_cairo_restrict_value (double *value, double min, double max)
cairo_current_rgb_color (cairo_t *cr, double *red, double *green, double *blue)
DEPRECATE (cairo_get_status_string, cairo_status_string);void_cairo_restrict_value (double *value, double min, double max){    if (*value < min)	*value = min;    else if (*value > max)	*value = max;}