image_fill_gradient 8001 imlib2.c         rb_define_method(cImage, "gradient", image_fill_gradient, -1);
image_fill_gradient 8002 imlib2.c         rb_define_method(cImage, "fill_gradient", image_fill_gradient, -1);
image_fill_gradient 8003 imlib2.c         rb_define_method(cImage, "color_range", image_fill_gradient, -1);
image_fill_gradient 8004 imlib2.c         rb_define_method(cImage, "fill_color_range", image_fill_gradient, -1);