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|
if not modules then modules = { } end modules ['font-cff'] = {
version = 1.001,
comment = "companion to font-ini.mkiv",
author = "Hans Hagen, PRAGMA-ADE, Hasselt NL",
copyright = "PRAGMA ADE / ConTeXt Development Team",
license = "see context related readme files"
}
-- todo: option.outlines
-- todo: option.boundingbox
-- per charstring (less memory)
-- This is a heavy one as it is a rather packed format. We don't need al the information
-- now but we might need it later (who know what magic we can do with metapost). So at
-- some point this might become a module. We just follow Adobe Technical Notes #5176 and
-- #5177. In case of doubt I looked in the fontforge code that comes with LuaTeX.
-- For now we save the segments in a list of segments with the operator last in an entry
-- because that reflects the original. But it might make more sense to use a single array
-- per segment. For pdf a simple concat works ok, but for other purposes a operator first
-- flush is nicer.
local next, type, tonumber = next, type, tonumber
local byte = string.byte
local concat, remove = table.concat, table.remove
local floor, abs, round, ceil = math.floor, math.abs, math.round, math.ceil
local P, C, R, S, C, Cs, Ct = lpeg.P, lpeg.C, lpeg.R, lpeg.S, lpeg.C, lpeg.Cs, lpeg.Ct
local lpegmatch = lpeg.match
local readers = fonts.handlers.otf.readers
local streamreader = readers.streamreader
local readbytes = streamreader.readbytes
local readstring = streamreader.readstring
local readbyte = streamreader.readcardinal1 -- 8-bit unsigned integer
local readushort = streamreader.readcardinal2 -- 16-bit unsigned integer
local readuint = streamreader.readcardinal3 -- 24-bit unsigned integer
local readulong = streamreader.readcardinal4 -- 24-bit unsigned integer
local setposition = streamreader.setposition
local getposition = streamreader.getposition
local setmetatableindex = table.setmetatableindex
local trace_charstrings = false trackers.register("fonts.cff.charstrings",function(v) trace_charstrings = v end)
local report = logs.reporter("otf reader","cff")
local parsedictionaries
local parsecharstring
local parsecharstrings
local resetcharstrings
local parseprivates
local defaultstrings = { [0] = -- taken from ff
".notdef", "space", "exclam", "quotedbl", "numbersign", "dollar", "percent",
"ampersand", "quoteright", "parenleft", "parenright", "asterisk", "plus",
"comma", "hyphen", "period", "slash", "zero", "one", "two", "three", "four",
"five", "six", "seven", "eight", "nine", "colon", "semicolon", "less",
"equal", "greater", "question", "at", "A", "B", "C", "D", "E", "F", "G", "H",
"I", "J", "K", "L", "M", "N", "O", "P", "Q", "R", "S", "T", "U", "V", "W",
"X", "Y", "Z", "bracketleft", "backslash", "bracketright", "asciicircum",
"underscore", "quoteleft", "a", "b", "c", "d", "e", "f", "g", "h", "i", "j",
"k", "l", "m", "n", "o", "p", "q", "r", "s", "t", "u", "v", "w", "x", "y",
"z", "braceleft", "bar", "braceright", "asciitilde", "exclamdown", "cent",
"sterling", "fraction", "yen", "florin", "section", "currency",
"quotesingle", "quotedblleft", "guillemotleft", "guilsinglleft",
"guilsinglright", "fi", "fl", "endash", "dagger", "daggerdbl",
"periodcentered", "paragraph", "bullet", "quotesinglbase", "quotedblbase",
"quotedblright", "guillemotright", "ellipsis", "perthousand", "questiondown",
"grave", "acute", "circumflex", "tilde", "macron", "breve", "dotaccent",
"dieresis", "ring", "cedilla", "hungarumlaut", "ogonek", "caron", "emdash",
"AE", "ordfeminine", "Lslash", "Oslash", "OE", "ordmasculine", "ae",
"dotlessi", "lslash", "oslash", "oe", "germandbls", "onesuperior",
"logicalnot", "mu", "trademark", "Eth", "onehalf", "plusminus", "Thorn",
"onequarter", "divide", "brokenbar", "degree", "thorn", "threequarters",
"twosuperior", "registered", "minus", "eth", "multiply", "threesuperior",
"copyright", "Aacute", "Acircumflex", "Adieresis", "Agrave", "Aring",
"Atilde", "Ccedilla", "Eacute", "Ecircumflex", "Edieresis", "Egrave",
"Iacute", "Icircumflex", "Idieresis", "Igrave", "Ntilde", "Oacute",
"Ocircumflex", "Odieresis", "Ograve", "Otilde", "Scaron", "Uacute",
"Ucircumflex", "Udieresis", "Ugrave", "Yacute", "Ydieresis", "Zcaron",
"aacute", "acircumflex", "adieresis", "agrave", "aring", "atilde",
"ccedilla", "eacute", "ecircumflex", "edieresis", "egrave", "iacute",
"icircumflex", "idieresis", "igrave", "ntilde", "oacute", "ocircumflex",
"odieresis", "ograve", "otilde", "scaron", "uacute", "ucircumflex",
"udieresis", "ugrave", "yacute", "ydieresis", "zcaron", "exclamsmall",
"Hungarumlautsmall", "dollaroldstyle", "dollarsuperior", "ampersandsmall",
"Acutesmall", "parenleftsuperior", "parenrightsuperior", "twodotenleader",
"onedotenleader", "zerooldstyle", "oneoldstyle", "twooldstyle",
"threeoldstyle", "fouroldstyle", "fiveoldstyle", "sixoldstyle",
"sevenoldstyle", "eightoldstyle", "nineoldstyle", "commasuperior",
"threequartersemdash", "periodsuperior", "questionsmall", "asuperior",
"bsuperior", "centsuperior", "dsuperior", "esuperior", "isuperior",
"lsuperior", "msuperior", "nsuperior", "osuperior", "rsuperior", "ssuperior",
"tsuperior", "ff", "ffi", "ffl", "parenleftinferior", "parenrightinferior",
"Circumflexsmall", "hyphensuperior", "Gravesmall", "Asmall", "Bsmall",
"Csmall", "Dsmall", "Esmall", "Fsmall", "Gsmall", "Hsmall", "Ismall",
"Jsmall", "Ksmall", "Lsmall", "Msmall", "Nsmall", "Osmall", "Psmall",
"Qsmall", "Rsmall", "Ssmall", "Tsmall", "Usmall", "Vsmall", "Wsmall",
"Xsmall", "Ysmall", "Zsmall", "colonmonetary", "onefitted", "rupiah",
"Tildesmall", "exclamdownsmall", "centoldstyle", "Lslashsmall",
"Scaronsmall", "Zcaronsmall", "Dieresissmall", "Brevesmall", "Caronsmall",
"Dotaccentsmall", "Macronsmall", "figuredash", "hypheninferior",
"Ogoneksmall", "Ringsmall", "Cedillasmall", "questiondownsmall", "oneeighth",
"threeeighths", "fiveeighths", "seveneighths", "onethird", "twothirds",
"zerosuperior", "foursuperior", "fivesuperior", "sixsuperior",
"sevensuperior", "eightsuperior", "ninesuperior", "zeroinferior",
"oneinferior", "twoinferior", "threeinferior", "fourinferior",
"fiveinferior", "sixinferior", "seveninferior", "eightinferior",
"nineinferior", "centinferior", "dollarinferior", "periodinferior",
"commainferior", "Agravesmall", "Aacutesmall", "Acircumflexsmall",
"Atildesmall", "Adieresissmall", "Aringsmall", "AEsmall", "Ccedillasmall",
"Egravesmall", "Eacutesmall", "Ecircumflexsmall", "Edieresissmall",
"Igravesmall", "Iacutesmall", "Icircumflexsmall", "Idieresissmall",
"Ethsmall", "Ntildesmall", "Ogravesmall", "Oacutesmall", "Ocircumflexsmall",
"Otildesmall", "Odieresissmall", "OEsmall", "Oslashsmall", "Ugravesmall",
"Uacutesmall", "Ucircumflexsmall", "Udieresissmall", "Yacutesmall",
"Thornsmall", "Ydieresissmall", "001.000", "001.001", "001.002", "001.003",
"Black", "Bold", "Book", "Light", "Medium", "Regular", "Roman", "Semibold",
}
local cffreaders = {
readbyte,
readushort,
readuint,
readulong,
}
-- The header contains information about its own size.
local function readheader(f)
local offset = getposition(f)
local header = {
offset = offset,
major = readbyte(f),
minor = readbyte(f),
size = readbyte(f), -- headersize
osize = readbyte(f), -- for offsets to start
}
setposition(f,offset+header.size)
return header
end
-- The indexes all look the same, so we share a loader. We could pass a handler
-- and run over the array but why bother, we only have a few uses.
local function readlengths(f)
local count = readushort(f)
if count == 0 then
return { }
end
local osize = readbyte(f)
local read = cffreaders[osize]
if not read then
report("bad offset size: %i",osize)
return { }
end
local lengths = { }
local previous = read(f)
for i=1,count do
local offset = read(f)
lengths[i] = offset - previous
previous = offset
end
return lengths
end
-- There can be subfonts so names is an array. However, in our case it's always
-- one font. The same is true for the top dictionaries. Watch how we only load
-- the dictionary string as for interpretation we need to have the strings loaded
-- as well.
local function readfontnames(f)
local names = readlengths(f)
for i=1,#names do
names[i] = readstring(f,names[i])
end
return names
end
local function readtopdictionaries(f)
local dictionaries = readlengths(f)
for i=1,#dictionaries do
dictionaries[i] = readstring(f,dictionaries[i])
end
return dictionaries
end
-- Strings are added to a list of standard strings so we start the font specific
-- one with an offset. Strings are shared so we have one table.
local function readstrings(f)
local lengths = readlengths(f)
local strings = setmetatableindex({ }, defaultstrings)
local index = #defaultstrings
for i=1,#lengths do
index = index + 1
strings[index] = readstring(f,lengths[i])
end
return strings
end
-- Parsing the dictionaries is delayed till we have the strings loaded. The parser
-- is stack based so the operands come before the operator (like in postscript).
-- local function delta(t)
-- local n = #t
-- if n > 1 then
-- local p = t[1]
-- for i=2,n do
-- local c = t[i]
-- t[i] = c + p
-- p = c
-- end
-- end
-- end
do
-- We use a closure so that we don't need to pass too much around.
local stack = { }
local top = 0
local result = { }
local strings = { }
local p_single =
P("\00") / function()
result.version = strings[stack[top]] or "unset"
top = 0
end
+ P("\01") / function()
result.notice = strings[stack[top]] or "unset"
top = 0
end
+ P("\02") / function()
result.fullname = strings[stack[top]] or "unset"
top = 0
end
+ P("\03") / function()
result.familyname = strings[stack[top]] or "unset"
top = 0
end
+ P("\04") / function()
result.weight = strings[stack[top]] or "unset"
top = 0
end
+ P("\05") / function()
result.fontbbox = { unpack(stack,1,4) }
top = 0
end
-- + P("\06") / function() end -- bluevalues
-- + P("\07") / function() end -- otherblues
-- + P("\08") / function() end -- familyblues
-- + P("\09") / function() end -- familyotherblues
-- + P("\10") / function() end -- strhw
-- + P("\11") / function() end -- stdvw
+ P("\13") / function()
result.uniqueid = stack[top]
top = 0
end
+ P("\14") / function()
result.xuid = concat(stack,"",1,top)
top = 0
end
+ P("\15") / function()
result.charset = stack[top]
top = 0
end
+ P("\16") / function()
result.encoding = stack[top]
top = 0
end
+ P("\17") / function()
result.charstrings = stack[top]
top = 0
end
+ P("\18") / function()
result.private = {
size = stack[top-1],
offset = stack[top],
}
top = 0
end
+ P("\19") / function()
result.subroutines = stack[top]
end
+ P("\20") / function()
result.defaultwidthx = stack[top]
end
+ P("\21") / function()
result.nominalwidthx = stack[top]
end
-- + P("\22") / function() end -- reserved
-- + P("\23") / function() end -- reserved
-- + P("\24") / function() end -- reserved
-- + P("\25") / function() end -- reserved
-- + P("\26") / function() end -- reserved
-- + P("\27") / function() end -- reserved
local p_double = P("\12") * (
P("\00") / function()
result.copyright = stack[top]
top = 0
end
+ P("\01") / function()
result.monospaced = stack[top] == 1 and true or false -- isfixedpitch
top = 0
end
+ P("\02") / function()
result.italicangle = stack[top]
top = 0
end
+ P("\03") / function()
result.underlineposition = stack[top]
top = 0
end
+ P("\04") / function()
result.underlinethickness = stack[top]
top = 0
end
+ P("\05") / function()
result.painttype = stack[top]
top = 0
end
+ P("\06") / function()
result.charstringtype = stack[top]
top = 0
end
+ P("\07") / function()
result.fontmatrix = { unpack(stack,1,6) }
top = 0
end
+ P("\08") / function()
result.strokewidth = stack[top]
top = 0
end
+ P("\20") / function()
result.syntheticbase = stack[top]
top = 0
end
+ P("\21") / function()
result.postscript = strings[stack[top]] or "unset"
top = 0
end
+ P("\22") / function()
result.basefontname = strings[stack[top]] or "unset"
top = 0
end
+ P("\21") / function()
result.basefontblend = stack[top]
top = 0
end
+ P("\30") / function()
result.cid.registry = strings[stack[top-2]] or "unset"
result.cid.ordering = strings[stack[top-1]] or "unset"
result.cid.supplement = stack[top]
top = 0
end
+ P("\31") / function()
result.cid.fontversion = stack[top]
top = 0
end
+ P("\32") / function()
result.cid.fontrevision= stack[top]
top = 0
end
+ P("\33") / function()
result.cid.fonttype = stack[top]
top = 0
end
+ P("\34") / function()
result.cid.count = stack[top]
top = 0
end
+ P("\35") / function()
result.cid.uidbase = stack[top]
top = 0
end
+ P("\36") / function()
result.cid.fdarray = stack[top]
top = 0
end
+ P("\37") / function()
result.cid.fdselect = stack[top]
top = 0
end
+ P("\38") / function()
result.cid.fontname = strings[stack[top]] or "unset"
top = 0
end
)
-- Some lpeg fun ... a first variant split the byte and made a new string but
-- the second variant is much faster. Not that it matters much as we don't see
-- such numbers often.
local p_last = P("\x0F") / "0" + P("\x1F") / "1" + P("\x2F") / "2" + P("\x3F") / "3"
+ P("\x4F") / "4" + P("\x5F") / "5" + P("\x6F") / "6" + P("\x7F") / "7"
+ P("\x8F") / "8" + P("\x9F") / "9" + P("\xAF") / "" + P("\xBF") / ""
+ P("\xCF") / "" + P("\xDF") / "" + P("\xEF") / "" + R("\xF0\xFF") / ""
-- local remap = { [0] =
-- "00", "01", "02", "03", "04", "05", "06", "07", "08", "09", "0.", "0E", "0E-", "0", "0-", "0",
-- "10", "11", "12", "13", "14", "15", "16", "17", "18", "19", "0.", "0E", "0E-", "0", "0-", "0",
-- "20", "21", "22", "23", "24", "25", "26", "27", "28", "29", "0.", "0E", "0E-", "0", "0-", "0",
-- "30", "31", "32", "33", "34", "35", "36", "37", "38", "39", "0.", "0E", "0E-", "0", "0-", "0",
-- "40", "41", "42", "43", "44", "45", "46", "47", "48", "49", "0.", "0E", "0E-", "0", "0-", "0",
-- "50", "51", "52", "53", "54", "55", "56", "57", "58", "59", "0.", "0E", "0E-", "0", "0-", "0",
-- "60", "61", "62", "63", "64", "65", "66", "67", "68", "69", "0.", "0E", "0E-", "0", "0-", "0",
-- "70", "71", "72", "73", "74", "75", "76", "77", "78", "79", "0.", "0E", "0E-", "0", "0-", "0",
-- "80", "81", "82", "83", "84", "85", "86", "87", "88", "89", "0.", "0E", "0E-", "0", "0-", "0",
-- "90", "91", "92", "93", "94", "95", "96", "97", "98", "99", "0.", "0E", "0E-", "0", "0-", "0",
-- ".0", ".1", ".2", ".3", ".4", ".5", ".6", ".7", ".8", ".9", "..", ".E", ".E-", ".", ".-", ".",
-- "E0", "E1", "E2", "E3", "E4", "E5", "E6", "E7", "E8", "E9", "E.", "EE", "EE-", "E", "E-", "E",
-- "E-0", "E-1", "E-2", "E-3", "E-4", "E-5", "E-6", "E-7", "E-8", "E-9", "E-.", "E-E", "E-E-", "E-", "E--", "E-",
-- "-0", "-1", "-2", "-3", "-4", "-5", "-6", "-7", "-8", "-9", "-.", "-E", "-E-", "-", "--", "-",
-- }
-- local p_nibbles = Cs(((1-p_last)/byte/remap)^0+p_last)
-- local p = P("\30") * p_nibbles / function(t)
-- print(tonumber(t))
-- end
local remap = {
["\x00"] = "00", ["\x01"] = "01", ["\x02"] = "02", ["\x03"] = "03", ["\x04"] = "04", ["\x05"] = "05", ["\x06"] = "06", ["\x07"] = "07", ["\x08"] = "08", ["\x09"] = "09", ["\x0A"] = "0.", ["\x0B"] = "0E", ["\x0C"] = "0E-", ["\x0D"] = "0", ["\x0E"] = "0-", ["\x0F"] = "0",
["\x10"] = "10", ["\x11"] = "11", ["\x12"] = "12", ["\x13"] = "13", ["\x14"] = "14", ["\x15"] = "15", ["\x16"] = "16", ["\x17"] = "17", ["\x18"] = "18", ["\x19"] = "19", ["\x1A"] = "0.", ["\x1B"] = "0E", ["\x1C"] = "0E-", ["\x1D"] = "0", ["\x1E"] = "0-", ["\x1F"] = "0",
["\x20"] = "20", ["\x21"] = "21", ["\x22"] = "22", ["\x23"] = "23", ["\x24"] = "24", ["\x25"] = "25", ["\x26"] = "26", ["\x27"] = "27", ["\x28"] = "28", ["\x29"] = "29", ["\x2A"] = "0.", ["\x2B"] = "0E", ["\x2C"] = "0E-", ["\x2D"] = "0", ["\x2E"] = "0-", ["\x2F"] = "0",
["\x30"] = "30", ["\x31"] = "31", ["\x32"] = "32", ["\x33"] = "33", ["\x34"] = "34", ["\x35"] = "35", ["\x36"] = "36", ["\x37"] = "37", ["\x38"] = "38", ["\x39"] = "39", ["\x3A"] = "0.", ["\x3B"] = "0E", ["\x3C"] = "0E-", ["\x3D"] = "0", ["\x3E"] = "0-", ["\x3F"] = "0",
["\x40"] = "40", ["\x41"] = "41", ["\x42"] = "42", ["\x43"] = "43", ["\x44"] = "44", ["\x45"] = "45", ["\x46"] = "46", ["\x47"] = "47", ["\x48"] = "48", ["\x49"] = "49", ["\x4A"] = "0.", ["\x4B"] = "0E", ["\x4C"] = "0E-", ["\x4D"] = "0", ["\x4E"] = "0-", ["\x4F"] = "0",
["\x50"] = "50", ["\x51"] = "51", ["\x52"] = "52", ["\x53"] = "53", ["\x54"] = "54", ["\x55"] = "55", ["\x56"] = "56", ["\x57"] = "57", ["\x58"] = "58", ["\x59"] = "59", ["\x5A"] = "0.", ["\x5B"] = "0E", ["\x5C"] = "0E-", ["\x5D"] = "0", ["\x5E"] = "0-", ["\x5F"] = "0",
["\x60"] = "60", ["\x61"] = "61", ["\x62"] = "62", ["\x63"] = "63", ["\x64"] = "64", ["\x65"] = "65", ["\x66"] = "66", ["\x67"] = "67", ["\x68"] = "68", ["\x69"] = "69", ["\x6A"] = "0.", ["\x6B"] = "0E", ["\x6C"] = "0E-", ["\x6D"] = "0", ["\x6E"] = "0-", ["\x6F"] = "0",
["\x70"] = "70", ["\x71"] = "71", ["\x72"] = "72", ["\x73"] = "73", ["\x74"] = "74", ["\x75"] = "75", ["\x76"] = "76", ["\x77"] = "77", ["\x78"] = "78", ["\x79"] = "79", ["\x7A"] = "0.", ["\x7B"] = "0E", ["\x7C"] = "0E-", ["\x7D"] = "0", ["\x7E"] = "0-", ["\x7F"] = "0",
["\x80"] = "80", ["\x81"] = "81", ["\x82"] = "82", ["\x83"] = "83", ["\x84"] = "84", ["\x85"] = "85", ["\x86"] = "86", ["\x87"] = "87", ["\x88"] = "88", ["\x89"] = "89", ["\x8A"] = "0.", ["\x8B"] = "0E", ["\x8C"] = "0E-", ["\x8D"] = "0", ["\x8E"] = "0-", ["\x8F"] = "0",
["\x90"] = "90", ["\x91"] = "91", ["\x92"] = "92", ["\x93"] = "93", ["\x94"] = "94", ["\x95"] = "95", ["\x96"] = "96", ["\x97"] = "97", ["\x98"] = "98", ["\x99"] = "99", ["\x9A"] = "0.", ["\x9B"] = "0E", ["\x9C"] = "0E-", ["\x9D"] = "0", ["\x9E"] = "0-", ["\x9F"] = "0",
["\xA0"] = ".0", ["\xA1"] = ".1", ["\xA2"] = ".2", ["\xA3"] = ".3", ["\xA4"] = ".4", ["\xA5"] = ".5", ["\xA6"] = ".6", ["\xA7"] = ".7", ["\xA8"] = ".8", ["\xA9"] = ".9", ["\xAA"] = "..", ["\xAB"] = ".E", ["\xAC"] = ".E-", ["\xAD"] = ".", ["\xAE"] = ".-", ["\xAF"] = ".",
["\xB0"] = "E0", ["\xB1"] = "E1", ["\xB2"] = "E2", ["\xB3"] = "E3", ["\xB4"] = "E4", ["\xB5"] = "E5", ["\xB6"] = "E6", ["\xB7"] = "E7", ["\xB8"] = "E8", ["\xB9"] = "E9", ["\xBA"] = "E.", ["\xBB"] = "EE", ["\xBC"] = "EE-", ["\xBD"] = "E", ["\xBE"] = "E-", ["\xBF"] = "E",
["\xC0"] = "E-0", ["\xC1"] = "E-1", ["\xC2"] = "E-2", ["\xC3"] = "E-3", ["\xC4"] = "E-4", ["\xC5"] = "E-5", ["\xC6"] = "E-6", ["\xC7"] = "E-7", ["\xC8"] = "E-8", ["\xC9"] = "E-9", ["\xCA"] = "E-.", ["\xCB"] = "E-E", ["\xCC"] = "E-E-", ["\xCD"] = "E-", ["\xCE"] = "E--", ["\xCF"] = "E-",
["\xD0"] = "-0", ["\xD1"] = "-1", ["\xD2"] = "-2", ["\xD3"] = "-3", ["\xD4"] = "-4", ["\xD5"] = "-5", ["\xD6"] = "-6", ["\xD7"] = "-7", ["\xD8"] = "-8", ["\xD9"] = "-9", ["\xDA"] = "-.", ["\xDB"] = "-E", ["\xDC"] = "-E-", ["\xDD"] = "-", ["\xDE"] = "--", ["\xDF"] = "-",
}
local p_nibbles = P("\30") * Cs(((1-p_last)/remap)^0+p_last) / function(n)
-- 0-9=digit a=. b=E c=E- d=reserved e=- f=finish
top = top + 1
stack[top] = tonumber(n) or 0
end
local p_byte = C(R("\32\246")) / function(b0)
-- -107 .. +107
top = top + 1
stack[top] = byte(b0) - 139
end
local p_positive = C(R("\247\250")) * C(1) / function(b0,b1)
-- +108 .. +1131
top = top + 1
stack[top] = (byte(b0)-247)*256 + byte(b1) + 108
end
local p_negative = C(R("\251\254")) * C(1) / function(b0,b1)
-- -1131 .. -108
top = top + 1
stack[top] = -(byte(b0)-251)*256 - byte(b1) - 108
end
local p_short = P("\28") * C(1) * C(1) / function(b1,b2)
-- -32768 .. +32767 : b1<<8 | b2
top = top + 1
local n = 0x100 * byte(b1) + byte(b2)
if n >= 0x8000 then
stack[top] = n - 0xFFFF - 1
else
stack[top] = n
end
end
local p_long = P("\29") * C(1) * C(1) * C(1) * C(1) / function(b1,b2,b3,b4)
-- -2^31 .. +2^31-1 : b1<<24 | b2<<16 | b3<<8 | b4
top = top + 1
local n = 0x1000000 * byte(b1) + 0x10000 * byte(b2) + 0x100 * byte(b3) + byte(b4)
if n >= 0x8000000 then
stack[top] = n - 0xFFFFFFFF - 1
else
stack[top] = n
end
end
local p_unsupported = P(1) / function(detail)
top = 0
end
local p_dictionary = (
p_byte
+ p_positive
+ p_negative
+ p_short
+ p_long
+ p_nibbles
+ p_single
+ p_double
+ p_unsupported
)^1
parsedictionaries = function(data,dictionaries)
stack = { }
strings = data.strings
for i=1,#dictionaries do
top = 0
result = {
monospaced = false,
italicangle = 0,
underlineposition = -100,
underlinethickness = 50,
painttype = 0,
charstringtype = 2,
fontmatrix = { 0.001, 0, 0, 0.001, 0, 0 },
fontbbox = { 0, 0, 0, 0 },
strokewidth = 0,
charset = 0,
encoding = 0,
cid = {
fontversion = 0,
fontrevision = 0,
fonttype = 0,
count = 8720,
}
}
lpegmatch(p_dictionary,dictionaries[i])
dictionaries[i] = result
end
--
result = { }
top = 0
stack = { }
end
parseprivates = function(data,dictionaries)
stack = { }
strings = data.strings
for i=1,#dictionaries do
local private = dictionaries[i].private
if private and private.data then
top = 0
result = {
forcebold = false,
languagegroup = 0,
expansionfactor = 0.06,
initialrandomseed = 0,
subroutines = 0,
defaultwidthx = 0,
nominalwidthx = 0,
cid = {
-- actually an error
},
}
lpegmatch(p_dictionary,private.data)
private.data = result
end
end
result = { }
top = 0
stack = { }
end
-- All bezier curves have 6 points with successive pairs relative to
-- the previous pair. Some can be left out and are then copied or zero
-- (optimization).
--
-- We are not really interested in all the details of a glyph because we
-- only need to calculate the boundingbox. So, todo: a quick no result but
-- calculate only variant.
--
-- The conversion is straightforward and the specification os clear once
-- you understand that the x and y needs to be updates each step. It's also
-- quite easy to test because in mp a shape will look bad when a few variables
-- are swapped. But still there might be bugs down here because not all
-- variants are seen in a font so far. We are less compact that the ff code
-- because there quite some variants are done in one helper with a lot of
-- testing for states.
local x = 0
local y = 0
local width = false
local r = 0
local stems = 0
local globalbias = 0
local localbias = 0
local globals = false
local locals = false
local depth = 1
local xmin = 0
local xmax = 0
local ymin = 0
local ymax = 0
local checked = false
local keepcurve = false
local function showstate(where)
report("%w%-10s : [%s] n=%i",depth*2,where,concat(stack," ",1,top),top)
end
local function showvalue(where,value,showstack)
if showstack then
report("%w%-10s : %s : [%s] n=%i",depth*2,where,tostring(value),concat(stack," ",1,top),top)
else
report("%w%-10s : %s",depth*2,where,tostring(value))
end
end
-- All these indirect calls make this run slower but it's cleaner this way
-- and we cache the result. As we moved the boundingbox code inline we gain
-- some back.
local function moveto(x,y)
if keepcurve then
r = r + 1
result[r] = { x, y, "m" }
end
if checked then
if x < xmin then xmin = x elseif x > xmax then xmax = x end
if y < ymin then ymin = y elseif y > ymax then ymax = y end
else
xmin = x
ymin = y
xmax = x
ymax = y
checked = true
end
end
local function lineto(x,y)
if keepcurve then
r = r + 1
result[r] = { x, y, "l" }
end
if checked then
if x < xmin then xmin = x elseif x > xmax then xmax = x end
if y < ymin then ymin = y elseif y > ymax then ymax = y end
else
xmin = x
ymin = y
xmax = x
ymax = y
checked = true
end
end
local function curveto(x1,y1,x2,y2,x3,y3)
if keepcurve then
r = r + 1
result[r] = { x1, y1, x2, y2, x3, y3, "c" }
end
if checked then
if x1 < xmin then xmin = x1 elseif x1 > xmax then xmax = x1 end
if y1 < ymin then ymin = y1 elseif y1 > ymax then ymax = y1 end
else
xmin = x1
ymin = y1
xmax = x1
ymax = y1
checked = true
end
if x2 < xmin then xmin = x2 elseif x2 > xmax then xmax = x2 end
if y2 < ymin then ymin = y2 elseif y2 > ymax then ymax = y2 end
if x3 < xmin then xmin = x3 elseif x3 > xmax then xmax = x3 end
if y3 < ymin then ymin = y3 elseif y3 > ymax then ymax = y3 end
end
local function rmoveto()
if top > 2 then
if not width then
width = stack[1]
if trace_charstrings then
showvalue("width",width)
end
end
elseif not width then
width = true
end
if trace_charstrings then
showstate("rmoveto")
end
x = x + stack[top-1] -- dx1
y = y + stack[top] -- dy1
top = 0
moveto(x,y)
end
local function hmoveto()
if top > 1 then
if not width then
width = stack[1]
if trace_charstrings then
showvalue("width",width)
end
end
elseif not width then
width = true
end
if trace_charstrings then
showstate("hmoveto")
end
x = x + stack[top] -- dx1
top = 0
moveto(x,y)
end
local function vmoveto()
if top > 1 then
if not width then
width = stack[1]
if trace_charstrings then
showvalue("width",width)
end
end
elseif not width then
width = true
end
if trace_charstrings then
showstate("vmoveto")
end
y = y + stack[top] -- dy1
top = 0
moveto(x,y)
end
local function rlineto()
if trace_charstrings then
showstate("rlineto")
end
for i=1,top,2 do
x = x + stack[i] -- dxa
y = y + stack[i+1] -- dya
lineto(x,y)
end
top = 0
end
local function xlineto(swap) -- x (y,x)+ | (x,y)+
for i=1,top do
if swap then
x = x + stack[i]
swap = false
else
y = y + stack[i]
swap = true
end
lineto(x,y)
end
top = 0
end
local function hlineto() -- x (y,x)+ | (x,y)+
if trace_charstrings then
showstate("hlineto")
end
xlineto(true)
end
local function vlineto() -- y (x,y)+ | (y,x)+
if trace_charstrings then
showstate("vlineto")
end
xlineto(false)
end
local function rrcurveto()
if trace_charstrings then
showstate("rrcurveto")
end
for i=1,top,6 do
local ax = x + stack[i] -- dxa
local ay = y + stack[i+1] -- dya
local bx = ax + stack[i+2] -- dxb
local by = ay + stack[i+3] -- dyb
x = bx + stack[i+4] -- dxc
y = by + stack[i+5] -- dyc
curveto(ax,ay,bx,by,x,y)
end
top = 0
end
local function hhcurveto()
if trace_charstrings then
showstate("hhcurveto")
end
local s = 1
if top % 2 ~= 0 then
y = y + stack[1] -- dy1
s = 2
end
for i=s,top,4 do
local ax = x + stack[i] -- dxa
local ay = y
local bx = ax + stack[i+1] -- dxb
local by = ay + stack[i+2] -- dyb
x = bx + stack[i+3] -- dxc
y = by
curveto(ax,ay,bx,by,x,y)
end
top = 0
end
local function vvcurveto()
if trace_charstrings then
showstate("vvcurveto")
end
local s = 1
local d = 0
if top % 2 ~= 0 then
d = stack[1] -- dx1
s = 2
end
for i=s,top,4 do
local ax = x + d
local ay = y + stack[i] -- dya
local bx = ax + stack[i+1] -- dxb
local by = ay + stack[i+2] -- dyb
x = bx
y = by + stack[i+3] -- dyc
curveto(ax,ay,bx,by,x,y)
d = 0
end
top = 0
end
local function xxcurveto(swap)
local last = top % 4 ~= 0 and stack[top]
if last then
top = top - 1
end
local sw = swap
for i=1,top,4 do
local ax, ay, bx, by
if swap then
ax = x + stack[i]
ay = y
bx = ax + stack[i+1]
by = ay + stack[i+2]
y = by + stack[i+3]
if last and i+3 == top then
x = bx + last
else
x = bx
end
swap = false
else
ax = x
ay = y + stack[i]
bx = ax + stack[i+1]
by = ay + stack[i+2]
x = bx + stack[i+3]
if last and i+3 == top then
y = by + last
else
y = by
end
swap = true
end
curveto(ax,ay,bx,by,x,y)
end
top = 0
end
local function hvcurveto()
if trace_charstrings then
showstate("hvcurveto")
end
xxcurveto(true)
end
local function vhcurveto()
if trace_charstrings then
showstate("vhcurveto")
end
xxcurveto(false)
end
local function rcurveline()
if trace_charstrings then
showstate("rcurveline")
end
for i=1,top-2,6 do
local ax = x + stack[i] -- dxa
local ay = y + stack[i+1] -- dya
local bx = ax + stack[i+2] -- dxb
local by = ay + stack[i+3] -- dyb
x = bx + stack[i+4] -- dxc
y = by + stack[i+5] -- dyc
curveto(ax,ay,bx,by,x,y)
end
x = x + stack[top-1] -- dxc
y = y + stack[top] -- dyc
lineto(x,y)
top = 0
end
local function rlinecurve()
if trace_charstrings then
showstate("rlinecurve")
end
if top > 6 then
for i=1,top-6,2 do
x = x + stack[i]
y = y + stack[i+1]
lineto(x,y)
end
end
local ax = x + stack[top-5]
local ay = y + stack[top-4]
local bx = ax + stack[top-3]
local by = ay + stack[top-2]
x = bx + stack[top-1]
y = by + stack[top]
curveto(ax,ay,bx,by,x,y)
top = 0
end
-- flex is not yet tested! no loop
local function flex() -- fd not used
if trace_charstrings then
showstate("flex")
end
local ax = x + stack[1] -- dx1
local ay = y + stack[2] -- dy1
local bx = ax + stack[3] -- dx2
local by = ay + stack[4] -- dy2
local cx = bx + stack[5] -- dx3
local cy = by + stack[6] -- dy3
curveto(ax,ay,bx,by,cx,cy)
local dx = cx + stack[7] -- dx4
local dy = cy + stack[8] -- dy4
local ex = dx + stack[9] -- dx5
local ey = dy + stack[10] -- dy5
x = ex + stack[11] -- dx6
y = ey + stack[12] -- dy6
curveto(dx,dy,ex,ey,x,y)
top = 0
end
local function hflex()
if trace_charstrings then
showstate("hflex")
end
local ax = x + stack[1] -- dx1
local ay = y
local bx = ax + stack[2] -- dx2
local by = ay + stack[3] -- dy2
local cx = bx + stack[4] -- dx3
local cy = by
curveto(ax,ay,bx,by,cx,cy)
local dx = cx + stack[5] -- dx4
local dy = by
local ex = dx + stack[6] -- dx5
local ey = y
x = ex + stack[7] -- dx6
curveto(dx,dy,ex,ey,x,y)
top = 0
end
local function hflex1()
if trace_charstrings then
showstate("hflex1")
end
local ax = x + stack[1] -- dx1
local ay = y + stack[2] -- dy1
local bx = ax + stack[3] -- dx2
local by = ay + stack[4] -- dy2
local cx = bx + stack[5] -- dx3
local cy = by
curveto(ax,ay,bx,by,cx,cy)
local dx = cx + stack[6] -- dx4
local dy = by
local ex = dx + stack[7] -- dx5
local ey = dy + stack[8] -- dy5
x = ex + stack[9] -- dx6
curveto(dx,dy,ex,ey,x,y)
top = 0
end
local function flex1()
if trace_charstrings then
showstate("flex1")
end
local ax = x + stack[1] --dx1
local ay = y + stack[2] --dy1
local bx = ax + stack[3] --dx2
local by = ay + stack[4] --dy2
local cx = bx + stack[5] --dx3
local cy = by + stack[6] --dy3
curveto(ax,ay,bx,by,cx,cy)
local dx = cx + stack[7] --dx4
local dy = cy + stack[8] --dy4
local ex = dx + stack[9] --dx5
local ey = dy + stack[10] --dy5
if abs(ex - x) > abs(ey - y) then -- spec: abs(dx) > abs(dy)
x = ex + stack[11]
else
y = ey + stack[11]
end
curveto(dx,dy,ex,ey,x,y)
top = 0
end
local function getstem()
if top == 0 then
-- bad
elseif top % 2 ~= 0 then
if width then
remove(stack,1)
else
width = remove(stack,1)
if trace_charstrings then
showvalue("width",width)
end
end
top = top - 1
end
if trace_charstrings then
showstate("stem")
end
stems = stems + top/2
top = 0
end
local function getmask()
if top == 0 then
-- bad
elseif top % 2 ~= 0 then
if width then
remove(stack,1)
else
width = remove(stack,1)
if trace_charstrings then
showvalue("width",width)
end
end
top = top - 1
end
if trace_charstrings then
showstate(operator == 19 and "hintmark" or "cntrmask")
end
stems = stems + top/2
top = 0
if stems == 0 then
-- forget about it
elseif stems <= 8 then
return 1
else
return floor((stems+7)/8)
end
end
local function unsupported()
if trace_charstrings then
showstate("unsupported")
end
top = 0
end
-- Bah, we cannot use a fast lpeg because a hint has an unknown size and a
-- runtime capture cannot handle that well.
local actions = { [0] =
unsupported, -- 0
getstem, -- 1 -- hstem
unsupported, -- 2
getstem, -- 3 -- vstem
vmoveto, -- 4
rlineto, -- 5
hlineto, -- 6
vlineto, -- 7
rrcurveto, -- 8
unsupported, -- 9 -- closepath
unsupported, -- 10 -- calllocal,
unsupported, -- 11 -- callreturn,
unsupported, -- 12 -- elsewhere
unsupported, -- 13 -- hsbw
unsupported, -- 14 -- endchar,
unsupported, -- 15
unsupported, -- 16
unsupported, -- 17
getstem, -- 18 -- hstemhm
getmask, -- 19 -- hintmask
getmask, -- 20 -- cntrmask
rmoveto, -- 21
hmoveto, -- 22
getstem, -- 23 -- vstemhm
rcurveline, -- 24
rlinecurve, -- 25
vvcurveto, -- 26
hhcurveto, -- 27
unsupported, -- 28 -- elsewhere
unsupported, -- 29 -- elsewhere
vhcurveto, -- 30
hvcurveto, -- 31
}
local subactions = {
[034] = hflex,
[035] = flex,
[036] = hflex1,
[037] = flex1,
}
local p_bytes = Ct((P(1)/byte)^0)
local function call(scope,list,bias,process)
local index = stack[top] + bias
top = top - 1
if trace_charstrings then
showvalue(scope,index,true)
end
local str = list[index]
if str then
if type(str) == "string" then
str = lpegmatch(p_bytes,str)
list[index] = str
end
depth = depth + 1
process(str)
depth = depth - 1
else
report("unknown %s %i",scope,index)
end
end
local function process(tab)
local i = 1
local n = #tab
while i <= n do
local t = tab[i]
if t >= 32 and t<=246 then
-- -107 .. +107
top = top + 1
stack[top] = t - 139
i = i + 1
elseif t >= 247 and t <= 250 then
-- +108 .. +1131
top = top + 1
stack[top] = (t-247)*256 + tab[i+1] + 108
i = i + 2
elseif t >= 251 and t <= 254 then
-- -1131 .. -108
top = top + 1
stack[top] = -(t-251)*256 - tab[i+1] - 108
i = i + 2
elseif t == 28 then
-- -32768 .. +32767 : b1<<8 | b2
top = top + 1
local n = 0x100 * tab[i+1] + tab[i+2]
if n >= 0x8000 then
stack[top] = n - 0xFFFF - 1
else
stack[top] = n
end
i = i + 3
elseif t == 255 then
local n = 0x100 * tab[i+1] + tab[i+2]
top = top + 1
if n >= 0x8000 then
stack[top] = n - 0xFFFF - 1 + (0x100 * tab[i+3] + tab[i+4])/0xFFFF
else
stack[top] = n + (0x100 * tab[i+3] + tab[i+4])/0xFFFF
end
i = i + 5
elseif t == 11 then
if trace_charstrings then
showstate("return")
end
return
elseif t == 10 then
call("local",locals,localbias,process)
i = i + 1
elseif t == 14 then -- endchar
if width then
-- okay
elseif top > 0 then
width = stack[1]
if trace_charstrings then
showvalue("width",width)
end
else
width = true
end
if trace_charstrings then
showstate("endchar")
end
return
elseif t == 29 then
call("global",globals,globalbias,process)
i = i + 1
elseif t == 12 then
i = i + 1
local t = tab[i]
local a = subactions[t]
if a then
a()
else
if trace_charstrings then
showvalue("<subaction>",t)
end
top = 0
end
i = i + 1
else
local a = actions[t]
if a then
local s = a()
if s then
i = i + s
end
else
if trace_charstrings then
showvalue("<action>",t)
end
top = 0
end
i = i + 1
end
end
end
-- local function calculatebounds(segments,x,y)
-- local nofsegments = #segments
-- if nofsegments == 0 then
-- return { x, y, x, y }
-- else
-- local xmin = 10000
-- local xmax = -10000
-- local ymin = 10000
-- local ymax = -10000
-- if x < xmin then xmin = x end
-- if x > xmax then xmax = x end
-- if y < ymin then ymin = y end
-- if y > ymax then ymax = y end
-- -- we now have a reasonable start so we could
-- -- simplyfy the next checks
-- for i=1,nofsegments do
-- local s = segments[i]
-- local x = s[1]
-- local y = s[2]
-- if x < xmin then xmin = x end
-- if x > xmax then xmax = x end
-- if y < ymin then ymin = y end
-- if y > ymax then ymax = y end
-- if s[#s] == "c" then -- "curveto"
-- local x = s[3]
-- local y = s[4]
-- if x < xmin then xmin = x elseif x > xmax then xmax = x end
-- if y < ymin then ymin = y elseif y > ymax then ymax = y end
-- local x = s[5]
-- local y = s[6]
-- if x < xmin then xmin = x elseif x > xmax then xmax = x end
-- if y < ymin then ymin = y elseif y > ymax then ymax = y end
-- end
-- end
-- return { round(xmin), round(ymin), round(xmax), round(ymax) } -- doesn't make ceil more sense
-- end
-- end
parsecharstrings = function(data,glyphs,doshapes)
-- for all charstrings
local dictionary = data.dictionaries[1]
local charstrings = dictionary.charstrings
local charset = dictionary.charset
keepcurve = doshapes
stack = { }
glyphs = glyphs or { }
strings = data.strings
locals = dictionary.subroutines
globals = data.routines
globalbias = #globals
localbias = #locals
globalbias = ((globalbias < 1240 and 107) or (globalbias < 33900 and 1131) or 32768) + 1
localbias = ((localbias < 1240 and 107) or (localbias < 33900 and 1131) or 32768) + 1
local nominalwidth = dictionary.private.data.nominalwidthx or 0
local defaultwidth = dictionary.private.data.defaultwidthx or 0
for i=1,#charstrings do
local str = charstrings[i]
local tab = lpegmatch(p_bytes,str)
local index = i - 1
x = 0
y = 0
width = false
r = 0
top = 0
stems = 0
result = { }
--
xmin = 0
xmax = 0
ymin = 0
ymax = 0
checked = false
--
if trace_charstrings then
report("glyph: %i",index)
report("data: % t",tab)
end
--
process(tab)
--
local boundingbox = { round(xmin), round(ymin), round(xmax), round(ymax) }
--
if width == true or width == false then
width = defaultwidth
else
width = nominalwidth + width
end
--
-- trace_charstrings = index == 3078 -- todo: make tracker
local glyph = glyphs[index] -- can be autodefined in otr
if not glyph then
glyphs[index] = {
segments = doshapes ~= false and result or nil, -- optional
boundingbox = boundingbox,
width = width,
name = charset[index],
-- sidebearing = 0,
}
else
glyph.segments = doshapes ~= false and result or nil
glyph.boundingbox = boundingbox
if not glyph.width then
glyph.width = width
end
if charset and not glyph.name then
glyph.name = charset[index]
end
-- glyph.sidebearing = 0 -- todo
end
if trace_charstrings then
report("width: %s",tostring(width))
report("boundingbox: % t",boundingbox)
end
charstrings[i] = nil -- free memory
end
return glyphs
end
parsecharstring = function(data,dictionary,charstring,glyphs,index,doshapes)
local private = dictionary.private
keepcurve = doshapes
strings = data.strings -- or in dict?
locals = dictionary.subroutines or { }
globals = data.routines or { }
globalbias = #globals
localbias = #locals
globalbias = ((globalbias < 1240 and 107) or (globalbias < 33900 and 1131) or 32768) + 1
localbias = ((localbias < 1240 and 107) or (localbias < 33900 and 1131) or 32768) + 1
local nominalwidth = private and private.data.nominalwidthx or 0
local defaultwidth = private and private.data.defaultwidthx or 0
--
local tab = lpegmatch(p_bytes,charstring)
x = 0
y = 0
width = false
r = 0
top = 0
stems = 0
result = { }
--
xmin = 0
xmax = 0
ymin = 0
ymax = 0
checked = false
--
if trace_charstrings then
report("glyph: %i",index)
report("data: % t",tab)
end
--
process(tab)
--
local boundingbox = { xmin, ymin, xmax, ymax }
--
if width == true or width == false then
width = defaultwidth
else
width = nominalwidth + width
end
--
index = index - 1
local glyph = glyphs[index] -- can be autodefined in otr
if not glyph then
glyphs[index] = {
segments = doshapes ~= false and result or nil, -- optional
boundingbox = boundingbox,
width = width,
name = charset[index],
-- sidebearing = 0,
}
else
glyph.segments = doshapes ~= false and result or nil
glyph.boundingbox = boundingbox
if not glyph.width then
glyph.width = width
end
if charset and not glyph.name then
glyph.name = charset[index]
end
-- glyph.sidebearing = 0 -- todo
end
--
if trace_charstrings then
report("width: %s",tostring(width))
report("boundingbox: % t",boundingbox)
end
--
return charstring
end
resetcharstrings = function()
result = { }
top = 0
stack = { }
end
end
local function readglobals(f,data)
local routines = readlengths(f)
for i=1,#routines do
routines[i] = readstring(f,routines[i])
end
data.routines = routines
end
local function readencodings(f,data)
data.encodings = { }
end
local function readcharsets(f,data,dictionary)
local header = data.header
local strings = data.strings
local nofglyphs = data.nofglyphs
local charsetoffset = dictionary.charset
if charsetoffset ~= 0 then
setposition(f,header.offset+charsetoffset)
local format = readbyte(f)
local charset = { [0] = ".notdef" }
dictionary.charset = charset
if format == 0 then
for i=1,nofglyphs do
charset[i] = strings[readushort(f)]
end
elseif format == 1 or format == 2 then
local readcount = format == 1 and readbyte or readushort
local i = 1
while i <= nofglyphs do
local sid = readushort(f)
local n = readcount(f)
for s=sid,sid+n do
charset[i] = strings[s]
i = i + 1
if i > nofglyphs then
break
end
end
end
else
report("cff parser: unsupported charset format %a",format)
end
end
end
local function readprivates(f,data)
local header = data.header
local dictionaries = data.dictionaries
local private = dictionaries[1].private
if private then
setposition(f,header.offset+private.offset)
private.data = readstring(f,private.size)
end
end
local function readlocals(f,data,dictionary)
local header = data.header
local private = dictionary.private
if private then
local subroutineoffset = private.data.subroutines
if subroutineoffset ~= 0 then
setposition(f,header.offset+private.offset+subroutineoffset)
local subroutines = readlengths(f)
for i=1,#subroutines do
subroutines[i] = readstring(f,subroutines[i])
end
dictionary.subroutines = subroutines
private.data.subroutines = nil
else
dictionary.subroutines = { }
end
else
dictionary.subroutines = { }
end
end
-- These charstrings are little programs and described in: Technical Note #5177. A truetype
-- font has only one dictionary.
local function readcharstrings(f,data)
local header = data.header
local dictionaries = data.dictionaries
local dictionary = dictionaries[1]
local type = dictionary.charstringtype
local offset = dictionary.charstrings
if type == 2 then
setposition(f,header.offset+offset)
-- could be a metatable .. delayed loading
local charstrings = readlengths(f)
local nofglyphs = #charstrings
for i=1,nofglyphs do
charstrings[i] = readstring(f,charstrings[i])
end
data.nofglyphs = nofglyphs
dictionary.charstrings = charstrings
else
report("unsupported charstr type %i",type)
data.nofglyphs = 0
dictionary.charstrings = { }
end
end
-- cid (maybe do this stepwise so less mem) -- share with above
local function readcidprivates(f,data)
local header = data.header
local dictionaries = data.dictionaries[1].cid.dictionaries
for i=1,#dictionaries do
local dictionary = dictionaries[i]
local private = dictionary.private
if private then
setposition(f,header.offset+private.offset)
private.data = readstring(f,private.size)
end
end
parseprivates(data,dictionaries)
end
local function readnoselect(f,data,glyphs,doshapes)
local dictionaries = data.dictionaries
local dictionary = dictionaries[1]
readglobals(f,data)
readcharstrings(f,data)
readencodings(f,data)
readcharsets(f,data,dictionary)
readprivates(f,data)
parseprivates(data,data.dictionaries)
readlocals(f,data,dictionary)
parsecharstrings(data,glyphs,doshapes)
resetcharstrings()
end
local function readfdselect(f,data,glyphs,doshapes)
local header = data.header
local dictionaries = data.dictionaries
local dictionary = dictionaries[1]
local cid = dictionary.cid
local cidselect = cid and cid.fdselect
readglobals(f,data)
readcharstrings(f,data)
readencodings(f,data)
local charstrings = dictionary.charstrings
local fdindex = { }
local nofglyphs = data.nofglyphs
local maxindex = -1
setposition(f,header.offset+cidselect)
local format = readbyte(f)
if format == 1 then
for i=0,nofglyphs do -- notdef included (needs checking)
local index = readbyte(i)
fdindex[i] = index
if index > maxindex then
maxindex = index
end
end
elseif format == 3 then
local nofranges = readushort(f)
local first = readushort(f)
local index = readbyte(f)
while true do
local last = readushort(f)
if index > maxindex then
maxindex = index
end
for i=first,last do
fdindex[i] = index
end
if last >= nofglyphs then
break
else
first = last + 1
index = readbyte(f)
end
end
else
-- unsupported format
end
if maxindex >= 0 then
local cidarray = cid.fdarray
setposition(f,header.offset+cidarray)
local dictionaries = readlengths(f)
for i=1,#dictionaries do
dictionaries[i] = readstring(f,dictionaries[i])
end
parsedictionaries(data,dictionaries)
cid.dictionaries = dictionaries
readcidprivates(f,data)
for i=1,#dictionaries do
readlocals(f,data,dictionaries[i])
end
for i=1,#charstrings do
parsecharstring(data,dictionaries[fdindex[i]+1],charstrings[i],glyphs,i,doshapes)
end
resetcharstrings()
end
end
function readers.cff(f,fontdata,specification)
-- if specification.glyphs then
if specification.details then
local datatable = fontdata.tables.cff
if datatable then
local offset = datatable.offset
local glyphs = fontdata.glyphs
if not f then
report("invalid filehandle")
return
end
if offset then
setposition(f,offset)
end
local header = readheader(f)
if header.major > 1 then
report("version mismatch")
return
end
local names = readfontnames(f)
local dictionaries = readtopdictionaries(f)
local strings = readstrings(f)
local data = {
header = header,
names = names,
dictionaries = dictionaries,
strings = strings,
nofglyphs = fontdata.nofglyphs,
}
--
parsedictionaries(data,data.dictionaries)
--
local d = dictionaries[1]
local c = d.cid
fontdata.cffinfo = {
familynamename = d.familyname,
fullname = d.fullname,
boundingbox = d.boundingbox,
weight = d.weight,
italicangle = d.italicangle,
underlineposition = d.underlineposition,
underlinethickness = d.underlinethickness,
monospaced = d.monospaced,
}
fontdata.cidinfo = c and {
registry = c.registry,
ordering = c.ordering,
supplement = c.supplement,
}
--
if not specification.glyphs then
-- we only want some metadata
else
local cid = d.cid
if cid and cid.fdselect then
readfdselect(f,data,glyphs,specification.shapes or false)
else
readnoselect(f,data,glyphs,specification.shapes or false)
end
end
--
-- cleanup (probably more can go)
--
-- for i=1,#dictionaries do
-- local d = dictionaries[i]
-- d.subroutines = nil
-- end
-- data.strings = nil
-- if data then
-- data.charstrings = nil
-- data.routines = nil
-- end
end
end
end
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