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-- Bah, I really hate these patches especially because one needs to make
-- sure that they are still valid when the font gets updated. So, let's
-- do it runtime (not in the cached copy) and issue a warning every run.
-- As we cannot rely on version numbers (if we have more patches) we
-- check for values instead.
--
-- This font also has inconsistent italics in smalelr sizes which we can
-- fix in a more general way but I'm not sure if we want that.
local function fix_italic(target,original,name,value,factor)
local m = target.parameters.mathsize
local u = original.resources.unicodes[name]
if m and u then
local c = target.characters[u]
if c then
local i = c.italic
if i then
local d = original.descriptions[u]
if d and d.math.italic == value then
if m then
logs.report("patching font","fixing italic correction of %U at math size %i by %0.3f",u,m,factor)
c.italic = factor * i
end
end
end
end
end
end
return {
name = "stix-two-math",
version = "1.00",
comment = "Goodies that complement stix two opentype.",
author = "Hans Hagen",
copyright = "ConTeXt development team",
mathematics = {
-- these tags are suggestions and can still change
alternates = {
calligraphic = { feature = 'ss01', value = 1, comment = "Mathematical Alternative Calligraphic Characters" },
italic = { feature = 'ss02', value = 1, comment = "Mathematical Alternative Lowercase Italic" },
barred = { feature = 'ss03', value = 1, comment = "Mathematical Alternative Barred Characters" }, -- hbar, lambdabar etc
primes = { feature = 'ss04', value = 1, comment = "Mathematical Alternative Primes" }, -- larger/lower primes, minute etc
arrow = { feature = 'ss05', value = 1, comment = "Mathematical Alternative Smaller Arrows" },
narrower = { feature = 'ss06', value = 1, comment = "Mathematical Alternative Narrower Elements" }, -- narrower/shorter element etc
small = { feature = 'ss07', value = 1, comment = "Mathematical Alternative Smaller Operators" },
upright = { feature = 'ss08', value = 1, comment = "Mathematical Alternative Upright Symbols" }, -- upright integrals etc.
negated = { feature = 'ss09', value = 1, comment = "Mathematical Alternative Negated Symbols" },
relation = { feature = 'ss10', value = 1, comment = "Mathematical Alternative Relations" },
negatedset = { feature = 'ss09', value = 1, comment = "Mathematical Alternative Negated Set Symbols" },
-- todo = { feature = 'ss14', value = 1, comment = "" },
circled = { feature = 'ss16', value = 1, comment = "Mathematical Alternative Circled Operators" },
},
tweaks = {
aftercopying = {
function(target,original)
fix_italic(target,original,"uni222B.updsp",80,3)
end,
},
},
},
}
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