Bug 44696 - Rendering glitch in ShaderToy Nautilus demo with Mesa 7.11 Gallium 0.4 AMD RV710
Summary: Rendering glitch in ShaderToy Nautilus demo with Mesa 7.11 Gallium 0.4 AMD RV710
Status: RESOLVED FIXED
Alias: None
Product: Mesa
Classification: Unclassified
Component: Drivers/Gallium/r600 (show other bugs)
Version: unspecified
Hardware: Other All
: medium normal
Assignee: Default DRI bug account
QA Contact:
URL:
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Depends on:
Blocks:
 
Reported: 2012-01-11 10:29 UTC by Benoit Jacob
Modified: 2012-09-10 11:42 UTC (History)
0 users

See Also:
i915 platform:
i915 features:


Attachments
capture of the canvas, showing the rendering bug (242.73 KB, image/png)
2012-01-11 10:29 UTC, Benoit Jacob
Details
capture of the canvas, showing the rendering bug is gone (166.95 KB, image/png)
2012-09-10 11:36 UTC, Andreas Boll
Details

Description Benoit Jacob 2012-01-11 10:29:59 UTC
Created attachment 55460 [details]
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.
Comment 1 Andreas Boll 2012-09-10 11:36:32 UTC
Created attachment 66920 [details]
capture of the canvas, showing the rendering bug is gone
Comment 2 Andreas Boll 2012-09-10 11:42:37 UTC
As you can see in attachment 66920 [details]
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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