[Bug 90221] Triangle boundary artifact on Shadow Warrior game

[Bug 90221] Triangle boundary artifact on Shadow Warrior game

[bugzilla-daemon]

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https://bugs.freedesktop.org/show_bug.cgi?id=90221

            Bug ID: 90221
           Summary: Triangle boundary artifact on Shadow Warrior game
           Product: Mesa
           Version: git
          Hardware: x86-64 (AMD64)
                OS: All
            Status: NEW
          Severity: normal
          Priority: medium
         Component: Drivers/Gallium/radeonsi
          Assignee: dri-devel@lists.freedesktop.org
          Reporter: lvella@gmail.com
        QA Contact: dri-devel@lists.freedesktop.org

Created attachment 115419
  --> https://bugs.freedesktop.org/attachment.cgi?id=115419&action=edit
Wall with light effect triggering the artifact.

On game Shawdow Warrior, with Southern Island chip, drivers from this PPA:
https://launchpad.net/~oibaf/+archive/ubuntu/graphics-drivers

Experienced both on Ubuntu 14.10 and, after upgrade, on Ubuntu 15.04.

Some special effects trigger a visible artifact on triangle primitive
boundaries, probably, see screenshot attached. With fglrx, the issue is not
present.

It seems the problem is on some post-processing shader, because, as can be seen
in the screenshot, the visible triangles does not respect the boundary of scene
objects, and if I move the mouse, they are fixed relative to the screen.

Running with the following env var (otherwise the game is unplayable slow on
current video settings):
R600_DEBUG=sb

Relevant info from glxinfo:
OpenGL vendor string: X.Org
OpenGL renderer string: Gallium 0.4 on AMD TAHITI
OpenGL core profile version string: 3.3 (Core Profile) Mesa 10.6.0-devel
(git-7f5a8ac 2015-04-25 utopic-oibaf-ppa)
OpenGL core profile shading language version string: 3.30
OpenGL core profile context flags: (none)

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[Bug 90221] Triangle boundary artifact on Shadow Warrior game

[bugzilla-daemon]

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https://bugs.freedesktop.org/show_bug.cgi?id=90221

Lucas <lvella@gmail.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |lvella@gmail.com
                 OS|All                         |Linux (All)

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[Bug 90221] Triangle boundary artifact on Shadow Warrior game

[bugzilla-daemon]

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https://bugs.freedesktop.org/show_bug.cgi?id=90221

Michel Dänzer <michel@daenzer.net> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
 Attachment #115419|text/plain                  |image/jpeg
          mime type|                            |

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[Bug 90221] Triangle boundary artifact on Shadow Warrior game

[bugzilla-daemon]

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https://bugs.freedesktop.org/show_bug.cgi?id=90221

--- Comment #1 from Michel Dänzer <michel@daenzer.net> ---
(In reply to Lucas from comment #0)
> Some special effects trigger a visible artifact on triangle primitive
> boundaries, probably, see screenshot attached.

Looks like bug 88642, which is fixed in current LLVM.


> Running with the following env var (otherwise the game is unplayable slow on
> current video settings):
> R600_DEBUG=sb

That environment variable has no effect with the radeonsi driver.

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[Bug 90221] Triangle boundary artifact on Shadow Warrior game

[bugzilla-daemon]

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https://bugs.freedesktop.org/show_bug.cgi?id=90221

Lucas <lvella@gmail.com> changed:

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

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