+ if (state.gradient_x1 != NULL)
+ dom_string_unref(state.gradient_x1);
+ if (state.gradient_x2 != NULL)
+ dom_string_unref(state.gradient_x2);
+ if (state.gradient_y1 != NULL)
+ dom_string_unref(state.gradient_y1);
+ if (state.gradient_y2 != NULL)
+ dom_string_unref(state.gradient_y2);