int alloc_image(struct image *img, int x, int y, int bpp);
int load_image(struct image *img, const char *fname);
int save_image(struct image *img, const char *fname);
int alloc_image(struct image *img, int x, int y, int bpp);
int load_image(struct image *img, const char *fname);
int save_image(struct image *img, const char *fname);