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Diffstat (limited to 'Master/texmf-dist/metapost/context/base/mp-spec.mp')
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diff --git a/Master/texmf-dist/metapost/context/base/mp-spec.mp b/Master/texmf-dist/metapost/context/base/mp-spec.mp new file mode 100644 index 00000000000..9fe3c724fdc --- /dev/null +++ b/Master/texmf-dist/metapost/context/base/mp-spec.mp @@ -0,0 +1,775 @@ +%D \module +%D [ file=mp-spec.mp, +%D version=1999.6.26, +%D title=\CONTEXT\ \METAPOST\ graphics, +%D subtitle=special extensions, +%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. + +% Spot colors are not handled by mptopdf ! + +% (r,g,b) => cmyk : r=123 g= 1 b=hash +% => spot : r=123 g= 2 b=hash +% => transparent rgb : r=123 g= 3 b=hash +% => transparent cmyk : r=123 g= 4 b=hash +% => transparent spot : r=123 g= 5 b=hash +% => rest : r=123 g=n>10 b=whatever + +%D This module is rather preliminary and subjected to +%D changes. Here we closely cooperates with the \METAPOST\ +%D to \PDF\ converter module built in \CONTEXT\ and provides +%D for instance shading. More information can be found in +%D type {supp-mpe.tex}. + +if unknown context_tool : input mp-tool ; fi ; +if known context_spec : endinput ; fi ; + +boolean context_spec ; context_spec := true ; + +numeric _special_counter_ ; _special_counter_ := 0 ; +numeric _color_counter_ ; _color_counter_ := 11 ; % < 10 reserved +numeric _special_signal_ ; _special_signal_ := 123 ; + +%D When set to \type {true}, shading will be supported. Some +%D day I will also write an additional directive. + +boolean _inline_specials_ ; _inline_specials_ := false ; + +%D Because we want to output only those specials that are +%D actually used in a figure, we need a bit complicated +%D bookkeeping and collection of specials. At the cost of some +%D obscurity, we now have rather efficient resources. + +string _global_specials_ ; _global_specials_ := "" ; +string _local_specials_ ; _local_specials_ := "" ; + +vardef add_special_signal = % write the version number + if (length _global_specials_>0) or (length _local_specials_ >0) : + special ("%%MetaPostSpecials: 1.0 " & decimal _special_signal_ ) ; + fi ; +enddef ; + +vardef add_extra_specials = + scantokens _global_specials_ ; + scantokens _local_specials_ ; +enddef ; + +vardef reset_extra_specials = + % only local ones + _local_specials_ := "" ; +enddef ; + +boolean insidefigure ; insidefigure := false ; + +% todo: alleen als special gebruikt flush + +extra_beginfig := + " insidefigure := true ; " & + " reset_extra_specials ; " & + extra_beginfig ; + +extra_endfig := + " add_special_signal ; " & + extra_endfig & + " add_extra_specials ; " & + " reset_extra_specials ; " & + " insidefigure := false ; " ; + +def set_extra_special (expr s) = + if insidefigure : + _local_specials_ := _local_specials_ & s ; + else : + _global_specials_ := _global_specials_ & s ; + fi +enddef ; + +def flush_special (expr typ, siz, dat) = + _special_counter_ := _special_counter_ + 1 ; + if _inline_specials_ : + set_extra_special + ( "special " + & "(" & ditto + & dat & " " + & decimal _special_counter_ & " " + & decimal typ & " " + & decimal siz + & " special" + & ditto & ");" ) ; + else : + set_extra_special + ( "special " + & "(" & ditto + & "%%MetaPostSpecial: " + & decimal siz & " " + & dat & " " + & decimal _special_counter_ & " " + & decimal typ + & ditto & ");" ) ; + fi ; +enddef ; + +%D The next hack is needed in case you use a version of +%D \METAPOST\ that does not provide you the means to configure +%D the buffer size. Patrick Gundlach suggested to use arrays +%D in this case. + +boolean bufferhack ; bufferhack := false ; % true ; + +if bufferhack : + + string _global_specials_[] ; numeric _nof_global_specials_ ; + string _local_specials_[] ; numeric _nof_local_specials_ ; + + _nof_global_specials_ := _nof_local_specials_ := 0 ; + + vardef add_special_signal = % write the version number + if (_nof_global_specials_>0) or (_nof_local_specials_>0) : + special ("%%MetaPostSpecials: 1.0 " & decimal _special_signal_ ) ; + fi ; + enddef ; + + vardef add_extra_specials = + for i=1 upto _nof_global_specials_ : + scantokens _global_specials_[i] ; + endfor; + for i=1 upto _nof_local_specials_ : + scantokens _local_specials_[i] ; + endfor; + enddef ; + + vardef reset_extra_specials = + string _local_specials_[] ; _nof_local_specials_ := 0 ; + enddef ; + + def set_extra_special (expr s) = + if insidefigure : + _local_specials_[incr(_nof_local_specials_)] := s ; + else : + _global_specials_[incr(_nof_global_specials_)] := s ; + fi + enddef ; + +fi ; + +%D So far for this hack. + +%D Shade allocation. + +newinternal shadefactor ; shadefactor := 1 ; + +pair shadeoffset ; shadeoffset := origin ; + +vardef define_linear_shade (expr a, b, ca, cb) = + flush_special(30, 15, "0 1 " & decimal shadefactor & " " & + dddecimal ca & " " & ddecimal (a shifted shadeoffset) & " " & + dddecimal cb & " " & ddecimal (b shifted shadeoffset) ) ; + _special_counter_ +enddef ; + +vardef define_circular_shade (expr a, b, ra, rb, ca, cb) = + flush_special(31, 17, "0 1 " & decimal shadefactor & " " & + dddecimal ca & " " & ddecimal (a shifted shadeoffset) & " " & decimal ra & " " & + dddecimal cb & " " & ddecimal (b shifted shadeoffset) & " " & decimal rb ) ; + _special_counter_ +enddef ; + +%D A few predefined shading macros. + +boolean trace_shades ; trace_shades := false ; + +% if (n=1) : a := llcorner p ; b := urcorner p ; +% elseif (n=2) : a := llcorner p ; b := ulcorner p ; +% elseif (n=3) : a := lrcorner p ; b := ulcorner p ; +% else : a := llcorner p ; b := lrcorner p ; +% fi ; + +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 linear_shade (expr p, n, ca, cb) = + begingroup ; + save a, b, sh ; pair a, b ; + set_linear_vector(a,b)(p,n) ; + fill p withshade define_linear_shade (a,b,ca,cb) ; + if trace_shades : + drawarrow a -- b withpen pencircle scaled 1pt ; + fi ; + endgroup ; +enddef ; + +vardef predefined_linear_shade (expr p, n, ca, cb) = + save a, b, sh ; pair a, b ; + set_linear_vector(a,b)(p,n) ; + set_shade_vector(a,b)(p,n) ; + define_linear_shade (a,b,ca,cb) +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 withshade define_circular_shade(ab,ab,0,r,ca,cb) ; + if trace_shades : + drawarrow ab -- ab shifted (0,r) withpen pencircle scaled 1pt ; + fi ; + endgroup ; +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 ; + +%D Since a \type {fill p withshade s} syntax looks better +%D than some macro, we implement a new primary. + +primarydef p withshade sc = % == p withcolor shadecolor(sh) + hide (_color_counter_ := _color_counter_ + 1) + p withcolor (_special_signal_/1000,_color_counter_/1000,sc/1000) +enddef ; + +vardef shadecolor(expr sc) = + hide (_color_counter_ := _color_counter_ + 1) + (_special_signal_/1000,_color_counter_/1000,sc/1000) +enddef ; + +%D Figure inclusion. + +%numeric cef ; cef := 0 ; + +def externalfigure primary filename = + doexternalfigure (filename) +enddef ; + +def doexternalfigure (expr filename) text transformation = + begingroup ; save p, t ; picture p ; transform t ; + p := nullpicture ; t := identity transformation ; + flush_special(10, 9, + dddecimal (xxpart t, yxpart t, xypart t) & " " & + dddecimal (yypart t, xpart t, ypart t) & " " & filename) ; + addto p contour unitsquare scaled 0 ; + setbounds p to unitsquare transformed t ; + _color_counter_ := _color_counter_ + 1 ; + draw p withcolor (_special_signal_/1000,_color_counter_/1000,_special_counter_/1000) ; +%draw p withcolor (_special_signal_/1000,cef/1000,_special_counter_/1000) ; + endgroup ; +enddef ; + +%D Experimental: + +%numeric currenthyperlink ; currenthyperlink := 0 ; + +def hyperlink primary t = dohyperlink(t) enddef ; +def hyperpath primary t = dohyperpath(t) enddef ; + +def dohyperlink (expr destination) text transformation = + begingroup ; save somepath ; path somepath ; + somepath := fullsquare transformation ; + dohyperpath(destination) somepath ; + endgroup ; +enddef ; + +def dohyperpath (expr destination) expr somepath = + begingroup ; + flush_special(20, 7, + ddecimal (xpart llcorner somepath, ypart llcorner somepath) & " " & + ddecimal (xpart urcorner somepath, ypart urcorner somepath) & " " & destination) ; +% currenthyperlink := currenthyperlink + 1 ; + _color_counter_ := _color_counter_ + 1 ; + fill boundingbox unitsquare scaled 0 withcolor + (_special_signal_/1000,_color_counter_/1000,_special_counter_/1000) ; +% (_special_signal_/1000,currenthyperlink/1000,_special_counter_/1000) ; + endgroup ; +enddef ; + +% \setupinteraction[state=start] +% \setupcolors [state=start] +% +% Hello There! \blank +% +% \startMPcode +% pickup pencircle scaled 5 ; +% draw fullcircle scaled 4cm withcolor red ; +% hyperpath "nextpage" boundingbox currentpicture ; +% draw origin withcolor blue ; +% \stopMPcode +% +% \blank Does it work or not? +% +% \startMPcode +% pickup pencircle scaled 5 ; +% draw fullcircle scaled 4cm withcolor red ; +% hyperpath "nextpage" fullcircle scaled 4cm ; +% draw origin withcolor blue ; +% draw fullcircle scaled 4cm shifted (1cm,1cm); +% \stopMPcode +% +% \blank Does it work or not? \page Hello There! \blank +% +% \startMPcode +% pickup pencircle scaled 5 ; +% draw fullcircle scaled 2cm shifted (-2cm,-1cm) ; +% draw fullcircle scaled 3cm shifted (2cm,1cm) withcolor red ; +% draw fullcircle scaled 1cm ; +% hyperlink "previouspage" scaled 3cm shifted (2cm,1cm) ; +% draw origin withcolor blue ; +% \stopMPcode +% +% \blank Does it work or not? + +_cmyk_counter_ := 0 ; + +extra_endfig := " resetcmykcolors ; " & extra_endfig ; + +def resetcmykcolors = + numeric cmykcolorhash[][][][] ; +enddef ; + +resetcmykcolors ; boolean cmykcolors ; cmykcolors := false ; % true + +string cmykcolorpattern[] ; % needed for transparancies + +vardef cmyk(expr c,m,y,k) = + if cmykcolors : + save ok ; boolean ok ; + if unknown cmykcolorhash[c][m][y][k] : + ok := false ; % not yet defined + elseif cmykcolorhash[c][m][y][k] = -1 : + ok := false ; % locally defined and undefined + else : + ok := true ; % globally already defined + fi ; + if not ok : + save s ; string s ; s := dddecimal (c,m,y) & " " & decimal k ; + _cmyk_counter_ := _cmyk_counter_ + 1 ; + cmykcolorpattern[_cmyk_counter_/1000] := s ; + cmykcolorhash[c][m][y][k] := _cmyk_counter_ ; + flush_special(1, 7, decimal _cmyk_counter_ & " " & s) ; + _local_specials_ := _local_specials_ & + " cmykcolorhash[" & decimal c & "][" & decimal m & + "][" & decimal y & "][" & decimal k & "] := -1 ; " ; + fi ; + (_special_signal_/1000,1/1000,cmykcolorhash[c][m][y][k]/1000) + else : + (1-c-k,1-m-k,1-y-k) + fi +enddef ; + +% newcolor truecyan, truemagenta, trueyellow ; +% +% truecyan = cmyk (1,0,0,0) ; +% truemagenta = cmyk (0,1,0,0) ; +% trueyellow = cmyk (0,0,1,0) ; + +%D Spot colors + +_spotcolor_counter_ := 0 ; +_spotcolor_number_ := 0 ; + +extra_endfig := " resetspotcolors ; " & extra_endfig ; + +def resetspotcolors = + numeric spotcolorhash[][] ; +enddef ; + +resetspotcolors ; boolean spotcolors ; spotcolors := false ; % true + +string spotcolorpattern[] ; % needed for transparancies + +% vardef spotcolor(expr p, s) = +% if spotcolors : +% save ok, pc_tag ; boolean ok ; string pc_tag ; +% pc_tag := "_pct_"&p ; +% if not unstringed(pc_tag) : +% _spotcolor_number_ := _spotcolor_number_ + 1 ; +% setunstringed(pc_tag,_spotcolor_number_) ; +% fi ; +% pp := getunstringed(pc_tag) ; +% if unknown spotcolorhash[pp][s] : +% ok := false ; % not yet defined +% elseif spotcolorhash[pp][s] = -1 : +% ok := false ; % locally defined and undefined +% else : +% ok := true ; % globally already defined +% fi ; +% if not ok : +% save ss ; string ss ; ss := p & " " & decimal s ; +% _spotcolor_counter_ := _spotcolor_counter_ + 1 ; +% spotcolorpattern[_spotcolor_counter_/1000] := ss ; +% spotcolorhash[pp][s] := _spotcolor_counter_ ; +% flush_special(2, 5, decimal _spotcolor_counter_ & " " & ss) ; +% _local_specials_ := _local_specials_ & +% "spotcolorhash["&decimal pp&"]["&decimal s&"]:=-1;" ; +% fi ; +% (_special_signal_/1000,2/1000,spotcolorhash[pp][s]/1000) +% else : +% (1-s,1-s,1-s) +% fi +% enddef ; + +% vardef spotcolor(expr p, s) = +% if spotcolors : +% save ok, pc_tag ; boolean ok ; string pc_tag ; +% pc_tag := "_pct_"&p ; +% if not unstringed(pc_tag) : +% _spotcolor_number_ := _spotcolor_number_ + 1 ; +% setunstringed(pc_tag,_spotcolor_number_) ; +% fi ; +% pp := getunstringed(pc_tag) ; +% if unknown spotcolorhash[pp][s] : +% ok := false ; % not yet defined +% elseif spotcolorhash[pp][s] = -1 : +% ok := false ; % locally defined and undefined +% else : +% ok := true ; % globally already defined +% fi ; +% if not ok : +% save ss ; string ss ; ss := p & " " & decimal s ; +% _spotcolor_counter_ := _spotcolor_counter_ + 1 ; +% spotcolorpattern[_spotcolor_counter_/1000] := ss ; +% spotcolorhash[pp][s] := _spotcolor_counter_ ; +% flush_special(2, 5, decimal _spotcolor_counter_ & " " & ss) ; +% _local_specials_ := _local_specials_ & +% "spotcolorhash["&decimal pp&"]["&decimal s&"]:=-1;" ; +% fi ; +% (_special_signal_/1000,2/1000,spotcolorhash[pp][s]/1000) +% else : +% (1-s,1-s,1-s) +% fi +% enddef ; + +vardef spotcolor(expr p, s) = + multitonecolor(p, 1, "", decimal s) +enddef ; + +vardef multitonecolor(expr n, f, d, p) = % name fractions names factors + if spotcolors : + save ok, pc_tag ; boolean ok ; string pc_tag ; + pc_tag := "_pct_" & n ; + if not unstringed(pc_tag) : + _spotcolor_number_ := _spotcolor_number_ + 1 ; + setunstringed(pc_tag,_spotcolor_number_) ; + fi ; + pp := getunstringed(pc_tag) ; + pc_tag := "_pct_"& decimal f & "_" & if d = "" : n else : d fi & "_" & p ; % check for d empty + if not unstringed(pc_tag) : + _spotcolor_number_ := _spotcolor_number_ + 1 ; + setunstringed(pc_tag,_spotcolor_number_) ; + fi ; + ps := getunstringed(pc_tag) ; + if unknown spotcolorhash[pp][ps] : + ok := false ; % not yet defined + elseif spotcolorhash[pp][ps] = -1 : + ok := false ; % locally defined and undefined + else : + ok := true ; % globally already defined + fi ; + if not ok : + save ss ; string ss ; ss := n & " " & decimal f & " " & if d = "" : n else : d fi & " " & p ; + _spotcolor_counter_ := _spotcolor_counter_ + 1 ; + spotcolorpattern[_spotcolor_counter_/1000] := ss ; + spotcolorhash[pp][ps] := _spotcolor_counter_ ; + flush_special(2, 7, decimal _spotcolor_counter_ & " " & ss) ; + _local_specials_ := _local_specials_ & + "spotcolorhash["&decimal pp&"]["&decimal ps&"]:=-1;" ; + fi ; + (_special_signal_/1000,2/1000,spotcolorhash[pp][ps]/1000) + else : + .5white + fi +enddef ; + +%D Transparency + +normaltransparent := 1 ; multiplytransparent := 2 ; +screentransparent := 3 ; overlaytransparent := 4 ; +softlighttransparent := 5 ; hardlighttransparent := 6 ; +colordodgetransparent := 7 ; colorburntransparent := 8 ; +darkentransparent := 9 ; lightentransparent := 10 ; +differencetransparent := 11 ; exclusiontransparent := 12 ; + +% nottransparent := 0 ; +% compatibletransparent := 99 ; + +% fill fullcircle scaled 10cm withcolor transparant(.8,3,color) ; + +% vardef transparent(expr n, t, c) = +% save s, ss, nn, cc, is_cmyk, is_spot, ok ; +% string s, ss ; numeric nn ; color cc ; boolean is_cmyk, is_spot, ok ; +% % transparancy type +% if string n : +% if expandafter known scantokens(n&"transparent") : +% nn := scantokens(n&"transparent") ; +% else : +% nn := 0 ; +% fi +% else : % nn := min(n,13) +% nn := if n<13 : n else : nn := 0 fi ; +% fi ; +% % we need to expand the color (can be cmyk(..) or predefined) +% cc := c ; % expand color +% % check for cmyk special +% is_cmyk := (redpart cc = _special_signal_/1000) +% and (greenpart cc = 1/1000) ; +% is_spot := (redpart cc = _special_signal_/1000) +% and (greenpart cc = 2/1000) ; +% % build special string, fetch cmyk components +% s := decimal nn & " " & decimal t & " " & +% if is_cmyk : cmykcolorpattern[bluepart cc] +% elseif is_spot : spotcolorpattern[bluepart cc] +% else : dddecimal cc fi ; +% % check if this one is already used +% ss := "tr_" & s ; +% % efficiency hack +% if expandafter unknown scantokens(ss) : +% ok := false ; % not yet defined +% elseif scantokens(ss) < 0 : +% ok := false ; % locally defined and undefined +% else : +% ok := true ; % globally already defined +% fi ; +% if not ok : +% if is_spot : +% flush_special(5, 6, s) ; +% elseif is_cmyk : +% flush_special(4, 8, s) ; +% else : +% flush_special(3, 7, s) ; +% fi ; +% scantokens(ss) := _special_counter_ ; +% _local_specials_ := _local_specials_ & +% "scantokens(" & ditto & ss & ditto & ") := -1 ;" ; +% fi ; +% % go ahead +% if is_spot : +% (_special_signal_/1000,5/1000,scantokens(ss)/1000) +% elseif is_cmyk : +% (_special_signal_/1000,4/1000,scantokens(ss)/1000) +% else : +% (_special_signal_/1000,3/1000,scantokens(ss)/1000) +% fi +% enddef ; + +vardef transparent(expr n, t, c) = + save s, ss, nn, cc, is_cmyk, is_spot, ok ; + string s, ss ; numeric nn ; color cc ; boolean is_cmyk, is_spot, ok ; + % transparancy type + if string n : + if expandafter known scantokens(n&"transparent") : + nn := scantokens(n&"transparent") ; + else : + nn := 0 ; + fi + else : % nn := min(n,13) + nn := if n<13 : n else : nn := 0 fi ; + fi ; + % we need to expand the color (can be cmyk(..) or predefined) + cc := c ; % expand color + % check for cmyk special + is_cmyk := (redpart cc = _special_signal_/1000) + and (greenpart cc = 1/1000) ; + is_spot := (redpart cc = _special_signal_/1000) + and (greenpart cc = 2/1000) ; + % build special string, fetch cmyk components + s := decimal nn & " " & decimal t & " " & + if is_cmyk : cmykcolorpattern[bluepart cc] + elseif is_spot : spotcolorpattern[bluepart cc] + else : dddecimal cc fi ; + % check if this one is already used + ss := cleanstring("tr_" & s) ; + % we now have rather unique names, i.e. a color spec of .234 becomes + % tr..._234.... and metapost gives a number overflow (parse error) + % for variables like tr_12345678 which may result from many decimal + % positions (imo mp bug) + ss := asciistring(ss) ; + % efficiency hack + if expandafter unknown scantokens(ss) : + ok := false ; % not yet defined + elseif scantokens(ss) < 0 : + ok := false ; % locally defined and undefined + else : + ok := true ; % globally already defined + fi ; + if not ok : + if is_spot : + flush_special(5, 8, s) ; + elseif is_cmyk : + flush_special(4, 8, s) ; + else : + flush_special(3, 7, s) ; + fi ; + scantokens(ss) := _special_counter_ ; + _local_specials_ := _local_specials_ & + "scantokens(" & ditto & ss & ditto & ") := -1 ;" ; + fi ; + % go ahead + if is_spot : + (_special_signal_/1000,5/1000,scantokens(ss)/1000) + elseif is_cmyk : + (_special_signal_/1000,4/1000,scantokens(ss)/1000) + else : + (_special_signal_/1000,3/1000,scantokens(ss)/1000) + fi +enddef ; + +%D This function returns true of false, dependent on transparency. + +vardef is_transparent(text t) = + begingroup ; save transparent ; save _c_, _b_ ; + vardef transparent(expr nn, tt, cc) = _b_ := true ; cc enddef ; + boolean _b_ ; _b_ := false ; + color _c_ ; _c_ := t ; _b_ + endgroup +enddef ; + +%D This function returns the not transparent color. + +vardef not_transparent(text t) = + begingroup ; save transparent ; + vardef transparent(expr nn, tt, cc) = cc enddef ; + t endgroup +enddef ; + +%D Basic position tracking: + +def register (expr label, width, height, offset) = + begingroup ; + flush_special(50, 7, + ddecimal offset & " " & + decimal width & " " & + decimal height & " " & label) ; + endgroup ; +enddef ; + +%D We cannot scale cmyk colors directly since this spoils +%D the trigger signal (such colors are no real colors). + +vardef scaledcmyk(expr c,m,y,k,sf) = + cmyk(sf*c,sf*m,sf*y,sf*k) +enddef ; + +vardef scaledcmykasrgb(expr c,m,y,k,sf) = + (sf*(1-c-k,1-m-k,1-y-k)) +enddef ; + +vardef scaledrgbascmyk(expr c,m,y,k,sf) = + scaledcmyk(1-c,1-m,1-y,0,sf) +enddef ; + +vardef scaledrgb(expr r,g,b,sf) = + (sf*(r,g,b)) +enddef ; + +vardef scaledgray(expr s,sf) = + (sf*(s,s,s)) +enddef ; + +% spotcolor is already scaled + +endinput ; + +% just an exercise (due to a question by Chof on the context mailing list); scaling of +% 'special' colors is not possible and the next solution is incomplete (spot colors, +% transparency, etc); watch the the tricky chained macro construction + +% vardef normalgray(expr s ) = (s,s,s) enddef ; +% vardef normalrgb (expr r,g,b ) = (r,g,b) enddef ; +% vardef normalcmyk(expr c,m,y,k) = if cmykcolors : save ok ; boolean ok ; if unknown cmykcolorhash[c][m][y][k] : ok := false ; elseif cmykcolorhash[c][m][y][k] = -1 : ok := false ; else : ok := true ; fi ; if not ok : save s ; string s ; s := dddecimal (c,m,y) & " " & decimal k ; _cmyk_counter_ := _cmyk_counter_ + 1 ; cmykcolorpattern[_cmyk_counter_/1000] := s ; cmykcolorhash[c][m][y][k] := _cmyk_counter_ ; flush_special(1, 7, decimal _cmyk_counter_ & " " & s) ; _local_specials_ := _local_specials_ & " cmykcolorhash[" & decimal c & "][" & decimal m & "][" & decimal y & "][" & decimal k & "] := -1 ; " ; fi ; (_special_signal_/1000,1/1000,cmykcolorhash[c][m][y][k]/1000) else : (1-c-k,1-m-k,1-y-k) fi enddef ; + +% vardef gray(expr s) = normalgray(s ) enddef ; +% vardef rgb (expr r,g,b) = normalrgb (r,g,b ) enddef ; +% vardef cmyk(expr c,m,y,k) = normalcmyk(c,m,y,k) enddef ; + +% numeric _scaled_color_t_ ; +% color _scaled_color_c_ ; + +% def withscaledcolor = +% hide ( +% _scaled_color_t_ := 0 ; % direct +% def gray(expr s) = +% hide ( +% _gray_s_ := s ; +% _scaled_color_t_ := 1; % gray +% ) +% 0 +% enddef ; +% def rgb (expr r,g,b) = +% hide ( +% _rgb_r_ := r ; _rgb_g_ := g ; _rgb_b_ := b ; +% _scaled_color_t_ := 2 ; % rgb +% ) +% 0 +% enddef ; +% def cmyk (expr c,m,y,k) = +% hide ( +% _cmyk_c_ := c ; _cmyk_m_ := m ; _cmyk_y_ := y ; _cmyk_k_ := k ; +% _scaled_color_t_ := 3 ; % cmyk +% ) +% 0 +% enddef ; ) +% dowithscaledcolor +% enddef ; + +% def dowithscaledcolor expr t = +% hide ( +% if color t : _scaled_color_c_ := t fi ; +% vardef gray(expr s) = normalgray(s) enddef ; +% vardef rgb (expr r,g,b) = normalrgb (r,g,b) enddef ; +% vardef cmyk(expr c,m,y,k) = normalcmyk(c,m,y,k) enddef ; +% ) +% enddef ; + +% def by expr s = +% if _scaled_color_t_ = 0 : +% withcolor s*_scaled_color_c_ +% elseif _scaled_color_t_ = 1 : +% withcolor gray(s*_gray_s_) +% elseif _scaled_color_t_ = 2 : +% withcolor rgb (s*_rgb_r_, s*_rgb_g_, s*_rgb_b_) +% elseif _scaled_color_t_ = 3 : +% withcolor cmyk(s*_cmyk_c_, s*_cmyk_m_, s*_cmyk_y_, s*_cmyk_k_) +% fi +% enddef ; + +% fill fullcircle scaled 10cm withscaledcolor cmyk(0,0,1,0) by .5 ; +% fill fullcircle scaled 8cm withscaledcolor rgb (0,0,1) by .5 ; +% fill fullcircle scaled 6cm withscaledcolor gray(1) by .5 ; +% fill fullcircle scaled 4cm withscaledcolor (0,1,0) by .5 ; |