FreeType: How do I calculate baseline position?

[Pedriana, Paul]

I cannot figure out where to place the baseline 
from the FreeType documentation. Once I know 
where to place the baseline, it is simple enough 
to calculate where to blit the character and where 
to advance the pen.

If you want to write a text editor, you need to know the 
distance from the top of the full character cell down
to the baseline (shown as "???" below). I cannot find
out how to figure out this value from the FreeType
documentation. It certainly is not equal to the Y bearing
of any character, and it certainly isn't equal to the 
ascender for the character (since Y bearing is often
greater than the ascender).

So how do I find out what it is? While I'm at it, I can't 
figure out how to know what the cell height is either.
Maybe it is face->size->metrics.height, but I wouldn't
know from the documentation.

----------------------------------  -|
                                     |
                                     |
         *         -|                |
        * *         |                |
       *   *        |                | ???
      *     *       |Y Bearing       |
     *********      |                |
    *         *     |                |
   *           *    |                |
 +*             *  -|               -|


-------------------------------------

+   => Current pen position at baseline.
??? => Unknown distance that I need to know.