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<body><span class="vcard"><a class="email" href="mailto:kenneth@whitecape.org" title="Kenneth Graunke <kenneth@whitecape.org>"> <span class="fn">Kenneth Graunke</span></a>
</span> changed
<a class="bz_bug_link
bz_status_REOPENED "
title="REOPENED - Unigine Heaven 4.0 silhuette run"
href="https://bugs.freedesktop.org/show_bug.cgi?id=92233">bug 92233</a>
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<th>What</th>
<th>Removed</th>
<th>Added</th>
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<td style="text-align:right;">Status</td>
<td>RESOLVED
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<td>REOPENED
</td>
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<td style="text-align:right;">Resolution</td>
<td>NOTABUG
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<td>---
</td>
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<td style="text-align:right;">Assignee</td>
<td>idr@freedesktop.org
</td>
<td>kenneth@whitecape.org
</td>
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<b><a class="bz_bug_link
bz_status_REOPENED "
title="REOPENED - Unigine Heaven 4.0 silhuette run"
href="https://bugs.freedesktop.org/show_bug.cgi?id=92233#c6">Comment # 6</a>
on <a class="bz_bug_link
bz_status_REOPENED "
title="REOPENED - Unigine Heaven 4.0 silhuette run"
href="https://bugs.freedesktop.org/show_bug.cgi?id=92233">bug 92233</a>
from <span class="vcard"><a class="email" href="mailto:kenneth@whitecape.org" title="Kenneth Graunke <kenneth@whitecape.org>"> <span class="fn">Kenneth Graunke</span></a>
</span></b>
<pre>That makes very little sense. But you're not wrong - Heaven 4.0 somehow works
on Broadwell but not Ivybridge.
This is, of course, a Unigine bug. IIRC they try to use
ARB_blend_func_extended but never specify which fragment shader output is color
0 and which is color 1. So, there's at best a 50/50 chance of getting it right
(assuming we try to guess, which we might not - it's illegal after all).
Apparently, on Broadwell, we happen to pick the right one, while on Ivybridge,
we don't. That's kind of surprising, but with 50/50 odds, sure, why not.
They fixed it in Heaven 4.1rc1 over a year and a half ago, but can't be
bothered to change the download link on their website to a working version.
I've no idea why.
Patch sent to mesa-dev to add those workarounds:
<a href="http://lists.freedesktop.org/archives/mesa-dev/2015-December/103837.html">http://lists.freedesktop.org/archives/mesa-dev/2015-December/103837.html</a></pre>
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