Re: Radeon HD 7870 | Geo Shaders Ext | Fedora 21

Ah, thanks for the answer.
So theoretically it should work but shouldn't show as 
ARB_geometry_shader_4, if I understand you correctly.
Hm, is there a 100% obvious way of testing if it works. Perhaps OpenTk 
is just buggy?

-AxP

Am 26.03.2015 um 15:36 schrieb 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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>>
>>
>

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