PNG_FILTER_UP    1600 png.h          #define PNG_ALL_FILTERS (PNG_FILTER_NONE | PNG_FILTER_SUB | PNG_FILTER_UP | \
PNG_FILTER_UP    1021 pngwrite.c                 png_ptr->do_filter = PNG_FILTER_UP; break;
PNG_FILTER_UP    1056 pngwrite.c              if ((png_ptr->do_filter & PNG_FILTER_UP) && png_ptr->up_row == NULL)
PNG_FILTER_UP    1062 pngwrite.c                        ~PNG_FILTER_UP);
PNG_FILTER_UP    1989 pngwutil.c        if (png_ptr->do_filter & (PNG_FILTER_AVG | PNG_FILTER_UP | PNG_FILTER_PAETH))
PNG_FILTER_UP    1994 pngwutil.c           if (png_ptr->do_filter & PNG_FILTER_UP)
PNG_FILTER_UP    2344 pngwutil.c          filter_to_do &= ~(PNG_FILTER_UP | PNG_FILTER_PAETH);
PNG_FILTER_UP    2568 pngwutil.c        if (filter_to_do == PNG_FILTER_UP)
PNG_FILTER_UP    2583 pngwutil.c        else if (filter_to_do & PNG_FILTER_UP)