> On 24 Dec 2021, at 18:34, Thomas Savary via ntg-context <ntg-context@ntg.nl>
> wrote:
>
> Hello, dear list !
>
> In order to fix a few bugs in some OpenType features included in EB Garamond
> font provided by Google Fonts, I am trying to remove some ligatures
> (erroneous in some contexts) with fonts.handlers.otf.addfeature.
>
> I must be missing something, because I can't get it to work.
>
> Here is a minimal —non working—example :-)
> (The attempted removal (“f_i” → “fi” only before “o”) is of course
> irrelevant. I chose it just for the sole purpose of this test, to provide a
> simple example. What I am trying to achieve is more complex, with other
> ligatures.)
>
> fonts.handlers.otf.addfeature{
> name = "unfio",
> type = "chainsubstitution",
> lookups = {
> { type = "multiple",
> data = { [ "f_i" ] = { "f", "i" } }
> }
> }
> rules = {
> { after = { { "o" } },
> current = { { "f_i" } },
> lookups = { 1 } }
> }
> }
> }
>
> Could someone please explain to me what I did wrong ?
Firstly, you have an extra } in the example above.
Secondly, rules need to come inside a data section. Thus (untested):
fonts.handlers.otf.addfeature{
name = "unfio",
type = "chainsubstitution",
lookups = {
{
type = "substitution",
data = {
[ "f_i" ] = { "f", "i" }
}
}
},
data = {
rules = {
{
after = { { "o" } },
current = { { "f_i" } },
lookups = { 1 }
}
}
}
}
Regards,
—
Bruce Horrocks
Hampshire, UK
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