Ian Romanick wrote:
On Thu, Nov 07, 2002 at 09:09:06AM -0800, Ian Romanick wrote:
On Thu, Nov 07, 2002 at 07:48:55AM -0800, Ian Romanick wrote:
On Wed, Nov 06, 2002 at 11:41:00PM +0100, Dieter N�tzel wrote:
Am Mittwoch, 6. November 2002 23:23 schrieb Adam K Kirchhoff:
Hello all,
These two links show screenshots of glaxium on two separate
machines, one with an r100 (original 64 Meg Radeon) and one with an r200
(Radeon 8500).
http://memory.visualtech.com/glaxium-r100.png
http://memory.visualtech.com/glaxium-r200.png
You may notice that, quite frankly, the floor looks much nicer on
the r100 than on the r200. Can anyone explain why this would be the case?
Shouldn't the r200 support all the same extensions as the r100?
Broken textures in the r200 branch?
Have you tried with TCL disabled?
Please try both with parsec. I see some texture corruption with the r200
there, too.
I know that glaxium is, but is parsec using DOT3? If so, I believe that may
be the problem. I know that the R200 driver doesn't handle the scale factor
correctly for ARB_texture_env_dot3 (it always uses a 1x scale). However, I
don't think /that/ by itself would cause that problem. If that were the
case, then it would run unbearably slow on R100 (using a non-1x scale causes
a sw fallback on R100).
Actually, I found the bug. The R200 driver exports EXT_texture_env_dot3,
but the GL_COMBINE case in r200UpdateTextureEnv (r200_texstate.c) doesn't
have cases for the GL_DOT3_{RGB,RGBA}_EXT enums. The _EXT version *IS*
different (and has different enums) than the ARB/OpenGL 1.3 version.
Adding case-statements for the _EXT enums everywhere there's a non-EXT enum
should fix the problem, modulo the incorrect implmentation of the non-EXT
version mentioned above. There was some discussion of this a couple months
ago WRT the R100 driver.
Okay. I'm going to fix this in the texmem branch. I need somebody to
verify that the R200 has a 16x scale factor. It should be:
#define R200_TXC_SCALE_16X (4<<8)
In the spec it lists this value as 'reserved'. Try it anyway...
Keith
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