Allegro frage!

[Ciro]

Kann man das Allegro Programm von der Schnelligkeit her optimieren,ohne es gleich im Fullscreenmodus laufen lassen zu müssen?...

#include <allegro.h>

int set_graphic_mode() {

    set_color_depth(16);
    if (set_gfx_mode(GFX_AUTODETECT_WINDOWED, 640, 480, 0, 0) >= 0) {
        return 1;
    }
    return 0;
}

int main(int argc, char **argv) {
    allegro_init();
    install_keyboard();

    if (!set_graphic_mode()) {
        allegro_message("Unable to set graphic mode!");
        exit(0);
    }

    BITMAP *doublebuffer = create_bitmap(SCREEN_W, SCREEN_H);
    BITMAP *logo = load_bitmap("allegro.tga", NULL);

    int x = 0;
    int y = 0;
    int dx = 1;
    int dy = 1;
    while (!keypressed()) {

        // Linker und rechter Rand
        if (x + dx < 0) {
            dx *= -1;
        } else if (x + logo->w >= SCREEN_W) {
            dx *= -1;
        }
        // Oberer und unterer Rand
        if (y + dy < 0) {
            dy *= -1;
        } else if (y + logo->h >= SCREEN_H) {
            dy *= -1;
        }
        x+= dx;
        y+= dy;

        acquire_bitmap(doublebuffer);
        clear(doublebuffer);
        blit( logo, doublebuffer, 0, 0, x, y, logo->w, logo->h);
        release_bitmap(doublebuffer);

        blit(doublebuffer, screen, 0, 0, 0, 0, doublebuffer->w, doublebuffer->h);
    }

} END_OF_MAIN();