[Bug 80015] New: Transparency glitches in native Civilization 5 (Civ5) port

[Bug 80015] New: Transparency glitches in native Civilization 5 (Civ5) port

[bugzilla-daemon]

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https://bugs.freedesktop.org/show_bug.cgi?id=80015

          Priority: medium
            Bug ID: 80015
          Assignee: dri-devel@lists.freedesktop.org
           Summary: Transparency glitches in native Civilization 5 (Civ5)
                    port
          Severity: normal
    Classification: Unclassified
                OS: Linux (All)
          Reporter: mikelnx@hmamail.com
          Hardware: x86-64 (AMD64)
            Status: NEW
           Version: git
         Component: Drivers/Gallium/radeonsi
           Product: Mesa

This report has been constructed from details from the reddit thread at

http://www.reddit.com/r/linux_gaming/comments/28199a/steams_opengl_version_info_misleading_for_aspyrs/

-----

Broken transparency in Civ5 (see http://i.imgur.com/z4mFZXE.jpg)

 - around oil resources
 - around the lighthouse beams
 - floodlight shining on active unit
 - smoke rising from pillaged tiles and barbarian camps

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lspci -v | grep VGA and glxinfo | grep OpenGL output:

01:00.0 VGA compatible controller: Advanced Micro Devices, Inc. [AMD/ATI]
Pitcairn XT [Radeon HD 7870 GHz Edition]

OpenGL vendor string: X.Org
OpenGL renderer string: Gallium 0.4 on AMD PITCAIRN
OpenGL core profile version string: 3.3 (Core Profile) Mesa 10.3.0-devel
(git-0d89448 trusty-oibaf-ppa)
OpenGL core profile shading language version string: 3.30
OpenGL core profile context flags: (none)
OpenGL core profile profile mask: core profile
OpenGL core profile extensions:
OpenGL version string: 3.0 Mesa 10.3.0-devel (git-0d89448 trusty-oibaf-ppa)
OpenGL shading language version string: 1.30

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[Bug 80015] Transparency glitches in native Civilization 5 (Civ5) port

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https://bugs.freedesktop.org/show_bug.cgi?id=80015

mikelnx@hmamail.com changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                URL|                            |http://www.reddit.com/r/lin
                   |                            |ux_gaming/comments/28199a/s
                   |                            |teams_opengl_version_info_m
                   |                            |isleading_for_aspyrs/

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[Bug 80015] Transparency glitches in native Civilization 5 (Civ5) port

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https://bugs.freedesktop.org/show_bug.cgi?id=80015

--- Comment #1 from smoki <smoki00790@gmail.com> ---
Created attachment 101079
  --> https://bugs.freedesktop.org/attachment.cgi?id=101079&action=edit
CivV.png


 Confirming this, happens on Radeon 8400 too.

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[Bug 80015] Transparency glitches in native Civilization 5 (Civ5) port

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https://bugs.freedesktop.org/show_bug.cgi?id=80015

--- Comment #2 from Vadim Girlin <ptpzz@yandex.ru> ---
Created attachment 101111
  --> https://bugs.freedesktop.org/attachment.cgi?id=101111&action=edit
patch

It seems the game relies on specific behavior of inversesqrt, which is
undefined when x <= 0 according to GLSL spec. The attached patch uses
V_RSQ_CLAMP_F32 instead of V_RSQ_LEGACY_F32 for int_AMDGPU_rsq, this fixed the
issue for me.

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[Bug 80015] Transparency glitches in native Civilization 5 (Civ5) port

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https://bugs.freedesktop.org/show_bug.cgi?id=80015

Paulo Dias <paulo.miguel.dias@gmail.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |paulo.miguel.dias@gmail.com

--- Comment #3 from Paulo Dias <paulo.miguel.dias@gmail.com> ---
*** Bug 80071 has been marked as a duplicate of this bug. ***

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[Bug 80015] Transparency glitches in native Civilization 5 (Civ5) port

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https://bugs.freedesktop.org/show_bug.cgi?id=80015

--- Comment #4 from smoki <smoki00790@gmail.com> ---
(In reply to comment #2)
> Created attachment 101111 [details] [review]
> patch
> 
> It seems the game relies on specific behavior of inversesqrt, which is
> undefined when x <= 0 according to GLSL spec. The attached patch uses
> V_RSQ_CLAMP_F32 instead of V_RSQ_LEGACY_F32 for int_AMDGPU_rsq, this fixed
> the issue for me.


 Thanks Vadim, that fixed it for me too :).

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[Bug 80015] Transparency glitches in native Civilization 5 (Civ5) port

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https://bugs.freedesktop.org/show_bug.cgi?id=80015

--- Comment #5 from Alex Deucher <agd5f@yahoo.com> ---
http://lists.freedesktop.org/archives/mesa-dev/2014-June/062167.html

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[Bug 80015] Transparency glitches in native Civilization 5 (Civ5) port

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https://bugs.freedesktop.org/show_bug.cgi?id=80015

--- Comment #6 from Rafael Castillo <jrch2k10@gmail.com> ---
confirmed fix too when running Civ5 in wine

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[Bug 80015] Transparency glitches in native Civilization 5 (Civ5) port

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https://bugs.freedesktop.org/show_bug.cgi?id=80015

Tom Stellard <tstellar@gmail.com> changed:

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

--- Comment #7 from Tom Stellard <tstellar@gmail.com> ---
Fixed in Mesa:  b9f501bc6bc52c25bef86a24b49fda4e92fcd924

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[Bug 80015] Transparency glitches in native Civilization 5 (Civ5) port

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https://bugs.freedesktop.org/show_bug.cgi?id=80015

tuxicoman <debian@jesuislibre.net> changed:

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

--- Comment #8 from tuxicoman <debian@jesuislibre.net> ---
I have the same withe glitch on Civ5 shown on the CivV.png with AMD radeonsi
open source driver.
I don't have the problem with Intel open source drivers.
I use Debian Jessie with mesa 10.2.6

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[Bug 80015] Transparency glitches in native Civilization 5 (Civ5) port

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https://bugs.freedesktop.org/show_bug.cgi?id=80015

--- Comment #9 from smoki <smoki00790@gmail.com> ---
(In reply to comment #8)
> I have the same withe glitch on Civ5 shown on the CivV.png with AMD radeonsi
> open source driver.
> I don't have the problem with Intel open source drivers.
> I use Debian Jessie with mesa 10.2.6

 Fix is there for upstream 10.2 but it only aplay if mesa is bulded against
llvm 3.5, Debian Jessie version is currently builded against llvm-3.4. 

 So i think you can request that on Debian bugzilla.

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[Bug 80015] Transparency glitches in native Civilization 5 (Civ5) port

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https://bugs.freedesktop.org/show_bug.cgi?id=80015

smoki <smoki00790@gmail.com> changed:

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

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