old_blue         1012 ext/gd/libgd/gd.c 	int old_color, old_red, old_green, old_blue;
old_blue         1036 ext/gd/libgd/gd.c 						old_blue = gdImageBlue(im, old_color);
old_blue         1040 ext/gd/libgd/gd.c 						p_blue = (int) (((float) color_blue * p_alpha) + ((float) old_blue * old_alpha));