PNG_ZBUF_SIZE      35 3rdparty/libpng/pnglibconf.h #define PNG_ZBUF_SIZE 8192
PNG_ZBUF_SIZE     228 3rdparty/libpng/pngpriv.h #  undef PNG_ZBUF_SIZE
PNG_ZBUF_SIZE     229 3rdparty/libpng/pngpriv.h #  define PNG_ZBUF_SIZE 65536L