def compileActions(font, states):
result, actions, actionIndex = b"", set(), {}
for state in states:
for _glyphClass, trans in state.Transitions.items():
actions.add(trans.compileLigActions())
# Sort the compiled actions in decreasing order of
# length, so that the longer sequence come before the
# shorter ones. For each compiled action ABCD, its
# suffixes BCD, CD, and D do not be encoded separately
# (in case they occur); instead, we can just store an
# index that points into the middle of the longer
# sequence. Every compiled AAT ligature sequence is
# terminated with an end-of-sequence flag, which can
# only be set on the last element of the sequence.
# Therefore, it is sufficient to consider just the
# suffixes.
for a in sorted(actions, key=lambda x:(-len(x), x)):
if a not in actionIndex:
for i in range(0, len(a), 4):
suffix = a[i:]
suffixIndex = (len(result) + i) // 4
actionIndex.setdefault(
suffix, suffixIndex)
result += a
result = pad(result, 4)
return (result, actionIndex)
def compileActions(font, states):
result, actions, actionIndex = b"", set(), {}
for state in states:
for _glyphClass, trans in state.Transitions.items():
actions.add(trans.compileLigActions())
# Sort the compiled actions in decreasing order of
# length, so that the longer sequence come before the
# shorter ones. For each compiled action ABCD, its
# suffixes BCD, CD, and D do not be encoded separately
# (in case they occur); instead, we can just store an
# index that points into the middle of the longer
# sequence. Every compiled AAT ligature sequence is
# terminated with an end-of-sequence flag, which can
# only be set on the last element of the sequence.
# Therefore, it is sufficient to consider just the
# suffixes.
for a in sorted(actions, key=lambda x:(-len(x), x)):
if a not in actionIndex:
for i in range(0, len(a), 4):
suffix = a[i:]
suffixIndex = (len(result) + i) // 4
actionIndex.setdefault(
suffix, suffixIndex)
result += a
result = pad(result, 4)
return (result, actionIndex)
def setMacCreatorAndType(path, fileCreator, fileType):
if xattr is not None:
from fontTools.misc.textTools import pad
if not all(len(s) == 4 for s in (fileCreator, fileType)):
raise TypeError('arg must be string of 4 chars')
finderInfo = pad(bytesjoin([fileType, fileCreator]), 32)
xattr.setxattr(path, 'com.apple.FinderInfo', finderInfo)
if MacOS is not None:
MacOS.SetCreatorAndType(path, fileCreator, fileType)
def setMacCreatorAndType(path, fileCreator, fileType):
if xattr is not None:
from fontTools.misc.textTools import pad
if not all(len(s) == 4 for s in (fileCreator, fileType)):
raise TypeError('arg must be string of 4 chars')
finderInfo = pad(bytesjoin([fileType, fileCreator]), 32)
xattr.setxattr(path, 'com.apple.FinderInfo', finderInfo)
if MacOS is not None:
MacOS.SetCreatorAndType(path, fileCreator, fileType)
def _writeFlavorData(self):
"""Write metadata and/or private data using appropiate padding."""
compressedMetaData = self.compressedMetaData
privData = self.flavorData.privData
if compressedMetaData and privData:
compressedMetaData = pad(compressedMetaData, size=4)
if compressedMetaData:
self.file.seek(self.metaOffset)
assert self.file.tell() == self.metaOffset
self.file.write(compressedMetaData)
if privData:
self.file.seek(self.privOffset)
assert self.file.tell() == self.privOffset
self.file.write(privData)
def _writeFlavorData(self): """Write metadata and/or private data using appropiate padding.""" compressedMetaData = self.compressedMetaData privData = self.flavorData.privData if compressedMetaData and privData: compressedMetaData = pad(compressedMetaData, size=4) if compressedMetaData: self.file.seek(self.metaOffset) assert self.file.tell() == self.metaOffset self.file.write(compressedMetaData) if privData: self.file.seek(self.privOffset) assert self.file.tell() == self.privOffset self.file.write(privData)
def close(self):
""" All tags must have been specified. Now write the table data and directory.
"""
if len(self.tables) != self.numTables:
raise TTLibError("wrong number of tables; expected %d, found %d" % (self.numTables, len(self.tables)))
if self.sfntVersion in ("\x00\x01\x00\x00", "true"):
isTrueType = True
elif self.sfntVersion == "OTTO":
isTrueType = False
else:
raise TTLibError("Not a TrueType or OpenType font (bad sfntVersion)")
# The WOFF2 spec no longer requires the glyph offsets to be 4-byte aligned.
# However, the reference WOFF2 implementation still fails to reconstruct
# 'unpadded' glyf tables, therefore we need to 'normalise' them.
# See:
# https://github.com/khaledhosny/ots/issues/60
# https://github.com/google/woff2/issues/15
if (
isTrueType
and "glyf" in self.flavorData.transformedTables
and "glyf" in self.tables
):
self._normaliseGlyfAndLoca(padding=4)
self._setHeadTransformFlag()
# To pass the legacy OpenType Sanitiser currently included in browsers,
# we must sort the table directory and data alphabetically by tag.
# See:
# https://github.com/google/woff2/pull/3
# https://lists.w3.org/Archives/Public/public-webfonts-wg/2015Mar/0000.html
# TODO(user): remove to match spec once browsers are on newer OTS
self.tables = OrderedDict(sorted(self.tables.items()))
self.totalSfntSize = self._calcSFNTChecksumsLengthsAndOffsets()
fontData = self._transformTables()
compressedFont = brotli.compress(fontData, mode=brotli.MODE_FONT)
self.totalCompressedSize = len(compressedFont)
self.length = self._calcTotalSize()
self.majorVersion, self.minorVersion = self._getVersion()
self.reserved = 0
directory = self._packTableDirectory()
self.file.seek(0)
self.file.write(pad(directory + compressedFont, size=4))
self._writeFlavorData()
def close(self):
""" All tags must have been specified. Now write the table data and directory.
"""
if len(self.tables) != self.numTables:
raise TTLibError("wrong number of tables; expected %d, found %d" % (self.numTables, len(self.tables)))
if self.sfntVersion in ("\x00\x01\x00\x00", "true"):
isTrueType = True
elif self.sfntVersion == "OTTO":
isTrueType = False
else:
raise TTLibError("Not a TrueType or OpenType font (bad sfntVersion)")
# The WOFF2 spec no longer requires the glyph offsets to be 4-byte aligned.
# However, the reference WOFF2 implementation still fails to reconstruct
# 'unpadded' glyf tables, therefore we need to 'normalise' them.
# See:
# https://github.com/khaledhosny/ots/issues/60
# https://github.com/google/woff2/issues/15
if isTrueType:
self._normaliseGlyfAndLoca(padding=4)
self._setHeadTransformFlag()
# To pass the legacy OpenType Sanitiser currently included in browsers,
# we must sort the table directory and data alphabetically by tag.
# See:
# https://github.com/google/woff2/pull/3
# https://lists.w3.org/Archives/Public/public-webfonts-wg/2015Mar/0000.html
# TODO(user): remove to match spec once browsers are on newer OTS
self.tables = OrderedDict(sorted(self.tables.items()))
self.totalSfntSize = self._calcSFNTChecksumsLengthsAndOffsets()
fontData = self._transformTables()
compressedFont = brotli.compress(fontData, mode=brotli.MODE_FONT)
self.totalCompressedSize = len(compressedFont)
self.length = self._calcTotalSize()
self.majorVersion, self.minorVersion = self._getVersion()
self.reserved = 0
directory = self._packTableDirectory()
self.file.seek(0)
self.file.write(pad(directory + compressedFont, size=4))
self._writeFlavorData()
def compile(self, ttFont): if not hasattr(self, "glyphOrder"): self.glyphOrder = ttFont.getGlyphOrder() padding = self.padding assert padding in (0, 1, 2, 4) locations = [] currentLocation = 0 dataList = [] recalcBBoxes = ttFont.recalcBBoxes for glyphName in self.glyphOrder: glyph = self.glyphs[glyphName] glyphData = glyph.compile(self, recalcBBoxes) if padding > 1: glyphData = pad(glyphData, size=padding) locations.append(currentLocation) currentLocation = currentLocation + len(glyphData) dataList.append(glyphData) locations.append(currentLocation) if padding == 1 and currentLocation < 0x20000: # See if we can pad any odd-lengthed glyphs to allow loca # table to use the short offsets. indices = [i for i,glyphData in enumerate(dataList) if len(glyphData) % 2 == 1] if indices and currentLocation + len(indices) < 0x20000: # It fits. Do it. for i in indices: dataList[i] += b'\0' currentLocation = 0 for i,glyphData in enumerate(dataList): locations[i] = currentLocation currentLocation += len(glyphData) locations[len(dataList)] = currentLocation data = b''.join(dataList) if 'loca' in ttFont: ttFont['loca'].set(locations) if 'maxp' in ttFont: ttFont['maxp'].numGlyphs = len(self.glyphs) if not data: # As a special case when all glyph in the font are empty, add a zero byte # to the table, so that OTS doesn’t reject it, and to make the table work # on Windows as well. # See https://github.com/khaledhosny/ots/issues/52 data = b"\0" return data
def setMacCreatorAndType(path, fileCreator, fileType):
"""Set file creator and file type codes for a path.
Note that if the ``xattr`` module is not installed, no action is
taken but no error is raised.
Args:
path (str): A file path.
fileCreator: A four-character file creator tag.
fileType: A four-character file type tag.
"""
if xattr is not None:
from fontTools.misc.textTools import pad
if not all(len(s) == 4 for s in (fileCreator, fileType)):
raise TypeError('arg must be string of 4 chars')
finderInfo = pad(bytesjoin([fileType, fileCreator]), 32)
xattr.setxattr(path, 'com.apple.FinderInfo', finderInfo)
def compile(self, ttFont):
if not hasattr(self, "glyphOrder"):
self.glyphOrder = ttFont.getGlyphOrder()
padding = self.padding
assert padding in (0, 1, 2, 4)
locations = []
currentLocation = 0
dataList = []
recalcBBoxes = ttFont.recalcBBoxes
for glyphName in self.glyphOrder:
glyph = self.glyphs[glyphName]
glyphData = glyph.compile(self, recalcBBoxes)
if padding > 1:
glyphData = pad(glyphData, size=padding)
locations.append(currentLocation)
currentLocation = currentLocation + len(glyphData)
dataList.append(glyphData)
locations.append(currentLocation)
if padding == 1 and currentLocation < 0x20000:
# See if we can pad any odd-lengthed glyphs to allow loca
# table to use the short offsets.
indices = [
i for i, glyphData in enumerate(dataList)
if len(glyphData) % 2 == 1
]
if indices and currentLocation + len(indices) < 0x20000:
# It fits. Do it.
for i in indices:
dataList[i] += b'\0'
currentLocation = 0
for i, glyphData in enumerate(dataList):
locations[i] = currentLocation
currentLocation += len(glyphData)
locations[len(dataList)] = currentLocation
data = bytesjoin(dataList)
if 'loca' in ttFont:
ttFont['loca'].set(locations)
if 'maxp' in ttFont:
ttFont['maxp'].numGlyphs = len(self.glyphs)
return data
def compile(self, ttFont): if not hasattr(self, "glyphOrder"): self.glyphOrder = ttFont.getGlyphOrder() padding = self.padding assert padding in (0, 1, 2, 4) locations = [] currentLocation = 0 dataList = [] recalcBBoxes = ttFont.recalcBBoxes for glyphName in self.glyphOrder: glyph = self.glyphs[glyphName] glyphData = glyph.compile(self, recalcBBoxes) if padding > 1: glyphData = pad(glyphData, size=padding) locations.append(currentLocation) currentLocation = currentLocation + len(glyphData) dataList.append(glyphData) locations.append(currentLocation) if padding == 1 and currentLocation < 0x20000: # See if we can pad any odd-lengthed glyphs to allow loca # table to use the short offsets. indices = [i for i,glyphData in enumerate(dataList) if len(glyphData) % 2 == 1] if indices and currentLocation + len(indices) < 0x20000: # It fits. Do it. for i in indices: dataList[i] += b'\0' currentLocation = 0 for i,glyphData in enumerate(dataList): locations[i] = currentLocation currentLocation += len(glyphData) locations[len(dataList)] = currentLocation data = bytesjoin(dataList) if 'loca' in ttFont: ttFont['loca'].set(locations) if 'maxp' in ttFont: ttFont['maxp'].numGlyphs = len(self.glyphs) return data
def test_pad():
assert len(pad(b'abcd', 4)) == 4
assert len(pad(b'abcde', 2)) == 6
assert len(pad(b'abcde', 4)) == 8
assert pad(b'abcdef', 4) == b'abcdef\x00\x00'
assert pad(b'abcdef', 1) == b'abcdef'
def test_pad():
assert len(pad(b'abcd', 4)) == 4
assert len(pad(b'abcde', 2)) == 6
assert len(pad(b'abcde', 4)) == 8
assert pad(b'abcdef', 4) == b'abcdef\x00\x00'
assert pad(b'abcdef', 1) == b'abcdef'
