mirror of https://github.com/sgoudham/Enso-Bot.git
You cannot select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
77 lines
1.6 KiB
Python
77 lines
1.6 KiB
Python
5 years ago
|
#
|
||
|
|
# 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
|
||
|
|
|
||
|
|
|
||
|
|
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"
|
||
|
|
|
||
|
|
|
||
|
|
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 OSError("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"])
|