[Bug 44696] New: Rendering glitch in ShaderToy Nautilus demo with Mesa 7.11 Gallium 0.4 AMD RV710

[Bug 44696] New: Rendering glitch in ShaderToy Nautilus demo with Mesa 7.11 Gallium 0.4 AMD RV710

[bugzilla-daemon]

https://bugs.freedesktop.org/show_bug.cgi?id=44696

             Bug #: 44696
           Summary: Rendering glitch in ShaderToy Nautilus demo with Mesa
                    7.11 Gallium 0.4 AMD RV710
    Classification: Unclassified
           Product: Mesa
           Version: unspecified
          Platform: Other
        OS/Version: All
            Status: NEW
          Severity: normal
          Priority: medium
         Component: Drivers/Gallium/r600
        AssignedTo: dri-devel@lists.freedesktop.org
        ReportedBy: bjacob@mozilla.com


Created attachment 55460
  --> https://bugs.freedesktop.org/attachment.cgi?id=55460
capture of the canvas, showing the rendering bug

My setup: Ubuntu 11.10 x86_64, Mesa 7.11, Gallium 0.4 on AMD RV710.

Steps to reproduce: in Firefox (I'm on Firefox 12 / Nightly but that shouldn't
matter):

1. Go to this URL:
   http://www.iquilezles.org/apps/shadertoy/
2. in the 'Presets' drop-down, select Nautilus
3. click 'Load'

Expected result: the blueish surface should look smooth

Actual result: rendering is littered with small dark square-ish spots that move
continuously with the animation.

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[Bug 44696] Rendering glitch in ShaderToy Nautilus demo with Mesa 7.11 Gallium 0.4 AMD RV710

[bugzilla-daemon]

https://bugs.freedesktop.org/show_bug.cgi?id=44696

--- Comment #1 from Andreas Boll <andreas.boll.dev@gmail.com> 2012-09-10 11:36:32 UTC ---
Created attachment 66920
  --> https://bugs.freedesktop.org/attachment.cgi?id=66920
capture of the canvas, showing the rendering bug is gone

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[Bug 44696] Rendering glitch in ShaderToy Nautilus demo with Mesa 7.11 Gallium 0.4 AMD RV710

[bugzilla-daemon]

https://bugs.freedesktop.org/show_bug.cgi?id=44696

Andreas Boll <andreas.boll.dev@gmail.com> changed:

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

--- Comment #2 from Andreas Boll <andreas.boll.dev@gmail.com> 2012-09-10 11:42:37 UTC ---
As you can see in attachment 66920
the rendering is fine on current firefox nightly 20120910
and current mesa 9.1-devel (git-e81ee67)

WebGL Renderer: X.Org -- Gallium 0.4 on AMD RV770 -- 2.1 Mesa 9.1-devel
(git-e81ee67)

Additionally I have tested it with mesa 8.0.4
With current mesa stable the rendering bug is also gone.

So I'm closing this bug.
Feel free to reopen if the rendering issues persist for you.

btw:
The demo is a little bit laggy.
radeontop shows that the demo is gpu bound on my rv770
(~100% graphics pipe usage)

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