PNG_PASS_START_ROW   53 contrib/libtests/pngunknown.c #define PNG_PASS_START_ROW(pass) (((1U&~(pass))<<(3-((pass)>>1)))&7)
PNG_PASS_START_ROW   82 contrib/libtests/pngvalid.c #define PNG_PASS_START_ROW(pass) (((1U&~(pass))<<(3-((pass)>>1)))&7)
PNG_PASS_START_ROW 2589 png.h          #define PNG_PASS_START_ROW(pass) (((1&~(pass))<<(3-((pass)>>1)))&7)