#include <GL/gl.h>
#include <GL/glut.h>
#include <sstream>
#include <iostream>

int main(int argc, char **argv)
{

    // only to have a valid gl context
    glutInit(&argc, argv);
    glutCreateWindow("check version");


    std::string gl_vendor = reinterpret_cast<const char*>(glGetString(GL_VENDOR));

    if (gl_vendor == "NVIDIA Corporation")
    {
        std::istringstream version_stream(reinterpret_cast<const char*>(glGetString(GL_VERSION)));
        std::string ogl_version, ogl_vendor;
        int driver_version_major, driver_version_minor;
        char dummy;
        version_stream >> ogl_version >> ogl_vendor >> driver_version_major >> dummy >> driver_version_minor;
        std::cout << ogl_version << " *** " << ogl_vendor << " *** " << driver_version_major << driver_version_minor << std::endl;
        if (driver_version_major >= 90)
        {
            std::cout << "found nvidia driver version >= 9xxx : " << driver_version_major << driver_version_minor << std::endl;
        }
        else
        {
            std::cout << "found nvidia driver version < 9xxx : " << driver_version_major << driver_version_minor << std::endl;
        }
    }
    else
    {
        std::cout << "no nvidia driver found : " << gl_vendor << std::endl;
    }

    return 0;
}