https://bugs.freedesktop.org/show_bug.cgi?id=93300
Bug ID: 93300
Summary: Two Worlds 2 renders water incorrectly
Product: Mesa
Version: git
Hardware: Other
OS: All
Status: NEW
Keywords: regression
Severity: normal
Priority: medium
Component: Drivers/DRI/nouveau
Assignee: [email protected]
Reporter: [email protected]
QA Contact: [email protected]
CC: [email protected]
Created attachment 120416
--> https://bugs.freedesktop.org/attachment.cgi?id=120416&action=edit
screenshot
In Two Worlds 2 (running in Wine 1.8-rc3) water is not rendered properly: it
looks as if textures are "split up" into several pieces, as it can be seen in
the attached screenshot.
The problem doesn't occur with the software renderer (LIBGL_ALWAYS_SOFTWARE=1).
Disabling optimizations doesn't help (NV50_PROG_OPTIMIZE=0).
According to my testing the problem was introduced by
commit abd326e81b06f58797be94bd655ee06b17a34f0c
Author: Ilia Mirkin <[email protected]>
Date: Fri Dec 4 15:21:11 2015 -0500
nv50/ir: propagate indirect loads into instructions
This way $r1 = $r0 + 4; c1[$r1] becomes c1[$r0+4].
On SM35:
total instructions in shared programs : 6206257 -> 6185058 (-0.34%)
total gprs used in shared programs : 911045 -> 910722 (-0.04%)
total local used in shared programs : 39072 -> 39072 (0.00%)
local gpr inst bytes
helped 0 417 4195 4195
hurt 0 280 0 0
Reverting the commit on current Mesa git resolves the problem here.
Apitrace log (uncompressed 150 MB):
https://drive.google.com/open?id=0B-tTbLKBl-tOQ0xNMFJlSS00S1E
The trace replays correctly on Nvidia binary drivers 340.96.
Fedora 23 32-bit
Kernel 4.4.0-rc4
X Server 1.18.0
OpenGL vendor string: nouveau
OpenGL renderer string: Gallium 0.4 on NV92
OpenGL core profile version string: 3.3 (Core Profile) Mesa 11.2.0-devel
(git-f61ceeb)
OpenGL core profile shading language version string: 3.30
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