[Jitblit] GLSL shader for OVER operation (version 1)

[Daniel Amelang]

On 3/23/07, Bert Freudenberg <bert at freudenbergs.de> wrote:
>
> That would assume source is not pre-multiplied - why?

Good catch; it is pre-multiplied. I'll fix the shader later.

> Also, I'm pretty sure you could write src_pixel.a which is simpler
> and might be more efficient.

Good point. I looked this up in the orange book, and it looks like
they are semantically equivalent, but I do like your "src_pixel.a"
better. Better shader style, methinks.

It's good to have you on board, Bert! Thanks for the help.

Dan Amelang