''' Module mutate: Purpose provide image transformation support
'''

# Other modules to be involved
from PIL import Image
import color, locate, dim


def duplicate( orig ) :
    ''' Returns a new image that is a duplicate of image orig
    '''
    # get dimensions of the original
    ow, oh = orig.size

    # set dimensions of the new image
    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 of interest in the original
            ospot = nspot
    
            # get the pixel at the ospot
            opixel = orig.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 bluing( orig ) :
    ''' Returns a new image that is a variant of image orig where
        if p is a pixel in orig, color.blue( p ) is the corresponding
        pixel in the new image
    '''

    pass

def negative( orig ) :
    ''' Returns a new image that is a variant of image orig where
        if p is a pixel in orig, color.neg( p ) is the corresponding
        pixel in the new image
    '''

    pass

def monotone( orig ) : 
    ''' Returns a new image that is a variant of image orig where
        if p is a pixel in orig, color.bw( p ) is the corresponding
        pixel in the new image
    '''

    pass

def greying( orig ) :
    ''' Returns a new image that is a variant of image orig where
        if p is a pixel in orig, color.grey( p ) is the corresponding
        pixel in the new image
    '''

    pass


if ( __name__ == '__main__' ) :

    import url

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

    orig = url.get_image( link )

    new_image = duplicate( orig )

    new_image.show()