Class: Morandi::SrgbConversion

Inherits:
Object
  • Object
show all
Defined in:
lib/morandi/srgb_conversion.rb

Overview

Converts the file under ‘path` to sRGB colour space

Class Method Summary collapse

Class Method Details

.default_icc_path(path) ⇒ Object 



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# File 'lib/morandi/srgb_conversion.rb', line 23

def self.default_icc_path(path)
  "#{path}.icc.jpg"
end

.perform(path, target_path: nil) ⇒ Object

Performs a conversion to srgb colour space if possible Returns a path to converted file on success or nil on failure



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# File 'lib/morandi/srgb_conversion.rb', line 10

def self.perform(path, target_path: nil)
  return unless suitable_for_jpegicc?(path)

  icc_file_path = target_path || default_icc_path(path)
  return icc_file_path if valid_jpeg?(icc_file_path)

  system('jpgicc', '-q97', path, icc_file_path, out: '/dev/null', err: '/dev/null')

  return unless valid_jpeg?(icc_file_path)

  icc_file_path
end

.suitable_for_jpegicc?(path) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/morandi/srgb_conversion.rb', line 38

def self.suitable_for_jpegicc?(path)
  valid_jpeg?(path)
end

.valid_jpeg?(path) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/morandi/srgb_conversion.rb', line 27

def self.valid_jpeg?(path)
  return false unless File.exist?(path)
  return false unless File.size(path).positive?

  type, = GdkPixbuf::Pixbuf.get_file_info(path)

  type && type.name.eql?('jpeg')
rescue StandardError
  false
end