[prev in list] [next in list] [prev in thread] [next in thread] 

List:       kde-user
Subject:    Re: [SLE] XFree86 Problem - "A" solution
From:       "Akar th'  'orrible" <akar () optusnet ! com ! au>
Date:       2001-08-24 13:55:31
[Download RAW message or body]

On Fri, 24 Aug 2001 22:55, Stephen P. Molnar, Ph.D. wrote:
> Any insights/proper solutions will be most appreciated.

I do believe that is the first time that you mentioned that achieving 
1600x1200 was only a problem with OpenGL.  :-)

I think you may find a rather microcosmic cause AND solution for the 
problem. The thing is that calculating video memory is quite easy for a 2D 
display:
You take the cubed value of X * Y pixels to the nth power of Z  and 
multiple it by (dpi) squared / (sq rt of (-1). (Well actually its just 
x*y*bpp/8 bytes) and you sometimes have to multiply this by 2 for double 
buffering etc etc
With an OpenGL 3D display the actual resolution memory is insignificant 
compared to the memory required for other things such as textures etc and 
all the sorts of neat tricks that GL does. The very first thing I did with 
your problem was calculate that their was sufficient memory (only a few 
megs in 2D mode)

Now it doesn't actually matter I dont think if you dont even USE much of 
the texture memory, I dont think it is dynamically allocated. When you 
start a display in 3D mode at 1600x1200 the driver assumes that you are 
about to play Quake and allocates accordingly. The driver sits there and 
processes and comes up with: "Who is this guy kidding? We can't do 
blood-curdling special effects and realistic dismemberment at 1600x1200x24 
with only 32Meg of video mem". "Tell the bastard, NO WAY HOS'E and chuck a 
segfault while you're at it"

In other words more memory (video mem that is) will almost certainly fix 
your problem.

Andrew.
 
-- 
Send posts to:  kde-user@lists.netcentral.net
 Send all commands to:  kde-user-request@lists.netcentral.net
  Put your command in the SUBJECT of the message:
   "subscribe", "unsubscribe", "set digest on", or "set digest off"

All kde mailing lists are archived at http://lists.kde.org
**********************************************************************
This list is from your pals at NetCentral <http://www.netcentral.com/>

[prev in list] [next in list] [prev in thread] [next in thread]