B_MASK           2941 3rdparty/libpng/pngrutil.c #        define B_MASKS(d,s) { B_MASK(1,d,s), S_MASK(3,d,s), S_MASK(5,d,s) }
B_MASK           2976 3rdparty/libpng/pngrutil.c             ((display)?B_MASK(pass,depth,png):S_MASK(pass,depth,png))