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71 lines
1.6 KiB
Python
71 lines
1.6 KiB
Python
5 years ago
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#
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# The Python Imaging Library.
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# $Id$
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#
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# PIXAR raster support for PIL
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#
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# history:
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# 97-01-29 fl Created
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#
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# notes:
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# This is incomplete; it is based on a few samples created with
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# Photoshop 2.5 and 3.0, and a summary description provided by
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# Greg Coats <gcoats@labiris.er.usgs.gov>. Hopefully, "L" and
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# "RGBA" support will be added in future versions.
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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 . import Image, ImageFile
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from ._binary import i16le as i16
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#
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# helpers
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def _accept(prefix):
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return prefix[:4] == b"\200\350\000\000"
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##
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# Image plugin for PIXAR raster images.
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class PixarImageFile(ImageFile.ImageFile):
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format = "PIXAR"
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format_description = "PIXAR raster image"
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def _open(self):
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# assuming a 4-byte magic label
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s = self.fp.read(4)
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if not _accept(s):
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raise SyntaxError("not a PIXAR file")
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# read rest of header
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s = s + self.fp.read(508)
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self._size = i16(s[418:420]), i16(s[416:418])
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# get channel/depth descriptions
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mode = i16(s[424:426]), i16(s[426:428])
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if mode == (14, 2):
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self.mode = "RGB"
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# FIXME: to be continued...
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# create tile descriptor (assuming "dumped")
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self.tile = [("raw", (0, 0) + self.size, 1024, (self.mode, 0, 1))]
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#
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# --------------------------------------------------------------------
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Image.register_open(PixarImageFile.format, PixarImageFile, _accept)
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Image.register_extension(PixarImageFile.format, ".pxr")
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