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\input luaotfload.sty
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%% usage for glyph tests
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
\baselineskip=17.28pt
\font\iwonaregular=name:iwona at 14.4pt
\font\lmromanten=file:lmroman10-regular.otf at 14.4pt
\font\cmuregular=file:cmunrm.otf at 14.4pt
%% wrap tests in macros (could move to style file)
\def\doifglyphelse#1#2#3{%
\directlua{
local codepoint = tonumber('\string#1')
if not codepoint then codepoint = unicode.utf8.byte('\string#1') end
if luaotfload.aux.font_has_glyph(font.current(), codepoint) then
tex.sprint('\string#2')
else
tex.sprint('\string#3')
end
}%
}
\def\doifglyph#1#2{\doifglyphelse{#1}{#2}{}}
%% no otf font loaded yet, so both fail:
first:
\doifglyphelse{a}{true}{false}
\doifglyph {a}{yep}
%% load lm and try repeat:
\lmromanten
second:
\doifglyphelse{a}{true}{false}
\doifglyph {a}{yep}
%% let’s test some more free fonts
\def\checkglyphset{%
\doifglyphelse ö{ö}{nope}
\doifglyphelse п{п}{nope}
\doifglyphelse α{α}{nope}
\doifglyphelse Æ{Æ}{nope}
\doifglyphelse ą{ą}{nope}
\doifglyphelse ř{ř}{nope}
\doifglyphelse ˝{˝}{nope}
\doifglyphelse ѩ{ѩ}{nope}
\endgraf
}
\iwonaregular \checkglyphset
\lmromanten \checkglyphset
\cmuregular \checkglyphset
\bye
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