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<base href="https://bugs.freedesktop.org/" />
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<body><table border="1" cellspacing="0" cellpadding="8">
<tr>
<th>Priority</th>
<td>medium
</td>
</tr>
<tr>
<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW --- - [llvmpipe] piglit glean fragProg1 Z-write test regression"
href="https://bugs.freedesktop.org/show_bug.cgi?id=72607">72607</a>
</td>
</tr>
<tr>
<th>Keywords</th>
<td>regression
</td>
</tr>
<tr>
<th>CC</th>
<td>jfonseca@vmware.com, mcclurem@vmware.com, sroland@vmware.com
</td>
</tr>
<tr>
<th>Assignee</th>
<td>mesa-dev@lists.freedesktop.org
</td>
</tr>
<tr>
<th>Summary</th>
<td>[llvmpipe] piglit glean fragProg1 Z-write test regression
</td>
</tr>
<tr>
<th>Severity</th>
<td>normal
</td>
</tr>
<tr>
<th>Classification</th>
<td>Unclassified
</td>
</tr>
<tr>
<th>OS</th>
<td>All
</td>
</tr>
<tr>
<th>Reporter</th>
<td>vlee@freedesktop.org
</td>
</tr>
<tr>
<th>Hardware</th>
<td>x86-64 (AMD64)
</td>
</tr>
<tr>
<th>Status</th>
<td>NEW
</td>
</tr>
<tr>
<th>Version</th>
<td>git
</td>
</tr>
<tr>
<th>Component</th>
<td>Other
</td>
</tr>
<tr>
<th>Product</th>
<td>Mesa
</td>
</tr></table>
<p>
<div>
<pre>mesa: 00faf82832f3e6ef886abad246b50cc47b901c1f (master)
$ PIGLIT_TEST="Z-write test" ./bin/glean -t fragProg1 --quick
FAILURE:
Program: Z-write test
Expected Z: 0.25
Observed Z: 0.5
fragProg1: FAIL rgba8, db, z24, s8, accrgba16, win+pmap, id 33
0 tests passed, 1 tests failed.
0319ea9ff6a9cc2eba4879fbe09c6fac137d6ce1 is the first bad commit
commit 0319ea9ff6a9cc2eba4879fbe09c6fac137d6ce1
Author: Matthew McClure <<a href="mailto:mcclurem@vmware.com">mcclurem@vmware.com</a>>
Date: Tue Nov 26 10:50:27 2013 -0800
llvmpipe: clamp fragment shader depth write to the current viewport depth
range.
With this patch, generate_fs_loop will clamp any fragment shader depth
writes
to the viewport's min and max depth values. Viewport selection is
determined
by the geometry shader output for the viewport array index. If no index is
specified, then the default viewport index is zero. Semantics for this path
can be found in draw_clamp_viewport_idx and lp_clamp_viewport_idx.
lp_jit_viewport was created to store viewport information visible to JIT
code,
and is validated when the LP_NEW_VIEWPORT dirty flag is set.
lp_rast_shader_inputs is responsible for passing the viewport_index through
the rasterizer stage to fragment stage (via lp_jit_thread_data).
Reviewed-by: Roland Scheidegger <<a href="mailto:sroland@vmware.com">sroland@vmware.com</a>>
Reviewed-by: José Fonseca <<a href="mailto:jfonseca@vmware.com">jfonseca@vmware.com</a>>
:040000 040000 5ad276a912f00a8ab3c3f94484c19c7029423ac0
473a6b36e915ccc84a096e18d5a806dea2b5aee4 M src
bisect run success</pre>
</div>
</p>
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