Source code for PIL.ImageShow

# The Python Imaging Library.
# $Id$
# drivers
# History:
# 2008-04-06 fl   Created
# Copyright (c) Secret Labs AB 2008.
# See the README file for information on usage and redistribution.

from __future__ import print_function

from PIL import Image
import os, sys

if(sys.version_info >= (3, 3)):
    from shlex import quote
    from pipes import quote

_viewers = []

[docs]def register(viewer, order=1): try: if issubclass(viewer, Viewer): viewer = viewer() except TypeError: pass # raised if viewer wasn't a class if order > 0: _viewers.append(viewer) elif order < 0: _viewers.insert(0, viewer) ## # Displays a given image. # # @param image An image object. # @param title Optional title. Not all viewers can display the title. # @param **options Additional viewer options. # @return True if a suitable viewer was found, false otherwise.
[docs]def show(image, title=None, **options): for viewer in _viewers: if, title=title, **options): return 1 return 0 ## # Base class for viewers.
[docs]class Viewer: # main api
[docs] def show(self, image, **options): # save temporary image to disk if image.mode[:4] == "I;16": # @PIL88 @PIL101 # "I;16" isn't an 'official' mode, but we still want to # provide a simple way to show 16-bit images. base = "L" # FIXME: auto-contrast if max() > 255? else: base = Image.getmodebase(image.mode) if base != image.mode and image.mode != "1": image = image.convert(base) return self.show_image(image, **options) # hook methods
format = None
[docs] def get_format(self, image): # return format name, or None to save as PGM/PPM return self.format
[docs] def get_command(self, file, **options): raise NotImplementedError
[docs] def save_image(self, image): # save to temporary file, and return filename return image._dump(format=self.get_format(image))
[docs] def show_image(self, image, **options): # display given image return self.show_file(self.save_image(image), **options)
[docs] def show_file(self, file, **options): # display given file os.system(self.get_command(file, **options)) return 1 # --------------------------------------------------------------------
if sys.platform == "win32": class WindowsViewer(Viewer): format = "BMP" def get_command(self, file, **options): return ('start "Pillow" /WAIT "%s" ' '&& ping -n 2 >NUL ' '&& del /f "%s"' % (file, file)) register(WindowsViewer) elif sys.platform == "darwin": class MacViewer(Viewer): format = "BMP" def get_command(self, file, **options): # on darwin open returns immediately resulting in the temp # file removal while app is opening command = "open -a /Applications/" command = "(%s %s; sleep 20; rm -f %s)&" % (command, quote(file), quote(file)) return command register(MacViewer) else: # unixoids
[docs] def which(executable): path = os.environ.get("PATH") if not path: return None for dirname in path.split(os.pathsep): filename = os.path.join(dirname, executable) if os.path.isfile(filename): # FIXME: make sure it's executable return filename return None
[docs] class UnixViewer(Viewer):
[docs] def show_file(self, file, **options): command, executable = self.get_command_ex(file, **options) command = "(%s %s; rm -f %s)&" % (command, quote(file), quote(file)) os.system(command) return 1 # implementations
[docs] class DisplayViewer(UnixViewer):
[docs] def get_command_ex(self, file, **options): command = executable = "display" return command, executable
if which("display"): register(DisplayViewer)
[docs] class XVViewer(UnixViewer):
[docs] def get_command_ex(self, file, title=None, **options): # note: xv is pretty outdated. most modern systems have # imagemagick's display command instead. command = executable = "xv" if title: command = command + " -name %s" % quote(title) return command, executable
if which("xv"): register(XVViewer) if __name__ == "__main__": # usage: python imagefile [title] print(show([1]), *sys.argv[2:]))


你可以从IRC频道获取实时帮助: irc://。你也可以使用邮件列表: Image-SIG mailing list。当然还可以去 Stack Overflow

如果你发现了Bug,可以去 Github提交issues。