Class: Pdfrb::Model::Type::FlateDecodeParms

Inherits:
Cos::Dictionary show all
Defined in:
lib/pdfrb/model/type/filter_decode_parms.rb

Overview

FlateDecode /DecodeParms dictionary (s7.4.4.3): predictor settings shared with LZWDecode.

Direct Known Subclasses

LZWDecodeParms

Instance Attribute Summary

Attributes inherited from Object

#document, #gen, #oid, #value

Instance Method Summary collapse

Methods inherited from Cos::Dictionary

#[], #[]=, apply_arlington_definition, arlington_default, arlington_key_to_symbol, arlington_one_type_to_ruby, arlington_required?, arlington_scalar, arlington_types_to_ruby, arlington_version, define_field, define_field_from_arlington, #delete, #each, each_field, #each_raw, #empty?, field, #initialize, #key?, #keys, lookup_type, merged_field, own_fields, #pdf_type, register_type, type_map, #validate

Methods included from Cos::ArlingtonBacked

#arlington_object

Methods inherited from Object

#==, define_type, #deref, #indirect?, #initialize, #must_be_indirect?, #pdf_type, pdf_type

Constructor Details

This class inherits a constructor from Pdfrb::Model::Cos::Dictionary

Instance Method Details

#bits_per_component ⇒ Object 



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# File 'lib/pdfrb/model/type/filter_decode_parms.rb', line 13

def bits_per_component; self[:BitsPerComponent] || 8; end

#colors ⇒ Object 



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# File 'lib/pdfrb/model/type/filter_decode_parms.rb', line 12

def colors; self[:Colors] || 1; end

#columns ⇒ Object 



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# File 'lib/pdfrb/model/type/filter_decode_parms.rb', line 14

def columns; self[:Columns] || 1; end

#png_predictor? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/pdfrb/model/type/filter_decode_parms.rb', line 16

def png_predictor?; predictor >= 10; end

#predictor ⇒ Object 



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# File 'lib/pdfrb/model/type/filter_decode_parms.rb', line 11

def predictor; self[:Predictor] || 1; end

#tiff_predictor? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/pdfrb/model/type/filter_decode_parms.rb', line 17

def tiff_predictor?; predictor == 2; end