diff options
Diffstat (limited to 'env/lib/python3.10/site-packages/PIL/GribStubImagePlugin.py')
-rw-r--r-- | env/lib/python3.10/site-packages/PIL/GribStubImagePlugin.py | 73 |
1 files changed, 73 insertions, 0 deletions
diff --git a/env/lib/python3.10/site-packages/PIL/GribStubImagePlugin.py b/env/lib/python3.10/site-packages/PIL/GribStubImagePlugin.py new file mode 100644 index 0000000..4575f82 --- /dev/null +++ b/env/lib/python3.10/site-packages/PIL/GribStubImagePlugin.py @@ -0,0 +1,73 @@ +# +# 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 + +_handler = None + + +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[:4] == b"GRIB" and prefix[7] == 1 + + +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 OSError("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") |