Class: Storyboard::GifRenderer

Inherits:
Renderer show all
Defined in:
lib/storyboard/generators/gif.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Methods inherited from Renderer

#add_subtitle, #write_mvg

Constructor Details

#initialize(parent) ⇒ GifRenderer

Returns a new instance of GifRenderer.



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# File 'lib/storyboard/generators/gif.rb', line 8

def initialize(parent)
  @dimensions = []
  @storyboard = parent
end

Instance Attribute Details

#dimensions ⇒ Object

Returns the value of attribute dimensions.



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# File 'lib/storyboard/generators/gif.rb', line 7

def dimensions
  @dimensions
end

#pdf ⇒ Object

Returns the value of attribute pdf.



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# File 'lib/storyboard/generators/gif.rb', line 7

def pdf
  @pdf
end

#storyboard ⇒ Object

Returns the value of attribute storyboard.



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# File 'lib/storyboard/generators/gif.rb', line 7

def storyboard
  @storyboard
end

Instance Method Details

#render_frame(frame_name, subtitle = nil) ⇒ Object 



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# File 'lib/storyboard/generators/gif.rb', line 22

def render_frame(frame_name, subtitle = nil)
  output_filename = File.join(@storyboard.options[:save_directory], "sub-#{File.basename(frame_name)}")
  image = MiniMagick::Image.open(frame_name)

  if(@dimensions.empty?)
    resize_height = (image[:height] * (@storyboard.options[:max_width].to_f/image[:width])).ceil
    set_dimensions(storyboard.options[:max_width], resize_height)
  end

  image.resize "#{@dimensions[0]}x#{@dimensions[1]}"
  image.quality("60")

  self.add_subtitle(image, subtitle, @dimensions) if subtitle
  image.format 'jpeg'
  image.write(output_filename)
  image.destroy!
end

#set_dimensions(w, h) ⇒ Object 



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# File 'lib/storyboard/generators/gif.rb', line 13

def set_dimensions(w,h)
  @dimensions = [w,h]
end

#write ⇒ Object 



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# File 'lib/storyboard/generators/gif.rb', line 17

def write
  `cd #{@storyboard.options[:save_directory]} && convert -coalesce -delay 10 -layers OptimizeTransparency -loop 0 -ordered-dither o8x8,8,8,4 +map sub-* "#{@storyboard.options[:write_to]}/#{@storyboard.options[:basename]}.gif"`
  LOG.info("Wrote #{@storyboard.options[:write_to]}/#{@storyboard.options[:basename]}.gif")
end