diff options
Diffstat (limited to 'Master/texmf-dist/tex/context/base/font-otc.lua')
-rw-r--r-- | Master/texmf-dist/tex/context/base/font-otc.lua | 238 |
1 files changed, 238 insertions, 0 deletions
diff --git a/Master/texmf-dist/tex/context/base/font-otc.lua b/Master/texmf-dist/tex/context/base/font-otc.lua new file mode 100644 index 00000000000..f75da39cdab --- /dev/null +++ b/Master/texmf-dist/tex/context/base/font-otc.lua @@ -0,0 +1,238 @@ +if not modules then modules = { } end modules ['font-otc'] = { + version = 1.001, + comment = "companion to font-otf.lua (context)", + author = "Hans Hagen, PRAGMA-ADE, Hasselt NL", + copyright = "PRAGMA ADE / ConTeXt Development Team", + license = "see context related readme files" +} + +local format, insert = string.format, table.insert +local type, next = type, next + +local ctxcatcodes = tex.ctxcatcodes + +-- we assume that the other otf stuff is loaded already + +local trace_loading = false trackers.register("otf.loading", function(v) trace_loading = v end) + +local otf = fonts.otf +local tfm = fonts.tfm + +-- instead of "script = "DFLT", langs = { 'dflt' }" we now use wildcards (we used to +-- have always); some day we can write a "force always when true" trick for other +-- features as well + +local extra_lists = { + tlig = { + { + endash = "hyphen hyphen", + emdash = "hyphen hyphen hyphen", + -- quotedblleft = "quoteleft quoteleft", + -- quotedblright = "quoteright quoteright", + -- quotedblleft = "grave grave", + -- quotedblright = "quotesingle quotesingle", + -- quotedblbase = "comma comma", + }, + }, + trep = { + { + -- [0x0022] = 0x201D, + [0x0027] = 0x2019, + -- [0x0060] = 0x2018, + }, + }, + anum = { + { -- arabic + [0x0030] = 0x0660, + [0x0031] = 0x0661, + [0x0032] = 0x0662, + [0x0033] = 0x0663, + [0x0034] = 0x0664, + [0x0035] = 0x0665, + [0x0036] = 0x0666, + [0x0037] = 0x0667, + [0x0038] = 0x0668, + [0x0039] = 0x0669, + }, + { -- persian + [0x0030] = 0x06F0, + [0x0031] = 0x06F1, + [0x0032] = 0x06F2, + [0x0033] = 0x06F3, + [0x0034] = 0x06F4, + [0x0035] = 0x06F5, + [0x0036] = 0x06F6, + [0x0037] = 0x06F7, + [0x0038] = 0x06F8, + [0x0039] = 0x06F9, + }, + }, +} + +local extra_features = { -- maybe just 1..n so that we prescribe order + tlig = { + { + features = { { scripts = { { script = "*", langs = { "*" }, } }, tag = "tlig", comment = "added bij mkiv" }, }, + name = "ctx_tlig_1", + subtables = { { name = "ctx_tlig_1_s" } }, + type = "gsub_ligature", + flags = { }, + }, + }, + trep = { + { + features = { { scripts = { { script = "*", langs = { "*" }, } }, tag = "trep", comment = "added bij mkiv" }, }, + name = "ctx_trep_1", + subtables = { { name = "ctx_trep_1_s" } }, + type = "gsub_single", + flags = { }, + }, + }, + anum = { + { + features = { { scripts = { { script = "arab", langs = { "dflt", "FAR" }, } }, tag = "anum", comment = "added bij mkiv" }, }, + name = "ctx_anum_1", + subtables = { { name = "ctx_anum_1_s" } }, + type = "gsub_single", + flags = { }, + }, + { + features = { { scripts = { { script = "arab", langs = { "URD" }, } }, tag = "anum", comment = "added bij mkiv" }, }, + name = "ctx_anum_2", + subtables = { { name = "ctx_anum_2_s" } }, + type = "gsub_single", + flags = { }, + }, + }, +} + +fonts.otf.enhancers["add some missing characters"] = function(data,filename) + -- todo +end + +fonts.otf.enhancers["enrich with features"] = function(data,filename) + -- could be done elsewhere (true can be #) + local used = { } + for i=1,#otf.glists do + local g = data[otf.glists[i]] + if g then + for i=1,#g do + local f = g[i].features + if f then + for i=1,#f do + local t = f[i].tag + if t then used[t] = true end + end + end + end + end + end + -- + local glyphs = data.glyphs + local indices = data.map.map + data.gsub = data.gsub or { } + for kind, specifications in next, extra_features do + if not used[kind] then + local done = 0 + for s=1,#specifications do + local added = false + local specification = specifications[s] + local list = extra_lists[kind][s] + local name = specification.name .. "_s" + if specification.type == "gsub_ligature" then + for unicode, index in next, indices do + local glyph = glyphs[index] + local ligature = list[glyph.name] + if ligature then + local o = glyph.lookups or { } + -- o[name] = { "ligature", ligature, glyph.name } + o[name] = { + { + ["type"] = "ligature", + ["specification"] = { + char = glyph.name, + components = ligature, + } + } + } + glyph.lookups, done, added = o, done+1, true + end + end + elseif specification.type == "gsub_single" then + for unicode, index in next, indices do + local glyph = glyphs[index] + local r = list[unicode] + if r then + local replacement = indices[r] + if replacement and glyphs[replacement] then + local o = glyph.lookups or { } + -- o[name] = { { "substitution", glyphs[replacement].name } } + o[name] = { + { + ["type"] = "substitution", + ["specification"] = { + variant = glyphs[replacement].name, + } + } + } + glyph.lookups, done, added = o, done+1, true + end + end + end + end + if added then + insert(data.gsub,s,table.fastcopy(specification)) -- right order + end + end + if done > 0 then + if trace_loading then + logs.report("load otf","enhance: registering %s feature (%s glyphs affected)",kind,done) + end + end + end + end +end + +otf.tables.features['tlig'] = 'TeX Ligatures' +otf.tables.features['trep'] = 'TeX Replacements' +otf.tables.features['anum'] = 'Arabic Digits' + +otf.features.register_base_substitution('tlig') +otf.features.register_base_substitution('trep') +otf.features.register_base_substitution('anum') + +-- the functionality is defined elsewhere + +fonts.initializers.base.otf.equaldigits = fonts.initializers.common.equaldigits +fonts.initializers.node.otf.equaldigits = fonts.initializers.common.equaldigits + +fonts.initializers.base.otf.lineheight = fonts.initializers.common.lineheight +fonts.initializers.node.otf.lineheight = fonts.initializers.common.lineheight + +fonts.initializers.base.otf.compose = fonts.initializers.common.compose +fonts.initializers.node.otf.compose = fonts.initializers.common.compose + +-- bonus function + +function otf.name_to_slot(name) -- todo: afm en tfm + local tfmdata = fonts.ids[font.current()] + if tfmdata and tfmdata.shared then + local otfdata = tfmdata.shared.otfdata + local unicode = otfdata.luatex.unicodes[name] + if type(unicode) == "number" then + return unicode + else + return unicode[1] + end + end + return nil +end + +function otf.char(n) -- todo: afm en tfm + if type(n) == "string" then + n = otf.name_to_slot(n) + end + if n then + tex.sprint(ctxcatcodes,format("\\char%s ",n)) + end +end |