[Mesa-dev] State of llvmpipe geometry shaders?

[Paul]

Brian Paul <brianp <at> vmware.com> writes:

> 
> On 07/11/2014 01:47 AM, Florian Link wrote:
> > Hi everyone,
> >
> > I read a post from 2012 that MESA supports geometry shaders. I tried a
> > current MESA 10.2.x release, but MESA GL_VERSION returns OpenGL version
> > 3.0 (not 3.2) and the
> > GL_ARB_geometry_shader4 extension is not reported in the MESA 
extensions.
> > The function lookup for the functions of GL_ARB_geometry_shader4 works,
> > though.
> > When I run a shader program with a geometry shader, the MESA linker
> > complains that the varying that is used in the fragment shader is not
> > emitted from the vertex shader, which indicates that the geometry shader
> > is not detected/used.
> >
> > Should geometry shaders work in the current MESA llvm pipe release, or
> > do I need to enable/compile in some code?
> >
> > regards,
> > Florian
> >
> > P.S. My geometry shader works on non-MESA native ATI/NVidia/Intel OpenGL
> > drivers, so I don't think it is a problem of my shader code, especially
> > the ATI drivers are quite strict.
> 
> llvmpipe supports GS, but only in core profiles.  With glxinfo, use the 
> -c option to see core profile version/extension info.
> 
> -Brian
> 

Hi.

I was also wondering about geometry shaders and the core profile with 
llvmpipe. I have cross compiled Mesa for Windows following the steps at qt-
project, then tested the DLL with OpenGL Extensions Viewer. All I get is 
OpenGL 3.0, and no core profiles. I have tested versions 10.2.2, 10.2.3 and 
10.3.0-devel with no luck so far. This message is as close as I have gotten 
to an answer, but it only seems to indicate that in Linux it just works (if 
you ask for a core profile).

Is it supported in Windows? If so, is there something that needs to be done 
to enable the core profile?

Regards,

Paul.