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\setupbodyfont[dejavu]
\startluacode
fonts.handlers.otf.addfeature {
name = "chaintest",
type = "chainposition",
lookups = {
{
type = "pair",
data = {
A = { B = { { -30, 0, -50, 0 } } },
B = { C = { { -30, 0, -50, 0 } } },
},
},
{
type = "pair",
data = {
D = { E = { { -30, 0, -50, 0 } } },
},
},
},
data = {
rules = {
{
current = { { "A"}, { "B"}, { "C" }, { "D" }, { "E" }, { "F" } },
lookups = { false, false, false, 2 },
},
{
current = { { "A" }, { "B" }, { "C" } },
lookups = { 1, 1 },
},
},
}
}
\stopluacode
\starttext
\definecolor[tgray][s=.5,t=.5,a=1] \showfontkerns \showglyphs
\definefontfeature[chaintest] [mode=node,chaintest=yes]
\definedfont[file:dejavu-serif.ttf*chaintest @ 48pt]
\startTEXpage[offset=10pt,foregroundcolor=tgray]
ABCDEF
\stopTEXpage
\stoptext
|
