Detecting the Shader Model

From OpenGL Wiki
Revision as of 18:49, 19 June 2006 by V-man (talk | contribs)
(diff) ← Older revision | Latest revision (diff) | Newer revision → (diff)
Jump to navigation Jump to search

This question has come up a few times and the best thread can be found here :;f=11;t=001090

Short explanation below:
If you can detect GL_NV_vertex_program3, then you have a SM 3.0 GPU
GL_NV_fragment_program2 would do as well.
This works for nVidia GPUs
ATI 3.0 GPUs advertize GL_ATI_shader_texture_lod
If those extensions are not present and if your GL version 2.0, then you have a SM 2.0 GPU.
In glhlib 1.55, I have added glhGetShaderModelAsString and glhGetShaderModel that does just that.
Another method is to write some specific shaders and see if they compile.
If they do compile, check the info log for the presence of the word "software"