def decompile(self, data, ttFont):
# read table header
sstruct.unpack(sbixHeaderFormat, data[ : sbixHeaderFormatSize], self)
# collect offsets to individual strikes in self.strikeOffsets
for i in range(self.numStrikes):
current_offset = sbixHeaderFormatSize + i * sbixStrikeOffsetFormatSize
offset_entry = sbixStrikeOffset()
sstruct.unpack(sbixStrikeOffsetFormat, \
data[current_offset:current_offset+sbixStrikeOffsetFormatSize], \
offset_entry)
self.strikeOffsets.append(offset_entry.strikeOffset)
# decompile Strikes
for i in range(self.numStrikes-1, -1, -1):
current_strike = Strike(rawdata=data[self.strikeOffsets[i]:])
data = data[:self.strikeOffsets[i]]
current_strike.decompile(ttFont)
#print " Strike length: %xh" % len(bitmapSetData)
#print "Number of Glyph entries:", len(current_strike.glyphs)
if current_strike.ppem in self.strikes:
from fontemon_blender_addon.fontTools import ttLib
raise ttLib.TTLibError("Pixel 'ppem' must be unique for each Strike")
self.strikes[current_strike.ppem] = current_strike
# after the glyph data records have been extracted, we don't need the offsets anymore
del self.strikeOffsets
del self.numStrikes
def decompile(self, ttFont):
if self.data is None:
from fontemon_blender_addon.fontTools import ttLib
raise ttLib.TTLibError
if len(self.data) < sbixStrikeHeaderFormatSize:
from fontemon_blender_addon.fontTools import ttLib
raise(ttLib.TTLibError, "Strike header too short: Expected %x, got %x.") \
% (sbixStrikeHeaderFormatSize, len(self.data))
# read Strike header from raw data
sstruct.unpack(sbixStrikeHeaderFormat, self.data[:sbixStrikeHeaderFormatSize], self)
# calculate number of glyphs
firstGlyphDataOffset, = struct.unpack(">L", \
self.data[sbixStrikeHeaderFormatSize:sbixStrikeHeaderFormatSize + sbixGlyphDataOffsetFormatSize])
self.numGlyphs = (firstGlyphDataOffset - sbixStrikeHeaderFormatSize) // sbixGlyphDataOffsetFormatSize - 1
# ^ -1 because there's one more offset than glyphs
# build offset list for single glyph data offsets
self.glyphDataOffsets = []
for i in range(self.numGlyphs + 1): # + 1 because there's one more offset than glyphs
start = i * sbixGlyphDataOffsetFormatSize + sbixStrikeHeaderFormatSize
current_offset, = struct.unpack(">L", self.data[start:start + sbixGlyphDataOffsetFormatSize])
self.glyphDataOffsets.append(current_offset)
# iterate through offset list and slice raw data into glyph data records
for i in range(self.numGlyphs):
current_glyph = Glyph(rawdata=self.data[self.glyphDataOffsets[i]:self.glyphDataOffsets[i+1]], gid=i)
current_glyph.decompile(ttFont)
self.glyphs[current_glyph.glyphName] = current_glyph
del self.glyphDataOffsets
del self.numGlyphs
del self.data
def decompile(self, data, ttFont):
axisTags = [axis.axisTag for axis in ttFont["fvar"].axes]
glyphs = ttFont.getGlyphOrder()
sstruct.unpack(GVAR_HEADER_FORMAT, data[0:GVAR_HEADER_SIZE], self)
assert len(glyphs) == self.glyphCount
assert len(axisTags) == self.axisCount
offsets = self.decompileOffsets_(data[GVAR_HEADER_SIZE:],
tableFormat=(self.flags & 1),
glyphCount=self.glyphCount)
sharedCoords = tv.decompileSharedTuples(axisTags,
self.sharedTupleCount, data,
self.offsetToSharedTuples)
self.variations = {}
offsetToData = self.offsetToGlyphVariationData
for i in range(self.glyphCount):
glyphName = glyphs[i]
glyph = ttFont["glyf"][glyphName]
numPointsInGlyph = self.getNumPoints_(glyph)
gvarData = data[offsetToData + offsets[i]:offsetToData +
offsets[i + 1]]
try:
self.variations[glyphName] = decompileGlyph_(
numPointsInGlyph, sharedCoords, axisTags, gvarData)
except Exception:
log.error(
"Failed to decompile deltas for glyph '%s' (%d points)",
glyphName,
numPointsInGlyph,
)
raise
def decompile(self, ttFont):
self.glyphName = ttFont.getGlyphName(self.gid)
if self.rawdata is None:
from fontemon_blender_addon.fontTools import ttLib
raise ttLib.TTLibError("No table data to decompile")
if len(self.rawdata) > 0:
if len(self.rawdata) < sbixGlyphHeaderFormatSize:
from fontemon_blender_addon.fontTools import ttLib
#print "Glyph %i header too short: Expected %x, got %x." % (self.gid, sbixGlyphHeaderFormatSize, len(self.rawdata))
raise ttLib.TTLibError("Glyph header too short.")
sstruct.unpack(sbixGlyphHeaderFormat,
self.rawdata[:sbixGlyphHeaderFormatSize], self)
if self.graphicType == "dupe":
# this glyph is a reference to another glyph's image data
gid, = struct.unpack(">H",
self.rawdata[sbixGlyphHeaderFormatSize:])
self.referenceGlyphName = ttFont.getGlyphName(gid)
else:
self.imageData = self.rawdata[sbixGlyphHeaderFormatSize:]
self.referenceGlyphName = None
# clean up
del self.rawdata
del self.gid
def decompile(self, data, ttFont):
sstruct.unpack(TRAK_HEADER_FORMAT, data[:TRAK_HEADER_FORMAT_SIZE],
self)
for direction in ('horiz', 'vert'):
trackData = TrackData()
offset = getattr(self, direction + 'Offset')
if offset != 0:
trackData.decompile(data, offset)
setattr(self, direction + 'Data', trackData)
def _readHeaderAndMap(self):
self.file.seek(0)
headerData = self._read(ResourceForkHeaderSize)
sstruct.unpack(ResourceForkHeader, headerData, self)
# seek to resource map, skip reserved
mapOffset = self.mapOffset + 22
resourceMapData = self._read(ResourceMapHeaderSize, mapOffset)
sstruct.unpack(ResourceMapHeader, resourceMapData, self)
self.absTypeListOffset = self.mapOffset + self.typeListOffset
self.absNameListOffset = self.mapOffset + self.nameListOffset
def decompile(self, data, ttFont):
# Save the original data because offsets are from the start of the table.
origData = data
i = 0
dummy = sstruct.unpack(eblcHeaderFormat, data[:8], self)
i += 8
self.strikes = []
for curStrikeIndex in range(self.numSizes):
curStrike = Strike()
self.strikes.append(curStrike)
curTable = curStrike.bitmapSizeTable
dummy = sstruct.unpack2(bitmapSizeTableFormatPart1, data[i:i + 16],
curTable)
i += 16
for metric in ('hori', 'vert'):
metricObj = SbitLineMetrics()
vars(curTable)[metric] = metricObj
dummy = sstruct.unpack2(sbitLineMetricsFormat, data[i:i + 12],
metricObj)
i += 12
dummy = sstruct.unpack(bitmapSizeTableFormatPart2, data[i:i + 8],
curTable)
i += 8
for curStrike in self.strikes:
curTable = curStrike.bitmapSizeTable
for subtableIndex in range(curTable.numberOfIndexSubTables):
i = curTable.indexSubTableArrayOffset + subtableIndex * indexSubTableArraySize
tup = struct.unpack(indexSubTableArrayFormat,
data[i:i + indexSubTableArraySize])
(firstGlyphIndex, lastGlyphIndex,
additionalOffsetToIndexSubtable) = tup
i = curTable.indexSubTableArrayOffset + additionalOffsetToIndexSubtable
tup = struct.unpack(indexSubHeaderFormat,
data[i:i + indexSubHeaderSize])
(indexFormat, imageFormat, imageDataOffset) = tup
indexFormatClass = self.getIndexFormatClass(indexFormat)
indexSubTable = indexFormatClass(data[i + indexSubHeaderSize:],
ttFont)
indexSubTable.firstGlyphIndex = firstGlyphIndex
indexSubTable.lastGlyphIndex = lastGlyphIndex
indexSubTable.additionalOffsetToIndexSubtable = additionalOffsetToIndexSubtable
indexSubTable.indexFormat = indexFormat
indexSubTable.imageFormat = imageFormat
indexSubTable.imageDataOffset = imageDataOffset
indexSubTable.decompile(
) # https://github.com/fontemon_blender_addon.fontTools/fontemon_blender_addon.fontTools/issues/317
curStrike.indexSubTables.append(indexSubTable)
def decompile(self, data, ttFont, version=2.0):
if version >= 3.0:
_, data = sstruct.unpack2(Silf_part1_format_v3, data, self)
self.ruleVersion = float(
floatToFixedToStr(self.ruleVersion, precisionBits=16))
_, data = sstruct.unpack2(Silf_part1_format, data, self)
for jlevel in range(self.numJLevels):
j, data = sstruct.unpack2(Silf_justify_format, data, _Object())
self.jLevels.append(j)
_, data = sstruct.unpack2(Silf_part2_format, data, self)
if self.numCritFeatures:
self.critFeatures = struct.unpack_from(
('>%dH' % self.numCritFeatures), data)
data = data[self.numCritFeatures * 2 + 1:]
(numScriptTag, ) = struct.unpack_from('B', data)
if numScriptTag:
self.scriptTags = [
struct.unpack("4s", data[x:x + 4])[0].decode("ascii")
for x in range(1, 1 + 4 * numScriptTag, 4)
]
data = data[1 + 4 * numScriptTag:]
(self.lbGID, ) = struct.unpack('>H', data[:2])
if self.numPasses:
self.oPasses = struct.unpack(('>%dL' % (self.numPasses + 1)),
data[2:6 + 4 * self.numPasses])
data = data[6 + 4 * self.numPasses:]
(numPseudo, ) = struct.unpack(">H", data[:2])
for i in range(numPseudo):
if version >= 3.0:
pseudo = sstruct.unpack(Silf_pseudomap_format,
data[8 + 6 * i:14 + 6 * i], _Object())
else:
pseudo = sstruct.unpack(Silf_pseudomap_format_h,
data[8 + 4 * i:12 + 4 * i], _Object())
self.pMap[pseudo.unicode] = ttFont.getGlyphName(pseudo.nPseudo)
data = data[8 + 6 * numPseudo:]
currpos = (sstruct.calcsize(Silf_part1_format) +
sstruct.calcsize(Silf_justify_format) * self.numJLevels +
sstruct.calcsize(Silf_part2_format) +
2 * self.numCritFeatures + 1 + 1 + 4 * numScriptTag + 6 +
4 * self.numPasses + 8 + 6 * numPseudo)
if version >= 3.0:
currpos += sstruct.calcsize(Silf_part1_format_v3)
self.classes = Classes()
self.classes.decompile(data, ttFont, version)
for i in range(self.numPasses):
p = Pass()
self.passes.append(p)
p.decompile(
data[self.oPasses[i] - currpos:self.oPasses[i + 1] - currpos],
ttFont, version)
def readTTCHeader(file):
file.seek(0)
data = file.read(ttcHeaderSize)
if len(data) != ttcHeaderSize:
raise TTLibError("Not a Font Collection (not enough data)")
self = SimpleNamespace()
sstruct.unpack(ttcHeaderFormat, data, self)
if self.TTCTag != "ttcf":
raise TTLibError("Not a Font Collection")
assert self.Version == 0x00010000 or self.Version == 0x00020000, "unrecognized TTC version 0x%08x" % self.Version
self.offsetTable = struct.unpack(">%dL" % self.numFonts, file.read(self.numFonts * 4))
if self.Version == 0x00020000:
pass # ignoring version 2.0 signatures
return self
def decompile(self, refData, reader):
sstruct.unpack(ResourceRefItem, refData, self)
# interpret 3-byte dataOffset as (padded) ULONG to unpack it with struct
self.dataOffset, = struct.unpack('>L',
bytesjoin([b"\0", self.dataOffset]))
absDataOffset = reader.dataOffset + self.dataOffset
dataLength, = struct.unpack(">L", reader._read(4, absDataOffset))
self.data = reader._read(dataLength)
if self.nameOffset == -1:
return
absNameOffset = reader.absNameListOffset + self.nameOffset
nameLength, = struct.unpack('B', reader._read(1, absNameOffset))
name, = struct.unpack('>%ss' % nameLength, reader._read(nameLength))
self.name = tostr(name, encoding='mac-roman')
def decompile(self, data, ttFont):
sstruct.unpack(postFormat, data[:postFormatSize], self)
data = data[postFormatSize:]
if self.formatType == 1.0:
self.decode_format_1_0(data, ttFont)
elif self.formatType == 2.0:
self.decode_format_2_0(data, ttFont)
elif self.formatType == 3.0:
self.decode_format_3_0(data, ttFont)
elif self.formatType == 4.0:
self.decode_format_4_0(data, ttFont)
else:
# supported format
raise ttLib.TTLibError("'post' table format %f not supported" %
self.formatType)
def decompile(self, data, ttFont):
axisTags = [axis.axisTag for axis in ttFont["fvar"].axes]
header = {}
sstruct.unpack(CVAR_HEADER_FORMAT, data[0:CVAR_HEADER_SIZE], header)
self.majorVersion = header["majorVersion"]
self.minorVersion = header["minorVersion"]
assert self.majorVersion == 1, self.majorVersion
self.variations = decompileTupleVariationStore(
tableTag=self.tableTag,
axisTags=axisTags,
tupleVariationCount=header["tupleVariationCount"],
pointCount=len(ttFont["cvt "].values),
sharedTuples=None,
data=data,
pos=CVAR_HEADER_SIZE,
dataPos=header["offsetToData"])
def decompile(self, data, ttFont):
headerSize = sstruct.calcsize(META_HEADER_FORMAT)
header = sstruct.unpack(META_HEADER_FORMAT, data[0 : headerSize])
if header["version"] != 1:
raise TTLibError("unsupported 'meta' version %d" %
header["version"])
dataMapSize = sstruct.calcsize(DATA_MAP_FORMAT)
for i in range(header["numDataMaps"]):
dataMapOffset = headerSize + i * dataMapSize
dataMap = sstruct.unpack(
DATA_MAP_FORMAT,
data[dataMapOffset : dataMapOffset + dataMapSize])
tag = dataMap["tag"]
offset = dataMap["dataOffset"]
self.data[tag] = data[offset : offset + dataMap["dataLength"]]
if tag in ["dlng", "slng"]:
self.data[tag] = self.data[tag].decode("utf-8")
def decompile(self, data, offset):
# initial offset is from the start of trak table to the current TrackData
trackDataHeader = data[offset:offset + TRACK_DATA_FORMAT_SIZE]
if len(trackDataHeader) != TRACK_DATA_FORMAT_SIZE:
raise TTLibError('not enough data to decompile TrackData header')
sstruct.unpack(TRACK_DATA_FORMAT, trackDataHeader, self)
offset += TRACK_DATA_FORMAT_SIZE
nSizes = self.nSizes
sizeTableOffset = self.sizeTableOffset
sizeTable = []
for i in range(nSizes):
sizeValueData = data[sizeTableOffset:sizeTableOffset +
SIZE_VALUE_FORMAT_SIZE]
if len(sizeValueData) < SIZE_VALUE_FORMAT_SIZE:
raise TTLibError(
'not enough data to decompile TrackData size subtable')
sizeValue, = struct.unpack(SIZE_VALUE_FORMAT, sizeValueData)
sizeTable.append(fi2fl(sizeValue, 16))
sizeTableOffset += SIZE_VALUE_FORMAT_SIZE
for i in range(self.nTracks):
entry = TrackTableEntry()
entryData = data[offset:offset + TRACK_TABLE_ENTRY_FORMAT_SIZE]
if len(entryData) < TRACK_TABLE_ENTRY_FORMAT_SIZE:
raise TTLibError(
'not enough data to decompile TrackTableEntry record')
sstruct.unpack(TRACK_TABLE_ENTRY_FORMAT, entryData, entry)
perSizeOffset = entry.offset
for j in range(nSizes):
size = sizeTable[j]
perSizeValueData = data[perSizeOffset:perSizeOffset +
PER_SIZE_VALUE_FORMAT_SIZE]
if len(perSizeValueData) < PER_SIZE_VALUE_FORMAT_SIZE:
raise TTLibError(
'not enough data to decompile per-size track values')
perSizeValue, = struct.unpack(PER_SIZE_VALUE_FORMAT,
perSizeValueData)
entry[size] = perSizeValue
perSizeOffset += PER_SIZE_VALUE_FORMAT_SIZE
self[entry.track] = entry
offset += TRACK_TABLE_ENTRY_FORMAT_SIZE
def _readTypeList(self):
absTypeListOffset = self.absTypeListOffset
numTypesData = self._read(2, absTypeListOffset)
self.numTypes, = struct.unpack('>H', numTypesData)
absTypeListOffset2 = absTypeListOffset + 2
for i in range(self.numTypes + 1):
resTypeItemOffset = absTypeListOffset2 + ResourceTypeItemSize * i
resTypeItemData = self._read(ResourceTypeItemSize,
resTypeItemOffset)
item = sstruct.unpack(ResourceTypeItem, resTypeItemData)
resType = tostr(item['type'], encoding='mac-roman')
refListOffset = absTypeListOffset + item['refListOffset']
numRes = item['numRes'] + 1
resources = self._readReferenceList(resType, refListOffset, numRes)
self._resources[resType] = resources
def decompile(self, data, ttFont):
axisTags = [axis.axisTag for axis in ttFont["fvar"].axes]
header = {}
headerSize = sstruct.calcsize(AVAR_HEADER_FORMAT)
header = sstruct.unpack(AVAR_HEADER_FORMAT, data[0:headerSize])
majorVersion = header["majorVersion"]
if majorVersion != 1:
raise TTLibError("unsupported 'avar' version %d" % majorVersion)
pos = headerSize
for axis in axisTags:
segments = self.segments[axis] = {}
numPairs = struct.unpack(">H", data[pos:pos+2])[0]
pos = pos + 2
for _ in range(numPairs):
fromValue, toValue = struct.unpack(">hh", data[pos:pos+4])
segments[fi2fl(fromValue, 14)] = fi2fl(toValue, 14)
pos = pos + 4
def decompile(self, data, ttFont):
dummy, data = sstruct.unpack2(OS2_format_0, data, self)
if self.version == 1:
dummy, data = sstruct.unpack2(OS2_format_1_addition, data, self)
elif self.version in (2, 3, 4):
dummy, data = sstruct.unpack2(OS2_format_2_addition, data, self)
elif self.version == 5:
dummy, data = sstruct.unpack2(OS2_format_5_addition, data, self)
self.usLowerOpticalPointSize /= 20
self.usUpperOpticalPointSize /= 20
elif self.version != 0:
from fontemon_blender_addon.fontTools import ttLib
raise ttLib.TTLibError("unknown format for OS/2 table: version %s" % self.version)
if len(data):
log.warning("too much 'OS/2' table data")
self.panose = sstruct.unpack(panoseFormat, self.panose, Panose())
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 __init__(self, file, checkChecksums=0, fontNumber=-1):
self.file = file
self.checkChecksums = checkChecksums
self.flavor = None
self.flavorData = None
self.DirectoryEntry = SFNTDirectoryEntry
self.file.seek(0)
self.sfntVersion = self.file.read(4)
self.file.seek(0)
if self.sfntVersion == b"ttcf":
header = readTTCHeader(self.file)
numFonts = header.numFonts
if not 0 <= fontNumber < numFonts:
raise TTLibError("specify a font number between 0 and %d (inclusive)" % (numFonts - 1))
self.numFonts = numFonts
self.file.seek(header.offsetTable[fontNumber])
data = self.file.read(sfntDirectorySize)
if len(data) != sfntDirectorySize:
raise TTLibError("Not a Font Collection (not enough data)")
sstruct.unpack(sfntDirectoryFormat, data, self)
elif self.sfntVersion == b"wOFF":
self.flavor = "woff"
self.DirectoryEntry = WOFFDirectoryEntry
data = self.file.read(woffDirectorySize)
if len(data) != woffDirectorySize:
raise TTLibError("Not a WOFF font (not enough data)")
sstruct.unpack(woffDirectoryFormat, data, self)
else:
data = self.file.read(sfntDirectorySize)
if len(data) != sfntDirectorySize:
raise TTLibError("Not a TrueType or OpenType font (not enough data)")
sstruct.unpack(sfntDirectoryFormat, data, self)
self.sfntVersion = Tag(self.sfntVersion)
if self.sfntVersion not in ("\x00\x01\x00\x00", "OTTO", "true"):
raise TTLibError("Not a TrueType or OpenType font (bad sfntVersion)")
tables = {}
for i in range(self.numTables):
entry = self.DirectoryEntry()
entry.fromFile(self.file)
tag = Tag(entry.tag)
tables[tag] = entry
self.tables = OrderedDict(sorted(tables.items(), key=lambda i: i[1].offset))
# Load flavor data if any
if self.flavor == "woff":
self.flavorData = WOFFFlavorData(self)
def decompile(self, data, ttFont):
sstruct.unpack(hheaFormat, data, self)
def fromFile(self, file): sstruct.unpack(self.format, file.read(self.formatSize), self)
def fromString(self, str): sstruct.unpack(self.format, str, self)
