Blending images

[Bob Drebin]

In article <76041 at bu.edu.bu.edu>, tjh at bucrf11.bu.edu (Tim Hall) writes:
|> When doing a "rectcopy" are the alpha values copied along with the
|> RGB values?  If so, is compositing done if the "blendfunction" has
|> been specified?  Just curious.....
|> 
|> -- 
|> -Tim Hall
|> tjh at bu-pub.bu.edu
|> 
|> The night is filled with the cries of dispossessed children in search
|> of paradise.  -Dead Can Dance

Yes alpha values are copied during rectcopies, and the source rectangle
is combined with the destination rectangle using the current blendfunction
or logic-op.