utils.py 文件源码

def set_data(self, A):
        """
        Set the image array

        ACCEPTS: numpy/PIL Image A
        """

        self._full_res = A
        self._A = A

        if (self._A.dtype != np.uint8 and
                not np.can_cast(self._A.dtype, np.float)):
            raise TypeError("Image data can not convert to float")

        if (self._A.ndim not in (2, 3) or
                (self._A.ndim == 3 and self._A.shape[-1] not in (3, 4))):
            raise TypeError("Invalid dimensions for image data")

        self._imcache = None
        self._rgbacache = None
        self._oldxslice = None
        self._oldyslice = None
        self._sx, self._sy = None, None