core/base.py

from PIL import Image


def repeat_partent(image: Image, new_width: str, new_height: str):
    '''
    This function takes an image and repeats the partent in the image to fill the target_tile_size.
    '''
    
    width, height = image.size
    new_width, new_height = int(new_width), int(new_height)
    
    
    # calculate the width of every partent in the image
    o = new_width//width
    list_width = [width]*o
    r = new_width%width
    if r > 0:
        list_width.append(r)
    
    # calculate the height of every partent in the image
    o = new_height//height
    list_height = [height]*o
    r = new_height%height
    if r > 0:
        list_height.append(r)
    
    # create a new image with the new width and height
    new_image = Image.new('RGB', (new_width, new_height))
    w_start, h_start = 0, 0 
    for w in list_width:
        for h in list_height:
            if h < height or w < width:
                new_image.paste(image.crop((0, 0, w, h)), (w_start, h_start))
            else:
                new_image.paste(image, (w_start, h_start))
            h_start += h
            
        w_start += w
        h_start = 0
    return new_image

# test the function
if __name__ == '__main__':
    image = Image.open("input.png")
    result = repeat_partent(image=image, new_width=2000, new_height=1000)
    result.save("output.png")