On 9/30/2018 10:08 PM, Ulrike Fischer wrote:
The font Coelacanth (on CTAN) has glyphs in the private area.
Between 2/2017 (luaotfload in texlive 2017) and now the storing and
accessing of this glyphs has changed.
In the lua of the font of 2017 I find e.g.
[62860]={
["boundingbox"]=165,
["index"]=2622,
["unicode"]=62860,
["width"]=523,
and the glyph can be accessed with \Uchar62860
In the current lua I now find
[983910]={
["boundingbox"]=195,
["index"]=2622,
["unicode"]=62860,
["width"]=523,
},
and \Uchar62860 not longer works, one has to use \Uchar983910.
Is this change intentional? How is one supposed to access such
chars? The manual says about \Uchar that it "expands to the
associated Unicode character." but this seems no longer to be true.
A context example to test is
\starttext
\font\test={name:Coelacanth:mode=node;script=latn;language=DFLT;+tlig;}
\test
1.: \Uchar62860
2.: \Uchar983910
\stoptext
\Uchar expands to the character in the font, so to whatever sits in that
slot ... in fact, fonts in luatex are not that different from
traditional tex: slot 123 can be anything but it happens that we use
unicode in the fontloader ..
anyway, the problem, with these private areas is that they are also used
by the loader (and context) so in order to avoid clashes we move all
private chars in the font to a dedicated private range
in your case the glyphs have no real useful names so basically i wonder
what their use it (are they meant for direct access?)
you can define
\def\byindex#1{\ctxlua{
for k, v in pairs(fonts.hashes.identifiers[true].characters) do
if v.index == #1 then
tex.print(utf.char(k))
break
end
end
}}
{\definedfont[Coelacanth] test \byindex{\number"00A33}}
I can remap those privates to a normalized private name, like P0F581 but
it depends on how bloated fonts become that have lots of privates.
In that case you can have:
\def\byname#1{\ctxlua{
for k, v in
pairs(fonts.hashes.identifiers[true].shared.rawdata.descriptions) do
if v.name == "#1" then
tex.print(utf.char(k))
break
end
end
}}
{\definedfont[Coelacanth] test \byname {P0F581}}
(btw, This code is not for context users! They have other means; this
is typically stuff that differs per macro package. One might for
instance make a list per font with meaningfull names or so that can be
accessed in a more friendly way.)
Hans
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