PNG_sCAL_PRECISION 1500 3rdparty/libpng/pngpriv.h #define PNG_sCAL_MAX_DIGITS (PNG_sCAL_PRECISION+1/*.*/+1/*E*/+10/*exponent*/)
PNG_sCAL_PRECISION  460 3rdparty/libpng/pngset.c          PNG_sCAL_PRECISION);
PNG_sCAL_PRECISION  462 3rdparty/libpng/pngset.c          PNG_sCAL_PRECISION);