View Source Pdf.Reader.Filter.ASCII85 (ExPDF v1.0.1)

ASCII85Decode filter — decodes ASCII base-85 encoded data to binary.

Per PDF spec §7.4.3:

  • Characters ! (0x21) through u (0x75) encode 5-char groups to 4 bytes.
  • z is a shortcut for a group of 5 ! characters (representing 4 zero bytes).
  • ~> is the end-of-data (EOD) marker; any subsequent bytes are ignored.
  • Whitespace (space, tab, CR, LF, FF) is ignored.
  • Partial final group (1–4 chars) maps to 1–3 output bytes using padding.

Summary

Functions

decode(bytes, params)

Decode ASCII85-encoded bytes. params is ignored.

Functions

Link to this function

decode(bytes, params)

View Source 
@spec decode(binary(), map()) :: {:ok, binary()} | {:error, term()}

Decode ASCII85-encoded bytes. params is ignored.