diff options
Diffstat (limited to 'luaotfload-database.lua')
| -rw-r--r-- | luaotfload-database.lua | 74 |
1 files changed, 55 insertions, 19 deletions
diff --git a/luaotfload-database.lua b/luaotfload-database.lua index 2dbc20c..9bf6823 100644 --- a/luaotfload-database.lua +++ b/luaotfload-database.lua @@ -736,7 +736,9 @@ local add_to_match = function (found, size, face) maxsize = optsize[2] minsize = optsize[3] - if dsnsize == size or (size > minsize and size <= maxsize) then + if size ~= nil + and (dsnsize == size or (size > minsize and size <= maxsize)) + then found[1] = face continue = false ---> break else @@ -777,6 +779,25 @@ the font database created by the luaotfload-tool script. --- · specification: string (== <lookup> ":" <name>) --- · sub: string --- +--- The “size” field deserves special attention: if its value is +--- negative, then it actually specifies a scalefactor of the +--- design size of the requested font. This happens e.g. if a font is +--- requested without an explicit “at size”. If the font is part of a +--- larger collection with different design sizes, this complicates +--- matters a bit: Normally, the resolver prefers fonts that have a +--- design size as close as possible to the requested size. If no +--- size specified, then the design size is implied. But which design +--- size should that be? Xetex appears to pick the “normal” (unmarked) +--- size: with Adobe fonts this would be the one that is neither +--- “caption” nor “subhead” nor “display” &c ... For fonts by Adobe this +--- seems to be the one that does not receive a “prefmodifiers” field. +--- (IOW Adobe uses the “prefmodifiers” field to encode the design size +--- in more or less human readable format.) However, this is not true +--- of LM and EB Garamond. As this matters only where there are +--- multiple design sizes to a given font/style combination, we put a +--- workaround in place that chooses that unmarked version. + +--- --- the first return value of “resolve” is the file name of the --- requested font (string) --- the second is of type bool or string and indicates the subfont of a @@ -784,10 +805,6 @@ the font database created by the luaotfload-tool script. --- --- 'a -> 'a -> table -> (string * string | bool * bool) --- ---- note by phg: I added a third return value that indicates a ---- successful lookup as this cannot be inferred from the other ---- values. ---- resolve = function (_, _, specification) -- the 1st two parameters are used by ConTeXt if not fonts_loaded then names.data = load_names() end @@ -797,10 +814,14 @@ resolve = function (_, _, specification) -- the 1st two parameters are used by C local style = sanitize_string(specification.style) or "regular" local askedsize + if specification.optsize then askedsize = tonumber(specification.optsize) - elseif specification.size then - askedsize = specification.size / 65536 + else + local specsize = specification.size + if specsize and specsize >= 0 then + askedsize = specsize / 65536 + end end if type(data) ~= "table" then @@ -918,25 +939,40 @@ resolve = function (_, _, specification) -- the 1st two parameters are used by C ) return filename, subfont, true end + elseif #found > 1 then -- we found matching font(s) but not in the requested optical -- sizes, so we loop through the matches to find the one with -- least difference from the requested size. - local closest - local least = math.huge -- initial value is infinity - - for i,face in next, found do + local match + + if askedsize then --- choose by design size + local closest + local least = math.huge -- initial value is infinity + + for i, face in next, found do + local dsnsize = face.size and face.size [1] or 0 + local difference = mathabs (dsnsize - askedsize) + if difference < least then + closest = face + least = difference + end + end - local dsnsize = face.size and face.size[1] or 0 - local difference = mathabs(dsnsize - askedsize) - if difference < least then - closest = face - least = difference + match = closest + else --- choose “unmarked” match, for Adobe fonts this + --- is the one without a “prefmodifiers” field. + match = found [1] --- fallback + for i, face in next, found do + if not face.sanitized.prefmodifiers then + match = face + break + end end end local success, filename, subfont - = get_font_file(data.filenames.full, closest) + = get_font_file(data.filenames.full, match) if success == true then report("log", 0, "resolve", "Font family='%s', subfamily='%s' found: %s", @@ -944,6 +980,7 @@ resolve = function (_, _, specification) -- the 1st two parameters are used by C ) return filename, subfont, true end + elseif fallback then local success, filename, subfont = get_font_file(data.filenames.full, fallback) @@ -1198,8 +1235,7 @@ ot_fullinfo = function (filename, subfont, texmf, basename) end end - namedata.sanitized = sanitize_names (fontnames) - + namedata.sanitized = sanitize_names (fontnames) namedata.fontname = metadata.fontname namedata.fullname = metadata.fullname namedata.familyname = metadata.familyname |