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<base href="https://bugs.freedesktop.org/">
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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - Strange glViewport behaviors with Lima driver"
href="https://bugs.freedesktop.org/show_bug.cgi?id=111621">111621</a>
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<th>Summary</th>
<td>Strange glViewport behaviors with Lima driver
</td>
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<th>Product</th>
<td>Mesa
</td>
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<th>Version</th>
<td>19.1
</td>
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<th>Hardware</th>
<td>ARM
</td>
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<th>OS</th>
<td>Linux (All)
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<th>Status</th>
<td>NEW
</td>
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<th>Severity</th>
<td>not set
</td>
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<th>Priority</th>
<td>not set
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<th>Component</th>
<td>Drivers/Gallium/Lima
</td>
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<th>Assignee</th>
<td>mesa-dev@lists.freedesktop.org
</td>
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<th>Reporter</th>
<td>voxluci@gmail.com
</td>
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<p>
<div>
<pre>Created <span class=""><a href="attachment.cgi?id=145310" name="attach_145310" title="test program, screenshots and debug traces">attachment 145310</a> <a href="attachment.cgi?id=145310&action=edit" title="test program, screenshots and debug traces">[details]</a></span>
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.</pre>
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</p>
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