gdAffineConcat   5445 ext/gd/gd.c    	if (gdAffineConcat (mr, m1, m2) != GD_TRUE) {
gdAffineConcat    866 ext/gd/libgd/gd.h int gdAffineConcat (double dst[6], const double m1[6], const double m2[6]);
gdAffineConcat   2279 ext/gd/libgd/gd_interpolation.c 	gdAffineConcat(m, affine, m);