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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 --- - Khronos conformance test ES3-CTS.gtf.GL3Tests.transform_feedback.transform_feedback_vertex_id fails"
href="https://bugs.freedesktop.org/show_bug.cgi?id=80247">80247</a>
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<th>Assignee</th>
<td>idr@freedesktop.org
</td>
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<th>Summary</th>
<td>Khronos conformance test ES3-CTS.gtf.GL3Tests.transform_feedback.transform_feedback_vertex_id fails
</td>
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<th>QA Contact</th>
<td>intel-3d-bugs@lists.freedesktop.org
</td>
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<th>Severity</th>
<td>major
</td>
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<th>Classification</th>
<td>Unclassified
</td>
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<th>OS</th>
<td>Linux (All)
</td>
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<th>Reporter</th>
<td>anuj.phogat@gmail.com
</td>
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<th>Hardware</th>
<td>x86-64 (AMD64)
</td>
</tr>
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<th>Status</th>
<td>NEW
</td>
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<th>Version</th>
<td>git
</td>
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<th>Component</th>
<td>Drivers/DRI/i965
</td>
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<th>Product</th>
<td>Mesa
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<pre>Test fails with following error:
ERROR:transform_feedback_vertex_id:compareArrays(GLint):index 0 value 4 != 0
Found on further investigation that intel hardware always sets the VertexID
starting from 0, irrespective of the first index specified in
glDrawArrays(mode, first, count). Seems like this issue is present on multiple
Intel platforms (gen6,7,8). We need a software workaround to provide vertex
shader with correct gl_VertexID values.</pre>
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