Re: problem: reading from (rivafb) framebuffer is really slow

[James Simmons]

> When benchmarking DirectFB, I found that a typical software alpha
> blending rectangle fill is completely dominated (I'm talking 90% of the
> CPU cycles here) by the time it takes to read pixels from the
> framebuffer.

Note the SOFTWARE alpha blending rectangle fill. You are passing alot of
data over the bus. So slooooooooow. If you implement a accelerated
function you will not have this problem.