module ChunkyPNG::Canvas::Operations
def grayscale!
- See: ChunkyPNG::Color#to_grayscale -
See: #grayscale -
Returns:
-
(ChunkyPNG::Canvas)- Returns itself, converted to grayscale.
def grayscale! pixels.map! { |pixel| ChunkyPNG::Color.to_grayscale(pixel) } self end