''' Purpose: support image mirroring transformation
'''

# This one doesn't change the color of an image!
# It changes the spots!

def size( original ) :
    ''' Purpose: return the size of the new image when performing a mirroring
    '''

    nw, nh = original.size

    return (nw, nh)

def color( opixel ) :
    ''' Purpose: return the new pixel when performing a mirroring transformation
    '''

    npixel = opixel

    return npixel

# The dimensions and the colors stay the same. The SPOTS are changed.
def where( nspot, original ) :
    ''' Purpose: return the correspondent of nspot in the original when
            doing a mirroring
    '''
    w, h = original.size
    nx, ny = nspot # Extract the x,y from the spot
    ox = ( w-1 ) - nx  # Different x distance across
    oy = ny # Same y distance down
    ospot = ( ox, oy ) # Return an altered spot
    return ospot
    pass

if ( __name__ == '__main__' ) :

    import url
    from manip import manip
    
    # get web image of interest
    link = "http://www.cs.virginia.edu/~cs1112/images/mandrill/full.png"

    original = url.get_image( link )

    new_image = manip( original, size, color, where )

    new_image.show()