PNG_PASS_COL_SHIFT 2526 3rdparty/libpng/png.h #define PNG_PASS_COLS(width, pass) (((width)+(((1<<PNG_PASS_COL_SHIFT(pass))\
PNG_PASS_COL_SHIFT 2527 3rdparty/libpng/png.h    -1)-PNG_PASS_START_COL(pass)))>>PNG_PASS_COL_SHIFT(pass))
PNG_PASS_COL_SHIFT 2536 3rdparty/libpng/png.h    (((xIn)<<PNG_PASS_COL_SHIFT(pass))+PNG_PASS_START_COL(pass))