L_T_S_H_.py :  » GUI » TTX-FontTools » fonttools-2.3 » Lib » fontTools » ttLib » tables » Python Open Source

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Python Open Source » GUI » TTX FontTools 
TTX FontTools » fonttools 2.3 » Lib » fontTools » ttLib » tables » L_T_S_H_.py
import DefaultTable
import array
import struct
from fontTools.misc.textTools import safeEval

# XXX I've lowered the strictness, to make sure Apple's own Chicago
# XXX gets through. They're looking into it, I hope to raise the standards
# XXX back to normal eventually.

class table_L_T_S_H_(DefaultTable.DefaultTable):
  
  def decompile(self, data, ttFont):
    version, numGlyphs = struct.unpack(">HH", data[:4])
    data = data[4:]
    assert version == 0, "unknown version: %s" % version
    assert (len(data) % numGlyphs) < 4, "numGlyphs doesn't match data length"
    # ouch: the assertion is not true in Chicago!
    #assert numGlyphs == ttFont['maxp'].numGlyphs
    yPels = array.array("B")
    yPels.fromstring(data)
    self.yPels = {}
    for i in range(numGlyphs):
      self.yPels[ttFont.getGlyphName(i)] = yPels[i]
  
  def compile(self, ttFont):
    version = 0
    names = self.yPels.keys()
    numGlyphs = len(names)
    yPels = [0] * numGlyphs
    # ouch: the assertion is not true in Chicago!
    #assert len(self.yPels) == ttFont['maxp'].numGlyphs == numGlyphs
    for name in names:
      yPels[ttFont.getGlyphID(name)] = self.yPels[name]
    yPels = array.array("B", yPels)
    return struct.pack(">HH", version, numGlyphs) + yPels.tostring()
  
  def toXML(self, writer, ttFont):
    names = self.yPels.keys()
    names.sort()
    for name in names:
      writer.simpletag("yPel", name=name, value=self.yPels[name])
      writer.newline()
  
  def fromXML(self, (name, attrs, content), ttFont):
    if not hasattr(self, "yPels"):
      self.yPels = {}
    if name <> "yPel":
      return # ignore unknown tags
    self.yPels[attrs["name"]] = safeEval(attrs["value"])

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