-- -- -- Experimental ttx back end -- -- local format = string.format local table_insert = table.insert local table_concat = table.concat local print_int = mflua.MF.print_int local abs = math.abs local ttx = {} local xmlstream = {} local scrt = {} -- general table for local use local function DUMP(t) if type(t) == 'table' then print("table",#table) for k,v in pairs(t) do print(k,v) end end end local xml_comment = 'c' local xml_processing_instruction = 'p' local xml_element = 'e' local xml_header = 'h' -------------------------------------------------------------------------------- -- -- Errors and warning -------------------------------------------------------------------------------- local function warning(t,msg) print("Warning:"..msg..".") print("Element:") if type(t)=='table' then for k,v in pairs(t) do print(k,v) end print(#t.." values") else print(tostring(s)) end end -------------------------------------------------------------------------------- -- -- Element management -------------------------------------------------------------------------------- -- Todo: valid XML totext & toattr & tocomment local function totext(s) if not(type(s)=='string') then warning(s,"text:the data in not a string") end return tostring(s) end local function toattr(s) if not(type(s)=='string') then warning(s,"attr.:the data in not a string") end return tostring(s) end local function tocomment(s) if not(type(s)=='string') then warning(s,"comment:the data in not a string") end return tostring(s) end local function new_comment(text) local t ={} t[0]=xml_comment t[1]=false t[2]=tocomment(text) return t end local function new_element(name,attr) local t ={} t[0]=xml_element t[1]=tostring(name) if attr and type(attr)=='table' then for k,v in pairs(attr) do if type(k)~='number' then t[k]=v end end end return t end local function get_elementname(t) if t and type(t)=='table' then return t[1] else return nil end end local function insert_child(f,c) table_insert(f,c) end local function insert_child_at_beginning(f,c) -- f[1] is always the name table_insert(f,2,c) end local function insert_children(f,cc) for j=1,#cc do table_insert(f,cc[j]) end end -- -- get all the children (not descendants!) -- of source that match target name and attr. -- The existence of an attribute can be checked -- with @attrname=true (not @attrname="true") in -- target local function get_children(source,target) local res={} local t_attr={} -- only key/val from target for k,v in pairs(target) do if type(k)=='number' then t_attr[k]=v end end for i=2,#source do local e = source[i] if e[1]==target[1] then local found=true for k,v in pairs(t_attr) do if not(e[k] and ((e[k]==v) or (v==true))) then found=false break end end if found then res[#res+1]=e end end end return res end -------------------------------------------------------------------------------- -- -- Serialization --------------------------------------------------------------------------------- local function serialize_comment(t) if not(t[0]== xml_comment) then warning(t,'the node to serialize is not a comment') return end local name=t[1] -- false, discarded local elem={} elem[#elem+1]='<--' elem[#elem+1]=tocomment(t2) elem[#elem+1]='-->' elem[#elem+1]='\n' xmlstream[#xmlstream+1] = table_concat(elem) end local function serialize_processing_instruction(t) if not(t[0]== xml_processing_instruction) then warning(t,'the node to serialize is not a processing_instruction') return end local name=t[1] local elem={} elem[#elem+1]='' elem[#elem+1]="\n" xmlstream[#xmlstream+1] = table_concat(elem) end local function serialize_xml_header(t) local _t={} local elem={} elem[#elem+1]='' elem[#elem+1]='\n' xmlstream[#xmlstream+1] = table_concat(elem) end local function serialize_empty_elem(t) local name=t[1] local elem={} elem[#elem+1]='<' elem[#elem+1]=name local _t={} for k,v in pairs(t) do if not(type(k)=='number') then _t[#_t+1]=k end end table.sort(_t) for j=1,#_t do elem[#elem+1]=format([[ %s="%s"]],_t[j],toattr(t[_t[j]])) end elem[#elem+1]='/>' elem[#elem+1]="\n" xmlstream[#xmlstream+1] = table_concat(elem) end local function serialize_elem(t) if #t==1 then serialize_empty_elem(t) else local name=t[1] local elem={} elem[#elem+1]='<' elem[#elem+1]=name -- attributes local _t={} for k,v in pairs(t) do if not(type(k)=='number') then _t[#_t+1]=k end end table.sort(_t) for j=1,#_t do elem[#elem+1]=format([[ %s="%s"]],_t[j],toattr(t[_t[j]])) -- end elem[#elem+1]='>' elem[#elem+1]="\n" xmlstream[#xmlstream+1] = table_concat(elem) elem = {} for j=2,#t do if type(t[j])=='table' then serialize_elem(t[j]) elseif type(t[j])=='string' then xmlstream[#xmlstream+1] = totext(t[j]) end end elem[#elem+1]='' elem[#elem+1]="\n" xmlstream[#xmlstream+1] = table_concat(elem) end end -------------------------------------------------------------------------------- -- -- First children of XML ttx, plus utilities -------------------------------------------------------------------------------- local ttFont local GlyphOrder local GlyphID local head local hhea local maxp local OS_2,panose -- handy to have local name local cmap local post local CFF, CFFFont, Private -- handy to have local FFTM local GDEF local hmtx -- Important, child of CFFFont local CharStrings local function get_GlyphID(id,name) return new_element('GlyphID',{['id']=tostring(id),['name']=tostring(name)}) end local function put_head(name,value) table_insert(head, new_element(name, {['value']=tostring(value)})) end local function put_hhea(name,value) table_insert(hhea, new_element(name, {['value']=tostring(value)})) end local function put_maxp(name,value) table_insert(maxp,new_element(name, {['value']=tostring(value)})) end local function put_OS_2(name,value) table_insert(OS_2,new_element(name, {['value']=tostring(value)})) end -- handy local function put_panose(name,value) table_insert(panose,new_element(name, {['value']=tostring(value)})) end local function get_map(code,name) return new_element('map', {['code']=tostring(code),['name']=tostring(name)}) end local function put_post(name,value) table_insert(post,new_element(name, {['value']=tostring(value)})) end local function put_CFF(name,value) table_insert(CFF,new_element(name, {['value']=tostring(value)})) end local function put_CFFFont(name,value) table_insert(CFFFont,new_element(name, {['value']=tostring(value)})) end local function put_Private(name,value) table_insert(Private,new_element(name, {['value']=tostring(value)})) end local function put_FFTM(name,value) table_insert(FFTM,new_element(name, {['value']=tostring(value)})) end local function get_ClassDef(glyph,class) return new_element('ClassDef', {['glyph']=tostring(glyph),['class']=tostring(class)}) end local function get_mtx(name,width,lsb) return new_element('mtx', {['name']=tostring(name),['width']=tostring(width),['lsb']=tostring(lsb)}) end -- -- convenient method for a cmap0 -- -- local function get_cmap0_maps(maps) -- local t = {} -- if not(#maps==256) then -- warning(maps,"maps has not 256 values") -- end -- local s=(#maps>=256 and 256) or #maps -- for j=1,s do -- t[#t+1]=get_map(format("0x%x",j-1),maps[j]) -- end -- return t -- end local function get_raw_cmap0() local t = {} for j=0,255 do t[format("0x%02x",j)] = ".notdef" end return t end --for i=1,255 do table_insert(GlyphOrder,new_element('GlyphID', {['id']=i, ['name']="uni"..tostring(i)})) end --local ttFont = dofile('ttx_sample.lua') --savettfont(ttFont) -------------------------------------------------------------------------------- -- -- Create & save xml font -------------------------------------------------------------------------------- local function checkall(tfm) -- several checks here -- fix cmap0 -- local t = {} -- for k,_ in pairs(scrt.cmap.rawcmap0) do t[#t+1]=k end -- table.sort(t) -- for k=1,256 do -- insert_child(scrt.cmap.cmap0, get_map(t[k],scrt.cmap.rawcmap0[t[k]])) -- end end local function savettxfont(t) serialize_xml_header([[version="1.0" encoding="UTF-8"]]) serialize_elem(t) return table_concat(xmlstream) end local function makefont(tfm) -- checkall(tfm) serialize_xml_header([[version="1.0" encoding="UTF-8"]]) serialize_elem(ttFont) return table_concat(xmlstream) end -------------------------------------------------------------------------------- -- -- mflua layer -------------------------------------------------------------------------------- local function _eval_tonumber(q,offset) local qx,qy,xo,yo local w local _offset = offset if _offset == nil then _offset = '(0,0)' end w=string.gmatch(q,"[-0-9.]+"); qx,qy=w(),w() w=string.gmatch(_offset,"[-0-9.]+"); xo,yo=w(),w() return {tonumber(qx+xo),tonumber(qy+yo)} end local function setup(tfm,index,chartable) -- Default emsize is 1000 of CFF ttx.emsize = ttx.emsize or 1000 scrt.font_space = tfm.printfloat(ttx.emsize*(tfm.font.space),3) ttFont = new_element('ttFont', {['sfntVersion']="OTTO", ['ttLibVersion']="3.1"}) GlyphOrder = new_element('GlyphOrder') GlyphID = new_element('GlyphID', {['id']="0", ['name']=".notdef"}) head = new_element('head') hhea = new_element('hhea') maxp = new_element('maxp') OS_2 = new_element('OS_2') name = new_element('name') cmap = new_element('cmap') post = new_element('post') CFF = new_element('CFF') -- FFTM = new_element('FFTM') --FontForge TimeStamp table GDEF = new_element('GDEF') hmtx = new_element('hmtx') -- handy panose = new_element('panose') CFFFont = new_element('CFFFont',{['name']="SourceCode"}) Private = new_element('Private') CharStrings= new_element('CharStrings') table_insert(ttFont,GlyphOrder) table_insert(ttFont,head) table_insert(ttFont,hhea) table_insert(ttFont,maxp) table_insert(ttFont,OS_2) table_insert(ttFont,name) table_insert(ttFont,cmap) table_insert(ttFont,post) table_insert(ttFont,CFF) -- table_insert(ttFont,FFTM) table_insert(ttFont,GDEF) table_insert(ttFont,hmtx) table_insert(GlyphOrder,GlyphID) if ttx.userdata.head then for k,v in pairs(ttx.userdata.head) do put_head(k,v) end end if ttx.userdata.hhea then for k,v in pairs(ttx.userdata.hhea) do put_hhea(k,v) end end if ttx.userdata.maxp then for k,v in pairs(ttx.userdata.maxp) do put_maxp(k,v) end end if ttx.userdata.OS_2 then for k,v in pairs(ttx.userdata.OS_2) do put_OS_2(k,v) end end if ttx.userdata.panose then for k,v in pairs(ttx.userdata.panose) do put_panose(k,v) end end insert_child(OS_2,panose) if ttx.userdata.namerecord then local _e local t for i=1,#ttx.userdata.namerecord do t = ttx.userdata.namerecord[i] _e = new_element('namerecord',{['nameID']=t.nameID,['platformID']=t.platformID, ['platEncID']=t.platEncID, ['langID']=t.langID, ['unicode']=t.unicode}) insert_child(_e,t.value); insert_child(name,_e) end end local cmap0,cmap4_0,cmap4_3 cmap4_0 = new_element('cmap_format_4', {['platformID']="0",['platEncID']="3",['language']="0",}) --cmap0 = new_element('cmap_format_0', {['platformID']="1",['platEncID']="0",['language']="0",}) cmap4_3 = new_element('cmap_format_4', {['platformID']="3",['platEncID']="1",['language']="0",}) insert_child(cmap4_0,get_map("0x0",".notdef")) insert_child(cmap4_3,get_map("0x0",".notdef")) scrt.cmap = scrt.cmap or {} scrt.cmap.cmap4_0 = cmap4_0 scrt.cmap.cmap4_3 = cmap4_3 --scrt.cmap.cmap0 = cmap0 --scrt.cmap.rawcmap0 = get_raw_cmap0() insert_child(cmap,{'tableVersion', ['version']="0"}) insert_child(cmap,cmap4_0) --insert_child(cmap,cmap0) insert_child(cmap,cmap4_3) if ttx.userdata.post then for k,v in pairs(ttx.userdata.post) do put_post(k,v) end end put_CFF('major',"1") put_CFF('minor',"0") insert_child(CFF,CFFFont) if ttx.userdata.CFFFont then for k,v in pairs(mflua.ttx.userdata.CFFFont) do put_CFFFont(k,v) end end insert_child(CFFFont,{'Encoding', ['name']=mflua.ttx.userdata.CFFFont.Encoding}) insert_child(CFFFont,Private) if ttx.userdata.CFFFont.Private then for k,v in pairs(ttx.userdata.CFFFont.Private) do put_Private(k,v) end end local subrs = new_element('Subrs') scrt.subrs = subrs if ttx.userdata.CFFFont.Private.Subrs then for k,v in pairs(ttx.userdata.CFFFont.Private.Subrs) do insert_child(subrs,{'CharString', ['index']=k, v}) end end insert_child(Private,subrs) -- .notdef char local notdef = new_element('CharString', {['name']=".notdef"}) insert_child(notdef,"107 endchar\n") insert_child_at_beginning(CharStrings, notdef) insert_child(CFFFont,CharStrings) -- -- TODO: check GlobalSubrs!! -- local globsubrs = new_element('GlobalSubrs') insert_child(CFF,globsubrs) if ttx.userdata.CFF.GlobalSubrs then for k,v in pairs(ttx.userdata.CFF.GlobalSubrs) do insert_child(globsubrs,{'CharString', ['index']=k, v}) end end -- -- fontforge timestamp table. -- -- put_FFTM('version', "1") -- put_FFTM('FFTimeStamp', "Fri Oct 7 21:32:10 2016") -- put_FFTM('sourceCreated', "Tue Apr 4 13:38:00 2017") -- put_FFTM('sourceModified', "Wed Apr 5 16:26:11 2017") local glyphclassdef = new_element('GlyphClassDef',{['Format']="2"}) insert_child(GDEF,{'Version',['value']="0x00010000"}) insert_child(GDEF,glyphclassdef) scrt.gdef = scrt.gdef or {} scrt.gdef.glyphclassdef = glyphclassdef local LigCaretList = new_element('LigCaretList') insert_child(LigCaretList,new_element('Coverage',{['Format']="2"})) insert_child(GDEF,LigCaretList) insert_child(hmtx, get_mtx('.notdef',scrt.font_space,"0")) end local function reverse(cycle) local t={} local curve local p,c1,c2,q for i=#cycle,1,-1 do curve=cycle[i] p,c1,c2,q=curve[1],curve[2],curve[3],curve[4] curve[1],curve[2],curve[3],curve[4]=q,c2,c1,p t[#t+1]=curve end return t end local function _reverse(cycle) local cv1, cv2 local p,c1,c2,q local l=#cycle for i=1,l/2 do cv1=cycle[i] cv2=cycle[l+1-i] p,c1,c2,q = cv1[1],cv1[2],cv1[3],cv1[4] cv1[1],cv1[2],cv1[3],cv1[4] = q,c2,c1,p p,c1,c2,q = cv2[1],cv2[2],cv2[3],cv2[4] cv2[1],cv2[2],cv2[3],cv2[4] = q,c2,c1,p cycle[l+1-i]=cv1 cycle[i]=cv2 end end local function make_glyph(valid_curves,char,cycles,tfm) -- Write the ttx -- -- print('BEZ MFbuiltin.hppp='..print_scaled(MFbuiltin.hppp())) -- print('BEZ MFbuiltin.vppp='..print_scaled(MFbuiltin.vppp())) -- print('BEZ MFbuiltin.designsize='..print_scaled(MFbuiltin.designsize())) local tfm = tfm local mflua_index = tonumber( char['index'] ) -- better a string or a number local index = mflua_index if mflua.ttx.userdata.charindex and mflua.ttx.userdata.charindex[index] then index = mflua.ttx.userdata.charindex[index] end local design_size=tonumber ( print_scaled(MFbuiltin.designsize()) ) --pt local char_wd=tonumber( char['char_wd'] ) -- pt local char_ht=tonumber( char['char_ht'] ) -- pt local char_dp=tonumber( char['char_dp'] ) -- pt local cmap4_0 = scrt.cmap.cmap4_0 local cmap4_3 = scrt.cmap.cmap4_3 --local rawcmap0 = scrt.cmap.rawcmap0 local glyphclassdef = scrt.gdef.glyphclassdef --local xheight = 0.458333 * design_size -- must be read from tfm !! local x_resolution = math.floor(0.5+tonumber( print_scaled(MFbuiltin.hppp()) )* 72.27) local y_resolution = math.floor(0.5+tonumber( print_scaled(MFbuiltin.vppp()) )* 72.27) assert(x_resolution==y_resolution, format('Error on _make_glyph x_res=%d and y_res=%d differ',x_resolution,y_resolution)) local resolution = x_resolution local emsize = ttx.emsize -- 1000, type 1, also known as em_unit: 1000 emsize = 1em local em_unit = emsize local em_unit_for_pixel = (72.27/design_size) * (emsize / resolution) local bp_for_pt = 72/72.27 local char_wd_emunit = (char_wd/design_size) *em_unit local char_ht_emunit = (char_ht/design_size) *em_unit local char_dp_emunit = (char_dp/design_size) *em_unit local glyph_name = tostring(char['charname']) if glyph_name and glyph_name ~= '' and not(index==0) then table_insert(GlyphOrder,get_GlyphID(index,glyph_name)) end local content = {} if (abs(char_wd_emunit-scrt.font_space)>1e-4) then table_insert(content,format("%0.3f w",char_wd_emunit-scrt.font_space,print_int(1000*(tfm.font.space)))) end --table_insert(content,"stem ?") -- TODO --table_insert(content,"mask ?") -- TODO local origin = {0,0} for i,cycle in pairs(cycles) do local p,c1,c2,q,offset cycle = reverse(cycle) for i1,curve in ipairs(cycle) do p,c1,c2,q,offset=curve[1],curve[2],curve[3],curve[4],curve[5] p =_eval_tonumber(p ,offset) c1=_eval_tonumber(c1,offset) c2=_eval_tonumber(c2,offset) q =_eval_tonumber(q ,offset) -- em_unit_for_pixel p[1],p[2] = p[1] *em_unit_for_pixel, p[2]*em_unit_for_pixel q[1],q[2] = q[1] *em_unit_for_pixel, q[2]*em_unit_for_pixel c1[1],c1[2] = c1[1]*em_unit_for_pixel, c1[2]*em_unit_for_pixel c2[1],c2[2] = c2[1]*em_unit_for_pixel, c2[2]*em_unit_for_pixel if i1==1 then table_insert(content,format("%0.2f %0.2f rmoveto",p[1]-origin[1],p[2]-origin[2])) origin = {p[1],p[2]} end --table_insert(content,format("%0.2f %0.2f %0.2f %0.2f %0.2f %0.2f rrcurveto", table_insert(content,format("%0.0f %0.0f %0.0f %0.0f %0.0f %0.0f rrcurveto", c1[1] -p[1], c1[2]-p[2], c2[1]-c1[1], c2[2]-c1[2], q[1] -c2[1], q[2]-c2[2],p[1],p[2],c1[1],c1[2],c2[1],c2[2],q[1],q[2])) end end table_insert(content,"endchar\n") local CharString = new_element('CharString', {['name']=glyph_name}) insert_child(CharString,table_concat(content,"\n")) insert_child(CharStrings,CharString) insert_child(cmap4_0,get_map(format("0x%x",index),glyph_name)) --rawcmap0[format("0x%x",1+index%256)] = glyph_name insert_child(cmap4_3,get_map(format("0x%x",index),glyph_name)) insert_child(glyphclassdef, get_ClassDef(glyph_name,"1")) insert_child(hmtx, get_mtx(glyph_name,char_wd_emunit,"80")) end -- make_glyph ttx.make_glyph = make_glyph ttx.makefont = makefont ttx.setup = setup ttx.userdata = {} return ttx