Re: [Dri-devel] ati rage 128 mobility (ibook2)

[Mccary B. <mc...@ne...>]

Michel Dänzer <mi...@da...> said:

> On Fre, 2002-02-01 at 09:56, Mccary Brady wrote:
> > is there a specific reason why some of the rendering routines are
performed in
> > software for the ati rage 128 mobility? when xscreensaver loads a gl
screen
> > hack on my ibook2, it definitely looks sluggish ... and i want fast gl
screen
> > hacks!
> 
> Beware that the xscreensaver hacks have a delay between frames, use
> -delay 0 to disable it. The ultimate test to see if there's hardware
> acceleration is the glxgears framerate. :)

ok, ill be sure to try this when im finished with classes tonite. im not sure
this is the problem though. for example, my intel box w/ a geforce2 has very
nice screen hacks w/o the -delay 0 tweaking.

also, quoting http://www.xfree86.org/4.2.0/DRI10.html#42
<quote>
10.4.3. Performance and Features

While PCI Rage 128 based cards are supported, they do not yet support PCI
GART, so they will not perform as well as their AGP counterparts.

For AGP cards, the AGP mode may be set to 1, 2, or 4. One is used by default.
Higher AGP speeds may result in unreliable performance depending on your
motherboard.

Note that even at 32bpp there is no alpha channel.

The following OpenGL features are implemented in software and will be slow: 

       accumulation buffer operations 
       stencil, when using a 16bpp screen 
       Blend subtract, min/max and logic op blend modes 
       GL_SEPARATE_SPECULAR_COLOR lighting mode 
       glDrawBuffer(GL_FRONT_AND_BACK) 
       Using 1D or 3D textures 
       Using texture borders 
</quote>

this and various other references seem to indicate that this software
rendering is a substantial bottleneck.

> 
> > i guess what im really asking, is can i configure my system in such a way
that
> > i get hardware accelleration,
> 
> Yes.
ok, let me refine the question - can i get hardware acceleration (3d) that
would make the gears (and other gl apps) run quick and smooth.

> 
> 
> -- 
> Earthling Michel Dänzer (MrCooper)/ Debian GNU/Linux (powerpc) developer
> XFree86 and DRI project member   /  CS student, Free Software enthusiast
> 
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-- 


-brady