Yanrui Li wrote:
the cache option mentioned there is not meant for using, just for debugging
(i.e. for myself)
I have printed the the shared descriptions with the following code fragment:
function f4zhcn.pre_linebreak_filter (head, groupcode)
for t in node.traverse(head) do
if is_cjk_ideo (t) then
texio.write_nl ('*** CJK Ideo ***')
elseif is_cjk_puncts (t) then
texio.write_nl ('*** CJK Punct ***')
for k in pairs(font.fonts[t.font]) do
texio.write_nl (k)
end
end
end
return true
end
With "fontdata.cache = 'no'", I just got:
as we cache fonts at the lua end we don't want interference at the tex
end (not duplicate table creation); the no tells luatex not to manage a
cache at the tex end (i.e. no free not creation)
the "no" tells luatex not to keep a reference to the table it gets
passed and when you then use font.fonts it will recreate a table from
the data at the tex end and descriptions (and of course all other extra
that i create and manage at the lua end is not available)
at the lua end you can use fonts.ids[id] instead and then you will get a
descriptions (and leave the fontdata.cache key untouched unless you want
to waste memory and runtime)
Hans
ps. i will look into this bbox based compensation once we have a proper
set of guaranteed correct standard cjk fonts in tex live and i've
figured out a robust way to deal with it; i had code for it but threw it
away out when i ran into conflicts with opentype features that do
similar things and fonts that were inconsistent
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