Class: Sankey::Renderers::RVG

Inherits:
Object
  • Object
show all
Includes:
Sankey, Renderer
Defined in:
lib/renderers/rvg.rb

Instance Method Summary collapse

Constructor Details

#initialize(data, filename = nil, args = {}) ⇒ RVG

Returns a new instance of RVG.



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# File 'lib/renderers/rvg.rb', line 10

def initialize(data, filename = nil, args = {})
  throw "data isn't ImageData" unless data.is_a? ImageData
  @grid = args[:grid] || false
  @vertices = data.vertices
  @filename = filename
  @width = args[:width] || data.width
  @height = args[:height] || data.height
  @width_ratio = 1.0 * @width / data.width
  @height_ratio = 1.0 * @height / data.height
end

Instance Method Details

#render ⇒ Object 



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# File 'lib/renderers/rvg.rb', line 21

def render
  canvas = Magick::ImageList.new
  canvas.new_image(@width, @height)
  draw_grid canvas if @grid
  @vertices.each { |v| draw_vertex canvas, v }
  if @filename.nil?
    return canvas.to_blob { self.format = 'PNG' }
  else
    canvas.write @filename
  end
end