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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - Reading per-patch outputs in Tessellation Control Shader returns undefined values"
href="https://bugs.freedesktop.org/show_bug.cgi?id=105464">105464</a>
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<th>Summary</th>
<td>Reading per-patch outputs in Tessellation Control Shader returns undefined values
</td>
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<th>Product</th>
<td>Mesa
</td>
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<th>Version</th>
<td>git
</td>
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<th>Hardware</th>
<td>Other
</td>
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<th>OS</th>
<td>All
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<th>Status</th>
<td>NEW
</td>
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<th>Severity</th>
<td>normal
</td>
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<th>Priority</th>
<td>medium
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<th>Component</th>
<td>Drivers/Vulkan/radeon
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<th>Assignee</th>
<td>mesa-dev@lists.freedesktop.org
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<th>Reporter</th>
<td>philip.rebohle@tu-dortmund.de
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<th>QA Contact</th>
<td>mesa-dev@lists.freedesktop.org
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<pre>Created <span class=""><a href="attachment.cgi?id=138037" name="attach_138037" title="Patch for tessellation demo to reproduce the issue">attachment 138037</a> <a href="attachment.cgi?id=138037&action=edit" title="Patch for tessellation demo to reproduce the issue">[details]</a></span> <a href='page.cgi?id=splinter.html&bug=105464&attachment=138037'>[review]</a>
Patch for tessellation demo to reproduce the issue
As mentioned in the title, reading a per-patch output variable that was written
by a different invocation produces undefined results even after a barrier()
call.
The attached patch changes the tessellation control shader of the
'tessellation' demo from Sascha Willems' Vulkan samples in that it reads the
tessellation levels from a per-patch output array. Note that the shader needs
to be recompiled manually in order to reproduce the issue.</pre>
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