class Magick::Geometry

def initialize(width=nil, height=nil, x=nil, y=nil, flag=nil)
    raise(ArgumentError, "width set to #{width.to_s}") if width.is_a? GeometryValue
    raise(ArgumentError, "height set to #{height.to_s}") if height.is_a? GeometryValue
    raise(ArgumentError, "x set to #{x.to_s}") if x.is_a? GeometryValue
    raise(ArgumentError, "y set to #{y.to_s}") if y.is_a? GeometryValue
    # Support floating-point width and height arguments so Geometry
    # objects can be used to specify Image#density= arguments.
    if width == nil
        @width = 0
    elsif width.to_f >= 0.0
        @width = width.to_f
    else
        Kernel.raise ArgumentError, "width must be >= 0: #{width}"
    end
    if height == nil
        @height = 0
    elsif height.to_f >= 0.0
        @height = height.to_f
    else
        Kernel.raise ArgumentError, "height must be >= 0: #{height}"
    end
    @x    = x.to_i
    @y    = y.to_i
    @flag = flag
end