1eea246a_k_glide_docs2_3_1_GLIDEPGM_DOC__alpha_source
[Glide constant] GR_LFBWRITEMODE_565_DEPTH [color source] incoming pixel [depth source] incoming pixel [alpha source] 
constant alpha2
c o n s t a n t a l p h a 2
i n c o m i n g p i x e l
/home/usr/bk/glide/docs2.3.1/GLIDEPGM.DOC
alpha source