Ok, understood. Thank you for the explanation.

Best wishes
Idris

--
Professor Idris Samawi Hamid
Department of Philosophy
Colorado State University
Fort Collins, CO 80523
On Aug 20, 2023, 9:45 AM -0600, Hans Hagen <j.hagen@xs4all.nl>, wrote:
** Caution: EXTERNAL Sender **

On 8/20/2023 5:33 PM, Hamid,Idris wrote:
Dear gang,

For \addfeature and the like, a virtual font feature defined in terms of a CLD local function behaves differently from other font features. MWE:

==============
\startluacode
local function squeeze(tfmdata)
for k, v in next, tfmdata.characters do
v.width = 1.75 * (v.height or 0)
v.depth = 1.75 * (v.depth or 0)
end
end

local specification = {
name = "sqtfm",
description = "test",
manipulators = {
base = squeeze,
node = squeeze,
}
}
because much more has to be done to satisfy the backend (liek advance
with and such) .. you cannot just change dimensions on the fly for
characters that could potentially be shared just as you can't change
glyph dimension mid document

Hans

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