const char* const ALPHA_MASK_URL("alphaMaskUrl");
const char* const REDRAW_IN_SCALING_DOWN_NAME("redrawInScalingDown");
const char* const MASKING_TYPE_NAME("maskingType");
const char* const ALPHA_MASK_URL("alphaMaskUrl");
const char* const REDRAW_IN_SCALING_DOWN_NAME("redrawInScalingDown");
const char* const MASKING_TYPE_NAME("maskingType");