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<b><a class="bz_bug_link
bz_status_NEW "
title="NEW - gl_PrimitiveID is zero when rendering points of size > 1"
href="https://bugs.freedesktop.org/show_bug.cgi?id=96853#c5">Comment # 5</a>
on <a class="bz_bug_link
bz_status_NEW "
title="NEW - gl_PrimitiveID is zero when rendering points of size > 1"
href="https://bugs.freedesktop.org/show_bug.cgi?id=96853">bug 96853</a>
from <span class="vcard"><a class="email" href="mailto:denis.fisseler@tu-dortmund.de" title="denis.fisseler@tu-dortmund.de">denis.fisseler@tu-dortmund.de</a>
</span></b>
<pre>(In reply to Roland Scheidegger from <a href="show_bug.cgi?id=96853#c3">comment #3</a>)
<span class="quote">> In theory if there already is a user-provided gs (which doesn't output
> points) then the emulation code doesn't really apply. But I don't really
> know this code (other than knowing this is pretty tricky stuff...).</span >
According to my testing, GS with Mesa3d show a kind of strange mixed behavior.
I have a GS, that fakes wide lines by constructing screen aligned quads from
lines. If I use it in VMware with Ubuntu 16.04 LTS and Mesa3d, it does not
construct wide lines, but only lines of width 1. Now if I abort the GS, using a
return statement right at the beginning of the main method and do not output
anything, lines of width 1 are still shown in the viewport. For those lines
however to be colored correctly, I have to output that color from my GS. So it
seems the geometry output part of the GS is somehow overridden, while other
parts of it are not.</pre>
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