Graphics.Rendering.OpenGL.Raw.NV.RegisterCombiners2
glCombinerStageParameterfv
glGetCombinerStageParameterfv
gl_PER_STAGE_CONSTANTS
gl_CONSTANT_COLOR0
gl_CONSTANT_COLOR1
gl_COMBINER0
gl_COMBINER1
gl_COMBINER2
gl_COMBINER3
gl_COMBINER4
gl_COMBINER5
gl_COMBINER6
gl_COMBINER7