diff options
Diffstat (limited to 'src/fontloader/misc/fontloader-font-otr.lua')
| -rw-r--r-- | src/fontloader/misc/fontloader-font-otr.lua | 80 |
1 files changed, 64 insertions, 16 deletions
diff --git a/src/fontloader/misc/fontloader-font-otr.lua b/src/fontloader/misc/fontloader-font-otr.lua index 3542d18..24f6854 100644 --- a/src/fontloader/misc/fontloader-font-otr.lua +++ b/src/fontloader/misc/fontloader-font-otr.lua @@ -60,16 +60,16 @@ if not modules then modules = { } end modules ['font-otr'] = { -- faster but it might not be the real bottleneck as we still need to juggle data. It -- is probably more memory efficient as no intermediate strings are involved. -if not characters then - require("char-def") - require("char-ini") -end +-- if not characters then +-- require("char-def") +-- require("char-ini") +-- end local next, type, unpack = next, type, unpack local byte, lower, char, strip, gsub = string.byte, string.lower, string.char, string.strip, string.gsub local bittest = bit32.btest -local concat, remove, unpack = table.concat, table.remov, table.unpack -local floor, mod, abs, sqrt, round = math.floor, math.mod, math.abs, math.sqrt, math.round +local concat, remove, unpack, fastcopy = table.concat, table.remov, table.unpack, table.fastcopy +local floor, abs, sqrt, round = math.floor, math.abs, math.sqrt, math.round local P, R, S, C, Cs, Cc, Ct, Carg, Cmt = lpeg.P, lpeg.R, lpeg.S, lpeg.C, lpeg.Cs, lpeg.Cc, lpeg.Ct, lpeg.Carg, lpeg.Cmt local lpegmatch = lpeg.match @@ -1066,14 +1066,13 @@ readers.hmtx = function(f,fontdata,specification) local nofmetrics = fontdata.horizontalheader.nofhmetrics local glyphs = fontdata.glyphs local nofglyphs = fontdata.nofglyphs - local nofrepeated = nofglyphs - nofmetrics local width = 0 -- advance local leftsidebearing = 0 for i=0,nofmetrics-1 do local glyph = glyphs[i] width = readshort(f) leftsidebearing = readshort(f) - if advance ~= 0 then + if width ~= 0 then glyph.width = width end -- if leftsidebearing ~= 0 then @@ -1082,8 +1081,8 @@ readers.hmtx = function(f,fontdata,specification) end -- The next can happen in for instance a monospace font or in a cjk font -- with fixed widths. - for i=nofmetrics,nofrepeated do - local glyph = glyphs[i] + for i=nofmetrics,nofglyphs-1 do + local glyph = glyphs[i] if width ~= 0 then glyph.width = width end @@ -1187,6 +1186,8 @@ local sequence = { { 3, 0, 6 }, -- variants { 0, 5, 14 }, + -- last resort ranges + { 3, 10, 13 }, } -- local sequence = { @@ -1269,10 +1270,10 @@ formatreaders[4] = function(f,fontdata,offset) -- bad encoding elseif offset == 0 then if trace_cmap then - report("format 4.%i segment %2i from %C upto %C at index %H",1,segment,startchar,endchar,mod(startchar + delta,65536)) + report("format 4.%i segment %2i from %C upto %C at index %H",1,segment,startchar,endchar,(startchar + delta) % 65536) end for unicode=startchar,endchar do - local index = mod(unicode + delta,65536) + local index = (unicode + delta) % 65536 if index and index > 0 then local glyph = glyphs[index] if glyph then @@ -1302,13 +1303,13 @@ formatreaders[4] = function(f,fontdata,offset) else local shift = (segment-nofsegments+offset/2) - startchar if trace_cmap then - report("format 4.%i segment %2i from %C upto %C at index %H",0,segment,startchar,endchar,mod(startchar + delta,65536)) + report("format 4.%i segment %2i from %C upto %C at index %H",0,segment,startchar,endchar,(startchar + delta) % 65536) end for unicode=startchar,endchar do local slot = shift + unicode local index = indices[slot] if index and index > 0 then - index = mod(index + delta,65536) + index = (index + delta) % 65536 local glyph = glyphs[index] if glyph then local gu = glyph.unicode @@ -1389,7 +1390,7 @@ formatreaders[12] = function(f,fontdata,offset) local last = readulong(f) local index = readulong(f) if trace_cmap then - report("format 12 from %C to %C",first,last) + report("format 12 from %C to %C starts at index %i",first,last,index) end for unicode=first,last do local glyph = glyphs[index] @@ -1417,6 +1418,53 @@ formatreaders[12] = function(f,fontdata,offset) return nofdone end +formatreaders[13] = function(f,fontdata,offset) + -- + -- this fector is only used for simple fallback fonts + -- + setposition(f,offset+2+2+4+4) -- skip format reserved length language + local mapping = fontdata.mapping + local glyphs = fontdata.glyphs + local duplicates = fontdata.duplicates + local nofgroups = readulong(f) + local nofdone = 0 + for i=1,nofgroups do + local first = readulong(f) + local last = readulong(f) + local index = readulong(f) + if first < privateoffset then + if trace_cmap then + report("format 13 from %C to %C get index %i",first,last,index) + end + local glyph = glyphs[index] + local unicode = glyph.unicode + if not unicode then + unicode = first + glyph.unicode = unicode + first = first + 1 + end + local list = duplicates[unicode] + mapping[index] = unicode + if not list then + list = { } + duplicates[unicode] = list + end + if last >= privateoffset then + local limit = privateoffset - 1 + report("format 13 from %C to %C pruned to %C",first,last,limit) + last = limit + end + for unicode=first,last do + list[unicode] = true + end + nofdone = nofdone + last - first + 1 + else + report("format 13 from %C to %C ignored",first,last) + end + end + return nofdone +end + formatreaders[14] = function(f,fontdata,offset) if offset and offset ~= 0 then setposition(f,offset) @@ -2226,7 +2274,7 @@ function readers.extend(fontdata) end end --- +-- for now .. this will move to a context specific file if fonts.hashes then |