Method setimage

src/PIL/ImageFile.py:789–822

Called from ImageFile to set the core output image for the codec :param im: A core image object :param extents: a 4 tuple of (x0, y0, x1, y1) defining the rectangle for this tile :returns: None

(
        self,
        im: Image.core.ImagingCore,
        extents: tuple[int, int, int, int] | None = None,
    )

        self.fd = fd

    def setimage(
        self,
        im: Image.core.ImagingCore,
        extents: tuple[int, int, int, int] | None = None,
    ) -> None:
        """
        Called from ImageFile to set the core output image for the codec

        :param im: A core image object
        :param extents: a 4 tuple of (x0, y0, x1, y1) defining the rectangle
            for this tile
        :returns: None
        """

        # following c code
        self.im = im

        if extents:
            x0, y0, x1, y1 = extents

            if x0 < 0 or y0 < 0 or x1 > self.im.size[0] or y1 > self.im.size[1]:
                msg = "Tile cannot extend outside image"
                raise ValueError(msg)

            self.state.xoff = x0
            self.state.yoff = y0
            self.state.xsize = x1 - x0
            self.state.ysize = y1 - y0
        else:
            self.state.xsize, self.state.ysize = self.im.size

        if self.state.xsize <= 0 or self.state.ysize <= 0:
            msg = "Size must be positive"
            raise ValueError(msg)


class PyDecoder(PyCodec):