''' Continue exploration of image manipulation '''

from PIL import Image

def cw( original ) :
    ''' Return a new image that is a 90 degree clockwise rotation
        of the original '''
    
    pass

def scale( original, xfactor, yfactor ) :
    ''' Return a new image that is a scaling of the original by
        xfactor in the x-dimension and yfactor in the y-dimension '''
    
    pass

def pixelate( drawing ) :
    ''' Return a new image that is a 16 by 16 scaling of a 1/16 by 1/16
        scaling of the original '''
    
    pass

def dup( original ) :
    ''' Return a new image that is copy of the original '''

    # get dimensions of the original
    ow, oh = original.size

    # set dimensions of the copy
    nw, nh = ow, oh

    # get a new appropriately sized image
    new_image = Image.new( 'RGB', ( nw, nh ) )

    # fill in every pixel of the new image
    for nx in range( 0, nw ) :      # consider every x value for the new image
        for ny in range( 0, nh ) :  # in tandem with every y value for the image
            
            # set the spot to be filled in the new image
            nspot = (nx ,ny )

            # determine the corresponding spot in the original to be copied
            ox = nx
            oy = ny

            ospot = ( ox, oy )

            # get the pixel at the ospot
            opixel = original.getpixel( ospot )

            # determine the pixel for the new image
            npixel = opixel

            # set the nspot in the new image
            new_image.putpixel( nspot, npixel )

    # return the filled in new image
    return new_image

def mirror( original ) :
    ''' Return a new image that mirrors the original '''
    # get dimensions of the original
    ow, oh = original.size

    # set dimensions of the copy
    nw, nh = ow, oh

    # get a new appropriately sized image
    new_image = Image.new( 'RGB', ( nw, nh ) )

    # fill in every pixel of the new image
    for nx in range( 0, nw ) :      # consider every x value for the new image
        for ny in range( 0, nh ) :  # in tandem with every y value for the image
            
            # set the spot to be filled in the new image
            nspot = (nx ,ny )

            # determine the corresponding spot in the original to be copied
            ox = (nw - 1 ) - nx
            oy = ny

            ospot = ( ox, oy )

            # get the pixel at the ospot
            opixel = original.getpixel( ospot )

            # determine the pixel for the new image
            npixel = opixel

            # set the nspot in the new image
            new_image.putpixel( nspot, npixel )

    # return the filled in new image
    return new_image

def flip( original ) :
    ''' Return a new image that is a flipping of the original '''
    # get dimensions of the original
    ow, oh = original.size

    # set dimensions of the copy
    nw, nh = ow, oh

    # get a new appropriately sized image
    new_image = Image.new( 'RGB', ( nw, nh ) )

    # fill in every pixel of the new image
    for nx in range( 0, nw ) :      # consider every x value for the new image
        for ny in range( 0, nh ) :  # in tandem with every y value for the image
            
            # set the spot to be filled in the new image
            nspot = (nx ,ny )

            # determine the corresponding spot in the original to be copied
            ox = nx
            oy = (nh - 1 ) - ny

            ospot = ( ox, oy )

            # get the pixel at the ospot
            opixel = original.getpixel( ospot )

            # determine the pixel for the new image
            npixel = opixel

            # set the nspot in the new image
            new_image.putpixel( nspot, npixel )

    # return the filled in new image
    return new_image

if ( __name__ == '__main__' ) :

    import url
    import manip

    # get the image
    link = input( 'Enter picture location: ' )
    original = url.get_image( link )
    original.show()

    # manipulate the image and show the effect
    #du = manip.dup( original );                 du.show();   input( 'Enter when ready: ' )
    #mi = manip.mirror( original );              mi.show();   input( 'Enter when ready: ' )
    #fl = manip.flip( original );                fl.show();   input( 'Enter when ready: ' )
    #cw = manip.cw( original );                  cw.show();   input( 'Enter when ready: ' )
    #sc = manip.scale( original, 2.00, 2.00 );   sc.show();   input( 'Enter when ready: ' )
    #sc = manip.scale( original, 0.50, 0.50 );   sc.show();   input( 'Enter when ready: ' )
    #sc = manip.scale( original, 2.00, 0.50 );   sc.show();   input( 'Enter when ready: ' )
    #sc = manip.scale( original, 0.50, 2.00 );   sc.show();   input( 'Enter when ready: ' )
    #pi = manip.pixelate( original );            pi.show();   input( 'Enter when ready: ' )