100 lines
3.2 KiB
Python
100 lines
3.2 KiB
Python
from fontTools.misc import sstruct
|
|
from fontTools.misc.textTools import bytechr, byteord, tobytes, tostr, safeEval
|
|
from . import DefaultTable
|
|
|
|
SINGFormat = """
|
|
> # big endian
|
|
tableVersionMajor: H
|
|
tableVersionMinor: H
|
|
glyphletVersion: H
|
|
permissions: h
|
|
mainGID: H
|
|
unitsPerEm: H
|
|
vertAdvance: h
|
|
vertOrigin: h
|
|
uniqueName: 28s
|
|
METAMD5: 16s
|
|
nameLength: 1s
|
|
"""
|
|
# baseGlyphName is a byte string which follows the record above.
|
|
|
|
|
|
class table_S_I_N_G_(DefaultTable.DefaultTable):
|
|
"""Glyphlets SING table
|
|
|
|
The ``SING`` table is used by Adobe's SING Glyphlets.
|
|
|
|
See also https://web.archive.org/web/20080627183635/http://www.adobe.com/devnet/opentype/gdk/topic.html
|
|
"""
|
|
|
|
dependencies = []
|
|
|
|
def decompile(self, data, ttFont):
|
|
dummy, rest = sstruct.unpack2(SINGFormat, data, self)
|
|
self.uniqueName = self.decompileUniqueName(self.uniqueName)
|
|
self.nameLength = byteord(self.nameLength)
|
|
assert len(rest) == self.nameLength
|
|
self.baseGlyphName = tostr(rest)
|
|
|
|
rawMETAMD5 = self.METAMD5
|
|
self.METAMD5 = "[" + hex(byteord(self.METAMD5[0]))
|
|
for char in rawMETAMD5[1:]:
|
|
self.METAMD5 = self.METAMD5 + ", " + hex(byteord(char))
|
|
self.METAMD5 = self.METAMD5 + "]"
|
|
|
|
def decompileUniqueName(self, data):
|
|
name = ""
|
|
for char in data:
|
|
val = byteord(char)
|
|
if val == 0:
|
|
break
|
|
if (val > 31) or (val < 128):
|
|
name += chr(val)
|
|
else:
|
|
octString = oct(val)
|
|
if len(octString) > 3:
|
|
octString = octString[1:] # chop off that leading zero.
|
|
elif len(octString) < 3:
|
|
octString.zfill(3)
|
|
name += "\\" + octString
|
|
return name
|
|
|
|
def compile(self, ttFont):
|
|
d = self.__dict__.copy()
|
|
d["nameLength"] = bytechr(len(self.baseGlyphName))
|
|
d["uniqueName"] = self.compilecompileUniqueName(self.uniqueName, 28)
|
|
METAMD5List = eval(self.METAMD5)
|
|
d["METAMD5"] = b""
|
|
for val in METAMD5List:
|
|
d["METAMD5"] += bytechr(val)
|
|
assert len(d["METAMD5"]) == 16, "Failed to pack 16 byte MD5 hash in SING table"
|
|
data = sstruct.pack(SINGFormat, d)
|
|
data = data + tobytes(self.baseGlyphName)
|
|
return data
|
|
|
|
def compilecompileUniqueName(self, name, length):
|
|
nameLen = len(name)
|
|
if length <= nameLen:
|
|
name = name[: length - 1] + "\000"
|
|
else:
|
|
name += (nameLen - length) * "\000"
|
|
return name
|
|
|
|
def toXML(self, writer, ttFont):
|
|
writer.comment("Most of this table will be recalculated by the compiler")
|
|
writer.newline()
|
|
formatstring, names, fixes = sstruct.getformat(SINGFormat)
|
|
for name in names:
|
|
value = getattr(self, name)
|
|
writer.simpletag(name, value=value)
|
|
writer.newline()
|
|
writer.simpletag("baseGlyphName", value=self.baseGlyphName)
|
|
writer.newline()
|
|
|
|
def fromXML(self, name, attrs, content, ttFont):
|
|
value = attrs["value"]
|
|
if name in ["uniqueName", "METAMD5", "baseGlyphName"]:
|
|
setattr(self, name, value)
|
|
else:
|
|
setattr(self, name, safeEval(value))
|