diff options
Diffstat (limited to 'Master/texmf-dist/tex/context/base/mkiv/font-imp-quality.lua')
| -rw-r--r-- | Master/texmf-dist/tex/context/base/mkiv/font-imp-quality.lua | 527 |
1 files changed, 0 insertions, 527 deletions
diff --git a/Master/texmf-dist/tex/context/base/mkiv/font-imp-quality.lua b/Master/texmf-dist/tex/context/base/mkiv/font-imp-quality.lua deleted file mode 100644 index 01f0afe6309..00000000000 --- a/Master/texmf-dist/tex/context/base/mkiv/font-imp-quality.lua +++ /dev/null @@ -1,527 +0,0 @@ -if not modules then modules = { } end modules ['font-imp-quality'] = { - 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" -} - -if not context then return end - -local next, type, tonumber = next, type, tonumber -local byte = string.byte -local insert = table.insert - -local fonts = fonts -local utilities = utilities - -local handlers = fonts.handlers -local otf = handlers.otf -local afm = handlers.afm -local registerotffeature = otf.features.register -local registerafmfeature = afm.features.register - -local allocate = utilities.storage.allocate -local getparameters = utilities.parsers.getparameters - -local implement = interfaces and interfaces.implement - -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") - --- -- -- -- -- -- --- 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 --- --- todo: get rid of byte() here - -classes.preset = { stretch = 2, shrink = 2, step = .5, factor = 1 } - -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 initialize(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, - } - 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 - -local specification = { - name = "expansion", - description = "apply hz optimization", - initializers = { - base = initialize, - node = initialize, - } -} - -registerotffeature(specification) -registerafmfeature(specification) - -fonts.goodies.register("expansions", function(...) return fonts.goodies.report("expansions", trace_expansion, ...) end) - -if context then - - implement { - name = "setupfontexpansion", - arguments = "2 strings", - actions = function(class,settings) getparameters(classes,class,'preset',settings) end - } - -end - --- -- -- -- -- -- --- 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 } - -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] = { 0.20, 0 }, -- ¿ - [0x0021] = { 0, 0.20 }, -- ! - [0x00A1] = { 0.20, 0, }, -- ¡ - [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 parameters = tfmdata.parameters - local resources = tfmdata.resources - local rawdata = tfmdata.shared.rawdata - local lookuphash = rawdata.lookuphash - local lookuptags = resources.lookuptags - local script = properties.script - local language = properties.language - local units = parameters.units - 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 - local lfactor = left * factor - local rfactor = right * factor - if trace_protrusion then - report_protrusions("left factor %0.3F, right factor %0.3F",lfactor,rfactor) - end - tfmdata.parameters.protrusion = { - factor = factor, - left = left, - right = right, - } - 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 steps = lookup.steps - if steps then - if trace_protrusion then - report_protrusions("setting left using lfbd") - end - for i=1,#steps do - local step = steps[i] - local coverage = step.coverage - if coverage then - for k, v in next, coverage do - if v == true then - -- zero - else - local w = descriptions[k].width - local d = - v[1] - if w == 0 or d == 0 then - -- ignored - else - local p = lfactor * d/units - characters[k].left_protruding = p - if trace_protrusion then - report_protrusions("lfbd -> %0.3F %C",p,k) - end - end - end - end - 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 steps = lookup.steps - if steps then - if trace_protrusion then - report_protrusions("setting right using rtbd") - end - for i=1,#steps do - local step = steps[i] - local coverage = step.coverage - if coverage then - for k, v in next, coverage do - if v == true then - -- zero - else - local w = descriptions[k].width - local d = - v[3] - if w == 0 or d == 0 then - -- ignored - else - local p = rfactor * d/units - characters[k].right_protruding = p - if trace_protrusion then - report_protrusions("rtbd -> %0.3F %C",p,k) - end - end - end - end - end - end - end - done = true - end - end - 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 initialize(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 - local lfactor = left * factor - local rfactor = right * factor - if trace_protrusion then - report_protrusions("left factor %0.3F, right factor %0.3F",lfactor,rfactor) - end - tfmdata.parameters.protrusion = { - factor = factor, - left = left, - right = right, - } - for i, chr in next, tfmdata.characters do - local v = vector[i] - local pl = nil - local pr = nil - if v then - pl = v[1] - pr = 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 = vector[s[1]] - local vr = 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 = v[1] - pr = v[2] - end - end - end - end - if pl and pl ~= 0 then - local p = pl * lfactor - chr.left_protruding = p - if trace_protrusion then - report_protrusions("left -> %0.3F %C ",p,i) - end - end - if pr and pr ~= 0 then - local p = pr * rfactor - chr.right_protruding = p - if trace_protrusion then - report_protrusions("right -> %0.3F %C",p,i) - end - 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 - -local specification = { - name = "protrusion", - description = "l/r margin character protrusion", - initializers = { - base = initialize, - node = initialize, - } -} - -registerotffeature(specification) -registerafmfeature(specification) - -fonts.goodies.register("protrusions", function(...) return fonts.goodies.report("protrusions", trace_protrusion, ...) end) - -if context then - - implement { - name = "setupfontprotrusion", - arguments = "2 strings", - actions = function(class,settings) getparameters(classes,class,'preset',settings) end - } - -end |