[cairo] Embedding TTF

[ecir hana]

Hello,

just a silly question, I'm reading PDF spec and there it says:

If the TrueType font program is embedded, the Type 2 CIDFont
dictionary must contain a CIDToGIDMap entry that maps CIDs to the
glyph indices for the appropriate glyph descriptions in that font
program.

But I cannot find "CIDToGIDMap" in
"_cairo_pdf_surface_emit_truetype_font_subset" in
"cairo-pdf-surface.c".

Is there a reason for that? Am I missing something?