png_do_write_interlace 1186 pngpriv.h      PNG_INTERNAL_FUNCTION(void,png_do_write_interlace,(png_row_infop row_info,
png_do_write_interlace  831 pngwrite.c           png_do_write_interlace(&row_info, png_ptr->row_buf + 1, png_ptr->pass);