PNG_LIBPNG_VER_RELEASE  266 modules/imgcodecs/src/grfmt_png.cpp #if (PNG_LIBPNG_VER_MAJOR*10000 + PNG_LIBPNG_VER_MINOR*100 + PNG_LIBPNG_VER_RELEASE >= 10209) || \
PNG_LIBPNG_VER_RELEASE  267 modules/imgcodecs/src/grfmt_png.cpp     (PNG_LIBPNG_VER_MAJOR == 1 && PNG_LIBPNG_VER_MINOR == 0 && PNG_LIBPNG_VER_RELEASE >= 18)