Class: TJStamp

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

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(name: '王小明', size: 256, corner_size: 10, stroke_width: 20, font: File.join(__dir__, 'simsun.ttf'), color: 'red', background_color: 'none') ⇒ TJStamp 



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

def initialize name: '王小明', size: 256, corner_size: 10, stroke_width: 20, font: File.join(__dir__, 'simsun.ttf'), color: 'red', background_color: 'none'
  self.name = name
  self.size = size
  self.corner_size = corner_size
  self.stroke_width = stroke_width
  self.font = font
  self.color = color
  self.background_color = background_color
end

Instance Attribute Details

#background_color ⇒ Object

Returns the value of attribute background_color.



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

def background_color
  @background_color
end

#color ⇒ Object

Returns the value of attribute color.



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

def color
  @color
end

#corner_size ⇒ Object

Returns the value of attribute corner_size.



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

def corner_size
  @corner_size
end

#font ⇒ Object

Returns the value of attribute font.



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

def font
  @font
end

#name ⇒ Object

Returns the value of attribute name.



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

def name
  @name
end

#size ⇒ Object

Returns the value of attribute size.



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

def size
  @size
end

#stroke_width ⇒ Object

Returns the value of attribute stroke_width.



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

def stroke_width
  @stroke_width
end

Instance Method Details

#stamp ⇒ Object 



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# File 'lib/tjstamp.rb', line 21

def stamp
  raise 'Length of name must be in (1..4)' unless (1..4) === name.length
  canvas = Magick::Image.new(size, size){ self.background_color = 'none' }

  # square
  square = Magick::Draw.new
  square.stroke(color)
  square.fill(background_color)
  square.stroke_width(stroke_width)
  corner_width = corner_height = corner_size
  upper_x, left_y = stroke_width / 2, stroke_width / 2
  lower_x, right_y = size - stroke_width / 2, size - stroke_width / 2
  square.roundrectangle(upper_x, left_y, lower_x, right_y, corner_width, corner_height)
  # square.polyline(180,70, 173,78, 190,78, 191,62)
  
  square.draw(canvas)

  # text
  text = Magick::Draw.new
  text.font = font
  text.gravity = Magick::CenterGravity
  text.pointsize = size
  chars = name.chars
  
  case name.length
  when 1
    put_char char: chars[0], gravity: Magick::CenterGravity, draw: text, img: canvas
  when 2
    put_char char: chars[0], gravity: Magick::EastGravity, draw: text, img: canvas
    put_char char: chars[1], gravity: Magick::WestGravity, draw: text, img: canvas
  when 3
    put_char char: chars[0], gravity: Magick::EastGravity, draw: text, img: canvas
    put_char char: chars[1], gravity: Magick::NorthWestGravity, draw: text, img: canvas
    put_char char: chars[2], gravity: Magick::SouthWestGravity, draw: text, img: canvas
  when 4
    put_char char: chars[0], gravity: Magick::NorthEastGravity, draw: text, img: canvas
    put_char char: chars[1], gravity: Magick::SouthEastGravity, draw: text, img: canvas
    put_char char: chars[2], gravity: Magick::NorthWestGravity, draw: text, img: canvas
    put_char char: chars[3], gravity: Magick::SouthWestGravity, draw: text, img: canvas
  end
  
  canvas
end

#update(**params) ⇒ Object 



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# File 'lib/tjstamp.rb', line 16

def update **params
  params.each{ |key, value| send("#{key}=", value)}
  self
end