Fetches a list of all color layers for the specified glyph index in the specified face. The list returned will begin at the offset provided.
#hb_face_t to work upon
The glyph index to query
offset of the first layer to retrieve
The array of layers found
Total number of layers available for the glyph index queried
Fetches a list of all color layers for the specified glyph index in the specified face. The list returned will begin at the offset provided.