[Bug 33142] New: r300g produces black textures in nexuiz with glsl offsetmapping on

[Bug 33142] New: r300g produces black textures in nexuiz with glsl offsetmapping on

[bugzilla-daemon]

https://bugs.freedesktop.org/show_bug.cgi?id=33142

           Summary: r300g produces black textures in nexuiz with glsl
                    offsetmapping on
           Product: DRI
           Version: XOrg CVS
          Platform: x86-64 (AMD64)
        OS/Version: Linux (All)
            Status: NEW
          Severity: normal
          Priority: medium
         Component: DRM/Radeon
        AssignedTo: dri-devel@lists.freedesktop.org
        ReportedBy: kontrollator@gmx.de


When i run stock phoronix test suite nexuiz i get black textures. I found that
this is caused by using th effects-high.cfg. when i swith to effects-normal all
textures look as they should. i found that this is caused by glsl_offsetmapping
set to 1 (aka enabled). when i change it to 0 everything is okay, when i change
it to 1 all textures are black. System is an rv410 (x700 mobility), latest mesa
/ drm / kernel from git as of today. i filed this bug against  drm, if it is
more likely a mesa problem feel free to reassign it. if you need more info
please tell me. thank you for your time.

greetings jan kreuzer

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[Bug 33142] r300g produces black textures in nexuiz with glsl offsetmapping on

[bugzilla-daemon]

https://bugs.freedesktop.org/show_bug.cgi?id=33142

Marek Olšák <maraeo@gmail.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
            Product|DRI                         |Mesa
            Version|XOrg CVS                    |unspecified
          Component|DRM/Radeon                  |Drivers/Gallium/r300

--- Comment #1 from Marek Olšák <maraeo@gmail.com> 2011-01-15 02:42:00 PST ---
I believe it's the issue with texture indirections we had before. The
conclusion was that it's a hardware limitation that we can't overcome. I don't
remember the exact details but I'll wait for Tom if he has anything to say.

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[Bug 33142] r300g produces black textures in nexuiz with glsl offsetmapping on

[bugzilla-daemon]

https://bugs.freedesktop.org/show_bug.cgi?id=33142

Tom Stellard <tstellar@gmail.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |RESOLVED
         Resolution|                            |INVALID

--- Comment #2 from Tom Stellard <tstellar@gmail.com> 2011-01-18 14:44:47 PST ---
This is the same as bug 31013.  When offsetmapping is turned on, it creates too
many texture indirections, which your hardware can't handle.  If you look in
the test logs from Phoronix Test Suite, you should see an error message like
this: "Too many texture indirections"

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