PNG_FILTER_VALUE_NONE  827 pngpread.c        if (png_ptr->row_buf[0] > PNG_FILTER_VALUE_NONE)
PNG_FILTER_VALUE_NONE  535 pngread.c         if (png_ptr->row_buf[0] > PNG_FILTER_VALUE_NONE)
PNG_FILTER_VALUE_NONE 3926 pngrutil.c        if (filter > PNG_FILTER_VALUE_NONE && filter < PNG_FILTER_VALUE_LAST)
PNG_FILTER_VALUE_NONE 1013 pngwrite.c              case PNG_FILTER_VALUE_NONE:
PNG_FILTER_VALUE_NONE 1977 pngwutil.c        png_ptr->row_buf[0] = PNG_FILTER_VALUE_NONE;
PNG_FILTER_VALUE_NONE 2410 pngwutil.c                 if (png_ptr->prev_filters[j] == PNG_FILTER_VALUE_NONE)
PNG_FILTER_VALUE_NONE 2424 pngwutil.c              sumlo = (sumlo * png_ptr->filter_costs[PNG_FILTER_VALUE_NONE]) >>
PNG_FILTER_VALUE_NONE 2427 pngwutil.c              sumhi = (sumhi * png_ptr->filter_costs[PNG_FILTER_VALUE_NONE]) >>
PNG_FILTER_VALUE_NONE 2767 pngwutil.c                 if (png_ptr->prev_filters[j] == PNG_FILTER_VALUE_NONE)