171 lines
4.6 KiB
Python
171 lines
4.6 KiB
Python
#
|
|
# The Python Imaging Library.
|
|
# $Id$
|
|
#
|
|
# im.show() 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
|
|
else:
|
|
from pipes import quote
|
|
|
|
_viewers = []
|
|
|
|
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.
|
|
|
|
def show(image, title=None, **options):
|
|
for viewer in _viewers:
|
|
if viewer.show(image, title=title, **options):
|
|
return 1
|
|
return 0
|
|
|
|
##
|
|
# Base class for viewers.
|
|
|
|
class Viewer:
|
|
|
|
# main api
|
|
|
|
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
|
|
|
|
def get_format(self, image):
|
|
# return format name, or None to save as PGM/PPM
|
|
return self.format
|
|
|
|
def get_command(self, file, **options):
|
|
raise NotImplementedError
|
|
|
|
def save_image(self, image):
|
|
# save to temporary file, and return filename
|
|
return image._dump(format=self.get_format(image))
|
|
|
|
def show_image(self, image, **options):
|
|
# display given image
|
|
return self.show_file(self.save_image(image), **options)
|
|
|
|
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 2 127.0.0.1 >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/Preview.app"
|
|
command = "(%s %s; sleep 20; rm -f %s)&" % (command, quote(file), quote(file))
|
|
return command
|
|
|
|
register(MacViewer)
|
|
|
|
else:
|
|
|
|
# unixoids
|
|
|
|
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
|
|
|
|
class UnixViewer(Viewer):
|
|
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
|
|
|
|
class DisplayViewer(UnixViewer):
|
|
def get_command_ex(self, file, **options):
|
|
command = executable = "display"
|
|
return command, executable
|
|
|
|
if which("display"):
|
|
register(DisplayViewer)
|
|
|
|
class XVViewer(UnixViewer):
|
|
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 += " -name %s" % quote(title)
|
|
return command, executable
|
|
|
|
if which("xv"):
|
|
register(XVViewer)
|
|
|
|
if __name__ == "__main__":
|
|
# usage: python ImageShow.py imagefile [title]
|
|
print(show(Image.open(sys.argv[1]), *sys.argv[2:]))
|