# Returns some configs compatible with the specified `attributes`
	fun choose_configs(attribs: Array[Int]): nullable Array[EGLConfig] import Array[Int].length, Array[Int].[], Array[EGLConfig], Array[EGLConfig].add, Array[EGLConfig].as nullable, report_egl_error `{
		EGLConfig *configs;
		int n_configs;
		int n_attribs = Array_of_Int_length(attribs);
		int i;
		int *c_attribs = malloc(sizeof(int)*n_attribs);
		for (i = 0; i < n_attribs; i ++) {
			c_attribs[i] = Array_of_Int__index(attribs, i);
		}

		// get number of configs
		EGLBoolean r = eglChooseConfig(self, c_attribs, NULL, 0, &n_configs);

		if (r == EGL_FALSE) {
			EGLDisplay_report_egl_error(self, "failed to get number of available configs.");
			return null_Array_of_EGLConfig();
		} else if (n_configs == 0) {
			EGLDisplay_report_egl_error(self, "no config available.");
			return null_Array_of_EGLConfig();
		}

		configs = (EGLConfig*)malloc(sizeof(EGLConfig)*n_configs);

		r = eglChooseConfig(self, c_attribs, configs, n_configs, &n_configs);

		if (r == EGL_FALSE) {
			EGLDisplay_report_egl_error(self, "failed to load config.");
			return null_Array_of_EGLConfig();
		} else {
			Array_of_EGLConfig array = new_Array_of_EGLConfig();
			for (i=0; i < n_configs; i++)
				Array_of_EGLConfig_add(array, configs[i]);

			return Array_of_EGLConfig_as_nullable(array);
		}
	`}