_defined_cs_] := "sh_type=circular"
+ & prescript_separator & "sh_domain=0 1"
+ & prescript_separator & "sh_factor=" & decimal shadefactor
+ & prescript_separator & "sh_color_a=" & colordecimals ca
+ & prescript_separator & "sh_color_b=" & colordecimals cb
+ & prescript_separator & "sh_center_a=" & ddecimal (a shifted shadeoffset)
+ & prescript_separator & "sh_center_b=" & ddecimal (b shifted shadeoffset)
+ & prescript_separator & "sh_radius_a=" & decimal ra
+ & prescript_separator & "sh_radius_b=" & decimal rb
+ ;
+ _defined_cs_
+enddef ;
+
+vardef define_linear_shade (expr a, b, ca, cb) =
+ _defined_cs_ := _defined_cs_ + 1 ;
+ _defined_cs_pre_ [_defined_cs_] := "sh_type=linear"
+ & prescript_separator & "sh_domain=0 1"
+ & prescript_separator & "sh_factor=" & decimal shadefactor
+ & prescript_separator & "sh_color_a=" & colordecimals ca
+ & prescript_separator & "sh_color_b=" & colordecimals cb
+ & prescript_separator & "sh_center_a=" & ddecimal (a shifted shadeoffset)
+ & prescript_separator & "sh_center_b=" & ddecimal (b shifted shadeoffset)
+ ;
+ _defined_cs_
+enddef ;
+
+primarydef p withshade sc =
+ p withprescript _defined_cs_pre_[sc]
+enddef ;
+
+
+vardef define_sampled_linear_shade(expr a,b,n)(text t) =
+ _defined_cs_ := _defined_cs_ + 1 ;
+ _defined_cs_pre_ [_defined_cs_] := "ssh_type=linear"
+ & prescript_separator & "ssh_center_a=" & ddecimal (a shifted shadeoffset)
+ & prescript_separator & "ssh_center_b=" & ddecimal (b shifted shadeoffset)
+ & prescript_separator & "ssh_nofcolors=" & decimal n
+ & prescript_separator & "ssh_domain=" & domstr
+ & prescript_separator & "ssh_extend=" & extstr
+ & prescript_separator & "ssh_colors=" & colstr
+ & prescript_separator & "ssh_bounds=" & bndstr
+ & prescript_separator & "ssh_ranges=" & ranstr
+ ;
+ _defined_cs_
+enddef ;
+
+vardef define_sampled_circular_shade(expr a,b,ra,rb,n)(text t) =
+ _defined_cs_ := _defined_cs_ + 1 ;
+ _defined_cs_pre_ [_defined_cs_] := "ssh_type=circular"
+ & prescript_separator & "ssh_center_a=" & ddecimal (a shifted shadeoffset)
+ & prescript_separator & "ssh_radius_a=" & decimal ra
+ & prescript_separator & "ssh_center_b=" & ddecimal (b shifted shadeoffset)
+ & prescript_separator & "ssh_radius_b=" & decimal rb
+ & prescript_separator & "ssh_nofcolors=" & decimal n
+ & prescript_separator & "ssh_domain=" & domstr
+ & prescript_separator & "ssh_extend=" & extstr
+ & prescript_separator & "ssh_colors=" & colstr
+ & prescript_separator & "ssh_bounds=" & bndstr
+ & prescript_separator & "ssh_ranges=" & ranstr
+ ;
+ _defined_cs_
+enddef ;
+
+% vardef predefined_linear_shade (expr p, n, ca, cb) =
+% save a, b, sh ; pair a, b ;
+% set_linear_vector(a,b)(p,n) ;
+% define_linear_shade (a,b,ca,cb)
+% enddef ;
+%
+% vardef predefined_circular_shade (expr p, n, ca, cb) =
+% 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) ;
+% define_circular_shade(ab,ab,0,r,ca,cb)
+% enddef ;
+
+% NEW EXPERIMENTAL CODE
+
+def withlinearshading (expr a, b) =
+ withprescript "sh_type=linear"
+ withprescript "sh_domain=0 1"
+ withprescript "sh_factor=" & decimal shadefactor
+ withprescript "sh_center_a=" & ddecimal (a shifted shadeoffset)
+ withprescript "sh_center_b=" & ddecimal (b shifted shadeoffset)
+enddef ;
+
+def withcircularshading (expr a, b, ra, rb) =
+ withprescript "sh_type=circular"
+ withprescript "sh_domain=0 1"
+ withprescript "sh_factor=" & decimal shadefactor
+ withprescript "sh_center_a=" & ddecimal (a shifted shadeoffset)
+ withprescript "sh_center_b=" & ddecimal (b shifted shadeoffset)
+ withprescript "sh_radius_a=" & decimal ra
+ withprescript "sh_radius_b=" & decimal rb
+enddef ;
+
+def withfromshadecolor expr t =
+ withprescript "sh_color=into"
+ withprescript "sh_color_a=" & colordecimals t
+enddef ;
+
+def withtoshadecolor expr t =
+ withprescript "sh_color=into"
+ withprescript "sh_color_b=" & colordecimals t
+enddef ;
+
+def withshading (expr how)(text rest) =
+ if how = "linear" :
+ withlinearshading(rest)
+ elseif how = "circular" :
+ withcircularshading(rest)
+ else :
+ % nothing
+ fi
+enddef ;
+
+primarydef a shadedinto b =
+ 1 % does not work with transparency
+ withprescript "sh_color=into"
+ withprescript "sh_color_a=" & colordecimals a
+ withprescript "sh_color_b=" & colordecimals b
+enddef ;
+
+% END OF NEW
+
+% Graphic text (we will move code here)
+
+def graphictext primary t =
+ if _trial_run_ :
+ let dographictextindeed = nographictext ;
+ else :
+ let dographictextindeed = dographictext ;
+ fi
+ dographictextindeed(t)
+enddef ;
+
+def dographictext (expr t) =
+ % withprescript "gt_stage=final"
+ begingroup ;
+ save figurepicture ; picture figurepicture ;
+ figurepicture := currentpicture ; currentpicture := nullpicture ;
+ currentgraphictext := currentgraphictext + 1 ;
+ dofinishgraphictext
+enddef ;
+
+def nographictext (expr t) text rest =
+ draw unitsquare withprescript "gt_stage=trial" withpostscript t
+enddef ;
+
+% def savegraphictext (expr str) =
+% enddef ;
+
+% def erasegraphictextfile =
+% enddef ;
+
+% Layers
+
+def onlayer primary name =
+ withprescript "la_name=" & name
+enddef ;
+
+
+% Figures
+
+% def externalfigure primary filename =
+% doexternalfigure (filename)
+% enddef ;
+%
+% def doexternalfigure (expr filename) text transformation =
+% if true : % a bit incompatible esp scaled 1cm now scaled the natural size
+% draw rawtextext("\externalfigure[" & filename & "]") transformation ;
+% else :
+% draw unitsquare transformation withprescript "fg_name=" & filename ;
+% fi ;
+% enddef ;
+
+def withmask primary filename =
+ withprescript "fg_mask=" & filename
+enddef ;
+
+def externalfigure primary filename =
+ if false :
+ rawtextext("\externalfigure[" & filename & "]")
+ else :
+ image (
+ addto currentpicture doublepath unitsquare
+ withprescript "fg_name=" & filename ;
+ )
+% unitsquare
+% withpen pencircle scaled 0
+% withprescript "fg_name=" & filename
+ fi
+enddef ;
+
+def figure primary filename =
+ rawtextext("\externalfigure[" & filename & "]")
+enddef ;
+
+% Positions
+
+def register (expr label, width, height, offset) =
+ image (
+ addto currentpicture doublepath unitsquare xscaled width yscaled height shifted offset
+ withprescript "ps_label=" & label ;
+ ) ; % no transformations
+enddef ;
+
+% Housekeeping
+
+extra_beginfig := extra_beginfig & "currentgraphictext := 0 ; " ;
+extra_endfig := extra_endfig & "finishsavingdata ; " ;
+extra_endfig := extra_endfig & "resettextexts ; " ;
+
+boolean cmykcolors ; cmykcolors := true ;
+boolean spotcolors ; spotcolors := true ;
+
+% Bonus
+
+vardef verbatim(expr str) =
+ ditto & "\detokenize{" & str & "}" & ditto
+enddef ;
+
+% New
+
+def bitmapimage(expr xresolution, yresolution, data) =
+ image (
+ addto currentpicture doublepath unitsquare
+ withprescript "bm_xresolution=" & decimal xresolution
+ withprescript "bm_yresolution=" & decimal yresolution
+ withpostscript data ;
+ )
+enddef ;