diff options
Diffstat (limited to 'otfl-font-otn.lua')
| -rw-r--r-- | otfl-font-otn.lua | 127 |
1 files changed, 99 insertions, 28 deletions
diff --git a/otfl-font-otn.lua b/otfl-font-otn.lua index 77d67d4..fb04b36 100644 --- a/otfl-font-otn.lua +++ b/otfl-font-otn.lua @@ -117,7 +117,7 @@ results in different tables.</p> -- remark: the 'not implemented yet' variants will be done when we have fonts that use them -- remark: we need to check what to do with discretionaries -local concat = table.concat +local concat, insert, remove = table.concat, table.insert, table.remove local format, gmatch, gsub, find, match, lower, strip = string.format, string.gmatch, string.gsub, string.find, string.match, string.lower, string.strip local type, next, tonumber, tostring = type, next, tonumber, tostring @@ -139,6 +139,7 @@ local trace_details = false trackers.register("otf.details", function local trace_applied = false trackers.register("otf.applied", function(v) trace_applied = v end) local trace_steps = false trackers.register("otf.steps", function(v) trace_steps = v end) local trace_skips = false trackers.register("otf.skips", function(v) trace_skips = v end) +local trace_directions = false trackers.register("otf.directions", function(v) trace_directions = v end) trackers.register("otf.verbose_chain", function(v) otf.setcontextchain(v and "verbose") end) trackers.register("otf.normal_chain", function(v) otf.setcontextchain(v and "normal") end) @@ -743,7 +744,7 @@ function handlers.gpos_cursive(start,kind,lookupname,exitanchors,sequence) -- to if exit then local dx, dy, bound = set_cursive(start,nxt,tfmdata.factor,rlmode,exit,entry,characters[startchar],characters[nextchar]) if trace_cursive then - logprocess("%s: moving %s to %s cursive (%s,%s) using anchor %s and bound %s",pref(kind,lookupname),gref(startchar),gref(nextchar),dx,dy,anchor,bound) + logprocess("%s: moving %s to %s cursive (%s,%s) using anchor %s and bound %s in rlmode %s",pref(kind,lookupname),gref(startchar),gref(nextchar),dx,dy,anchor,bound,rlmode) end done = true break @@ -1395,7 +1396,7 @@ function chainprocs.gpos_cursive(start,stop,kind,chainname,currentcontext,cache, if exit then local dx, dy, bound = set_cursive(start,nxt,tfmdata.factor,rlmode,exit,entry,characters[startchar],characters[nextchar]) if trace_cursive then - logprocess("%s: moving %s to %s cursive (%s,%s) using anchor %s and bound %s",pref(kind,lookupname),gref(startchar),gref(nextchar),dx,dy,anchor,bound) + logprocess("%s: moving %s to %s cursive (%s,%s) using anchor %s and bound %s in rlmode %s",pref(kind,lookupname),gref(startchar),gref(nextchar),dx,dy,anchor,bound,rlmode) end done = true break @@ -1832,6 +1833,9 @@ local resolved = { } -- we only resolve a font,script,language pair once -- todo: pass all these 'locals' in a table +-- maybe some day i'll make an alternative that works on 'sub direction runs' which might be +-- more efficient for arabic but it has quite some consequences + function fonts.methods.node.otf.features(head,font,attr) if trace_steps then checkstep(head) @@ -1875,6 +1879,7 @@ function fonts.methods.node.otf.features(head,font,attr) local ra = rl [attr] if ra == nil then ra = { } rl [attr] = ra end -- attr can be false -- sequences always > 1 so no need for optimization for s=1,#sequences do + local pardir, txtdir = 0, { } local success = false local sequence = sequences[s] local r = ra[s] -- cache @@ -1974,7 +1979,7 @@ function fonts.methods.node.otf.features(head,font,attr) local ns = #subtables local thecache = featuredata[typ] or { } start = head -- local ? - rlmode = 0 + rlmode = 0 -- to be checked ? if ns == 1 then local lookupname = subtables[1] local lookupcache = thecache[lookupname] @@ -2016,24 +2021,57 @@ function fonts.methods.node.otf.features(head,font,attr) -- start = start.next -- end elseif id == whatsit then +--~ if subtype == 7 then +--~ local dir = start.dir +--~ if dir == "+TRT" then +--~ rlmode = -1 +--~ elseif dir == "+TLT" then +--~ rlmode = 1 +--~ else +--~ rlmode = 0 +--~ end +--~ elseif subtype == 6 then +--~ local dir = start.dir +--~ if dir == "TRT" then +--~ rlmode = -1 +--~ elseif dir == "TLT" then +--~ rlmode = 1 +--~ else +--~ rlmode = 0 +--~ end +--~ end local subtype = start.subtype if subtype == 7 then local dir = start.dir - if dir == "+TRT" then + if dir == "+TRT" or dir == "+TLT" then + insert(txtdir,dir) + elseif dir == "-TRT" or dir == "-TLT" then + remove(txtdir) + end + local d = txtdir[#txtdir] + if d == "+TRT" then rlmode = -1 - elseif dir == "+TLT" then + elseif d == "+TLT" then rlmode = 1 else - rlmode = 0 + rlmode = pardir + end + if trace_directions then + logs.report("fonts","directions after textdir %s: pardir=%s, txtdir=%s:%s, rlmode=%s",dir,pardir,#txtdir,txtdir[#txtdir] or "unset",rlmode) end elseif subtype == 6 then local dir = start.dir if dir == "TRT" then - rlmode = -1 + pardir = -1 elseif dir == "TLT" then - rlmode = 1 + pardir = 1 else - rlmode = 0 + pardir = 0 + end + rlmode = pardir + --~ txtdir = { } + if trace_directions then + logs.report("fonts","directions after pardir %s: pardir=%s, txtdir=%s:%s, rlmode=%s",dir,pardir,#txtdir,txtdir[#txtdir] or "unset",rlmode) end end start = start.next @@ -2041,7 +2079,6 @@ function fonts.methods.node.otf.features(head,font,attr) start = start.next end end - end else while start do @@ -2088,25 +2125,59 @@ function fonts.methods.node.otf.features(head,font,attr) -- end elseif id == whatsit then local subtype = start.subtype - if subtype == 7 then - local dir = start.dir - if dir == "+TRT" then - rlmode = -1 - elseif dir == "+TLT" then - rlmode = 1 - else - rlmode = 0 +--~ if subtype == 7 then +--~ local dir = start.dir +--~ if dir == "+TRT" then +--~ rlmode = -1 +--~ elseif dir == "+TLT" then +--~ rlmode = 1 +--~ else +--~ rlmode = 0 +--~ end +--~ elseif subtype == 6 then +--~ local dir = start.dir +--~ if dir == "TRT" then +--~ rlmode = -1 +--~ elseif dir == "TLT" then +--~ rlmode = 1 +--~ else +--~ rlmode = 0 +--~ end +--~ end + local subtype = start.subtype + if subtype == 7 then + local dir = start.dir + if dir == "+TRT" or dir == "+TLT" then + insert(txtdir,dir) + elseif dir == "-TRT" or dir == "-TLT" then + remove(txtdir) + end + local d = txtdir[#txtdir] + if d == "+TRT" then + rlmode = -1 + elseif d == "+TLT" then + rlmode = 1 + else + rlmode = pardir + end + if trace_directions then + logs.report("fonts","directions after textdir %s: pardir=%s, txtdir=%s:%s, rlmode=%s",dir,pardir,#txtdir,txtdir[#txtdir] or "unset",rlmode) + end + elseif subtype == 6 then + local dir = start.dir + if dir == "TRT" then + pardir = -1 + elseif dir == "TLT" then + pardir = 1 + else + pardir = 0 + end + rlmode = pardir + --~ txtdir = { } + if trace_directions then + logs.report("fonts","directions after pardir %s: pardir=%s, txtdir=%s:%s, rlmode=%s",dir,pardir,#txtdir,txtdir[#txtdir] or "unset",rlmode) end - elseif subtype == 6 then - local dir = start.dir - if dir == "TRT" then - rlmode = -1 - elseif dir == "TLT" then - rlmode = 1 - else - rlmode = 0 end - end start = start.next else start = start.next |