Class: Pixelflut::Image

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

Instance Method Summary collapse

Constructor Details

#initialize(file_name) ⇒ Image

Returns a new instance of Image.



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# File 'lib/pixelflut/image.rb', line 7

def initialize(file_name)
  @image = Magick::ImageList.new(file_name).first
rescue Magick::ImageMagickError => e
  raise(LoadError, e.message, cause: e)
end

Instance Method Details

#each_pixel ⇒ Object 



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# File 'lib/pixelflut/image.rb', line 29

def each_pixel
  return to_enum(__method__) unless block_given?
  @image.each_pixel { |px, x, y| 0 != px.alpha and yield(x, y, px) }
end

#height ⇒ Object 



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# File 'lib/pixelflut/image.rb', line 17

def height
  @image.rows
end

#resize_to(width, height = nil) ⇒ Object 



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# File 'lib/pixelflut/image.rb', line 21

def resize_to(width, height = nil)
  @image.resize_to_fit!(width, height)
end

#scale(factor) ⇒ Object 



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# File 'lib/pixelflut/image.rb', line 25

def scale(factor)
  @image.scale!(factor)
end

#width ⇒ Object 



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# File 'lib/pixelflut/image.rb', line 13

def width
  @image.columns
end