[vtkusers] GL_EXT_gpu_shader4 unsupported help

[Kurt Sansom]

That is helpful. Could you point me to the regular opengl drivers. I am not
stuck on mesa, but I will take a look at the post as well. Thank you.
On Feb 8, 2016 3:31 PM, "Ken Martin" <ken.martin at kitware.com> wrote:

> It looks like you are using OSMesa instead of the normal OpenGL driver.
> That is what is causing the issue I believe. If you do want OS mesa then I
> believe you need version 11.2 to get the OpenGL 3.2 support. See this nice
> post by Utkarsh on using OSMesa with the new VTK rendering engine,
>
> https://www.kitware.com/blog/home/post/999
>
> Thanks
> Ken
>
> On Mon, Feb 8, 2016 at 4:55 PM, Kurt Sansom <kayarre at gmail.com> wrote:
>
>> I am having this issue that my compiled version of VTK doesn't like
>> GL_EXT_gpu_shader4. I have the latest nvidia drivers installed and what
>> I believe is the correct OpenGL version. I messed with several of the CMake
>> VTK build settings to no avail. I also ran glxinfo which lists GL_EXT_gpu_shader4.
>> the output is attached. Any thoughts or help?
>>
>> I also tried adding these variables before running which just made the
>> program repeat output to the standard out.
>>
>>  export MESA_GL_VERSION_OVERRIDE=3.2; export
>> MESA_GLSL_VERSION_OVERRIDE=150;
>>
>> Executing vmtklevelsetsegmentation ...
>> Please choose initialization type:
>>  0: colliding fronts;
>>  1: fast marching;
>>  2: threshold;
>>  3: isosurface;
>>  4: seed
>>  GL_Version: 2.1 Mesa 10.6.5
>> ERROR: In
>> /home/ksansom/build/vmtk/vmtk-build/VTK/Rendering/OpenGL2/vtkOpenGLRenderWindow.cxx,
>> line 545
>> vtkOSOpenGLRenderWindow (0x4a61440): GL version 2.1 with the gpu_shader4
>> extension is not supported by your graphics driver but is required for the
>> new OpenGL rendering backend. Please update your OpenGL driver. If you are
>> using Mesa please make sure you have version 10.6.5 or later and make sure
>> your driver in Mesa supports OpenGL 3.2.
>>
>> ERROR: In
>> /home/ksansom/build/vmtk/vmtk-build/VTK/Rendering/OpenGL2/vtkShaderProgram.cxx,
>> line 369
>> vtkShaderProgram (0x3ade100): 1: #version 120
>> 2: #extension GL_EXT_gpu_shader4 : require
>> ...
>> 103:
>>
>> ERROR: In
>> /home/ksansom/build/vmtk/vmtk-build/VTK/Rendering/OpenGL2/vtkShaderProgram.cxx,
>> line 370
>> vtkShaderProgram (0x3ade100): 0:2(12): error: extension
>> `GL_EXT_gpu_shader4' unsupported in fragment shader
>>
>> --
>> Kurt Sansom
>>
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>
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> Ken Martin PhD
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