def makeBitwiseIdenticalNonStandardTable1():
header, directory, tableData = defaultSFNTTestData()
# adjust the header
header["numTables"] += 1
# store the data
data = "\0" * 4
tableData["TEST"] = data
# offset the directory entries
for entry in directory:
entry["offset"] += sfntDirectoryEntrySize
# find the offset
entries = [(entry["offset"], entry) for entry in directory]
entry = max(entries)[1]
offset = entry["offset"] + entry["length"]
offset += calcPaddingLength(offset)
# make the entry
directory.append(
dict(
tag="TEST",
offset=offset,
length=4,
checksum=calcTableChecksum("TEST", data)
)
)
# compile
data = packSFNT(header, directory, tableData)
return data
def makeInvalidPadding2():
header, directory, tableData = defaultSFNTTestData()
# pad the tables and update their offsets
entries = [(entry["offset"], entry) for entry in directory]
for o, entry in sorted(entries):
tag = entry["tag"]
data = tableData[tag]
tableData[tag] = padData(data)
entry["offset"] += sfntDirectoryEntrySize
# make a bogus table and insert it
header["numTables"] += 1
data = "\01" * 15
tableData["zzzz"] = data
offset = entry["offset"] + entry["length"] + calcPaddingLength(entry["length"])
directory.append(
dict(
tag="zzzz",
offset=offset,
length=15,
checksum=calcTableChecksum("zzzz", data)
)
)
# compile
data = packSFNT(header, directory, tableData, applyPadding=False)
return data
def makeTableDirectoryAscending1():
header, directory, tableData = defaultSFNTTestData()
# adjust the header
header["numTables"] += len(dummyTables)
# adjust the offsets
shift = len(dummyTables) * sfntDirectoryEntrySize
for entry in directory:
entry["offset"] += shift
# store the data
sorter = [(entry["offset"], entry["length"]) for entry in directory]
offset, length = max(sorter)
offset = offset + length
data = "\0" * 4
checksum = calcTableChecksum(None, data)
for tag in dummyTables:
tableData[tag] = data
entry = dict(
tag=tag,
offset=offset,
length=4,
checksum=checksum
)
directory.append(entry)
offset += 4
# compile
data = packSFNT(header, directory, tableData)
return data
def makeUnknownTables():
from testCaseGeneratorLib.woff import knownTableTags
header, directory, tableData = defaultSFNTTestData(flavor="TTF")
# adjust the header
header["numTables"] += len(dummyTables)
# adjust the offsets
shift = len(dummyTables) * sfntDirectoryEntrySize
for entry in directory:
entry["offset"] += shift
# store the data
sorter = [(entry["offset"], entry["length"]) for entry in directory]
offset, length = max(sorter)
offset = offset + length
data = "\0" * 4
checksum = calcTableChecksum(None, data)
for tag in dummyTables:
tableData[tag] = data
entry = dict(
tag=tag,
offset=offset,
length=4,
checksum=checksum
)
directory.append(entry)
offset += 4
tags = [e["tag"] for e in directory]
assert not set(tags) < set(knownTableTags)
data = packSFNT(header, directory, tableData, flavor="TTF")
return data
def makeDSIG(flavor="CFF"):
header, directory, tableData = defaultSFNTTestData(flavor=flavor)
# adjust the header
header["numTables"] += 1
# store the data
data = "\0" * 4
tableData["DSIG"] = data
# offset the directory entries
for entry in directory:
entry["offset"] += sfntDirectoryEntrySize
# find the offset
entries = [(entry["offset"], entry) for entry in directory]
entry = max(entries)[1]
offset = entry["offset"] + entry["length"]
offset += calcPaddingLength(offset)
# make the entry
directory.append(
dict(
tag="DSIG",
offset=offset,
length=4,
checksum=calcTableChecksum("DSIG", data)
)
)
# compile
data = packSFNT(header, directory, tableData, flavor=flavor)
return data
def makeTableDirectoryAscending1():
header, directory, tableData = defaultSFNTTestData()
# adjust the header
header["numTables"] += len(dummyTables)
# adjust the offsets
shift = len(dummyTables) * sfntDirectoryEntrySize
for entry in directory:
entry["offset"] += shift
# store the data
sorter = [(entry["offset"], entry["length"]) for entry in directory]
offset, length = max(sorter)
offset = offset + length
data = "\0" * 4
checksum = calcTableChecksum(None, data)
for tag in dummyTables:
tableData[tag] = data
entry = dict(tag=tag, offset=offset, length=4, checksum=checksum)
directory.append(entry)
offset += 4
# compile
data = packSFNT(header, directory, tableData)
return data
def makeInvalidPadding2():
header, directory, tableData = defaultSFNTTestData()
# pad the tables and update their offsets
entries = [(entry["offset"], entry) for entry in directory]
for o, entry in sorted(entries):
tag = entry["tag"]
data = tableData[tag]
tableData[tag] = padData(data)
entry["offset"] += sfntDirectoryEntrySize
# make a bogus table and insert it
header["numTables"] += 1
data = "\01" * 15
tableData["zzzz"] = data
offset = entry["offset"] + entry["length"] + calcPaddingLength(
entry["length"])
directory.append(
dict(tag="zzzz",
offset=offset,
length=15,
checksum=calcTableChecksum("zzzz", data)))
# compile
data = packSFNT(header, directory, tableData, applyPadding=False)
return data
def makeBitwiseIdenticalNonStandardTable1():
header, directory, tableData = defaultSFNTTestData()
# adjust the header
header["numTables"] += 1
# store the data
data = "\0" * 4
tableData["TEST"] = data
# offset the directory entries
for entry in directory:
entry["offset"] += sfntDirectoryEntrySize
# find the offset
entries = [(entry["offset"], entry) for entry in directory]
entry = max(entries)[1]
offset = entry["offset"] + entry["length"]
offset += calcPaddingLength(offset)
# make the entry
directory.append(
dict(tag="TEST",
offset=offset,
length=4,
checksum=calcTableChecksum("TEST", data)))
# compile
data = packSFNT(header, directory, tableData)
return data
