PNG_WROTE_tIME    873 3rdparty/libpng/pngset.c        (png_ptr->mode & PNG_WROTE_tIME))
PNG_WROTE_tIME    199 3rdparty/libpng/pngwrite.c       png_ptr->mode |= PNG_WROTE_tIME;
PNG_WROTE_tIME    322 3rdparty/libpng/pngwrite.c           !(png_ptr->mode & PNG_WROTE_tIME))