Class: Libis::Format::Converter::Jp2Converter

Inherits:
Base
  • Object
show all
Defined in:
lib/libis/format/converter/jp2_converter.rb

Instance Attribute Summary

Attributes inherited from Base

#flags, #options

Class Method Summary collapse

Instance Method Summary collapse

Methods inherited from Base

inherited, using_temp, #using_temp

Constructor Details

#initialize ⇒ Jp2Converter

Returns a new instance of Jp2Converter.



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# File 'lib/libis/format/converter/jp2_converter.rb', line 22

def initialize
  super
  @options = {
    color_xform: false,
    error_resilience: :ALL,
    lossless: true,
    progression_order: 'RLCP',
    tile_size: [1024, 1024],
    codeblock_size: [6, 6]
  }
end

Class Method Details

.input_types ⇒ Object 



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# File 'lib/libis/format/converter/jp2_converter.rb', line 12

def self.input_types
  i[TIFF JPG PNG BMP GIF PDF]
end

.output_types(format = nil) ⇒ Object 



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# File 'lib/libis/format/converter/jp2_converter.rb', line 16

def self.output_types(format = nil)
  return [] unless input_types.include?(format)

  [:JP2]
end

Instance Method Details

#codeblock_size(height = 6, width = 6) ⇒ Object 



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# File 'lib/libis/format/converter/jp2_converter.rb', line 58

def codeblock_size(height = 6, width = 6)
  @options[:codeblock_size] = [height, width]
end

#color_xform(flag = true) ⇒ Object 



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# File 'lib/libis/format/converter/jp2_converter.rb', line 38

def color_xform(flag = true)
  @options[:color_xform] = flag
end

#convert(source, target, format, opts = {}) ⇒ Object 



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# File 'lib/libis/format/converter/jp2_converter.rb', line 62

def convert(source, target, format, opts = {})
  super

  FileUtils.mkpath(File.dirname(target))

  options = []

  @options.each do |key, value|
    case key
    when :color_xform
      options << '--set-output-j2k-color-xform' << (value ? 'YES' : 'NO')
    when :error_resilience
      options << '--set-output-j2k-error-resilience' << value.to_s
    when :lossless
      if value
        options << '--set-output-j2k-xform' << 'R53' << '5' << '--set-output-j2k-ratio' << '0'
      else
        options << '--set-output-j2k-xform' << 'I97' << '--set-output-j2k-psnr' << '46'
      end
    when :progression_order
      options << '--set-output-j2k-progression-order' << value.to_s
    when :tile_size
      options << '--set-output-j2k-tile-size' << value[0].to_s << value[1].to_s
    when :codeblock_size
      options << '--set-output-j2k-codeblock-size' << value[0].to_s << value[1].to_s
    else # rubocop:disable Style/EmptyElse
      # do nothing
    end
  end

  result = Libis::Tools::Command.run(
    Libis::Format::Config[:j2k_cmd],
    '--input-file-name', source,
    '--set-output-type', 'JP2',
    *options,
    '--output-file-name', target
  )

  result.merge(files: [target], converter: self.class.name)
end

#error_resilience(value = :ALL) ⇒ Object 



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# File 'lib/libis/format/converter/jp2_converter.rb', line 42

def error_resilience(value = :ALL)
  @options[:error_resilience] = value
end

#j2kdriver(_) ⇒ Object 



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# File 'lib/libis/format/converter/jp2_converter.rb', line 34

def j2kdriver(_)
  # force usage of this converter
end

#lossless(value = true) ⇒ Object 



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# File 'lib/libis/format/converter/jp2_converter.rb', line 46

def lossless(value = true)
  @options[:lossless] = value
end

#progression_order(value = 'RLCP') ⇒ Object 



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# File 'lib/libis/format/converter/jp2_converter.rb', line 50

def progression_order(value = 'RLCP')
  @options[:progression_order] = value
end

#tile_size(width = 1024, height = 1024) ⇒ Object 



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# File 'lib/libis/format/converter/jp2_converter.rb', line 54

def tile_size(width = 1024, height = 1024)
  @options[:tile_size] = [width, height]
end