Class: Zebra::Zpl::Image

Inherits:
Object
  • Object
show all
Includes:
Printable
Defined in:
lib/zebra/zpl/image.rb

Defined Under Namespace

Classes: InvalidRotationError, InvalidSizeError, InvalidThresholdError

Instance Attribute Summary collapse

Attributes included from Printable

#data, #margin, #position, #x, #y

Instance Method Summary collapse

Methods included from Printable

#initialize, #justification, #justification=

Instance Attribute Details

#compress ⇒ Object 



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# File 'lib/zebra/zpl/image.rb', line 64

def compress
  @compress || true
end

#invert ⇒ Object 



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# File 'lib/zebra/zpl/image.rb', line 60

def invert
  @invert || false
end

#path ⇒ Object

Returns the value of attribute path.



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# File 'lib/zebra/zpl/image.rb', line 10

def path
  @path
end

Instance Method Details

#black_threshold ⇒ Object 



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# File 'lib/zebra/zpl/image.rb', line 56

def black_threshold
  @black_threshold || 0.5
end

#black_threshold=(value) ⇒ Object

Raises:



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# File 'lib/zebra/zpl/image.rb', line 51

def black_threshold=(value)
  raise InvalidThresholdError.new('Invalid black threshold') unless value.to_f >= 0 && value.to_f <= 1
  @black_threshold = value.to_f
end

#height ⇒ Object 



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# File 'lib/zebra/zpl/image.rb', line 38

def height
  @height || @img.height
end

#height=(value) ⇒ Object

Raises:



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# File 'lib/zebra/zpl/image.rb', line 33

def height=(value)
  raise InvalidSizeError.new('Invalid image height') unless value.to_i.positive?
  @height = value.to_i
end

#rotation ⇒ Object 



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# File 'lib/zebra/zpl/image.rb', line 47

def rotation
  @rotation || 0
end

#rotation=(rot) ⇒ Object

Raises:



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# File 'lib/zebra/zpl/image.rb', line 42

def rotation=(rot)
  raise InvalidRotationError unless (true if Float(rot) rescue false)
  @rotation = rot
end

#source ⇒ Object Also known as: src 



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# File 'lib/zebra/zpl/image.rb', line 18

def source
  @img
end

#to_zpl ⇒ Object 



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# File 'lib/zebra/zpl/image.rb', line 68

def to_zpl
  check_attributes
  modify
  graphics = @img.to_zpl(
    black_threshold: black_threshold,
    invert: invert,
    compress: compress
  )
  "^FO#{x},#{y}#{graphics}"
end

#width ⇒ Object 



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# File 'lib/zebra/zpl/image.rb', line 29

def width
  @width || @img.width
end

#width=(value) ⇒ Object

Raises:



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# File 'lib/zebra/zpl/image.rb', line 24

def width=(value)
  raise InvalidSizeError.new('Invalid image width') unless value.to_i.positive?
  @width = value.to_i
end