Fetches the #hb_glyph_extents_t data for a glyph ID in the specified font.
#hb_font_t to work upon
The glyph ID to query
The #hb_glyph_extents_t retrieved
true if data found, false otherwise
Fetches the #hb_glyph_extents_t data for a glyph ID in the specified font.