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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - Implement SSBOs in GLSL front-end and i965"
href="https://bugs.freedesktop.org/show_bug.cgi?id=89597">89597</a>
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<th>Summary</th>
<td>Implement SSBOs in GLSL front-end and i965
</td>
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<th>Product</th>
<td>Mesa
</td>
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<th>Version</th>
<td>unspecified
</td>
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<th>Hardware</th>
<td>Other
</td>
</tr>
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<th>URL</th>
<td>https://www.google.com/webhp?sourceid=chrome-instant&ion=1&espv=2&es_th=1&ie=UTF-8#es_th=1&q=gl%20ssbo
</td>
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<th>OS</th>
<td>All
</td>
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<th>Status</th>
<td>NEW
</td>
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<th>Severity</th>
<td>enhancement
</td>
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<th>Priority</th>
<td>medium
</td>
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<th>Component</th>
<td>Drivers/DRI/i965
</td>
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<th>Assignee</th>
<td>idr@freedesktop.org
</td>
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<th>Reporter</th>
<td>krh@bitplanet.net
</td>
</tr>
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<th>QA Contact</th>
<td>intel-3d-bugs@lists.freedesktop.org
</td>
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<p>
<div>
<pre>We need to add support for SSBOs (link in URL field). Very brief summary:
SSBOs are GL buffer objects accessed through interface blocks. In other words,
similar to UBOs, except 1) they're writable, 2) they can hold atomics and 3)
they have an optional dynamically sized array at the end.
Attached patch is a quick prototype that implements parts of the front-end
changes (adding the new 'buffer' keyword) and backend changes to add new
opcodes and implement SSBO loads using the date cache oword read message.
The implementation is not expected to exercise the hardware in new ways, we
already oword reads and writes and atomics. One exception is that for bounds
checking access to the variable length array we could use the resinfo sampler
message.</pre>
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</p>
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