[Mesa-users] Radeon HD 7870 | Geo Shaders Ext | Fedora 21

[Brian Paul]

On 03/26/2015 05:04 AM, AxP wrote:
> Hey guys,
>
> the last few days I was wondering if I had a working geometry shader
> extension and then in which mesa version it would come. Maybe I am
> overlooking something. I tried to find the extension with glxinfo and
> tried a shader demo of opentk.
> I own a Radeon HD 7870 and I am using the free radeon drivers that come
> with fedora, so radeon. I found that the shader should be there for
> southern island, like written here:
> http://mesamatrix.net/#Version_OpenGL3.2-GLSL1.50_Extension_Geometryshaders
> and
> http://www.x.org/wiki/RadeonFeature/
> So, Problem is that I have no clue if the feature is actually available,
> which version of mesa, wether there was some news about this (Did google
> or duckduckgo it :P) or or or. So Im kinda confused because of all the
> green fields on the feature site.
> Do you know if the geometry shader extension is working with the free
> driver?
>
> Many thanks,
> AxP
>
>> OpenGL vendor string: X.Org
>> OpenGL renderer string: Gallium 0.4 on AMD PITCAIRN
>> OpenGL core profile version string: 3.3 (Core Profile) Mesa 10.4.3

If you have version 3.3, you have geometry shader support.  GS was added 
in GL 3.2.

However, you will not see the GL_NV/EXT/ARB_geometry_shader listed in 
the GL_EXTENSIONS string.  Those extensions all have slight differences 
from the core 3.2 support and it was easier for us to not support them. 
  I have no idea what OpenTK might be looking for.

-Brian


>> OpenGL core profile shading language version string: 3.30
>> OpenGL core profile context flags: (none)
>> OpenGL core profile profile mask: core profile
>
>> mesa-dri-drivers.x86_64 10.4.3-1.20150124.fc21
>> mesa-filesystem.x86_64           10.4.3-1.20150124.fc21
>> mesa-libEGL.i686                 10.4.3-1.20150124.fc21
>> mesa-libEGL.x86_64               10.4.3-1.20150124.fc21
>> mesa-libEGL-devel.x86_64         10.4.3-1.20150124.fc21
>> mesa-libGL.i686                  10.4.3-1.20150124.fc21
>> mesa-libGL.x86_64                10.4.3-1.20150124.fc21
>> mesa-libGL-devel.x86_64          10.4.3-1.20150124.fc21
>> mesa-libGLES.x86_64              10.4.3-1.20150124.fc21
>> mesa-libGLU.x86_64               9.0.0-7.fc21
>> @koji-override-0/$releasever
>> mesa-libgbm.i686                 10.4.3-1.20150124.fc21
>> mesa-libgbm.x86_64               10.4.3-1.20150124.fc21
>> mesa-libglapi.i686               10.4.3-1.20150124.fc21
>> mesa-libglapi.x86_64             10.4.3-1.20150124.fc21
>> mesa-libwayland-egl.x86_64       10.4.3-1.20150124.fc21
>> mesa-libxatracker.x86_64         10.4.3-1.20150124.fc21
>
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