Bug 39083 - [regression, bisected, r600g] Wrong rendering of Bubbles3D screensaver
Summary: [regression, bisected, r600g] Wrong rendering of Bubbles3D screensaver
Status: RESOLVED FIXED
Alias: None
Product: Mesa
Classification: Unclassified
Component: Drivers/Gallium/r600 (show other bugs)
Version: git
Hardware: x86-64 (AMD64) Linux (All)
: medium normal
Assignee: Default DRI bug account
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Reported: 2011-07-08 23:45 UTC by Jure Repinc
Modified: 2011-07-10 10:33 UTC (History)
0 users

See Also:
i915 platform:
i915 features:

Attachments
bubble3d-good.png (31.92 KB, image/png)
2011-07-08 23:46 UTC, Jure Repinc 		Details
bubble3d-bad.png (35.49 KB, image/png)
2011-07-08 23:46 UTC, Jure Repinc 		Details
[PATCH] r600g: LIT: clamp negative src.y to 0 (2.22 KB, patch)
2011-07-09 02:55 UTC, Vadim Girlin 		Details | Splinter Review
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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:

86f8b4117f35c788c8a043c2e241eb19eaacae8c
- 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]
bubble3d-good.png
Comment 2 Jure Repinc 2011-07-08 23:46:49 UTC 
Created attachment 48912 [details]
bubble3d-bad.png
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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