Class: Zpl::Font

Inherits:
Object
  • Object
show all
Defined in:
lib/zpl-transformer/font.rb

Constant Summary collapse

AVAILABLE_FONTS =

Font matrix

FONT HxW (dots) TYPE

Bitmap fonts A 9 X 5 U-L-D B 11 X 7 U C, D 18 X 10 U-L-D E 42 x 20 OCR-B F 26 x 13 U-L-D G 60 x 40 U-L-D H 34 x 22 OCR-A P 20 x 18 U-L-D Q 28 x 24 U-L-D R 35 x 31 U-L-D S 40 x 35 U-L-D T 48 x 42 U-L-D U 59 x 53 U-L-D V 80 x 71 U-L-D

Scalable font 0 Default: 15 x 12 U-L-D

{
  "A" => Font.new(name: "A", base_height: 9, base_width: 5, type: :u_l_d),
  "B" => Font.new(name: "B", base_height: 11, base_width: 7, type: :u),
  "C" => Font.new(name: "C", base_height: 18, base_width: 10, type: :u_l_d),
  "D" => Font.new(name: "D", base_height: 18, base_width: 10, type: :u_l_d),
  "E" => Font.new(name: "E", base_height: 42, base_width: 20, type: :ocr_b),
  "F" => Font.new(name: "F", base_height: 26, base_width: 13, type: :u_l_d),
  "G" => Font.new(name: "G", base_height: 60, base_width: 40, type: :u_l_d),
  "H" => Font.new(name: "H", base_height: 34, base_width: 22, type: :ocr_a),
  "P" => Font.new(name: "P", base_height: 20, base_width: 18, type: :u_l_d),
  "Q" => Font.new(name: "Q", base_height: 28, base_width: 24, type: :u_l_d),
  "R" => Font.new(name: "R", base_height: 35, base_width: 31, type: :u_l_d),
  "S" => Font.new(name: "S", base_height: 40, base_width: 35, type: :u_l_d),
  "T" => Font.new(name: "T", base_height: 48, base_width: 42, type: :u_l_d),
  "U" => Font.new(name: "U", base_height: 59, base_width: 53, type: :u_l_d),
  "V" => Font.new(name: "V", base_height: 80, base_width: 71, type: :u_l_d),
  "0" => Font.new(name: "0", base_height: 15, base_width: 12, type: :u_l_d, scalable: true),
}

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(name:, base_height:, base_width:, type:, scalable: false) ⇒ Font

Returns a new instance of Font.



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# File 'lib/zpl-transformer/font.rb', line 7

def initialize(name:, base_height:, base_width:, type:, scalable: false)
  @name = name
  @base_height = base_height
  @base_width = base_width
  @type = type
  @scalable = scalable
end

Instance Attribute Details

#base_height ⇒ Object

Returns the value of attribute base_height.



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# File 'lib/zpl-transformer/font.rb', line 5

def base_height
  @base_height
end

#base_width ⇒ Object

Returns the value of attribute base_width.



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# File 'lib/zpl-transformer/font.rb', line 5

def base_width
  @base_width
end

#name ⇒ Object

Returns the value of attribute name.



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# File 'lib/zpl-transformer/font.rb', line 5

def name
  @name
end

#type ⇒ Object

Returns the value of attribute type.



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# File 'lib/zpl-transformer/font.rb', line 5

def type
  @type
end

Class Method Details

.all ⇒ Object 



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# File 'lib/zpl-transformer/font.rb', line 65

def self.all
  AVAILABLE_FONTS.values
end

.from_name?(font_name) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/zpl-transformer/font.rb', line 69

def self.from_name?(font_name)
  AVAILABLE_FONTS[font_name]
end

Instance Method Details

#base_size ⇒ Object 



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# File 'lib/zpl-transformer/font.rb', line 15

def base_size
  [@base_height, @base_width]
end

#normalize_single_size(input_size, ref_size:) ⇒ Object

Normalize input_size to be a multiple of ref_size.

Example: (with ref_size = 10)

input_size   normalized
    0           10
    7           10
   10           10
   11           20



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# File 'lib/zpl-transformer/font.rb', line 89

def normalize_single_size(input_size, ref_size:)
  if input_size % ref_size == 0
    input_size
  else
    ((input_size / ref_size) + 1) * ref_size
  end
end

#normalize_size(height:, width:) ⇒ Object

Normalize height and width to the font’s height and width.



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# File 'lib/zpl-transformer/font.rb', line 74

def normalize_size(height:, width:)
  [
    normalize_single_size(height, ref_size: base_height),
    normalize_single_size(width, ref_size: base_width),
  ]
end

#scalable? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/zpl-transformer/font.rb', line 19

def scalable?
  @scalable
end