Method: ChunkyPNG::Canvas::Operations#rotate_left!

Defined in:

lib/chunky_png/canvas/operations.rb

#rotate_left! ⇒ ChunkyPNG::Canvas Also known as: rotate_counter_clockwise!

Rotates the image 90 degrees counter-clockwise in place.

This method will change the original canvas. See #rotate_left for a version that leaves the canvas intact and returns a new rotated canvas instead.

Returns:

• (ChunkyPNG::Canvas) —

  Itself, but rotated.

# File 'lib/chunky_png/canvas/operations.rb', line 246

def rotate_left!
  new_pixels = []
  (width - 1).downto(0) { |i| new_pixels += column(i) }
  replace_canvas!(height, width, new_pixels)
end