import DefaultTable
import struct
from fontTools.misc.textTools import safeEval
GASP_SYMMETRIC_GRIDFIT = 0x0008
GASP_SYMMETRIC_SMOOTHING = 0x0004
GASP_DOGRAY = 0x0002
GASP_GRIDFIT = 0x0001
class table__g_a_s_p(DefaultTable.DefaultTable):
def decompile(self, data, ttFont):
self.version, numRanges = struct.unpack(">HH", data[:4])
assert 0 <= self.version <= 1, "unknown 'gasp' format: %s" % self.version
data = data[4:]
self.gaspRange = {}
for i in range(numRanges):
rangeMaxPPEM, rangeGaspBehavior = struct.unpack(">HH", data[:4])
self.gaspRange[int(rangeMaxPPEM)] = int(rangeGaspBehavior)
data = data[4:]
assert not data, "too much data"
def compile(self, ttFont):
version = 0 # ignore self.version
numRanges = len(self.gaspRange)
data = ""
items = self.gaspRange.items()
items.sort()
for rangeMaxPPEM, rangeGaspBehavior in items:
data = data + struct.pack(">HH", rangeMaxPPEM, rangeGaspBehavior)
if rangeGaspBehavior & ~(GASP_GRIDFIT | GASP_DOGRAY):
version = 1
data = struct.pack(">HH", version, numRanges) + data
return data
def toXML(self, writer, ttFont):
items = self.gaspRange.items()
items.sort()
for rangeMaxPPEM, rangeGaspBehavior in items:
writer.simpletag("gaspRange", [
("rangeMaxPPEM", rangeMaxPPEM),
("rangeGaspBehavior", rangeGaspBehavior)])
writer.newline()
def fromXML(self, (name, attrs, content), ttFont):
if name <> "gaspRange":
return
if not hasattr(self, "gaspRange"):
self.gaspRange = {}
self.gaspRange[safeEval(attrs["rangeMaxPPEM"])] = safeEval(attrs["rangeGaspBehavior"])
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