Nouveau - Apr 2009 - NV40 Cubic Texture HW Mip Map Generation

Hello,
	I have been looking at cubic texture mapping for a bit, and I
	have found that hw mipmap generation doesn't work at all or
	the textures are all messed up (normal 2d work fine). This is
	with linear textures.  Also of note is that software mipmap
	generation works fine.

	I have done sanity checks for the miptree pitches, offsets, etc
	and everything seems to match up fine for both the hw and sw
	paths.  

	Any thoughts on what could be wrong?

jb17bsome

On Fri, Apr 17, 2009 at 1:59 AM, jb17bsome <jedynamic at bellsouth.net>
wrote:
> Hello,
> ? ? ? ?I have been looking at cubic texture mapping for a bit, and I
> ? ? ? ?have found that hw mipmap generation doesn't work at all or
> ? ? ? ?the textures are all messed up (normal 2d work fine). This is
> ? ? ? ?with linear textures. ?Also of note is that software mipmap
> ? ? ? ?generation works fine.
>
> ? ? ? ?I have done sanity checks for the miptree pitches, offsets, etc
> ? ? ? ?and everything seems to match up fine for both the hw and sw
> ? ? ? ?paths.
>
> ? ? ? ?Any thoughts on what could be wrong?
>
> jb17bsome
I was going to take a look, but apparently we don't have the cube_map
extensions hooked up, and I'm not sure how to do that with Mesa and
Gallium, and also there are no cube map tests in progs. Do you have a
patch and some test code? I don't know why it wouldn't work, cube maps
should work with the auto mipmap generation method they're using in
Mesa currently.