Failed to Initialize GLEW. Missing GL version

Question

I\'ve tried to set up SFML 2.0 with the latest version of the qt creator, I\'ve set up SFML right and I imported a small game I wrote in visual studio. Upon compilation, I g

Answer 1

putting the glewInit(); after the sf::window creation that solves my problem for using glew with sfml

Answer 2

It's because you are not initializing OpenGL. Example with the lib glut.

Wrong:

 glewInit();  // ERROR MISSING GL VERSION
 glutInitDisplayMode(GLUT_RGB); 

Good:

 glutInitDisplayMode(GLUT_RGB);
 glewInit();

EDIT I think for SFML:

 sf::Window   App(sf::VideoMode(400, 400, 32), "Window");
 glewInit();

EDIT 2 Test this code.

#include <SFML/Window.hpp>
#include <iostream>
#include <GL/glew.h>

int
main(int, const char**)
{
    GLenum      err;

    std::cout << "Start" << std::endl;
    std::cout << "Test 1" << std::endl;
    if ((err = glewInit()) != GLEW_OK)
        std::cout << glewGetErrorString(err) << std::endl;

    std::cout << "Init window" << std::endl;
    sf::Window  app(sf::VideoMode(400, 400, 32), "Windows");

    std::cout << "Test 2" << std::endl;
    if ((err = glewInit()) != GLEW_OK)
        std::cout << glewGetErrorString(err) << std::endl;
    std::cout << "End" << std::endl;
    return 0;
}

My output:

Start
Test 1
Missing GL version
Init window
Test 2
End

Compile with: g++ -W -Wall -Werror main.cpp -lsfml-window -lGLEW

Good Luck ;)

Answer 3

If you're using glew with glfw, use glfwMakeContextCurrent (https://github.com/Cloudef/glhck/issues/15)

Answer 4

For those using SDL2's Renderer functions, it needs to be right after SDL_CreateRenderer.

Answer 5

At the request of user3648895, I am posting my answer outside of the comments separately.

For those using GLFW instead of SFML, you need to call glewInit() after glfwMakeContextCurrent