[Mesa-dev] [Bug 41152] [glsl] Shader backend in Regnum Online does not work

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=41152

--- Comment #8 from Ian Romanick <idr at freedesktop.org> 2012-03-04 19:07:26 PST ---
(In reply to comment #6)
> I'm not sure what SM3 and 4 corresponds to in OpenGL (if anything?). You might
> want to ask the RO devs what OpenGL version, extensions etc. they're checking
> for.

There isn't really an analog for SM3 in OpenGL.  It's basically the OpenGL 2.0
feature set.  Various vendors correctly supported it to varying degrees.

Various SM4 features were added from GLSL 1.30 to GLSL 3.30 (and the associated
OpenGL versions).  The main SM4 features that Mesa drivers lack are OpenGL 3.1
UBOs (this is the "16 x 4096" constant registers in the Wikipedia table) and
OpenGL 3.2 geometry shaders.

See also http://en.wikipedia.org/wiki/HLSL

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