Font datum enumeration

Const Values Description
TL_DATUM 0 Top left (default)
TC_DATUM 1 Top centre
TR_DATUM 2 Top right
ML_DATUM 3 Middle left
CL_DATUM 3 Centre left, same as above
MC_DATUM 4 Middle centre
CC_DATUM 4 Centre centre, same as above
MR_DATUM 5 Middle right
CR_DATUM 5 Centre right, same as above
BL_DATUM 6 Bottom left
BC_DATUM 7 Bottom centre
BR_DATUM 8 Bottom right
L_BASELINE 9 Left character baseline
(Line the 'A' character would sit on)
C_BASELINE 10 Centre character baseline
R_BASELINE 11 Right character baseline