watermark.py 文件源码

def mark(self, path, position=POSITION_BOTTOM_RIGHT):
        '''????????'''

        try:
            img = Image.open(path)
        except IOError:
            return None

        if img.size[0] < self._mosaic.size[0]:
            print 'width', img.size[0], self._mosaic.size[0]
            return None
        if img.size[1] < self._mosaic.size[1]:
            print 'height', img.size[1], self._mosaic.size[1]
            return None
        img_area = img.size[0] * img.size[1]
        mosaic_area = self._mosaic.size[0] * self._mosaic.size[1]
        ratio = 4
        if img_area < mosaic_area * ratio:
            return None

        self._locate(img, position)
        layer = Image.new('RGBA', img.size, (0, 0, 0, 0))
        layer.paste(self._mosaic, self.box)

        return Image.composite(layer, img, layer)