Behdad Esfahbod | 1ae2959 | 2014-01-14 15:07:50 +0800 | [diff] [blame^] | 1 | from __future__ import print_function, division, absolute_import |
Behdad Esfahbod | 30e691e | 2013-11-27 17:27:45 -0500 | [diff] [blame] | 2 | from fontTools.misc.py23 import * |
Behdad Esfahbod | 8413c10 | 2013-09-17 16:59:39 -0400 | [diff] [blame] | 3 | from fontTools.misc import sstruct |
Behdad Esfahbod | 7ed91ec | 2013-11-27 15:16:28 -0500 | [diff] [blame] | 4 | from fontTools.misc.textTools import safeEval |
Behdad Esfahbod | 30e691e | 2013-11-27 17:27:45 -0500 | [diff] [blame] | 5 | from . import DefaultTable |
jvr | 4cc0051 | 2006-10-21 13:27:25 +0000 | [diff] [blame] | 6 | |
| 7 | SINGFormat = """ |
| 8 | > # big endian |
| 9 | tableVersionMajor: H |
| 10 | tableVersionMinor: H |
| 11 | glyphletVersion: H |
| 12 | permissions: h |
| 13 | mainGID: H |
| 14 | unitsPerEm: H |
| 15 | vertAdvance: h |
| 16 | vertOrigin: h |
| 17 | uniqueName: 28s |
| 18 | METAMD5: 16s |
| 19 | nameLength: 1s |
| 20 | """ |
| 21 | # baseGlyphName is a byte string which follows the record above. |
| 22 | |
| 23 | |
| 24 | |
| 25 | class table_S_I_N_G_(DefaultTable.DefaultTable): |
| 26 | |
| 27 | dependencies = [] |
| 28 | |
| 29 | def decompile(self, data, ttFont): |
| 30 | dummy, rest = sstruct.unpack2(SINGFormat, data, self) |
| 31 | self.uniqueName = self.decompileUniqueName(self.uniqueName) |
Behdad Esfahbod | 319c5fd | 2013-11-27 18:13:48 -0500 | [diff] [blame] | 32 | self.nameLength = byteord(self.nameLength) |
jvr | 4cc0051 | 2006-10-21 13:27:25 +0000 | [diff] [blame] | 33 | assert len(rest) == self.nameLength |
Behdad Esfahbod | fd68c9d | 2013-11-28 15:04:23 -0500 | [diff] [blame] | 34 | self.baseGlyphName = tostr(rest) |
jvr | 4cc0051 | 2006-10-21 13:27:25 +0000 | [diff] [blame] | 35 | |
| 36 | rawMETAMD5 = self.METAMD5 |
Behdad Esfahbod | 319c5fd | 2013-11-27 18:13:48 -0500 | [diff] [blame] | 37 | self.METAMD5 = "[" + hex(byteord(self.METAMD5[0])) |
jvr | 4cc0051 | 2006-10-21 13:27:25 +0000 | [diff] [blame] | 38 | for char in rawMETAMD5[1:]: |
Behdad Esfahbod | 319c5fd | 2013-11-27 18:13:48 -0500 | [diff] [blame] | 39 | self.METAMD5 = self.METAMD5 + ", " + hex(byteord(char)) |
jvr | 4cc0051 | 2006-10-21 13:27:25 +0000 | [diff] [blame] | 40 | self.METAMD5 = self.METAMD5 + "]" |
| 41 | |
| 42 | def decompileUniqueName(self, data): |
| 43 | name = "" |
| 44 | for char in data: |
Behdad Esfahbod | 319c5fd | 2013-11-27 18:13:48 -0500 | [diff] [blame] | 45 | val = byteord(char) |
jvr | 4cc0051 | 2006-10-21 13:27:25 +0000 | [diff] [blame] | 46 | if val == 0: |
| 47 | break |
| 48 | if (val > 31) or (val < 128): |
Behdad Esfahbod | fd68c9d | 2013-11-28 15:04:23 -0500 | [diff] [blame] | 49 | name += chr(val) |
jvr | 4cc0051 | 2006-10-21 13:27:25 +0000 | [diff] [blame] | 50 | else: |
| 51 | octString = oct(val) |
| 52 | if len(octString) > 3: |
| 53 | octString = octString[1:] # chop off that leading zero. |
| 54 | elif len(octString) < 3: |
| 55 | octString.zfill(3) |
Behdad Esfahbod | fd68c9d | 2013-11-28 15:04:23 -0500 | [diff] [blame] | 56 | name += "\\" + octString |
jvr | 4cc0051 | 2006-10-21 13:27:25 +0000 | [diff] [blame] | 57 | return name |
| 58 | |
| 59 | |
| 60 | def compile(self, ttFont): |
Behdad Esfahbod | fd68c9d | 2013-11-28 15:04:23 -0500 | [diff] [blame] | 61 | d = self.__dict__.copy() |
| 62 | d["nameLength"] = bytechr(len(self.baseGlyphName)) |
| 63 | d["uniqueName"] = self.compilecompileUniqueName(self.uniqueName, 28) |
jvr | 4cc0051 | 2006-10-21 13:27:25 +0000 | [diff] [blame] | 64 | METAMD5List = eval(self.METAMD5) |
Behdad Esfahbod | fd68c9d | 2013-11-28 15:04:23 -0500 | [diff] [blame] | 65 | d["METAMD5"] = b"" |
jvr | 4cc0051 | 2006-10-21 13:27:25 +0000 | [diff] [blame] | 66 | for val in METAMD5List: |
Behdad Esfahbod | fd68c9d | 2013-11-28 15:04:23 -0500 | [diff] [blame] | 67 | d["METAMD5"] += bytechr(val) |
| 68 | assert (len(d["METAMD5"]) == 16), "Failed to pack 16 byte MD5 hash in SING table" |
| 69 | data = sstruct.pack(SINGFormat, d) |
| 70 | data = data + tobytes(self.baseGlyphName) |
jvr | 4cc0051 | 2006-10-21 13:27:25 +0000 | [diff] [blame] | 71 | return data |
| 72 | |
| 73 | def compilecompileUniqueName(self, name, length): |
| 74 | nameLen = len(name) |
| 75 | if length <= nameLen: |
Behdad Esfahbod | fd68c9d | 2013-11-28 15:04:23 -0500 | [diff] [blame] | 76 | name = name[:length-1] + "\000" |
jvr | 4cc0051 | 2006-10-21 13:27:25 +0000 | [diff] [blame] | 77 | else: |
Behdad Esfahbod | fd68c9d | 2013-11-28 15:04:23 -0500 | [diff] [blame] | 78 | name += (nameLen - length) * "\000" |
jvr | 4cc0051 | 2006-10-21 13:27:25 +0000 | [diff] [blame] | 79 | return name |
| 80 | |
| 81 | |
| 82 | def toXML(self, writer, ttFont): |
| 83 | writer.comment("Most of this table will be recalculated by the compiler") |
| 84 | writer.newline() |
| 85 | formatstring, names, fixes = sstruct.getformat(SINGFormat) |
| 86 | for name in names: |
| 87 | value = getattr(self, name) |
| 88 | writer.simpletag(name, value=value) |
| 89 | writer.newline() |
| 90 | writer.simpletag("baseGlyphName", value=self.baseGlyphName) |
| 91 | writer.newline() |
| 92 | |
Behdad Esfahbod | 3a9fd30 | 2013-11-27 03:19:32 -0500 | [diff] [blame] | 93 | def fromXML(self, name, attrs, content, ttFont): |
jvr | 4cc0051 | 2006-10-21 13:27:25 +0000 | [diff] [blame] | 94 | value = attrs["value"] |
| 95 | if name in ["uniqueName", "METAMD5", "baseGlyphName"]: |
| 96 | setattr(self, name, value) |
| 97 | else: |
Behdad Esfahbod | 7cc6d27 | 2013-11-27 04:00:15 -0500 | [diff] [blame] | 98 | setattr(self, name, safeEval(value)) |