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# coding: utf-8
from .otBase import BaseTTXConverter
class table__c_i_d_g(BaseTTXConverter):
"""The AAT ``cidg`` table has almost the same structure as ``gidc``,
just mapping CIDs to GlyphIDs instead of the reverse direction.
It is useful for fonts that may be used by a PDF renderer in lieu of
a font reference with a known glyph collection but no subsetted
glyphs. For instance, a PDF can say “please use a font conforming
to Adobe-Japan-1”; the ``cidg`` mapping is necessary if the font is,
say, a TrueType font. ``gidc`` is lossy for this purpose and is
obsoleted by ``cidg``.
For example, the first font in ``/System/Library/Fonts/PingFang.ttc``
(which Apple ships pre-installed on MacOS 10.12.6) has a ``cidg`` table.
"""
pass
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