Image/canvas bliting (See related posts)

I can't remember how to call the blit method.
So, here's just a personal reminder.
(BTW, the pys60 doc has a wrong order between target and source)

   1  
   2  app.body = c = Canvas()
   3  w,h = 20,20
   4  im = Image.new(size=(w,h))
   5  
   6  # here's prototype
   7  # blit(im, source=(0,0,w,h), target=(0,0), mask=None, scale=0)
   8  # here are examples
   9  c.blit(im)  # put entire image on top-left
  10  c.blit(im, target=(70,70)) # put it about mid-screen
  11  c.blit(im, (0,0,w/2,h/2))  # put a quater image on top-left
  12  
  13  # double the image size and put it about mid-screen
  14  c.blit(im, target=(60,60,100,100), scale=1)

If scale is not specified and source <> target, the image
will be clipped instead of resized.

mask is a 1-bit image with the same size as image.

   1  mask = Image.new((w,h),'1')

Pixel on the image will be copied if the same pixel
on the mask is 'white'.
So we can use mask to make 'Sprite'.