108 lines
2.6 KiB
Python
108 lines
2.6 KiB
Python
#
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# The Python Imaging Library.
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# $Id$
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#
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# Microsoft Image Composer support for PIL
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#
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# Notes:
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# uses TiffImagePlugin.py to read the actual image streams
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#
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# History:
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# 97-01-20 fl Created
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#
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# Copyright (c) Secret Labs AB 1997.
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# Copyright (c) Fredrik Lundh 1997.
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#
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# See the README file for information on usage and redistribution.
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#
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from __future__ import annotations
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import olefile
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from . import Image, TiffImagePlugin
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#
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# --------------------------------------------------------------------
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def _accept(prefix: bytes) -> bool:
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return prefix[:8] == olefile.MAGIC
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##
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# Image plugin for Microsoft's Image Composer file format.
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class MicImageFile(TiffImagePlugin.TiffImageFile):
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format = "MIC"
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format_description = "Microsoft Image Composer"
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_close_exclusive_fp_after_loading = False
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def _open(self) -> None:
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# read the OLE directory and see if this is a likely
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# to be a Microsoft Image Composer file
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try:
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self.ole = olefile.OleFileIO(self.fp)
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except OSError as e:
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msg = "not an MIC file; invalid OLE file"
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raise SyntaxError(msg) from e
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# find ACI subfiles with Image members (maybe not the
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# best way to identify MIC files, but what the... ;-)
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self.images = [
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path
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for path in self.ole.listdir()
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if path[1:] and path[0][-4:] == ".ACI" and path[1] == "Image"
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]
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# if we didn't find any images, this is probably not
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# an MIC file.
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if not self.images:
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msg = "not an MIC file; no image entries"
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raise SyntaxError(msg)
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self.frame = -1
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self._n_frames = len(self.images)
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self.is_animated = self._n_frames > 1
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self.__fp = self.fp
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self.seek(0)
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def seek(self, frame):
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if not self._seek_check(frame):
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return
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try:
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filename = self.images[frame]
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except IndexError as e:
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msg = "no such frame"
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raise EOFError(msg) from e
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self.fp = self.ole.openstream(filename)
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TiffImagePlugin.TiffImageFile._open(self)
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self.frame = frame
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def tell(self) -> int:
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return self.frame
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def close(self) -> None:
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self.__fp.close()
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self.ole.close()
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super().close()
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def __exit__(self, *args: object) -> None:
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self.__fp.close()
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self.ole.close()
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super().__exit__()
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#
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# --------------------------------------------------------------------
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Image.register_open(MicImageFile.format, MicImageFile, _accept)
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Image.register_extension(MicImageFile.format, ".mic")
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