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Diffstat (limited to 'tex/context/base/font-afm.lua')
| -rw-r--r-- | tex/context/base/font-afm.lua | 855 |
1 files changed, 855 insertions, 0 deletions
diff --git a/tex/context/base/font-afm.lua b/tex/context/base/font-afm.lua new file mode 100644 index 000000000..87dec59c6 --- /dev/null +++ b/tex/context/base/font-afm.lua @@ -0,0 +1,855 @@ +if not modules then modules = { } end modules ['font-afm'] = { + version = 1.001, + comment = "companion to font-ini.mkiv", + author = "Hans Hagen, PRAGMA-ADE, Hasselt NL", + copyright = "PRAGMA ADE / ConTeXt Development Team", + license = "see context related readme files" +} + +--[[ldx-- +<p>Some code may look a bit obscure but this has to do with the +fact that we also use this code for testing and much code evolved +in the transition from <l n='tfm'/> to <l n='afm'/> to <l +n='otf'/>.</p> + +<p>The following code still has traces of intermediate font support +where we handles font encodings. Eventually font encoding goes +away.</p> +--ldx]]-- + +local trace_features = false trackers.register("afm.features", function(v) trace_features = v end) +local trace_indexing = false trackers.register("afm.indexing", function(v) trace_indexing = v end) +local trace_loading = false trackers.register("afm.loading", function(v) trace_loading = v end) + +local format, match, gmatch, lower, gsub = string.format, string.match, string.gmatch, string.lower, string.gsub +local lpegmatch = lpeg.match +local abs = math.abs + +fonts = fonts or { } +fonts.afm = fonts.afm or { } + +local afm = fonts.afm +local tfm = fonts.tfm + +afm.version = 1.402 -- incrementing this number one up will force a re-cache +afm.syncspace = true -- when true, nicer stretch values +afm.enhance_data = true -- best leave this set to true +afm.features = { } +afm.features.aux = { } +afm.features.data = { } +afm.features.list = { } +afm.features.default = { } +afm.cache = containers.define("fonts", "afm", afm.version, true) + +--[[ldx-- +<p>We start with the basic reader which we give a name similar to the +built in <l n='tfm'/> and <l n='otf'/> reader.</p> +--ldx]]-- + +--~ Comment FONTIDENTIFIER LMMATHSYMBOLS10 +--~ Comment CODINGSCHEME TEX MATH SYMBOLS +--~ Comment DESIGNSIZE 10.0 pt +--~ Comment CHECKSUM O 4261307036 +--~ Comment SPACE 0 plus 0 minus 0 +--~ Comment QUAD 1000 +--~ Comment EXTRASPACE 0 +--~ Comment NUM 676.508 393.732 443.731 +--~ Comment DENOM 685.951 344.841 +--~ Comment SUP 412.892 362.892 288.889 +--~ Comment SUB 150 247.217 +--~ Comment SUPDROP 386.108 +--~ Comment SUBDROP 50 +--~ Comment DELIM 2390 1010 +--~ Comment AXISHEIGHT 250 + +local c = lpeg.P("Comment") +local s = lpeg.S(" \t") +local l = lpeg.S("\n\r") +local w = lpeg.C((1 - l)^1) +local n = lpeg.C((lpeg.R("09") + lpeg.S("."))^1) / tonumber * s^0 + +local fd = { } + +local pattern = ( c * s^1 * ( + ("CODINGSCHEME" * s^1 * w ) / function(a) end + + ("DESIGNSIZE" * s^1 * n * w ) / function(a) fd[ 1] = a end + + ("CHECKSUM" * s^1 * n * w ) / function(a) fd[ 2] = a end + + ("SPACE" * s^1 * n * "plus" * n * "minus" * n) / function(a,b,c) fd[ 3], fd[ 4], fd[ 5] = a, b, c end + + ("QUAD" * s^1 * n ) / function(a) fd[ 6] = a end + + ("EXTRASPACE" * s^1 * n ) / function(a) fd[ 7] = a end + + ("NUM" * s^1 * n * n * n ) / function(a,b,c) fd[ 8], fd[ 9], fd[10] = a, b, c end + + ("DENOM" * s^1 * n * n ) / function(a,b ) fd[11], fd[12] = a, b end + + ("SUP" * s^1 * n * n * n ) / function(a,b,c) fd[13], fd[14], fd[15] = a, b, c end + + ("SUB" * s^1 * n * n ) / function(a,b) fd[16], fd[17] = a, b end + + ("SUPDROP" * s^1 * n ) / function(a) fd[18] = a end + + ("SUBDROP" * s^1 * n ) / function(a) fd[19] = a end + + ("DELIM" * s^1 * n * n ) / function(a,b) fd[20], fd[21] = a, b end + + ("AXISHEIGHT" * s^1 * n ) / function(a) fd[22] = a end + + (1-l)^0 +) + (1-c)^1)^0 + +local function scan_comment(str) + fd = { } + lpegmatch(pattern,str) + return fd +end + +-- On a rainy day I will rewrite this in lpeg ... + +local keys = { } + +function keys.FontName (data,line) data.metadata.fullname = line:strip() end +function keys.ItalicAngle (data,line) data.metadata.italicangle = tonumber (line) end +function keys.IsFixedPitch(data,line) data.metadata.isfixedpitch = toboolean(line,true) end +function keys.CharWidth (data,line) data.metadata.charwidth = tonumber (line) end +function keys.XHeight (data,line) data.metadata.xheight = tonumber (line) end +function keys.Descender (data,line) data.metadata.descender = tonumber (line) end +function keys.Ascender (data,line) data.metadata.ascender = tonumber (line) end +function keys.Comment (data,line) + -- Comment DesignSize 12 (pts) + -- Comment TFM designsize: 12 (in points) + line = lower(line) + local designsize = match(line,"designsize[^%d]*(%d+)") + if designsize then data.metadata.designsize = tonumber(designsize) end +end + +local function get_charmetrics(data,charmetrics,vector) + local characters = data.characters + local chr, str, ind = { }, "", 0 + for k,v in gmatch(charmetrics,"([%a]+) +(.-) *;") do + if k == 'C' then + if str ~= "" then characters[str] = chr end + chr = { } + str = "" + v = tonumber(v) + if v < 0 then + ind = ind + 1 + else + ind = v + end + chr.index = ind + elseif k == 'WX' then + chr.width = v + elseif k == 'N' then + str = v + elseif k == 'B' then + local llx, lly, urx, ury = match(v,"^ *(.-) +(.-) +(.-) +(.-)$") + chr.boundingbox = { tonumber(llx), tonumber(lly), tonumber(urx), tonumber(ury) } + elseif k == 'L' then + local plus, becomes = match(v,"^(.-) +(.-)$") + if not chr.ligatures then chr.ligatures = { } end + chr.ligatures[plus] = becomes + end + end + if str ~= "" then + characters[str] = chr + end +end + +local function get_kernpairs(data,kernpairs) + local characters = data.characters + for one, two, value in gmatch(kernpairs,"KPX +(.-) +(.-) +(.-)\n") do + local chr = characters[one] + if chr then + if not chr.kerns then chr.kerns = { } end + chr.kerns[two] = tonumber(value) + end + end +end + +local function get_variables(data,fontmetrics) + for key, rest in gmatch(fontmetrics,"(%a+) *(.-)[\n\r]") do + if keys[key] then keys[key](data,rest) end + end +end + +local function get_indexes(data,filename) + local pfbfile = file.replacesuffix(filename,"pfb") + local pfbname = resolvers.find_file(pfbfile,"pfb") or "" + if pfbname == "" then + pfbname = resolvers.find_file(file.basename(pfbfile),"pfb") or "" + end + if pfbname ~= "" then + data.luatex.filename = pfbname + local pfbblob = fontloader.open(pfbname) + if pfbblob then + local characters = data.characters + local pfbdata = fontloader.to_table(pfbblob) + --~ print(table.serialize(pfbdata)) + if pfbdata then + local glyphs = pfbdata.glyphs + if glyphs then + if trace_loading then + logs.report("load afm","getting index data from %s",pfbname) + end + -- local offset = (glyphs[0] and glyphs[0] != .notdef) or 0 + for index, glyph in next, glyphs do + local name = glyph.name + if name then + local char = characters[name] + if char then + if trace_indexing then + logs.report("load afm","glyph %s has index %s",name,index) + end + char.index = index + end + end + end + elseif trace_loading then + logs.report("load afm","no glyph data in pfb file %s",pfbname) + end + elseif trace_loading then + logs.report("load afm","no data in pfb file %s",pfbname) + end + fontloader.close(pfbblob) + elseif trace_loading then + logs.report("load afm","invalid pfb file %s",pfbname) + end + elseif trace_loading then + logs.report("load afm","no pfb file for %s",filename) + end +end + +function afm.read_afm(filename) + local ok, afmblob, size = resolvers.loadbinfile(filename) -- has logging +-- local ok, afmblob = true, file.readdata(filename) + if ok and afmblob then + local data = { + characters = { }, + metadata = { + version = version or '0', -- hm + filename = file.removesuffix(file.basename(filename)) + } + } + afmblob = gsub(afmblob,"StartCharMetrics(.-)EndCharMetrics", function(charmetrics) + if trace_loading then + logs.report("load afm","loading char metrics") + end + get_charmetrics(data,charmetrics,vector) + return "" + end) + afmblob = gsub(afmblob,"StartKernPairs(.-)EndKernPairs", function(kernpairs) + if trace_loading then + logs.report("load afm","loading kern pairs") + end + get_kernpairs(data,kernpairs) + return "" + end) + afmblob = gsub(afmblob,"StartFontMetrics%s+([%d%.]+)(.-)EndFontMetrics", function(version,fontmetrics) + if trace_loading then + logs.report("load afm","loading variables") + end + data.afmversion = version + get_variables(data,fontmetrics) + data.fontdimens = scan_comment(fontmetrics) -- todo: all lpeg, no time now + return "" + end) + data.luatex = { } + get_indexes(data,filename) + return data + else + if trace_loading then + logs.report("load afm","no valid afm file %s",filename) + end + return nil + end +end + +--[[ldx-- +<p>We cache files. Caching is taken care of in the loader. We cheat a bit +by adding ligatures and kern information to the afm derived data. That +way we can set them faster when defining a font.</p> +--ldx]]-- + +function afm.load(filename) + -- hm, for some reasons not resolved yet + filename = resolvers.find_file(filename,'afm') or "" + if filename ~= "" then + local name = file.removesuffix(file.basename(filename)) + local data = containers.read(afm.cache(),name) + local size = lfs.attributes(filename,"size") or 0 + if not data or data.verbose ~= fonts.verbose or data.size ~= size then + logs.report("load afm", "reading %s",filename) + data = afm.read_afm(filename) + if data then + -- data.luatex = data.luatex or { } + logs.report("load afm", "unifying %s",filename) + afm.unify(data,filename) + if afm.enhance_data then + logs.report("load afm", "add ligatures") + afm.add_ligatures(data,'ligatures') -- easier this way + logs.report("load afm", "add tex-ligatures") + afm.add_ligatures(data,'texligatures') -- easier this way + logs.report("load afm", "add extra kerns") + afm.add_kerns(data) -- faster this way + end + logs.report("load afm", "add tounicode data") + fonts.map.add_to_unicode(data,filename) + data.size = size + data.verbose = fonts.verbose + logs.report("load afm","saving: %s in cache",name) + data = containers.write(afm.cache(), name, data) + data = containers.read(afm.cache(),name) + end + end + return data + else + return nil + end +end + +function afm.unify(data, filename) + local unicodevector = fonts.enc.load('unicode').hash + local glyphs, indices, unicodes, names = { }, { }, { }, { } + local verbose, private = fonts.verbose, fonts.private + for name, blob in next, data.characters do + local code = unicodevector[name] -- or characters.name_to_unicode[name] + if not code then + local u = match(name,"^uni(%x+)$") + code = u and tonumber(u,16) + if not code then + code = private + private = private + 1 + logs.report("afm glyph", "assigning private slot U+%04X for unknown glyph name %s", code, name) + end + end + local index = blob.index + unicodes[name] = code + indices[code] = index + glyphs[index] = blob + names[name] = index + blob.name = name + if verbose then + local bu = blob.unicode + if not bu then + blob.unicode = code + elseif type(bu) == "table" then + bu[#bu+1] = code + else + blob.unicode = { bu, code } + end + else + blob.index = nil + end + end + data.glyphs = glyphs + data.characters = nil + local luatex = data.luatex + luatex.filename = luatex.filename or file.removesuffix(file.basename(filename)) + luatex.unicodes = unicodes -- name to unicode + luatex.indices = indices -- unicode to index + luatex.marks = { } -- todo + luatex.names = names -- name to index + luatex.private = private +end + +--[[ldx-- +<p>These helpers extend the basic table with extra ligatures, texligatures +and extra kerns. This saves quite some lookups later.</p> +--ldx]]-- + +function afm.add_ligatures(afmdata,ligatures) + local glyphs, luatex = afmdata.glyphs, afmdata.luatex + local indices, unicodes, names = luatex.indices, luatex.unicodes, luatex.names + for k,v in next, characters[ligatures] do -- main characters table + local one = glyphs[names[k]] + if one then + for _, b in next, v do + two, three = b[1], b[2] + if two and three and names[two] and names[three] then + local ol = one[ligatures] + if ol then + if not ol[two] then -- was one.ligatures ... bug + ol[two] = three + end + else + one[ligatures] = { [two] = three } + end + end + end + end + end +end + +--[[ldx-- +<p>We keep the extra kerns in separate kerning tables so that we can use +them selectively.</p> +--ldx]]-- + +function afm.add_kerns(afmdata) + local glyphs = afmdata.glyphs + local names = afmdata.luatex.names + local uncomposed = characters.uncomposed + local function do_it_left(what) + for index, glyph in next, glyphs do + local kerns = glyph.kerns + if kerns then + local extrakerns = glyph.extrakerns or { } + for complex, simple in next, uncomposed[what] do + if names[compex] then + local ks = kerns[simple] + if ks and not kerns[complex] then + extrakerns[complex] = ks + end + end + end + if next(extrakerns) then + glyph.extrakerns = extrakerns + end + end + end + end + local function do_it_copy(what) + for complex, simple in next, uncomposed[what] do + local c = glyphs[names[complex]] + if c then -- optional + local s = glyphs[names[simple]] + if s then + if not c.kerns then + c.extrakerns = s.kerns or { } + end + if s.extrakerns then + local extrakerns = c.extrakerns or { } + for k, v in next, s.extrakerns do + extrakerns[k] = v + end + if next(extrakerns) then + s.extrakerns = extrakerns + end + end + end + end + end + end + -- add complex with values of simplified when present + do_it_left("left") + do_it_left("both") + -- copy kerns from simple char to complex char unless set + do_it_copy("both") + do_it_copy("right") +end + +--[[ldx-- +<p>The copying routine looks messy (and is indeed a bit messy).</p> +--ldx]]-- + +-- once we have otf sorted out (new format) we can try to make the afm +-- cache similar to it (similar tables) + +function afm.add_dimensions(data) -- we need to normalize afm to otf i.e. indexed table instead of name + if data then + for index, glyph in next, data.glyphs do + local bb = glyph.boundingbox + if bb then + local ht, dp = bb[4], -bb[2] + if ht == 0 or ht < 0 then + -- no need to set it and no negative heights, nil == 0 + else + glyph.height = ht + end + if dp == 0 or dp < 0 then + -- no negative depths and no negative depths, nil == 0 + else + glyph.depth = dp + end + end + end + end +end + +fonts.formats.afm = "type1" +fonts.formats.pfb = "type1" + +function afm.copy_to_tfm(data) + if data then + local glyphs = data.glyphs + if glyphs then + local metadata, luatex = data.metadata, data.luatex + local unicodes, indices = luatex.unicodes, luatex.indices + local characters, parameters, descriptions = { }, { }, { } + -- todo : merge into tfm + for u, i in next, indices do + local d = glyphs[i] + characters[u] = { } + descriptions[u] = d + end + local filename = fonts.tfm.checked_filename(luatex) -- was metadata.filename + local fontname = metadata.fontname or metadata.fullname + local fullname = metadata.fullname or metadata.fontname + local endash, emdash, space, spaceunits = unicodes['space'], unicodes['emdash'], "space", 500 + -- same as otf + if metadata.isfixedpitch then + if descriptions[endash] then + spaceunits, spacer = descriptions[endash].width, "space" + end + if not spaceunits and descriptions[emdash] then + spaceunits, spacer = descriptions[emdash].width, "emdash" + end + if not spaceunits and metadata.charwidth then + spaceunits, spacer = metadata.charwidth, "charwidth" + end + else + if descriptions[endash] then + spaceunits, spacer = descriptions[endash].width, "space" + end + if not spaceunits and metadata.charwidth then + spaceunits, spacer = metadata.charwidth, "charwidth" + end + end + spaceunits = tonumber(spaceunits) + if spaceunits < 200 then + -- todo: warning + end + -- + parameters.slant = 0 + parameters.space = spaceunits + parameters.space_stretch = 500 + parameters.space_shrink = 333 + parameters.x_height = 400 + parameters.quad = 1000 + local italicangle = data.metadata.italicangle + if italicangle then + parameters.slant = parameters.slant - math.round(math.tan(italicangle*math.pi/180)) + end + if metadata.isfixedpitch then + parameters.space_stretch = 0 + parameters.space_shrink = 0 + elseif afm.syncspace then + parameters.space_stretch = spaceunits/2 + parameters.space_shrink = spaceunits/3 + end + parameters.extra_space = parameters.space_shrink + if metadata.xheight and metadata.xheight > 0 then + parameters.x_height = metadata.xheight + else + -- same as otf + local x = unicodes['x'] + if x then + local x = descriptions[x] + if x then + parameters.x_height = x.height + end + end + -- + end + local fd = data.fontdimens + if fd and fd[8] and fd[9] and fd[10] then -- math + for k,v in next, fd do + parameters[k] = v + end + end + -- + if next(characters) then + return { + characters = characters, + parameters = parameters, + descriptions = descriptions, + indices = indices, + unicodes = unicodes, + luatex = luatex, + encodingbytes = 2, + filename = filename, + fontname = fontname, + fullname = fullname, + psname = fullname, -- in otf: tfm.fontname or tfm.fullname + name = filename or fullname or fontname, + format = fonts.fontformat(filename,"type1"), + type = 'real', + units = 1000, + direction = 0, + boundarychar_label = 0, + boundarychar = 65536, + --~ false_boundarychar = 65536, -- produces invalid tfm in luatex + designsize = (metadata.designsize or 10)*65536, + spacer = spacer, + ascender = abs(metadata.ascender or 0), + descender = abs(metadata.descender or 0), + italicangle = italicangle, + } + end + end + end + return nil +end + +--[[ldx-- +<p>Originally we had features kind of hard coded for <l n='afm'/> +files but since I expect to support more font formats, I decided +to treat this fontformat like any other and handle features in a +more configurable way.</p> +--ldx]]-- + +function afm.features.register(name,default) + afm.features.list[#afm.features.list+1] = name + afm.features.default[name] = default +end + +function afm.set_features(tfmdata) + local shared = tfmdata.shared + local afmdata = shared.afmdata + local features = shared.features + if features and next(features) then + local mode = tfmdata.mode or fonts.mode + local initializers = fonts.initializers + local fi = initializers[mode] + local fiafm = fi and fi.afm + if fiafm then + local lists = { + fonts.triggers, + afm.features.list, + fonts.manipulators, + } + for l=1,3 do + local list = lists[l] + if list then + for i=1,#list do + local f = list[i] + local value = features[f] + if value and fiafm[f] then -- brr + if trace_features then + logs.report("define afm","initializing feature %s to %s for mode %s for font %s",f,tostring(value),mode or 'unknown',tfmdata.name or 'unknown') + end + fiafm[f](tfmdata,value) + mode = tfmdata.mode or fonts.mode + fiafm = initializers[mode].afm + end + end + end + end + end + local fm = fonts.methods[mode] + local fmafm = fm and fm.afm + if fmfm then + local lists = { + afm.features.list, + } + local sp = shared.processors + for l=1,1 do + local list = lists[l] + if list then + for i=1,#list do + local f = list[i] + if features[f] and fmafm[f] then -- brr + if not sp then + sp = { fmafm[f] } + shared.processors = sp + else + sp[#sp+1] = fmafm[f] + end + end + end + end + end + end + end +end + +function afm.check_features(specification) + local features, done = fonts.define.check(specification.features.normal,afm.features.default) + if done then + specification.features.normal = features + tfm.hash_instance(specification,true) + end +end + +function afm.afm_to_tfm(specification) + local afmname = specification.filename or specification.name + if specification.forced == "afm" or specification.format == "afm" then -- move this one up + if trace_loading then + logs.report("load afm","forcing afm format for %s",afmname) + end + else + local tfmname = resolvers.findbinfile(afmname,"ofm") or "" + if tfmname ~= "" then + if trace_loading then + logs.report("load afm","fallback from afm to tfm for %s",afmname) + end + afmname = "" + end + end + if afmname == "" then + return nil + else + afm.check_features(specification) + specification = fonts.define.resolve(specification) -- new, was forgotten + local features = specification.features.normal + local cache_id = specification.hash + local tfmdata = containers.read(tfm.cache(), cache_id) -- cache with features applied + if not tfmdata then + local afmdata = afm.load(afmname) + if afmdata and next(afmdata) then + afm.add_dimensions(afmdata) + tfmdata = afm.copy_to_tfm(afmdata) + if tfmdata and next(tfmdata) then + tfmdata.shared = tfmdata.shared or { } + tfmdata.unique = tfmdata.unique or { } + tfmdata.shared.afmdata = afmdata + tfmdata.shared.features = features + afm.set_features(tfmdata) + end + elseif trace_loading then + logs.report("load afm","no (valid) afm file found with name %s",afmname) + end + tfmdata = containers.write(tfm.cache(),cache_id,tfmdata) + end + return tfmdata + end +end + +--[[ldx-- +<p>As soon as we could intercept the <l n='tfm'/> reader, I implemented an +<l n='afm'/> reader. Since traditional <l n='pdftex'/> could use <l n='opentype'/> +fonts with <l n='afm'/> companions, the following method also could handle +those cases, but now that we can handle <l n='opentype'/> directly we no longer +need this features.</p> +--ldx]]-- + +tfm.default_encoding = 'unicode' + +function tfm.set_normal_feature(specification,name,value) + if specification and name then + specification.features = specification.features or { } + specification.features.normal = specification.features.normal or { } + specification.features.normal[name] = value + end +end + +function tfm.read_from_afm(specification) + local tfmtable = afm.afm_to_tfm(specification) + if tfmtable then + tfmtable.name = specification.name + tfmtable = tfm.scale(tfmtable, specification.size, specification.relativeid) + local afmdata = tfmtable.shared.afmdata +--~ local filename = afmdata and afmdata.luatex and afmdata.luatex.filename +--~ if filename then +--~ tfmtable.encodingbytes = 2 +--~ tfmtable.filename = resolvers.findbinfile(filename,"") or filename +--~ tfmtable.fontname = afmdata.metadata.fontname or afmdata.metadata.fullname +--~ tfmtable.fullname = afmdata.metadata.fullname or afmdata.metadata.fontname +--~ tfmtable.format = 'type1' +--~ tfmtable.name = afmdata.luatex.filename or tfmtable.fullname +--~ end + if fonts.dontembed[filename] then + tfmtable.file = nil -- or filename ? + end + fonts.logger.save(tfmtable,'afm',specification) + end + return tfmtable +end + +--[[ldx-- +<p>Here comes the implementation of a few features. We only implement +those that make sense for this format.</p> +--ldx]]-- + +function afm.features.prepare_ligatures(tfmdata,ligatures,value) + if value then + local afmdata = tfmdata.shared.afmdata + local luatex = afmdata.luatex + local unicodes = luatex.unicodes + local descriptions = tfmdata.descriptions + for u, chr in next, tfmdata.characters do + local d = descriptions[u] + local l = d[ligatures] + if l then + local ligatures = chr.ligatures + if not ligatures then + ligatures = { } + chr.ligatures = ligatures + end + for k, v in next, l do + local uk, uv = unicodes[k], unicodes[v] + if uk and uv then + ligatures[uk] = { + char = uv, + type = 0 + } + end + end + end + end + end +end + +function afm.features.prepare_kerns(tfmdata,kerns,value) + if value then + local afmdata = tfmdata.shared.afmdata + local luatex = afmdata.luatex + local unicodes = luatex.unicodes + local descriptions = tfmdata.descriptions + for u, chr in next, tfmdata.characters do + local d = descriptions[u] + local newkerns = d[kerns] + if newkerns then + local kerns = chr.kerns + if not kerns then + kerns = { } + chr.kerns = kerns + end + for k,v in next, newkerns do + local uk = unicodes[k] + if uk then + kerns[uk] = v + end + end + end + end + end +end + +-- hm, register? + +function fonts.initializers.base.afm.ligatures (tfmdata,value) afm.features.prepare_ligatures(tfmdata,'ligatures', value) end +function fonts.initializers.base.afm.texligatures(tfmdata,value) afm.features.prepare_ligatures(tfmdata,'texligatures',value) end +function fonts.initializers.base.afm.kerns (tfmdata,value) afm.features.prepare_kerns (tfmdata,'kerns', value) end +function fonts.initializers.base.afm.extrakerns (tfmdata,value) afm.features.prepare_kerns (tfmdata,'extrakerns', value) end + +afm.features.register('liga',true) +afm.features.register('kerns',true) +afm.features.register('extrakerns') -- needed? + +fonts.initializers.node.afm.ligatures = fonts.initializers.base.afm.ligatures +fonts.initializers.node.afm.texligatures = fonts.initializers.base.afm.texligatures +fonts.initializers.node.afm.kerns = fonts.initializers.base.afm.kerns +fonts.initializers.node.afm.extrakerns = fonts.initializers.base.afm.extrakerns + +fonts.initializers.base.afm.liga = fonts.initializers.base.afm.ligatures +fonts.initializers.node.afm.liga = fonts.initializers.base.afm.ligatures +fonts.initializers.base.afm.tlig = fonts.initializers.base.afm.texligatures +fonts.initializers.node.afm.tlig = fonts.initializers.base.afm.texligatures + +fonts.initializers.base.afm.trep = tfm.replacements +fonts.initializers.node.afm.trep = tfm.replacements + +afm.features.register('tlig',true) -- todo: also proper features for afm +afm.features.register('trep',true) -- todo: also proper features for afm + +-- tfm features + +fonts.initializers.base.afm.equaldigits = fonts.initializers.common.equaldigits +fonts.initializers.node.afm.equaldigits = fonts.initializers.common.equaldigits +fonts.initializers.base.afm.lineheight = fonts.initializers.common.lineheight +fonts.initializers.node.afm.lineheight = fonts.initializers.common.lineheight + +-- vf features + +fonts.initializers.base.afm.compose = fonts.initializers.common.compose +fonts.initializers.node.afm.compose = fonts.initializers.common.compose + +-- afm specific, encodings ...kind of obsolete + +afm.features.register('encoding') + +fonts.initializers.base.afm.encoding = fonts.initializers.common.encoding +fonts.initializers.node.afm.encoding = fonts.initializers.common.encoding + +-- todo: oldstyle smallcaps as features for afm files (use with care) + +fonts.initializers.base.afm.onum = fonts.initializers.common.oldstyle +fonts.initializers.base.afm.smcp = fonts.initializers.common.smallcaps +fonts.initializers.base.afm.fkcp = fonts.initializers.common.fakecaps + +afm.features.register('onum',false) +afm.features.register('smcp',false) +afm.features.register('fkcp',false) + |