SDL step

gistfile1.txt

void Sim::init(){
    SDL_Init(SDL_INIT_EVERYTHING);
    TTF_Init();
    screen = SDL_SetVideoMode(1080, 720, 32, SDL_SWSURFACE);
    running = true;

#ifdef TEST_SDL_LOCK_OPTS
    EM_ASM("SDL.defaults.copyOnLock = false; SDL.defaults.discardOnLock = true; SDL.defaults.opaqueFrontBuffer = false;");
#endif

    if (SDL_MUSTLOCK(screen)) SDL_LockSurface(screen);
    for (int i = 0; i < 256; i++) {
    for (int j = 0; j < 256; j++) {
#ifdef TEST_SDL_LOCK_OPTS
        // Alpha behaves like in the browser, so write proper opaque pixels.
        int alpha = 255;
#else
        // To emulate native behavior with blitting to screen, alpha component is ignored. Test that it is so by outputting
        // data (and testing that it does get discarded)
        int alpha = (i+j) % 255;
#endif
        *((Uint32*)screen->pixels + i * 256 + j) = SDL_MapRGBA(screen->format, i, j, 255-i, alpha);
    }
    }
    if (SDL_MUSTLOCK(screen)) SDL_UnlockSurface(screen);
    SDL_Flip(screen); 

}

bool Sim::step(){
    SDL_Flip(screen);
    if( SDL_PollEvent( &event ) ) {
        //If the user has Xed out the window 
        if( event.type == SDL_QUIT ) {
            //Quit the program
            return false;
        }
        if(event.type == SDL_KEYDOWN){
            if(event.key.keysym.sym == SDLK_y){
                bool_gui_test_finished = true;
                bool_gui_result = true;
            }
            if( event.key.keysym.sym == SDLK_n){
                bool_gui_test_finished = true;
                bool_gui_result = false;
            }
        }
    }
    return true;
}