Class: ImageSorcery

Inherits:
Object
  • Object
show all
Defined in:
lib/gm_support.rb,
lib/image_sorcery.rb

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(file) ⇒ ImageSorcery

Returns a new instance of ImageSorcery.



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# File 'lib/image_sorcery.rb', line 6

def initialize(file)
  @file = file
end

Instance Attribute Details

#file ⇒ Object (readonly)

Returns the value of attribute file.



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# File 'lib/image_sorcery.rb', line 4

def file
  @file
end

Class Method Details

.gm(file) ⇒ Object 



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# File 'lib/gm_support.rb', line 9

def gm file
  instance = new(file)
  instance.extend GmSupport
  instance
end

Instance Method Details

#convert(output, args = {}) ⇒ Object

Runs ImageMagick’s ‘convert’. See www.imagemagick.org/script/convert.php



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# File 'lib/image_sorcery.rb', line 27

def convert(output, args={})
  tokens  = ["convert"]
  tokens << convert_to_arguments(args) if args
  tokens << " '#{@file}#{"[#{args[:layer].to_s}]" if args[:layer]}'"
  tokens << " -annotate #{args[:annotate].to_s}" if args[:annotate]
  tokens << " #{output}"
  tokens  = convert_to_command(tokens)
  success = run(tokens)[1]
  success
end

#dimensions ⇒ Object

Return the x and y dimensions of an image as a hash.



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# File 'lib/image_sorcery.rb', line 52

def dimensions
  dimensions = identify(:layer => 0, :format => "%wx%h").chomp.split("x")
  { :x => dimensions[0].to_i,
    :y => dimensions[1].to_i }
end

#filename_changed? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/image_sorcery.rb', line 82

def filename_changed?
  (@filename_changed)
end

#height ⇒ Object

Returns the y dimension of an image as an integer



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# File 'lib/image_sorcery.rb', line 66

def height
  dimensions()[:y]
end

#identify(args = {}) ⇒ Object

Runs ImageMagick’s ‘identify’. See www.imagemagick.org/script/identify.php



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# File 'lib/image_sorcery.rb', line 41

def identify(args={})
  tokens = ["identify"]
  tokens << convert_to_arguments(args) if args
  tokens << " '#{@file}#{"[#{args[:layer].to_s}]" if args[:layer]}'"
  tokens  = convert_to_command(tokens)
  output  = run(tokens)[0]
  output
end

#manipulate!(args = {}) ⇒ Object

Runs ImageMagick’s ‘mogrify’. See www.imagemagick.org/script/mogrify.php



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# File 'lib/image_sorcery.rb', line 13

def manipulate!(args={})
  tokens  = ["mogrify"]
  tokens << convert_to_arguments(args) if args
  tokens << " '#{@file}#{"[#{args[:layer].to_s}]" if args[:layer]}'"
  tokens << " -annotate #{args[:annotate].to_s}" if args[:annotate]
  tokens  = convert_to_command(tokens)
  success = run(tokens)[1]
  replace_file(args[:format].to_s.downcase, args[:layer]) if success && args[:format]
  success
end

#montage(sources, args = {}) ⇒ Object

Runs ImageMagick’s ‘montage’. See www.imagemagick.org/script/montage.php



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# File 'lib/image_sorcery.rb', line 73

def montage(sources, args={})
  tokens = ["montage"]
  tokens << convert_to_arguments(args) if args
  sources.each {|source| tokens << " '#{source}'" }
  tokens << " '#{@file}'"
  tokens  = convert_to_command(tokens)
  success = run(tokens)[1]
end

#width ⇒ Object

Returns the x dimension of an image as an integer



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# File 'lib/image_sorcery.rb', line 60

def width
  dimensions()[:x]
end