1PDF::Builder::Basic::PDUFs:e:rFiClotnetrr(i3b)uted PerlPDDoFc:u:mBeunitladteiro:n:Basic::PDF::Filter(3)
2
6 PDF::Builder::Basic::PDF::Filter - Abstract superclass for PDF stream
7 filters
8
10 $f = PDF::Builder::Basic::PDF::Filter->new();
11 $str = $f->outfilt($str, 1);
12 print OUTFILE $str;
13 while (read(INFILE, $dat, 4096))
15 { $store .= $f->infilt($dat, 0); }
16 $store .= $f->infilt("", 1);
17
19 A Filter object contains state information for the process of
20 outputting and inputting data through the filter. The precise state
21 information stored is up to the particular filter and may range from
22 nothing to whole objects created and destroyed.
23 Each filter stores different state information for input and output and
25 thus may handle one input filtering process and one output filtering
26 process at the same time.
27
29 PDF::Builder::Basic::PDF::Filter->new()
30 Creates a new filter object with empty state information ready for
31 processing data both input and output.
32 $dat = $f->infilt($str, $isend)
34 Filters from output to input the data. Notice that "$isend == 0"
35 implies that there is more data to come and so following it $f may
36 contain state information (usually due to the break-off point of
37 $str not being tidy). Subsequent calls will incorporate this
38 stored state information.
39 "$isend == 1" implies that there is no more data to follow. The
41 final state of $f will be that the state information is empty.
42 Error messages are most likely to occur here since if there is
43 required state information to be stored following this data, then
44 that would imply an error in the data.
45 $str = $f->outfilt($dat, $isend)
47 Filter stored data ready for output. Parallels "infilt".
48perl v5.36.0 2023-01-23PDF::Builder::Basic::PDF::Filter(3)