On 9/15/2018 7:50 AM, Henri Menke wrote:
Dear list,
I'm trying to add mathkerns to a font on the fly. I adapted the code
from ConTeXt in good-mth.lua but nothing happens. How can I make this
work? MWE below.
N.B. I'm using 1.09.0 svn6938 with Ulrike's fontloader 2018-09-01
Cheers, Henri
---
\input luaotfload.sty
\directlua{
function kern_right_fence(tfmdata)
if tfmdata.mathparameters then
local characters = tfmdata.characters
if characters[0x1D44E] then % we have at least an italic a
print("PATCHING FONT " .. tfmdata.psname)
characters[0x1D453].mathkerns = {
force = true,
bottomright = { { kern = 1000 } },
}
end
end
end
%
luatexbase.add_to_callback("luaotfload.patch_font",
kern_right_fence,
"kern right fence")
}
\font\lmmath="Latin Modern Math:script=math;" at 10pt
\textfont0=\lmmath
\Umathcodenum`e="1D452
\Umathcodenum`f="1D453
\Umathcodenum`g="1D454
$efg$
I don't know how the plugs in otfload work but it's more something like
characters[0x1D453].math =
{ kerns = { bottomright = { { kern = 1000 } } }
where of course you need to make sure that when there is already a math
table you add instead of replace; eventually that becomes something scaled
characters[0x1D453].mathkern.bottom_right = ...
don't confuse a higher level context interface with low level font
properties
Hans
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