lkml.org 
[lkml]   [2001]   [Oct]   [4]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: specific optimizations for unaccelerated framebuffers


--On Thursday, 04 October, 2001 4:28 PM +0200 Etienne Lorrain
<etienne_lorrain@yahoo.fr> wrote:

>> Since anything less than 75Hz gives me headaches, how do you propose to
>> make this work?
>
> Because there is still memory on the video board, the display stay
> at whatever refresh the video board is set up, 80 Hz if you want.

A long time ago (tm) I used this approach successfully. It
involved using an (onboard) display controller with a limited
dotclock doing large resolution high bpp displays (but at
10 to 20 Hz), capturing the digital output in offboard Video
RAM, and displaying it at 90Hz. You get some slight artefacts
but in general worked well. And here I was copying the
whole screen each time. If you only copy changed areas,
you'd ge much better results.

--
Alex Bligh
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/

\
 
 \ /
  Last update: 2005-03-22 13:04    [W:0.081 / U:0.184 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site