[lkml]   [2001]   [May]   [18]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
Messages in this thread
SubjectRe: problem: reading from (rivafb) framebuffer is really slow

> 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.

To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to
More majordomo info at
Please read the FAQ at

 \ /
  Last update: 2005-03-22 12:53    [W:0.038 / U:0.276 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site