def blit(self, img, coordinates = (0,0)):

        #can we set a color mode so we can do a little bit of masking here?
        self._mSurface.blit(img.getPGSurface(), coordinates)
Blit one image onto the drawing layer at upper left coordinates
dataset/ETHPy150Open sightmachine/SimpleCV/SimpleCV/DrawingLayer.py/DrawingLayer.blit