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-rw-r--r--src/fontloader/misc/fontloader-font-cff.lua1698
1 files changed, 1698 insertions, 0 deletions
diff --git a/src/fontloader/misc/fontloader-font-cff.lua b/src/fontloader/misc/fontloader-font-cff.lua
new file mode 100644
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+++ b/src/fontloader/misc/fontloader-font-cff.lua
@@ -0,0 +1,1698 @@
+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