Bug 101004 - Line has wrong coordinates when viewport width is reduced
Summary: Line has wrong coordinates when viewport width is reduced
Status: RESOLVED FIXED
Alias: None
Product: Mesa
Classification: Unclassified
Component: Drivers/DRI/i965 (show other bugs)
Version: 13.0
Hardware: Other All
: medium normal
Assignee: Intel 3D Bugs Mailing List
QA Contact: Intel 3D Bugs Mailing List
URL:
Whiteboard:
Keywords:
Depends on:
Blocks:
 
Reported: 2017-05-11 13:26 UTC by Ruslan Kabatsayev
Modified: 2017-05-11 16:48 UTC (History)
0 users

See Also:
i915 platform:
i915 features:

Attachments
Test program (1.42 KB, text/x-c++src)
2017-05-11 13:26 UTC, Ruslan Kabatsayev 		Details
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Description Ruslan Kabatsayev 2017-05-11 13:26:38 UTC 
Created attachment 131315 [details]
Test program

The attached test program draws a line. Its endpoint positions appear different between i965 driver and llvmpipe. In program's initial state, the bug is triggered. You can toggle the bug by pressing a key.

The bug triggers when glViewport is called with a width less than window width (namely, 0.6*windowWidth in the test).

glxinfo reports:
OpenGL renderer string: Mesa DRI Intel(R) Haswell Server 
OpenGL version string: 3.0 Mesa 13.0.6 (git-fcef88d)

Video controller from lspci:
Intel Corporation Xeon E3-1200 v3 Processor Integrated Graphics Controller (rev 06)

CPU name from /proc/cpuinfo:
Intel(R) Xeon(R) CPU E3-1226 v3 @ 3.30GHz
Comment 1 Kenneth Graunke 2017-05-11 15:55:39 UTC 
Please upgrade to Mesa 17.1.0 or at least Mesa 17.0.x.  I believe I fixed this in January, but the fixes never made it to the 13.0.x series.  Mesa 13.x is basically unsupported at this point.
Comment 2 Ruslan Kabatsayev 2017-05-11 16:48:56 UTC 
Is fixed indeed in 17.1.0-rc4.

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