Class: PixScale::Pic

Inherits:
Object
  • Object
show all
Defined in:
lib/pix_scale/pic.rb

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(path) ⇒ Pic

Returns a new instance of Pic.



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# File 'lib/pix_scale/pic.rb', line 14

def initialize(path)
  @path = path
  @pic = Gdk::Pixbuf.new(path)
  @type = (/\A\.jpg\z/i =~ extname) ? "jpeg" : extname.sub(/^\./, "").downcase
end

Instance Attribute Details

#path ⇒ Object (readonly)

Returns the value of attribute path.



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# File 'lib/pix_scale/pic.rb', line 13

def path
  @path
end

#type ⇒ Object (readonly)

Returns the value of attribute type.



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# File 'lib/pix_scale/pic.rb', line 13

def type
  @type
end

Class Method Details

.scale_and_save(path, scale, type = nil) ⇒ Object 



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# File 'lib/pix_scale/pic.rb', line 9

def self.scale_and_save(path, scale, type=nil)
  new(path).scale_and_save(scale, type)
end

Instance Method Details

#save(output_path, type = nil) ⇒ Object 



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# File 'lib/pix_scale/pic.rb', line 57

def save(output_path, type=nil)
  output_type = type || @type
  @pic.save(output_path, output_type)
end

#scale(scale) ⇒ Object 



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# File 'lib/pix_scale/pic.rb', line 28

def scale(scale)
  new_pic = self.dup
  new_pic.scale!(scale)
  new_pic
end

#scale!(scale) ⇒ Object 



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# File 'lib/pix_scale/pic.rb', line 34

def scale!(scale)
  if scale.is_a?(Float)
    width = @pic.width * scale
    height = @pic.height * scale
  elsif scale.is_a?(Integer)
    width = scale
    height = @pic.height * (scale.to_f / @pic.width)
  elsif /\A[0-9]+\.[0-9]+\z/ =~ scale
    width = @pic.width * scale.to_f
    height = @pic.height * scale.to_f
  elsif /\A[0-9]+[^\.0-9][0-9]+\z/ =~ scale
    width, height = scale.split(/[^\.0-9]/).map(&:to_i)
  elsif /\A[0-9]+\z/ =~ scale
    width = scale.to_i
    height = @pic.height * (scale.to_f / @pic.width)
  elsif /\A[^\.0-9]([0-9]+)\z/ =~ scale
    width = @pic.width * ($1.to_f / @pic.height)
    height = $1.to_i
  end

  @pic = @pic.scale(width, height)
end

#scale_and_save(scale, type = nil) ⇒ Object 



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# File 'lib/pix_scale/pic.rb', line 20

def scale_and_save(scale, type=nil)
  scale_string = scale.to_s.sub(/[^\.0-9]/, "_")
  extention = type || extname
  extention = ".#{extention}" unless /\A\./ =~ extention
  output_path = "#{dirname}/#{basename}-#{scale_string}#{extention}"
  scale(scale).save(output_path, type)
end