[Bug 91998] Object rendered completely black in The Book of Unwritten Tales: The Critter Chronicles - bugzilla-daemon

From: bugzilla-daemon@freedesktop.org
To: dri-devel@lists.freedesktop.org
Subject: [Bug 91998] Object rendered completely black in The Book of Unwritten Tales: The Critter Chronicles
Date: Mon, 14 Sep 2015 06:22:57 +0000	[thread overview]
Message-ID: <bug-91998-502@http.bugs.freedesktop.org/> (raw)

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https://bugs.freedesktop.org/show_bug.cgi?id=91998

            Bug ID: 91998
           Summary: Object rendered completely black in The Book of
                    Unwritten Tales: The Critter Chronicles
           Product: Mesa
           Version: git
          Hardware: Other
                OS: All
            Status: NEW
          Severity: minor
          Priority: medium
         Component: Drivers/Gallium/radeonsi
          Assignee: dri-devel@lists.freedesktop.org
          Reporter: daniel@constexpr.org
        QA Contact: dri-devel@lists.freedesktop.org

apitrace: http://constexpr.org/tmp/BOUT-CC-radeonsi.1.trace.xz (95 MiB)

The pipe behind the character is rendered completely black. The object is
rendered without any shader but with fixed-function lighting enabled.

Relevant draw call: 2336877 (in frame 1699)

Disabling GL_LIGHTING, GL_LIGHT3 or setting the GL_DIFFUSE material to [0, 0,
0, 0] (including alpha) causes the pipe to be rendered correctly. Disabling the
other lights has no effect.

The GL_EMISSION material is set to [1, 1, 1, 1] for this draw call so the other
lighting parameters should have no effect (unless they result in NaNs or
negative values).

GPU; Radeon HD 7950 (TAHITI)
Mesa 11.1.0-devel (git-0337a9b)
LLVM r247497
Linux 4.2.0-gentoo-r1

Everything is rendered correctly with llvmpipe.

So far I have only found one object in the game affected by this.

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