scm_c_define_gsubr ("SDL_DisplayFormat", 1, 0, 0, gacela_SDL_DisplayFormat);
scm_c_define_gsubr ("SDL_DisplayFormatAlpha", 1, 0, 0, gacela_SDL_DisplayFormatAlpha);
scm_c_define_gsubr ("SDL_MapRGB", 4, 0, 0, gacela_SDL_MapRGB);
scm_c_define_gsubr ("SDL_DisplayFormat", 1, 0, 0, gacela_SDL_DisplayFormat);
scm_c_define_gsubr ("SDL_DisplayFormatAlpha", 1, 0, 0, gacela_SDL_DisplayFormatAlpha);
scm_c_define_gsubr ("SDL_MapRGB", 4, 0, 0, gacela_SDL_MapRGB);