offset_y          873 ext/gd/libgd/gd.h int gdAffineTranslate (double dst[6], const double offset_x, const double offset_y);
offset_y          269 ext/gd/libgd/gd_matrix.c int gdAffineTranslate (double dst[6], const double offset_x, const double offset_y)
offset_y          276 ext/gd/libgd/gd_matrix.c 	dst[5] = offset_y;