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-rw-r--r--tex/context/base/mkiv/font-otr.lua19
1 files changed, 19 insertions, 0 deletions
diff --git a/tex/context/base/mkiv/font-otr.lua b/tex/context/base/mkiv/font-otr.lua
index 5839cbfb5..1fc338b38 100644
--- a/tex/context/base/mkiv/font-otr.lua
+++ b/tex/context/base/mkiv/font-otr.lua
@@ -2122,6 +2122,25 @@ function readers.compact(fontdata)
report("the %a helper is not yet implemented","compact")
end
+-- plug in
+
+local extenders = { }
+
+function readers.registerextender(extender)
+ extenders[#extenders+1] = extender
+end
+
+function readers.extend(fontdata)
+ for i=1,#extenders do
+ local extender = extenders[i]
+ local name = extender.name or "unknown"
+ local action = extender.action
+ if action then
+ action(fontdata)
+ end
+ end
+end
+
--
if fonts.hashes then