/usr/lib/python2.7/dist-packages/FontTools/fontTools/ttLib/tables/_f_v_a_r.py is in fonttools 3.0-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 | from __future__ import print_function, division, absolute_import
from fontTools.misc.py23 import *
from fontTools.misc import sstruct
from fontTools.misc.fixedTools import fixedToFloat, floatToFixed
from fontTools.misc.textTools import safeEval, num2binary, binary2num
from fontTools.ttLib import TTLibError
from . import DefaultTable
import struct
# Apple's documentation of 'fvar':
# https://developer.apple.com/fonts/TrueType-Reference-Manual/RM06/Chap6fvar.html
FVAR_HEADER_FORMAT = """
> # big endian
version: L
offsetToData: H
countSizePairs: H
axisCount: H
axisSize: H
instanceCount: H
instanceSize: H
"""
FVAR_AXIS_FORMAT = """
> # big endian
axisTag: 4s
minValue: 16.16F
defaultValue: 16.16F
maxValue: 16.16F
flags: H
nameID: H
"""
FVAR_INSTANCE_FORMAT = """
> # big endian
nameID: H
flags: H
"""
class table__f_v_a_r(DefaultTable.DefaultTable):
dependencies = ["name"]
def __init__(self, tag="fvar"):
DefaultTable.DefaultTable.__init__(self, tag)
self.axes = []
self.instances = []
def compile(self, ttFont):
header = {
"version": 0x00010000,
"offsetToData": sstruct.calcsize(FVAR_HEADER_FORMAT),
"countSizePairs": 2,
"axisCount": len(self.axes),
"axisSize": sstruct.calcsize(FVAR_AXIS_FORMAT),
"instanceCount": len(self.instances),
"instanceSize": sstruct.calcsize(FVAR_INSTANCE_FORMAT) + len(self.axes) * 4
}
result = [sstruct.pack(FVAR_HEADER_FORMAT, header)]
result.extend([axis.compile() for axis in self.axes])
axisTags = [axis.axisTag for axis in self.axes]
result.extend([instance.compile(axisTags) for instance in self.instances])
return bytesjoin(result)
def decompile(self, data, ttFont):
header = {}
headerSize = sstruct.calcsize(FVAR_HEADER_FORMAT)
header = sstruct.unpack(FVAR_HEADER_FORMAT, data[0:headerSize])
if header["version"] != 0x00010000:
raise TTLibError("unsupported 'fvar' version %04x" % header["version"])
pos = header["offsetToData"]
axisSize = header["axisSize"]
for _ in range(header["axisCount"]):
axis = Axis()
axis.decompile(data[pos:pos+axisSize])
self.axes.append(axis)
pos += axisSize
instanceSize = header["instanceSize"]
axisTags = [axis.axisTag for axis in self.axes]
for _ in range(header["instanceCount"]):
instance = NamedInstance()
instance.decompile(data[pos:pos+instanceSize], axisTags)
self.instances.append(instance)
pos += instanceSize
def toXML(self, writer, ttFont, progress=None):
for axis in self.axes:
axis.toXML(writer, ttFont)
for instance in self.instances:
instance.toXML(writer, ttFont)
def fromXML(self, name, attrs, content, ttFont):
if name == "Axis":
axis = Axis()
axis.fromXML(name, attrs, content, ttFont)
self.axes.append(axis)
elif name == "NamedInstance":
instance = NamedInstance()
instance.fromXML(name, attrs, content, ttFont)
self.instances.append(instance)
class Axis(object):
def __init__(self):
self.axisTag = None
self.nameID = 0
self.flags = 0 # not exposed in XML because spec defines no values
self.minValue = -1.0
self.defaultValue = 0.0
self.maxValue = 1.0
def compile(self):
return sstruct.pack(FVAR_AXIS_FORMAT, self)
def decompile(self, data):
sstruct.unpack2(FVAR_AXIS_FORMAT, data, self)
def toXML(self, writer, ttFont):
name = ttFont["name"].getDebugName(self.nameID)
if name is not None:
writer.newline()
writer.comment(name)
writer.newline()
writer.begintag("Axis")
writer.newline()
for tag, value in [("AxisTag", self.axisTag),
("MinValue", str(self.minValue)),
("DefaultValue", str(self.defaultValue)),
("MaxValue", str(self.maxValue)),
("NameID", str(self.nameID))]:
writer.begintag(tag)
writer.write(value)
writer.endtag(tag)
writer.newline()
writer.endtag("Axis")
writer.newline()
def fromXML(self, name, _attrs, content, ttFont):
assert(name == "Axis")
for tag, _, value in filter(lambda t: type(t) is tuple, content):
value = ''.join(value)
if tag == "AxisTag":
self.axisTag = value
elif tag in ["MinValue", "DefaultValue", "MaxValue", "NameID"]:
setattr(self, tag[0].lower() + tag[1:], safeEval(value))
class NamedInstance(object):
def __init__(self):
self.nameID = 0
self.flags = 0 # not exposed in XML because spec defines no values
self.coordinates = {}
def compile(self, axisTags):
result = [sstruct.pack(FVAR_INSTANCE_FORMAT, self)]
for axis in axisTags:
fixedCoord = floatToFixed(self.coordinates[axis], 16)
result.append(struct.pack(">l", fixedCoord))
return bytesjoin(result)
def decompile(self, data, axisTags):
sstruct.unpack2(FVAR_INSTANCE_FORMAT, data, self)
pos = sstruct.calcsize(FVAR_INSTANCE_FORMAT)
for axis in axisTags:
value = struct.unpack(">l", data[pos : pos + 4])[0]
self.coordinates[axis] = fixedToFloat(value, 16)
pos += 4
def toXML(self, writer, ttFont):
name = ttFont["name"].getDebugName(self.nameID)
if name is not None:
writer.newline()
writer.comment(name)
writer.newline()
writer.begintag("NamedInstance", nameID=self.nameID)
writer.newline()
for axis in ttFont["fvar"].axes:
writer.simpletag("coord", axis=axis.axisTag,
value=self.coordinates[axis.axisTag])
writer.newline()
writer.endtag("NamedInstance")
writer.newline()
def fromXML(self, name, attrs, content, ttFont):
assert(name == "NamedInstance")
self.nameID = safeEval(attrs["nameID"])
for tag, elementAttrs, _ in filter(lambda t: type(t) is tuple, content):
if tag == "coord":
self.coordinates[elementAttrs["axis"]] = safeEval(elementAttrs["value"])
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