diff options
Diffstat (limited to 'tex/context/base/font-ext.lua')
-rw-r--r-- | tex/context/base/font-ext.lua | 1892 |
1 files changed, 946 insertions, 946 deletions
diff --git a/tex/context/base/font-ext.lua b/tex/context/base/font-ext.lua index 89d5927d4..d2bc21837 100644 --- a/tex/context/base/font-ext.lua +++ b/tex/context/base/font-ext.lua @@ -1,946 +1,946 @@ -if not modules then modules = { } end modules ['font-ext'] = { - version = 1.001, - comment = "companion to font-ini.mkiv and hand-ini.mkiv", - author = "Hans Hagen, PRAGMA-ADE, Hasselt NL", - copyright = "PRAGMA ADE / ConTeXt Development Team", - license = "see context related readme files" -} - -local next, type, byte = next, type, string.byte -local gmatch, concat, format = string.gmatch, table.concat, string.format -local utfchar = utf.char - -local commands, context = commands, context -local fonts, utilities = fonts, utilities - -local trace_protrusion = false trackers.register("fonts.protrusion", function(v) trace_protrusion = v end) -local trace_expansion = false trackers.register("fonts.expansion", function(v) trace_expansion = v end) - -local report_expansions = logs.reporter("fonts","expansions") -local report_protrusions = logs.reporter("fonts","protrusions") - --- todo: byte(..) => 0xHHHH - ---[[ldx-- -<p>When we implement functions that deal with features, most of them -will depend of the font format. Here we define the few that are kind -of neutral.</p> ---ldx]]-- - -local handlers = fonts.handlers -local hashes = fonts.hashes -local otf = handlers.otf - -local registerotffeature = handlers.otf.features.register -local registerafmfeature = handlers.afm.features.register - -local fontdata = hashes.identifiers - -local allocate = utilities.storage.allocate -local settings_to_array = utilities.parsers.settings_to_array -local getparameters = utilities.parsers.getparameters - -local setmetatableindex = table.setmetatableindex - --- -- -- -- -- -- --- shared --- -- -- -- -- -- - -local function get_class_and_vector(tfmdata,value,where) -- "expansions" - local g_where = tfmdata.goodies and tfmdata.goodies[where] - local f_where = fonts[where] - local g_classes = g_where and g_where.classes - local f_classes = f_where and f_where.classes - local class = (g_classes and g_classes[value]) or (f_classes and f_classes[value]) - if class then - local class_vector = class.vector - local g_vectors = g_where and g_where.vectors - local f_vectors = f_where and f_where.vectors - local vector = (g_vectors and g_vectors[class_vector]) or (f_vectors and f_vectors[class_vector]) - return class, vector - end -end - --- -- -- -- -- -- --- expansion (hz) --- -- -- -- -- -- - -local expansions = fonts.expansions or allocate() - -fonts.expansions = expansions - -local classes = expansions.classes or allocate() -local vectors = expansions.vectors or allocate() - -expansions.classes = classes -expansions.vectors = vectors - --- beware, pdftex itself uses percentages * 10 - -classes.preset = { stretch = 2, shrink = 2, step = .5, factor = 1 } - -function commands.setupfontexpansion(class,settings) - getparameters(classes,class,'preset',settings) -end - -classes['quality'] = { - stretch = 2, shrink = 2, step = .5, vector = 'default', factor = 1 -} - -vectors['default'] = { - [byte('A')] = 0.5, [byte('B')] = 0.7, [byte('C')] = 0.7, [byte('D')] = 0.5, [byte('E')] = 0.7, - [byte('F')] = 0.7, [byte('G')] = 0.5, [byte('H')] = 0.7, [byte('K')] = 0.7, [byte('M')] = 0.7, - [byte('N')] = 0.7, [byte('O')] = 0.5, [byte('P')] = 0.7, [byte('Q')] = 0.5, [byte('R')] = 0.7, - [byte('S')] = 0.7, [byte('U')] = 0.7, [byte('W')] = 0.7, [byte('Z')] = 0.7, - [byte('a')] = 0.7, [byte('b')] = 0.7, [byte('c')] = 0.7, [byte('d')] = 0.7, [byte('e')] = 0.7, - [byte('g')] = 0.7, [byte('h')] = 0.7, [byte('k')] = 0.7, [byte('m')] = 0.7, [byte('n')] = 0.7, - [byte('o')] = 0.7, [byte('p')] = 0.7, [byte('q')] = 0.7, [byte('s')] = 0.7, [byte('u')] = 0.7, - [byte('w')] = 0.7, [byte('z')] = 0.7, - [byte('2')] = 0.7, [byte('3')] = 0.7, [byte('6')] = 0.7, [byte('8')] = 0.7, [byte('9')] = 0.7, -} - -vectors['quality'] = vectors['default'] -- metatable ? - -local function initializeexpansion(tfmdata,value) - if value then - local class, vector = get_class_and_vector(tfmdata,value,"expansions") - if class then - if vector then - local stretch = class.stretch or 0 - local shrink = class.shrink or 0 - local step = class.step or 0 - local factor = class.factor or 1 - if trace_expansion then - report_expansions("setting class %a, vector %a, factor %a, stretch %a, shrink %a, step %a", - value,class.vector,factor,stretch,shrink,step) - end - tfmdata.parameters.expansion = { - stretch = 10 * stretch, - shrink = 10 * shrink, - step = 10 * step, - factor = factor, - auto = true, - } - local data = characters and characters.data - for i, chr in next, tfmdata.characters do - local v = vector[i] - if data and not v then -- we could move the data test outside (needed for plain) - local d = data[i] - if d then - local s = d.shcode - if not s then - -- sorry - elseif type(s) == "table" then - v = ((vector[s[1]] or 0) + (vector[s[#s]] or 0)) / 2 - else - v = vector[s] or 0 - end - end - end - if v and v ~= 0 then - chr.expansion_factor = v*factor - else -- can be option - chr.expansion_factor = factor - end - end - elseif trace_expansion then - report_expansions("unknown vector %a in class %a",class.vector,value) - end - elseif trace_expansion then - report_expansions("unknown class %a",value) - end - end -end - -registerotffeature { - name = "expansion", - description = "apply hz optimization", - initializers = { - base = initializeexpansion, - node = initializeexpansion, - } -} - -registerafmfeature { - name = "expansion", - description = "apply hz optimization", - initializers = { - base = initializeexpansion, - node = initializeexpansion, - } -} - -fonts.goodies.register("expansions", function(...) return fonts.goodies.report("expansions", trace_expansion, ...) end) - -local report_opbd = logs.reporter("fonts","otf opbd") - --- -- -- -- -- -- --- protrusion --- -- -- -- -- -- - -fonts.protrusions = allocate() -local protrusions = fonts.protrusions - -protrusions.classes = allocate() -protrusions.vectors = allocate() - -local classes = protrusions.classes -local vectors = protrusions.vectors - --- the values need to be revisioned - -classes.preset = { factor = 1, left = 1, right = 1 } - -function commands.setupfontprotrusion(class,settings) - getparameters(classes,class,'preset',settings) -end - -classes['pure'] = { - vector = 'pure', factor = 1 -} -classes['punctuation'] = { - vector = 'punctuation', factor = 1 -} -classes['alpha'] = { - vector = 'alpha', factor = 1 -} -classes['quality'] = { - vector = 'quality', factor = 1 -} - -vectors['pure'] = { - - [0x002C] = { 0, 1 }, -- comma - [0x002E] = { 0, 1 }, -- period - [0x003A] = { 0, 1 }, -- colon - [0x003B] = { 0, 1 }, -- semicolon - [0x002D] = { 0, 1 }, -- hyphen - [0x00AD] = { 0, 1 }, -- also hyphen - [0x2013] = { 0, 0.50 }, -- endash - [0x2014] = { 0, 0.33 }, -- emdash - [0x3001] = { 0, 1 }, -- ideographic comma 、 - [0x3002] = { 0, 1 }, -- ideographic full stop 。 - [0x060C] = { 0, 1 }, -- arabic comma ، - [0x061B] = { 0, 1 }, -- arabic semicolon ؛ - [0x06D4] = { 0, 1 }, -- arabic full stop ۔ - -} - -vectors['punctuation'] = { - - [0x003F] = { 0, 0.20 }, -- ? - [0x00BF] = { 0, 0.20 }, -- ¿ - [0x0021] = { 0, 0.20 }, -- ! - [0x00A1] = { 0, 0.20 }, -- ¡ - [0x0028] = { 0.05, 0 }, -- ( - [0x0029] = { 0, 0.05 }, -- ) - [0x005B] = { 0.05, 0 }, -- [ - [0x005D] = { 0, 0.05 }, -- ] - [0x002C] = { 0, 0.70 }, -- comma - [0x002E] = { 0, 0.70 }, -- period - [0x003A] = { 0, 0.50 }, -- colon - [0x003B] = { 0, 0.50 }, -- semicolon - [0x002D] = { 0, 0.70 }, -- hyphen - [0x00AD] = { 0, 0.70 }, -- also hyphen - [0x2013] = { 0, 0.30 }, -- endash - [0x2014] = { 0, 0.20 }, -- emdash - [0x060C] = { 0, 0.70 }, -- arabic comma - [0x061B] = { 0, 0.50 }, -- arabic semicolon - [0x06D4] = { 0, 0.70 }, -- arabic full stop - [0x061F] = { 0, 0.20 }, -- ؟ - - -- todo: left and right quotes: .5 double, .7 single - - [0x2039] = { 0.70, 0.70 }, -- left single guillemet ‹ - [0x203A] = { 0.70, 0.70 }, -- right single guillemet › - [0x00AB] = { 0.50, 0.50 }, -- left guillemet « - [0x00BB] = { 0.50, 0.50 }, -- right guillemet » - - [0x2018] = { 0.70, 0.70 }, -- left single quotation mark ‘ - [0x2019] = { 0, 0.70 }, -- right single quotation mark ’ - [0x201A] = { 0.70, 0 }, -- single low-9 quotation mark , - [0x201B] = { 0.70, 0 }, -- single high-reversed-9 quotation mark ‛ - [0x201C] = { 0.50, 0.50 }, -- left double quotation mark “ - [0x201D] = { 0, 0.50 }, -- right double quotation mark ” - [0x201E] = { 0.50, 0 }, -- double low-9 quotation mark „ - [0x201F] = { 0.50, 0 }, -- double high-reversed-9 quotation mark ‟ - -} - -vectors['alpha'] = { - - [byte("A")] = { .05, .05 }, - [byte("F")] = { 0, .05 }, - [byte("J")] = { .05, 0 }, - [byte("K")] = { 0, .05 }, - [byte("L")] = { 0, .05 }, - [byte("T")] = { .05, .05 }, - [byte("V")] = { .05, .05 }, - [byte("W")] = { .05, .05 }, - [byte("X")] = { .05, .05 }, - [byte("Y")] = { .05, .05 }, - - [byte("k")] = { 0, .05 }, - [byte("r")] = { 0, .05 }, - [byte("t")] = { 0, .05 }, - [byte("v")] = { .05, .05 }, - [byte("w")] = { .05, .05 }, - [byte("x")] = { .05, .05 }, - [byte("y")] = { .05, .05 }, - -} - -vectors['quality'] = table.merged( - vectors['punctuation'], - vectors['alpha'] -) - --- As this is experimental code, users should not depend on it. The --- implications are still discussed on the ConTeXt Dev List and we're --- not sure yet what exactly the spec is (the next code is tested with --- a gyre font patched by / fea file made by Khaled Hosny). The double --- trick should not be needed it proper hanging punctuation is used in --- which case values < 1 can be used. --- --- preferred (in context, usine vectors): --- --- \definefontfeature[whatever][default][mode=node,protrusion=quality] --- --- using lfbd and rtbd, with possibibility to enable only one side : --- --- \definefontfeature[whocares][default][mode=node,protrusion=yes, opbd=yes,script=latn] --- \definefontfeature[whocares][default][mode=node,protrusion=right,opbd=yes,script=latn] --- --- idem, using multiplier --- --- \definefontfeature[whocares][default][mode=node,protrusion=2,opbd=yes,script=latn] --- \definefontfeature[whocares][default][mode=node,protrusion=double,opbd=yes,script=latn] --- --- idem, using named feature file (less frozen): --- --- \definefontfeature[whocares][default][mode=node,protrusion=2,opbd=yes,script=latn,featurefile=texgyrepagella-regularxx.fea] - -classes['double'] = { -- for testing opbd - factor = 2, left = 1, right = 1, -} - -local function map_opbd_onto_protrusion(tfmdata,value,opbd) - local characters = tfmdata.characters - local descriptions = tfmdata.descriptions - local properties = tfmdata.properties - local rawdata = tfmdata.shared.rawdata - local lookuphash = rawdata.lookuphash - local script = properties.script - local language = properties.language - local done, factor, left, right = false, 1, 1, 1 - local class = classes[value] - if class then - factor = class.factor or 1 - left = class.left or 1 - right = class.right or 1 - else - factor = tonumber(value) or 1 - end - if opbd ~= "right" then - local validlookups, lookuplist = otf.collectlookups(rawdata,"lfbd",script,language) - if validlookups then - for i=1,#lookuplist do - local lookup = lookuplist[i] - local data = lookuphash[lookup] - if data then - if trace_protrusion then - report_protrusions("setting left using lfbd lookup %a",lookup) - end - for k, v in next, data do - -- local p = - v[3] / descriptions[k].width-- or 1 ~= 0 too but the same - local p = - (v[1] / 1000) * factor * left - characters[k].left_protruding = p - if trace_protrusion then - report_protrusions("lfbd -> %s -> %C -> %0.03f (% t)",lookup,k,p,v) - end - end - done = true - end - end - end - end - if opbd ~= "left" then - local validlookups, lookuplist = otf.collectlookups(rawdata,"rtbd",script,language) - if validlookups then - for i=1,#lookuplist do - local lookup = lookuplist[i] - local data = lookuphash[lookup] - if data then - if trace_protrusion then - report_protrusions("setting right using rtbd lookup %a",lookup) - end - for k, v in next, data do - -- local p = v[3] / descriptions[k].width -- or 3 - local p = (v[1] / 1000) * factor * right - characters[k].right_protruding = p - if trace_protrusion then - report_protrusions("rtbd -> %s -> %C -> %0.03f (% t)",lookup,k,p,v) - end - end - end - done = true - end - end - end - local parameters = tfmdata.parameters - local protrusion = tfmdata.protrusion - if not protrusion then - parameters.protrusion = { - auto = true - } - else - protrusion.auto = true - end -end - --- The opbd test is just there because it was discussed on the --- context development list. However, the mentioned fxlbi.otf font --- only has some kerns for digits. So, consider this feature not --- supported till we have a proper test font. - -local function initializeprotrusion(tfmdata,value) - if value then - local opbd = tfmdata.shared.features.opbd - if opbd then - -- possible values: left right both yes no (experimental) - map_opbd_onto_protrusion(tfmdata,value,opbd) - else - local class, vector = get_class_and_vector(tfmdata,value,"protrusions") - if class then - if vector then - local factor = class.factor or 1 - local left = class.left or 1 - local right = class.right or 1 - if trace_protrusion then - report_protrusions("setting class %a, vector %a, factor %a, left %a, right %a", - value,class.vector,factor,left,right) - end - local data = characters.data - local emwidth = tfmdata.parameters.quad - tfmdata.parameters.protrusion = { - factor = factor, - left = left, - right = right, - auto = true, - } - for i, chr in next, tfmdata.characters do - local v, pl, pr = vector[i], nil, nil - if v then - pl, pr = v[1], v[2] - else - local d = data[i] - if d then - local s = d.shcode - if not s then - -- sorry - elseif type(s) == "table" then - local vl, vr = vector[s[1]], vector[s[#s]] - if vl then pl = vl[1] end - if vr then pr = vr[2] end - else - v = vector[s] - if v then - pl, pr = v[1], v[2] - end - end - end - end - if pl and pl ~= 0 then - chr.left_protruding = left *pl*factor - end - if pr and pr ~= 0 then - chr.right_protruding = right*pr*factor - end - end - elseif trace_protrusion then - report_protrusions("unknown vector %a in class %a",class.vector,value) - end - elseif trace_protrusion then - report_protrusions("unknown class %a",value) - end - end - end -end - -registerotffeature { - name = "protrusion", - description = "shift characters into the left and or right margin", - initializers = { - base = initializeprotrusion, - node = initializeprotrusion, - } -} - -registerafmfeature { - name = "protrusion", - description = "shift characters into the left and or right margin", - initializers = { - base = initializeprotrusion, - node = initializeprotrusion, - } -} - -fonts.goodies.register("protrusions", function(...) return fonts.goodies.report("protrusions", trace_protrusion, ...) end) - --- -- -- - -local function initializenostackmath(tfmdata,value) - tfmdata.properties.nostackmath = value and true -end - -registerotffeature { - name = "nostackmath", - description = "disable math stacking mechanism", - initializers = { - base = initializenostackmath, - node = initializenostackmath, - } -} - -local function initializeitlc(tfmdata,value) -- hm, always value - if value then - -- the magic 40 and it formula come from Dohyun Kim but we might need another guess - local parameters = tfmdata.parameters - local italicangle = parameters.italicangle - if italicangle and italicangle ~= 0 then - local properties = tfmdata.properties - local factor = tonumber(value) or 1 - properties.hasitalics = true - properties.autoitalicamount = factor * (parameters.uwidth or 40)/2 - end - end -end - -registerotffeature { - name = "itlc", - description = "italic correction", - initializers = { - base = initializeitlc, - node = initializeitlc, - } -} - -registerafmfeature { - name = "itlc", - description = "italic correction", - initializers = { - base = initializeitlc, - node = initializeitlc, - } -} - -local function initializetextitalics(tfmdata,value) -- yes no delay - local delay = value == "delay" - tfmdata.properties.textitalics = delay and true or value - tfmdata.properties.delaytextitalics = delay -end - -registerotffeature { - name = "textitalics", - description = "use alternative text italic correction", - initializers = { - base = initializetextitalics, - node = initializetextitalics, - } -} - -registerafmfeature { - name = "textitalics", - description = "use alternative text italic correction", - initializers = { - base = initializetextitalics, - node = initializetextitalics, - } -} - --- slanting - -local function initializeslant(tfmdata,value) - value = tonumber(value) - if not value then - value = 0 - elseif value > 1 then - value = 1 - elseif value < -1 then - value = -1 - end - tfmdata.parameters.slantfactor = value -end - -registerotffeature { - name = "slant", - description = "slant glyphs", - initializers = { - base = initializeslant, - node = initializeslant, - } -} - -registerafmfeature { - name = "slant", - description = "slant glyphs", - initializers = { - base = initializeslant, - node = initializeslant, - } -} - -local function initializeextend(tfmdata,value) - value = tonumber(value) - if not value then - value = 0 - elseif value > 10 then - value = 10 - elseif value < -10 then - value = -10 - end - tfmdata.parameters.extendfactor = value -end - -registerotffeature { - name = "extend", - description = "scale glyphs horizontally", - initializers = { - base = initializeextend, - node = initializeextend, - } -} - -registerafmfeature { - name = "extend", - description = "scale glyphs horizontally", - initializers = { - base = initializeextend, - node = initializeextend, - } -} - --- For Wolfgang Schuster: --- --- \definefontfeature[thisway][default][script=hang,language=zhs,dimensions={2,2,2}] --- \definedfont[file:kozminpr6nregular*thisway] --- --- For the moment we don't mess with the descriptions. - -local function manipulatedimensions(tfmdata,key,value) - if type(value) == "string" and value ~= "" then - local characters = tfmdata.characters - local parameters = tfmdata.parameters - local emwidth = parameters.quad - local exheight = parameters.xheight - local spec = settings_to_array(value) - local width = (spec[1] or 0) * emwidth - local height = (spec[2] or 0) * exheight - local depth = (spec[3] or 0) * exheight - if width > 0 then - local resources = tfmdata.resources - local additions = { } - local private = resources.private - for unicode, old_c in next, characters do - local oldwidth = old_c.width - if oldwidth ~= width then - -- Defining the tables in one step is more efficient - -- than adding fields later. - private = private + 1 - local new_c - local commands = { - { "right", (width - oldwidth) / 2 }, - { "slot", 1, private }, - } - if height > 0 then - if depth > 0 then - new_c = { - width = width, - height = height, - depth = depth, - commands = commands, - } - else - new_c = { - width = width, - height = height, - commands = commands, - } - end - else - if depth > 0 then - new_c = { - width = width, - depth = depth, - commands = commands, - } - else - new_c = { - width = width, - commands = commands, - } - end - end - setmetatableindex(new_c,old_c) - characters[unicode] = new_c - additions[private] = old_c - end - end - for k, v in next, additions do - characters[k] = v - end - resources.private = private - elseif height > 0 and depth > 0 then - for unicode, old_c in next, characters do - old_c.height = height - old_c.depth = depth - end - elseif height > 0 then - for unicode, old_c in next, characters do - old_c.height = height - end - elseif depth > 0 then - for unicode, old_c in next, characters do - old_c.depth = depth - end - end - end -end - -registerotffeature { - name = "dimensions", - description = "force dimensions", - manipulators = { - base = manipulatedimensions, - node = manipulatedimensions, - } -} - --- for zhichu chen (see mailing list archive): we might add a few more variants --- in due time --- --- \definefontfeature[boxed][default][boundingbox=yes] % paleblue --- --- maybe: --- --- \definecolor[DummyColor][s=.75,t=.5,a=1] {\DummyColor test} \nopdfcompression --- --- local gray = { "special", "pdf: /Tr1 gs .75 g" } --- local black = { "special", "pdf: /Tr0 gs 0 g" } - -local push = { "push" } -local pop = { "pop" } -local gray = { "special", "pdf: .75 g" } -local black = { "special", "pdf: 0 g" } - -local downcache = { } -- handy for huge cjk fonts -local rulecache = { } -- handy for huge cjk fonts - -setmetatableindex(downcache,function(t,d) - local v = { "down", d } - t[d] = v - return v -end) - -setmetatableindex(rulecache,function(t,h) - local v = { } - t[h] = v - setmetatableindex(v,function(t,w) - local v = { "rule", h, w } - t[w] = v - return v - end) - return v -end) - -local function showboundingbox(tfmdata,key,value) - if value then - local vfspecials = backends.pdf.tables.vfspecials - local gray = vfspecials and (vfspecials.rulecolors[value] or vfspecials.rulecolors.palegray) or gray - local characters = tfmdata.characters - local resources = tfmdata.resources - local additions = { } - local private = resources.private - for unicode, old_c in next, characters do - private = private + 1 - local width = old_c.width or 0 - local height = old_c.height or 0 - local depth = old_c.depth or 0 - local new_c - if depth == 0 then - new_c = { - width = width, - height = height, - commands = { - push, - gray, - rulecache[height][width], - black, - pop, - { "slot", 1, private }, - } - } - else - new_c = { - width = width, - height = height, - depth = depth, - commands = { - push, - downcache[depth], - gray, - rulecache[height+depth][width], - black, - pop, - { "slot", 1, private }, - } - } - end - setmetatableindex(new_c,old_c) - characters[unicode] = new_c - additions[private] = old_c - end - for k, v in next, additions do - characters[k] = v - end - resources.private = private - end -end - -registerotffeature { - name = "boundingbox", - description = "show boundingbox", - manipulators = { - base = showboundingbox, - node = showboundingbox, - } -} - --- -- historic stuff, move from font-ota (handled differently, typo-rep) --- --- local delete_node = nodes.delete --- local fontdata = fonts.hashes.identifiers --- --- local nodecodes = nodes.nodecodes --- local glyph_code = nodecodes.glyph --- --- local strippables = allocate() --- fonts.strippables = strippables --- --- strippables.joiners = table.tohash { --- 0x200C, -- zwnj --- 0x200D, -- zwj --- } --- --- strippables.all = table.tohash { --- 0x000AD, 0x017B4, 0x017B5, 0x0200B, 0x0200C, 0x0200D, 0x0200E, 0x0200F, 0x0202A, 0x0202B, --- 0x0202C, 0x0202D, 0x0202E, 0x02060, 0x02061, 0x02062, 0x02063, 0x0206A, 0x0206B, 0x0206C, --- 0x0206D, 0x0206E, 0x0206F, 0x0FEFF, 0x1D173, 0x1D174, 0x1D175, 0x1D176, 0x1D177, 0x1D178, --- 0x1D179, 0x1D17A, 0xE0001, 0xE0020, 0xE0021, 0xE0022, 0xE0023, 0xE0024, 0xE0025, 0xE0026, --- 0xE0027, 0xE0028, 0xE0029, 0xE002A, 0xE002B, 0xE002C, 0xE002D, 0xE002E, 0xE002F, 0xE0030, --- 0xE0031, 0xE0032, 0xE0033, 0xE0034, 0xE0035, 0xE0036, 0xE0037, 0xE0038, 0xE0039, 0xE003A, --- 0xE003B, 0xE003C, 0xE003D, 0xE003E, 0xE003F, 0xE0040, 0xE0041, 0xE0042, 0xE0043, 0xE0044, --- 0xE0045, 0xE0046, 0xE0047, 0xE0048, 0xE0049, 0xE004A, 0xE004B, 0xE004C, 0xE004D, 0xE004E, --- 0xE004F, 0xE0050, 0xE0051, 0xE0052, 0xE0053, 0xE0054, 0xE0055, 0xE0056, 0xE0057, 0xE0058, --- 0xE0059, 0xE005A, 0xE005B, 0xE005C, 0xE005D, 0xE005E, 0xE005F, 0xE0060, 0xE0061, 0xE0062, --- 0xE0063, 0xE0064, 0xE0065, 0xE0066, 0xE0067, 0xE0068, 0xE0069, 0xE006A, 0xE006B, 0xE006C, --- 0xE006D, 0xE006E, 0xE006F, 0xE0070, 0xE0071, 0xE0072, 0xE0073, 0xE0074, 0xE0075, 0xE0076, --- 0xE0077, 0xE0078, 0xE0079, 0xE007A, 0xE007B, 0xE007C, 0xE007D, 0xE007E, 0xE007F, --- } --- --- strippables[true] = strippables.joiners --- --- local function processformatters(head,font) --- local subset = fontdata[font].shared.features.formatters --- local vector = subset and strippables[subset] --- if vector then --- local current, done = head, false --- while current do --- if current.id == glyph_code and current.subtype<256 and current.font == font then --- local char = current.char --- if vector[char] then --- head, current = delete_node(head,current) --- done = true --- else --- current = current.next --- end --- else --- current = current.next --- end --- end --- return head, done --- else --- return head, false --- end --- end --- --- registerotffeature { --- name = "formatters", --- description = "hide formatting characters", --- methods = { --- base = processformatters, --- node = processformatters, --- } --- } - --- a handy helper (might change or be moved to another namespace) - -local new_special = nodes.pool.special -local new_glyph = nodes.pool.glyph -local hpack_node = node.hpack - -function fonts.helpers.addprivate(tfmdata,name,characterdata) - local properties = tfmdata.properties - local privates = properties.privates - local lastprivate = properties.lastprivate - if lastprivate then - lastprivate = lastprivate + 1 - else - lastprivate = 0xE000 - end - if not privates then - privates = { } - properties.privates = privates - end - if name then - privates[name] = lastprivate - end - properties.lastprivate = lastprivate - tfmdata.characters[lastprivate] = characterdata - if properties.finalized then - properties.lateprivates = true - end - return lastprivate -end - -function fonts.helpers.getprivatenode(tfmdata,name) - local properties = tfmdata.properties - local privates = properties and properties.privates - if privates then - local p = privates[name] - if p then - local char = tfmdata.characters[p] - local commands = char.commands - if commands then - local fake = hpack_node(new_special(commands[1][2])) - fake.width = char.width - fake.height = char.height - fake.depth = char.depth - return fake - else - -- todo: set current attribibutes - return new_glyph(properties.id,p) - end - end - end -end - -function fonts.helpers.hasprivate(tfmdata,name) - local properties = tfmdata.properties - local privates = properties and properties.privates - return privates and privates[name] or false -end - -function commands.getprivatechar(name) - context(fonts.helpers.getprivatenode(fontdata[font.current()],name)) -end +if not modules then modules = { } end modules ['font-ext'] = {
+ version = 1.001,
+ comment = "companion to font-ini.mkiv and hand-ini.mkiv",
+ author = "Hans Hagen, PRAGMA-ADE, Hasselt NL",
+ copyright = "PRAGMA ADE / ConTeXt Development Team",
+ license = "see context related readme files"
+}
+
+local next, type, byte = next, type, string.byte
+local gmatch, concat, format = string.gmatch, table.concat, string.format
+local utfchar = utf.char
+
+local commands, context = commands, context
+local fonts, utilities = fonts, utilities
+
+local trace_protrusion = false trackers.register("fonts.protrusion", function(v) trace_protrusion = v end)
+local trace_expansion = false trackers.register("fonts.expansion", function(v) trace_expansion = v end)
+
+local report_expansions = logs.reporter("fonts","expansions")
+local report_protrusions = logs.reporter("fonts","protrusions")
+
+-- todo: byte(..) => 0xHHHH
+
+--[[ldx--
+<p>When we implement functions that deal with features, most of them
+will depend of the font format. Here we define the few that are kind
+of neutral.</p>
+--ldx]]--
+
+local handlers = fonts.handlers
+local hashes = fonts.hashes
+local otf = handlers.otf
+
+local registerotffeature = handlers.otf.features.register
+local registerafmfeature = handlers.afm.features.register
+
+local fontdata = hashes.identifiers
+
+local allocate = utilities.storage.allocate
+local settings_to_array = utilities.parsers.settings_to_array
+local getparameters = utilities.parsers.getparameters
+
+local setmetatableindex = table.setmetatableindex
+
+-- -- -- -- -- --
+-- shared
+-- -- -- -- -- --
+
+local function get_class_and_vector(tfmdata,value,where) -- "expansions"
+ local g_where = tfmdata.goodies and tfmdata.goodies[where]
+ local f_where = fonts[where]
+ local g_classes = g_where and g_where.classes
+ local f_classes = f_where and f_where.classes
+ local class = (g_classes and g_classes[value]) or (f_classes and f_classes[value])
+ if class then
+ local class_vector = class.vector
+ local g_vectors = g_where and g_where.vectors
+ local f_vectors = f_where and f_where.vectors
+ local vector = (g_vectors and g_vectors[class_vector]) or (f_vectors and f_vectors[class_vector])
+ return class, vector
+ end
+end
+
+-- -- -- -- -- --
+-- expansion (hz)
+-- -- -- -- -- --
+
+local expansions = fonts.expansions or allocate()
+
+fonts.expansions = expansions
+
+local classes = expansions.classes or allocate()
+local vectors = expansions.vectors or allocate()
+
+expansions.classes = classes
+expansions.vectors = vectors
+
+-- beware, pdftex itself uses percentages * 10
+
+classes.preset = { stretch = 2, shrink = 2, step = .5, factor = 1 }
+
+function commands.setupfontexpansion(class,settings)
+ getparameters(classes,class,'preset',settings)
+end
+
+classes['quality'] = {
+ stretch = 2, shrink = 2, step = .5, vector = 'default', factor = 1
+}
+
+vectors['default'] = {
+ [byte('A')] = 0.5, [byte('B')] = 0.7, [byte('C')] = 0.7, [byte('D')] = 0.5, [byte('E')] = 0.7,
+ [byte('F')] = 0.7, [byte('G')] = 0.5, [byte('H')] = 0.7, [byte('K')] = 0.7, [byte('M')] = 0.7,
+ [byte('N')] = 0.7, [byte('O')] = 0.5, [byte('P')] = 0.7, [byte('Q')] = 0.5, [byte('R')] = 0.7,
+ [byte('S')] = 0.7, [byte('U')] = 0.7, [byte('W')] = 0.7, [byte('Z')] = 0.7,
+ [byte('a')] = 0.7, [byte('b')] = 0.7, [byte('c')] = 0.7, [byte('d')] = 0.7, [byte('e')] = 0.7,
+ [byte('g')] = 0.7, [byte('h')] = 0.7, [byte('k')] = 0.7, [byte('m')] = 0.7, [byte('n')] = 0.7,
+ [byte('o')] = 0.7, [byte('p')] = 0.7, [byte('q')] = 0.7, [byte('s')] = 0.7, [byte('u')] = 0.7,
+ [byte('w')] = 0.7, [byte('z')] = 0.7,
+ [byte('2')] = 0.7, [byte('3')] = 0.7, [byte('6')] = 0.7, [byte('8')] = 0.7, [byte('9')] = 0.7,
+}
+
+vectors['quality'] = vectors['default'] -- metatable ?
+
+local function initializeexpansion(tfmdata,value)
+ if value then
+ local class, vector = get_class_and_vector(tfmdata,value,"expansions")
+ if class then
+ if vector then
+ local stretch = class.stretch or 0
+ local shrink = class.shrink or 0
+ local step = class.step or 0
+ local factor = class.factor or 1
+ if trace_expansion then
+ report_expansions("setting class %a, vector %a, factor %a, stretch %a, shrink %a, step %a",
+ value,class.vector,factor,stretch,shrink,step)
+ end
+ tfmdata.parameters.expansion = {
+ stretch = 10 * stretch,
+ shrink = 10 * shrink,
+ step = 10 * step,
+ factor = factor,
+ auto = true,
+ }
+ local data = characters and characters.data
+ for i, chr in next, tfmdata.characters do
+ local v = vector[i]
+ if data and not v then -- we could move the data test outside (needed for plain)
+ local d = data[i]
+ if d then
+ local s = d.shcode
+ if not s then
+ -- sorry
+ elseif type(s) == "table" then
+ v = ((vector[s[1]] or 0) + (vector[s[#s]] or 0)) / 2
+ else
+ v = vector[s] or 0
+ end
+ end
+ end
+ if v and v ~= 0 then
+ chr.expansion_factor = v*factor
+ else -- can be option
+ chr.expansion_factor = factor
+ end
+ end
+ elseif trace_expansion then
+ report_expansions("unknown vector %a in class %a",class.vector,value)
+ end
+ elseif trace_expansion then
+ report_expansions("unknown class %a",value)
+ end
+ end
+end
+
+registerotffeature {
+ name = "expansion",
+ description = "apply hz optimization",
+ initializers = {
+ base = initializeexpansion,
+ node = initializeexpansion,
+ }
+}
+
+registerafmfeature {
+ name = "expansion",
+ description = "apply hz optimization",
+ initializers = {
+ base = initializeexpansion,
+ node = initializeexpansion,
+ }
+}
+
+fonts.goodies.register("expansions", function(...) return fonts.goodies.report("expansions", trace_expansion, ...) end)
+
+local report_opbd = logs.reporter("fonts","otf opbd")
+
+-- -- -- -- -- --
+-- protrusion
+-- -- -- -- -- --
+
+fonts.protrusions = allocate()
+local protrusions = fonts.protrusions
+
+protrusions.classes = allocate()
+protrusions.vectors = allocate()
+
+local classes = protrusions.classes
+local vectors = protrusions.vectors
+
+-- the values need to be revisioned
+
+classes.preset = { factor = 1, left = 1, right = 1 }
+
+function commands.setupfontprotrusion(class,settings)
+ getparameters(classes,class,'preset',settings)
+end
+
+classes['pure'] = {
+ vector = 'pure', factor = 1
+}
+classes['punctuation'] = {
+ vector = 'punctuation', factor = 1
+}
+classes['alpha'] = {
+ vector = 'alpha', factor = 1
+}
+classes['quality'] = {
+ vector = 'quality', factor = 1
+}
+
+vectors['pure'] = {
+
+ [0x002C] = { 0, 1 }, -- comma
+ [0x002E] = { 0, 1 }, -- period
+ [0x003A] = { 0, 1 }, -- colon
+ [0x003B] = { 0, 1 }, -- semicolon
+ [0x002D] = { 0, 1 }, -- hyphen
+ [0x00AD] = { 0, 1 }, -- also hyphen
+ [0x2013] = { 0, 0.50 }, -- endash
+ [0x2014] = { 0, 0.33 }, -- emdash
+ [0x3001] = { 0, 1 }, -- ideographic comma 、
+ [0x3002] = { 0, 1 }, -- ideographic full stop 。
+ [0x060C] = { 0, 1 }, -- arabic comma ،
+ [0x061B] = { 0, 1 }, -- arabic semicolon ؛
+ [0x06D4] = { 0, 1 }, -- arabic full stop ۔
+
+}
+
+vectors['punctuation'] = {
+
+ [0x003F] = { 0, 0.20 }, -- ?
+ [0x00BF] = { 0, 0.20 }, -- ¿
+ [0x0021] = { 0, 0.20 }, -- !
+ [0x00A1] = { 0, 0.20 }, -- ¡
+ [0x0028] = { 0.05, 0 }, -- (
+ [0x0029] = { 0, 0.05 }, -- )
+ [0x005B] = { 0.05, 0 }, -- [
+ [0x005D] = { 0, 0.05 }, -- ]
+ [0x002C] = { 0, 0.70 }, -- comma
+ [0x002E] = { 0, 0.70 }, -- period
+ [0x003A] = { 0, 0.50 }, -- colon
+ [0x003B] = { 0, 0.50 }, -- semicolon
+ [0x002D] = { 0, 0.70 }, -- hyphen
+ [0x00AD] = { 0, 0.70 }, -- also hyphen
+ [0x2013] = { 0, 0.30 }, -- endash
+ [0x2014] = { 0, 0.20 }, -- emdash
+ [0x060C] = { 0, 0.70 }, -- arabic comma
+ [0x061B] = { 0, 0.50 }, -- arabic semicolon
+ [0x06D4] = { 0, 0.70 }, -- arabic full stop
+ [0x061F] = { 0, 0.20 }, -- ؟
+
+ -- todo: left and right quotes: .5 double, .7 single
+
+ [0x2039] = { 0.70, 0.70 }, -- left single guillemet ‹
+ [0x203A] = { 0.70, 0.70 }, -- right single guillemet ›
+ [0x00AB] = { 0.50, 0.50 }, -- left guillemet «
+ [0x00BB] = { 0.50, 0.50 }, -- right guillemet »
+
+ [0x2018] = { 0.70, 0.70 }, -- left single quotation mark ‘
+ [0x2019] = { 0, 0.70 }, -- right single quotation mark ’
+ [0x201A] = { 0.70, 0 }, -- single low-9 quotation mark ,
+ [0x201B] = { 0.70, 0 }, -- single high-reversed-9 quotation mark ‛
+ [0x201C] = { 0.50, 0.50 }, -- left double quotation mark “
+ [0x201D] = { 0, 0.50 }, -- right double quotation mark ”
+ [0x201E] = { 0.50, 0 }, -- double low-9 quotation mark „
+ [0x201F] = { 0.50, 0 }, -- double high-reversed-9 quotation mark ‟
+
+}
+
+vectors['alpha'] = {
+
+ [byte("A")] = { .05, .05 },
+ [byte("F")] = { 0, .05 },
+ [byte("J")] = { .05, 0 },
+ [byte("K")] = { 0, .05 },
+ [byte("L")] = { 0, .05 },
+ [byte("T")] = { .05, .05 },
+ [byte("V")] = { .05, .05 },
+ [byte("W")] = { .05, .05 },
+ [byte("X")] = { .05, .05 },
+ [byte("Y")] = { .05, .05 },
+
+ [byte("k")] = { 0, .05 },
+ [byte("r")] = { 0, .05 },
+ [byte("t")] = { 0, .05 },
+ [byte("v")] = { .05, .05 },
+ [byte("w")] = { .05, .05 },
+ [byte("x")] = { .05, .05 },
+ [byte("y")] = { .05, .05 },
+
+}
+
+vectors['quality'] = table.merged(
+ vectors['punctuation'],
+ vectors['alpha']
+)
+
+-- As this is experimental code, users should not depend on it. The
+-- implications are still discussed on the ConTeXt Dev List and we're
+-- not sure yet what exactly the spec is (the next code is tested with
+-- a gyre font patched by / fea file made by Khaled Hosny). The double
+-- trick should not be needed it proper hanging punctuation is used in
+-- which case values < 1 can be used.
+--
+-- preferred (in context, usine vectors):
+--
+-- \definefontfeature[whatever][default][mode=node,protrusion=quality]
+--
+-- using lfbd and rtbd, with possibibility to enable only one side :
+--
+-- \definefontfeature[whocares][default][mode=node,protrusion=yes, opbd=yes,script=latn]
+-- \definefontfeature[whocares][default][mode=node,protrusion=right,opbd=yes,script=latn]
+--
+-- idem, using multiplier
+--
+-- \definefontfeature[whocares][default][mode=node,protrusion=2,opbd=yes,script=latn]
+-- \definefontfeature[whocares][default][mode=node,protrusion=double,opbd=yes,script=latn]
+--
+-- idem, using named feature file (less frozen):
+--
+-- \definefontfeature[whocares][default][mode=node,protrusion=2,opbd=yes,script=latn,featurefile=texgyrepagella-regularxx.fea]
+
+classes['double'] = { -- for testing opbd
+ factor = 2, left = 1, right = 1,
+}
+
+local function map_opbd_onto_protrusion(tfmdata,value,opbd)
+ local characters = tfmdata.characters
+ local descriptions = tfmdata.descriptions
+ local properties = tfmdata.properties
+ local rawdata = tfmdata.shared.rawdata
+ local lookuphash = rawdata.lookuphash
+ local script = properties.script
+ local language = properties.language
+ local done, factor, left, right = false, 1, 1, 1
+ local class = classes[value]
+ if class then
+ factor = class.factor or 1
+ left = class.left or 1
+ right = class.right or 1
+ else
+ factor = tonumber(value) or 1
+ end
+ if opbd ~= "right" then
+ local validlookups, lookuplist = otf.collectlookups(rawdata,"lfbd",script,language)
+ if validlookups then
+ for i=1,#lookuplist do
+ local lookup = lookuplist[i]
+ local data = lookuphash[lookup]
+ if data then
+ if trace_protrusion then
+ report_protrusions("setting left using lfbd lookup %a",lookup)
+ end
+ for k, v in next, data do
+ -- local p = - v[3] / descriptions[k].width-- or 1 ~= 0 too but the same
+ local p = - (v[1] / 1000) * factor * left
+ characters[k].left_protruding = p
+ if trace_protrusion then
+ report_protrusions("lfbd -> %s -> %C -> %0.03f (% t)",lookup,k,p,v)
+ end
+ end
+ done = true
+ end
+ end
+ end
+ end
+ if opbd ~= "left" then
+ local validlookups, lookuplist = otf.collectlookups(rawdata,"rtbd",script,language)
+ if validlookups then
+ for i=1,#lookuplist do
+ local lookup = lookuplist[i]
+ local data = lookuphash[lookup]
+ if data then
+ if trace_protrusion then
+ report_protrusions("setting right using rtbd lookup %a",lookup)
+ end
+ for k, v in next, data do
+ -- local p = v[3] / descriptions[k].width -- or 3
+ local p = (v[1] / 1000) * factor * right
+ characters[k].right_protruding = p
+ if trace_protrusion then
+ report_protrusions("rtbd -> %s -> %C -> %0.03f (% t)",lookup,k,p,v)
+ end
+ end
+ end
+ done = true
+ end
+ end
+ end
+ local parameters = tfmdata.parameters
+ local protrusion = tfmdata.protrusion
+ if not protrusion then
+ parameters.protrusion = {
+ auto = true
+ }
+ else
+ protrusion.auto = true
+ end
+end
+
+-- The opbd test is just there because it was discussed on the
+-- context development list. However, the mentioned fxlbi.otf font
+-- only has some kerns for digits. So, consider this feature not
+-- supported till we have a proper test font.
+
+local function initializeprotrusion(tfmdata,value)
+ if value then
+ local opbd = tfmdata.shared.features.opbd
+ if opbd then
+ -- possible values: left right both yes no (experimental)
+ map_opbd_onto_protrusion(tfmdata,value,opbd)
+ else
+ local class, vector = get_class_and_vector(tfmdata,value,"protrusions")
+ if class then
+ if vector then
+ local factor = class.factor or 1
+ local left = class.left or 1
+ local right = class.right or 1
+ if trace_protrusion then
+ report_protrusions("setting class %a, vector %a, factor %a, left %a, right %a",
+ value,class.vector,factor,left,right)
+ end
+ local data = characters.data
+ local emwidth = tfmdata.parameters.quad
+ tfmdata.parameters.protrusion = {
+ factor = factor,
+ left = left,
+ right = right,
+ auto = true,
+ }
+ for i, chr in next, tfmdata.characters do
+ local v, pl, pr = vector[i], nil, nil
+ if v then
+ pl, pr = v[1], v[2]
+ else
+ local d = data[i]
+ if d then
+ local s = d.shcode
+ if not s then
+ -- sorry
+ elseif type(s) == "table" then
+ local vl, vr = vector[s[1]], vector[s[#s]]
+ if vl then pl = vl[1] end
+ if vr then pr = vr[2] end
+ else
+ v = vector[s]
+ if v then
+ pl, pr = v[1], v[2]
+ end
+ end
+ end
+ end
+ if pl and pl ~= 0 then
+ chr.left_protruding = left *pl*factor
+ end
+ if pr and pr ~= 0 then
+ chr.right_protruding = right*pr*factor
+ end
+ end
+ elseif trace_protrusion then
+ report_protrusions("unknown vector %a in class %a",class.vector,value)
+ end
+ elseif trace_protrusion then
+ report_protrusions("unknown class %a",value)
+ end
+ end
+ end
+end
+
+registerotffeature {
+ name = "protrusion",
+ description = "shift characters into the left and or right margin",
+ initializers = {
+ base = initializeprotrusion,
+ node = initializeprotrusion,
+ }
+}
+
+registerafmfeature {
+ name = "protrusion",
+ description = "shift characters into the left and or right margin",
+ initializers = {
+ base = initializeprotrusion,
+ node = initializeprotrusion,
+ }
+}
+
+fonts.goodies.register("protrusions", function(...) return fonts.goodies.report("protrusions", trace_protrusion, ...) end)
+
+-- -- --
+
+local function initializenostackmath(tfmdata,value)
+ tfmdata.properties.nostackmath = value and true
+end
+
+registerotffeature {
+ name = "nostackmath",
+ description = "disable math stacking mechanism",
+ initializers = {
+ base = initializenostackmath,
+ node = initializenostackmath,
+ }
+}
+
+local function initializeitlc(tfmdata,value) -- hm, always value
+ if value then
+ -- the magic 40 and it formula come from Dohyun Kim but we might need another guess
+ local parameters = tfmdata.parameters
+ local italicangle = parameters.italicangle
+ if italicangle and italicangle ~= 0 then
+ local properties = tfmdata.properties
+ local factor = tonumber(value) or 1
+ properties.hasitalics = true
+ properties.autoitalicamount = factor * (parameters.uwidth or 40)/2
+ end
+ end
+end
+
+registerotffeature {
+ name = "itlc",
+ description = "italic correction",
+ initializers = {
+ base = initializeitlc,
+ node = initializeitlc,
+ }
+}
+
+registerafmfeature {
+ name = "itlc",
+ description = "italic correction",
+ initializers = {
+ base = initializeitlc,
+ node = initializeitlc,
+ }
+}
+
+local function initializetextitalics(tfmdata,value) -- yes no delay
+ local delay = value == "delay"
+ tfmdata.properties.textitalics = delay and true or value
+ tfmdata.properties.delaytextitalics = delay
+end
+
+registerotffeature {
+ name = "textitalics",
+ description = "use alternative text italic correction",
+ initializers = {
+ base = initializetextitalics,
+ node = initializetextitalics,
+ }
+}
+
+registerafmfeature {
+ name = "textitalics",
+ description = "use alternative text italic correction",
+ initializers = {
+ base = initializetextitalics,
+ node = initializetextitalics,
+ }
+}
+
+-- slanting
+
+local function initializeslant(tfmdata,value)
+ value = tonumber(value)
+ if not value then
+ value = 0
+ elseif value > 1 then
+ value = 1
+ elseif value < -1 then
+ value = -1
+ end
+ tfmdata.parameters.slantfactor = value
+end
+
+registerotffeature {
+ name = "slant",
+ description = "slant glyphs",
+ initializers = {
+ base = initializeslant,
+ node = initializeslant,
+ }
+}
+
+registerafmfeature {
+ name = "slant",
+ description = "slant glyphs",
+ initializers = {
+ base = initializeslant,
+ node = initializeslant,
+ }
+}
+
+local function initializeextend(tfmdata,value)
+ value = tonumber(value)
+ if not value then
+ value = 0
+ elseif value > 10 then
+ value = 10
+ elseif value < -10 then
+ value = -10
+ end
+ tfmdata.parameters.extendfactor = value
+end
+
+registerotffeature {
+ name = "extend",
+ description = "scale glyphs horizontally",
+ initializers = {
+ base = initializeextend,
+ node = initializeextend,
+ }
+}
+
+registerafmfeature {
+ name = "extend",
+ description = "scale glyphs horizontally",
+ initializers = {
+ base = initializeextend,
+ node = initializeextend,
+ }
+}
+
+-- For Wolfgang Schuster:
+--
+-- \definefontfeature[thisway][default][script=hang,language=zhs,dimensions={2,2,2}]
+-- \definedfont[file:kozminpr6nregular*thisway]
+--
+-- For the moment we don't mess with the descriptions.
+
+local function manipulatedimensions(tfmdata,key,value)
+ if type(value) == "string" and value ~= "" then
+ local characters = tfmdata.characters
+ local parameters = tfmdata.parameters
+ local emwidth = parameters.quad
+ local exheight = parameters.xheight
+ local spec = settings_to_array(value)
+ local width = (spec[1] or 0) * emwidth
+ local height = (spec[2] or 0) * exheight
+ local depth = (spec[3] or 0) * exheight
+ if width > 0 then
+ local resources = tfmdata.resources
+ local additions = { }
+ local private = resources.private
+ for unicode, old_c in next, characters do
+ local oldwidth = old_c.width
+ if oldwidth ~= width then
+ -- Defining the tables in one step is more efficient
+ -- than adding fields later.
+ private = private + 1
+ local new_c
+ local commands = {
+ { "right", (width - oldwidth) / 2 },
+ { "slot", 1, private },
+ }
+ if height > 0 then
+ if depth > 0 then
+ new_c = {
+ width = width,
+ height = height,
+ depth = depth,
+ commands = commands,
+ }
+ else
+ new_c = {
+ width = width,
+ height = height,
+ commands = commands,
+ }
+ end
+ else
+ if depth > 0 then
+ new_c = {
+ width = width,
+ depth = depth,
+ commands = commands,
+ }
+ else
+ new_c = {
+ width = width,
+ commands = commands,
+ }
+ end
+ end
+ setmetatableindex(new_c,old_c)
+ characters[unicode] = new_c
+ additions[private] = old_c
+ end
+ end
+ for k, v in next, additions do
+ characters[k] = v
+ end
+ resources.private = private
+ elseif height > 0 and depth > 0 then
+ for unicode, old_c in next, characters do
+ old_c.height = height
+ old_c.depth = depth
+ end
+ elseif height > 0 then
+ for unicode, old_c in next, characters do
+ old_c.height = height
+ end
+ elseif depth > 0 then
+ for unicode, old_c in next, characters do
+ old_c.depth = depth
+ end
+ end
+ end
+end
+
+registerotffeature {
+ name = "dimensions",
+ description = "force dimensions",
+ manipulators = {
+ base = manipulatedimensions,
+ node = manipulatedimensions,
+ }
+}
+
+-- for zhichu chen (see mailing list archive): we might add a few more variants
+-- in due time
+--
+-- \definefontfeature[boxed][default][boundingbox=yes] % paleblue
+--
+-- maybe:
+--
+-- \definecolor[DummyColor][s=.75,t=.5,a=1] {\DummyColor test} \nopdfcompression
+--
+-- local gray = { "special", "pdf: /Tr1 gs .75 g" }
+-- local black = { "special", "pdf: /Tr0 gs 0 g" }
+
+local push = { "push" }
+local pop = { "pop" }
+local gray = { "special", "pdf: .75 g" }
+local black = { "special", "pdf: 0 g" }
+
+local downcache = { } -- handy for huge cjk fonts
+local rulecache = { } -- handy for huge cjk fonts
+
+setmetatableindex(downcache,function(t,d)
+ local v = { "down", d }
+ t[d] = v
+ return v
+end)
+
+setmetatableindex(rulecache,function(t,h)
+ local v = { }
+ t[h] = v
+ setmetatableindex(v,function(t,w)
+ local v = { "rule", h, w }
+ t[w] = v
+ return v
+ end)
+ return v
+end)
+
+local function showboundingbox(tfmdata,key,value)
+ if value then
+ local vfspecials = backends.pdf.tables.vfspecials
+ local gray = vfspecials and (vfspecials.rulecolors[value] or vfspecials.rulecolors.palegray) or gray
+ local characters = tfmdata.characters
+ local resources = tfmdata.resources
+ local additions = { }
+ local private = resources.private
+ for unicode, old_c in next, characters do
+ private = private + 1
+ local width = old_c.width or 0
+ local height = old_c.height or 0
+ local depth = old_c.depth or 0
+ local new_c
+ if depth == 0 then
+ new_c = {
+ width = width,
+ height = height,
+ commands = {
+ push,
+ gray,
+ rulecache[height][width],
+ black,
+ pop,
+ { "slot", 1, private },
+ }
+ }
+ else
+ new_c = {
+ width = width,
+ height = height,
+ depth = depth,
+ commands = {
+ push,
+ downcache[depth],
+ gray,
+ rulecache[height+depth][width],
+ black,
+ pop,
+ { "slot", 1, private },
+ }
+ }
+ end
+ setmetatableindex(new_c,old_c)
+ characters[unicode] = new_c
+ additions[private] = old_c
+ end
+ for k, v in next, additions do
+ characters[k] = v
+ end
+ resources.private = private
+ end
+end
+
+registerotffeature {
+ name = "boundingbox",
+ description = "show boundingbox",
+ manipulators = {
+ base = showboundingbox,
+ node = showboundingbox,
+ }
+}
+
+-- -- historic stuff, move from font-ota (handled differently, typo-rep)
+--
+-- local delete_node = nodes.delete
+-- local fontdata = fonts.hashes.identifiers
+--
+-- local nodecodes = nodes.nodecodes
+-- local glyph_code = nodecodes.glyph
+--
+-- local strippables = allocate()
+-- fonts.strippables = strippables
+--
+-- strippables.joiners = table.tohash {
+-- 0x200C, -- zwnj
+-- 0x200D, -- zwj
+-- }
+--
+-- strippables.all = table.tohash {
+-- 0x000AD, 0x017B4, 0x017B5, 0x0200B, 0x0200C, 0x0200D, 0x0200E, 0x0200F, 0x0202A, 0x0202B,
+-- 0x0202C, 0x0202D, 0x0202E, 0x02060, 0x02061, 0x02062, 0x02063, 0x0206A, 0x0206B, 0x0206C,
+-- 0x0206D, 0x0206E, 0x0206F, 0x0FEFF, 0x1D173, 0x1D174, 0x1D175, 0x1D176, 0x1D177, 0x1D178,
+-- 0x1D179, 0x1D17A, 0xE0001, 0xE0020, 0xE0021, 0xE0022, 0xE0023, 0xE0024, 0xE0025, 0xE0026,
+-- 0xE0027, 0xE0028, 0xE0029, 0xE002A, 0xE002B, 0xE002C, 0xE002D, 0xE002E, 0xE002F, 0xE0030,
+-- 0xE0031, 0xE0032, 0xE0033, 0xE0034, 0xE0035, 0xE0036, 0xE0037, 0xE0038, 0xE0039, 0xE003A,
+-- 0xE003B, 0xE003C, 0xE003D, 0xE003E, 0xE003F, 0xE0040, 0xE0041, 0xE0042, 0xE0043, 0xE0044,
+-- 0xE0045, 0xE0046, 0xE0047, 0xE0048, 0xE0049, 0xE004A, 0xE004B, 0xE004C, 0xE004D, 0xE004E,
+-- 0xE004F, 0xE0050, 0xE0051, 0xE0052, 0xE0053, 0xE0054, 0xE0055, 0xE0056, 0xE0057, 0xE0058,
+-- 0xE0059, 0xE005A, 0xE005B, 0xE005C, 0xE005D, 0xE005E, 0xE005F, 0xE0060, 0xE0061, 0xE0062,
+-- 0xE0063, 0xE0064, 0xE0065, 0xE0066, 0xE0067, 0xE0068, 0xE0069, 0xE006A, 0xE006B, 0xE006C,
+-- 0xE006D, 0xE006E, 0xE006F, 0xE0070, 0xE0071, 0xE0072, 0xE0073, 0xE0074, 0xE0075, 0xE0076,
+-- 0xE0077, 0xE0078, 0xE0079, 0xE007A, 0xE007B, 0xE007C, 0xE007D, 0xE007E, 0xE007F,
+-- }
+--
+-- strippables[true] = strippables.joiners
+--
+-- local function processformatters(head,font)
+-- local subset = fontdata[font].shared.features.formatters
+-- local vector = subset and strippables[subset]
+-- if vector then
+-- local current, done = head, false
+-- while current do
+-- if current.id == glyph_code and current.subtype<256 and current.font == font then
+-- local char = current.char
+-- if vector[char] then
+-- head, current = delete_node(head,current)
+-- done = true
+-- else
+-- current = current.next
+-- end
+-- else
+-- current = current.next
+-- end
+-- end
+-- return head, done
+-- else
+-- return head, false
+-- end
+-- end
+--
+-- registerotffeature {
+-- name = "formatters",
+-- description = "hide formatting characters",
+-- methods = {
+-- base = processformatters,
+-- node = processformatters,
+-- }
+-- }
+
+-- a handy helper (might change or be moved to another namespace)
+
+local new_special = nodes.pool.special
+local new_glyph = nodes.pool.glyph
+local hpack_node = node.hpack
+
+function fonts.helpers.addprivate(tfmdata,name,characterdata)
+ local properties = tfmdata.properties
+ local privates = properties.privates
+ local lastprivate = properties.lastprivate
+ if lastprivate then
+ lastprivate = lastprivate + 1
+ else
+ lastprivate = 0xE000
+ end
+ if not privates then
+ privates = { }
+ properties.privates = privates
+ end
+ if name then
+ privates[name] = lastprivate
+ end
+ properties.lastprivate = lastprivate
+ tfmdata.characters[lastprivate] = characterdata
+ if properties.finalized then
+ properties.lateprivates = true
+ end
+ return lastprivate
+end
+
+function fonts.helpers.getprivatenode(tfmdata,name)
+ local properties = tfmdata.properties
+ local privates = properties and properties.privates
+ if privates then
+ local p = privates[name]
+ if p then
+ local char = tfmdata.characters[p]
+ local commands = char.commands
+ if commands then
+ local fake = hpack_node(new_special(commands[1][2]))
+ fake.width = char.width
+ fake.height = char.height
+ fake.depth = char.depth
+ return fake
+ else
+ -- todo: set current attribibutes
+ return new_glyph(properties.id,p)
+ end
+ end
+ end
+end
+
+function fonts.helpers.hasprivate(tfmdata,name)
+ local properties = tfmdata.properties
+ local privates = properties and properties.privates
+ return privates and privates[name] or false
+end
+
+function commands.getprivatechar(name)
+ context(fonts.helpers.getprivatenode(fontdata[font.current()],name))
+end
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