pub fn decode_stream(stream: &Stream) -> Result<Vec<u8>, PdfError>Expand description
Apply the stream’s /Filter (if any) to recover the raw payload.
Generic decompression filters land here: FlateDecode (§7.4.4),
LZWDecode (§7.4.4.2 — round 98), ASCII85Decode (§7.4.3),
ASCIIHexDecode (§7.4.2), and RunLengthDecode (§7.4.5), in both
the single-Name and the Array (filter-chain) forms (§7.4.1).
Filters are applied in array order so a chain such as
[/ASCII85Decode /LZWDecode] (§7.4.4 Example 2) round-trips.
Terminal image codec filters (DCTDecode, JPXDecode,
JBIG2Decode, CCITTFaxDecode) are not decoded here — they
surface to the dedicated round-23 / round-35 image walkers that
hand their opaque payload to a codec crate. A /Filter naming one
of those is reported as unsupported rather than silently mangled.