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-rw-r--r--luaotfload.dtx24
1 files changed, 15 insertions, 9 deletions
diff --git a/luaotfload.dtx b/luaotfload.dtx
index eb77d46..77948ac 100644
--- a/luaotfload.dtx
+++ b/luaotfload.dtx
@@ -1181,6 +1181,7 @@ local luaotfload = luaotfload
config = config or { }
config.luaotfload = config.luaotfload or { }
config.luaotfload.resolver = config.luaotfload.resolver or "normal"
+config.luaotfload.definer = config.luaotfload.definer or "patch"
--luaotfload.prefer_merge = config.luaotfload.prefer_merge or true
luaotfload.module = {
@@ -1655,6 +1656,13 @@ create_callback("luaotfload.patch_font", "simple", dummy_function)
% How those work remains to be figured out.
%
% \begin{macrocode}
+--- font-con.lua:
+--- · constructors.assignmathparameters(target, original)
+--- · | .*Percent.* -> value
+--- | _ -> value * factor
+--- ... where factor = target.parameters.factor
+--- · writes new params to target
+
local define_font_wrapper = function (...)
--- we use “tfmdata” (not “fontdata”) for consistency with the
--- font loader
@@ -1664,17 +1672,13 @@ local define_font_wrapper = function (...)
local mathdata = metadata.math --- do all fonts have this field?
if mathdata then
local mathconstants = { } --- why new hash, not modify in place?
- local units_per_em = metadata.units_per_em
- local size = tfmdata.size
+ local factor = tfmdata.parameters.factor
for k,v in next, mathdata do
- --- afaics this is alread taken care of by
- --- definers.read
if stringfind(k, "Percent") then
-- keep percent values as is
- --print(k,v)
mathconstants[k] = v
else
- mathconstants[k] = v / units_per_em * size
+ mathconstants[k] = v * factor
end
end
--- for \overwithdelims
@@ -1716,17 +1720,19 @@ reset_callback("define_font")
%
% \begin{macrocode}
-if luaotfload.font_definer == "old" then
+local font_definer = config.luaotfload.definer
+
+if definer == "old" then
add_to_callback("define_font",
define_font_wrapper,
"luaotfload.define_font",
1)
-elseif luaotfload.font_definer == "generic" then
+elseif font_definer == "generic" then
add_to_callback("define_font",
fonts.definers.read,
"luaotfload.define_font",
1)
-elseif luaotfload.font_definer == "patch" then
+elseif font_definer == "patch" then
add_to_callback("define_font",
patch_defined_font,
"luaotfload.define_font",