<html>
<head>
<base href="https://bugs.freedesktop.org/">
</head>
<body><table border="1" cellspacing="0" cellpadding="8">
<tr>
<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - Some miptree maps don't use intel_mipmap_tree::offset"
href="https://bugs.freedesktop.org/show_bug.cgi?id=107073">107073</a>
</td>
</tr>
<tr>
<th>Summary</th>
<td>Some miptree maps don't use intel_mipmap_tree::offset
</td>
</tr>
<tr>
<th>Product</th>
<td>Mesa
</td>
</tr>
<tr>
<th>Version</th>
<td>git
</td>
</tr>
<tr>
<th>Hardware</th>
<td>Other
</td>
</tr>
<tr>
<th>OS</th>
<td>All
</td>
</tr>
<tr>
<th>Status</th>
<td>NEW
</td>
</tr>
<tr>
<th>Severity</th>
<td>normal
</td>
</tr>
<tr>
<th>Priority</th>
<td>medium
</td>
</tr>
<tr>
<th>Component</th>
<td>Drivers/DRI/i965
</td>
</tr>
<tr>
<th>Assignee</th>
<td>intel-3d-bugs@lists.freedesktop.org
</td>
</tr>
<tr>
<th>Reporter</th>
<td>nanleychery@gmail.com
</td>
</tr>
<tr>
<th>QA Contact</th>
<td>intel-3d-bugs@lists.freedesktop.org
</td>
</tr></table>
<p>
<div>
<pre>Miptree maps for stencil, depth-stencil, and etc-decompressed-workaround
miptrees don't use ::offset. This seems wrong.
I think we may run into an issue in the following case:
1. Create a DRI image from a miptree level > 1 via
__DRIimageExtensionRec::createImageFromTexture. The level must be in a
different tile than the base level. This will set __DRIimage::offset > 0.
2. Create an aformentioned problematic miptree from that image using
EGLImageTargetRenderbufferStorage or EGLImageTargetTexture2D (maybe also
__DriverAPIRec::MakeCurrent?). These use intel_miptree_create_for_dri_image
internally and will set intel_mipmap_tree::offset > 0.
3. Map the miptree for reading. We'll expect data from the level > 1, but we'll
instead get data from the base level.
If this is indeed possbile, we need a piglit test to confirm the issue and a
Mesa patch to fix it.</pre>
</div>
</p>
<hr>
<span>You are receiving this mail because:</span>
<ul>
<li>You are the assignee for the bug.</li>
<li>You are the QA Contact for the bug.</li>
</ul>
</body>
</html>