[vtk-developers] [VTK 0012385]: Please don't exclude Intel GPU's from VolumeRendering/vtkOpenGLGPUVolumeRayCastMapper.cxx

[Mantis Bug Tracker]

The following issue has been SUBMITTED. 
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http://vtk.org/Bug/view.php?id=12385 
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Reported By:                domibel
Assigned To:                
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Project:                    VTK
Issue ID:                   12385
Category:                   (No Category)
Reproducibility:            have not tried
Severity:                   minor
Priority:                   urgent
Status:                     backlog
Project:                    TBD 
Type:                       usability 
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Date Submitted:             2011-07-20 18:58 CDT
Last Modified:              2011-07-20 18:58 CDT
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Summary:                    Please don't exclude Intel GPU's from
VolumeRendering/vtkOpenGLGPUVolumeRayCastMapper.cxx
Description: 
Hi,

Intel GPU's contain as usual the substring "Mesa" in the OpenGL renderer string.

e.g.: Mesa DRI Mobile Intel® GM45 Express Chipset GEM 20091221 2009Q4
x86/MMX/SSE2

The following code excludes all those GPU's. I think this check should be
removed. It is better to inform the user what OpenGL feature is missing.


in VolumeRendering/vtkOpenGLGPUVolumeRayCastMapper.cxx:2160

  const char *gl_version=reinterpret_cast<const char
*>(glGetString(GL_VERSION));
  if(strstr(gl_version,"Mesa")!=0)
    {
    // - GL_VENDOR cannot be used because it can be "Brian Paul" or
    // "Mesa project"
    // - GL_RENDERER cannot be used because it can be "Software Rasterizer" or
    // "Mesa X11"
    // - GL_VERSION is more robust. It has things like "2.0 Mesa 7.0.4" or
    // "2.1 Mesa 7.2" or "2.1 Mesa 7.3-devel"
    // Mesa does not work with multiple draw buffers:
    // "framebuffer has bad draw buffer"
    // "render clipped 1 ERROR (x506) invalid framebuffer operation ext"
    this->LoadExtensionsSucceeded=0;
    return;
    }


Thanks
Dominique
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Issue History 
Date Modified    Username       Field                    Change               
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2011-07-20 18:58 domibel        New Issue                                    
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