Class: Imatcher::Image

Inherits:
ChunkyPNG::Image
  • Object
show all
Includes:
ColorMethods
Defined in:
lib/imatcher/image.rb

Overview

Extend ChunkyPNG::Image with some methods.

Instance Method Summary collapse

Methods included from ColorMethods

#brightness

Instance Method Details

#compare_each_pixel(image) ⇒ Object 



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# File 'lib/imatcher/image.rb', line 16

def compare_each_pixel(image)
  height.times do |y|
    next if image.row(y) == row(y)
    row(y).each_with_index do |pixel, x|
      yield(pixel, image[x, y], x, y)
    end
  end
end

#each_pixel ⇒ Object 



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# File 'lib/imatcher/image.rb', line 8

def each_pixel
  height.times do |y|
    row(y).each_with_index do |pixel, x|
      yield(pixel, x, y)
    end
  end
end

#inspect ⇒ Object 



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# File 'lib/imatcher/image.rb', line 47

def inspect
  "Image:#{object_id}<#{width}x#{height}>"
end

#render_bounds(left, bot, right, top) ⇒ Object 



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# File 'lib/imatcher/image.rb', line 43

def render_bounds(left, bot, right, top)
  rect(left, bot, right, top, rgb(255, 0, 0))
end

#sizes_match?(image) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/imatcher/image.rb', line 39

def sizes_match?(image)
  [width, height] == [image.width, image.height]
end

#to_grayscale ⇒ Object 



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

def to_grayscale
  each_pixel do |pixel, x, y|
    self[x, y] = grayscale(brightness(pixel).round)
  end
  self
end

#with_alpha(value) ⇒ Object 



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# File 'lib/imatcher/image.rb', line 32

def with_alpha(value)
  each_pixel do |pixel, x, y|
    self[x, y] = rgba(r(pixel), g(pixel), b(pixel), value)
  end
  self
end