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-rw-r--r--luaotfload-database.lua26
1 files changed, 4 insertions, 22 deletions
diff --git a/luaotfload-database.lua b/luaotfload-database.lua
index 8faeba2..beef5b1 100644
--- a/luaotfload-database.lua
+++ b/luaotfload-database.lua
@@ -383,25 +383,20 @@ Even if we find a matching font eventually, the next time the
user compiles Eir document E will have to stand through the delay
again.
Thus, some caching of results -- even between runs -- is in order.
-We’ll just store successful lookups in the database in a record of
-the respective lookup type.
+We’ll just store successful name: lookups in a separate cache file.
type lookup_cache = (string, (string * num)) dict
-TODO:
+Complete, needs testing:
× 1) add cache to dbobj
× 2) wrap lookups in cached versions
× 3) make caching optional (via the config table) for debugging
× 4) make names_update() cache aware (nil if “force”)
× 5) add logging
× 6) add cache control to luaotfload-tool
- × 7) incr db version
- 8) wishlist: save cache only at the end of a run
- 9) ???
- n) PROFIT!!!
+ × 7) incr db version (now 2.203)
+ × 8) save cache only at the end of a run
-The name lookup requires both the “name” and some other
-keys, so we’ll concatenate them.
The spec is modified in place (ugh), so we’ll have to catalogue what
fields actually influence its behavior.
@@ -416,20 +411,11 @@ Idk what the “spec” resolver is for.
* name: contains both the name resolver from luatex-fonts and resolve()
below
-The following fields of a resolved spec need to be cached:
---doc]]--
-local cache_fields = {
- "forced", "hash", "lookup", "name", "resolved", "sub",
-}
-
---[[doc--
From my reading of font-def.lua, what a resolver does is
basically rewrite the “name” field of the specification record
with the resolution.
Also, the fields “resolved”, “sub”, “force” etc. influence the outcome.
-We’ll just cache a deep copy of the entire spec as it leaves the
-resolver, lest we want to worry if we caught all the details.
--doc]]--
--- 'a -> 'a -> table -> (string * int|boolean * boolean)
@@ -459,12 +445,8 @@ resolve_cached = function (_, _, specification)
names.lookups[request] = entry
--- obviously, the updated cache needs to be stored.
- --- for the moment, we write the entire db to disk
- --- whenever the cache is updated.
--- TODO this should trigger a save only once the
--- document is compiled (finish_pdffile callback?)
- --- TODO we should speed up writing by separating
- --- the cache from the db
report("both", 5, "cache", "saving updated cache")
save_lookups()
return filename, subfont, true