woff2¶
-
class
fontTools.ttLib.woff2.
WOFF2DirectoryEntry
[source]¶ -
-
transformVersion
¶ Return bits 6-7 of table entry’s flags, which indicate the preprocessing transformation version number (between 0 and 3).
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transformed
¶ Return True if the table has any transformation, else return False.
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class
fontTools.ttLib.woff2.
WOFF2FlavorData
(reader=None, data=None, transformedTables=None)[source]¶ -
Flavor
= 'woff2'¶
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class
fontTools.ttLib.woff2.
WOFF2GlyfTable
(tag=None)[source]¶ Decoder/Encoder for WOFF2 ‘glyf’ table transform.
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subStreams
= ('nContourStream', 'nPointsStream', 'flagStream', 'glyphStream', 'compositeStream', 'bboxStream', 'instructionStream')¶
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class
fontTools.ttLib.woff2.
WOFF2LocaTable
(tag=None)[source]¶ Same as parent class. The only difference is that it attempts to preserve the ‘indexFormat’ as encoded in the WOFF2 glyf table.
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class
fontTools.ttLib.woff2.
WOFF2Reader
(file, checkChecksums=1, fontNumber=-1)[source]¶ -
flavor
= 'woff2'¶
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-
class
fontTools.ttLib.woff2.
WOFF2Writer
(file, numTables, sfntVersion='x00x01x00x00', flavor=None, flavorData=None)[source]¶ -
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flavor
= 'woff2'¶
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-
fontTools.ttLib.woff2.
base128Size
(n)[source]¶ Return the length in bytes of a UIntBase128-encoded sequence with value n.
>>> base128Size(0) 1 >>> base128Size(24567) 3 >>> base128Size(2**32-1) 5
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fontTools.ttLib.woff2.
compress
(input_file, output_file, transform_tables=None)[source]¶ Compress OpenType font to WOFF2.
- Args:
- input_file: a file path, file or file-like object (open in binary mode)
- containing an OpenType font (either CFF- or TrueType-flavored).
- output_file: a file path, file or file-like object where to save the
- compressed WOFF2 font.
- transform_tables: Optional[Iterable[str]]: a set of table tags for which
- to enable preprocessing transformations. By default, only ‘glyf’ and ‘loca’ tables are transformed. An empty set means disable all transformations.
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fontTools.ttLib.woff2.
decompress
(input_file, output_file)[source]¶ Decompress WOFF2 font to OpenType font.
- Args:
- input_file: a file path, file or file-like object (open in binary mode)
- containing a compressed WOFF2 font.
- output_file: a file path, file or file-like object where to save the
- decompressed OpenType font.
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fontTools.ttLib.woff2.
getKnownTagIndex
(tag)[source]¶ Return index of ‘tag’ in woff2KnownTags list. Return 63 if not found.
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fontTools.ttLib.woff2.
pack255UShort
(value)[source]¶ Encode unsigned integer in range 0 to 65535 (inclusive) to a bytestring using 255UInt16 variable-length encoding.
>>> pack255UShort(252) == b'\xfc' True >>> pack255UShort(506) == b'\xfe\x00' True >>> pack255UShort(762) == b'\xfd\x02\xfa' True
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fontTools.ttLib.woff2.
packBase128
(n)[source]¶ Encode unsigned integer in range 0 to 2**32-1 (inclusive) to a string of bytes using UIntBase128 variable-length encoding. Produce the shortest possible encoding.
>>> packBase128(63) == b"\x3f" True >>> packBase128(2**32-1) == b'\x8f\xff\xff\xff\x7f' True
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fontTools.ttLib.woff2.
unpack255UShort
(data)[source]¶ Read one to three bytes from 255UInt16-encoded input string, and return a tuple containing the decoded integer plus any leftover data.
>>> unpack255UShort(bytechr(252))[0] 252
Note that some numbers (e.g. 506) can have multiple encodings: >>> unpack255UShort(struct.pack(“BB”, 254, 0))[0] 506 >>> unpack255UShort(struct.pack(“BB”, 255, 253))[0] 506 >>> unpack255UShort(struct.pack(“BBB”, 253, 1, 250))[0] 506
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fontTools.ttLib.woff2.
unpackBase128
(data)[source]¶ Read one to five bytes from UIntBase128-encoded input string, and return a tuple containing the decoded integer plus any leftover data.
>>> unpackBase128(b'\x3f\x00\x00') == (63, b"\x00\x00") True >>> unpackBase128(b'\x8f\xff\xff\xff\x7f')[0] == 4294967295 True >>> unpackBase128(b'\x80\x80\x3f') Traceback (most recent call last): File "<stdin>", line 1, in ? TTLibError: UIntBase128 value must not start with leading zeros >>> unpackBase128(b'\x8f\xff\xff\xff\xff\x7f')[0] Traceback (most recent call last): File "<stdin>", line 1, in ? TTLibError: UIntBase128-encoded sequence is longer than 5 bytes >>> unpackBase128(b'\x90\x80\x80\x80\x00')[0] Traceback (most recent call last): File "<stdin>", line 1, in ? TTLibError: UIntBase128 value exceeds 2**32-1