encodings: Support for OpenType-specific character encodings

Overview:

fontTools includes support for some character encodings found in legacy Mac TrueType fonts. Many of these legacy encodings have found their way into the standard Python encodings library, but others still remain unimplemented. Importing fontTools.encodings.codecs will therefore add string encode() and decode() support for the following encodings:

• x_mac_japanese_ttx

• x_mac_trad_chinese_ttx

• x_mac_korean_ttx

• x_mac_simp_chinese_ttx

fontTools also includes a module (fontTools.encodings.MacRoman) that consists of a mapping of glyph IDs to glyph names in the MacRoman character set:

>>> from fontTools.encodings.MacRoman import MacRoman
>>> MacRoman[26]
'twosuperior'

and a module (fontTools.encodings.StandardEncoding) that provides a similar mapping of glyph IDs to glyph names in the PostScript Standard Encoding.

fontTools.encodings.codecs

Extend the Python codecs module with a few encodings that are used in OpenType (name table) but missing from Python. See https://github.com/fonttools/fonttools/issues/236 for details.

class fontTools.encodings.codecs.ExtendCodec(name, base_encoding, mapping)

Bases: Codec

encode(input, errors='strict')

decode(input, errors='strict')

error(e)

fontTools.encodings.codecs.search_function(name)

fontTools.encodings.MacRoman

fontTools.encodings.StandardEncoding