Bug 28994 - [r300c] [r300g] skybox in ut2004 is not seamless
Summary: [r300c] [r300g] skybox in ut2004 is not seamless
Status: RESOLVED NOTOURBUG
Alias: None
Product: Mesa
Classification: Unclassified
Component: Drivers/Gallium/r300 (show other bugs)
Version: git
Hardware: x86 (IA32) All
: medium normal
Assignee: Default DRI bug account
QA Contact:
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Depends on:
Blocks:
 
Reported: 2010-07-09 13:07 UTC by almos
Modified: 2010-12-22 07:27 UTC (History)
0 users

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Attachments
sky (131.25 KB, image/jpeg)
2010-07-09 13:07 UTC, almos
Details

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Description almos 2010-07-09 13:07:01 UTC
As the attached screenshot shows, the polygon onto which the sky is rendered has sharp contours, which should not be visible at all.
Comment 1 almos 2010-07-09 13:07:44 UTC
Created attachment 36928 [details]
sky
Comment 2 Jon Sturm 2010-07-10 08:07:05 UTC
This is also noticeable on my 2 rv730 cards so it seems to be a mesa or radeon bug in general and not r300 specific.
Comment 3 Tom Stellard 2010-10-29 17:30:22 UTC
Is this still an issue in Mesa 7.9 or the latest version from git?
Comment 4 almos 2010-10-30 07:16:24 UTC
The problem still exists. Tested with latest version from git.
Comment 5 Marek Olšák 2010-12-17 05:50:14 UTC
The skybox looks fine here, absolutely seamless.
Comment 6 Marek Olšák 2010-12-17 09:34:00 UTC
Closing as it works for me.
Comment 7 almos 2010-12-17 10:49:58 UTC
You were a bit hasty (less than 4 hours between the question and the bug close?). Here it still looks exactly like on the attached screenshot. I also checked it with softpipe, and that looks same as well.

BTW I found absolutely no docs about how to change the driver to softpipe from r300g. After hours of googling the only clue I found was 'LIBGL_ALWAYS_SOFTWARE=1' in a comment on a phoronix forum.
Comment 8 Marek Olšák 2010-12-17 11:32:44 UTC
(In reply to comment #7)
> You were a bit hasty (less than 4 hours between the question and the bug
> close?). Here it still looks exactly like on the attached screenshot. I also
> checked it with softpipe, and that looks same as well.

I wonder why the skybox renders correctly only on r5xx...

> 
> BTW I found absolutely no docs about how to change the driver to softpipe from
> r300g. After hours of googling the only clue I found was
> 'LIBGL_ALWAYS_SOFTWARE=1' in a comment on a phoronix forum.

Create an empty directory, add a swrast_dri.so symlink there that points to swrastg_dri.so or whatever driver you need. Set LIBGL_DRIVERS_PATH for it to contain the path to that directory. Every 3D application will then look for $LIBGL_DRIVERS_PATH/r300_dri.so, which wouldn't be there. Then it will look for $LIBGL_DRIVERS_PATH/swrast_dri.so and load it.

To get r300g:
LIBGL_DRIVERS_PATH=/home/..../mesa/lib/gallium glxinfo

To get r300c:
LIBGL_DRIVERS_PATH=/home/..../mesa/lib glxinfo

To get swrast:
ln -s /home/..../mesa/lib/swrast_dri.so /some-path/swrast_dri.so
LIBGL_DRIVERS_PATH=/some-path glxinfo

To get llvmpipe (assumming you build with --enable-gallium-llvm):
ln -s /home/..../mesa/lib/gallium/swrastg_dri.so /some-path/swrast_dri.so
LIBGL_DRIVERS_PATH=/some-path glxinfo

To get softpipe (assumming you build with --enable-gallium-llvm):
ln -s /home/..../mesa/lib/gallium/swrastg_dri.so /some-path/swrast_dri.so
LIBGL_DRIVERS_PATH=/some-path GALLIUM_DRIVER=softpipe glxinfo

Or you may use LIBGL_ALWAYS_SOFTWARE, but I don't use that.
Comment 9 almos 2010-12-17 13:21:36 UTC
(In reply to comment #8)
> I wonder why the skybox renders correctly only on r5xx...

Maybe you set world detail=low, which removes the clouds (and the visible skybox)...

> 
> > 
> > BTW I found absolutely no docs about how to change the driver to softpipe from
> > r300g. After hours of googling the only clue I found was
> > 'LIBGL_ALWAYS_SOFTWARE=1' in a comment on a phoronix forum.
> 
> Create an empty directory, add a swrast_dri.so symlink there that points to
> swrastg_dri.so or whatever driver you need. Set LIBGL_DRIVERS_PATH for it to
> contain the path to that directory. Every 3D application will then look for
> $LIBGL_DRIVERS_PATH/r300_dri.so, which wouldn't be there. Then it will look for
> $LIBGL_DRIVERS_PATH/swrast_dri.so and load it.
> 
> .....
Neat trick. Should be added to a readme or fd.o wiki.
Comment 10 Marek Olšák 2010-12-17 13:31:22 UTC
(In reply to comment #9)
> (In reply to comment #8)
> > I wonder why the skybox renders correctly only on r5xx...
> 
> Maybe you set world detail=low, which removes the clouds (and the visible
> skybox)...

I have "world detail" set to high.
Comment 11 almos 2010-12-17 14:15:16 UTC
(In reply to comment #10)
> (In reply to comment #9)
> > (In reply to comment #8)
> > > I wonder why the skybox renders correctly only on r5xx...
> > 
> > Maybe you set world detail=low, which removes the clouds (and the visible
> > skybox)...
> 
> I have "world detail" set to high.

I'm out of ideas then. What's the situation on i965 or nouveau or r600g?
Comment 12 almos 2010-12-21 12:41:58 UTC
> I wonder why the skybox renders correctly only on r5xx...

I found out what the possible difference is between our setups: you are running it with UseVBO=False, and I'm running it with UseVBO=True in the UT2004.ini. The former renders the sky correctly, the latter renders much faster.
Comment 13 almos 2010-12-22 07:27:54 UTC
Today I had the chance to try it on a geforce fx5200 with the blob driver, and the skybox is visible on the torlan level with usevbo=true; thus, it is a bug in the game. Sorry for the false alarm.


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