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Diffstat (limited to 'PIL/BufrStubImagePlugin.py')
-rw-r--r-- | PIL/BufrStubImagePlugin.py | 68 |
1 files changed, 68 insertions, 0 deletions
diff --git a/PIL/BufrStubImagePlugin.py b/PIL/BufrStubImagePlugin.py new file mode 100644 index 0000000..ee02659 --- /dev/null +++ b/PIL/BufrStubImagePlugin.py @@ -0,0 +1,68 @@ +# +# The Python Imaging Library +# $Id: BufrStubImagePlugin.py 2134 2004-10-06 08:55:20Z fredrik $ +# +# BUFR stub adapter +# +# Copyright (c) 1996-2003 by Fredrik Lundh +# +# See the README file for information on usage and redistribution. +# + +import Image, ImageFile + +_handler = None + +## +# Install application-specific BUFR image handler. +# +# @param handler Handler object. + +def register_handler(handler): + global _handler + _handler = handler + +# -------------------------------------------------------------------- +# Image adapter + +def _accept(prefix): + return prefix[:4] == "BUFR" or prefix[:4] == "ZCZC" + +class BufrStubImageFile(ImageFile.StubImageFile): + + format = "BUFR" + format_description = "BUFR" + + def _open(self): + + offset = self.fp.tell() + + if not _accept(self.fp.read(8)): + raise SyntaxError("Not a BUFR file") + + 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("BUFR save handler not installed") + _handler.save(im, fp, filename) + + +# -------------------------------------------------------------------- +# Registry + +Image.register_open(BufrStubImageFile.format, BufrStubImageFile, _accept) +Image.register_save(BufrStubImageFile.format, _save) + +Image.register_extension(BufrStubImageFile.format, ".bufr") |