module ChunkyPNG::Canvas::Operations

def compose(other, offset_x = 0, offset_y = 0)

Other tags:

See

Raises:

(ChunkyPNG::OutOfBounds) - when the other canvas doesn't fit on this one,

Returns:

(ChunkyPNG::Canvas) - Returns itself, but with the other canvas composed onto it.

Parameters:

offset_y (Integer) -- The y-offset to apply the new forgeround on.
offset_x (Integer) -- The x-offset to apply the new forgeround on.
other (ChunkyPNG::Canvas) -- The foreground canvas to compose on the

def compose(other, offset_x = 0, offset_y = 0)
  check_size_constraints!(other, offset_x, offset_y)
  for y in 0...other.height do
    for x in 0...other.width do
      set_pixel(x + offset_x, y + offset_y, ChunkyPNG::Color.compose(other.get_pixel(x, y), get_pixel(x + offset_x, y + offset_y)))
    end
  end
  self
end

Instance Methods