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83 lines
2.4 KiB
Python
83 lines
2.4 KiB
Python
""":mod:`wand.display` --- Displaying images
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~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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The :func:`display()` functions shows you the image. It is useful for
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debugging.
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If you are in Mac, the image will be opened by your default image application
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(:program:`Preview.app` usually).
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If you are in Windows, the image will be opened by :program:`imdisplay.exe`,
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or your default image application (:program:`Windows Photo Viewer` usually)
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if :program:`imdisplay.exe` is unavailable.
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You can use it from CLI also. Execute :mod:`wand.display` module through
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:option:`python -m <-m>` option:
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.. sourcecode:: console
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$ python -m wand.display wandtests/assets/mona-lisa.jpg
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.. versionadded:: 0.1.9
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"""
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from __future__ import print_function
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import ctypes
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import os
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import platform
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import sys
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import tempfile
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from .api import library
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from .exceptions import BlobError, DelegateError
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from .image import Image
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__all__ = 'display',
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def display(image, server_name=':0'):
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"""Displays the passed ``image``.
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:param image: an image to display
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:type image: :class:`~wand.image.Image`
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:param server_name: X11 server name to use. it is ignored and not used
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for Mac. default is ``':0'``
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:type server_name: :class:`str`
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"""
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if not isinstance(image, Image):
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raise TypeError('image must be a wand.image.Image instance, not ' +
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repr(image))
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system = platform.system()
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if system == 'Windows':
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try:
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image.save(filename='win:.')
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except DelegateError:
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pass
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else:
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return
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if system in ('Windows', 'Darwin'):
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ext = '.' + image.format.lower()
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if ext in ('miff', 'xc'):
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ext = 'png'
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path = tempfile.mktemp(suffix=ext)
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image.save(filename=path)
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os.system(('start ' if system == 'Windows' else 'open ') + path)
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else:
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library.MagickDisplayImage.argtypes = [ctypes.c_void_p,
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ctypes.c_char_p]
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library.MagickDisplayImage(image.wand, str(server_name).encode())
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if __name__ == '__main__':
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if len(sys.argv) < 2:
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print('usage: python -m wand.display FILE', file=sys.stderr)
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raise SystemExit
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path = sys.argv[1]
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try:
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with Image(filename=path) as image:
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display(image)
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except BlobError:
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print('cannot read the file', path, file=sys.stderr)
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