Fetches the math kerning (cut-ins) value for the specified font, glyph index, and
kern.
If the MathKern table is found, the function examines it to find a height
value that is greater or equal to correction_height. If such a height
value is found, corresponding kerning value from the table is returned. If
no such height value is found, the last kerning value is returned.
Fetches the math kerning (cut-ins) value for the specified font, glyph index, and kern.
If the MathKern table is found, the function examines it to find a height value that is greater or equal to correction_height. If such a height value is found, corresponding kerning value from the table is returned. If no such height value is found, the last kerning value is returned.