Bug 111621 - Strange glViewport behaviors with Lima driver
Summary: Strange glViewport behaviors with Lima driver
Alias: None
Product: Mesa
Classification: Unclassified
Component: Drivers/Gallium/Lima (show other bugs)
Version: git
Hardware: ARM Linux (All)
: not set not set
Assignee: mesa-dev
QA Contact:
Depends on:
Reported: 2019-09-10 02:55 UTC by Luke Tucker
Modified: 2019-09-18 18:35 UTC (History)
0 users

See Also:
i915 platform:
i915 features:

test program, screenshots and debug traces (58.12 KB, application/x-gzip)
2019-09-10 02:55 UTC, Luke Tucker

Description Luke Tucker 2019-09-10 02:55:11 UTC
Created attachment 145310 [details]
test program, screenshots and debug traces

When I use glViewport with non-zero x,y with the lima driver, everything appears to be clipped at unexpected locations (which does not align with the viewport).  I do not see this behavior with (for example) the llvmpipe driver.

I've attached a test program, a couple of screenshots (lima and llvmpipe output), the apitrace and other debug output.  Both show a 320x240 window with glViewport(80,60,160,120) containing a triangle. Apitrace replay also displays as expected. A Full window viewport works as expected.  The test program can be run with 4 arguments to change the arguments to glViewport.

For reference, this is running on an Allwinner R16 (aka A33 I think) which I gather has some rendition of Mali400 MP2.
Comment 1 GitLab Migration User 2019-09-18 18:35:56 UTC
-- GitLab Migration Automatic Message --

This bug has been migrated to freedesktop.org's GitLab instance and has been closed from further activity.

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