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77 lines
1.7 KiB
Python
77 lines
1.7 KiB
Python
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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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# PCD file handling
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#
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# History:
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# 96-05-10 fl Created
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# 96-05-27 fl Added draft mode (128x192, 256x384)
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#
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# Copyright (c) Secret Labs AB 1997.
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# Copyright (c) Fredrik Lundh 1996.
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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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__version__ = "0.1"
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import Image, ImageFile
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##
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# Image plugin for PhotoCD images. This plugin only reads the 768x512
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# image from the file; higher resolutions are encoded in a proprietary
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# encoding.
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class PcdImageFile(ImageFile.ImageFile):
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format = "PCD"
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format_description = "Kodak PhotoCD"
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def _open(self):
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# rough
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self.fp.seek(2048)
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s = self.fp.read(2048)
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if s[:4] != "PCD_":
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raise SyntaxError, "not a PCD file"
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orientation = ord(s[1538]) & 3
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if orientation == 1:
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self.tile_post_rotate = 90 # hack
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elif orientation == 3:
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self.tile_post_rotate = -90
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self.mode = "RGB"
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self.size = 768, 512 # FIXME: not correct for rotated images!
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self.tile = [("pcd", (0,0)+self.size, 96*2048, None)]
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def draft(self, mode, size):
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if len(self.tile) != 1:
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return
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d, e, o, a = self.tile[0]
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if size:
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scale = max(self.size[0] / size[0], self.size[1] / size[1])
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for s, o in [(4,0*2048), (2,0*2048), (1,96*2048)]:
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if scale >= s:
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break
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# e = e[0], e[1], (e[2]-e[0]+s-1)/s+e[0], (e[3]-e[1]+s-1)/s+e[1]
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# self.size = ((self.size[0]+s-1)/s, (self.size[1]+s-1)/s)
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self.tile = [(d, e, o, a)]
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return self
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#
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# registry
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Image.register_open("PCD", PcdImageFile)
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Image.register_extension("PCD", ".pcd")
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