Re: [AD] improvements on alpha blending...

[Bob <ohannessian@xxxxxxxxxx>]

Javier González wrote:

> Basically yes, but I think 3 lookups + 3 bits shift per pixel
> is always faster than 6 multiplications, 3 substractions, 3 bit shifts and 6
> divisions
> using decimals per pixel :)


The trans blender uses 1 division (Which can be changed to a bit shift), 
1 multiplication, 1 substraction, and 1 addition per pixel (on top of 
the shifts to extract and recombine the components).

--
- Robert J Ohannessian
"Microsoft code is probably O(n^20)" (my CS prof)
http://pages.infinit.net/voidstar/