Fetches the advance for a glyph ID from the specified font, in a text segment of the specified direction.
Calls the appropriate direction-specific variant (horizontal or vertical) depending on the value of direction.
#hb_font_t to work upon
The glyph ID to query
The direction of the text segment
The horizontal advance retrieved
The vertical advance retrieved
Fetches the advance for a glyph ID from the specified font, in a text segment of the specified direction.
Calls the appropriate direction-specific variant (horizontal or vertical) depending on the value of direction.