PNG_API_RULE      193 3rdparty/libpng/pngconf.h #  if PNG_API_RULE == 2
PNG_API_RULE      204 3rdparty/libpng/pngconf.h #    if PNG_API_RULE == 1
PNG_API_RULE      215 3rdparty/libpng/pngconf.h #    if PNG_API_RULE == 1 && !defined(PNGAPI)