Class: CooCoo::Image::TransformedImage

Inherits:
Object
  • Object
show all
Defined in:
lib/coo-coo/image.rb

Instance Method Summary collapse

Constructor Details

#initialize(image, transform, filter = nil) ⇒ TransformedImage

Returns a new instance of TransformedImage.



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# File 'lib/coo-coo/image.rb', line 79

def initialize(image, transform, filter = nil)
  @image = image
  @transform = transform
  @filter = filter
end

Instance Method Details

#*(transform) ⇒ Object 



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# File 'lib/coo-coo/image.rb', line 97

def *(transform)
  t = if @transform
        TransformChain.new(@transform, transform)
      else
        transform
      end
  TransformedImage.new(@image, t, @filter)
end

#[](x, y, byte = nil) ⇒ Object 



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# File 'lib/coo-coo/image.rb', line 114

def [](x, y, byte = nil)
  x, y = *transform(x, y)
  p = @image[x, y, byte]
  filter(p, x, y)
end

#bpp ⇒ Object 



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# File 'lib/coo-coo/image.rb', line 93

def bpp
  @image.bpp
end

#filter(pixel, x, y) ⇒ Object 



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# File 'lib/coo-coo/image.rb', line 120

def filter(pixel, x, y)
  if @filter
    @filter.call(pixel, x, y)
  else
    pixel
  end
end

#height ⇒ Object 



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# File 'lib/coo-coo/image.rb', line 89

def height
  @image.height
end

#to_a ⇒ Object 



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# File 'lib/coo-coo/image.rb', line 106

def to_a
  height.times.collect do |y|
    width.times.collect do |x|
      self[x, y]
    end.flatten
  end
end

#transform(x, y) ⇒ Object 



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# File 'lib/coo-coo/image.rb', line 128

def transform(x, y)
  if @transform
    @transform.call(x, y)
  else
    [ x, y ]
  end
end

#width ⇒ Object 



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# File 'lib/coo-coo/image.rb', line 85

def width
  @image.width
end