python 3.x - How to rotate an image on a canvas without using PIL?

Question

Is there any simple way to rotate an imported image on a tkinter canvas? I'd rather not use the PIL module, but I can't find any viable alternatives. (If it helps, I want to rotate some car images when they take a turn on a crossroad.)

Answer 1

Below is a simple but not efficient method to rotate a PhotoImage 90 (right), 180 and 270 (left) degrees:

def rotate_image(img, dir):
    w, h = img.width(), img.height()
    if dir in ['left', 'right']:
        newimg = PhotoImage(width=h, height=w)
    else: # 180 degree
        newimg = PhotoImage(width=w, height=h)
    for x in range(w):
        for y in range(h):
            rgb = '#%02x%02x%02x' % img.get(x, y)
            if dir == 'right': # 90 degrees
                newimg.put(rgb, (h-y,x))
            elif dir == 'left': # -90 or 270 degrees
                newimg.put(rgb, (y,w-x))
            else: # 180 degrees
                newimg.put(rgb, (w-x,h-y))
    return newimg