Function updatescreensize

source/src/main.cpp:489–495

bool needsautoscreenshot = false;

void updatescreensize()
{
    SDL_GetWindowSize(screen, &screenw, &screenh);
    if(screenh < 1) screenh = 1;
    VIRTW = screenw * VIRTH / screenh;
    glViewport(0, 0, screenw, screenh);
}

void screenres(int w, int h)
{