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# FreeType-2.4.12 API Reference

# CID Fonts

## Synopsis

| FT_Get_CID_Registry_Ordering_Supplement
| FT_Get_CID_Is_Internally_CID_Keyed
| FT_Get_CID_From_Glyph_Index

This section contains the declaration of CID-keyed font specific functions.

#### FT_Get_CID_Registry_Ordering_Supplement
Defined in FT_CID_H (freetype/ftcid.h).
      FT_EXPORT( FT_Error )
      FT_Get_CID_Registry_Ordering_Supplement( FT_Face       face,
                                               const char*  *registry,
                                               const char*  *ordering,
                                               FT_Int       *supplement);
Retrieve the Registry/Ordering/Supplement triple (also known as the "R/O/S") from a CID-keyed font.
input
face | A handle to the input face.
output
registry | The registry, as a C string, owned by the face.
ordering | The ordering, as a C string, owned by the face.
supplement | The supplement.
return
FreeType error code. 0 means success.
note
This function only works with CID faces, returning an error otherwise.
since
2.3.6

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#### FT_Get_CID_Is_Internally_CID_Keyed
Defined in FT_CID_H (freetype/ftcid.h).
      FT_EXPORT( FT_Error )
      FT_Get_CID_Is_Internally_CID_Keyed( FT_Face   face,
                                          FT_Bool  *is_cid );
Retrieve the type of the input face, CID keyed or not. In constrast to the FT_IS_CID_KEYED macro this function returns successfully also for CID-keyed fonts in an SNFT wrapper.
input
face | A handle to the input face.
output
is_cid | The type of the face as an FT_Bool.
return
FreeType error code. 0 means success.
note
This function only works with CID faces and OpenType fonts, returning an error otherwise.
since
2.3.9

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#### FT_Get_CID_From_Glyph_Index
Defined in FT_CID_H (freetype/ftcid.h).
      FT_EXPORT( FT_Error )
      FT_Get_CID_From_Glyph_Index( FT_Face   face,
                                   FT_UInt   glyph_index,
                                   FT_UInt  *cid );
Retrieve the CID of the input glyph index.
input
face | A handle to the input face.
glyph_index | The input glyph index.
output
cid | The CID as an FT_UInt.
return
FreeType error code. 0 means success.
note
This function only works with CID faces and OpenType fonts, returning an error otherwise.
since
2.3.9

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