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<th>Priority</th>
<td>medium
</td>
</tr>
<tr>
<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW --- - [llvmpipe] triangles with vertices that map to raster positions > viewport width/height are not displayed"
href="https://bugs.freedesktop.org/show_bug.cgi?id=80183">80183</a>
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<th>Assignee</th>
<td>mesa-dev@lists.freedesktop.org
</td>
</tr>
<tr>
<th>Summary</th>
<td>[llvmpipe] triangles with vertices that map to raster positions > viewport width/height are not displayed
</td>
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<th>Severity</th>
<td>normal
</td>
</tr>
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<th>Classification</th>
<td>Unclassified
</td>
</tr>
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<th>OS</th>
<td>All
</td>
</tr>
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<th>Reporter</th>
<td>florianlink@gmail.com
</td>
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<th>Hardware</th>
<td>Other
</td>
</tr>
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<th>Status</th>
<td>NEW
</td>
</tr>
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<th>Version</th>
<td>10.2
</td>
</tr>
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<th>Component</th>
<td>Other
</td>
</tr>
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<th>Product</th>
<td>Mesa
</td>
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<p>
<div>
<pre>Created <span class=""><a href="attachment.cgi?id=101296" name="attach_101296" title="Traces that reproduce the problem">attachment 101296</a> <a href="attachment.cgi?id=101296&action=edit" title="Traces that reproduce the problem">[details]</a></span>
Traces that reproduce the problem
When using llvmpipe/64bit, we experience missing triangles when one of the
vertices of the triangle has a raster position outside of the viewport
top/right.
It only happens when a GLSL shader is active, not when fixed function rendering
is used. It only happens with llvmpipe, using softpipe all is fine (also with
GLSL shader).
Attached you find a apitrace that works and a apitrace that shows the problem.
While MeVisLab.ok.trace (Frame 11) shows a textured polygon,
MeVisLab.wrong.trace (Frame 13) is rendered black, while it should show the
same textured polygon, clipped to the viewport width/height.
The traces contain some MeVisLab network rendering as well, these can be
ignored.</pre>
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</p>
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