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+#
+# The Python Imaging Library.
+# $Id$
+#
+# a Tk display interface
+#
+# History:
+# 96-04-08 fl Created
+# 96-09-06 fl Added getimage method
+# 96-11-01 fl Rewritten, removed image attribute and crop method
+# 97-05-09 fl Use PyImagingPaste method instead of image type
+# 97-05-12 fl Minor tweaks to match the IFUNC95 interface
+# 97-05-17 fl Support the "pilbitmap" booster patch
+# 97-06-05 fl Added file= and data= argument to image constructors
+# 98-03-09 fl Added width and height methods to Image classes
+# 98-07-02 fl Use default mode for "P" images without palette attribute
+# 98-07-02 fl Explicitly destroy Tkinter image objects
+# 99-07-24 fl Support multiple Tk interpreters (from Greg Couch)
+# 99-07-26 fl Automatically hook into Tkinter (if possible)
+# 99-08-15 fl Hook uses _imagingtk instead of _imaging
+#
+# Copyright (c) 1997-1999 by Secret Labs AB
+# Copyright (c) 1996-1997 by Fredrik Lundh
+#
+# See the README file for information on usage and redistribution.
+#
+from __future__ import annotations
+
+import tkinter
+from io import BytesIO
+from typing import TYPE_CHECKING, Any, cast
+
+from . import Image, ImageFile
+
+if TYPE_CHECKING:
+ from ._typing import CapsuleType
+
+# --------------------------------------------------------------------
+# Check for Tkinter interface hooks
+
+
+def _get_image_from_kw(kw: dict[str, Any]) -> ImageFile.ImageFile | None:
+ source = None
+ if "file" in kw:
+ source = kw.pop("file")
+ elif "data" in kw:
+ source = BytesIO(kw.pop("data"))
+ if not source:
+ return None
+ return Image.open(source)
+
+
+def _pyimagingtkcall(
+ command: str, photo: PhotoImage | tkinter.PhotoImage, ptr: CapsuleType
+) -> None:
+ tk = photo.tk
+ try:
+ tk.call(command, photo, repr(ptr))
+ except tkinter.TclError:
+ # activate Tkinter hook
+ # may raise an error if it cannot attach to Tkinter
+ from . import _imagingtk
+
+ _imagingtk.tkinit(tk.interpaddr())
+ tk.call(command, photo, repr(ptr))
+
+
+# --------------------------------------------------------------------
+# PhotoImage
+
+
+class PhotoImage:
+ """
+ A Tkinter-compatible photo image. This can be used
+ everywhere Tkinter expects an image object. If the image is an RGBA
+ image, pixels having alpha 0 are treated as transparent.
+
+ The constructor takes either a PIL image, or a mode and a size.
+ Alternatively, you can use the ``file`` or ``data`` options to initialize
+ the photo image object.
+
+ :param image: Either a PIL image, or a mode string. If a mode string is
+ used, a size must also be given.
+ :param size: If the first argument is a mode string, this defines the size
+ of the image.
+ :keyword file: A filename to load the image from (using
+ ``Image.open(file)``).
+ :keyword data: An 8-bit string containing image data (as loaded from an
+ image file).
+ """
+
+ def __init__(
+ self,
+ image: Image.Image | str | None = None,
+ size: tuple[int, int] | None = None,
+ **kw: Any,
+ ) -> None:
+ # Tk compatibility: file or data
+ if image is None:
+ image = _get_image_from_kw(kw)
+
+ if image is None:
+ msg = "Image is required"
+ raise ValueError(msg)
+ elif isinstance(image, str):
+ mode = image
+ image = None
+
+ if size is None:
+ msg = "If first argument is mode, size is required"
+ raise ValueError(msg)
+ else:
+ # got an image instead of a mode
+ mode = image.mode
+ if mode == "P":
+ # palette mapped data
+ image.apply_transparency()
+ image.load()
+ mode = image.palette.mode if image.palette else "RGB"
+ size = image.size
+ kw["width"], kw["height"] = size
+
+ if mode not in ["1", "L", "RGB", "RGBA"]:
+ mode = Image.getmodebase(mode)
+
+ self.__mode = mode
+ self.__size = size
+ self.__photo = tkinter.PhotoImage(**kw)
+ self.tk = self.__photo.tk
+ if image:
+ self.paste(image)
+
+ def __del__(self) -> None:
+ try:
+ name = self.__photo.name
+ except AttributeError:
+ return
+ self.__photo.name = None
+ try:
+ self.__photo.tk.call("image", "delete", name)
+ except Exception:
+ pass # ignore internal errors
+
+ def __str__(self) -> str:
+ """
+ Get the Tkinter photo image identifier. This method is automatically
+ called by Tkinter whenever a PhotoImage object is passed to a Tkinter
+ method.
+
+ :return: A Tkinter photo image identifier (a string).
+ """
+ return str(self.__photo)
+
+ def width(self) -> int:
+ """
+ Get the width of the image.
+
+ :return: The width, in pixels.
+ """
+ return self.__size[0]
+
+ def height(self) -> int:
+ """
+ Get the height of the image.
+
+ :return: The height, in pixels.
+ """
+ return self.__size[1]
+
+ def paste(self, im: Image.Image) -> None:
+ """
+ Paste a PIL image into the photo image. Note that this can
+ be very slow if the photo image is displayed.
+
+ :param im: A PIL image. The size must match the target region. If the
+ mode does not match, the image is converted to the mode of
+ the bitmap image.
+ """
+ # convert to blittable
+ ptr = im.getim()
+ image = im.im
+ if not image.isblock() or im.mode != self.__mode:
+ block = Image.core.new_block(self.__mode, im.size)
+ image.convert2(block, image) # convert directly between buffers
+ ptr = block.ptr
+
+ _pyimagingtkcall("PyImagingPhoto", self.__photo, ptr)
+
+
+# --------------------------------------------------------------------
+# BitmapImage
+
+
+class BitmapImage:
+ """
+ A Tkinter-compatible bitmap image. This can be used everywhere Tkinter
+ expects an image object.
+
+ The given image must have mode "1". Pixels having value 0 are treated as
+ transparent. Options, if any, are passed on to Tkinter. The most commonly
+ used option is ``foreground``, which is used to specify the color for the
+ non-transparent parts. See the Tkinter documentation for information on
+ how to specify colours.
+
+ :param image: A PIL image.
+ """
+
+ def __init__(self, image: Image.Image | None = None, **kw: Any) -> None:
+ # Tk compatibility: file or data
+ if image is None:
+ image = _get_image_from_kw(kw)
+
+ if image is None:
+ msg = "Image is required"
+ raise ValueError(msg)
+ self.__mode = image.mode
+ self.__size = image.size
+
+ self.__photo = tkinter.BitmapImage(data=image.tobitmap(), **kw)
+
+ def __del__(self) -> None:
+ try:
+ name = self.__photo.name
+ except AttributeError:
+ return
+ self.__photo.name = None
+ try:
+ self.__photo.tk.call("image", "delete", name)
+ except Exception:
+ pass # ignore internal errors
+
+ def width(self) -> int:
+ """
+ Get the width of the image.
+
+ :return: The width, in pixels.
+ """
+ return self.__size[0]
+
+ def height(self) -> int:
+ """
+ Get the height of the image.
+
+ :return: The height, in pixels.
+ """
+ return self.__size[1]
+
+ def __str__(self) -> str:
+ """
+ Get the Tkinter bitmap image identifier. This method is automatically
+ called by Tkinter whenever a BitmapImage object is passed to a Tkinter
+ method.
+
+ :return: A Tkinter bitmap image identifier (a string).
+ """
+ return str(self.__photo)
+
+
+def getimage(photo: PhotoImage) -> Image.Image:
+ """Copies the contents of a PhotoImage to a PIL image memory."""
+ im = Image.new("RGBA", (photo.width(), photo.height()))
+
+ _pyimagingtkcall("PyImagingPhotoGet", photo, im.getim())
+
+ return im
+
+
+def _show(image: Image.Image, title: str | None) -> None:
+ """Helper for the Image.show method."""
+
+ class UI(tkinter.Label):
+ def __init__(self, master: tkinter.Toplevel, im: Image.Image) -> None:
+ self.image: BitmapImage | PhotoImage
+ if im.mode == "1":
+ self.image = BitmapImage(im, foreground="white", master=master)
+ else:
+ self.image = PhotoImage(im, master=master)
+ if TYPE_CHECKING:
+ image = cast(tkinter._Image, self.image)
+ else:
+ image = self.image
+ super().__init__(master, image=image, bg="black", bd=0)
+
+ if not getattr(tkinter, "_default_root"):
+ msg = "tkinter not initialized"
+ raise OSError(msg)
+ top = tkinter.Toplevel()
+ if title:
+ top.title(title)
+ UI(top, image).pack()