diff options
Diffstat (limited to 'src/luaotfload-auxiliary.lua')
| -rw-r--r-- | src/luaotfload-auxiliary.lua | 26 |
1 files changed, 16 insertions, 10 deletions
diff --git a/src/luaotfload-auxiliary.lua b/src/luaotfload-auxiliary.lua index e544dd7..e482aba 100644 --- a/src/luaotfload-auxiliary.lua +++ b/src/luaotfload-auxiliary.lua @@ -100,17 +100,21 @@ luaotfload_callbacks [#luaotfload_callbacks + 1] = { "patch_font", set_sscale_dimens, "set_sscale_dimens", } +local default_units = 1000 + --- fontobj -> int local lookup_units = function (fontdata) - local metadata = fontdata.shared and fontdata.shared.rawdata.metadata - if metadata and metadata.units then - return metadata.units - elseif fontdata.parameters and fontdata.parameters.units then - return fontdata.parameters.units - elseif fontdata.units then --- v1.x - return fontdata.units + local units = fontdata.units + if units and units > 0 then return units end + local shared = fontdata.shared if not shared then return default_units end + local rawdata = shared.rawdata if not rawdata then return default_units end + local metadata = rawdata.metadata if not metadata then return default_units end + local capheight = metadata.capheight if not capheight then return default_units end + local units = metadata.units or fontdata.units + if not units or units == 0 then + return default_units end - return 1000 + return units end --[[doc-- @@ -213,8 +217,9 @@ local query_ascender = function (fontdata) local metadata = rawdata.metadata if not metadata then return false end local ascender = parameters.ascender or metadata.ascender if not ascender then return false end - local units = metadata.units if units == 0 then return false end local size = parameters.size if not size then return false end + local units = lookup_units (fontdata) + if not units or units == 0 then return false end return ascender * size / units end @@ -224,8 +229,9 @@ local query_capheight = function (fontdata) local rawdata = shared.rawdata if not rawdata then return false end local metadata = rawdata.metadata if not metadata then return false end local capheight = metadata.capheight if not capheight then return false end - local units = metadata.units if units == 0 then return false end local size = parameters.size if not size then return false end + local units = lookup_units (fontdata) + if not units or units == 0 then return false end return capheight * size / units end |