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%D \module
%D [ file=meta-imp-demo,
%D version=2021.01.21,
%D title=\METAPOST\ Graphics,
%D subtitle=Demo Font,
%D author=Hans Hagen,
%D date=\currentdate,
%D copyright={PRAGMA ADE \& \CONTEXT\ Development Team}]
%C
%C This module is part of the \CONTEXT\ macro||package and is
%C therefore copyrighted by \PRAGMA. See mreadme.pdf for
%C details.
%D This is just a demo of defining a font in \METAPOST. The rendering as well as definitions
%D are delayed till we actually need the glyph.
\startMPcalculation{simplefun}
picture DemoSnippets[];
vardef DemoCircle = image(fill fullcircle scaled 10 ;) enddef ;
vardef DemoCenter = image(fill fullcircle scaled 3 ;) enddef ;
vardef DemoLeft = image(fill fullcircle scaled 3 shifted (-5, 0) ;) enddef ;
vardef DemoRight = image(fill fullcircle scaled 3 shifted ( 5, 0) ;) enddef ;
vardef DemoUp = image(fill fullcircle scaled 3 shifted ( 0, 5) ;) enddef ;
vardef DemoDown = image(fill fullcircle scaled 3 shifted ( 0,-5) ;) enddef ;
vardef DemoLowerLeft = image(fill fullcircle scaled 3 shifted (-5,-5) ;) enddef ;
vardef DemoLowerRight = image(fill fullcircle scaled 3 shifted ( 5,-5) ;) enddef ;
vardef DemoUpperRight = image(fill fullcircle scaled 3 shifted ( 5, 5) ;) enddef ;
vardef DemoUpperLeft = image(fill fullcircle scaled 3 shifted (-5, 5) ;) enddef ;
vardef DemoGlyph =
composeglyph(DemoSnippets) ;
enddef ;
lmt_registerglyphs [
name = "demo",
units = 10,
width = 10,
height = 10,
depth = 0,
] ;
% we need to set up some basics (signals to the backend and such) at definition
% time so we just force a bogus shape (zero)
lmt_registerglyph [
category = "demo",
] ;
\stopMPcalculation
\startluacode
metapost.metafonts.demo = {
[utf.byte("g")] = {
code = "DemoGlyph",
shapes = {
{ shape = "DemoCircle", color = "gray" },
{ shape = "DemoLeft", color = "cyan" },
{ shape = "DemoUp", color = "magenta" },
{ shape = "DemoCenter", color = "yellow" },
}
},
[utf.byte("h")] = {
code = "DemoGlyph",
shapes = {
{ shape = "DemoCircle", color = "gray" },
{ shape = "DemoRight", color = "red" },
{ shape = "DemoDown", color = "green" },
{ shape = "DemoCenter", color = "blue" },
}
},
[19] = {
code = "DemoGlyph",
shapes = {
{ shape = "DemoCircle", color = "gray" },
{ shape = "DemoUp", color = "darkgray" },
{ shape = "DemoDown", color = "darkgray" },
{ shape = "DemoLeft", color = "darkgray" },
{ shape = "DemoRight", color = "darkgray" },
{ shape = "DemoCenter", color = "darkgray" },
}
},
["weirdsymbol"] = {
code = "DemoGlyph",
shapes = {
{ shape = "DemoCircle", color = "middlegray" },
{ shape = "DemoUp", color = "red" },
{ shape = "DemoDown", color = "green" },
{ shape = "DemoLeft", color = "blue" },
{ shape = "DemoRight", color = "magenta" },
{ shape = "DemoCenter", color = "yellow" },
}
},
["weirdersymbol"] = {
code = "DemoGlyph",
shapes = {
-- { shape = "DemoCircle", color = "gray" },
{ shape = "DemoCenter", color = "darkgray" },
{ shape = "DemoLowerLeft", color = "red" },
{ shape = "DemoLowerRight", color = "green" },
{ shape = "DemoUpperRight", color = "blue" },
{ shape = "DemoUpperLeft", color = "yellow" },
{ shape = "DemoUp", color = "darkred" },
{ shape = "DemoDown", color = "darkgreen" },
{ shape = "DemoLeft", color = "darkblue" },
{ shape = "DemoRight", color = "darkmagenta" },
}
}
}
\stopluacode
\continueifinputfile{meta-imp-demo.mkxl}
\setuplayout[tight]
\setupbodyfont[dejavu]
\definefontfeature[demo][metapost=demo,metafont=demo]
\definefont[DemoA][Serif*demo]
\definefont[DemoB][Serif*demo sa .5]
\definefont[DemoC][Serif*demo sa .25]
\starttext
\startbuffer
x\ruledhbox{gh}%
x\ruledhbox{\char19}%
x\privatecharacter{weirdsymbol}%
x\privatecharacter{weirdersymbol}%
x%
\stopbuffer
\startTEXpage[offset=2pt]
\DemoA\getbuffer\par
\DemoB\getbuffer\quad\DemoC\getbuffer\par
\stopTEXpage
{\DemoA\ctxlua{fonts.helpers.setmetaglyph {
category = "demo",
name = "whatever",
code = "DemoGlyph",
shapes = {
{ shape = "DemoCenter", color = "darkgray" },
{ shape = "DemoLowerLeft", color = "darkred" },
{ shape = "DemoLowerRight", color = "darkgreen" },
{ shape = "DemoUpperRight", color = "darkblue" },
{ shape = "DemoUpperLeft", color = "darkyellow" },
{ shape = "DemoUp", color = "red" },
{ shape = "DemoDown", color = "green" },
{ shape = "DemoLeft", color = "blue" },
{ shape = "DemoRight", color = "magenta" },
}
}}}
{\DemoA\setmetaglyph {
category {demo}
name {forever}
code {DemoGlyph}
shapes {
{ shape {DemoCenter} color {middlegray} }
{ shape {DemoLowerLeft} color {darkgray} }
{ shape {DemoLowerRight} color {darkgray} }
{ shape {DemoUpperRight} color {darkgray} }
{ shape {DemoUpperLeft} color {darkgray} }
{ shape {DemoUp} color {lightgray} }
{ shape {DemoDown} color {lightgray} }
{ shape {DemoLeft} color {lightgray} }
{ shape {DemoRight} color {lightgray} }
}
}}
\startTEXpage[offset=2pt]
\DemoA
\privatecharacter{whatever}
\privatecharacter{forever}
\stopTEXpage
\DemoA\setupinterlinespace \dorecurse{10}{\dorecurse{1000}{g h }\par}\page
\DemoB\setupinterlinespace \dorecurse{20}{\dorecurse{1000}{g h }\par}\page
\DemoC\setupinterlinespace \dorecurse{30}{\dorecurse{1000}{g h }\par}\page
\unexpanded\def\MyChar#1%
{\begingroup
\DemoA
\iffontchar\font\privatecharactercode{forever-#1}\else
\setmetaglyph {
category {demo}
name {forever-#1}
code {DemoGlyph}
shapes {
{ shape {DemoCenter} color {middlegray} }
{ shape {DemoLowerLeft} color {dark#1} }
{ shape {DemoLowerRight} color {dark#1} }
{ shape {DemoUpperRight} color {dark#1} }
{ shape {DemoUpperLeft} color {dark#1} }
{ shape {DemoUp} color {light#1} }
{ shape {DemoDown} color {light#1} }
{ shape {DemoLeft} color {light#1} }
{ shape {DemoRight} color {light#1} }
}
}%
\fi
\privatecharacter{forever-#1}%
\endgroup}
\dontcomplain
\dorecurse{1000}{%
\MyChar{red}\space
\MyChar{green}\space
\MyChar{blue}\space
\MyChar{yellow}\space
}
\page
\start
\glyphxscale 1200
\glyphyscale 800
\dorecurse{1000}{%
\MyChar{red}\allowbreak
\MyChar{green}\allowbreak
\MyChar{blue}\allowbreak
\MyChar{yellow}\allowbreak
}
\stop
\stoptext
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