Bug 39083

Summary: [regression, bisected, r600g] Wrong rendering of Bubbles3D screensaver
Product: Mesa Reporter: Jure Repinc <jlp.bugs>
Component: Drivers/Gallium/r600Assignee: Default DRI bug account <dri-devel>
Status: RESOLVED FIXED QA Contact:
Severity: normal    
Priority: medium    
Version: git   
Hardware: x86-64 (AMD64)   
OS: Linux (All)   
i915 platform: i915 features:
Attachments: bubble3d-good.png
[PATCH] r600g: LIT: clamp negative src.y to 0

Description Jure Repinc 2011-07-08 23:45:41 UTC
Instead of looking smooth and nicely translucent some part of bubbles appear to be opaque. I've bisected and the commit that caused this bad rendering is:

- r600g: LIT: swap MUL_LIT operands to fix 0^0

This is on AMD Radeon HD 5750 and with XScreenSaver 5.14
Comment 1 Jure Repinc 2011-07-08 23:46:20 UTC
Created attachment 48911 [details]
Comment 2 Jure Repinc 2011-07-08 23:46:49 UTC
Created attachment 48912 [details]
Comment 3 Vadim Girlin 2011-07-09 02:55:17 UTC
Created attachment 48913 [details] [review]
[PATCH] r600g: LIT: clamp negative src.y to 0

Does this patch help?
Comment 4 Jure Repinc 2011-07-09 08:10:44 UTC
Yes, with the patch applied the problem is gone. Thank you very much.

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