Source code for PIL.FitsStubImagePlugin

#
# The Python Imaging Library
# $Id$
#
# FITS stub adapter
#
# Copyright (c) 1998-2003 by Fredrik Lundh
#
# See the README file for information on usage and redistribution.
#

from . import Image, ImageFile

_handler = None


[docs]def register_handler(handler): """ Install application-specific FITS image handler. :param handler: Handler object. """ global _handler _handler = handler
# -------------------------------------------------------------------- # Image adapter def _accept(prefix): return prefix[:6] == b"SIMPLE"
[docs]class FITSStubImageFile(ImageFile.StubImageFile): format = "FITS" format_description = "FITS" def _open(self): offset = self.fp.tell() if not _accept(self.fp.read(6)): raise SyntaxError("Not a FITS file") # FIXME: add more sanity checks here; mandatory header items # include SIMPLE, BITPIX, NAXIS, etc. self.fp.seek(offset) # make something up self.mode = "F" self._size = 1, 1 loader = self._load() if loader: loader.open(self) def _load(self): return _handler
def _save(im, fp, filename): if _handler is None or not hasattr("_handler", "save"): raise IOError("FITS save handler not installed") _handler.save(im, fp, filename) # -------------------------------------------------------------------- # Registry Image.register_open(FITSStubImageFile.format, FITSStubImageFile, _accept) Image.register_save(FITSStubImageFile.format, _save) Image.register_extensions(FITSStubImageFile.format, [".fit", ".fits"])