[Bug 44590] The Witness needs ATOC without multisampling

[wine-bugs at winehq.org]

https://bugs.winehq.org/show_bug.cgi?id=44590

--- Comment #7 from Józef Kucia <joseph.kucia at gmail.com> ---
(In reply to Matteo Bruni from comment #6)
> Would it be an option to use multisample rendering with SAMPLES=1? AFAIK
> that's a thing in OpenGL, although I'm not sure how we would decide between
> that and normal, non multisampled rendering / render targets and if that
> would break other things.

I don't think that OpenGL implementations support multisample textures with
samples=1. An OpenGL implementation is allowed to allocate more samples. Most
drivers probably return a multisample texture with 2 samples.

Even if drivers would support multisample textures with 1 sample, then
multisample textures are quite limited. A special instruction has to be used to
fetch samples from a multisample texture, so you would have to transfer data
between multisample and non-multisample texture to emulate other operations.

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