Function IntGetProcAddress

deps/opencv/modules/core/src/gl_core_3_1.cpp:139–149

    #endif

    static void* IntGetProcAddress(const char* name)
    {
        void* func =  (void*) CV_GL_GET_PROC_ADDRESS(name);
        if (!func)
        {
            std::ostringstream msg;
            msg << "Can't load OpenGL extension [" << name << "]";
            CV_Error(CV_OpenGlApiCallError, msg.str());
        }
        return func;
    }
#else
    static void* IntGetProcAddress(const char*)
    {