Source code for PIL.GribStubImagePlugin

#
# The Python Imaging Library
# $Id$
#
# GRIB stub adapter
#
# Copyright (c) 1996-2003 by Fredrik Lundh
#
# See the README file for information on usage and redistribution.
#

from . import Image, ImageFile
from ._binary import i8

_handler = None


[docs]def register_handler(handler): """ Install application-specific GRIB image handler. :param handler: Handler object. """ global _handler _handler = handler
# -------------------------------------------------------------------- # Image adapter def _accept(prefix): return prefix[0:4] == b"GRIB" and i8(prefix[7]) == 1
[docs]class GribStubImageFile(ImageFile.StubImageFile): format = "GRIB" format_description = "GRIB" def _open(self): offset = self.fp.tell() if not _accept(self.fp.read(8)): raise SyntaxError("Not a GRIB 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("GRIB save handler not installed") _handler.save(im, fp, filename) # -------------------------------------------------------------------- # Registry Image.register_open(GribStubImageFile.format, GribStubImageFile, _accept) Image.register_save(GribStubImageFile.format, _save) Image.register_extension(GribStubImageFile.format, ".grib")