Class: Sequel::Plugins::Paperclip::Processors::Image

Inherits:
Object
  • Object
show all
Defined in:
lib/sequel_paperclip/processors/image.rb,
lib/sequel_paperclip/processors/image.rb

Defined Under Namespace

Classes: Geometry

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(attachment, options) ⇒ Image

Returns a new instance of Image.



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# File 'lib/sequel_paperclip/processors/image.rb', line 10

def initialize(attachment, options)
  @name = "image"
  @attachment = attachment
  @options = options
end

Instance Attribute Details

#attachment ⇒ Object (readonly)

Returns the value of attribute attachment.



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# File 'lib/sequel_paperclip/processors/image.rb', line 7

def attachment
  @attachment
end

#name ⇒ Object (readonly)

Returns the value of attribute name.



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# File 'lib/sequel_paperclip/processors/image.rb', line 6

def name
  @name
end

#options ⇒ Object (readonly)

Returns the value of attribute options.



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# File 'lib/sequel_paperclip/processors/image.rb', line 8

def options
  @options
end

Instance Method Details

#post_runs ⇒ Object 



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# File 'lib/sequel_paperclip/processors/image.rb', line 56

def post_runs
end

#pre_runs(model, src_path) ⇒ Object

Raises:

  • (ArgumentError) 


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# File 'lib/sequel_paperclip/processors/image.rb', line 16

def pre_runs(model, src_path)
  @model = model
  @src_path = src_path
  @src_geometry = Geometry.from_file(@src_path)
  raise ArgumentError, "failed to identify #{@src_path}" unless @src_geometry
end

#run(style, style_options, dst_file) ⇒ Object 



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# File 'lib/sequel_paperclip/processors/image.rb', line 23

def run(style, style_options, dst_file)
  dst_geometry = Geometry.from_s(style_options[:geometry])
  dst_crop = style_options[:geometry][-1,1] == "#"
  resize_str, crop_str = @src_geometry.transform(dst_geometry, dst_crop)

  cmd = []
  cmd << "convert"
  
  cmd << "-resize"
  cmd << "'#{resize_str}'"
  
  if crop_str
    cmd << "-crop"
    cmd << "'#{crop_str}'"
  end

  if options[:convert_arguments]
    cmd << options[:convert_arguments]
  end

  case style_options[:format]
    when :gif, :apng
      cmd << "'#{@src_path}'"
    else
      # extract first frame only (works even when input is non-animated)
      cmd << "'#{@src_path}[0]'"
  end

  cmd << "'#{style_options[:format]}:#{dst_file.path}'"

  `#{cmd*" "}`
end