Class: ChunkyPNG::Image

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

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(width, height, background_color = ChunkyPNG::Pixel::TRANSPARENT) ⇒ Image

Returns a new instance of Image.



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# File 'lib/chunky_png/image.rb', line 6

def initialize(width, height, background_color = ChunkyPNG::Pixel::TRANSPARENT)
  @pixel_matrix = ChunkyPNG::PixelMatrix.new(width, height, background_color)
end

Instance Attribute Details

#pixel_matrix ⇒ Object (readonly)

Returns the value of attribute pixel_matrix.



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# File 'lib/chunky_png/image.rb', line 4

def pixel_matrix
  @pixel_matrix
end

Class Method Details

.from_pixel_matrix(matrix) ⇒ Object 



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# File 'lib/chunky_png/image.rb', line 10

def self.from_pixel_matrix(matrix)
  self.new(matrix.width, matrix.height, matrix.pixels)
end

Instance Method Details

#[](x, y) ⇒ Object 



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# File 'lib/chunky_png/image.rb', line 22

def [](x, y)
  pixel_matrix[x,y]
end

#[]=(x, y, pixel) ⇒ Object 



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# File 'lib/chunky_png/image.rb', line 26

def []=(x, y, pixel)
  pixel_matrix[x,y] = pixel
end

#height ⇒ Object 



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# File 'lib/chunky_png/image.rb', line 18

def height
  pixel_matrix.height
end

#pixels ⇒ Object 



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# File 'lib/chunky_png/image.rb', line 30

def pixels
  pixel_matrix.pixels
end

#save(filename, constraints = {}) ⇒ Object 



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

def save(filename, constraints = {})
  File.open(filename, 'w') { |io| write(io, constraints) }
end

#width ⇒ Object 



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# File 'lib/chunky_png/image.rb', line 14

def width
  pixel_matrix.width
end

#write(io, constraints = {}) ⇒ Object 



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# File 'lib/chunky_png/image.rb', line 34

def write(io, constraints = {})
  datastream = pixel_matrix.to_datastream(constraints)
  datastream.write(io)
end