292 lines
8.9 KiB
Python
292 lines
8.9 KiB
Python
#
|
|
# 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.
|
|
#
|
|
|
|
try:
|
|
import tkinter
|
|
except ImportError:
|
|
import Tkinter
|
|
tkinter = Tkinter
|
|
del Tkinter
|
|
|
|
from PIL import Image
|
|
|
|
|
|
# --------------------------------------------------------------------
|
|
# Check for Tkinter interface hooks
|
|
|
|
_pilbitmap_ok = None
|
|
|
|
|
|
def _pilbitmap_check():
|
|
global _pilbitmap_ok
|
|
if _pilbitmap_ok is None:
|
|
try:
|
|
im = Image.new("1", (1, 1))
|
|
tkinter.BitmapImage(data="PIL:%d" % im.im.id)
|
|
_pilbitmap_ok = 1
|
|
except tkinter.TclError:
|
|
_pilbitmap_ok = 0
|
|
return _pilbitmap_ok
|
|
|
|
|
|
# --------------------------------------------------------------------
|
|
# PhotoImage
|
|
|
|
class PhotoImage(object):
|
|
"""
|
|
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=None, size=None, **kw):
|
|
|
|
# Tk compatibility: file or data
|
|
if image is None:
|
|
if "file" in kw:
|
|
image = Image.open(kw["file"])
|
|
del kw["file"]
|
|
elif "data" in kw:
|
|
from io import BytesIO
|
|
image = Image.open(BytesIO(kw["data"]))
|
|
del kw["data"]
|
|
|
|
if hasattr(image, "mode") and hasattr(image, "size"):
|
|
# got an image instead of a mode
|
|
mode = image.mode
|
|
if mode == "P":
|
|
# palette mapped data
|
|
image.load()
|
|
try:
|
|
mode = image.palette.mode
|
|
except AttributeError:
|
|
mode = "RGB" # default
|
|
size = image.size
|
|
kw["width"], kw["height"] = size
|
|
else:
|
|
mode = image
|
|
image = None
|
|
|
|
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):
|
|
name = self.__photo.name
|
|
self.__photo.name = None
|
|
try:
|
|
self.__photo.tk.call("image", "delete", name)
|
|
except:
|
|
pass # ignore internal errors
|
|
|
|
def __str__(self):
|
|
"""
|
|
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):
|
|
"""
|
|
Get the width of the image.
|
|
|
|
:return: The width, in pixels.
|
|
"""
|
|
return self.__size[0]
|
|
|
|
def height(self):
|
|
"""
|
|
Get the height of the image.
|
|
|
|
:return: The height, in pixels.
|
|
"""
|
|
return self.__size[1]
|
|
|
|
def paste(self, im, box=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.
|
|
:param box: A 4-tuple defining the left, upper, right, and lower pixel
|
|
coordinate. If None is given instead of a tuple, all of
|
|
the image is assumed.
|
|
"""
|
|
|
|
# convert to blittable
|
|
im.load()
|
|
image = im.im
|
|
if image.isblock() and im.mode == self.__mode:
|
|
block = image
|
|
else:
|
|
block = image.new_block(self.__mode, im.size)
|
|
image.convert2(block, image) # convert directly between buffers
|
|
|
|
tk = self.__photo.tk
|
|
|
|
try:
|
|
tk.call("PyImagingPhoto", self.__photo, block.id)
|
|
except tkinter.TclError:
|
|
# activate Tkinter hook
|
|
try:
|
|
from PIL import _imagingtk
|
|
try:
|
|
_imagingtk.tkinit(tk.interpaddr(), 1)
|
|
except AttributeError:
|
|
_imagingtk.tkinit(id(tk), 0)
|
|
tk.call("PyImagingPhoto", self.__photo, block.id)
|
|
except (ImportError, AttributeError, tkinter.TclError):
|
|
raise # configuration problem; cannot attach to Tkinter
|
|
|
|
# --------------------------------------------------------------------
|
|
# BitmapImage
|
|
|
|
|
|
class BitmapImage(object):
|
|
"""
|
|
|
|
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=None, **kw):
|
|
|
|
# Tk compatibility: file or data
|
|
if image is None:
|
|
if "file" in kw:
|
|
image = Image.open(kw["file"])
|
|
del kw["file"]
|
|
elif "data" in kw:
|
|
from io import BytesIO
|
|
image = Image.open(BytesIO(kw["data"]))
|
|
del kw["data"]
|
|
|
|
self.__mode = image.mode
|
|
self.__size = image.size
|
|
|
|
if _pilbitmap_check():
|
|
# fast way (requires the pilbitmap booster patch)
|
|
image.load()
|
|
kw["data"] = "PIL:%d" % image.im.id
|
|
self.__im = image # must keep a reference
|
|
else:
|
|
# slow but safe way
|
|
kw["data"] = image.tobitmap()
|
|
self.__photo = tkinter.BitmapImage(**kw)
|
|
|
|
def __del__(self):
|
|
name = self.__photo.name
|
|
self.__photo.name = None
|
|
try:
|
|
self.__photo.tk.call("image", "delete", name)
|
|
except:
|
|
pass # ignore internal errors
|
|
|
|
def width(self):
|
|
"""
|
|
Get the width of the image.
|
|
|
|
:return: The width, in pixels.
|
|
"""
|
|
return self.__size[0]
|
|
|
|
def height(self):
|
|
"""
|
|
Get the height of the image.
|
|
|
|
:return: The height, in pixels.
|
|
"""
|
|
return self.__size[1]
|
|
|
|
def __str__(self):
|
|
"""
|
|
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):
|
|
"""Copies the contents of a PhotoImage to a PIL image memory."""
|
|
photo.tk.call("PyImagingPhotoGet", photo)
|
|
|
|
|
|
# --------------------------------------------------------------------
|
|
# Helper for the Image.show method.
|
|
|
|
def _show(image, title):
|
|
|
|
class UI(tkinter.Label):
|
|
def __init__(self, master, im):
|
|
if im.mode == "1":
|
|
self.image = BitmapImage(im, foreground="white", master=master)
|
|
else:
|
|
self.image = PhotoImage(im, master=master)
|
|
tkinter.Label.__init__(self, master, image=self.image,
|
|
bg="black", bd=0)
|
|
|
|
if not tkinter._default_root:
|
|
raise IOError("tkinter not initialized")
|
|
top = tkinter.Toplevel()
|
|
if title:
|
|
top.title(title)
|
|
UI(top, image).pack()
|