''' Module mutate: Purpose provide support for pixel mutation

    Name 1:
    Name 2:

    Email id 1:
    Email id 2:
'''

def same( p ) :
    ''' Returns a new pixel whose RGB values are ( r, g, b ), where r, g,
        and b are are the RGB values of pixel p
    '''

    r, g, b = p

    result = ( r, g, b )

    return result


def blue( p ) :
    ''' Returns a new pixel whose RGB values are ( 0, 0, b ), where b is
        the B value of pixel p
    '''
   
    r, g, b = p

    result = ( 0, 0, b )

    return result

def fade( p ) :
    # This function is making it paler -- we wanted whole number values
    # for r, g, b which is why we int everything
    # We also took the min of 255 and the product of 5 times the r
    # value so that they don't exceed 255
    # we multiplied it by 1.5 to make it more white (bring it closer to
    # the white color value)
    r, g, b = p

    pale_red   = int( 1.5 * r )         # getting an RGB value shifted towards white
    pale_green = int( 1.5 * g )
    pale_blue  = int( 1.5 * b )

    pale_red   = min( 255, pale_red )   # make sure shift is a legal RGB value
    pale_green = min( 255, pale_green )
    pale_blue  = min( 255, pale_blue )

    return ( pale_red, pale_green, pale_blue )

def neg( p ) :
    ''' Returns a new pixel whose RGB values are the inverse of pixel p,
        that is ( 255 - r, 255 - g, 255 - b ), where r, g, and b are are
        the RGB values of pixel p
    '''
   
    r, g, b = p

    result = ( 255 - r, 255 - g, 255 - b )

    return result

def bw( p ) : 
    ''' Returns a new pixel whose RRB values are either ( 0, 0, 0 ) or
        ( 255, 255, 255 ).  
        
        It returns ( 0, 0, 0 ) if the average of RGB values for pixel p is closer 
        to 0 then 255; otherwise, it returns ( 255, 255, 255 )
    '''

    r, g, b = p

    average = ( r + g + b ) // 3        # get the average of the RGB components

    if ( average < 255 / 2 ) :          # see whether average is below or above the mid RGB level
        return (   0,   0,   0 )
    else :
        return ( 255, 255, 255 )

    return result

def grey( p ) :
    ''' Returns a new pixel whose RGB values are ( m, m, m ) where m is
        is the integer cast of .299r + .587g + .114b, where r, g, and b
        are the RGB values of pixel p
    '''

    r, g, b = p

    m = int( .299 * r + .587 * g + .114 * b )

    return ( m, m, m )


def sepia( p ) :
    ''' Returns a new pixel whose RGB values are ( sr, sg, sb ) are based on the sepia formula
    '''