D50_Z0            268 3rdparty/libtiff/tif_aux.c             whitepoint[0] =	D50_X0 / (D50_X0 + D50_Y0 + D50_Z0);
D50_Z0            269 3rdparty/libtiff/tif_aux.c             whitepoint[1] =	D50_Y0 / (D50_X0 + D50_Y0 + D50_Z0);