1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
|
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)
|
