diff options
| -rw-r--r-- | luaotfload-auxiliary.lua | 52 |
1 files changed, 51 insertions, 1 deletions
diff --git a/luaotfload-auxiliary.lua b/luaotfload-auxiliary.lua index 1a48914..2bfcbf0 100644 --- a/luaotfload-auxiliary.lua +++ b/luaotfload-auxiliary.lua @@ -21,7 +21,8 @@ config.luaotfload = config.luaotfload or { } local aux = luaotfload.aux local log = luaotfload.log local warning = luaotfload.log -local identifiers = fonts.hashes.identifiers +local fonthashes = fonts.hashes +local identifiers = fonthashes.identifiers local fontid = font.id local texsprint = tex.sprint @@ -680,4 +681,53 @@ end aux.get_raw_fonts = get_raw_fonts +----------------------------------------------------------------------- +--- font parameters +----------------------------------------------------------------------- +--- analogy of font-hsh + +fonthashes.parameters = fonthashes.parameters or { } +fonthashes.quads = fonthashes.quads or { } + +local parameters = fonthashes.parameters or { } +local quads = fonthashes.quads or { } + +setmetatable(parameters, { __index = function (t, font_id) + local tfmdata = identifiers[font_id] + if not tfmdata then --- unsafe; avoid + tfmdata = font.fonts[font_id] + end + if tfmdata and type(tfmdata) == "table" then + local fontparameters = tfmdata.parameters + t[font_id] = fontparameters + return fontparameters + end + return nil +end}) + +--[[doc-- + + Note that the reason as to why we prefer functions over table indices + is that functions are much safer against unintended manipulation. + This justifies the overhead they cost. + +--doc]]-- + +--- int -> (number | false) +local get_quad = function (font_id) + local quad = quads[font_id] + if quad then + return quad + end + local fontparameters = parameters[font_id] + if fontparameters then + local quad = fontparameters.quad or 0 + quads[font_id] = quad + return quad + end + return false +end + +aux.get_quad = get_quad + -- vim:tw=71:sw=2:ts=2:expandtab |