[Mesa-dev] [Bug 96853] gl_PrimitiveID is zero when rendering points of size > 1

bugzilla-daemon at freedesktop.org bugzilla-daemon at freedesktop.org
Fri Jul 8 13:41:37 UTC 2016


--- Comment #3 from Roland Scheidegger <sroland at vmware.com> ---
(In reply to denis.fisseler from comment #2)
> This sounds plausible, thank you for shedding some light on this! The faking
> of large points through triangles in a GS would also explain, why some of my
> GS code, I use with large points and for constructing wide lines, doesn't
> work as expected. Unfortunately this part of the mesa code seems to have a
> lot of bugs, and produces crashes, no rendering output and false rendering
> output. The same code works flawless with ubuntu, win7, winxp on
> nvidia/amd/intel graphics in a non-vm environment.

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...).

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