Class: RecursiveImage

Inherits:
Object
  • Object
show all
Defined in:
lib/ordinals/recursive/image.rb

Instance Method Summary collapse

Constructor Details

#initialize(width, height) ⇒ RecursiveImage

Returns a new instance of RecursiveImage.



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# File 'lib/ordinals/recursive/image.rb', line 6

def initialize( width, height )
   @width  = width
   @height = height 

   @recursions = []
end

Instance Method Details

#add(obj) ⇒ Object Also known as: << 



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# File 'lib/ordinals/recursive/image.rb', line 13

def add( obj ) @recursions << obj; end

#count ⇒ Object Also known as: size 



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# File 'lib/ordinals/recursive/image.rb', line 16

def count() @recursions.size; end

#height ⇒ Object 



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# File 'lib/ordinals/recursive/image.rb', line 20

def height() @height; end

#to_svg(format = :standalone) ⇒ Object 



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# File 'lib/ordinals/recursive/image.rb', line 23

def to_svg( format=:standalone )
     buf = ''
   
if [:standalone].include?( format.downcase.to_sym )
      buf +=<<TXT
<svg
xmlns="http://www.w3.org/2000/svg"
width="100%" height="100%"
viewBox="0 0 #{width} #{height}">
TXT
else  ## assume :inline/:embed or such
    ## todo/check:  add px e.g. 100 => 100px - why? why not?
     buf +=<<TXT
<svg width="#{width}" height="#{height}">
TXT
  end

@recursions.each_with_index do |recursion,i|
  id, opts =  recursion.is_a?( Array )? recursion : [recursion, {}]

  pixelate = opts.has_key?(:pixelate) ? opts[:pixelate]
                                      : false
                             
  style = pixelate ? %Q[style="image-rendering: pixelated;"] : ''

  ## note: assumes spritesheet has tile of same size as image itself!!!!
  spritesheet = opts[:spritesheet]
  if spritesheet
      num = opts[:num] || opts[:tile]
      spritesheet_width = spritesheet[0] 
      tile_cols = spritesheet_width/width
      y,x = num.divmod( tile_cols ) 
    
buf += <<TXT 
  <svg viewBox="#{x*width} #{y*height} #{width} #{height}">
    <image href="/content/#{id}"
      #{style} />
  </svg>
TXT
  else
buf += <<TXT 
 <image href="/content/#{id}"
   #{style} />
TXT
  end
end

     buf += <<TXT
</svg>
TXT
    buf
end

#width ⇒ Object 



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# File 'lib/ordinals/recursive/image.rb', line 19

def width() @width; end