class PDF::Reader::Filter::Ascii85
implementation of the Ascii85
filter
Public Class Methods
Source
# File lib/pdf/reader/filter/ascii85.rb, line 12 def initialize(options = {}) @options = options end
Public Instance Methods
Source
# File lib/pdf/reader/filter/ascii85.rb, line 20 def filter(data) data = "<~#{data}" unless data.to_s[0,2] == "<~" if defined?(::Ascii85Native) ::Ascii85Native::decode(data) else ::Ascii85::decode(data) end rescue Exception => e # Oops, there was a problem decoding the stream raise MalformedPDFError, "Error occured while decoding an ASCII85 stream (#{e.class.to_s}: #{e.to_s})" end
Decode the specified data using the Ascii85
algorithm. Relies on the AScii85 rubygem.