Basic SDL 2D draw

    #include <SDL2/SDL.h>
    #include <GL/gl.h>
    #include <GL/glu.h>

    int main(int argc, char *argv[])
    {
        SDL_Init(SDL_INIT_VIDEO);
        SDL_Window *screen = SDL_CreateWindow("Ma fenetre de jeu",
                              SDL_WINDOWPOS_UNDEFINED,
                              SDL_WINDOWPOS_UNDEFINED,
                              640, 480,
                              SDL_WINDOW_OPENGL);
        SDL_GLContext glcontext = SDL_GL_CreateContext(screen);

        bool continuer = true;
        SDL_Event event;

        while (continuer)
        {
            SDL_WaitEvent(&event);
            switch(event.type)
            {
                case SDL_QUIT:
                    continuer = false;
            }

            glClear(GL_COLOR_BUFFER_BIT);

            glBegin(GL_TRIANGLES);
                glColor3ub(255,0,0);    glVertex2d(-0.75,-0.75);
                glColor3ub(0,255,0);    glVertex2d(0,0.75);
                glColor3ub(0,0,255);    glVertex2d(0.75,-0.75);
            glEnd();

            glFlush();
            SDL_GL_SwapWindow(screen);
        }

        SDL_Quit();

        return 0;
    }