Re: [Dri-devel] Smoother graphics with 16bpp on radeon

[Felix <fx...@gm...>]

On Mon, 02 Dec 2002 10:47:54 +0000
Keith Whitwell <ke...@tu...> wrote:

> Felix Kühling wrote:
> > Hi,
> > 
> > I made two small modifications to the radeon driver to make OpenGL look
> > much nicer with 16bpp. The first thing is to enable dithering, the
> > second is to use 32bpp textures even in 16bpp mode, if the application
> > requests them. A patch is attached.
> 
> I've turned it on unilaterally, for 16 and 32 bit.  This is consistent with 
> the enable/disable code in radeon_state.c
> 
> > Maybe the texture color depth should be handled more intelligently in
> > 16bpp mode, based on the amount of graphics memory or controlled by an
> > environment variable?
> 
> I think I'd want to see this sort of thing put in place, rather than the patch 
>   you posted which would increase the amount of texture memory required for 
> some apps without giving the user a chance to counter that.

Exactly. I figured that there was probably a good reason to use 16bit
textures. And I think it also affects the frame rate due to higher
memory bandwidth demands. So if we agree on this, I would make this
controlled by an environment variable. What should be the default
setting?

Felix

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