| from fontTools.misc import sstruct |
| from fontTools.misc.textTools import safeEval |
| from . import DefaultTable |
| import array |
| import sys |
| |
| |
| Gloc_header = """ |
| > # big endian |
| version: 16.16F # Table version |
| flags: H # bit 0: 1=long format, 0=short format |
| # bit 1: 1=attribute names, 0=no names |
| numAttribs: H # NUmber of attributes |
| """ |
| |
| |
| class table_G__l_o_c(DefaultTable.DefaultTable): |
| """ |
| Support Graphite Gloc tables |
| """ |
| |
| dependencies = ["Glat"] |
| |
| def __init__(self, tag=None): |
| DefaultTable.DefaultTable.__init__(self, tag) |
| self.attribIds = None |
| self.numAttribs = 0 |
| |
| def decompile(self, data, ttFont): |
| _, data = sstruct.unpack2(Gloc_header, data, self) |
| flags = self.flags |
| del self.flags |
| self.locations = array.array("I" if flags & 1 else "H") |
| self.locations.frombytes(data[: len(data) - self.numAttribs * (flags & 2)]) |
| if sys.byteorder != "big": |
| self.locations.byteswap() |
| self.attribIds = array.array("H") |
| if flags & 2: |
| self.attribIds.frombytes(data[-self.numAttribs * 2 :]) |
| if sys.byteorder != "big": |
| self.attribIds.byteswap() |
| |
| def compile(self, ttFont): |
| data = sstruct.pack( |
| Gloc_header, |
| dict( |
| version=1.0, |
| flags=(bool(self.attribIds) << 1) + (self.locations.typecode == "I"), |
| numAttribs=self.numAttribs, |
| ), |
| ) |
| if sys.byteorder != "big": |
| self.locations.byteswap() |
| data += self.locations.tobytes() |
| if sys.byteorder != "big": |
| self.locations.byteswap() |
| if self.attribIds: |
| if sys.byteorder != "big": |
| self.attribIds.byteswap() |
| data += self.attribIds.tobytes() |
| if sys.byteorder != "big": |
| self.attribIds.byteswap() |
| return data |
| |
| def set(self, locations): |
| long_format = max(locations) >= 65536 |
| self.locations = array.array("I" if long_format else "H", locations) |
| |
| def toXML(self, writer, ttFont): |
| writer.simpletag("attributes", number=self.numAttribs) |
| writer.newline() |
| |
| def fromXML(self, name, attrs, content, ttFont): |
| if name == "attributes": |
| self.numAttribs = int(safeEval(attrs["number"])) |
| |
| def __getitem__(self, index): |
| return self.locations[index] |
| |
| def __len__(self): |
| return len(self.locations) |
| |
| def __iter__(self): |
| return iter(self.locations) |
